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Tytuł:
Effect of Karanja biodiesel blends on the characteristics of diesel engine
Autorzy:
Yadav, Sandeep
Kumar, Amit
Chaudhary, Abhilasha
Powiązania:
https://bibliotekanauki.pl/articles/2176951.pdf
Data publikacji:
2022
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
Diesel engine
Karanja biodiesel
performance
combustion
emission
silnik Diesla
biodiesel Karanja
wydajność
spalanie
emisja
Opis:
Extensive research is being conducted to create and use a wide range of alternative fuels to accommodate the world's growing energy needs. The objective of this experimental investigation was to analyze the effects of Karanja biodiesel blends on the performance, combustion, and emission characteristics of a compression ignition (CI) engine vis-a-vis neat diesel. Important physical parameters of Karanja oil were examined experimentally after transesterification and determined to be within acceptable limits. BTE of Karanja biodiesel blends was about 3-8% lower than diesel. For Karanja biodiesel blends, BSFC was about 2-9% higher than diesel but exhaust gas temperature and volumetric efficiency were lower. Emissions characteristics such as nitrogen oxides, hydrocarbons, and carbon monoxide were also analyzed for various tested fuels. Karanja biodiesel blends resulted in lesser CO and HC formation. Nonetheless, NOx emissions were around 10% greater than diesel. Peak cylinder pressure, heat release rate, and maximum rate of pressure rise versus crank angle were among the combustion characteristics parameters considered in this study. Combustion analysis revealed that for Karanja biodiesel blends heat release rate and peak cylinder pressure were lower than for neat diesel. Findings indicate that Karanja biodiesel can be considered a viable diesel engine fuel.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2022, 115; 249--264
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Niejednoznaczności coachingowych narracji o efektywności. Implikacje etyczne i antropologiczne
Ambiguity of coaching narrations about efficiency. Ethical and antrhropological implications
Autorzy:
Woszczyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/324587.pdf
Data publikacji:
2017
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
coaching
rozwój
wydajność
efektywność
potencjał ludzki
wartości
redukcjonizm
holizm
development
performance
efficiency
human potential
values
reductionism
holism
Opis:
Prezentowane refleksje zmierzają do objaśnienia istoty coachingu, który nie zawsze jest właściwie rozumiany. Artykuł pokazuje wybrane problemy z opisem procesu coachingowego dokonywanymi w terminach efektywności, wydajności oraz maksymalizacji ludzkiego potencjału. Charakterystyki wartościowe w narracjach marketingowych mogą implikować instrumentalizację klienta. Jako istotowy warunek procesu coachingowego ukazane zostało podejście niedyrektywne oraz samoświadomość.
Presented reflections are intended to clarify the essence of coaching, which is not always properly expounded. The article shows some problems of description coaching in terms of effectiveness, performance and human potential maximizing. Characteristics valuable in marketing point of view may imply reductionism and instrumentalising of coachee. The importance of non-directivity and self-reflexivity has been emphasized as an essential condition in coaching process.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2017, 112; 431-441
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technical and organisational conditions in the management of recovery and recycling processes of waste batteries and accumulators
Autorzy:
Wengierek, Maria
Powiązania:
https://bibliotekanauki.pl/articles/2032992.pdf
Data publikacji:
2021
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
hazardous waste
waste recovery
recycling
efficiency
recycling technology
waste battery
accumulator
plants
odpady niebezpieczne
odzyskiwanie odpadów
recykling
wydajność
technologia recyklingu
zużyta bateria
akumulator
zakłady
Opis:
Introduction/background: Waste batteries and accumulators are hazardous waste and should not be sent to landfill sites. Their presence in the waste mixture causes the release of dangerous heavy metals into the natural environment. Aim of the paper: The aim of the study is to review the processes currently used in the recycling of used batteries and accumulators, currently used in the world and in Poland, as well as installations and technologies, depending on the types, kinds and physicochemical properties of waste, and to draw attention to the ventures to prevent waste generation. Materials and methods: The paper discusses the nature of waste, storage and transport conditions, organisation of collection, processes and processing technology. The article presents examples of waste management facilities dealing with recovery and recycling of batteries in Poland and Silesia. The research was based on an analysis of legal acts, statistical data, professional literature and company experiences. The second part is a case study. Selected environmental systems presented on descriptive models are based on the results of an environment (region) system analysis. Results and conclusions: EU directives and national law force the reuse of raw materials used in their production. Therefore, one should strive to apply the most effective technologies of waste recovery and recycling. The most recommended and cost-effective is product salvage followed by material recovery, especially of scarce, rare and precious earth metals. Various processes and technologies (installations) for the recovery of raw materials from waste batteries and accumulators are used around the world. The best known are: Jogmec, Batrec, Recytec, Accurec, Everead, Inmetco, Sab-Nife, Snam-Savam, Citron, Batenus, TNO. Long battery life minimises the amount of waste, and thus reduces the burden on the environment. Therefore, in the process of producing batteries, it is important to improve the technology already at the production stage. An example is the Polish experience (Europower; Tuborg; Tuborg-Silver).
Źródło:
Organizacja i Zarządzanie : kwartalnik naukowy; 2021, 1; 137-157
1899-6116
Pojawia się w:
Organizacja i Zarządzanie : kwartalnik naukowy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effects of food and drink intake to driving performance: a systematic review
Autorzy:
Sutalaksana, Iftikar Zahedi
Pratama, Gradiyan Budi
Yamin, Putra Alif Ramdhani
Soetisna, Herman Rahadian
Powiązania:
https://bibliotekanauki.pl/articles/374354.pdf
Data publikacji:
2019
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
drink
driving error
driving performance
food
intake
błąd jazdy
wydajność jazdy
jedzenie
spożycie
Opis:
Human-related factors are considered to be the main cause of traffic incidents or accidents, causing 69.70% of the incidents. Several studies have been conducted to identify the relationship between drowsiness or fatigue and driving performance. Furthermore, a number of other studies not only discussed the symptoms causing drowsiness but also tried to investigate related factors that cause sleepiness or fatigue while driving. On the other hand, some discussed the quantity and quality of sleep as well as food and drink intake before and while driving. This systematic review, which is based on the PRISMA method, aims to map previous studies that investigated the effect of different food/drink consumption, either taken prior to driving or while driving, on the on-road driving characteristics of drivers. Furthermore, this article is expected to serve as a reference for further research that could potentially contribute to minimizing driving errors that lead to incident or accident. From 1871 articles screened, 7 studies related to food/drink intake and driving performance were reviewed. On the basis of the existing studies, no real evidence showing the presence of the association between food intake and the monotony of the road to decrease the driving performance has been found; therefore, further research is needed.
Źródło:
Transport Problems; 2019, 14, 1; 5-12
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model wydajnego i skalowalnego systemu integracji
Model of efficient and scalable integration system
Autorzy:
Stachowiak, M.
Hnatkowska, B.
Powiązania:
https://bibliotekanauki.pl/articles/321909.pdf
Data publikacji:
2017
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
integracja systemów
architektura
broker integracyjny
protokół komunikacyjny
wydajność
skalowalność
dostępność
niezawodność
system integration
architecture
integration broker
communication protocol
performance
scalability
availability
reliability
Opis:
Niniejsza praca rozwiązuje problem projektu wydajnej i skalowalnej architektury systemu integracyjnego oraz doboru odpowiednich komponentów do jej praktycznej realizacji. Na podstawie przeprowadzonej analizy porównawczej różnych realizacji platform integracyjnych, bazujących na zaproponowanej architekturze wskazano, że w celu zastosowania modelu przesyłania komunikatów typu punkt-punkt najszybszym brokerem integracyjnym jest RabbitMQ, w połączeniu z protokołem AMQP. Dla modelu przesyłania komunikatów publikuj-subskrybuj, brokerem, który najszybciej przesłał określoną liczbę wiadomości jest Apache Kafka, z własnym dedykowanym protokołem.
This thesis solves the problem of designing an efficient and scalable architecture of the integration system and selecting the appropriate components for its practical implementation. Based on the research conducted on integration platforms consisting of specially selected components, it was pointed out that in order to implement the point-to-point messaging model, the fastest integration broker is RabbitMQ, in combination with the AMQP protocol. For the publishsubscribe messaging model the fastest broker is Apache Kafka, with its own dedicated protocol.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2017, 113; 435-446
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of pilots’ tiredness on the outcome of psychological testing
Autorzy:
Socha, Vladimir
Hanakova, Lenka
Freigang, Michal
Kraus, Jakub
Stojic, Slobodan
Socha, Lubos
Hanak, Peter
Powiązania:
https://bibliotekanauki.pl/articles/375429.pdf
Data publikacji:
2019
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
human factors
fatigue
psychological testing
performance
pilot
flight symulator
wskaźniki ludzkie
zmęczenie
test psychologiczny
wydajność
symulator lotu
Opis:
Presented work is primarily oriented on the experimental verification of the influence of fatigue on the psychological condition of the flying personnel, using psychological and performance tests. For the evaluation of a pilot performance, the 24 hours experiment was conducted. In total, eight subjects participated in the experimental measurements. Eight participants went through several tests, including simulator flights, to investigate the effects of the fatigue on the results of psychological measurements. Measurements included workload evaluation, using NASA task load evaluation concept and performance testing, using the so-called OR-test. Significant statistical differences between measurements performed during 24 hours were not found in the case of NASA task load Scores. In the case of OR-test, Friedman ANOVA and subsequent post-hoc analysis show that the greatest decrease in performance was observed in approximately 22 hours of wakefulness, i.e. approximately in half of the measuring process. The concept of 24-hour measurements for the quantification of fatigue is not commonly used yet as well as objectivization using performance testing. As the apparent effect of fatigue is mainly on performance testing results, it can be argued that this work could serve as a basis for further studies on fatigue. Also, it could serve as a support for introducing new pilots' psychological testing procedures in the future, which could contribute to current efforts to improve aviation safety.
Źródło:
Transport Problems; 2019, 14, 2; 55-67
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vehicle relocation efficiency - a case study of the parking company in the City of Zagreb
Autorzy:
Šimunović, Ljupko
Protega, Veselko
Ćosić, Mario
Bandov, Davor
Powiązania:
https://bibliotekanauki.pl/articles/2098120.pdf
Data publikacji:
2021
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
transport process efficiency
indicators of transport vehicle utilisation
systematic and integrated evaluation of the productivity
wydajność procesu transportowego
wskaźniki wykorzystania środków transportu
systematyczna ocena produktywności
zintegrowana ocena produktywności
Opis:
There is a need for vehicle relocation, whether for delivering new vehicles to their selling destinations, pulling inoperative or damaged vehicles out of traffiic, or removing illegally parked vehicles from the street. The relocation of illegally parked vehicles in the City of Zagreb is done by constantly monitoring parked vehicles or through citizen telephone alerts. The paper analyses the vehicle relocation service of the Zagrebparking company, which, in addition to overseeing car park management in public car parks and garages, is in charge of removing illegally parked vehicles. Due to the cyclic nature of its operations, a high share of empty rides, high vehicle investment costs, small quantities of cargo transported, high fuel prices, and high fuel consumption in the urban environment, Zagrebparking’s Vehicle Relocation Department operates with unnecessarily high costs. In this paper, vehicle relocation efficiency is analysed by presenting indicators of vehicle utilisation as part of a systematic evaluation of the company. Improvements to the current service are also provided.
Źródło:
Transport Problems; 2021, 16, 1; 39--50
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the freight transnational rail liner service on the train scheduling in case of major corridors
Wpływ serwisu linii towarowych kolei transnarodowych na harmonogramowanie pociągów w głównych korytarzach
Autorzy:
Popa, M.
Raicu, S.
Costescu, D.
Rosca, E.
Powiązania:
https://bibliotekanauki.pl/articles/374619.pdf
Data publikacji:
2013
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
transnational liner service
rail corridor
corridor capacity
train scheduling
serwis linii transnarodowych
korytarz kolejowy
wydajność korytarza
harmonogramowanie pociągów
Opis:
In this paper we discuss several consequences of the freight transnational rail liner service on the rail corridor capacity. The Northern part of the IVth TEN-T corridor on Romanian territory has specific feature related to the passenger flows connecting important Romanian demographic and economic clusters, on one side, and on the other side, to its diagonal crossing aspect, from the Western border to the Constanta port, connecting the Central Europe countries to the Black Sea regions, which means that there are a lot of expectation in terms of this corridor rail capacity: this corridor will, be for a long time further, the single and first completed continuous upgraded and modernised rail corridor. Its utilization will necessarily be heterogeneously planned (meaning for passengers rapid trains and freight rapid trains, from domestic/internal market, but especially for external market of Romania). In this paper, we consider a simple mathematical model for the calculus of capacity in two different cases: for a homogeneous utilization, meaning that all trains have the same running speeds and for heterogeneous utilization, when the passenger trains have the higher speed and hence, the higher priority over the freight trains, even if some of them are freight transnational liner service. Special feature of liner rail service has to be considered (fixed schedule, no stops for passenger train advance). We draw several useful possible solutions to be considered in order to preserve the active corridor capacity, and to assure a smooth flow for the transnational liner services, which ultimately will enhance the rail attractiveness.
W artykule przedyskutujemy wpływ serwisu międzynarodowego, kolejowego transportu towarów na przepustowość korytarzy. Północna część IV-tego korytarza TEN-T na terytorium Rumunii posiada specyficzne cechy oparte o przepływy pasażerów łącząc ważne demograficznie i ekonomicznie ośrodki Rumunii, z jednej strony, a z drugiej strony o diagonalny aspekt skrzyżowań ze wschodniej granicy do portu Konstanca, łącząc centralne kraje Europy z regionami Morza Czarnego, co oznacza wielkie oczekiwania związane z przepustowością korytarzy kolejowych. Rozważamy prosty matematyczny model obliczania przepływu w dwóch różnych przypadkach - dla jednorodnego wykorzystania, co oznacza, że wszystkie pociągi mają taka samą prędkość przebiegu oraz niejednorodne wykorzystanie, kiedy pociągi pasażerskie maja większą prędkość i stąd wyższy priorytet niż pociągi towarowe, nawet jeśli niektóre z nich są międzynarodowymi liniami towarowymi. Dla tej ostatniej sytuacji zostało narysowanych kilka użytecznych, możliwych rozwiązań rozpatrywanych w szczególności by chronić aktywny przepływ korytarzy, oraz by zabezpieczyć płynny przepływ dla serwisu linii transnarodowych, które w końcu uwydatnią atrakcyjność kolei.
Źródło:
Transport Problems; 2013, 8, 3; 93-100
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metody zwiększania wydajności w zakładzie produkcyjnym – studium przypadku
Methods of increasing efficiency in the production plant – case study
Autorzy:
Ostapko, B.
Powiązania:
https://bibliotekanauki.pl/articles/324337.pdf
Data publikacji:
2018
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
kluczowe wskaźniki efektywności
KPI
wydajność
zarządzanie produkcją
zarządzanie operacyjne
strategia
key performance indicators
efficiency
production management
operational management
strategy
Opis:
Artykuł przedstawia studium przypadku dla zakładu produkcyjnego w którym w latach 2008-2014 zwiększano poziom wydajności. Dokonano analizy obszarów w których podjęto działania operacyjne i strategiczne mające na celu zwiększenie wolumenów produkcyjnych i wykorzystania maszyn oraz zmniejszenia zużycia paliw i energii.
The article presents a case study for a production plant in which the level of efficiency was increased in 2008-2014. An analysis was made of the areas in which operational and strategic actions were taken to increase production volumes and use of machines as well as to reduce fuel and energy consumption.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2018, 118; 433-444
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of the challenges facing use of information and communications technology on inventory management amongst breweries in Nigeria
Autorzy:
Odesola, O. T.
Akinola, G. O.
Powiązania:
https://bibliotekanauki.pl/articles/326703.pdf
Data publikacji:
2018
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
inventory
performance
efficiency
ICT challenges
inventory management systems
inwentaryzacja
wydajność
efektywność
wyzwania ICT
systemy zarządzania zapasami
Opis:
Information and communications technology (ICT) in the recent times has become a viable strategic policy option adopted by many businesses in order to compete favourably in a competitive and dynamic ICT driven market. This strategic move by business organizations is being hindered by some challenges which has invariably reduced the benefits accruable from ICT deployment for business operations especially in the inventory management. The paper identified challenges facing the use of ICT for inventory management by firms in the Nigerian Brewery industry. Other objectives of the paper are to x-ray how these challenges had impacted on the inventory management in the Nigerian Brewery industry, the effect of these challenges on customers' satisfaction, relationship between these challenges and inventory costs incurred by firms in the industry, and to suggest appropriate solutions. Primary data formed the methodology of the study. It was established during the field survey that challenges facing the use of ICT had impacted negatively on the performance of inventory management in the Nigerian brewery industry during the period under study. It was also revealed that the cost of software was a major challenge in the industry and that the identified challenges had significant effect on customers' satisfaction of the firms in the Nigerian brewery industry.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2018, 119; 191-207
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A concept of resultant corporate innovativeness assessment model
Autorzy:
Nawrocki, Tomasz L.
Powiązania:
https://bibliotekanauki.pl/articles/1879835.pdf
Data publikacji:
2020
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
corporate innovativeness evaluation
innovativeness
financial performance
efficiency
ocena innowacyjności przedsiębiorstw
innowacyjność
wynik finansowy
wydajność
Opis:
Purpose: The main reason for developing the model was to fulfil the gap in the scope of synthetic/aggregate measure of corporate innovativeness in terms of company’s results in this area and their impact on its performance. Design/methodology/approach: In the proposed concept two aspects have been considered: quantitative and qualitative results of company’s innovation activity (i) and impact of this results on financial performance of company and its efficiency (ii). Due to the fact, that access to information on innovative activities results of companies is highly diversified, proposed model provides two versions to use: one, more general, based on public sources of data (Public Data Approach) and one, more detailed, based on data which should be collected through survey research (Survey Data Approach). The basis for corporate resultant innovativeness model creation was an assumption, that the ultimate market success of the company is not determined by how many innovative solutions it implements and introduces to the market and with what force it does it, but how these solutions will be accepted by the market and what economic benefits the company will receive due to them. Findings: Proposed methodology of innovativeness assessment gives a chance to eliminate several key shortcomings of the so far used methods and concepts of corporate innovativeness measurement and assessment. Research limitations/implications: Input data accessibility, development of knowledge (rules) bases needed to perform fuzzy inference. Practical implications: Presented model gives an opportunity to assess and compare enterprises in terms of their resultant innovativeness and then to assess the impact of this innovativeness on their performance. Social implications: Assessments generated by presented model can be basis for managerial decisions inside the assessed enterprise or investment decisions of investors in the capital market. Originality/value: Original approach for aggregate corporate resultant innovativeness assessment that eliminates several weaknesses of methods used so far.
Źródło:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2020, 144; 363-372
1641-3466
Pojawia się w:
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of provisions for evaluating the effectiveness of urban public passenger transport system
Autorzy:
Mochalin, Sergey
Kasper, Mariya
Nikiforov, Oleg
Levkin, Grigory
Kurshakova, Natali
Powiązania:
https://bibliotekanauki.pl/articles/374370.pdf
Data publikacji:
2019
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
urban public passenger transport
evaluation of the effectiveness
indicators of effectiveness
efficiency
quality
indexation-rating model
factor analysis
miejski publiczny transport pasażerski
ocena skuteczności
wskaźniki efektywności
wydajność
jakość
model indeksacji
analiza czynników
Opis:
The work presents a methodology that allows us to evaluate the effectiveness of the system in accordance with accepted standards in terms of the three components of the “passenger–carrier–department” system, taking into account the interests of each side. The given comprehensive effectiveness evaluation of the urban public passenger transport system shows that a new scientific idea consists in forming fundamentally new sets of indicators for each participant of the system (passenger–carrier–department of transport) that correspond to the conditions of functioning of the urban passenger transport system in Russian Federation. The article presents a classification model for the formation of a basic system of indicators and a functional scheme for grouping and ranking them. The effectiveness of the urban public passenger transport system can be considered separately for each participant in the system from its side, in two directions: horizontal (by year, for example, for an enterprise) and vertical (in the current period for all participants).
Źródło:
Transport Problems; 2019, 14, 1; 45-58
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Condition for application of logistic principles in practice of urban public passenger transport in the city of Omsk
Autorzy:
Mochalin, S.
Kasper, M.
Nikiforov, O.
Levkin, G.
Powiązania:
https://bibliotekanauki.pl/articles/375456.pdf
Data publikacji:
2017
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
passenger public transport
logistic system
logistic principles
efficiency
quality
pasażerski transport publiczny
system logistyczny
zasady logistyki
wydajność
jakość
Opis:
The task of increasing efficiency and quality of public transport has gotten special acuteness for large cities of Russia in connection with expansion of service by commercial carriers. There have no works done on the city of Omsk, where the transport system has its own characteristics. In this paper, characteristics of Omsk urban public transport are researched. The scheme that clearly demonstrates what factors have a negative impact on the development and functioning of the Omsk passenger transport system is developed. The measures that improve the efficiency of the passenger transportation system and provide an opportunity to advance the implementation of logistics principles are proposed. The activities took into account the experience of reforming the public transport system in other cities, the characteristics of the Omsk city system and a view to engagement of other scientists in this field of science.
Źródło:
Transport Problems; 2017, T. 12, z. spec.; 71-86
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the influence of hydrogen on the energy performance of a spark ignition engine using gasoline and bioethanol fuel mixtures
Autorzy:
Mejeras, Gabrielius
Rimkus, Alfredas
Matijošius, Jonas
Powiązania:
https://bibliotekanauki.pl/articles/2098159.pdf
Data publikacji:
2021
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
bioethanol
hydrogen
gasoline
fuel
mixture
consumption
efficiency
bioetanol
wodór
benzyna
paliwo
mieszanka
zużycie
wydajność
Opis:
The results of experimental studies of gasoline mixed with 10% bioethanol (E10), bioethanol mixed with 15% gasoline (E85), and hydrogen– oxygen gas (HHO) supplied as an additional fuel are presented in this paper. Research was carried out to determine whether E85 with hydrogen– oxygen gas is feasible for use as a replacement fuel. During the test, a port injection HR16DE spark ignition engine was used. Experiments were carried out at a constant engine speed (n = 2000 rpm), throttle opened at 15°, using a stoichiometric mixture λ = 1.0 and a lean mixture λ = 1.1. After determining brake torque, fuel consumption data, and energy performance, the results of various fuels were determined. It was found that the highest engine brake torque was developed using E85, but at the same time, fuel consumption increased. E85 yielded the best energy efficiency for a lean mixture (λ = 1.1). A small amount of HHO gas (~ 0.95% energy) yielded a small positive effect only on using E10 fuel at λ = 1.1.
Źródło:
Transport Problems; 2021, 16, 3; 41--51
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Success factors in managing remote work: a global perspective
Autorzy:
Manko, Barbara A.
Rosiński, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/2032985.pdf
Data publikacji:
2021
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
remote work
managing remote work
managing online
work-from-home
online productivity
online morale
management
pandemic management
praca zdalna
zarządzanie pracą zdalną
zarządzanie online
praca w domu
wydajność online
morale online
zarządzanie
zarządzanie pandemią
Opis:
Introduction/background: This paper identifies and analyzes key considerations in managing online, work-from-home business operations. The literature review summarizes research done both previous to and during Covid-19 shutdowns. An original, international survey, conducted in August 2020, polled managers and professional leaders in multiple industries. Aim of the paper: The best use of our survey is to learn about characteristics of remote work, and possible success factors in managing it, which tend to prevail across industry sectors and geographies. Further, our review of the literature is offered as a concise and practical summary of previous research. Altogether, we hope this paper will serve as a step toward building a wide-ranging, well-rounded body of knowledge on the management of remote work, which will be useful to practitioners and scholars alike. Materials and methods: In August 2020 the authors conducted an international, cross-sector survey that drew responses from 158 individuals. The LimeSurvey consisted of 26 questions exploring organizational responses to the pandemic and how people had been managing the transition to remote work. Along with the structured questions - which typically asked respondents to check one answer from a list of possible replies - there were spaces for open-ended comments. Results and conclusions: Analysis and commentary on survey results has largely been done in the sections above. We would conclude, first, by repeating and summarizing a few key points. Providing technologies and tech support for remote work is necessary, but giving remote workers access to the information they need, when they need it, is mission-critical and may be more of a challenge.
Źródło:
Organizacja i Zarządzanie : kwartalnik naukowy; 2021, 1; 41-56
1899-6116
Pojawia się w:
Organizacja i Zarządzanie : kwartalnik naukowy
Dostawca treści:
Biblioteka Nauki
Artykuł
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