Wyniki wyszukiwania - Biblioteka Nauki

1

Measurements of flutter derivatives of a bridge deck sectional model

100%

Gunawan L. , Hafizh H. , Muhammad H.

Journal of KONES

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2013

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tom Vol. 20, No. 4

107--116

EN

Aeroelastic phenomena should be considered during the design phase of long span bridges. One of the aeroelastic problems is flutter, the dynamic instability that may cause structural failure at a wind speed called the flutter speed. The prediction of flutter speed of a bridge needs a thorough modelling of bridge stiffness, inertias, and especially its unsteady aerodynamic forces. The potential flow theory is not applicable to calculate unsteady aerodynamics of oscillating bridges due to their non-streamlined complex geometry, and the non-avoidable flow separation. For these reasons, a semi empirical model proposed by Scanlan is used to describe unsteady aerodynamic forces on an oscillating bridge deck. In this model, relation between unsteady aerodynamic forces and motion of the bridge is modelled using parameters known as flutter derivatives. The values of flutter derivatives can be identified from the free vibration responses of an elastic bridge at several wind-speeds. This paper presents wind tunnel tests and flutter derivatives identification of a sectional aeroelastic bridge model. Modified Ibrahim Time Domain method was applied to identify the eigenvalues and eigenvectors of the model at each wind speed, from which the flutter derivatives can be calculated. The results show that the measurement procedure is able produce flutter derivatives, which are in good agreement with those obtained by other researchers.

2

Efekty regulacji w transporcie samochodowym

100%

Merkisz-Guranowska A.

Przegląd Komunikacyjny

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2008

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tom R. 47, nr 11

29-33

PL

Istota i zakres regulacji w transporcie samochodowym ze szczególnym uwzględnieniem regulacji technicznych i operacyjnych. Ich pozytywne i negatywne skutki, oceniane z różnych punktów widzenia. Symptomy "przeregulowania" tej gałęzi transportu w legislacji unijnej. Analiza produktywności samochodowego taboru ciężarowego według jego wieku.

EN

Essence and scope of road transport regulations with the particular reference to technical and operational ones. Their positive and negative results estimated from the different points of view. This transport branch "Overregulation" symptoms in light of the EU legislation. Productivity analysis of the motor goods rolling stock according to its age.

3

System eCall jako przykład wspomagania kierowcy

80%

Strzyżakowski Z. , Kwiecień K.

Logistyka

|

2009

|

tom nr 6

CD-CD

PL

W artykule przedstawiono zastosowanie komputerowego systemu wspomagania w transporcie drogowym eCall. Omówiono zasadę jego działania oraz zaprezentowano wybrane problemy związane z funkcjonowaniem systemu.

EN

This article contains adaptation computer system of aid in road transportation eCall. This paper present principle of work of the eCall system and introduction connected problems with the operability of the system.

4

Ograniczanie emisyjności pojazdów w transporcie drogowym. Pojazdy hybrydowe i elektryczne w Polsce – perspektywy i bariery rozwoju

80%

Krzak J.

Studia BAS

|

2012

|

nr 1(29)

161-184

EN

In this paper the author addresses the issue of road transport in the context of its environmental impact. The article discusses the issue of air pollution from motor vehicle emissions and various methods of tackling this problem. The first section provides an overview of the most important data related to air pollution caused by road transport and the main EU regulations concerning vehicle emission standards. The second section of the article is devoted to barriers that hinder the growth of the hybrid and electric vehicle market. This analysis is carried out on the basis of the vehicle market conditions in Poland.

5

Development strategy in the field of transport of perishable food products based on the SWOT analysis

80%

Gajewska T.

Research in Logistics & Production

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2019

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tom Vol. 9, No. 3

187--198

EN

A rise in international trade has increased the need for the transportation of perishable products from producers to end-users in distant locations. Such transportation requires extensive logistics planning to ensure the integrity of the goods transported. The article aims to identify and highlight key strengths and weaknesses of the company, and to identify opportunities and threats that can contribute to improving the competitiveness and thus the quality of services provided. The scope of the data included domestic and international transport of two product groups: food and agricultural products. Data were obtained from Eurostat and the Polish Central Statistical Office (GUS) for the years 2010–2015. In order to determine the strategy and enterprise that specializes in the transport of food products, a SWOT analysis was used. The SWOT analysis points clearly to the direction of the business’s development towards strong expansion in the market which is demonstrated by the high figures for the strengths and opportunities (9.48). Compared with 2014, 2015 saw a 14.2% increase in the proportion of foods with a parallel drop in the transport of domestic agricultural produce by nearly 5%. The volume of road transport expressed in tonne/kilometre was 14.5% of the total of EU transport which places Poland second amongst the 28 EU states, after Germany and before Spain and France. The paper demonstrates that the most advantageous development strategy for a domestic transport provider is anaggressive (maxi–maxi) strategy to fully benefit from the opportunities with the use of its strengths.

6

Past, present and future development of West African railways

80%

Bouraima M. B. , Qiu Y.

Journal of Sustainable Development of Transport and Logistics

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2020

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tom Vol. 5, No. 1

103--114

EN

In view of the crucial role, railways have played historically inland transportation, the West African region still endure to provide an efficient transport system. While road transport has been almost the exclusive predominant transportation mode in the region, the railway is now showing a global comeback. In the absence of a new phase of modernization at the international standard, it is unavoidable that the high demand for mobility of its increasing population and the full exploitation of its natural resource endowment will be constrained. This study presents the past, present, and future developments of the railway sector. The first section includes the brief historical development of the railways, the determinants choices of their location, and the influential parameters for their construction. The second section deals with the present state of the railway infrastructure, operational performance, and railway sector institutions. The last section provides some recent investment in the key construction projects at a national level.

7

Analiza prawnych regulacji działalności gospodarczej w zakresie krajowego transportu drogowego

80%

Pieniak A. , Niewczas A. , Dmowski A.

Autobusy : technika, eksploatacja, systemy transportowe

|

2010

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tom R. 11, nr 6

PL

W artykule zaprezentowano aktualny stan prawny regulujący zasady podejmowania i wykonywania transportu drogowego osób i rzeczy na terytorium Rzeczypospolitej Polskiej. Przedstawiono wymagania jakie muszą spełniać przewoźnicy oraz pośrednicy, aby wykonywać działalność gospodarczą w zakresie transportu drogowego. Ponadto przedstawiono analizę wybranej formy reglamentacji krajowego transportu drogowego. Szczegółowo opisano postanowienia ustawy z dnia 6 września 2001 roku o transporcie drogowym, a w szczególności przepisy określające zakres i warunki udzielania licencji na krajowy transport drogowy. Następnie przedstawiono regulacje prawne dotyczące odmowy udzielenia, zmiany lub cofnięcia licencji w zakresie transportu drogowego, oraz opłat za czynności administracyjne związane z wykonywaniem transportu drogowego.

8

Boosted HCCI operation on multi cylinder V6 engine

80%

Misztal J. , Wyszyński M. , Xu H. , Tsolakis A. , Qiao J. , Wyszyński M. , Xu H. , Tsolakis A. , Qiao J. , Wilson T.

Journal of KONES

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2006

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tom Vol. 13, No. 2

315-321

EN

This paper is an extension of work done with boosted 1-cyl Homogenous Charge Compression Ignition (HCCI) engine. As has been proven in the authors’ laboratory on a single cylinder research engine, applying boosting can enable an increased load range with a decreased NOx emission. During the tests which are covered in this paper, a Jaguar V6 research engine with a negative valve overlap facility has been used. The engine is equipped with a mechanically coupled supercharger, which supplies the required amount of air. The introduction of a higher amount of air allows the cylinder mixture to be kept on a highly diluted level; this enables autoignition to be controlled and improves NOx emission. Finally, more air introduced into the cylinder enables more fuel to be injected, which in turn provides for a higher load. This fact is useful as one method to increase the upper load limit for HCCI. Boosted HCCI operation is very sensitive to exhaust gas residuals. It has been proven that valve operation, whether advancing or retarding away from the optimum point will affect NOx emission. Th6is paper will demonstrate that the optimisation of valve timing in connection with lambda value and boost pressure can produce lower NOx emission for the same or even a higher load.

9

Weryfikacja zastosowania otwartego środowiska programistycznego na wybranym zadaniu transportowym

80%

Łukasik Z. , Górska M.

Autobusy : technika, eksploatacja, systemy transportowe

|

2019

|

tom R. 20, nr 6

202--205

PL

Celem badawczym omówionym w artykule była weryfikacja - jakie środowisko programowania jest bardziej użyteczne w wybranym zadaniu transportowym. I stąd - chcąc ukazać trajektorie przemieszczających pojazdów na zadanych sieciach dróg, wybrano m.in. otwarte środowisko programistyczne, w odróżnieniu do uprzednio stosowanego – w badaniu podobnego zagadnienia – środowiska o odmiennej licencji. Realizacja postawionego zadania nastąpiła poprzez konsekwentne stosowanie paradygmatu programowania obiektowego.

EN

The article presents results of a study of possibilities to improve the implementation of a road vehicle tracking system previously developed at WTiE UTH Rad. Consequent application of the object-oriented programming paradigm is a key requirement of the task. An intermediate aim of the research is the assessment of available programming environments in the context of scientific problems in the field of transport.

10

Measurement of fuel consumption of a road motor vehicle by outdoor driving testing

80%

Šarkan B. , Holeša L. , Caban J.

Advances in Science and Technology. Research Journal

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2013

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tom Vol. 7, nr 19

70--74

EN

This paper presents the chosen significant parameters affecting vehicle fuel consumption during the vehicle operation. The conducted measurement results define important practical operational functions in the actual operation of the vehicle, which allows for further processing of the input data in order to measure fuel consumption in laboratory tests. The proposal of the methodology for measuring the fuel consumption based on actual operation conditions in the city of Žilina and its surroundings was shown.

11

Taxonomic and Econometric Analysis of Road Transport Development in Poland – The Voivodship Approach

80%

Czech A. , Lewczuk J.

Ekonomia i Zarzadzanie

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2016

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tom 8

|

nr 3

79-88

EN

Transport is considered one of the basic aspects of the movement of people, raw materials as well as goods from the place of origin to the destination. Moreover, in the wider sense, transport includes economic bodies that aim to achieve goals similar to those of businesses that produce a wide range of goods required by customers. Hence, the efficient operations of basic branches of the transportation system determine the entire national economy. Furthermore, transport is considered a basic factor of development, both on the macro- and microeconomic scales. The aim of the paper is to attempt the assessment of the road transport in Poland as an important element of macro logistics. Furthermore, one of the aims of the investigation was the explanation of its influence on the level of economic development in Poland. As the source of information, the research used the data drawn from the Central Statistical Office of Poland. The main methods implemented in this study were both classic and order synthetic measure construction. Further, these measures were used in econometric models as well as for the prediction of their values. The main result of the analysis indicates that the development level of the widely considered infrastructure is strictly correlated with the socio-economic development of particular voivodships. The study on the level of road transport development can lead to a better understanding of the socio-economic development of particular areas of Poland as well as the more efficient use of the support funds.

12

Transformacja własnościowa przedsiębiorstw PKS po roku 1990

80%

Taylor Z. , Ciechański A.

Przegląd Komunikacyjny

|

2008

|

tom R. 47, nr 4

3-13

PL

Radykalna decentralizacja PKS w połowie 1990 r. Prywatyzacja bezpośrednia i pośrednia. Niekorzystny wpływ przemian gospodarczo-ustrojowych na kondycję przedsiębiorstw towarowych i nieco lepsza sytuacja PKS obsługujących ruch pasażerski. Struktura PKS według form własności na początku 2008 r., liczby przedsiębiorstw państwowych, jednoosobowych spółek Skarbu Państwa, spółek pracowniczych, przedsiębiorstw sprzedanych podmiotom zewnętrznym. Konkurencja firm prywatnych.

EN

The sweeping decentralization of PKS enterprise in the middle of 1990. The direct and indirect privatization, unfavourable influence of the economic and political system transformations on the commodity enterprises standing and slightly better PKS enterprises standing, which are serving the passenger traffic. The Structure of PKS according to property forms on the beginning of the 2008, the number of the state enterprises, one-man companies of the Treasury, labour companies, enterprises sold to the external subjects. The competition of the private companies.

13

Decreasing of road transport externalities in the Slovak Republic

80%

Kalašová A. , Černický L.

Zeszyty Naukowe. Problemy Transportu i Logistyki / Uniwersytet Szczeciński

|

2013

|

tom Nr 21

105--116

EN

With increasing traffic volume and traffic capacity the accompanying negative characters are still more proved and the problems have been associated with the establishment and functioning of the transport system. The mentioned problems are mainly: –– negative impact on the environment, –– increasing number of traffic accidents, threats to human health and life, –– traffic congestion, breakdowns and other negative impacts. Road safety is a serious problem of road transport development. Although, the accident rate in Slovakia generally decreases in recent years, its consequences are enormous and it is difficult to quantify it. Traffic accidents cannot be completely eliminated, but it is possible to reduce the number and severity of accidents with the cooperation of various research institutes, international organizations and experts from different fields of science with ministries of transport. Wide variety of ITS applications is a real opportunity for development of movement in the future. Today’s intelligent transport systems products and services in EU are based on telecommunication, electronic, and information technology. A wide range of new applications represents a real revolution in transport. In our paper we would like to analyse road traffic accident rate in the Slovak Republic as one of the main externalities, and the possibilities of decreasing them with the assistance of telematics applications.

14

Transportation of drinking water in frame of inhabitants supply by road transport

80%

Tomek M. , Seidl M.

Logistics and Transport

|

2007

|

tom 5

115-122

EN

This article focuses on planning and realizing of supply by drinking water in case of emergency supply of inhabitants. It also deals with some specific technical means which can be used for transport of drinking water as well as for supply inhabitants in specific conditions of emergency situation.

15

Doprava pitnej vody pri núdzovom zásobovaní obyvatelstva prostriedkami cestnej dopravy

80%

Tomek M. , Seidl M.

Zeszyty Naukowe. Logistyka i Transport / Międzynarodowa Wyższa Szkoła Logistyki i Transportu we Wrocławiu

|

2007

|

tom Vol. 5, No. 2

115-121

EN

This article focuses on planning and realizing of supply by drinking water in case of emergency supply of inhabitants. It also deals with some specific technical means which can be used for transport of drinking water as well as for supply inhabitants in specific conditions of emergency situation.

16

Koszty przedsiębiorstw ciężarowego transportu samochodowego w 2007 r.

80%

Menes E. , Waśkiewicz J. , Wojciechowski A.

Przegląd Komunikacyjny

|

2008

|

tom R. 47, nr 11

24-28

PL

Wyniki badania średnich kosztów l wozokilometra przebiegu w przewozach krajowych i międzynarodowych wykonywanych przez polskie przedsiębiorstwa ciężarowego transportu samochodowego. Koszty jednostkowe według wielkości przedsiębiorstw. Struktura kosztów jednostkowych. Zmiany średnich kosztów jednostkowych w latach 2005 - 2007 w świetle badań ITS.

EN

Research results of average costs of l vehicle kilometer course in domestic and international transportation carried out by the Polish lorry truck transport companies. Unit costs according to companies' magnitude. Structure of unit costs. Changes of unit average costs according to the Motor Transport Institute researches between 2005 and 2007.

17

Przemiany w transporcie drogowym i ich oddziaływanie na rynek usług przewozowych.

80%

Fajczak-Kowalska A.

Pieniądze i Więź

|

2014

|

tom 17

|

nr 1(62)

178-185

PL

Artykuł opisuje problemy związane z transportem drogowym jako jednym z najbardziej elastycznych sposobów transportu oraz prezentuje zakres zmian, które miały miejsce w minionych latach. Po zwiększeniu liczby pojazdów w 1930 roku II wojna światowa zatrzymała rozwój tego sektora. Jego odbudowę rozpoczęto w 1945 roku, gdy poczyniono inwestycje w fabryki samochodów. Na przełomie lat osiemdziesiątych i dziewięćdziesiątych nastąpiły liczne zmiany w tej dziedzinie, będące odzwierciedleniem przede wszystkim dynamicznego rozwoju usług transportu prywatnego. Przystąpienie Polski do Unii Europejskiej stanowiło ożywczy impuls dla dalszego rozwoju transportu drogowego, jednak obecnie stan istniejącej infrastruktury nie pozwala na całościowy rozwój potencjału tego rodzaju transportu.

EN

The article describes issues related to road transport as the one of the most flexible modes of transport, and especially the changes that have taken place over the years. After an increase in the number of vehicles in the 1930s’, World War II stopped the development of this sector. Its reconstruction began in 1945, when investments in the cars’ factories were made. At the turn of the 1980s’ and 90s’ there have been numerous changes in this sphere, reflecting mainly the dynamic development of private transport services. Poland’s accession to the European Union were invigorating boost in further expansion of road transport, however, the current infrastructure does not allow the full development of the potential of this type of transport.

18

Popytowe uwarunkowania przebiegu trasy Via Baltica w Polsce

80%

Komornicki T. , Śleszyński P.

Przegląd Komunikacyjny

|

2007

|

tom R. 46, nr 2

3-9

PL

Znaczenie polskiego odcinka trasy drogowej Via Baltica i kontrowersje wokół jej przebiegu. Uwarunkowania przebiegu za mało eksponowane lub pominięte w opracowaniu firmy Scot Wilson. Koncepcje rozwoju regionalnego a sieć transportowa i źródła popytu na transport. Porównanie trzech wariantów przebiegu Via Baltica m.in. pod względem liczby mieszkańców i przedsiębiorstw generujących popyt na przewozy drogowe (krajowe i międzynarodowe) tą trasą.

EN

The significance of the Polish highway location segment Via Baltica and the controversies around its course' he conditionings of the course not enough exposed or overlooked in the elaboration of the Scot Wilson's company. The conceptions of the regional development in the face of the transportation network and demand sources on the transport. The comparison of 3 alternatives of the course via Blanca inter alia with respect to the number of inhabitants as well as to the number of the enterprises generating the demand on the road transports (domestic and international ones) through this route.

19

Kabotaż w transporcie drogowym

80%

Bentkowska-Senator K. , Kordel Z.

Przegląd Komunikacyjny

|

2009

|

tom R. 48, nr 7/8

45-53

PL

Analiza spodziewanych skutków przyjęcia tzw. pakietu drogowego UE dla polskiego rynku drogowego. Przewozy i praca przewozowa transportu drogowego ogółem oraz transportu międzynarodowego i kabotażu w UE w latach 2004-2007. Zróżnicowane podejście państw członkowskich do problemu kabotażu. Ograniczona liberalizacja przepisów o kabotażu w projektach nowych aktów prawnych UE.

EN

Analysis of the expected results of the introduction of the so called road package of the European Union for the Polish road market. The transport services and the transport work in road transport all together as well as of the international transport and cabotage in the European Union in years 2004-2007. Diversification in approach of the Member States to the problem of cabotage. The limited liberalization of the cabotage related regulations in the new legal acts drafts of the European Union.

20

Theory and practice of inventory pollutant emission from civilization-related sources: share of the emission harmful to health from road transport

80%

Chłopek Z. , Dębski B. , Szczepański K.

Archiwum Motoryzacji

|

2018

|

tom Vol. 79, nr 1

5--22

EN

The article presents authors’ generalization of the methods used for the inventory of pollutant emission from civilization-related sources. The study has been illustrated with results of an evaluation of the share of road transport in pollutant emission from civilization-related sources in Poland in 2015 with respect to the contribution of road transport to total pollutant emission. Official results of an inventory of the emission of substances harmful to health of living organisms, carried out by the National Centre for Emissions Management (KOBiZE) at the Institute of Environmental Protection – National Research Institute, have been presented. The said results are reported in the European Union. They pertain to the civilization-related sources classified as in SNAP (Selected Nomenclature for sources of Air Pollution). It has been found that among the most important environmental hazards related to the emission of substances harmful to health from civilization-related sources, road transport is chiefly accountable for nitrogen oxides emission; however, the national annual emission of nitrogen oxides in Poland has been decreasing from as long ago as 2007, in spite of a significant growth in the number and intensity of use of motor vehicles. The contribution of motorization to the air pollution with particulate matter is relatively small. Definitely, dusts are predominantly emitted by the power industry, especially the dispersed emission sources. Road transport has been found to emit particularly small quantities of one of the most harmful air pollutants, i.e. sulphur oxides. This has been achieved thanks to widespread introduction of low-sulphur fuels. Thanks to the introduction of unleaded fuels to general use, only trace influence of road transport on lead emission has been recorded.

PL

W artykule przedstawiono autorskie uogólnienie metodyki stosowanej w inwentaryzacji emisji zanieczyszczeń ze źródeł cywilizacyjnych. Rozważania zilustrowano wynikami oceny transportu drogowego w emisji zanieczyszczeń ze źródeł cywilizacyjnych w Polsce w 2015 r. ze względu na udział transportu drogowego w całkowitej emisji zanieczyszczeń. Przedstawiono oficjalne wyniki inwentaryzacji emisji substancji szkodliwych dla zdrowia organizmów żywych, wykonanej w Krajowym Ośrodku Bilansowania i Zarządzania Emisjami Instytutu Ochrony Środowiska – Państwowego Instytutu Badawczego. Wyniki te są raportowane w Unii Europejskiej. Wyniki emisji zanieczyszczeń dotyczą źródeł działalności cywilizacyjnej zgodnie z klasyfikacją SNAP (Selected Nomenclature for sources of Air Pollution). Stwierdzono, że spośród najważniejszych zagrożeń środowiska w związku z emisją ze źródeł cywilizacyjnych substancji szkodliwych dla zdrowia transport drogowy jest przede wszystkim odpowiedzialny za emisję tlenków azotu, jednak krajowa emisja roczna tlenków azotu w Polsce już od 2007 r. zmniejsza się, mimo znacznego przyrostu liczby samochodów oraz intensyfikacji ich użytkowania Stosunkowo mały jest wkład motoryzacji w zanieczyszczenie powietrza cząstkami stałymi. Decydującym źródłem emisji pyłów jest energetyka, szczególnie rozproszone źródła emisji. Szczególnie mała jest emisja z transportu drogowego jednego z najpoważniejszych zanieczyszczeń powietrza – tlenków siarki. Osiągnięto to dzięki powszechnemu wprowadzeniu niskosiarkowych paliw. Śladowy jest również wpływ transportu drogowego na emisję ołowiu – dzięki wprowadzeniu do eksploatacji paliw bezołowiowych.