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Wyniki wyszukiwania dla: OPERATIONAL DEMANDS
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Cargo ships heat demand - operational experiment
PublikacjaThe paper presents the results of an experiment conducted on two cargo ships – a 5300 TEU container with a steam heating system and a 7500 dwt general cargo ship with a thermal oil system. On both ships research has been carried out using specially designed measuring equipment. After gathering data about flow velocity and temperatures (steam/ cooling water/ thermal oil/ seawater/ outside air), calculations have been done, resulting...
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Determination of operational load parameters of dredge pumps under dredging operations
PublikacjaArtykuł przedstawia propozycję metody określania parametrów rozkłądów eksploatacyjnych obciążeń, jednego z najważniejszych odbiorników energii mechanicznej na pogłębiarkach - pomp pogłębiarskich (gruntowych). Metoda wykorzystująca wyniki własnych badań eksploatacyjnych, odnosi się do dwóch podstawowych stanów eksploatacji pomp pogłębiarskich, a mianowicie do stanu nazywanego załadunkiem ładowni gruntowej (pogłebiarki lub szalandy)...
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Operational problems of large power diesel engines combusting biofuels, considered togetherwith assessment of their operation
PublikacjaWithin this article the issue of large power self ignition engines fed with biofuels has been undertaken. The analysis focused mainly on operation problems. There has been noticed some advantages and difficulties associated with the biofuel application to self ignition engines. The research problem has been characterised and the research purposes have been proposed enabling the most profitable formation of energetic features of...
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On making operational decisions with taking into account value of operation applied to ship main propulsion engine as an example
PublikacjaObiektywizm i racjonalność w podejmowaniu decyzji eksploatacyjnych, są podstawowymi warunkami umożliwiającymi ich optymalny wybór. Zmusza to, do stosowania ocen ilościowych rozpatrywanych kryteriów, a tym samym do poszukiwania takich wskaźników, które w danej sytuacji pozwolą uznać jedną z wielu rozpatrywanych decyzji za najbardziej odpowiednią.Dokładne określenie zadania dla systemu energetycznego (np. zadania transportowego dla...
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EUROPEAN JOURNAL OF OPERATIONAL RESEARCH
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The role of rewards and demands in burnout among surgical nurses
PublikacjaObjective: Job rewards have both, an intrinsic and an extrinsic motivational potential, and lead to employees’ development as well as help them to achieve work goals. Rewards can balance job demands and protect from burnout. Due to changes on the labour market, new studies are needed. The aim of our study was to examine the role of demands and individual rewards (and their absence) in burnout among surgical nurses. Materials and...
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Police stress: The role of professional and organizational demands on burnout
PublikacjaJob demands - resources - empirical study in police officers
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Operational Research
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Knowledge economics and the demand for higher education
PublikacjaThis article suggests that the decreased demand for higher education in Poland is partially caused due to the changes in consumer preferences. The appearance of a cheap and highly accessible form of knowledge offered by the massive open online courses is presumed here to have an effect on the demand for formal higher education. This article proposes an additional perspective to the research on knowledge consumption, especially...
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Evaluation of Professional Demands and Financial Reward Through the Perception of Police Managers
PublikacjaThe aim of the study was to examine the relationship between job demands and salary in the subjective perception of mid-level police managers. An occupational stress model in which effort spent on job demands are not balanced by the received reward, was adopted. The study comprised 51 police officers (4 women). The partial least squares method was used for the analysis, and the SmartPLS 2.0 program was applied. The income and...
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Investigacion Operacional
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Pesquisa Operacional
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Practice implementation of operational level agreement
PublikacjaThe paper concerns practical implementation of the Operational Level Agreement (OLA) compared to the Service Level Agreement (SLA).
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Estimation of vehicle operational fuel consumption
PublikacjaW pracy przedstawiono metodę umożliwiającą wyznaczenie referencyjnego zużycia paliwa dla zarejestrowanych warunków eksploatacji. Warunki eksploatacji opisane są rozkładem energochłonności jednostkowej, która obejmuje zarówno wpływ warunków zewnętrznych jak również styl jazdy kierowcy. W pracy przedstawiono zestawienie wyników uzyskanych dla przejazdów wykonanych na terenie Gdańska, w regularnym ruchu miejskim. Przedstawiono także...
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The demand for skills and labour costs in partner countries
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Is There any Demand for the Workers Aged 50+ in Poland?
PublikacjaThe process of ageing affects all the European Union Member States, including Poland. According to forecasts by the Central Statistical Office, in 2035, the population of Poland will decrease in relation to 2010 by more than 2 million, and the share of people aged 50+ in the total population will increase from 34.8% to 46.6% (Prognoza ludności 2009). In the context of current and projected demographic changes, a discussion is taking...
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Journal of Operational Meteorology
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Journal of Operational Risk
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Journal of Operational Oceanography
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The impacts of final demands changes on the total outputs of Japanese industrial sectors: A further study
PublikacjaThe purpose of the current study is to expand the previous studies which analyze the impacts of final demands changes on the total outputs of industrial sectors of a specific country. More specifically, the study conducts the analysis regarding the impacts on the total outputs of Japanese industries. The study employs a demand-pull Input-Output (IO) quantity model, one of the calculation tools in the IO analysis. The study focuses...
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The work-family interface: Job demands, work engagement and turnover intentions of Polish nurses
PublikacjaA conflict between one's professional life and one's family life may lead to lower well-being both at work and home. Most nurses are women who have traditionally reconciled their professional life with family life. One aim of this study was to examine the relationships between the work-family conflict (WFC),the family-work conflict (FWC), and the perception of job demands (quantitative workload and interpersonal conflicts at work)....
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Job Demands, Engagement, and Turnover Intentions in Polish Nurses: The Role of Work-Family Interface
PublikacjaBackground: Poland has lower ratios of employed registered nurses per 1,000 inhabitants than the EU average. Polish nurses work under miserable conditions without assisting personnel, and they reconcile their professional demands with responsibilities for their families; 96% of them are women. Rationale/Aims: This study uses Hobfoll’s conservation of resources (CORs) theory to explain the role of various resources in the improvement...
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The impacts of final demands changes on the total outputs of Japanese industrial sectors: A further study
PublikacjaThe purpose of the current study is to expand the previous studies which analyze the impacts of final demands changes on the total outputs of industrial sectors of a specific country. More specifically, the study conducts the analysis regarding the impacts on the total outputs of Japanese industries. The study employs a demand-pull Input-Output (IO) quantity model, one of the calculation tools in the IO analysis. The study focuses...
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Programmable CMOS operational transconductance amplifier OTA
PublikacjaW pracy przedstawiono ulepszoną wersję programowalnego wzmacniacza transkonduktacyjnego o szerokim paśmie przepustowym. Zaprojektowany wzmacniacz został przesymulowany komputerowo oraz wyprodukowany w technologii CMOS. Wyniki wskazują na ponad 450 krotną możliwość zmiany współczynnika transkonduktancji oraz 3dB pasmo częstotliwościowe leżące powyżej 300MHz. Przedstawiono również zastosowanie wzmacniacza OTA w analogowej tablicy...
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The structure of demand and its economic consequences for urban transport
PublikacjaThe structure of demand for urban transport services, determined by the share of passengers entitled to free and reduced fares, is an important factor influencing its economic condition. The aim of this article is to present the results of research into the structure of demand for urban transport as well as its economic consequences. The article begins by considering the nature of the determinants and consequences of the public...
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Demand for a Housing Offer Addressed to Senior Citizens in Poland
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CDN for Live and On-Demand Video Services over IP
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EU enlargement and labour demand in the new member states
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EU Enlargement and Labour Demand in the New Member States
PublikacjaResearch to date on labour market responses to EU integration has tended to concentrate on the labour markets of the 'old' EU members. But what effects has the integration of trade had on wages in the new member states? The following article attempts to answer this question using and empirical model of conditional labour demand.
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Toward an understanding of occupational burnout among employees with autism – the Job Demands‑Resources theory perspective
PublikacjaThis article aims to gain insight into the phenomenon of occupational burnout among employees with autism based on the theoretical framework of the Job Demands-Resources theory and the literature on employees with autism in the workplace. Firstly, we argue that although the resources and demands of the neurotypical and neurodivergent employees might be different, the theoretical mechanism of occupational burnout formation remains...
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Research on operational characteristics of tyres with run flat insert
PublikacjaThe paper describes results of research on heavy vehicle tyre with Run Flat VFI insert. The experiment has included the determination of heat generation, rolling resistanceand radial stifnessof two different tyre designes (textile and steel carcass). The results have been used for the purpose of ewalution of tyre operating characteristics. The study included research on non-inflated tyre properties. The purpose of the paper is...
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Determining the operational loads of the hybrid metalworking machines drive
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The identification of operational cycles in the monitoring systems of underground vehicles
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Analysis of changeability of operational loads of main engines on dredgers
PublikacjaArtykuł przedstawia analizę zmienności eksploatacyjnych obciążeń silników głównych i głównych odbiorników energii na trzech podstawowych typach pogłębiarek. Sformułowano zasady przetwarzania wyników pomiarów, jakie powinny być stosowane przy analizie statystycznej eksploatacyjnych obciążeń silników głównych i głównych odbiorników energii na pogłębiarkach
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New transition curve adapted to railway operational requirements
PublikacjaThe paper points to the limited possibilities of improving the existing situation in the area of transition curves used in geometrical layouts of the railway track. Difficulties in the practical implementation and maintenance of very small horizontal ordinates of the transition curve and the ordinates of the gradient due to cant in the initial section, appearing on smooth transition curves, were indicated. The main reason for this...
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Urban Freight Transport Demand Modelling and Data Availability Constraints
PublikacjaThe paper provides a review of urban freight transport demand modelling approaches confronted with constrains regarding adequate data provision from a perspective of the local authorities. Demand estimation models has been selected as a reference because they are the most representative in terms of inclusion of urban freight indicators which can be transformed into a decision-support tool for evaluation of freight measures. The...
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The reduction of auxiliaries power demand: The challenge for electromobility in public transportation
PublikacjaAn important role in the consumption of electric energy in urban transport are non-traction needs (auxiliaries), the main part of which is heating and air condition (HVAC). Auxiliaries are responsible for almost half of total energy consumption (normal weather conditions) and in the winter (or hot summer) it reaches up to 70% in daily scale. The reduction of energy used for non-traction needs is currently the main challenge related...
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Forecasting demand for products in distribution networks using R software
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Proposal of a methodology for the research of clients' demand engaging information technologies
PublikacjaMany researches on the customer's demands who engage the information technology in the business reveal significant mismatch in customer's expectations and technology vendors' offerings.
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The Importance of Demand and Environment for Defining and Establishing the Role of Data Stewards
PublikacjaData stewardship is now a central part of FAIR research data management. Although various types of positions called data stewards have been created at academic institutions over the last years, no demand-oriented, formal model of data stewardship and the associated roles exist so far. This workshop report presents the outcomes of the panel discussion “The Importance of Demand and Environment for Defining Data Stewardship” held...
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Demand determination for electrical energy for trailing suction hopper dredgers
PublikacjaPrzedstawiono metodę określania obciążeń elektrowni w typowych stanach eksploatacji pogłębiarki ssącej nasiębiernej. Przedstawiono sposób określania średniego zapotrzebowania energii elektrycznej i jego odchylenia standardowego. Wykorzystano dane dokumentacji projektowych 10 pogłębiarek ssących nasiębiernych oraz wyniki badań eksploatacyjnych pogłębiarek zawarte w bazie danych DRAGA.
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Multi-Agent Signal Filtering for Electrical Energy Demand Management
PublikacjaConsumers participating in electrical energy Demand Response (DR) programs may be exposed to energy-use related decisions at instants of time which are generally hard to predict. This is especially cumbersome to residential consumers who are less capable of investing in special equipment, or devoting significant time to analyze information and take decisions. To ease residential consumer participation, a multi-agent system proposed...
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OPERATIONS RESEARCH
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SCIENTIFIC PROBLEMS OF MACHINES OPERATION AND MAINTENANCE
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A new quantum-inspired approach to reduce the blocking probability of demands in resource-constrained path computation scenarios
PublikacjaThis article presents a new approach related with end-to-end routing, which, owing to quantum-inspired mecha-nisms of prediction of availability of network resources, results in improved blocking probability of incoming requests to establish transmission paths. The proposed scheme has been analyzed for three network topologies and several scenarios of network load. Obtained results show a significant (even twofold) reduction of...
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Croatian Operational Research Review
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International Transactions in Operational Research
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International Journal of Operational Research
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JOURNAL OF THE OPERATIONAL RESEARCH SOCIETY
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EXPERIMENTAL EVALUATION OF DLC/STEEL SLIDING CONTACTS’ OPERATIONAL ENVELOPE
PublikacjaIn an industrial project concerning sliding bearings, a sliding pair was selected of high alloy steel vs. industrial grade DLC coated high alloy steel as a basis for an innovative design of high performance sliding bearings lubricated with a synthetic oil for use in geared transmission units. The development process required credible data on the ultimate resistance of the sliding pair to very high contact stress. An experimental...