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    Wyświetlanie 1-11 z 11
    Tytuł:
    Factors influencing axial compressor stalls
    Autorzy:
    Laskowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/196204.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    stall
    axial compressor
    performance
    stoisko
    sprężarka osiowa
    wydajność
    Opis:
    The article describes the problem regarding stalls in axial compressors, which are widely used in the engines of large and very large transportation aircrafts. The stall phenomenon, unless cleared, poses a major danger to the integrity of a compressor module, which in turn may result in uncontained engine failure and loss of thrust, thereby seriously affecting flight safety. The costs of maintenance to be performed may also be very high, due to irreversible deterioration in some components. A practical assessment of the stall problem and its countermeasures are discussed below.
    Źródło:
    Zeszyty Naukowe. Transport / Politechnika Śląska; 2017, 95; 89-96
    0209-3324
    2450-1549
    Pojawia się w:
    Zeszyty Naukowe. Transport / Politechnika Śląska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The role of organizational culture in the performance of chosen companies
    Autorzy:
    Kiełbasa, Barbara
    Powiązania:
    https://bibliotekanauki.pl/articles/2032991.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    organizational culture
    performance
    management
    ratio analysis
    kultura organizacyjna
    wydajność
    zarządzanie
    analiza wskaźnikowa
    Opis:
    Introduction/background: Organizational culture is a relatively new issue. This concept has started to take on a great importance in modern organizations based on knowledge and innovation. The researchers and managers were faced with the problem of how to introduce values into the organization, how to implement the company's mission and vision, how to “manage” employees' creativity, how to motivate and assign tasks to employees. Another important issue concerns measuring the impact of these soft factors on solid results. Is there a relationship between organizational culture and organizational performance and how to verify it? Aim of the paper: The work deals with the topic of organizational culture in theoretical and practical terms. The aim of the work was to define the influence of organizational culture on the management performance. Materials and methods: The work is based on literature studies, the results of literary studies from empirical research and own research of the author. Index methods were used to assess the condition of enterprises based on publicly available financial statements. The research supplements the opinions of employees of these companies. Results and conclusions: In the surveyed organizations, values, relationships and cooperation are put in the first place. Employees work primarily in teams. The aim of this style of work is to improve internal communication, mutual learning and information exchange, as well as stimulating creativity. Regarding the ratio analysis, the good condition of both organizations should be noted: the financial analysis indicators did not deteriorate. It should be stated that organizational performance is influenced by both the dependent variable and the independent variable. They can be analyzed as soft factors and solid factors. The analysis of the impact of these factors can be done using financial measures. The complementary value is constituted by the relations in the organization and the values which make it possible to more effectively implement the company's strategy, mission and vision of the business.
    Źródło:
    Organizacja i Zarządzanie : kwartalnik naukowy; 2021, 1; 17-27
    1899-6116
    Pojawia się w:
    Organizacja i Zarządzanie : kwartalnik naukowy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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:
    The cascade exchange pressure supercharger of transport diesel with deep cooling cycle air
    Autorzy:
    Krajniuk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/374248.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    cykl pracy
    doładowanie
    głębokie chłodzenie
    wydajność
    charakterystyka obciążenia
    working cycle
    supercharging
    deep cooling
    performance
    load characteristic
    Opis:
    The new principle of the organisation of working process of the combined supercharging system of transport diesel with the Cascade Pressure Exchanger (CPE) has been described. It allows considerably to raise level of forcing of the engine by supercharging at the expense of expansion of effective air supply area and coolings of supercharging air to temperature below an ambient. Substantive postulates of imitating model of work of combined engine(CICE) have been stated. Some results of calculation-experimental investigations of supercharging system of the engine 6×Í12/14 have been given. It confirms the possibility of the essential improvement tractive and fuel-economic factors of the transport installations in broad range of the working conditions.
    Źródło:
    Transport Problems; 2011, 6, 3; 67-76
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    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:
    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:
    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:
    Satisfaction and performance of Generation Z in virtual and face-to-face teams
    Autorzy:
    Maj, Jolanta
    Powiązania:
    https://bibliotekanauki.pl/articles/27313585.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    virtual teams
    generation Z
    virtual work
    satisfaction
    performance
    face-to-face team
    zespoły wirtualne
    pokolenie Z
    praca wirtualna
    zadowolenie
    wydajność
    Opis:
    Purpose: There are several factors that affect the satisfaction and performance of virtual and face-to-face teams. Literature shows however, that there is a research gap as to the influence regarding the analysis of those factors in regards to different generations. The purpose of the paper is the youngest generation – Gen Z functions in virtual and face-to-face teams and how the type of team influences the performance and satisfaction of team members. Design/methodology/approach: Adopting a generational approach, a research design, including an experiment and a survey, was developed in order to analyze if the type of teamwork affects performance and satisfaction of Generation Z representatives. Findings: Findings suggest that the youngest, tech-savvy generation functions easier and more naturally in virtual teams, showing no significant differences in performance in virtual and face 16 to-face teams, and even indicate that working in virtual teams is more satisfying than working in traditional teams. Practical implications: The results of the research can provide a basis for managerial decisions when selecting members of real and virtual teams. Originality/value: The paper contributes to the ongoing scientific debate by presenting the perspective of Generation Z on virtual work, which, to a certain extent, contradicts current beliefs about performance and satisfaction in traditional and virtual teams. It shows that the generational approach should be included in team design in order improve team and organizational competitiveness.
    Źródło:
    Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska; 2022, 160; 363--382
    1641-3466
    Pojawia się w:
    Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
    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:
    The new devices of gas-turbine engines of ground transport on the basis cascade pressure exchanger of krajniuk
    Autorzy:
    Krajniuk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/374815.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    kaskadowa wymiana ciśnienia
    gazo-turbinowe silniki
    cykl pracy
    energooszczędność
    wydajność
    cascade pressure exchange
    gas turbine engines
    working cycle
    power efficiency
    performance
    self-cooling
    Opis:
    Main trends of perfection of gas-turbine engines (GTE) of transport plants by application of principles of the cascade pressure exchange (CPE) for air compression in the working cycle of gas-turbine plant have been analyzed. The principle of action and performances of work of heat compressor CPE realizing compression of working body on the whole at the expense straight convert inputting heat in disposing work of torrent with insignificant distraction mechanics work from shaft selection of power has been described. The results of computational investigation of four variants of the GTE working process organization on the basis of the two-staged compression assembly with intermediate cooling and heating of air-gas medium have been adduced. Application of units CPE in the capacity of compressing stage GTE opens the prospect of adaptations GTE performance by conditions of work in the capacity of forcing units of overland transport.
    Źródło:
    Transport Problems; 2011, 6, 2; 107-119
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal compressor of cascade exchange by pressure
    Termiczny kompresor do kaskadowej wymiany ciśnienia
    Autorzy:
    Krajniuk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/374103.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    kaskadowa wymiana ciśnienia
    kompresor termiczny
    cykl pracy
    temperatura
    energooszczędność
    wydajność
    charakterystyka obciążenia
    cascade pressure exchange
    thermal compressor
    working cycle
    temperature
    power efficiency
    performance
    load characteristic
    Opis:
    A new method of organization of working cycle of device of direct transformation of heat in the located work of compression of air, based on principle of cascade exchange by pressure, is exposed; the results of pre-selection of basic dimensional and structural parameters of thermal compressor of cascade exchange by pressure are adduced; some special features of its working process are considered; main directions of perfection of working cycle of thermal compressors of cascade exchange of pressure are shown.
    Źródło:
    Transport Problems; 2010, 5, 1; 15-22
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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