Skocz do pozycji: 1.

Tytuł:

Efektywność – rozważania nad istotą i typologią

Autorzy:

Kozuń-Cieślak, Grażyna

Powiązania:

https://bibliotekanauki.pl/articles/630355.pdf

Data publikacji:

2013

Wydawca:

Szkoła Główna Handlowa w Warszawie

Tematy:

typology of efficiency, static efficiency, dynamic efficiency, technical efficiency, allocative efficiency, X-efficiency.

Opis:

In today’s world the term efficiency gained a status of an imperative at all levels of economic activity (micro, mezo, macro) as well as in all sectors of the economy (private, public, non-profit). The prevalence of “efficiency” in scientific discussions discloses existence of a number of approaches to the understanding of this concept as well as existence of conceptual differences regarding the essence of efficiency, resulting from different ideological foundations of relevant economic theories. This study distinguishes between two analytical approaches: 1) static efficiency – conceptually inscribed in the paradigm of neoclassical economics, 2) dynamic efficiency – developed on the grounds of heterodox evolutionary economics. Within these two theoretical approaches various types of efficiency have been identified and characterized. This resulted in a typology that established a conceptual framework for clarifying different meanings of the term “efficiency”.

Źródło:

Kwartalnik Kolegium Ekonomiczno-Społecznego Studia i Prace; 2013, 4; 13-42
2082-0976

Pojawia się w:

Kwartalnik Kolegium Ekonomiczno-Społecznego Studia i Prace

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

Modelling the supply chain for the company and indicators for assessing the efficiency of its functioning

Autorzy:

Jacyna-Gołda, I.

Powiązania:

https://bibliotekanauki.pl/articles/244701.pdf

Data publikacji:

2016

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

efficiency
supply chain efficiency indicator
supply chain efficiency

Opis:

The article presents selected issues concerning the modelling of the supply chain in the evaluation of the efficiency of tasks realization. In the process of determination, efficiency of the functioning of the supply chain it is necessary to determine the components of both the effects and expenditures in quantitative terms. It is assumed that the effect resulting from action taken depends on the problem under consideration, for example, the result may be the amount of the profits, savings resulting from implemented solutions or measurable improvement of the quality system, expressed e.g. percentage. While the outlay incurred for the implementation of the action is, in general, the expense of implementing this action. The article pointed out that the assessment of the efficiency can be used to decide on the choice of a decision of the many variants of solutions to the problem. In this respect, important are indicators of the efficiency both the technical, economic, quality, and organizational. In the article were also presented possible approaches to improve the efficiency of the supply chain. In the problems of assessing efficiency of functioning of systems with a complex functional structure such as supply, chains increasingly are applicable algorithms based on the so-called heuristics. Hence, in the article briefly have been characterized also chosen heuristic algorithms – genetic algorithms.

Źródło:

Journal of KONES; 2016, 23, 3; 209-216
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Problems of Complex Evaluation of Production Process Efficiency

Autorzy:

Koliński, A.
Śliwczyński, B.

Powiązania:

https://bibliotekanauki.pl/articles/409538.pdf

Data publikacji:

2016

Wydawca:

Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej

Tematy:

production process efficiency
economic efficiency
operational efficiency
controlling

Opis:

Analysis of production process efficiency is an essential analytical tool of each enterprise. Focusing on market competitiveness, managers are forced to use increasingly detailed analysis of processes occurring in enterprise. Analysis of production process efficiency is not clearly defined in the scientific literature, making it difficult to correct use in business practice. In this article the authors present problems of properly define the production efficiency in the scientific literature and analyze problems of utilization of these methods in the research of economic practice.

Źródło:

Research in Logistics & Production; 2016, 6, 3; 231-244
2083-4942
2083-4950

Pojawia się w:

Research in Logistics & Production

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Using the crooked fitness of organizations in managing the change

Autorzy:

Jasińska, Joanna
Stavnycha, Nataliia

Powiązania:

https://bibliotekanauki.pl/articles/1177312.pdf

Data publikacji:

2018

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

change
efficiency
the efficiency curve

Opis:

The paper begins with the presentation of efficiency curve during the organizational change, and it’s determinants. It is emphasized, that change managers can influence on depth and time of endure the efficiency. On this background paper presents the actions which could diminish the costs of changes. They are divided into phases of change process.

Źródło:

World Scientific News; 2018, 104; 16-27
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Efektywność jako wyznacznik gospodarowania. Kontekst ekonomiczno-społeczny
Efficiency as a determinant of management. The economic and social context

Autorzy:

Kwarcińska, A.

Powiązania:

https://bibliotekanauki.pl/articles/134566.pdf

Data publikacji:

2018

Wydawca:

Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego

Tematy:

efektywność
efektywność gospodarowania
efektywność ekonomiczna
efektywność społeczna
efficiency
management efficiency
economic efficiency
social efficiency

Opis:

Efektywność jest pojęciem często stosowanym i wielorako interpretowanym. Funkcjonuje w perspektywie różnych nauk. Powszechnie występujące dookreślenie efektywność ekonomiczna, sugerujące doprecyzowanie tego terminu, nie stanowi też gwarancji odnalezienia jednoznacznej definicji. Różne ujęcia problemów związanych z efektywnością gospodarowania generują potrzebę wielowymiarowego spojrzenia na tę kategorię, także w kontekście społecznym. Niniejsze opracowanie stanowi próbę zebrania i uporządkowania zróżnicowanej interpretacji efektywności ekonomicznej według studiów literatury przedmiotu, jak również zwrócenia uwagi na rosnące znaczenie i potrzebę równorzędnego traktowania niezwykle ważnej efektywności społecznej.
Efficiency is a frequently used and multi-interpreted concept. It functions in the perspective of various sciences. The economic effectiveness that is commonly mentioned, suggesting the clarification of this term, is also not a guarantee of finding an unambiguous definition. Different views of problems related to the effectiveness of management generate the need for a multidimensional view of this category, also in the social context. This study is an attempt to collect and organize a diversified interpretation of economic efficiency according to the literature on the subject, as well as to draw attention to the growing importance and need for equal treatment of extremely important social efficiency.

Źródło:

Problemy Transportu i Logistyki; 2018, 41, 1; 87-96
1644-275X
2353-3005

Pojawia się w:

Problemy Transportu i Logistyki

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

The Role of Economic Efficiency in Competition Law

Autorzy:

Jurczyk, Zbigniew

Powiązania:

https://bibliotekanauki.pl/articles/530221.pdf

Data publikacji:

2017-12-31

Wydawca:

Uniwersytet Warszawski. Wydawnictwo Naukowe Wydziału Zarządzania

Tematy:

dynamic efficiency
economic efficiency
efficient competition
innovations
static efficiency
tying

Opis:

The main focus of the paper is the function of economics in the current application of competition law. While advocating further economization of the law, it is seen as necessary to widen the extent to which aspects of economic efficiency encompassing static and dynamic efficiency are taken into consideration in an antitrust analysis. Much attention is devoted to these issues, while clarifying what is meant by them, how they are to be understood and implemented in the practice of antitrust authorities, as well as discussing their importance for the promotion of innovation. It is noted that accounting for the economic efficiency aspects differently in the light of competition law allows for the assessment of the market behavior of dominant companies, which traditionally has been seen as anticompetitive. This main issue of the paper is analyzed extensively and explained using the case of Microsoft, a company accused by the US and EU antitrust authorities of abusing its dominant position on the market of operating systems in that it integrated the sale of its base product Windows OS exclusively with other applications (Media Player and Internet Explorer). The differences presented in the research part of the paper as to the way Microsoft was treated by these authorities originated in their different methodology of analysis and assessment of the effects of the sales model launched by Microsoft for products offered to the PC manufacturers and their users, in spite of the US and EU antitrust authorities adopting the same evaluation standard – consumer welfare. Aspects of dynamic efficiency adequate in the assessment of the behavior of innovative firms holding a dominant position proved to be deciding. On the other side of the Atlantic, taking into account the aspects of dynamic efficiency was crucial in coming up with a lighter assessment of Microsoft’s tying compared to the European authorities’ assessment which was based largely on the structural analysis, where the benefits arising from dynamic efficiency are not visible. It is clear from the decisions made by the Commission that it favours regulation over effects generated by competition forces at a later time.

Źródło:

Yearbook of Antitrust and Regulatory Studies; 2017, 10(16); 107-126
1689-9024
2545-0115

Pojawia się w:

Yearbook of Antitrust and Regulatory Studies

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Problem efektywności banków w literaturze przedmiotu

Autorzy:

Kubiszewska, Katarzyna

Powiązania:

https://bibliotekanauki.pl/articles/630360.pdf

Data publikacji:

2015

Wydawca:

Szkoła Główna Handlowa w Warszawie

Tematy:

efficiency, banking sector, efficiency during transformation

Opis:

The purpose of this article is to analyze the literature related to the problem ofbank effectiveness. The article is divided into three parts. The first one is devotedto the various concepts of effectiveness. The second part discusses the methodsand tools used to measure the level of efficiency of a banking market. The thirdpart presents results of selected studies on this issue, with a special emphasis onthe banking sectors of economies during systematic transformation.

Źródło:

Kwartalnik Kolegium Ekonomiczno-Społecznego Studia i Prace; 2015, 3, 2; 65-79
2082-0976

Pojawia się w:

Kwartalnik Kolegium Ekonomiczno-Społecznego Studia i Prace

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Technical efficiency and the methods of its measurement
Efektywność techniczna i metody jej pomiaru

Autorzy:

Kulik, Justyna

Powiązania:

https://bibliotekanauki.pl/articles/425209.pdf

Data publikacji:

2017

Wydawca:

Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu

Tematy:

efficiency
technical efficiency
measurement
methods
DEA

Opis:

The main purpose of this publication was to try systemizing the efficiency per-formance with particular regard to technical efficiency and measurement methods, and to identify the problems in defining and measuring the existing problems. The paper presents definitions of efficiency by selected authors, the classification and characterization of vari-ous types of efficiency made with particular emphasis on technical efficiency, and the basic methods for testing the effectiveness of the division on the indicator parametric and para-metric detailing the different measurement methods. A detailed analysis of the non-parametric methods for testing the effectiveness of technical support is the DEA (Data En-velopment Analysis) method presented with the example of the procedure for calculation of relative efficiency. The study identifies various modifications of the DEA method and also signalled areas where this method can be used to measure the effectiveness of specific enti-ties. The main research method used in the present study was to review and analyze the lit-erature on the subject topic.

Źródło:

Econometrics. Ekonometria. Advances in Applied Data Analytics; 2017, 3 (57); 72-87
1507-3866

Pojawia się w:

Econometrics. Ekonometria. Advances in Applied Data Analytics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

The energy - efficient two - phase driving cycle (eta n greather than 1) can efficiency eta n in vehicles be higher than 1.0 ?

Autorzy:

Ubysz, A.

Powiązania:

https://bibliotekanauki.pl/articles/242928.pdf

Data publikacji:

2012

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

efficiency
driving cycle
overall engine efficiency

Opis:

The study presents an important part of fourth chapter of the monograph 'Energy Consumption in Relation to Fuel Efficiency Under Complex Driving Conditions' (2003) concerning opportunities to improve vehicle drive efficiency through application, during one phase of driving in neutral in two-phase driving cycle. Theoretical simulation of total energy consumption in vehicles with SI engine provided explanation of a relatively low fuel efficiency observed under real driving conditions in serial cars [1]. The study cites the original method of calculations developed by the author in order to calculate the efficiency of vehicle power unit in two-phase driving cycle assuming that one of the phases might be non-driving. The calculations were made for complex driving conditions, i.e. simulated changes with predefined steps for road slope (-3.5o to 3.5o), acceleration (-0.36-0.36 m/s2) and average speed (60-140 kmph) for a distance of 2x500 m. The results of calculation variants for each type of a drive system of a car proved that there are significant limitations of optimising the fuel consumption of cars. The first one is conditioned by the fact that the engine works at full dynamic load and the second one by the fact that idle running is against the 'Highway Code'.

Źródło:

Journal of KONES; 2012, 19, 4; 633-642
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

WORK EFFICIENCY. AN ATTEMPT AT ORDERING THE CONCEPT (Efektywnosc pracy - próba uporzadkowania pojecia)

Autorzy:

Skowron-Mielnik, Beata

Powiązania:

https://bibliotekanauki.pl/articles/599260.pdf

Data publikacji:

2009-02-15

Wydawca:

Instytut Pracy i Spraw Socjalnych

Tematy:

WORK EFFICIENCY (DEFINITION & CLASSIFICATION)
WORK EFFICIENCY - SOCIAL ASPECTS
WORK EFFICIENCY'S CONSEQUENCES

Opis:

The aim of this article is to present terminological concerns connected with work efficiency as well as to attempt to define the issue. It is intended to serve as a clarification in the discussion on the practical aspects of work efficiency, including work outcome measurement and high work efficiency systems. Three issues are of prime importance in discussions on work efficiency: What are work outcomes and inputs? How can work efficiency be defined and evaluated? What factors influence the level of work efficiency? Another important question is how to include the social aspects of work efficiency and their consequences on assessing it.

Źródło:

Zarządzanie Zasobami Ludzkimi; 2009, 1(66) Dokąd zmierzają przedsiębiorstwa w dobie globalizacji i kryzysu finansowego?; 31-44
1641-0874

Pojawia się w:

Zarządzanie Zasobami Ludzkimi

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

Economic efficiency analysis of small-scale tomato farmers in Greater Letaba Municipality

Autorzy:

Nakana, Tshegofatso Morgan
Hlongwane, Johannes Jan
Belete, Abenet

Powiązania:

https://bibliotekanauki.pl/articles/2033370.pdf

Data publikacji:

2021-12-28

Wydawca:

Uniwersytet Przyrodniczy w Poznaniu. Wydawnictwo Uczelniane

Tematy:

economic efficiency
technical efficiency
allocative efficiency
tomato
and small-scale farm

Opis:

This paper analysed the economic efficiency of small-scale tomato farmers in the Greater Letaba municipality of South Africa’s Limpopo Province. Primary data were collected from 68 tomato farmers based on structured questionnaires and using convenience and purposive sampling procedures. The Cobb-Douglas production function was used to analyse the level of economic efficiency. The study utilised the output approach, where the output achieved by the farmers is compared to the maximum output attainable using the given inputs. The empirical results reveal that mean technical, allocative, and economic efficiency levels are at 0.95, 0.41 and 0.39, respectively. The study also found that land (farm size), seedlings, labour, pesticides and water have a positively significant relationship with the production of tomatoes in the study area. Therefore, it is recommended that the Department of Agriculture, Land Reform and Rural Development provide farmers with enough extension services by employing more extension personnel. Government programmes such as the Comprehensive Agricultural Support Programme should be intensified – through the pillar of training and capacity building – to reach the small-scale farmers in the municipality, whereby farmers should be provided with training on the recommended minimum and maximum application of inputs like pesticides, fertilisers, seedlings and water in tomato production.

Źródło:

Journal of Agribusiness and Rural Development; 2021, 62, 4; 429-434
1899-5241

Pojawia się w:

Journal of Agribusiness and Rural Development

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

Eco-Efficiency in Creating the Ecological Safety
Rola eko-wydajności w zakresie kształtowania bezpieczeństwa ekologicznego

Autorzy:

Szyja, Paulina

Powiązania:

https://bibliotekanauki.pl/articles/529851.pdf

Data publikacji:

2015

Wydawca:

Wyższa Szkoła Bankowa we Wrocławiu

Tematy:

environment
efficiency
eco-efficiency
ecological safety
mankind

Opis:

The issue of eco-efficiency is associated with actions aimed at increasing the productivity of raw materials, natural resources and energy savings in production and at the same time offering environmentally friendly products and services. This kind of action is beneficial to businesses and the environment, as well as the society. By reducing the pressure on the environment, caused by production processes, consumption and investment, it is possible to reduce impact of anthropological risks and simultaneously ensuring ecological safety. This article addresses the explanation of the possible connection of eco-efficiency and ecological safety. Considerations include the issue of terminology, as well as key elements of both concepts. The main thesis is: creating solutions for ecoefficiency is associated with ecological safety.

Źródło:

Central and Eastern European Journal of Management and Economics (CEEJME); 2015, 3; 201-216
2353-9119

Pojawia się w:

Central and Eastern European Journal of Management and Economics (CEEJME)

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

The work efficiency management (as a) – determinant of the development of modern organizations

Autorzy:

Szejniuk, Aleksandra

Powiązania:

https://bibliotekanauki.pl/articles/451715.pdf

Data publikacji:

2019

Wydawca:

Wyższa Szkoła Gospodarki Euroregionalnej im. Alcide De Gasperi w Józefowie

Tematy:

work efficiency
competencies
coaching
strategy
efficiency management

Opis:

Today’s enterprises, regardless of their size, have to face many new challenges. These include globalization, the use of new technologies and the creation of intellectual capital as a source of the competitive advantage. And moreover the need to act in a changing environment. The organizations must be characterized by a speed of action, flexibility and the ability to learn quickly. They should have employees with high competences who can effectively manage work. The work efficiency management is a business management subsystem. The implementation of this system should take into account not only the material potential, but above all the people. It has a decisive impact on the company’s competitiveness in the market. It allows you to achieve a success. Lawyers are a flexible and dynamic resource that is able to quickly respond to any changes in the company’s strategic goals. Currently, the human resources in the organization are treated as the most precious and the most expensive way. The idea of managing work efficiency is to strive to make the best use of human resources by constantly shaping the engagement and inspiration of people for effective actions for the benefit of the enterprise. A comprehensive approach to work efficiency management is an invaluable tool in building a competitive advantage.

Źródło:

Journal of Modern Science; 2019, 40, 1; 285-303
1734-2031

Pojawia się w:

Journal of Modern Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

Unboxing the black box on the dimensions of social globalisation and the efficiency of microfinance institutions in Asia

Autorzy:

Hussain, Hafezali Iqbal
Szczepańska-Woszczyna, Katarzyna
Kamarudin, Fakarudin
Anwar, Nazratul Aina Mohamad
Saudi, Mohd Haizam Mohd

Powiązania:

https://bibliotekanauki.pl/articles/19233712.pdf

Data publikacji:

2021

Wydawca:

Instytut Badań Gospodarczych

Tematy:

microfinance institutions
social globalisation
social efficiency
financial efficiency

Opis:

Research background: Microfinance institutions (MFIs) play an important role in alleviating poverty. Thus, MFIs should be efficient in order to ensure that their objectives on social welfare and financial performance can be achieved by identifying the potential determinants, specifically on social globalisation. Purpose of the article: This paper examines the impacts of the social globalisation dimensions of interpersonal, informational, and cultural globalisations on the financial and social efficiency of MFIs. Methods: The data period covered the years 2011-2018; the data set consists of 176 MFIs from six Asian countries. The Data Envelopment Analysis (DEA) approach was employed to examine the MFIs' efficiency levels. Generalised Least Square (GLS) regressions were used to analyse the impacts of social globalisation and other determinants towards the efficiency of MFIs. Findings and value added: Interpersonal globalisation had a significantly negative correlation with social efficiency, suggesting that increasing the number of foreigners in management intrudes on local managers' decisions. Informational globalisation had a significantly positive correlation with financial and social efficiency, which signifies that more information produces monopolistic profits in this industry. Finally, cultural globalisation had a positive correlation with social efficiency, demonstrating that a global trading culture improves the abilities and technological skills for labour development and enhances MFIs? social efficiency. In general, the Cobb Douglas Production theory explained the understanding of the impacts social globalisation has on MFI efficiency. Furthermore, the findings from this study could provide important scientific, practical gap and contribute new insights and implications to various parties. Firstly, governments or policymakers can establish effective national policies and strategies. Secondly, this study could support investors in monitoring and understanding the performance of MFIs. Finally, the research could fill scholarly gaps and uncover more potential factors that influence the efficiency of MFIs.

Źródło:

Oeconomia Copernicana; 2021, 12, 3; 557-592
2083-1277

Pojawia się w:

Oeconomia Copernicana

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

Improved Water-Filling Power Allocation for Energy-Efficient Massive MIMO Downlink Transmissions

Autorzy:

Noor Shahida, M. K.
Nordin, R.
Insmail, M.

Powiązania:

https://bibliotekanauki.pl/articles/227000.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

energy efficiency
Massive MIMO
power allocation
spectral efficiency

Opis:

Energy Efficiency (EE) is becoming increasingly important for wireless communications and has caught more attention due to steadily rising energy costs and environmental concerns. Recently, a new network architecture known as Massive Multiple-Input Multiple-Output (MIMO) has been proposed with the remarkable potential to achieve huge gains in EE with simple linear processing. In this paper, a power allocation algorithm is proposed for EE to achieve the optimal EE in Massive MIMO. Based on the simplified expression, we develop a new algorithm to compute the optimal power allocation algorithm and it has been compared with the existing scheme from the previous literature. An improved water filling algorithm is proposed and embedded in the power allocation algorithm to maximize EE and Spectral Efficiency (SE). The numerical analysis of the simulation results indicates an improvement of 40% in EE and 50% in SE at the downlink transmission, compared to the other existing schemes. Furthermore, the results revealed that SE does not influence the EE enhancement after using the proposed algorithm as the number of Massive MIMO antenna at the Base Station (BS) increases.

Źródło:

International Journal of Electronics and Telecommunications; 2017, 63, 1; 79-84
2300-1933

Pojawia się w:

International Journal of Electronics and Telecommunications

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Efficiency issues in Poland’s Research Institutes
Problematyka efektywności instytutów badawczych w Polsce

Autorzy:

Doński, Andrzej

Powiązania:

https://bibliotekanauki.pl/articles/28762945.pdf

Data publikacji:

2023

Wydawca:

Akademia Finansów i Biznesu Vistula

Tematy:

efficiency
efficiency analysis
efficiency categories
research institutes
efektywność
analiza efektywności
kategorie efektywności
instytuty badawcze

Opis:

The article aimed to specify the complexity of assessing the management’s efficiency of research institutes in Poland, in the context of the implementation of tasks resulting from their principal and ancillary activities, as well as other assignments commissioned by public administration authorities. The author attempted to clarify the concept of efficiency by reviewing the subject literature, to find a standard unit to assess research institutes’ activities in terms of efficiency. The analysis carried out based on a literature review, taking into account the complexity of duties of the research institutes, showed that there was no ultimate typology of efficiency, as research establishments have been set up to carry out a broad range of tasks of an economic, social and scientific nature. For that reason, efficiency can be only assessed against the priority, principal, and commissioned tasks implemented by each institute.
Celem rozważań jest przybliżenie złożoności pomiaru efektywności zarządzania instytutów badawczych w Polsce w aspekcie realizacji zadań wynikających z działalności podstawowej, pomocniczej, jak również innych zadań zleconych przez organy administracji publicznej. Autor przybliża pojęcie efektywności dokonując przeglądu literatury łącząc to z próbą znalezienia wybranej jednostki pomiaru efektywności działalności instytutów badawczych. W wyniku analizy literatury oraz złożoności zadań realizowanych przez instytuty badawcze, autor wnioskuje, że nie ma jednoznacznej typologii efektywności, bowiem jednostki są powoływane w celu realizacji różnorodnych zadań o charakterze ekonomicznym, społecznym oraz naukowym. Tym samym efektywność każdego instytutu może być oceniana przez pryzmat priorytetowych oraz podstawowych i zleconych zadań.

Źródło:

Społeczeństwo i Polityka; 2023, 2(75); 13-33
1733-8050

Pojawia się w:

Społeczeństwo i Polityka

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

A new approach in separation process evaluation. Efficiency ratio and upgrading curves

Autorzy:

Irannajad, M.
Nuri, O. S.
Allahkarami, E.

Powiązania:

https://bibliotekanauki.pl/articles/110189.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

separation efficiency
mineral processing
selectivity index
process evaluation
efficiency ratio
operation efficiency
Separation Process

Opis:

In mineral processing separation efficiency (SE), operation efficiency (OE), selectivity index (SI) and other indices have been used to evaluate the separation process. Up to now, no study has been conducted on the relationship between the SE, OE and SI indices. In this research, two upgrading curves are proposed based on the above indices for process and selectivity evaluation. The first upgrading curve is based on recovery R, SE, and OE as a function of concentrate grade. This curve has three background lines, including no upgrading line, ideal upgrading line and the ideal mixing line. The proposed upgrading curve is applicable not only for process evaluation by specification of OE and SE, but also for selectivity evaluation with the lowest difference between SE and OE. The curve showed that the recovery value is always greater than the SE and OE values. The parameters of OE, SE and R were used for plotting the upgrading curve as a function of concentrate grade taking into consideration all of them at a time. A new selectivity indicator, namely Efficiency Ratio (ER) as the selectivity parameter, is proposed as the ratio of OE to SE. The ER values fluctuate between 1 and . It can be presented as a function of concentrate and tailing grades (ER = [c(1-t)]/[1(c-t)]). The results showed that ER is insensitive to the feed grade and has the inverse relationship with SI. To measure the separation selectivity, another upgrading curve is proposed based on ER and SI parameters. This curve is divided into seven separation classes for evaluation the class of a separation process from ideal class to no separation one. The results of this research can be useful for separation process evaluation.

Źródło:

Physicochemical Problems of Mineral Processing; 2018, 54, 3; 847-857
1643-1049
2084-4735

Pojawia się w:

Physicochemical Problems of Mineral Processing

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Verification of the modified AGT method applied to determining efficiency of squirrel-cage induction motor

Autorzy:

Figura, R.
Szychta, L.
Kwiecień, R.

Powiązania:

https://bibliotekanauki.pl/articles/141240.pdf

Data publikacji:

2012

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

metoda AGT
sprawność silnika
szacowanie wydajności
AGT method
motor efficiency
motor efficiency testing
efficiency estimating

Opis:

The modified air gap torque method to determine the efficiency of squirrelcage induction motor was presented. of testing which continues the authors' work on application of AGT method to estimating induction motor's efficiency are discussed. The proposed method is verified in a number of selected low-power motors.

Źródło:

Archives of Electrical Engineering; 2012, 61, 3; 315-323
1427-4221
2300-2506

Pojawia się w:

Archives of Electrical Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Increasing photovoltaic panel power through water cooling technique

Autorzy:

Matias, C. A.
Santos, L. M.
Alves, A. J.
Calixto, W. P.

Powiązania:

https://bibliotekanauki.pl/articles/136175.pdf

Data publikacji:

2017

Wydawca:

EEEIC International Barbara Leonowicz Szabłowska

Tematy:

photovoltaic panel
water cooling
increasing electrical efficiency
efficiency increase

Opis:

This paper presents the development of a cooling apparatus using water in a commercial photovoltaic panel in order to analyze the increased efficiency through decreased operating temperature. The system enables the application of reuse water flow, at ambient temperature, on the front surface of PV panel and is composed of an inclined plane support, a perforated aluminum profile and a water gutter. A luminaire was specially developed to simulate the solar radiation over the module under test in a closed room, free from the influence of external climatic conditions, to carry out the repetition of the experiment in controlled situations. The first case study was published at EEEIC2016 conference where the panel was submitted to different rates of water flow, from 1 L/min to 4 L/min. In the test conditions without cooling apparatus, the panel reached about 70°C and produced approximately 63Wh. With the cooling apparatus with water flow rate of 2 L/min, the module reached about 50°C and produced approximately 77Wh. However, it has been observed that this water flow was overestimated. A second case study was carried out in order to perform the threshold between the flow and the energy produced. The best ratio was flow of 0.6 L/min and net energy of 77.41Wh. Gain of 22.69% compared to the panel without the cooling system. The best water flow rate was of 0.6 L/min and net energy of 77.41Wh. Gain of 22.69% compared to the panel without the cooling system.

Źródło:

Transactions on Environment and Electrical Engineering; 2017, 2, 1; 60-66
2450-5730

Pojawia się w:

Transactions on Environment and Electrical Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Trend analysis of the productivity of Nigerian seaports

Autorzy:

Nze, Obiageli N.
Okeudo, Geraldine N.
Ejem, Ejem Agwu

Powiązania:

https://bibliotekanauki.pl/articles/2141170.pdf

Data publikacji:

2021

Wydawca:

Fundacja Centrum Badań Socjologicznych

Tematy:

trend analysis
productivity
seaports
concessioning
technical efficiency
scale efficiency

Opis:

This paper assessed the trend of productivity of the existing six Nigerian ports. Secondary data was extracted from National Bureau of Statistics (NBS) Annual Reports, Nigeria Port Authority (NPA) Annual Reports, and Central Bank of Nigeria (CBN) Annual reports. Using the Data Envelopment Analysis technique, it was discovered that Calabar Port had been under-utilized towards the achievement of the required results. On the contrary, Rivers Port requires technical touches in her operations. As a liquid bulk port, the time of loading and discharging of commodities are often more than any other type of port and the turnaround time at this port are often more. Scale optimization is also required in Rivers Port. Inferentially, Lagos Port has been operating on optimal scale size but fluctuating managerial efficiency was experienced in the operation years. As a matter of findings, Tin Can Island has a similar trend to that of Onne Port with low productivities in the pre-concession period which improved consistently in the post-concession year of 2010 till the year 2015. It was also observed that Tin Can Island Port operated on under-utilization of inputs resources in the pre-concession periods till the post-concession year 2010. This reflects the element of wastefulness concerning both inputs and outputs quantities. Delta Port experienced fluctuating scale and technical efficiency trends in both pre and post concession years. Hence, it is observed that productivities' trends vary among the concessioned Nigerian Ports. These could be as a result of the influence of varied exogenous and endogenous factors on individual Port.

Źródło:

Journal of Sustainable Development of Transport and Logistics; 2021, 6, 2; 81-95
2520-2979

Pojawia się w:

Journal of Sustainable Development of Transport and Logistics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Throughput, Spectral, and Energy Efficiency of 5G Massive MIMO Applications Using Different Linear Precoding Schemes

Autorzy:

Salah, Ibrahim
Rahouma, Kamel Hussein
Hussein, Aziza I.
Mabrook, M. Mourad

Powiązania:

https://bibliotekanauki.pl/articles/2203002.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

throughput
massive MIMO
spectral efficiency
energy efficiency
trade-off

Opis:

On fifth-generation wireless networks, a potential massive MIMO system is used to meet the ever-increasing request for high-traffic data rates, high-resolution streaming media, and cognitive communication. In order to boost the trade-off between energy efficiency (EE), spectral efficiency (SE), and throughput in wireless 5G networks, massive MIMO systems are essential. This paper proposes a strategy for EE 5G optimization utilizing massive MIMO technology. The massive MIMO system architecture would enhance the trade-off between throughput and EE at the optimum number of working antennas. Moreover, the EE-SE tradeoff is adjusted for downlink and uplink massive MIMO systems employing linear precoding techniques such as Multiple -Minimum Mean Square Error (M-MMSE), Regularized Zero Forcing (RZF), Zero Forcing (ZF), and Maximum Ratio (MR). Throughput is increased by adding more antennas at the optimum EE, according to the analysis of simulation findings. Next, utilizing M MMSE instead of RZF and ZF, the suggested trading strategy is enhanced and optimized. The results indicate that M-MMSE provides the best tradeoff between EE and throughput at the determined optimal ratio between active antennas and active users equipment’s (UE).

Źródło:

International Journal of Electronics and Telecommunications; 2023, 69, 1; 185--191
2300-1933

Pojawia się w:

International Journal of Electronics and Telecommunications

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

A new family of robust regression estimators utilizing robust regression tools and supplementary attributes

Autorzy:

Sajjad, Irsa
Hanif, Muhammad
Koyuncu, Nursel
Shahzad, Usman
Al-Noor, Nadia H.

Powiązania:

https://bibliotekanauki.pl/articles/1363609.pdf

Data publikacji:

2021-03-03

Wydawca:

Główny Urząd Statystyczny

Tematy:

percentage relative efficiency

Opis:

Zaman and Bulut (2018a) developed a class of estimators for a population mean utilising LMS robust regression and supplementary attributes. In this paper, a family of estimators is proposed, based on the adaptation of the estimators presented by Zaman (2019), followed by the introduction of a new family of regression-type estimators utilising robust regression tools (LAD, H-M, LMS, H-MM, Hampel-M, Tukey-M, LTS) and supplementary attributes. The mean square error expressions of the adapted and proposed families are determined through a general formula. The study demonstrates that the adapted class of the Zaman (2019) estimators is in every case more proficient than that of Zaman and Bulut (2018a). In addition, the proposed robust regression estimators based on robust regression tools and supplementary attributes are more efficient than those of Zaman and Bulut (2018a) and Zaman (2019).The theoretical findings are supported by real-life examples.

Źródło:

Statistics in Transition new series; 2021, 22, 1; 207-216
1234-7655

Pojawia się w:

Statistics in Transition new series

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Socio-Economic Effects of Education in the Context of Economic Return

Autorzy:

Hronec, Stefan
Štrangfeldová, Jana

Powiązania:

https://bibliotekanauki.pl/articles/26179128.pdf

Data publikacji:

2013-06-30

Wydawca:

Wydawnictwo Adam Marszałek

Tematy:

education
effects
efficiency

Opis:

The article presents the issue of evaluation of economic and non-economic effects of education. We proceed from the basic educational terminology and methods for the evaluation of efficiency of education that may be used in this connection. We compare individual methods in terms of their advantages and disadvantages. In our methodology, we applied the selected methods used in evaluation of investments in the private sector to the environment of the public sector and the field of education. We applied the procedures elaborated in the analytical part of the methodological part to particular values, indicators and the environment of higher education institutions. The analytical part presents evaluation of individual efficiency of investments in all three degrees of higher education, as well as in education in branches of studies at higher education institutions.

Źródło:

The New Educational Review; 2013, 32; 172-183
1732-6729

Pojawia się w:

The New Educational Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

The ethical and praxeological conceptions of an act and its evaluation

Autorzy:

Podrez, Ewa

Powiązania:

https://bibliotekanauki.pl/articles/652704.pdf

Data publikacji:

2017

Wydawca:

Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego

Tematy:

goodness
rightness
efficiency

Opis:

The conception of an act and its evaluation constitute the most interesting and important moral subject which consists of a complex set of theoretical and practical issues. The article includes St. Thomas’ conception of the definition of the goodness of an act, Tatarkiewicz’s theory of rightness of an act as a source of its evaluation as well as Kotarbinski’s considerations which deal with the analysis of an act from an efficiency perspective. They have all contributed to the definitione of an act in its several variants and provided the possibility of classification of evaluation of an act on the ethical and praxeological plane.

Źródło:

Annales. Etyka w Życiu Gospodarczym; 2017, 20, 7; 39-49
1899-2226
2353-4869

Pojawia się w:

Annales. Etyka w Życiu Gospodarczym

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

Kategoria efektywności wobec współczesnych wymagań definicji i pomiaru
Category of Efficiency to Contemporary Definitions and Measurement Requirements

Autorzy:

Lisiecka, Maria

Powiązania:

https://bibliotekanauki.pl/articles/1828334.pdf

Data publikacji:

2017

Wydawca:

Politechnika Gdańska

Tematy:

category of efficiency
general efficiency of enterprises
efficiency analysis
kategoria efektywności
efektywność ogólna przedsiębiorstw
analiza efektywności

Opis:

Efficiency is an economic category, which is often found not only in economics, but also in a more general way. Due to the popularization of this concept, there are many differences in the way it is defined. There is therefore a need to redefine the notion of efficiency both at the general level and on the basis of economic theories rather than the colloquial meaning of the word. It should be a necessary step in the process of assessing the efficiency of an enterprise, often only limited to financial analysis. There are business sectors relevant to functioning of company and strategic from perspectives whose analysis in current practice is neglected and does not consist into an analysis of the efficiency of the whole enterprise. The purpose of this article is to try to define a new category of efficiency. This should be a necessary preparatory phase of analysis, leading to a global look at efficiency in the context of the whole enterprise, not just its individual areas. The research hypothesis is that, in response to the complexity of the enterprise and the complexity of its assessment, and the widespread use of the notion of efficiency, the extension of the components of the overall efficiency assessment will improve the real assessment of business activity. Methods used in the work are literature studies and critical analysis, simple observation of the Polish enterprise market and intuitive method. The result of the analysis is to organize the definition of efficiency and to introduce a generic, newly defined concept of efficiency that will enable the whole enterprise to be covered and thus bring researchers closer to the analysis of the actual level of overall effectiveness.
Efektywność jest kategorią ekonomiczną w trwały sposób związana z ekonomią, spotykaną często nie tylko w ekonomii, ale zdecydowanie powszechniej. W związku z popularyzacją tego pojęcia powstało wiele różnic w sposobie jej definiowania. Istnieje zatem potrzeba redefinicji pojęcia efektywności zarówno na poziomie ogólnym, jak i w oparciu o teorie ekonomiczną, a nie potoczne znaczenie tego słowa. Powinien być to etap konieczny w procesie oceny efektywności przedsiębiorstwa, nazbyt często zawężanej jedynie do analizy finansowej. Istnieją sektory przedsiębiorstwa istotne z jego perspektywy funkcjonalnej i strategicznej, których analiza w obecnej praktyce jest pomijana lub zaniedbywana i nie składa się na analizę efektywności całego przedsiębiorstwa. Celem artykułu jest próba nowego zdefiniowania kategorii efektywności. Powinien być to niezbędny etap przygotowawczy analizy, prowadzący do globalnego spojrzenia na efektywności w kontekście całego przedsiębiorstwa, nie tylko poszczególnych jego obszarów. Hipoteza badawcza brzmi: w odpowiedzi na rozbudowanie kompleksowości przedsiębiorstw i złożoności ich oceny oraz zbyt powszechne użycie pojęcia efektywności, rozszerzenie elementów tworzących ogólną ocenę efektywności poprawi realną ocenę aktywności przedsiębiorstw. Metody użyte w pracy to studia literaturowe i analiza krytyczna, obserwacja prosta rynku przedsiębiorstw w Polsce oraz metoda intuicyjna. Wynikiem przeprowadzonej analizy jest uporządkowanie definicji efektywności oraz wprowadzenie ogólnego, nowo zdefiniowanego pojęcia efektywności, które umożliwi objęcie całości przedsiębiorstwa i tym samym zbliży badaczy do analizy faktycznego poziomu efektywności ogólnej.

Źródło:

Przedsiębiorstwo we współczesnej gospodarce - teoria i praktyka; 2017, 3, 22; 249-262
2084-6495

Pojawia się w:

Przedsiębiorstwo we współczesnej gospodarce - teoria i praktyka

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

The energy efficiency gap in Turkish maritime transportation

Autorzy:

Konur, Olgun
Bayraktar, Murat
Pamik, Murat
Kuleyin, Barış
Nuran, Mustafa

Powiązania:

https://bibliotekanauki.pl/articles/259437.pdf

Data publikacji:

2019

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

energy efficiency gap
maritime transportation
energy efficiency technologies
carbon emission

Opis:

The Turkish Merchant Shipping Industry has recently witnessed an increasing awareness of the importance to minimize environmental pollution and fuel oil consumption. Together with certain non-governmental organizations and media concerns about environmental protection, the International Maritime Organization (IMO) has been strict on controlling undesirable effects on the environment and, consequently, forcing shipping companies to minimize their emissions. Besides, today’s highly advanced technology companies over the world have developed various innovative systems that can be utilized to minimize carbon emission, thus giving assurance to relevant investors that their investments are most likely to turn out well with a considerable financial gain in the short or long term. Despite all such favorable developments, in a general look, shipping companies seem reluctant in making use of technologies providing efficiency in energy consumption. This reluctance has eventually brought about the term “Energy Efficiency Gap”. This research conducts a questionnaire, created by Acciaro et al. [1], among the shipping companies in Turkey. 20 respondent companies, who represent 26 percent of the Turkish owned merchant marine fleet of over 1000 gross tonnage in terms of deadweight cargo capacity, participated in the research. The Pearson correlation analysis was used, and interpretations were made according to the obtained statistical values. The aim of the research was to identify reasons and points restraining the use of new technologies regarding energy efficiency, as well as to develop proposals for the innovators in this field about how to overcome this handicap concerning technical and managerial aspects of gaining energy efficiency.

Źródło:

Polish Maritime Research; 2019, 3; 98-106
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Assessing the Intangibles: Socioeconomic Benefits of Improving Energy Efficiency
Ocena wartości niematerialnych: społeczno-ekonomiczne korzyści z poprawy efektywności energetycznej

Autorzy:

Bartoszewicz-Burczy, H.
Baumgartner, R. J.
Fawcett, T.
Fritz, M. M. C.
Killip, G.
Valladolid, T.
Violi, C.

Powiązania:

https://bibliotekanauki.pl/articles/952958.pdf

Data publikacji:

2018

Wydawca:

ENERGA

Tematy:

efektywność energetyczna
korzyść
energy efficiency
multi benefits of energy efficiency

Opis:

Poprawa efektywności energetycznej może przynieść wiele korzyści dla gospodarki i społeczeństwa. Jednak programy efektywności energetycznej są często oceniane jedynie na podstawie oszczędności energii bez uwzględnienia niematerialnych korzyści społeczno-ekonomicznych. W rezultacie całkowita wartość korzyści efektywności energetycznej w gospodarkach krajowych i w ujęciu globalnym jest znacząco zaniżona. Zasadniczym celem artykułu jest wskazanie i – na podstawie przedstawionych studiów przypadku – analiza wielorakich korzyści wynikających z poprawy efektywności energetycznej.
Poprawa efektywności energetycznej może przynieść wiele korzyści dla gospodarki i społeczeństwa. Jednak programy efektywności energetycznej są często oceniane jedynie na podstawie oszczędności energii bez uwzględnienia niematerialnych korzyści społeczno-ekonomicznych. W rezultacie całkowita wartość korzyści efektywności energetycznej w gospodarkach krajowych i w ujęciu globalnym jest znacząco zaniżona. Zasadniczym celem artykułu jest wskazanie i – na podstawie przedstawionych studiów przypadku – analiza wielorakich korzyści wynikających z poprawy efektywności energetycznej.

Źródło:

Acta Energetica; 2018, 4; 99-104
2300-3022

Pojawia się w:

Acta Energetica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

The energy efficiency gap in Turkish maritime transportation

Autorzy:

Konur, Olgun
Bayraktar, Murat
Pamik, Murat
Kuleyin, Barış
Nuran, Mustafa

Powiązania:

https://bibliotekanauki.pl/articles/962688.pdf

Data publikacji:

2019

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

energy efficiency technologies
carbon emission
energy efficiency gap
maritime transportation

Opis:

The Turkish Merchant Shipping Industry has recently witnessed an increasing awareness of the importance to minimize environmental pollution and fuel oil consumption. Together with certain non-governmental organizations and media concerns about environmental protection, the International Maritime Organization (IMO) has been strict on controlling undesirable effects on the environment and, consequently, forcing shipping companies to minimize their emissions. Besides, today’s highly advanced technology companies over the world have developed various innovative systems that can be utilized to minimize carbon emission, thus giving assurance to relevant investors that their investments are most likely to turn out well with a considerable financial gain in the short or long term. Despite all such favorable developments, in a general look, shipping companies seem reluctant in making use of technologies providing efficiency in energy consumption. This reluctance has eventually brought about the term “Energy Efficiency Gap”. This research conducts a questionnaire, created by Acciaro et al. [1], among the shipping companies in Turkey. 20 respondent companies, who represent 26 percent of the Turkish owned merchant marine fleet of over 1000 gross tonnage in terms of deadweight cargo capacity, participated in the research. The Pearson correlation analysis was used, and interpretations were made according to the obtained statistical values. The aim of the research was to identify reasons and points restraining the use of new technologies regarding energy efficiency, as well as to develop proposals for the innovators in this field about how to overcome this handicap concerning technical and managerial aspects of gaining energy efficiency.

Źródło:

Polish Maritime Research; 2019, 3; 98-106
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Efficiency Container Ports in Brazil: A DEA and FDH Approach

Autorzy:

Cabral, Alexandra Maria Rios
Ramos, Francisco S.

Powiązania:

https://bibliotekanauki.pl/articles/14476432.pdf

Data publikacji:

2018-03-15

Wydawca:

Wyższa Szkoła Bankowa we Wrocławiu

Tematy:

DEA
FDH
container terminal
Brazilian ports
port efficiency
technical efficiency

Opis:

Aim: This study aims to evaluate the technical efficiency of 44 Brazilian port terminals that handled containers in 2016. The evaluation will first proceed by identifying the main benchmarks. It will then provide an analysis of variables that may have an effect on technical efficiency as well as the nature of their relationship with the latter--namely: container movement and specialized terminals.   Design / Research methods: In this work we apply the techniques of Data Envelopment Analysis and Free Disposal Hull. Output-oriented models were constructed, using three inputs - berth depth, berth length and number of berths, and three outputs - number of containers handled, medium board measured in container handled per hour of mooring, and medium consignment rate measured in container throughput per ship.   Conclusions / findings: The main results show that half of the terminals have an inefficient infrastructure, with capacity larger than necessary to meet current demand for transportation of containers. In addition, there is a strong relationship between the efficiency and size of a terminal port and between the efficiency and degree of specialization. Moreover, the private use terminal of (TUP) Itacal and public quay OCRIM can serve as benchmarks for most of the terminals.   Originality / value of the article: Relatively few works in the literature tried to measure technical efficiency for developing countries. Besides that, none of the works found regarding Brazilian ports have shown the scenario after promulgation of the Port’s Law in 2013, and only a few used container cargo as focus. This article is of interest for scientists of the sector, exporters/importers, and Brazilian Government officers interested in observing the effects of public policies aimed at the sector. We also suggest future work concerning the sector's improvements which can follow from our findings. 

Źródło:

Central European Review of Economics and Management; 2018, 2, 1; 43-64
2543-9472

Pojawia się w:

Central European Review of Economics and Management

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Energy efficiency – selected thermo-ecological problems

Autorzy:

Ziębik, Andrzej
Stanek, Wojciech

Powiązania:

https://bibliotekanauki.pl/articles/239928.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

energy efficiency
system analysis
exergy
thermo-ecology
energy ecological
efficiency

Opis:

The paper is devoted to some problems connected with last modification of EU directive on energy efficiency, viz.: free choice of the measure concerning the improvement of energy efficiency, i.e. final or primary energy consumption, corresponding energy savings or energy-consumption index; however without cumulative consumption or cumulative savings of primary energy. In EU directive it has been stressed the importance of measurements systems (reliable measurement information); but has not been recommended any advanced validation of measurements results, nor energy auditing or algorithms of calculating the energy savings due to improvement of energy efficiency concerning large industrial plants. Evaluation of complex buildings should be realized by means of the system method (input-output analysis). The separate problem is devoted to application of thermo-ecological approach in the analysis of complete results of improving the energy efficiency. Human activity is connected with the depletion of nonrenewable resources, including primary energy, due to not only production of consumer goods but also the necessity of compensating the unfavourable effects of harmful emissions from energy-technological processes. Therefore the index of energy-ecological efficiency has been proposed as the most competent evaluation of improvement energy efficiency of production processes and systems.

Źródło:

Archives of Thermodynamics; 2020, 41, 2; 277-299
1231-0956
2083-6023

Pojawia się w:

Archives of Thermodynamics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Structure of technical efficiency of insurers in the life insurance industry in Poland

Autorzy:

Ortyński, Kazimierz
Wołoszyn, Jacek

Powiązania:

https://bibliotekanauki.pl/articles/16729747.pdf

Data publikacji:

2022

Wydawca:

Instytut Naukowo-Wydawniczy "SPATIUM"

Tematy:

life insurance market
cost efficiency
profit efficiency
stochastic frontier analysis

Opis:

The primary objective of the article was to examine the level and efficiency structure of insurance companies on life insurance market  in Poland. The study presents critical analysis of the insurance literature relating to technical efficiency of insurers, i.e. methods of estimating efficiency, the form of the efficiency  frontier  model, the choice of production factors and insurance production. The study used the methods of mathematical and econometric modelling in SFA  method. The results the technical efficiency study for 22 life insurance companies for a period between 2011-2020 using the SFA method, showed high average cost efficiency of insurers (0.9140) and lower profit efficiency (0. 8565). It was confirmed that a group of large companies achieved higher cost efficiency than the remaining companies, suggesting that large companies benefited from the scale of production.  In contrast, higher average profit efficiency was recorded for the remaining companies.

Źródło:

Central European Review of Economics & Finance; 2022, 39, 4; 24-38
2082-8500
2083-4314

Pojawia się w:

Central European Review of Economics & Finance

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Efficiency of insurance companies in the Czech Republic and Poland

Autorzy:

Grmanová, Eva
Pukala, Ryszard

Powiązania:

https://bibliotekanauki.pl/articles/18797289.pdf

Data publikacji:

2018

Wydawca:

Instytut Badań Gospodarczych

Tematy:

efficiency
efficiency score
insurance companies
Data Envelopment Analysis
Tobit analysis

Opis:

Research background: The insurance market is an important part of the financial system. The international concept of insurance operations brings certainty and helps to balance the economic results. Purpose of the article: The aim of the paper is to compare  the efficiency of life insurance of commercial insurance companies in the Czech Republic and Poland using the Data Envelopment Analysis model (DEA). Methods: The methods used in the paper are descriptive statistics, DEA model and Tobit regression model. DEA models are nonparametric quantitative models for efficiency assessment. They use linear programming to transform multiple inputs into multiple outputs. The efficiency of the subjects analyzed is assessed based on the efficiency scores.  Findings & Value added: The subject of our analysis was 17 commercial insurance companies in the Czech Republic and 26 commercial insurance companies in Poland. Ten insurance companies were efficient on the common Czech-Polish insurance market. The share of efficient insurance companies was approximately equal. The arithmetic mean of the efficiency scores was higher in Poland than in the Czech Republic. The variability of the efficiency scores of Czech insurance companies was greater than the variability of the efficiency scores of Polish insurance companies. The  correlations with efficiency score as the dependent variable and with market share as the independent variable of Tobit regression were very low.

Źródło:

Oeconomia Copernicana; 2018, 9, 1; 71-85
2083-1277

Pojawia się w:

Oeconomia Copernicana

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

The energy efficiency gap in Turkish maritime transportation

Autorzy:

Konur, Olgun
Bayraktar, Murat
Pamik, Murat
Kuleyin, Barış
Nuran, Mustafa

Powiązania:

https://bibliotekanauki.pl/articles/962694.pdf

Data publikacji:

2019

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

energy efficiency gap
maritime transportation
energy efficiency technologies
carbon emission

Opis:

The Turkish Merchant Shipping Industry has recently witnessed an increasing awareness of the importance to minimize environmental pollution and fuel oil consumption. Together with certain non-governmental organizations and media concerns about environmental protection, the International Maritime Organization (IMO) has been strict on controlling undesirable effects on the environment and, consequently, forcing shipping companies to minimize their emissions. Besides, today’s highly advanced technology companies over the world have developed various innovative systems that can be utilized to minimize carbon emission, thus giving assurance to relevant investors that their investments are most likely to turn out well with a considerable financial gain in the short or long term. Despite all such favorable developments, in a general look, shipping companies seem reluctant in making use of technologies providing efficiency in energy consumption. This reluctance has eventually brought about the term “Energy Efficiency Gap”. This research conducts a questionnaire, created by Acciaro et al. [1], among the shipping companies in Turkey. 20 respondent companies, who represent 26 percent of the Turkish owned merchant marine fleet of over 1000 gross tonnage in terms of deadweight cargo capacity, participated in the research. The Pearson correlation analysis was used, and interpretations were made according to the obtained statistical values. The aim of the research was to identify reasons and points restraining the use of new technologies regarding energy efficiency, as well as to develop proposals for the innovators in this field about how to overcome this handicap concerning technical and managerial aspects of gaining energy efficiency.

Źródło:

Polish Maritime Research; 2019, 3; 98-106
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Badania sprawności hydraulicznej w mieszalniku z dwoma mieszadłami na wspólnym wale
Study on the pumping and circulation efficiency in a dual agitated vessel

Autorzy:

Duda, A.
Kamieński, J.
Talaga, J.

Powiązania:

https://bibliotekanauki.pl/articles/2070039.pdf

Data publikacji:

2009

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

mieszalnik dwustopniowy
sprawność hydrauliczna
dual impeller
pumping efficiency
circulation efficiency

Opis:

W pracy przedstawiono wyniki obliczeń sprawności hydraulicznej dla różnych układów dwóch mieszadeł na wspólnym wale, wyznaczonej w oparciu o wydajność pompowania oraz wydajność przepływu cyrku-lacyjnego w mieszalniku. Zbadano wpływ odległości pomiędzy mieszadłami na wartość sprawności hydraulicznej w mieszalniku dwustopniowym.
Results of the pumping and the circulation efficiency for different impeller configurations in a dual agitated vessel are presented in the paper. An influence of impellers' spacing on the pumping and circulation efficiency was examined.

Źródło:

Inżynieria i Aparatura Chemiczna; 2009, 1; 92-93
0368-0827

Pojawia się w:

Inżynieria i Aparatura Chemiczna

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Efektywność energetyczna firmy - wymogiem rynku i czasów w których żyjemy
Energy efficiency of a company - a requirement of the market and times in which we live

Autorzy:

Zaręba, K.

Powiązania:

https://bibliotekanauki.pl/articles/272189.pdf

Data publikacji:

2009

Wydawca:

Górnośląska Wyższa Szkoła Pedagogiczna im. Kardynała Augusta Hlonda

Tematy:

efektywność energetyczna
energia
firma
wydajność
energy efficiency
energy
company
efficiency

Opis:

W artykule przedstawiono uwarunkowania i działania prowadzące do podniesienia efektywności energetycznej w firmie, pokreślono znaczenie edukacji i możliwości pokonywania ograniczeń. Uwypuklono ekonomiczny i ekologiczny aspekt wydajności energetycznej. Wskazano możliwości zastosowania matematycznych metod jej interpretacji. Podkreślono, że efektywność energetyczna jest kluczowym elementem niezbędnym do osiągnięcia klimatyczno - energetycznych celów Unii Europejskiej, w tym również Polski.
The article presents the overall frame and policies aimed at improving the energy efficiency in companies; the importance of education and the environmental aspect of energy efficiency have been stressed. The potential for applying mathematical methods for efficiency inter-pretation has been presented. Energy efficiency has been underlined as the key element of achieving the climatic and energy objectives in Poland and the European Union.

Źródło:

Problemy Ekologii; 2009, R. 13, nr 2, 2; 83-87
1427-3381

Pojawia się w:

Problemy Ekologii

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Input Use Efficiency in Operational and Maintenance Management of Small-Pumping Scale Irrigation Systems in Red River Delta, Vietnam

Autorzy:

Dinh, Dao Van
Nguyen, Phong Tung
Tran, Dat Van
Mukheibir, Pierre
Ton, Au Nu Hai

Powiązania:

https://bibliotekanauki.pl/articles/2086427.pdf

Data publikacji:

2022

Wydawca:

Polskie Towarzystwo Inżynierii Ekologicznej

Tematy:

technical efficiency
scale efficiency
irrigation system
DEA
data envelopment analysis

Opis:

In the Red River Delta (RRD) of Vietnam, small-pumping systems are one of main systems for paddy irrigation. It is imperative to analyze the operation and maintenance performance of irrigation systems by using the input factors when applying pricing mechanisms in the irrigation sector in Vietnam. In this study, based on the data of 48 irrigation systems managed by teams under irrigation companies, the non-parametric program, Data Envelopment Analysis, was used to measure the technical efficiency and scale efficiency for small-pumping scale irrigation systems in the Red River Delta. The seven input factors were the annual direct and indirect labor, materials, electricity, recurrent maintenance, overhead, and depreciation cost, and an output factor was the paddy areas irrigated by the systems. The results demonstrated that the average technical efficiency scores under constant returns to scale and variable returns to scale were 0.924 and 0.946, respectively. Thus, the wasted inputs were suggested to be 7.6% and 5.4% of the current input level, respectively. The average scale efficiency score was 0.977 and therefore, some 72.9% of the Decision-Making Units should adjust their input scales to achieve the efficiency in input factors.

Źródło:

Journal of Ecological Engineering; 2022, 23, 5; 207--215
2299-8993

Pojawia się w:

Journal of Ecological Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Efficiency frontier on Japanese banking system

Autorzy:

Ivan, Ionut Cristian

Powiązania:

https://bibliotekanauki.pl/articles/646300.pdf

Data publikacji:

2015-12

Wydawca:

Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego

Tematy:

data envelopment analysis
free disposability hull
efficiency frontier
distance
financial efficiency
super efficiency
C14
D24

Opis:

Since the emergence of the efficiency frontier techniques, a series of comparisons between the methods that led to the resultant efficiency has been presented. In this paper, data from 99 Japanese banks are used in order to prove the applicability of efficiency frontier analysis on the East-Asian financial system and to reveal the differences between inter and intra-regional banks, showing the effect of the present financial crisis on the efficiency of the studied banks. DEA and FDH are used to determine the technical and scale efficiency of the analyzed banks and also it compares fully efficient banks by ranking them through the super-efficiency notion.

Źródło:

Ekonomia Międzynarodowa; 2015, 012
2082-4440
2300-6005

Pojawia się w:

Ekonomia Międzynarodowa

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Wykorzystanie metody DEA do pomiaru efektywności liceów ogólnokształcących w Szczecinie
The use of the DEA method to measure the efficiency of high schools in Szczecin

Autorzy:

Brzezicki, Łukasz

Powiązania:

https://bibliotekanauki.pl/articles/19478698.pdf

Data publikacji:

2020-12-15

Wydawca:

Uniwersytet Warszawski. Wydawnictwo Naukowe Wydziału Zarządzania

Tematy:

efektywność krzyżowa
efektywność
krzyżowa efektywność gry
liceum
szkolnictwo
cross efficiency
education
efficiency
game cross efficiency
high school

Opis:

W artykule dokonano pomiaru efektywności 19 szczecińskich liceów ogólnokształcących w 2018 roku za pomocą dwóch modeli DEA (Data Envelopment Analysis) zorientowanych na wyniki. Wykorzystano model Cross Efficiency (CE) oraz Game Cross Efficiency (GCE) do oszacowania efektywności krzyżowej. Przeanalizowano efektywność techniczną szkół średnich pod względem ilości (liczby uczniów) i jakości (rankingów edukacji). W zależności od wybranego modelu empirycznego za wyniki przyjęto liczbę uczniów, absolwentów lub wskaźnik rankingowy i średnią wartość matur. Natomiast za nakłady w obu przypadkach uwzględniono liczbę pracowników pedagogicznych. Najniższą efektywnością we wszystkich obszarach – zarówno ilościowych, jak i jakościowych – charakteryzowało się LO Mistrzostwa Sportowego w CMS. Najwyższe wartości efektywności w zakresie ilościowej charakterystyki kształcenia uzyskało I LO, a odnośnie do jakościowego aspektu edukacji – XIII LO. Szkoły, które zdecydowałyby się na strategie braku współpracy z innymi jednostkami, uzyskałyby wyższy poziom efektywności niż w przypadku współpracy wszystkich ośrodków edukacyjnych średnio o 7 p. proc w aspekcie ilościowym i 3 p. proc w jakościowym.
The article measures the efficiency of 19 high schools in Szczecin in 2018 using two DEA (Data Envelopment Analysis) models focused on results. The Cross Efficiency model (CE) and Game Cross Efficiency model (GCE) were used to estimate cross-flow efficiency. The technical efficiency of high schools was analysed in terms of quantity (number of students) and quality (education rankings). Depending on the empirical model chosen, the number of students, graduates or ranking index and the average value of high schools baccalaureate were assumed as the results. In both cases, the number of pedagogical employees was taken into account for the inputs. The lowest efficiency in the areas, both in terms of quantity and quality, was observed in the case of LO Sport Championships in CMS. The highest values of efficiency in terms of the quantitative characteristics of education were achieved by the 1st High School, and as regards the qualitative aspect of education at the XIII High School. Schools that opted for non-cooperation strategies with other units would achieve a higher level of efficiency than in the case of cooperation of all educational institutions by 7 p.p. on average in terms of quantity and 3 p.p. in terms of quality.

Źródło:

Studia i Materiały; 2020, 2(33); 18-31
1733-9758

Pojawia się w:

Studia i Materiały

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Impact of tractor wheels on physical properties of different soil types and the irrigation efficiency of the furrow irrigation method

Autorzy:

Vistro, Rahim Bux
Talpur, Mashooque Ali
Shaikh, Irfan Ahmed
Mangrio, Munir Ahmed

Powiązania:

https://bibliotekanauki.pl/articles/2073733.pdf

Data publikacji:

2022

Wydawca:

Instytut Technologiczno-Przyrodniczy

Tematy:

furrow storage efficiency
ridge storage efficiency
irrigation methods
soil physical properties
tractor wheel trafficking
water use efficiency

Opis:

In furrow irrigation, the maximum lateral movement of water in ridges is more desirable than the vertical downward movement. This can be achieved by compacting the furrows. Thus, the study examines the impact on furrow soil compaction by tractor wheel trafficking during mechanical operations in the different soil types. In this experiment, the three-wheel tractor compaction includes: 1) control (no soil compaction), 2) compaction through 3-wheel tractor passes, and 3) compaction through 6-wheel passes under three different soil textural classes such as: clay loam, silty clay loam and silty loam soils. The impact of various treatments on clay loam, silty clay loam, and silty loam under 3- and 6-wheel passes showed increased bulk density (7–12%), field capacity (9–19%), ridge storage efficiency (35–38%), water use efficiency (16–20.5%) and decreased soil porosity (7–16%), infiltration (8–20%), and furrow storage efficiency (28–41%) over the control. This study shows comparable results of 6-passes with other studies in which more than 6-passes were used to compact the soil. This study suggested that farmers can maximise water use efficiency by compacting their furrows using 6-passes tractor trafficking.

Źródło:

Journal of Water and Land Development; 2022, 52; 166--171
1429-7426
2083-4535

Pojawia się w:

Journal of Water and Land Development

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

An economic approach to broiler production. A case study from Hungary
Ekonomiczne podejście do produkcji brojlerów. Studium przypadku z Węgier

Autorzy:

Szollosi, L.
Szucs, I.

Powiązania:

https://bibliotekanauki.pl/articles/863549.pdf

Data publikacji:

2014

Wydawca:

The Polish Association of Agricultural and Agribusiness Economists

Tematy:

broiler chicken
economic efficiency
technical efficiency
animal production
model calculation
cost
benefit
production level
European production efficiency factor
EPEF zob.European production efficiency factor
Hungary

Opis:

. The general objective of this study is to present the economic situation of Hungarian broiler production. A deterministic model was constructed to investigate the role of technical efficiency on profitability. As the results demonstrate, in current economic conditions broiler production can be profitable if the European Production Efficiency Factor (EPEF) is above 300-310. A lower level of technology, cheaper feed and chicks in addition to their weaker quality deteriorates the technical efficiency of production, which results in poor economic indicators. Therefore, it is not worth saving on either the level of technology or the quality of chicks or feed. Thus, the key purpose of future developments should be: increasing efficiency.
Główny celem badań było przedstawienie ekonomicznej sytuacji chowu brojlerów na Węgrzech. Aby zbadać wpływ technicznej wydajności na rentowność stworzono deterministyczny model. Jak wskazują wyniki, przy obecnych warunkach ekonomicznych chów brojlerów może być rentowny, jeśli europejski czynnik wydajności produkcji (EPEF) utrzymuje się powyżej 300-310. Niższy poziom technologiczny, tańsza pasza i kurczęta oraz ich niższa jakość obniża techniczną wydajność produkcji, która skutkuje niskimi wskaźnikami ekonomicznymi. Dlatego nie warto oszczędzać na poziomie technologicznym i na jakości kurcząt lub paszy. W związku z tym kluczowym celem rozwoju w przyszłości powinno być zwiększenie wydajności.

Źródło:

Roczniki Naukowe Stowarzyszenia Ekonomistów Rolnictwa i Agrobiznesu; 2014, 16, 3
1508-3535
2450-7296

Pojawia się w:

Roczniki Naukowe Stowarzyszenia Ekonomistów Rolnictwa i Agrobiznesu

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Wskaźnik eksploatacyjnej efektywności energetycznej jako element planowania przebiegu rejsu jednostki rybackiej
Energy efficiency operational indicator as an element for planning the trip of fishin vessel

Autorzy:

Głowacki, B.

Powiązania:

https://bibliotekanauki.pl/articles/112592.pdf

Data publikacji:

2017

Wydawca:

STE GROUP

Tematy:

zarządzanie efektywnością energetyczną
monitorowanie efektywności energetycznej
audyt efektywności energetycznej
energy efficiency management
energy efficiency monitoring
energy efficiency audits

Opis:

Wykorzystanie wskaźnika eksploatacyjnej efektywności energetycznej EEOI do analizy efektywności eksploatacyjnej i planowania przebiegu rejsu jednostek rybackich to rozwiązanie innowacyjne. W artykule przedstawiono autorskie oprogramowania dedykowanego dla tego typu jednostek, pozwalające na zbieranie w trybie on-line danych opisujących przebieg rejsu i pojedynczych działań wykonywanych przez jednostkę. Odpowiednia interpretacja i korelacja parametrów techniczno-eksploatacyjnych z wykorzystaniem programu komputerowego, umożliwi uzyskanie danych pozwalających na ocenę efektywności eksploatacyjnej, z uwzględnieniem stanu technicznego jednostki w dowolnych warunkach eksploatacyjnych. Pozwoli również na planowanie rejsu.
The use of the energy efficiency operational index to analyse the operational efficiency and planning of fishing vessels trips is an innovative solution. This article presents authoring software dedicated to this type of vessel, allowing online collection of data describing the course of the trip and individual activities performed by the fishing vessel. Correct interpretation and correlation of technical and operational parameters with the use of this program will allow to obtain data allowing to evaluate the energy efficiency, taking into account technical condition of the unit under any operating conditions. It will also allow you to plan your trip.

Źródło:

Systemy Wspomagania w Inżynierii Produkcji; 2017, 6, 6; 91-101
2391-9361

Pojawia się w:

Systemy Wspomagania w Inżynierii Produkcji

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

COMPARATIVE ANALYSIS OF ECONOMIC EFFICIENCY OF POLISH AND GERMAN LISTED COMPANIES

Autorzy:

Sajnóg, Artur

Powiązania:

https://bibliotekanauki.pl/articles/489037.pdf

Data publikacji:

2015

Wydawca:

Instytut Badań Gospodarczych

Tematy:

efficiency
measure of efficiency
DEA
Polish and German joint-stock companies

Opis:

The main subject of theoretical-empirical study presented in this paper is economic efficiency of companies listed on the Polish and German capital market. The discussed research problem was investigated in the form of a comparative analysis and realized in two parts. The discussion presented in the first part depicts mainly theoretical reflections on the essence and assessment measures of companies’ economic efficiency. The second part presents the results of a comparative empirical research on economic efficiency of the companies listed on the Warsaw Stock Exchange and included in the WIG30 index as well as the companies listed on the Frankfurt Stock Exchange, which belong to the DAX index. The research period comprises years between 2004-2013. A comparative analysis of economic efficiency of the companies was conducted using a traditional ratio analysis and the nonparametric DEA method. The results of the empirical research confirm that German companies achieved significantly higher values of basic economic categories in the analysed decade, financial results in particular; however, their generated profits did not reflect in higher values of profitability ratios. Polish companies performed much better as they also showed higher efficiency from the DEA’s point of view.

Źródło:

Oeconomia Copernicana; 2015, 6, 2; 67-87
2083-1277

Pojawia się w:

Oeconomia Copernicana

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Exergetic performance analysis of solar air heater with inverted L-shape ribs as roughness element

Autorzy:

Chaudhari, Manmohan
Sharma, Sohan Lal
Debbarma, Ajoy

Powiązania:

https://bibliotekanauki.pl/articles/27312231.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

solar air heater
heat transfer
exergy loss
exergy efficiency
thermal efficiency

Opis:

Improvement in the exegetic efficiency of a solar air heater (SAH) can be done by enhancing the rate of heat transfer. In this work, the exergetic efficiency optimization of an artificially roughened solar air heater having an inverted L-shape rib has been performed. The numerical analysis of the exergetic performance of the solar air heater was carried out at a constant heat flux of 1000 W/m2 . The study was conducted to investigate the effect of different relative roughness pitch (7.14–17.86) on the exergy losses, under the Reynolds number range of 3000 to 18 000. The roughness parameter of this geometry has been optimized and found to be among functional operating parameters like average solar intensity and temperature rise across the collector. The optimized value of relative roughness pitch is 17.86 at the isolation of 1000 W/m2 , and the parameter of temperature rise ranges from 0.005 to 0.04.

Źródło:

Archives of Thermodynamics; 2023, 44, 3; 241--267
1231-0956
2083-6023

Pojawia się w:

Archives of Thermodynamics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Evaluating an inland waterway cargo vessel’s energy efficiency indices

Autorzy:

Kalajdžić, Milan
Vasilev, Matija
Momčilović, Nikola

Powiązania:

https://bibliotekanauki.pl/articles/32898591.pdf

Data publikacji:

2022

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

inland vessels
energy efficiency
energy efficiency of inland vessels
EEXI
EEDI

Opis:

Although the International Maritime Organization (IMO) introduced the energy efficiency requirements for ships more than a decade ago, to date, inland navigation has not been affected by corresponding regulations at all. Therefore, inland waterway vessels are left with no mandatory requirements that could push their technology into more energy efficient design. Fortunately, there are certain pioneering attempts to define energy efficiency criteria for inland vessels. This paper tries to gather and provide a review of such methods. Moreover, a typical Danube cargo inland vessel’s data are used to evaluate their current energy efficiency levels with respect to provisional criteria. Consequently, two methods are found and used here. They are both based on IMO’s energy efficiency concept but modified for the inland waterway vessels. The methods delivered a significant difference in applicability and were difficult to compare. Moreover, shallow and deep-water effects are explored in the same regard but provided unsound conclusions. The final results displayed discrepancies in energy efficiency levels for the same vessels and so the methodology should be improved and harmonised, if it is to be introduced as mandatory for inland waterway vessels. The analysis provided a glimpse into the current condition of the traditional design of the Danube inland fleet, with respect to the emerging energy efficiency policies.

Źródło:

Polish Maritime Research; 2022, 2; 27-34
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

Efficiency of State Foreign Policy. Introduction to Definition Process
Efektywność polityki zagranicznej państwa. Wstęp do definicji

Autorzy:

Piechowiak-Lamparska, Joanna

Powiązania:

https://bibliotekanauki.pl/articles/1953193.pdf

Data publikacji:

2015-12-31

Wydawca:

Wydawnictwo Adam Marszałek

Tematy:

efficiency of state foreign policy
theoretical category
definition process
efficiency
effectiveness

Opis:

The aim of this article is to present the definition of efficiency of state foreign policy. As a result of theoretical research, the definition of efficiency that views efficiency of state foreign policy as the relationship between the intended objectives and the achieved effects, taking into account the resources used and measures adopted in the pursuit of these objectives. It is the sum of the component efficiencies in achieving the country’s raison d’etat, its long-term and short-term objectives and ad hoc goals, and finally the level of state activity in the international arena
Celem artykułu jest wyznaczenie definicji kategorii efektywności polityki zagranicznej państwa. W wyniku badań teoretycznych została przyjęta definicja ujmująca efektywność polityki zagranicznej państwa jako zależność pomiędzy zamierzonymi celami a osiągniętymi efektami przy uwzględnieniu wykorzystanych zasobów i środków. Jest ona sumą efektywności realizacji racji stanu, realizacji celów długoterminowych, realizacji celów krótkoterminowych, realizacji celów doraźnych oraz poziomu aktywności państwa na arenie międzynarodowej.

Źródło:

Athenaeum. Polskie Studia Politologiczne; 2015, 48; 226-243
1505-2192

Pojawia się w:

Athenaeum. Polskie Studia Politologiczne

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Energy Efficiency Design Index as a new criterion in ship design

Autorzy:

Szelangiewicz, T.
Żelazny, K.

Powiązania:

https://bibliotekanauki.pl/articles/359076.pdf

Data publikacji:

2012

Wydawca:

Akademia Morska w Szczecinie. Wydawnictwo AMSz

Tematy:

Energy Efficiency Design Index
International Energy Efficiency Certificate for the ship

Opis:

Since 2013 Energy Efficiency Design Index (EEDI) for new ships will be enforced. Ships meeting the CO2 emission standards will be granted energy certificate required for their exploitation. The paper presents EEDI in the current form, the certification procedure, reduced CO2 emission planned for coming years, as well as potential for further EEDI value reduction.

Źródło:

Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2012, 32 (104) z. 1; 97-101
1733-8670
2392-0378

Pojawia się w:

Zeszyty Naukowe Akademii Morskiej w Szczecinie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

Conceptual Design and Performance Analysis of an Exhaust Gas Waste Heat Recovery System for a 10000TEU Container Ship

Autorzy:

Ma, Zheshu
Yang, Dong
Guo, Qiang

Powiązania:

https://bibliotekanauki.pl/articles/259008.pdf

Data publikacji:

2012

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

exergy efficiency
marine diesel engine
thermal efficiency
waste heat recovery system

Opis:

According to operation characteristics of the main engine 9K98ME-C7, a combined turbines-exhaust gas waste heat recovery system is proposed to recover waste heat and increase system energy efficiency. Thermodynamic models based on the first thermodynamic law and the second thermodynamic law are formulated. The superheated steam yield, the total electric power yield, the first thermodynamic law efficiency, the exergy efficiency at different exhaust gas boiler working pressure, and the variation of the exergy efficiency under different feed water temperature and different steam turbine back pressure are analyzed. Thermodynamic results indicate that the most appropriate exhaust gas boiler pressure is 0.8MPa for studied main engine and the total thermal efficiency with combined turbines arrangement has climbed up to 53.8% from 48.5%.

Źródło:

Polish Maritime Research; 2012, 2; 31-38
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

Silnik napędzający oszczędność
The Motor Propelling the Economy

Autorzy:

Hałoń, R.
Dukalski, P.
Poprawski, W.

Powiązania:

https://bibliotekanauki.pl/articles/1368424.pdf

Data publikacji:

2013

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel

Tematy:

silniki indukcyjne
normy sprawności
energooszczędność
induction motors
efficiency standards
energy efficiency

Opis:

The article concerns the description of new standards of efficiency motors that are currently introduced into European market. The authors describe the norms which create new standards and economic aspects of the use of energy efficient motors because of the amount of energy savings and CO2 emissions to the atmosphere. Part of the article concerns the steps taken by the TAMEL SA to develop and offer the European market in the future efficiency class IE3 Premium and Super Premium IE4 motors.
Artykuł dotyczy opisu nowych standardów sprawności silników indukcyjnych, które są aktualnie wprowadzane na rynek europejski. Autorzy opisują normy określające nowe standardy oraz aspekty ekonomiczne stosowania silników energooszczędnych z uwagi na ilość zaoszczędzonej energii oraz emisji CO2 do atmosfery. Część artykułu dotyczy kroków podjętych przez TAMEL S.A. w celu opracowania oraz zaoferowania w przyszłości rynkowi europejskiemu silników klasy sprawności Premium IE3 oraz Super Premium IE4.

Źródło:

Maszyny Elektryczne: zeszyty problemowe; 2013, 2, 99; 191-197
0239-3646
2084-5618

Pojawia się w:

Maszyny Elektryczne: zeszyty problemowe

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 49.

Tytuł:

DETERMINANTS OF TECHNICAL EFFICIENCY OF PRODUCTION FACTORS AT FAMILY FARMS

Autorzy:

Roman, Sass,

Powiązania:

https://bibliotekanauki.pl/articles/898181.pdf

Data publikacji:

2019-02-20

Wydawca:

Kujawsko-Pomorska Szkoła Wyższa w Bydgoszczy

Tematy:

technical efficiency of production factors
DEA method
regression calculus
efficiency determinants

Opis:

The main objective of the research was to determine the impact of selected endogenous factors, as well as the amount of subsidies from EU funds on the technical efficiency of production factors in family farms. The research included farms from Bydgoszcz subregion which before pre-accession of Poland to the European Union (1996 -2003) benefited from preferential loans. At the same time, in the years 2004-2011, they kept accounting in the Polish FADN system. Using the regression calculus, the impact of articular factors on the technical efficiency of farms was determined. The structural parameters of linear and non-linear models with many independent variables were estimated. As a result of the conducted analyzes, it was found that they improved efficiency: capital expenditure before and after accession, land area increase before accession, production intensity, increase in equity after accession, asset debt and external costs. However, they worsened efficiency: work expenses, pig stocking, debt of equity, fixed costs as well as additional investment activity and the share of subsidies in income.

Źródło:

Roczniki Ekonomiczne Kujawsko-Pomorskiej Szkoły Wyższej w Bydgoszczy; 2018, -(11); 147-162
1899-9573

Pojawia się w:

Roczniki Ekonomiczne Kujawsko-Pomorskiej Szkoły Wyższej w Bydgoszczy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 50.

Tytuł:

Audyt efektywnościowy czy audyt wykonania zadań w jednostkach sektora finansów publicznych – przegląd literatury krajowej i zagranicznej
Efficiency audit or performance audit in public finance sector entities – national and international literature review

Autorzy:

Ciak, Jolanta
Bednarek, Piotr

Powiązania:

https://bibliotekanauki.pl/articles/1788497.pdf

Data publikacji:

2020

Wydawca:

Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu

Tematy:

efektywność
audyt efektywnościowy
audyt wykonania zadań
efficiency
efficiency audit
performance audit

Opis:

Celem artykułu jest wskazanie podobieństw i różnic w zakresie dwóch kategorii audytu, a mianowicie: audytu efektywnościowego i audytu wykonania zadań. Tradycyjny przegląd literatury ma dać odpowiedź na pytanie: Czy można stosować zamiennie oba pojęcia? Badacze bowiem zajmujący się tą problematyką wskazują na podobne ich rozumienie. Studia literaturowe dostarczają szerokiego spektrum możliwości definiowania i interpretowania efektywności, podkreślając wielowymiarowość omawianego pojęcia. Podobna sytuacja jest w przypadku audytu efektywnościowego i audytu wykonania zadań. Zdaniem autorów artykułu można zastosować znak równości pomiędzy tymi pojęciami, bowiem oba rodzaje audytu oznaczają systematyczne, celowe, zorganizowane i obiektywne badanie działań podejmowanych w ramach jednostek funkcjonujących w sektorze finansów publicznych, wykorzystujące kryterium oszczędności, efektywności i skuteczności.
The aim of the article is to indicate the similarities and differences in terms of two categories of audit, namely: effi ciency audit and performance audit. The review of the literature is to answer the question: Can both concepts be used interchangeably? The more so because researchers dealing with this issue indicate a similar understanding of them. Literature studies indicate a wide spectrum of possibilities of defining and interpreting efficiency, emphasizing the multidimensionality of the concept in question. The situation is similar for the efficiency audit and performance audit. In the opinion of the authors of the article, an equal sign can be used between these concepts, because both types of audit mean systematic, purposeful, organized and objective examination of activities undertaken within entities operating in the public finance sector, using the criterion of economy, efficiency and effectiveness.

Źródło:

Prace Naukowe Uniwersytetu Ekonomicznego we Wrocławiu; 2021, 65, 2; 15-32
1899-3192

Pojawia się w:

Prace Naukowe Uniwersytetu Ekonomicznego we Wrocławiu

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 51.

Tytuł:

The Effectiveness of Real Estate Market Versus Efficiency of Its Participants

Autorzy:

Renigier-Biłozor, Małgorzata
Wiśniewski, Radosław

Powiązania:

https://bibliotekanauki.pl/articles/623843.pdf

Data publikacji:

2012-07-26

Wydawca:

Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego

Tematy:

subject efficiency
rough sets

Opis:

This paper attempts to prove the following hypothesis: the effectiveness of a real estate market may be identified by analysing the effectiveness of its participants. The authors also discuss methods based on the rough set theory which can influence the efficiency and efficacy of market participants, and consequently, the effectiveness of the real estate market and its participants.

Źródło:

European Spatial Research and Policy; 2012, 19, 1
1231-1952
1896-1525

Pojawia się w:

European Spatial Research and Policy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 52.

Tytuł:

The State of Affairs of Transportation and Delivery in Hungary, Sustainability Studies, the Introduction of European Tendencies

Autorzy:

Magda, Róbert
Szűcs, Csaba
Bezzeg, Enikő

Powiązania:

https://bibliotekanauki.pl/articles/504423.pdf

Data publikacji:

2012

Wydawca:

Międzynarodowa Wyższa Szkoła Logistyki i Transportu

Tematy:

Transportation
infrastructure
employment
efficiency

Opis:

Transportation and delivery play a vital role in the economy, an efficient transportation system has a determining role in it. Its importance is far more significant than what the transportation sectors proportionally represent. The ratio of transportation and warehousing, which belongs to the national economy sector H according to Unified Sectoral Clas-sification System of Economic Activities, in the total output of the Hungarian economy in gross added value of the national economy is 5.7%, its share in employment is 5.9%, and about 5% of active enterprises can be found in this sector (2010 data).

Źródło:

Logistics and Transport; 2012, 16, 3; 65-78
1734-2015

Pojawia się w:

Logistics and Transport

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 53.

Tytuł:

AROUND THE CONCEPT OF QUALIFICATIONS AND COMPETENCIES
Wokół pojęć kwalifikacji i kompetencji

Autorzy:

Orczyk, Józef

Powiązania:

https://bibliotekanauki.pl/articles/598911.pdf

Data publikacji:

2009-06-15

Wydawca:

Instytut Pracy i Spraw Socjalnych

Tematy:

COMPETENCIES
ECONOMIC EFFICIENCY
QUALIFICATIONS

Opis:

The presented article is an attempt at depicting the consequences of utilizing human capital theory in defining the mutual relations between the concepts of qualifications and competencies. The concepts play an important role in the process of shaping and using human capital (work potential), where a different understanding of their scope impedes analysis of human capital efficiency. In assuming that, in light of human capital theory, qualifications are outlay on its molding, while competencies are the conditions and effects of utilizing capital by a unique adapting of a worker's personal qualities to job position tasks, it becomes possible to not only analyze the economic efficiency of outlays, but also take into account structural and organizational changes in the performance of work.

Źródło:

Zarządzanie Zasobami Ludzkimi; 2009, 3-4(68-69); 19-32
1641-0874

Pojawia się w:

Zarządzanie Zasobami Ludzkimi

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 54.

Tytuł:

ISEE - Intelligent System of Energy Efficiency

Autorzy:

Ziąbka, Tomasz
Grzebielec, Andrzej
Rusowicz, Artur

Powiązania:

https://bibliotekanauki.pl/articles/132041.pdf

Data publikacji:

2020

Wydawca:

Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.

Tematy:

energy efficiency
control system

Opis:

Increasing energy efficiency is one of the priorities of the European 3x20 climate and enery package. The ISEE system - Intelligent Energy Efficiency Control is a response to the growing interest in energy saving. It is also closely related to energy efficiency and reduction of greenhouse gas emissions. The presented system also allows connecting renewable energy sources to the analyzed facilities. It is intended for a wide range of recipients.

Źródło:

Modern Engineering; 2020, 1; 6-10
2450-5501

Pojawia się w:

Modern Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 55.

Tytuł:

Impact of the geometry accuracy of the cycloidal gear output shaft with pins of the efficiency and vibrations

Autorzy:

Pawelski, Z.
Zdziennicki, Z.
Uszpolewicz, G.
Mitukiewicz, G.
Ormezowski, J.

Powiązania:

https://bibliotekanauki.pl/articles/246972.pdf

Data publikacji:

2018

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

cycloidal gear
efficiency
vibrations

Opis:

Cycloidal gear is characterized by [2]: – Large ratio (up to 171:1) from one stage of reduction, which minimizes the weight and dimensions of the reducer. – Minimizing the centrifugal forces as the only high-speed element is the input shaft with an eccentric bearing. – Minimizing internal clearance due to simultaneous meshing of a large number of teeth. In contrast to gears with involute teeth, 10-50% of teeth are found in cycloidal gears with simultaneous meshing. It depends on the size of the gear and the load. The minimum number of teeth engages when running in bulk. – Low noise and low vibration for large torques and variable speeds. – High efficiency in a wide range of loads, because rolling elements are used in every place responsible for the transfer of torque. – Permissible load up to 500% of the rated torque. All above mention point lead into long-term and trouble-free operation, however the above features require high accuracy. The article described comparison of efficiency, vibration and noise obtained for 3 cycloidal gear modules: 1. Two-disc gear with single rollers for both discs (Chmurawa prototype [1]). 2. Three-disc gearbox with separate rollers for each disc (new idea) with gear components: output shaft with pins, housing with rollers (wheel with internal tooting), and input shaft, made with the manual lathe. 3. The same three-disc gearbox with output shaft with pins made with the CNC. Different levels of accuracy and thus corresponding vibration patterns were obtained.

Źródło:

Journal of KONES; 2018, 25, 4; 337-345
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 56.

Tytuł:

Efficiency as an assessment measure of warehouse facilities location in logistics network

Autorzy:

Jacyna-Gołda, I.
Żak, J.
Wasiak, M.

Powiązania:

https://bibliotekanauki.pl/articles/247767.pdf

Data publikacji:

2015

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

efficiency
logistics network
location

Opis:

The paper presents an approach to the assessment of the location of facilities in the warehouse logistics network with the efficiency of its operations. Determination of efficiency of complex systems of this type should take into account wide range of issues. The system efficiency results on the one hand from the efficiency of its action and on the other hand from the ability to use available system elements to achieve the objectives. Efficiency is a main criterion to the evaluation of the activity both at the level of the whole system, as well as in its subsystems or components. Most often, it refers to the principle of rational management formulated in two variants: performance (maximization effect) and economical (minimizing effort). The article poses the thesis that based on studies of speed and reliability of execution of tasks it is possible to assess the potential locations of warehouse facilities in the studied logistics network. Were also presented factors affecting the efficiency of the functioning of individual cells of the logistics network. Was pointed to the technical, economic, organizational and reliability aspects affecting the efficiency and reliability of the logistics network in terms of both supply and distribution. It was also presented a modular block diagram of an assessment method for localizing logistics facilities in the logistics network.

Źródło:

Journal of KONES; 2015, 22, 3; 59-66
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 57.

Tytuł:

READING EFFICIENCY IN BLENDED LEARNING CONTEXT

Autorzy:

Szymańska, Aleksandra
Kaczmarek, Alicja Wujec

Powiązania:

https://bibliotekanauki.pl/articles/955911.pdf

Data publikacji:

2011

Wydawca:

Uniwersytet Marii Curie-Skłodowskiej w Lublinie. IATEFL Poland Computer Special Interest Group

Tematy:

blended learning
reading efficiency

Opis:

This article describes the experiment investigating the issue of reading efficiency in blended learning context. The study aimed to find out whether reading efficiency is higher when reading from a printed material or from a computer screen and if the effectiveness of reading depends on the attitude towards a text presentation format. The research aimed to inform the teachers that the blended component introduced into the learning English not only does not impede the learning process but improves it by influencing the attitude. The effectiveness of reading was measured in the terms of recall and comprehension of the texts presented in two different modes. The findings show that there is no significant difference as far as recall results are concerned when two delivery modes are applied though the experiment participants obtain higher comprehension results while they deal with electronic texts. The attitude study showed that the participants seemingly born as digital natives prefer reading from a printed material to reading from a computer screen.

Źródło:

Teaching English with Technology; 2011, 11, 2; 29-42
1642-1027

Pojawia się w:

Teaching English with Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 58.

Tytuł:

CFD methods as a modern tool in optimisation of hydrodynamic conditions in magma crystallizers

Autorzy:

Synowiec, P.
Wójcik, J.
Bigda, J.

Powiązania:

https://bibliotekanauki.pl/articles/1955724.pdf

Data publikacji:

2003

Wydawca:

Politechnika Gdańska

Tematy:

CFD
crystallization
hydraulic efficiency

Opis:

Selected parameters concerning the optimisation of hydrodynamics in magma crystallizers are discussed. At this stage, results of CFD (Computational Fluid Dynamics) simulations are shown, focused on the effect of the geometrical configuration of a crystallizer on energy dissipation rate, axial velocity field and general hydraulic efficiency. The influence of the shape of the apparatus' bottom, diameter of the stirrer, its location and presence of the draft tube on, respectively: (i) unit power input distribution, (ii) the average mixing power, and (iii) pumping capacity have been takeninto consideration. The results obtained from simulations have been compared with experiments and literature data.

Źródło:

TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2003, 7, 3; 459-466
1428-6394

Pojawia się w:

TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 59.

Tytuł:

Edukacja jako efektywny sposób poprawy energetyki komunalnej
Education as an effective way to improve municipal energy

Autorzy:

Kozioł, Joachim
Kozioł, Michał
Ziembicki, Piotr

Powiązania:

https://bibliotekanauki.pl/articles/1841045.pdf

Data publikacji:

2020

Wydawca:

STE GROUP

Tematy:

edukacja
efektywność
education
efficiency

Opis:

W pracy przedstawiono sylwetkę nowoczesnego specjalisty z zakresu energetyki komunalnej. Omówiono jego obowiązki i zadania w organizacjach gminnych poszczególnego szczebla. Szczególną uwagę zwrócono na sposoby jego edukacji na studiach akademickich pierwszego stopnia (inżynierskich) i/lub na studiach podyplomowych oraz konferencjach i seminariach. Wskazano na możliwości wykorzystania dobrze wykształconych fachowców z zakresu energetyki komunalnej w procesie zarządzania energetyką energetyczną w gminach, opracowywania audytów obiektów komunalnobytowych, racjonalnego wykorzystania odnawiałnych żródel energii przy zachowaniu zasad gospodarki prosumenckiej oraz do rozpowszeniania technologii Smart Gridu.
The paper presents the silhouette of a modern specialist in the field of municipal energy. His duties and tasks in communal organizations of each level were discussed. Particular attention was paid to his education in first-cycle (engineering) studies and/or post-graduate studies, as well as conferences and seminars. The possibility of using welleducated specialists in the field of municipal energy in the process of energy management in communes was pointed out, audits of municipal and household facilities were developed, rational use of renewable energy sources while maintaining prosumer economy principles and for spreading Smart Grid technology.

Źródło:

Systemy Wspomagania w Inżynierii Produkcji; 2020, 9, 2; 16-23
2391-9361

Pojawia się w:

Systemy Wspomagania w Inżynierii Produkcji

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 60.

Tytuł:

Porównanie wydajności języka skryptowego oraz kompilowanego na podstawie działania algorytmu genetycznego
Comparison of the performance of scripting and compiled languages based on the operation of the genetic algorithm

Autorzy:

Dzikowski, Filip

Powiązania:

https://bibliotekanauki.pl/articles/98430.pdf

Data publikacji:

2019

Wydawca:

Politechnika Lubelska. Instytut Informatyki

Tematy:

Python
C
wydajność
efficiency

Opis:

Celem artykułu jest porównanie wydajności wybranych języków programowania (Python, C) - poprzez pomiar czasu działania oraz wykorzystania zasobów komputera - algorytmu genetycznego dla zadanych parametrów, a następnie ocena czy język skryptowy może być porównywalny pod względem szybkości z językiem kompilowanym. Do tego celu zaimplementowany został algorytm genetyczny w każdym z wymienionych języków, a następnie przeprowadzone zostały testy, których wyniki stanowiły podstawę ostatecznej oceny ich wydajności oraz dowód, że język skryptowy może osiągać czasy działania porównywalne z językiem kompilowanym.
The aim of this work was to compare the performance of selected programming languages (Python, C) by measuring the time of operation and use of computer resources of the genetic algorithm for given parameters, and then assessing whether the scripting language can be comparable in terms of speed with the compiled language. For this purpose, a genetic algorithm has been implemented in each of these languages and test scenarios were developed. The results form the basis for the final evaluation of the performance of the presented languages and proof that the scripting language can achieve operating times comparable to the compiled language.

Źródło:

Journal of Computer Sciences Institute; 2019, 11; 137-144
2544-0764

Pojawia się w:

Journal of Computer Sciences Institute

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 61.

Tytuł:

Evaluation versus The Efficiency of Public Policies

Autorzy:

Przygodzka, Renata

Powiązania:

https://bibliotekanauki.pl/articles/429658.pdf

Data publikacji:

2017

Wydawca:

Uniwersytet w Białymstoku. Wydawnictwo Uniwersytetu w Białymstoku

Tematy:

evaluation
public policies
efficiency

Opis:

The article discusses the importance of evaluation in shaping effective public policies. Its purpose is to answer the question of whether and in what conditions evaluations can be a tool for improving the efficiency of public policies. The article has a theoretical nature and is based on studies of both domestic and foreign literature. The analysis presented in the paper shows that from a theoretical point of view the evaluation (along with its methodology and analytical tools) can be an effective instrument for improving the efficiency of public policies. In practice, however, this efficiency mainly depends on such factors as: the model of governance or the mentality of public administration representatives.

Źródło:

Optimum. Economic Studies; 2017, 5(89)
1506-7637

Pojawia się w:

Optimum. Economic Studies

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 62.

Tytuł:

HYPERBARIC THERAPY INFLUENCE ON PSYCHOMOTOR ABILITIES EFFECTIVENESS DEVELOPMENT – TWO CASES STUDY

Autorzy:

Gotner, Kacper
Gotner, Robert
Pedrycz-Wieczorska, Agnieszka
Wilczyńska, Dominika
Jastrzębowska, Grażyna
Dornowski, Marcin

Powiązania:

https://bibliotekanauki.pl/articles/2137721.pdf

Data publikacji:

2018-07-22

Wydawca:

Fundacja Edukacji Medycznej, Promocji Zdrowia, Sztuki i Kultury Ars Medica

Tematy:

strength training
oxygen
efficiency

Opis:

Background: Hyperbaric therapy is a relatively new non-invasive therapeutic method. It involves inhaling the patient with pure oxygen using a pressure of 2 to 3 absolute atmospheres (ATA). The main purpose of this therapy is to improve the healing mechanisms and repairing processes in the case of various types of wounds and diseases. While in medicine this method is quite popular, in sport it is rarely used today and if so than mainly for the purposes of faster return to full fitness of athletes after injuries or after heavy, intense training conditions. Case study: Two subjects took part in the experiment. Training sessions were performed based on the selected original set of exercises within 29 days. Experiment participant was under conditions of increased pressure (2.5 ATA), during the session he breathed 100% oxygen, provided by the individual respiratory system. The measurement of muscle strength level of selected muscle groups, in selected motor tasks was estimated in (maximum weight – which is the maximum external resistance defeated in one repetition). It was found that there were increases in the level of muscle strength in selected muscles groups in first participant as a result of the applied set of exercises (motor tasks) and the effect of the hyperbaric sessions. Conclusions: The results of the study show that there was a visible/significant influence of the hyperbaric session on increasing the muscle function based on strength training example. This method in combination with adequate strength training sessions could be used in many areas connected with psychomotor development of human abilities.

Źródło:

Acta Neuropsychologica; 2018, 16(2); 213-219
1730-7503
2084-4298

Pojawia się w:

Acta Neuropsychologica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 63.

Tytuł:

The assessment of the effectiveness of means of transport

Autorzy:

Wdzięczny, A.
Woropay, M.

Powiązania:

https://bibliotekanauki.pl/articles/246233.pdf

Data publikacji:

2010

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

transport system
reliability
efficiency

Opis:

As far as the current rules involved in business enterprise operation process are concerned, one of the most significant characteristics is specified by the need of engaging economic criterion in all procedures involved. Thus, it is required to introduce deep and extensive analysis concerning economic aspects ofpassenger transport. First of all, it is essential to specify currently existing demand for passenger transport service and compare it in relation to the supply capabilities offered by a transport enterprise. Business advantages created by the enterprise are also necessary to be considered and analysed. The basis for transport enterprise operation should be provided with order placed by Passenger Transport Executive, subcontracting firm of a chosen line according to valid schedule including both, rush and after-rush hours. In order to avoid any possible difficulties it is very important that the hired company is informed about all factors influencing economic efficiency of the serviced bus line. As a result, subcontractor is enabledto make right decisions and eliminate potential problems. Important processes having a considerable influence on proper functioning and effectiveness of public means of transport are connected with its usage, diagnosing and making it fitness for use. Operation effectiveness aspects that are the most frequently discussed in professional literature is described as relations existing between the profits and the input. It takes form of difference or quotient of the values mentioned above. This paper presents evaluation and analysis method controlling different means of transport operation system effectiveness. Method developed with the aim of analysing and evaluating public means of transport operation effectiveness, provides managerial staff with feedback, which is helpful as far as taking right decisions, is concerned. Making proper choices has a great influence on the process and it bears the responsibility for functioning of the system in terms of reliability and cost efficacy. Certainly, the more professional service is, the more satisfied customers are. Moreover, customer demands are more likely to be met, which means that all involved procedures related with functioning of the system are carried out in the accordance with regulations and reguirements, being currently inforce.

Źródło:

Journal of KONES; 2010, 17, 4; 567-574
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 64.

Tytuł:

Properties of a three disc cycloid gear as a result of bench test

Autorzy:

Pawelski, Z.
Zdziennicki, Z.
Uszpolewicz, G.

Powiązania:

https://bibliotekanauki.pl/articles/243259.pdf

Data publikacji:

2018

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

cycloidal gear
efficiency
vibrations

Opis:

The most common design solution are cycloidal gearboxes with two discs, in which the reaction forces of bearings from the working discs create a bending moment on the high-speed input shaft, additionally affecting bearings. In the article are presented the results of tests of the cycloid gear prototype with three discs. Instead of the second disc, the introduction of two side discs, 1800 from the centre disc, allows you to reduce this moment to zero. To compensate for the unbalance of the shaft, the side discs have half the width of the centre disc. Each disc works with its own, separate set of bronze rollers, separated by Teflon washers, which should reduce the friction forces. In the article are presented the results of the tests of the cycloid gear prototype determining basic parameters such as efficiency, torque fluctuations on the input and output shaft, housing vibrations in three directions. FFT analysis of registered parameters showed high compliance of the designated frequencies for different measured signals. The assumed advantages, i.e. high efficiency and low vibration level in the tested range, were confirmed. The results are presented in the form of three-dimensional graphs as functions of speed and torque. High efficiency (80-90) % was obtained for load moments above 150 Nm, which is practically independent of the rotational speed with which the cycloid gearing works. The oil temperature during the tests was maintained in the range of 36oC ± 2oC. The maximal torque of the cycloidal gear was 500 Nm.

Źródło:

Journal of KONES; 2018, 25, 2; 269-280
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 65.

Tytuł:

Changes as a necessary condition for the development of the Polish Police

Autorzy:

LETKIEWICZ, ARKADIUSZ

Powiązania:

https://bibliotekanauki.pl/articles/1798753.pdf

Data publikacji:

2021-03-17

Wydawca:

Wyższa Szkoła Policji w Szczytnie

Tematy:

police
changes
organisation
efficiency

Opis:

In the article, the author discusses the necessity to constantly introduce organisational changes. In addition, the principles of effective implementation of changes in the Polish Police have been discussed, based on the model developed on the basis of research conducted in 2000, 2004 and 2016.

Źródło:

Przegląd Policyjny; 2021, 1(SPECJALNY); 58-70
0867-5708

Pojawia się w:

Przegląd Policyjny

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 66.

Tytuł:

Transport processes of the small manufacturing enterprises (SME) in the context of logistically efficient product

Autorzy:

Bielecki, M.

Powiązania:

https://bibliotekanauki.pl/articles/409508.pdf

Data publikacji:

2013

Wydawca:

Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej

Tematy:

logistic
management
efficiency
product

Opis:

The article presents the concept of logistically efficient product in the logistic management and results of research conducted on a group of small manufacturing companies in the textile industry from the Lodz region. The research was conducted to determine conditions of logistic management in small manufacturing enterprises and the article shall address the concept of a logistically efficient product in terms of transport organisation and results of research which relate to this issue.

Źródło:

Research in Logistics & Production; 2013, 3, 3; 155-165
2083-4942
2083-4950

Pojawia się w:

Research in Logistics & Production

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 67.

Tytuł:

Some Remarks on the Measure of Effectiveness of Freight Transport

Autorzy:

Dorosiewicz, Sławomir

Powiązania:

https://bibliotekanauki.pl/articles/504112.pdf

Data publikacji:

2017

Wydawca:

Międzynarodowa Wyższa Szkoła Logistyki i Transportu

Tematy:

freight transport
effectiveness / efficiency

Opis:

This paper includes a definition of the indicator of the effectiveness of spatial trade on the macro scale. The degree of efficiency of a given sector, for example transportation, is determined by the relation of production and its cost. This relationship can be evaluated by various models of spatial economies. One of the possible way is considered in this study.

Źródło:

Logistics and Transport; 2017, 34, 2; 57-62
1734-2015

Pojawia się w:

Logistics and Transport

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 68.

Tytuł:

A definition of the concept of economic effectiveness

Autorzy:

Poskart, Robert

Powiązania:

https://bibliotekanauki.pl/articles/529784.pdf

Data publikacji:

2014

Wydawca:

Wyższa Szkoła Bankowa we Wrocławiu

Tematy:

Effectiveness
rationality
efficiency
productivity

Opis:

The concept of economic effectiveness has often been interpreted in an ambiguous manner. There is no clear definition of it in the literature. Individual authors place stress on different elements of this concept. There are also different measures of effectiveness. This article aims to make the concept of economic effectiveness more precise

Źródło:

Central and Eastern European Journal of Management and Economics (CEEJME); 2014, 2, 3; 179-187
2353-9119

Pojawia się w:

Central and Eastern European Journal of Management and Economics (CEEJME)

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 69.

Tytuł:

Design Vulnerability as the Key Element of the Logistics Efficiency of a Product

Autorzy:

Bielecki, Maciej Mieczysław
Madej, Mateusz
Skoczylas, Aleksandra

Powiązania:

https://bibliotekanauki.pl/articles/504309.pdf

Data publikacji:

2014

Wydawca:

Międzynarodowa Wyższa Szkoła Logistyki i Transportu

Tematy:

design
vulnerability
efficiency
product

Opis:

The article highlights the importance of the influence a product itself has on the broadly understood logistics-related issues, referred to as the logistical efficiency of a product. It constitutes the foundation for the concept of design vulnerability of a product, along with its determinants. The paper shows the impact these determinants have on logistics processes on selected examples from the market. The authors of the article also suggest what actions might be undertaken in the strategic and operational sphere of the company logistics, depending on the design vulnerability of a product.

Źródło:

Logistics and Transport; 2014, 21, 1; 5-12
1734-2015

Pojawia się w:

Logistics and Transport

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 70.

Tytuł:

Decision-making model for supporting supply chain efficiency evaluation

Autorzy:

Jacyna-Gołda, I.

Powiązania:

https://bibliotekanauki.pl/articles/224288.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

decision-making model
assessing the efficiency
supply chain efficiency
efficiency
model decyzyjny
ocena efektywności
łańcuch dostaw
efektywność
wskaźniki oceny

Opis:

This paper presents some approach for the formulation of the decision-making model in supporting the assessment of supply chain efficiency. Were presented factors affecting the efficiency of the functioning of individual links of supply chain. Was pointed out the technical, economic, organizational and reliability aspects affecting the efficiency and reliability of functioning of the supply chain both in terms of supply and distribution. Having regard to a comprehensive approach to assessing efficiency of the functioning of supply chains were proposed indicators for assessing the quality of functioning. Were distinguished technical, economic and quality indicators for which also were presented a formal record.

Źródło:

Archives of Transport; 2015, 33, 1; 17-31
0866-9546
2300-8830

Pojawia się w:

Archives of Transport

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 71.

Tytuł:

Energy efficiency improvement in SMEs – analysis of a pilot programme of energy efficiency management in Poland

Autorzy:

Korczak, K.

Powiązania:

https://bibliotekanauki.pl/articles/106047.pdf

Data publikacji:

2016

Wydawca:

Centrum Badań i Innowacji Pro-Akademia

Tematy:

energy efficiency
energy efficiency measures
energy efficiency programme for SMEs
energooszczędność
miary efektywności energetycznej
program efektywności energetycznej dla MŚP

Opis:

This article includes an overview of methods of energy efficiency improvement in small and medium-sized enterprises (SMEs) applied in Poland. It describes the experience of the implementation of energy efficiency programme in Poland, introduced in 2013 by Polish Agency for Enterprise Development’s. Evaluation of the programme shows that energy savings were over 6-times higher than expected by the programme’s author before its implementation and amounted to 53 TJ. Financial savings were almost 5-times higher than expected and amounted to PLN 7.3m. Guidelines for decision makers which would be responsible for the development of similar programmes in the future are presented.

Źródło:

Acta Innovations; 2016, 21; 60-70
2300-5599

Pojawia się w:

Acta Innovations

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 72.

Tytuł:

Analiza techniczno-ekonomiczna instalacji fotowoltaicznej
Techno-economic analysis of a photovoltaic installation

Autorzy:

Ceran, B.
Szczerbowski, R.

Powiązania:

https://bibliotekanauki.pl/articles/394235.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN

Tematy:

moduły fotowoltaiczne
efektywność energetyczna
efektywność ekonomiczna
photovoltaic modules
energy efficiency
economic efficiency

Opis:

W referacie przedstawiono wyniki analizy efektywności przetwarzania energii promieniowania słonecznego na energię elektryczną w warunkach polskich. Pokazano wpływ nasłonecznienia i temperatury pracy modułu fotowoltaicznego na jego krzywą mocy P = f(U). Opisano warunki dla których producenci podają parametry modułów fotowoltaicznych i skonfrontowano je z warunkami rzeczywistymi panującymi w Polsce. Zwrócono uwagę na konieczność podawania przez producentów paneli fotowoltaicznych charakterystyk PPV = f(E) dla różnych wartości temperatury pracy modułów. Przeprowadzono analizę ekonomicznej efektywności inwestycji farmy fotowoltaicznej o mocy 1 MWp z uwzględnieniem aktualnych przepisów prawa dla trzech wariantów. Wariant I – inwestor korzysta ze środków wsparcia pomocy publicznej tylko o charakterze operacyjnym, wariant II – inwestor korzysta ze środków wsparcia pomocy publicznej o charakterze inwestycyjnym w wysokości 1 mln PLN, wariant III – inwestor korzysta ze środków wsparcia pomocy publicznej o charakterze inwestycyjnym w wysokości 2 mln PLN. Dla wszystkich wariantów wyznaczono wskaźniki oceny ekonomicznej efektywności inwestycji oraz wartości cen aukcyjnych od ceny maksymalnej do ceny przy której projekt traci rentowność.
The paper presents the results of the energy analysis of the conversion of solar radiation energy into electrical energy in Polish weather conditions. The effect of sunlight and working temperature on the photovoltaic module on its power curve P = f(U) is shown. STC and NOCT conditions are described for which the manufacturers specify the parameters of the photovoltaic modules. The manufacturers of photovoltaic panels should give the PPV = f(E) characteristic for the different values of the operating temperature of the modules. An analysis of the economic efficiency of a photovoltaic power plant investment of 1 MWp taking the current legal regulations for the three variants into account was presented. Variant I – the investor benefits from the support of public aid of operational only, Variant II – the investor benefits from the support of public aid for investment in the amount of PLN 1 million, Variant III – the investor benefits from the support of public aid for investment in the amount of PLN 2 million. For all variants, indicators for assessing the economic effectiveness of the investment and the value of the auction price from the maximum price to the price at which the project loses its profitability are determined.

Źródło:

Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi i Energią PAN; 2017, 98; 15-26
2080-0819

Pojawia się w:

Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi i Energią PAN

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 73.

Tytuł:

Diagnoza efektywności przedsiębiorstw sektora żywnościowego w Polsce w latach 2014-2016 z wykorzystaniem metody DEA
Diagnosing of the efficiency of food industry in Poland in years 2014-2016 with the use of the DEA method

Autorzy:

Nowak, Marcin
Brzóska, Michał
Tomaszewski, Piotr
Karpiński, Aleksander
Rozwora, Bartosz

Powiązania:

https://bibliotekanauki.pl/articles/202948.pdf

Data publikacji:

2019

Wydawca:

Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej

Tematy:

efektywność
metoda DEA
model nadefektywności
efficiency
DEA method
super efficiency DEA model

Opis:

Celem artykułu jest dokonanie diagnozy efektywności przedsiębiorstw należących do polskiego sektora żywnościowego i notowanych na Giełdzie Papierów Wartościowych w Warszawie. Osiągnięcie wskazanego celu warunkowane jest zastosowaniem metody systematycznej analizy piśmiennictwa oraz metody data envelopment analysis – jednej z metod matematycznego programowania liniowego opartej na koncepcji krzywej możliwości produkcyjnych. W pierwszym rozdziale przedstawiono teoretyczne podstawy metody DEA. W kolejnym rozdziale opisano metodykę badań empirycznych. W rozdziale trzecim przedstawiono najważniejsze wyniki badań oraz omówiono wyniki.
The aim of the article is to make a diagnosis of the efficiency of enterprises belonging to the Polish food sector and listed on the Stock Exchange in Warsaw. Achievement of the indicated objective is conditioned by the use of the method of systematic literature analysis and the Data Envelopment Analysis method – one of the methods of mathematical linear programming based on the concept of a production capacity curve. The first chapter presents the theoretical foundations of the DEA method. The next chapter describes the methodology of empirical research. In the third chapter, the most important research results are presented and a discussion of results was conducted.

Źródło:

Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie; 2019, 79; 149-161
0239-9415

Pojawia się w:

Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 74.

Tytuł:

Cooling water flow influence on power plant unit performance for various condenser configurations setup

Autorzy:

Dobkiewicz-Wieczorek, Ewa

Powiązania:

https://bibliotekanauki.pl/articles/2091367.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

cooling water
power plant efficiency
cooling water flow control
CHP plant
efficiency

Opis:

This paper presents the influence of cooling water regulation on power plant net efficiency. It was examined whether, for the non-nominal low-pressure turbine load, it is justified to reduce the cooling water pump load, and how it would affect the unit net efficiency. Calculations for two types of power units were carried out: with condensing and extraction-condensing turbine. The tested condensing power plant consists of three surface condensers. The calculation included four condensers’ connections set up on the cooling water side to check how the cooling water system pressure drop affects the net unit performance. The result has confirmed that implementing serial connection decreases net efficiency when cooling water flow regulation is used, but the mixed connection should be applied when pump load is not controlled. It was proved that the cooling water flow control gives a profit for both units. Net efficiency for combined heat and power plant can be improved by 0.1–0.5 pp, the gain is remarkable below 60% of the low-pressure turbine part load. Flow control implementation in the unit with condensing turbine water control gives a similar profit just below 80% of the turbine load. Next, an influence of the additional limitations of a cooling water system (minimal total pump head, cooling tower) affecting the feasibility of implementing the water control has been considered. Applying a multi-cell forced draft cooling tower does not have a significant impact on results, but when a natural draft cooling tower is used, the flow control range is strongly reduced.

Źródło:

Archives of Thermodynamics; 2022, 43, 1; 141--167
1231-0956
2083-6023

Pojawia się w:

Archives of Thermodynamics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 75.

Tytuł:

Porównanie finansowo - środowiskowe farmy wiatrowej i fotowoltaicznej dedykowanych dla zasilania strefy przemysłowej

Autorzy:

Jastrzębski, Paweł
Grabiński, Tadeusz
Luty, Zbigniew
Prawelska-Skrzypek, Grażyna

Powiązania:

https://bibliotekanauki.pl/articles/2147417.pdf

Data publikacji:

2021

Wydawca:

Wyższa Szkoła Ekonomii i Informatyki w Krakowie

Tematy:

energetyka odnawialna
efektywność ekonomiczna
efektywność finansowa
renewable energy
financial efficiency
economic
efficiency

Opis:

Celem artykułu jest porównanie efektywności finansowej i ekonomicznej farmy wiatrowej i farmy fotowoltaicznej w celu wsparcia decyzji o najbardziej efektywnej inwestycji w odnawialne źródła energii, mającej na celu dostarczenie energii do strefy ekonomicznej na południu Polski. W artykule przedstawiono zastosowanie analiz finansowo-ekonomicznych wybranych odnawialnych źródeł energii (OZE). Analizę ax-ante OZE przeprowadzono w oparciu o prognozowane dane z terenów, takie jak określenie potencjału energetycznego wiatrów (prędkość, chropowatość terenu) i nasłonecznienie. Na podstawie przyjętych założeń dotyczących cen energii, nakładów inwestycyjnych oraz kosztów operacyjnych, jak i efektów środowiskowych w postaci unikniętych emisji substancji szkodliwych obliczono zaktualizowaną wartość netto oraz wewnętrzną stopę zwrotu. Wyniki pokazują, że opłacalność inwestycji w OZE zależy od kilku czynników, które są analizowane w pracy w odniesieniu do danego studium przypadku. Dlatego przedstawione wyniki powinny w szczególności informować decydenta o kosztach i korzyściach zarówno finansowych jak i ekonomicznych instalacji OZE
The purpose of this paper is to compare the financial and economic efficiency of a wind farm and a photovoltaic farm in order to support the decision on the most effective investment in renewable energy sources aimed at providing energy to the economic zone in southern Poland. The paper presents the application of financial-economic analyses of selected renewable energy sources (RES). The ax-ante analysis of RES was carried out based on the projected data from the sites, such as determination of wind energy potential (speed, terrain roughness) and insolation. Net present value and internal rate of return were calculated based on assumptions made about energy prices, capital expenditures and operating costs, and environmental effects in the form of avoided emissions. The results show that the profitability of RES investments depends on several factors, which are analysed in the paper in relation to the case study. Therefore, the results presented should especially inform the decision maker about the costs and benefits of both financial and economic RES installations.

Źródło:

Zeszyty Naukowe Wyższej Szkoły Ekonomii i Informatyki w Krakowie; 2021, 17; 93-104
1734-5391

Pojawia się w:

Zeszyty Naukowe Wyższej Szkoły Ekonomii i Informatyki w Krakowie

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 76.

Tytuł:

Pollination, fertilization and fruit formation in eggplant [Solanum melongena L.]
Zapylenie, zaplodnienie i wiazanie owocow u oberzyny [Solanum melongena L.]

Autorzy:

Sekara, A
Bieniasz, M

Powiązania:

https://bibliotekanauki.pl/articles/26662.pdf

Data publikacji:

2008

Wydawca:

Polskie Towarzystwo Botaniczne

Tematy:

Solanum melongena
pollination efficiency
plant
fertilization
pollination
fertilization efficiency
fruit formation
eggplant

Opis:

The aim of the investigations was to determine the regularity of pollination and fertilization as dependent on the phenotype of fl ower in eggplant. The experiment was conducted in 2005 and 2006 at the Agricultural University in Kraków, Poland. The object of the investigations was eggplant (Solanum melongena L.) ‘Epic F1’, grown in the open field. Flower phenotype (long-, medium- or short-styled), fruit setting and the number of seeds per fruit were recorded on experimental plants during the flowering period. The number of pollen tubes in the middle of the style and the number on fertilized ovules in ovaries were evaluated for all types of flowers. The course of pollination was different in particular types of eggplant flowers. Differences concerned only the number of pollen tubes and fertilized ovules of short, medium- and long-styled flowers and the number of seeds in the fruit. There was not observed any incompatibility in the growth on pollen tubes in the styles of all types of eggplant flowers. Stereomicroscopy observations of cross sections of the ovaries do not show differences in the formation and position of the ovules on the placenta. Short-styled flowers were characterized by signifi cantly lower pollination and fruit set effi ciency and they produced fruits with a signifi cantly lower number of seeds. The low number of pollen tubes, fertilized ovules and seeds can be a straight consequence of the morphology of short-styled fl owers: small-sized stigmas and spatial separation of anther pores and stigmas, which makes pollination diffi cult.
Celem badań było określenie prawidłowości zapylenia i zapłodnienia u oberżyny w zależności od budowy morfologicznej kwiatu. Badania prowadzono w latach 2005 i 2006 w Akademii Rolniczej w Krakowie. Obiektem badań była odmiana Epic F1, uprawiana w polu. W okresie kwitnienia analizowano występowanie poszczególnych typów słupków (długo-, średnio- i krótko-szyjkowych). Określono liczbę łagiewek pyłkowych w przerastających szyjkę analizowanych typach słupków i liczbę zapłodnionych zalążków. Stwierdzono różnice w przebiegu zapylenia i zapłodnienia pomiędzy poszczególnymi typami słupków, dotyczące liczby łagiewek pyłkowych i zapłodnionych zalążków oraz liczby nasion w owocach. Nie stwierdzono niezgodności w przeroście łagiewek pyłkowych w szyjce słupka. Obserwacje stereomikroskopowe nie wykazały różnic w uformowaniu i ułożeniu zalążków na łożyskach poszczególnych typów słupków. Słupki krótko- szyjkowe charakteryzowała istotnie mniejsza efektywność zapylenia i zapłodnienia, a zawiązane z nich owoce zawierały najmniej nasion. Mała liczba łagiewek pyłkowych i zapłodnionych zalążków w kwiatach krótko- szyjkowych może być wynikiem małych rozmiarów znamienia i jego oddalenia od pylników, utrudniającego zapylenie.

Źródło:

Acta Agrobotanica; 2008, 61, 1
0065-0951
2300-357X

Pojawia się w:

Acta Agrobotanica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 77.

Tytuł:

Energetic and economic efficiency of agricultural biogas plant working with different substrates
Efektywność energetyczna i ekonomiczna biogazowni rolniczej zasilanej różnymi wariantami substratów

Autorzy:

Dach, J.

Powiązania:

https://bibliotekanauki.pl/articles/336924.pdf

Data publikacji:

2016

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych

Tematy:

biogas
substrates
energetic efficiency
economic efficiency
biogaz
substrat
efektywność energetyczna
efektywność ekonomiczna

Opis:

Ensuring the profitability of working biogas plants is a key factor for the development of biogas market. Apart from the price obtained for sold electricity, the substrates are the most important factor, particularly the ratio of their acquisition cost to methane efficiency. Thus, the objective of this paper was energy and economic analysis of the typical biogas plant with a capacity of 1 MWe working in new, favorable market situation (higher prices for blue certificates and in auction system) and using different biomass and waste substrates. After biogas efficiency tests and economic calculations of 4 different agricultural and waste substrates (maize silage, beet pulp, refood and chicken manure) it has been stated that the chicken manure was the most energy effective, just after maize silage. However chicken manure is 5 times cheaper. However, refood is the most profitable substrate for biogas plant working in both variants (certificates and auctions), and slightly less favorable - chicken manure. It is related to the best price - methane efficiency ratio, since the adoption of refood for biogas plants receives payment in the amount of 20 PLN per ton. In vast majority of analyzed substrates, investment in agricultural biogas plant is now becoming a very profitable venture, because annual profit before tax fluctuated in the range of 1-4 million PLN.
Najważniejszym czynnikiem dla rozwoju rynku biogazowego jest zapewnienie opłacalności pracy biogazowni. Poza ceną uzyskaną za sprzedawaną energię elektryczną, najważniejszym czynnikiem są substraty, a zwłaszcza stosunek ich kosztu pozyskania do wydajności metanowej. Stąd celem niniejszej pracy była analiza energetyczna i ekonomiczna typowej biogazowni o mocy 1 MWe pracującej w nowej, korzystnej sytuacji rynkowej (wyższe ceny za błękitne certyfikaty oraz w systemie aukcyjnym) i wykorzystujące różne substraty biomasowe i odpadowe. Po przeprowadzeniu badań i obliczeń dla 4 różnych substratów rolniczych i odpadowych (kiszonka z kukurydzy, wysłodki buraczane, refood i obornik kurzy) stwierdzono, że najbardziej efektywny energetycznie był obornik kurzy obok kiszonki z kukurydzy. Obornik kurzy jest jednak 5 razy tańszy w pozyskaniu. Z kolei najbardziej opłacalnym substratem dla biogazowni rolniczej pracującej w obu wariantach (certyfikatów jak i aukcji) jest refood, nieco mniej korzystnym obornik kurzy. Wynika to z najkorzystniejszego stosunku ceny do wydajności metanowej bowiem za przyjęcie refood do biogazowni otrzymuje się dopłatę w wysokości 20 zł za tonę. W zdecydowanej większości analizowanych substratów inwestycja w biogazownię rolniczą staje się obecnie bardzo opłacalnym przedsięwzięciem, bowiem roczny zysk przed opodatkowaniem wahał się w zakresie 1-4 mln zł.

Źródło:

Journal of Research and Applications in Agricultural Engineering; 2016, 61, 3; 72-76
1642-686X
2719-423X

Pojawia się w:

Journal of Research and Applications in Agricultural Engineering

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 78.

Tytuł:

The impact of economic size of farms on their material and energy expenditure
Wpływ wielkości ekonomicznej na nakłady materiałowe i energetyczne w gospodarstwach rolnych

Autorzy:

Depo, Kamil
Rabier, Fabienne
Huyghebaert, Bruno
Szparaga, Agnieszka
Kocira, Sławomir

Powiązania:

https://bibliotekanauki.pl/articles/93443.pdf

Data publikacji:

2020

Wydawca:

Polskie Towarzystwo Inżynierii Rolniczej

Tematy:

family farm
farming efficiency
expenditure efficiency
gospodarstwo rodzinne
efektywność gospodarowania
efektywność nakładów

Opis:

The study assesses the impact of the economic size of farms on the efficiency of their material and energy expenditure, based on 679 farms from the Lubelskie Voivodeship. The analysis was made for the years 2013-2015 and the farms were divided into six economic size classes. 5 indexes for the efficiency of material, energy and material-energy expenditures were calculated for all farms. The aim of the work was to select a group of farms with the highest efficiency of energy and material expenditure. It was found that economically small farms managed this expenditure most effectively, as evidenced by the highest values of 4 out of 5 analyzed indexes. Very small and medium-small farms demonstrated the highest efficiency of material expenditure. In contrast, energy expenditure was most efficiently used by medium-small farms. The farms that were the largest economically were characterized by the highest efficiency index of material and energy expenditure, calculated as the ratio of total production to the expenditure.
W pracy dokonywano oceny wpływu wielkości ekonomicznej na efektywności nakładów materiałowo-energetycznych w 679 gospodarstw rolnych z województwa lubelskiego. Analizy dokonano dla lat 2013-2015 dzieląc gospodarstwa na 6 klas wielkości ekonomicznej. Dla wszystkich gospodarstw obliczono 5 wskaźników efektywności nakładów materiałowych, energetycznych i materiałowo-energetycznych. Za cel pracy przyjęto wytypowanie spośród gospodarstw grupy gospodarstw rolnych o największej efektywności nakładów materiałowo energetycznych. Stwierdzono, że gospodarstwa małe ekonomicznie najlepiej gospodarują tymi nakładami. Świadczą o tym najwyższe spośród badanych grup wartości 4 z 5 analizowanych wskaźników. Gospodarstwa bardzo małe i średnio małe wykazały się największą efektywnością nakładów materiałowych. Natomiast najefektywniej nakłady energetyczne wykorzystywano w gospodarstwach średnio małych. Gospodarstwa największe ekonomicznie charakteryzują się najwyższym wskaźnikiem efektywności nakładów materiałowo-energetycznych obliczanych jako stosunek produkcji ogółem do tych nakładów.

Źródło:

Agricultural Engineering; 2020, 24, 2; 29-38
2083-1587

Pojawia się w:

Agricultural Engineering

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 79.

Tytuł:

Economic and financial efficiency as a development challenge for cooperative banks in Poland
Efektywność ekonomiczno-finansowa jako wyzwanie rozwojowe dla banków spółdzielczych w Polsce

Autorzy:

Kata, R.

Powiązania:

https://bibliotekanauki.pl/articles/1790569.pdf

Data publikacji:

2019

Wydawca:

The Polish Association of Agricultural and Agribusiness Economists

Tematy:

cooperative banks
financial efficiency
economic efficiency
banki spółdzielcze
efektywność finansowa
efektywność ekonomiczna

Opis:

In paper the economic and financial efficiency of cooperative banks in Poland in 2004-2018 was assessed. It was developed and the efficiency gap ratio, which determines the efficiency gap of cooperative banks towards commercial banks in particular areas of banking activity, was applied. It was shown that the effectiveness of cooperative banks compared to commercial banks is gradually deteriorating, which was already visible from 2013. Negative trends mainly concern the return on assets and the return on equity, the ability to transform deposits into loans to customers and the quality of the loan portfolio. It was found that the deterioration of economic and financial efficiency of cooperative banks occurred primarily in 2015-2018, in conditions of a good macroeconomic situation in Poland. This means that the reasons for the weakening of cooperative bank efficiency are internal sources, i.e. the model of a bank’s operation and the organization and rules of functioning of cooperative bank associations. The reversal of these negative trends is a prerequisite for the sustainable development of cooperative banks and requires changes in their business model and strengthening intra-group integration. This will reduce the operating costs of banks and achieve economies of scale.
W artykule dokonano oceny efektywności ekonomiczno-finansowej banków spółdzielczych w Polsce w latach 2004-2018. Opracowano i zastosowano współczynnik luki efektywności, który określa dystans efektywnościowy banków spółdzielczych względem banków komercyjnych, w poszczególnych obszarach działalności bankowej. Wykazano, że efektywność banków spółdzielczych w porównaniu do banków komercyjnych sukcesywnie pogarsza się, co było już widoczne od 2013 roku. Negatywne tendencje dotyczą głównie rentowności aktywów i rentowności kapitału własnego banków, zdolności do transformacji depozytów w kredyty dla klientów oraz jakości portfela kredytowego. Ustalono, że pogorszenie efektywności ekonomiczno-finansowej banków spółdzielczych nastąpiło przede wszystkim w latach 2015-2018, a zatem warunkach dobrej koniunktury gospodarczej w Polsce. Oznacza to, że przyczyny osłabienia efektywności banków spółdzielczych mają źródła wewnętrzne, tj. model działania banków oraz organizacja i zasady funkcjonowania zrzeszeń banków spółdzielczych. Odwrócenie tych negatywnych trendów jest warunkiem zrównoważonego rozwoju banków spółdzielczych i wymaga zmian w ich modelu biznesowym oraz wzmocnienia integracji wewnątrz zrzeszeń. Pozwoli to na redukcję kosztów działania banków i uzyskanie efektów skali.

Źródło:

Annals of The Polish Association of Agricultural and Agribusiness Economists; 2019, 21, 3; 173-182
2657-781X
2657-7828

Pojawia się w:

Annals of The Polish Association of Agricultural and Agribusiness Economists

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 80.

Tytuł:

The methodology of the gas turbine efficiency calculation

Autorzy:

Kotowicz, J.
Job, M.
Brzęczek, M.
Nawrat, K.
Mędrych, J.

Powiązania:

https://bibliotekanauki.pl/articles/240275.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

gas turbine
polytropic efficiency
isentropic efficiency
turbina gazowa
efektywność politropowa
obiekt chłodniczy

Opis:

In the paper a calculation methodology of isentropic efficiency of a compressor and turbine in a gas turbine installation on the basis of polytropic efficiency characteristics is presented. A gas turbine model is developed into software for power plant simulation. There are shown the calculation algorithms based on iterative model for isentropic efficiency of the compressor and for isentropic efficiency of the turbine based on the turbine inlet temperature. The isentropic efficiency characteristics of the compressor and the turbine are developed by means of the above mentioned algorithms. The gas turbine development for the high compressor ratios was the main driving force for this analysis. The obtained gas turbine electric efficiency characteristics show that an increase of pressure ratio above 50 is not justified due to the slight increase in the efficiency with a significant increase of turbine inlet combustor outlet and temperature.

Źródło:

Archives of Thermodynamics; 2016, 37, 4; 19-35
1231-0956
2083-6023

Pojawia się w:

Archives of Thermodynamics

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 81.

Tytuł:

Thermodynamic analysis of a combined cycle power plant located in Jordan: A case study

Autorzy:

Bataineh, Khaled
Khaleel, Bara A.

Powiązania:

https://bibliotekanauki.pl/articles/240565.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

combined cycle power plant
energy efficiency
exergy efficiency
exergy destruction
exergy losses

Opis:

Efficiency and electrical power output of combined cycle power plants vary according to the ambient conditions. The amount of these variations greatly affects electricity production, fuel consumption, and plant incomes. Obviously, many world countries have a wide range of climatic conditions, which impact the performance of power plants. In this paper, a thermodynamic analysis of an operating power plant located in Jordan is performed with actual operating data acquired from the power plant control unit. The analysis is performed by using first and second laws of thermodynamics. Energy and exergy efficiencies of each component of the power plant system are calculated and the effect of ambient temperature on the components performance is studied. The effects of gas turbine pressure ratio, gas turbine inlet temperature, load and ambient conditions on the combined cycle efficiency, power outputs and exergy destruction are investigated. Energy and exergy efficiencies of the combined cycle power plant are found as 45.29%, and 42.73% respectively when the ambient temperature is 34°C. Furthermore, it is found that the combustion chamber has the largest exergy destruction rate among the system components. The results showed that 73% of the total exergy destruction occurs in the combustion chamber when the ambient temperature is 34°C. Moreover, the results show that the second major exergy loss is in HRSC. The results show that the energy and exergy efficiency of the combined cycle power plant decreases as the ambient temperature increases. According to the calculation results, improvement and modification suggestions are presented.

Źródło:

Archives of Thermodynamics; 2020, 41, 1; 95-123
1231-0956
2083-6023

Pojawia się w:

Archives of Thermodynamics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 82.

Tytuł:

Liquidity as a measure of efficiency of fruit and vegetable producer groups and organizations

Autorzy:

Pawlak, J.
Kopinski, L.
Paszko, D.
Banach-Albinska, B.

Powiązania:

https://bibliotekanauki.pl/articles/43116.pdf

Data publikacji:

2018

Wydawca:

Uniwersytet Przyrodniczy w Poznaniu. Wydawnictwo Uczelniane

Tematy:

liquidity
financial liquidity
producer group
group efficiency
producer organization
organization efficiency
efficiency
fruit and vegetable producer group
fruit
vegetable
horticulture

Źródło:

Journal of Agribusiness and Rural Development; 2018, 48, 2
1899-5241

Pojawia się w:

Journal of Agribusiness and Rural Development

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 83.

Tytuł:

Regional eco-efficiency of the agricultural sector in V4 regions, its dynamics in time and decomposition on the technological and pure technical eco-efficiency change

Autorzy:

Richterová, Eva
Richter, Martin
Sojková, Zlata

Powiązania:

https://bibliotekanauki.pl/articles/22444326.pdf

Data publikacji:

2021

Wydawca:

Instytut Badań Gospodarczych

Tematy:

agricultural eco-efficiency
Visegrad regions
Malmquist index
technological change
pure technical eco-efficiency

Opis:

Research background: Agriculture plays a vital role in producing food to ensure food security, but it is one of the biggest contributors to environmental pollution. One of the main goals of the new CAP is to set higher ambitions for environmental actions, which brings into the front the concept of agricultural eco-efficiency. The notion of eco-efficiency includes the economic and also ecological dimensions of sustainable agriculture. Purpose of the article: The main goal of this paper is to evaluate the eco-efficiency of agricultural production and its dynamics during the years 2013, 2015, and 2017 of NUTS 2 regions within the Visegrad 4  (V4), i. e. The Czech Republic, Slovakia, Hungary, and Poland. The part of the main goal is to verify the research hypothesis that all the biggest agriculture producers are eco-efficient. Methods: V4 regional eco-efficiency of the agricultural sector is expressed by the Malmquist productivity index and is estimated using the output-oriented Data envelopment analysis (DEA) model, under the assumption of constant return to scale (CRS). The Malmquist index is decomposed to technical eco-efficiency change (EC) and technological change (TC). Based on the eco-efficiency, technological and pure technical eco-efficiency change, V4 regions are classified into three groups: the most progressive regions, the progressive regions, and the regressive regions. Findings & value added: CZ02: Central Bohemia, CZ04: Northwest, HU33: Dél-Alföld, HU31: Észak-Magyarország, HU32: Észak-Alföld, PL21: Malopolskie, PL41: Wielkopolskie, SK01: Bratislava region, and SK02: Western Slovakia have an eco-effective agricultural sector, the remaining V4 regions have eco-ineffective agricultural sector. The research hypothesis that all the biggest agricultural producers are eco-effective is not confirmed. During the analyzed years, 19 V4 regions improve their agricultural eco-efficiency. The main contributor to eco-efficiency improvement is technological progress, which indicates that producers implement innovations that lead to more eco-efficiency agricultural production.

Źródło:

Equilibrium. Quarterly Journal of Economics and Economic Policy; 2021, 16, 3; 553-576
1689-765X
2353-3293

Pojawia się w:

Equilibrium. Quarterly Journal of Economics and Economic Policy

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 84.

Tytuł:

The evaluation of usefulness of energetic efficiency indexes of drying systems
Ocena przydatności wskaźników oceny efektywności energetycznej systemów suszących

Autorzy:

Walczak, R.

Powiązania:

https://bibliotekanauki.pl/articles/258274.pdf

Data publikacji:

2006

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy

Tematy:

system suszący
efektywność energetyczna
wskaźniki oceny
drying system
energetic efficiency
energy efficiency indexes

Opis:

The possible application of energy efficiency indexes is presented in the paper. Due to various drying conditions and various process variables the indexes' values cannot be quantified in fixed values. The method of defining critical index values is presented. The drying system can be evaluated as useful or useless in the given conditions. The energetic efficiency indexes are used in an expert system in order to evaluate and compare convective tower dryers. Various drier producers present different drying indexes. Due to a large variety of driers' quality coefficients, customers cannot compare different driers. The expert system can calculate the drying indexes based on the available data. The user of the expert system is informed which quality class the drier belongs to. If a few driers are evaluated, the expert system additionally ranges them.
W pracy przedstawiono możliwości zastosowania wskaźników oceny efektywności systemów bioagrosuszących. Wartości wskaźników nie mogą być bezwzględnie skwantyfikowane, ponieważ zależą od warunków prowadzenia procesu suszenia oraz od wartości parametrów termodynamicznych mediów. Zaproponowano sposób określania dopuszczalnych wartości wskaźników, na podstawie których oceniany jest system bioagrosuszący. Wieloaspektowa ocena klasyfikuje system bioagrosuszący jako przydatny lub nieprzydatny użytkowo w danych warunkach eksploatacji. Dodatkowo urządzenia ocenione jako przydatne użytkowo klasyfikowane są do jednej z czterech zdefiniowanych klas przydatności.

Źródło:

Problemy Eksploatacji; 2006, 2; 205-214
1232-9312

Pojawia się w:

Problemy Eksploatacji

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 85.

Tytuł:

Modernization of DVB-S2 Standard Using Signal-Code Constructions Based on Amplitude Modulation of Many Components

Autorzy:

Horbatyi, Ivan
Yashchyshyn, Yevhen

Powiązania:

https://bibliotekanauki.pl/articles/227156.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

DVB-S2 standard
frequency efficiency
energy efficiency
amplitude modulation of many components

Opis:

It is proposed to modernize the DVB-S2 standard by using AMMC (amplitude modulation of many components) signals instead of 8PSK (8-phase shift keying) and APSK (amplitude-phase shift keying) signals, and to modernize the DVB-S2 standard equipment by using the AMMC modulator and AMMC demodulator. Usage of AMMC makes it possible to reduce the symbol error rate in communication channel up to 52 times. The satellite digital video broadcast systems that apply signal-code constructions based on AMMC are characterized by a higher energy efficiency from 1 to 2.6 dB compared with signal-code constructions based on 8PSK and APSK.

Źródło:

International Journal of Electronics and Telecommunications; 2020, 66, 2; 315-320
2300-1933

Pojawia się w:

International Journal of Electronics and Telecommunications

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 86.

Tytuł:

Operation efficiency in the fruit production chain - a study based on real cases
Efektywność operacji w łańcuchu produkcji owoców - badania oparte na rzeczywistych przypadkach

Autorzy:

Felfoldi, J.
Apati, F.

Powiązania:

https://bibliotekanauki.pl/articles/952598.pdf

Data publikacji:

2014

Wydawca:

The Polish Association of Agricultural and Agribusiness Economists

Tematy:

operation efficiency
fruit production
production chain
apple
agricultural cooperative organization
economic efficiency
producer

Opis:

In our study, by simulating the model of an apple producing firm, we investigated how the availability of postharvest establishments influences the economic efficiency of production. The results of our analysis highlighted the fact that by possessing cold storage and introducing an extended selling period, a producing enterprise may make higher profits (NPV) of 40 to 50% during the lifetime of the investment than if without such postharvest mechanisms. In the investigated case, however, because of the huge capital requirement at the beginning, the internal rate of return (IRR) was somewhat unfavourable. However, in the case of own, ready and running postharvest establishments, better investment economic efficiency parameters (from 40 – 120 %) may be reached. Thus the capital need for investment is much lower for the producing enterprise, but the price advantage of the extended selling period remains.
Zbadano, jak dyspozycyjność placówek po zbiorze wpływa na ekonomiczną wydajność produkcji. Do analizy użyto modelu firmy produkującej jabłka. Stwierdzano, że posiadanie chłodni oraz wprowadzenie przedłużonego okresu sprzedaży powoduje, że firma podczas całego okresu trwania inwestycji osiąga większe o 40-50% zyski (NPV) niż firma nieposiadająca tego typu mechanizmów po zbiorze. W badanej firmie jednak z powodu ogromnego zapotrzebowania na kapitał początkowy wewnętrzna stopa zwrotu (IRR) nie była korzystna. Niemniej jednak, w przypadku własnej, wyposażonej i działającej placówki po zbiorze, mogą zostać osiągnięte lepsze parametry ekonomicznej wydajności (od 40 do 120%). Wtedy kapitał potrzebny do inwestycji w firmę produkcyjną jest dużo niższy, a korzyści finansowe płynące z wydłużonego okresu sprzedaży pozostają takie same.

Źródło:

Roczniki Naukowe Stowarzyszenia Ekonomistów Rolnictwa i Agrobiznesu; 2014, 16, 4
1508-3535
2450-7296

Pojawia się w:

Roczniki Naukowe Stowarzyszenia Ekonomistów Rolnictwa i Agrobiznesu

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 87.

Tytuł:

Prospects of table eggs production in Belarus

Autorzy:

Sytchevnik, A.
Golovkov, V.

Powiązania:

https://bibliotekanauki.pl/articles/573919.pdf

Data publikacji:

2010

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

Belorussia
egg production
poultry
farming
production efficiency
efficiency factor
poultry farm
production cost

Opis:

Problems of development of egg production in Belarus are considered. Dynamics of volume of egg production is considered for the period of 1995-2009. Results of production and sale of eggs by integrated (mass production) poultry farms are analyzed by means of a correlation method.

Źródło:

Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie. Problemy Rolnictwa Światowego; 2010, 10(25), 3
2081-6960

Pojawia się w:

Zeszyty Naukowe Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie. Problemy Rolnictwa Światowego

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 88.

Tytuł:

Struktura własnościowa a efektywność technologiczna największych banków w Polsce
The Ownership Structure and Technological Efficiency of Poland’s Largest Banks

Autorzy:

Guzik, Bogusław

Powiązania:

https://bibliotekanauki.pl/articles/575756.pdf

Data publikacji:

2009-02-28

Wydawca:

Szkoła Główna Handlowa w Warszawie. Kolegium Analiz Ekonomicznych

Tematy:

DEA (Data Envelopment Analysis)
SE-CCR
efficiency
banks
ownership structure
econometric efficiency model

Opis:

Using data on Poland’s 50 largest banks-ranked by Bank Miesięcznik Finansowy in June 2007-the author calculated indicators of efficiency for 23 Polish banks. These indicators were calculated for 2006 according to a key Data Envelopment Analysis (DEA) model known as the SE-CCR. On the basis of data on the banks’ shareholding structure by country of origin and type of ownership-as well as data on when the banks were established-the author checked if individual groups of banks differed from one another in the average level of efficiency. Guzik used the Kruskal-Wallis test to this end. He also developed a model to explain the relationship between efficiency in the sense of CCR super-efficiency and the ownership structure of banks and their age. Overall, the paper shows that privately held banks controlled by foreign shareholders and established after 2000 are far more efficient than banks owned by domestic shareholders and established before 2000, especially if they are controlled by the state.

Źródło:

Gospodarka Narodowa. The Polish Journal of Economics; 2009, 229, 1-2; 49-68
2300-5238

Pojawia się w:

Gospodarka Narodowa. The Polish Journal of Economics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 89.

Tytuł:

Effective efficiency in car engine as a function of reduction ratio during energy-aying speed control

Autorzy:

Ubysz, A.

Powiązania:

https://bibliotekanauki.pl/articles/246247.pdf

Data publikacji:

2010

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

power efficiency
driving cycle
effective engine efficiency
B. S. F. C.
load torque

Opis:

The study examines the effect of transformation ratio in power transmission system on engine efficiency as a function of passenger vehicle velocity (m = 1400 kg) with energy-saving vehicle drive. The study also presents working range in driving phases for energy-saving speed control up to 120 km/h for a simplified overall engine performance map for SI engine. Understanding of the presented considerations can be facilitated through relating with advantages of application of non-driving phases in low engine load phases (field 4 in overall engine performance map). Working points of SI engines in engine performance maps were divided in terms of energy-saving vehicle speed control into 4 ranges. Zone l is the most economic whereas zones 3 and 4 are the least energy-saving, which was also discussed by the author in other works. The study presents the location of engine working points in overall engine performance map during energy-saving vehicle speed control within the range of 30-120 km/h using two different 6-gear gearboxes. Working range for CI engine in simplified overall characteristics in truck, the impact of speed control upon fuel consumption in real traffic conditions, sum and difference characteristics of components of drive engine unitary power, area of maximal rise in overall engine efficiency after reduction of rotational speed, simplified SI engine performance maps, covering with economic zone of working point in energy-saving drive of vehicles are presented in the paper.

Źródło:

Journal of KONES; 2010, 17, 4; 547-552
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 90.

Tytuł:

Resource-efficient intelligent transportation systems as a basis for sustainable development. Overview of initiatives and strategies

Autorzy:

Vovk, Y.

Powiązania:

https://bibliotekanauki.pl/articles/2140665.pdf

Data publikacji:

2016

Wydawca:

Fundacja Centrum Badań Socjologicznych

Tematy:

intelligent transportation systems
communications technology
telecommunication standards
safety
resource-efficiency
energy efficiency
vehicles

Opis:

Intelligent transportation systems mostly operate on information exchange principle between vehicles and roadside infrastructure. They are commonly regarded as a base technology for persistent diminution of road accidents and traffic efficiency increase. However, intelligent transportation systems can also be used at all levels of transportation systems as a basis for stable development of cities, enterprises, regions, states, continents. According to the research, the existing intelligent transportation systems not only provide the considerable reduction of greenhouse gases emissions, fuel saving, time of travel cutting, but they don’t marginalize citizens’ mobility as well. Thus, the further development and introduction of modern transportation innovative technologies will allow to guarantee the power- and resources efficiency and, therefore, the sustainable development of the whole society.

Źródło:

Journal of Sustainable Development of Transport and Logistics; 2016, 1, 1; 6-10
2520-2979

Pojawia się w:

Journal of Sustainable Development of Transport and Logistics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 91.

Tytuł:

WPŁYW FEMINIZACJI ZARZĄDÓW BANKÓW SPÓŁDZIELCZYCH NA ICH EFEKTYWNOŚĆ FINANSOWĄ
THE IMPACT OF FEMINIZATION OF THE BOARDS OF THE COOPERATIVE BANKS ON THEIR FINANCIAL EFFICIENCY

Autorzy:

Juszczyk, Sławomir
Idasz-Balina, Marta

Powiązania:

https://bibliotekanauki.pl/articles/508706.pdf

Data publikacji:

2018

Wydawca:

Wyższa Szkoła Bezpieczeństwa Publicznego i Indywidualnego Apeiron w Krakowie

Tematy:

gender
financial efficiency
cooperative bank

Opis:

The purpose of the study was to determine the relationship between the managerial feminization rate and the level of its financial effectiveness. The results showed that on average on the net financial result and ROE the highest level of these performance measures was characterized by a group of cooperative banks, where all the functions of the board were performed by men. However, the highest level of net profit was achieved by the bank where the chair of the board was a woman and the rest of the board were men. In the case of ROA, the highest level was recorded in the group of cooperative banks in which women performed all functions on the board. The studies also showed that the total capital ratio TCR had the highest level in the banks also by 100% of the feminization rate, while the lowest ratio was recorded in banks with total absence of women in management or marginal share. This may indicate that women are less prone to risk and their behaviour is more cautious compared to men working in the boards of cooperative banks.

Źródło:

Security, Economy & Law; 2018, 1/2018 (XVIII)
2353-0669

Pojawia się w:

Security, Economy & Law

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 92.

Tytuł:

Air conditioning systems in data center

Autorzy:

Grzebielec, Andrzej
Kłos, Natalia

Powiązania:

https://bibliotekanauki.pl/articles/132006.pdf

Data publikacji:

2020

Wydawca:

Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.

Tematy:

air conditioning
datacenter
energy efficiency

Opis:

Data center cooling is a specific issue. High heat flux density and maintaining rigorous operating conditions require suitable cold from the cooling system. The article lists the most common methods of data center cooling and classification of technological systems in data center facilities.

Źródło:

Modern Engineering; 2020, 1; 26-37
2450-5501

Pojawia się w:

Modern Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 93.

Tytuł:

Experimental study of a sorption cold storage supporting the air conditioning system

Autorzy:

Grzebielec, Andrzej
Szelągowski, Adam

Powiązania:

https://bibliotekanauki.pl/articles/132075.pdf

Data publikacji:

2019

Wydawca:

Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.

Tematy:

adsorption
energy efficiency
cold storage

Opis:

Techniques related to elimination of environmental pollution are divided into two main trends. These are primary and secondary solutions. Primary solutions are based on the creation / selection of technologies that do not emit pollutants, secondary solutions are used in the situation that pollutants are already generated. Elimination is made by selected technological processes. When using residential, office or industrial buildings, emissions are primarily associated with the use of energy carriers such as electricity, heat or cold. During electricity production, pollution is related mostly to the atmosphere degradation. Thus, any solution that reduces energy consumption or improves the energy efficiency of buildings is the primary method of environment protection. This article proposes and investigates an idea of cold storage system based on an adsorbent bed (silica gel), which aims to reduce the energy consumption of the domestic air conditioning system. As a result of experimental research, it was shown that for a building with a volume of 1000m 3 and multiples of air exchanges at 0.5 level, a silica gel bed with a volume of 1.63 m3 is required in order to continuously unload the air conditioning system for 8 hours (while outside air temperature exceeding 25oC).

Źródło:

Modern Engineering; 2019, 1; 10-15
2450-5501

Pojawia się w:

Modern Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 94.

Tytuł:

Analysis of properties of a laboratory model of a Gamma Stirling engine

Autorzy:

Fekieta, D.

Powiązania:

https://bibliotekanauki.pl/articles/115503.pdf

Data publikacji:

2013

Wydawca:

Fundacja na Rzecz Młodych Naukowców

Tematy:

Stirling engine
efficiency
mechanical power

Opis:

The main subject of the article is the analysis of the characteristics of a Stirling engine. The article presents a general principle of operation of the engine, its basic types and properties. The paper contains a description of the construction of a laboratory model of the engine and the results of the experimental studies. The basic criterion which guided the designing and building the engine was to maximize the energy density, efficiency, while minimizing the cost of materials – to this end the engine has been designed and constructed so as to allow replacement of particular components. The conducted experimental studies have shown that the best parameters of the engine has a cylinder made of iron, a steel flywheel and a steel radiator. The brake efficiency of the engine for this configuration was 16%.

Źródło:

Challenges of Modern Technology; 2013, 4, 1; 47-52
2082-2863
2353-4419

Pojawia się w:

Challenges of Modern Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 95.

Tytuł:

Human factors in visual quality control

Autorzy:

Kujawińska, A.
Vogt, K.

Powiązania:

https://bibliotekanauki.pl/articles/407375.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

production
process efficiency
visual inspection

Opis:

Visual control (visual inspection) is often used in production because - in comparison to other kinds of control - it is relatively easy to conduct. It does not require any specialized technical equipment. Human senses, usually sight, are the measurement tool. Unfortunately, visual control does not guarantee a fully correct assessment. The reason is the limited human reliability. There are plenty of factors which influence ability of a human to assess the process or product quality properly. An important group of them are ergonomic factors. The goal of the paper is to identify and discuss their influence on the efficiency of the visual quality control in manufacturing processes. The research was carried out in manufacturing company from automotive industry. The paper presents the investigation of work organizational factors influence on visual control effectiveness. A controller can make two types of errors in the process of visual inspection: to assess a conforming product as “defective” or to assess a non-conforming product as “good”. Effectiveness of sequential visual controls in selected process was examined. As a measure of visual control effectiveness Control First Pass Yield index was defended. Three operations were analyzed: assembly of components, melting components and applying a protective coating.

Źródło:

Management and Production Engineering Review; 2015, 6, 2; 25-31
2080-8208
2082-1344

Pojawia się w:

Management and Production Engineering Review

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 96.

Tytuł:

Evaluating the working efficiency of transportation means at meat processing works

Autorzy:

Marczuk, A.

Powiązania:

https://bibliotekanauki.pl/articles/242099.pdf

Data publikacji:

2009

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

transport
work efficiency
meat processing

Opis:

Transportation works are important link of every production activity and they considerably affect the producing costs. The study present the analysis of working efficiency of transportation means using the example of meat processing factory. To solve the problem, the structure of transporting routes covered at analyzed works, number and localization of goods receive sites as well as the amounts and types of transportation means used must have been determined. Then the software making possible to evaluate the efficiency of transportation means work at a production facility was worked out. Calculations were performed using data from meat processing works in Górno. The work efficiency results for particular vehicles used to transport produced goods to shops were presented in a form of indicators in tables. Performed study revealed that mean amount ofcarriages under analyzed conditions was 0.492 t, average effective work time 1.39 h, average operative work time 6.5 h, mean uploading and unloading time 2.2 h. Average efficiency of transportation means during the effective time was 0.37 t/h, while during operative time 0.07 t/h, mean labor inputs 10.9 working hours, mean distance coveredwith no load 36.9 km, whereas with a load 69.3 km.

Źródło:

Journal of KONES; 2009, 16, 3; 251-258
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 97.

Tytuł:

Ocena efektywności zwrotnego mechanizmu finansowego JESSICA w województwie śląskim - prognoza
Efficiency Assessment of JESSICA in Silesia – Forecast

Autorzy:

Kościelniak, Helena
Górka, Mateusz

Powiązania:

https://bibliotekanauki.pl/articles/906374.pdf

Data publikacji:

2012

Wydawca:

Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego

Tematy:

JESSICA
revolving mechanisms,
efficiency assessment

Opis:

JESSICA [Joint European Support for Sustainable Investment in City Areas] – is an initiative developed by the European Commission and the European Investment Bank, in collaboration with the Council of Europe Development Bank (CEB). Its aim is to support sustainable urban development investments. In Poland the initiative finances projects eligible within Regional Operational Programmes in the priorities related with urban regeneration. Within JESSICA, special Urban Development Funds or Holding Funds are established in order to support projects, forming part of local regeneration programmes with the application of financial instruments and structural funds. JESSICA has been developed as an answer to the development needs of urban areas, having the key importance for local, regional and national growth, at the same time being an initiative supporting profitable projects only. JESSICA beneficiaries have access to advantageous financial instruments that may vary depending on the region [equity, loans and/or guarantees]. The basic aim of the paper is to define the implementation scope of the JESSICA revolving mechanism and to present an attempt at evaluating its efficiency in Silesia.

Źródło:

Acta Universitatis Lodziensis. Folia Oeconomica; 2012, 267
0208-6018
2353-7663

Pojawia się w:

Acta Universitatis Lodziensis. Folia Oeconomica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 98.

Tytuł:

An Energy-Efficient Proactive Routing Scheme for MANET : Game Theoretical Approach of Forwarding with Selfish Nodes

Autorzy:

Sahnoun, A.
Habbani, A.
El Abbadi, J.

Powiązania:

https://bibliotekanauki.pl/articles/963872.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

game theory
MANETs
energy efficiency

Opis:

In Mobile Ad-hoc Networks, nodes exchange packets with each other using intermediate nodes as relays. Since nodes in MANETs are battery powered, energy conservation is a crucial issue. Accepting relay all request may not be in the best interest of a node. But if many nodes prefer not to consume energy in relaying packets on behalf of others, the overall performance of routing in network will be influenced. In this paper we address the energyefficient routing problem in MANETs with selfish nodes. We modeled this problem as a game-theoretic constraint optimization; we defined the utility of each node as a weighted difference between a performance metric and some transmission costs. A motivate mechanism is proposed in order to induce nodes to forwarding cooperation. Each node independently implements the optimal equilibrium strategy under the given constraints. Simulation results by NS3 simulator show that our proposed approach can improve system performance in network lifetime and packet delivery ratio.

Źródło:

International Journal of Electronics and Telecommunications; 2017, 63, 4; 399-404
2300-1933

Pojawia się w:

International Journal of Electronics and Telecommunications

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 99.

Tytuł:

Relations of latent anthropometric dimensions to success in judo bout

Autorzy:

Sertić, Hrvoje
Segedi, Ivan

Powiązania:

https://bibliotekanauki.pl/articles/1054597.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego

Tematy:

morphology
score
technical efficiency
victory

Opis:

The global objective of this research was determining the relations between anthropometric variables with success in judo bout. The research was conducted on a sample of 122 subjects. The sample of variables consisted of 18 anthropometric measures, out of which three latent dimensions were isolated by the use of factor analysis. Three latent dimensions (factors) represent a set of predictive variables. Criterion is defined as a success in judo bout and it is represented by two criteria variables; number of wins and technical efficiency in judo bout. To test the relations of latent anthropometric variables with success in the bout the regression analysis was used. Statistically significant but low connections were found between anthropometric variables and the two criteria. As only the factor volume and mass of the body partially contribute to the explanation of criteria, one can conclude that the active muscle mass is in the background of achieved connection.

Źródło:

Central European Journal of Sport Sciences and Medicine; 2014, 8, 4; 73-81
2300-9705
2353-2807

Pojawia się w:

Central European Journal of Sport Sciences and Medicine

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 100.

Tytuł:

Economic Efficiency of Rice Farming A stochastic frontier analysis approach

Autorzy:

Aboaba, Kazeem

Powiązania:

https://bibliotekanauki.pl/articles/1891834.pdf

Data publikacji:

2020-12-29

Wydawca:

Uniwersytet Przyrodniczy w Poznaniu. Wydawnictwo Uczelniane

Tematy:

Economics efficiency
Return to scale

Opis:

The future of agriculture is dependent on increase in the use of resources at disposal, it is therefore imperative that strategies to increase agricultural growth should be directed towards increasing efficiency of smallholder farming operations and resource utilization. This study examined the economic efficiency of rice production. Multistage sampling procedure was used to select 240 rice farmers with the aid of a structured questionnaire. Data collected were analyzed with descriptive techniques, Stochastic Frontier Analysis (SFA) and Tobit regression model. The SFA result revealed that input variables such as seed, herbicide and pesticide were positive and had significant effect on rice output. The rice farmers were able to maximize their output by 74% at lowest minimum cost possible. Furthermore, economic efficiency was positively influenced by age, level of education, membership of farmers association, access to public market and access to health facilities while household size, farming experience, bad road condition and distance to nearest market had negative effects. The study concluded that rice farmers were inefficient. Therefore, in order to raise rice production efficiency and improve the livelihood of smallholder farmers, farmers should attend formal and informal education as it is a key policy issue in the study area, farmers should strengthen the existing association structures and organize new farmer’s associations. Also, the local and regional governments were encouraged to provide good road networks, and public market that will enable farmers dispose their produce at attractive places and prices of their choice.

Źródło:

Journal of Agribusiness and Rural Development; 2020, 58, 4; 423-435
1899-5241

Pojawia się w:

Journal of Agribusiness and Rural Development

Dostawca treści:

Biblioteka Nauki

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