Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "technical efficiency" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 106
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
Artykuł
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
Artykuł
Tytuł:
Kriterijj vybora racional'nojj tekhnologii dostavki sel'skokhozjajjstvennykh gruzov
The criteria of choice of a rational technology of delivery the agricultural goods
Autorzy:
Muzyljov, D.
Karnaukh, N.
Berezchnaja, N.
Kut'ija, O.
Powiązania:
https://bibliotekanauki.pl/articles/77354.pdf
Data publikacji:
2015
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
agricultural product
cost
harvest
delivery
technical efficiency
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2015, 17, 7
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
SUBSAMPLING APPROACH FOR STATISTICAL INFERENCE WITHIN STOCHASTIC DEA MODELS
Autorzy:
Prędki, Artur
Powiązania:
https://bibliotekanauki.pl/articles/453043.pdf
Data publikacji:
2013
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
DEA method
technical efficiency
statistical inference
subsampling
Opis:
In the current literature, many different stochastic extensions of the DEA framework can be found. Such generalized approaches enable one to model the uncertainty inherent to the form of the production possibility set and the value of the technical efficiency measure at any given point of the former. In the paper we provide a detailed discussion of some statistical model and the subsampling algorithm which are used in statistical inference. The methodology is then illustrated with an empirical example using the real-world data from the Polish energy sector.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2013, 14, 2; 158-168
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Economic analysis of artificial insemination in broiler pro-duction in Oyo State, Nigeria
Autorzy:
Akinsola, Grace Oluwabukunmi
Adewumi, Matthew
Falola, Abraham
Ojediran, Ezekiel
Jimoh, Abiodun
Powiązania:
https://bibliotekanauki.pl/articles/1891894.pdf
Data publikacji:
2020-11-08
Wydawca:
Uniwersytet Przyrodniczy w Poznaniu. Wydawnictwo Uczelniane
Tematy:
artificial insemination
gross margin
poultry
technical efficiency
Opis:
Artificial Insemination (AI) in poultry production is a veritable technique in solving the problem of breeding and meeting the increasing demand. This study assesses the economics of artificial insemination in broiler production among sixty randomly selected broiler farmers in Nigeria. The analytical techniques employed include descriptive statistics, gross margin analysis, and stochastic frontier.  The result discovered that most of the farmers are male and are at their prime age. Majority of the livestock farmers have some form of formal education and a minimum of 5 (five) year experience in poultry farming. The capital was mostly sourced from the bank. Majority of the farmers has a stock size of more than 25,000 birds. They have a gross margin of N341, 933,406. Only 20% of gross income was used for operating expenses with a return on capital invested of 4.3. The mean technical efficiency was 80.70%. Feed, vaccine and stock size were statistically significant in determining efficiency while education and extension visits are the statistically significant variable influencing technical inefficiency. It is therefore recommended that affordable and accessible input, as well as training should be made available to farmers to achieve self-sufficiency and improve the economy.
Źródło:
Journal of Agribusiness and Rural Development; 2020, 57, 3; 249-254
1899-5241
Pojawia się w:
Journal of Agribusiness and Rural Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Techniczna sprawność działań proinnowacyjnych w Polsce z perspektywy Unii Europejskiej
Technical Efficiency of Innovations in Poland from EU Perspective
Autorzy:
Nasierowski, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/574297.pdf
Data publikacji:
2019-12-27
Wydawca:
Szkoła Główna Handlowa w Warszawie. Kolegium Analiz Ekonomicznych
Tematy:
innowacje
DEA
techniczna sprawność
technical efficiency
innovations
Opis:
This paper presents the results of an assessment of technical efficiency of innovations in European Union. Data Envelopment Analysis was used to investigate this subject. Results of simulation experiments were used to anticipate possible suggestions regarding policy measures that may be considered when exploring means to improve the Polish performance. Polish technical efficiency of innovations is below that in the European Union. Poland operates decreasing returns to scale. Special attention should be directed to education, research, and support to SMEs. It is essential to undertake legal changes relative to innovation activities and the attitudes of Poles towards innovativeness in order to improve results. In general the national Innovation System needs to be corrected [or improved]. The key aspect of improvement rests with congestion: overinvestment or inappropriate use of resources. Suggestions for further research of the subject and improvement of the National Innovation System are presented.
W opracowaniu tym przedstawiono wnioski z oceny technicznej sprawności innowacji w krajach Europy. W analizie wykorzystano metodę Data Envelopment Analysis, wspierając ją symulacją dla wskazania zakresów działań proinnowacyjnych, które charakteryzują się niską sprawnością realizacji. Techniczna sprawność innowacji w Polsce jest niższa niż innych krajów w analizowanym zbiorze. Polska działa w obszarze zmniejszających się zwrotów z tytułu skali. Szczególną uwagę poświęcić należy edukacji, badaniom i wspieraniu MŚP. Należy podjąć działania w kierunku zmiany obecnego systemu prawnego i nastawienia Polaków do innowacji, jeżeli oczekuje się poprawy sprawności działań proinnowacyjnych w przyszłości. Aby poprawić techniczną sprawność innowacji w Polsce, należy również usprawnić Narodowy System Innowacyjności. Podstawowym czynnikiem obniżającym techniczną sprawność innowacji w Polsce jest przeinwestowanie (i/lub marnotrawstwo nakładów na innowacje). W podsumowaniu podano sugestie kierunków dalszych prac badawczych nad poprawą funkcjonowania Narodowego Systemu Innowacyjności.
Źródło:
Gospodarka Narodowa. The Polish Journal of Economics; 2019, 300, 4; 79-104
2300-5238
Pojawia się w:
Gospodarka Narodowa. The Polish Journal of Economics
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
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
Artykuł
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
Artykuł
Tytuł:
Membership in agricultural producer organizations and farm technical efficiency in Slovakia
Autorzy:
Bartova, Lubica
Fandel, Peter
Powiązania:
https://bibliotekanauki.pl/articles/22444410.pdf
Data publikacji:
2020
Wydawca:
Instytut Badań Gospodarczych
Tematy:
farms
producer organizations
technical efficiency
metafrontier
RDP support
Opis:
Research background: EU National Rural Development Programs (RDPs) support food chain organization, including the establishment of agricultural producer organizations (APOs) to assist the cooperation among small- and medium-sized farms and improve their performance. Purpose of the article: We assessed how membership in an APO affects technical efficiency in a sample of Slovak farms. We break down our results by the type of membership (non-members, long-term members, and members of newly established APOs, benefitting from the RDP support) and production specialization of farms (crops, livestock, unspecialized). We expected a positive effect of membership on farm performance, although with differences by production specialization. Methods: We analyzed cross-sectional data of 645 farms in Slovakia in 2014, when the 2007?2013 RDP support was over. We applied a DEA-based two-stage metafrontier approach. During the first stage, we estimated group-specific efficiency and calculated adjusted (target) values of inputs, given the outputs. During the second stage, we estimated the meta-technical efficiency of farms relative to the metafrontier derived from pooled adjusted inputs and outputs of farm groups by their membership within production specialization. The meta-efficiency indicates farm efficiency associated with membership in a producer organization. We examined the differences between meta-efficiency by membership groups by the Kruskal-Wallis and post hoc Dunn?s tests. Findings & Value added: Members of APOs were mainly large farms. Membership in newly established APOs, benefitting from of the RDP support, contributed significantly to higher technical efficiency of livestock and crop farms. Their performance was, however, affected by managerial and scale inefficiencies. Well-performing farms with good farm management had joined APOs already before the year 2007. However, the long-term APO membership did not improve farm technical efficiency significantly. Public support of farm cooperation should be designed to improve the governance, sustainability of the APO activities, and performance of their members.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2020, 15, 3; 489-509
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A MULTI-PRODUCT VERSION OF THE DEA+ METHOD
Autorzy:
Prędki, Artur
Powiązania:
https://bibliotekanauki.pl/articles/453852.pdf
Data publikacji:
2014
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
DEA+
semiparametric frontier model
production function
technical efficiency
Opis:
The paper presents the DEA+ method as a tool for estimating the production function and the measure of technical efficiency in data points. A multi-product case is considered. Presentation of the underlying semiparametric frontier model is followed by demonstration of the very algorithm of DEA+ and a discussion of its validity. Finally, the method is illustrated with an empirical example with selected model distributions for each random variable constituting the composed error.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2014, 15, 2; 317-329
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
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
Artykuł
Tytuł:
Benchmarking technical efficiency of Nigerian seaports
Autorzy:
Nze, Obiageli N.
Ejem, Ejem Agwu
Nze, I. C.
Powiązania:
https://bibliotekanauki.pl/articles/2141057.pdf
Data publikacji:
2020
Wydawca:
Fundacja Centrum Badań Socjologicznych
Tematy:
Nigerian seaports
sustainable development
ship traffic
benchmarking technical efficiency
Opis:
The study adopted ex post facto design. Using ship traffic, vehicle traffic, berth efficiency, turnaround time as input explanatory variables and output factors as average throughput to compare the pre concession and post concession. The six Nigerian ports: Tincan Island Ports, Apapa Port, Port of Delta Warri, Calabar Port, Rivers Port and Onne Port were sampled. It is observed that year 2014 is the most efficient year out of the 36 operation years in terms of output maximization with constant levels of inputs under the study period with score 1.0 respectively serving as 32 times benchmark for other years. It is observed from that Tin Can Island Port was technically efficient in the operation years of 1980, 1981, 1985, 1995, 1997, 1998, 2009, 2013, 2014 and 2015 with score 1.0. However, the most efficient operation years are 1998 and 2013 while the most inefficient year is with efficiency score 1.0. The post-concession years that the port was technically inefficient are 2006, 2007, 2008, 2010, 2011 and 2012.
Źródło:
Journal of Sustainable Development of Transport and Logistics; 2020, 5, 1; 77-95
2520-2979
Pojawia się w:
Journal of Sustainable Development of Transport and Logistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stochastic frontier analysis of regional competitiveness
Autorzy:
Furková, Andrea
Surmanová, Kvetoslava
Powiązania:
https://bibliotekanauki.pl/articles/453463.pdf
Data publikacji:
2011
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
Stochastic Frontier Analysis
Technical Efficiency
NUTS2 regions
Competitiveness
Opis:
The regional competitiveness is the source of national competitiveness and the efficiency measuring and relative regional efficiency comparison are crucial questions for analysts as well as for economic policy creators. Regional competitiveness becomes a subject of evaluation due to increasing significance of regions in concept of European Union. This paper deals with the application of parametric benchmarking method – Stochastic Frontier Analysis (SFA) for measuring technical efficiency of NUTS2 regions of V4 countries within the time period of 8 years.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2011, 12, 1; 67-76
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 106

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies