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Wyświetlanie 1-15 z 56
Tytuł:
Inland Waterway Transport in Aggregate and Other Rock Materials Carriage
Autorzy:
Kulczyk, Jan
Powiązania:
https://bibliotekanauki.pl/articles/504421.pdf
Data publikacji:
2013
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
Inland waterway transport
transport structure
aggregate carriage
costs
Opis:
The importance of inland waterway transport for transport in the EU countries is highlighted. In Western Europe inland waterway transport is perceived as an environment-friendly system offering considerable potential. The carriage of aggregates and construction materials has a large share in the transport structure. In the transport on the Rhine aggregates constitute 15-20% of the whole transport on this waterway. In Poland, waterway transport has a marginal importance since its share in the total transport is below 0.5%. In Polish conditions the carriage of aggregates has a significant share in the total inland waterway transport. On domestic routes the share of aggregate carriage amounts to 50-80%. However, the carriage is over short distances and is connected with extraction of aggregates from the bottom of the waterways. The advantages of waterway transport in comparison with rail transport are demonstrated by means of an analysis of the costs of coal transport on the Oder.
Źródło:
Logistics and Transport; 2013, 17, 1; 11-24
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Poprawa jakości projektów budowli transportowych z wykorzystaniem metod zarządzania wiedzą
Improving quality of transport structures projects with methods of knowledge management applied
Autorzy:
Balek, J.
Valuch, M.
Izvolt, L.
Pawlicki, J.
Curaj, M.
Powiązania:
https://bibliotekanauki.pl/articles/197374.pdf
Data publikacji:
2009
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
zarządzanie wiedzą
budowla transportowa
knowledge management
transport structure
Opis:
W artykule przedstawiono problem wpływu zarządzania wiedzą na jakość systemu informacyjnego projektu rozumianego jako zespół działań tworzących nową strukturę, na przykład elementu infrastruktury transportu, dla którego nie ma jeszcze dokładnego odpowiednika.
The article is devoted to influence of the knowledge management on the quality of an information system for projects of any kind. It is based on a premise that the quality of an information system for project contributes to a general performance of the project in a high degree.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2009, 65; 5-11
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technical aspects of decision-making in communication engineering
Techniczne aspekty podejmowania decyzji w inżynierii komunikacyjnej
Autorzy:
Ryczyński, Jacek
Saska, Piotr
Surowiecki, Andrzej
Ksiądzyna, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/30145330.pdf
Data publikacji:
2020
Wydawca:
Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki
Tematy:
transport structure
earth structure
threat
operational safety
budowla komunikacyjna
budowla ziemna
zagrożenie
bezpieczeństwo eksploatacji
Opis:
The subject of the article are problems of safety in the operation of earth structures designed for vehicle traffic in the conditions of threats of loss of stability. In particular, the following issues were discussed: design and construction of embankments on weak, marshy soil, safety of earth structures in floodplains, safety of earth structures in landslide areas, earth structures located in areas of mining damage. Examples of solutions to particular problems are given. The summary contains statements of utilitarian and cognitive significance.
Tematem artykułu są problemy bezpieczeństwa eksploatacji komunikacyjnych budowli ziemnych w warunkach zagrożeń utraty stateczności. W szczególności omówiono następujące zagadnienia dotyczące: projektowania i budowy nasypów na słabym podłożu bagnistym, bezpieczeństwa budowli ziemnych na terenach zalewowych, bezpieczeństwa budowli ziemnych na terenach osuwiskowych, budowli ziemnych zlokalizowanych na terenach szkód górniczych. Podano przykłady rozwiązania poszczególnych problemów. Podsumowanie zawiera stwierdzenia o znaczeniu utylitarnym i poznawczym.
Źródło:
Scientific Journal of the Military University of Land Forces; 2020, 52, 2(196); 449-467
2544-7122
2545-0719
Pojawia się w:
Scientific Journal of the Military University of Land Forces
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efektywność sieci transportowej w Polsce rozbudowywanej ze wsparciem środków UE w latach 2007–2013
Effectiveness Of The Transportation Network In Poland Developed Within The 2007–2013 Eu Infrastructure Development Framework
Autorzy:
Iwaszko-Niziałkowska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/965621.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
transport network,
transport accessibility,
structure of transport system.
sieć transportowa
dostepność transportowa
struktura sieci transportowych
Opis:
W pracy przebadano wzrost efektywności sieci dróg kołowych Polski rozbudowywanej w ramach funduszy unijnych. Wprawdzie inwestycje drogowe podniosły ogólną efektywność całej sieci kraju, ale w trakcie tego procesu spowodowały wzrost zróżnicowania poziomów skomunikowania pomiędzy poszczególnymi obszarami. Wykazano, że mniejsze inwestycje drogowe, subregionalne mogą przynieść w tym względzie większe korzyści.
The paper examines the efficiency of the road transportation network in Poland, developed with the use of EU funds. The examined infrastructure investments increased the overall efficiency of the national transportation network, but in the process, they also increased the differences/inequalities in the level of spatial accessibility of various areas. It has been proved that smaller road infrastructure developments at a subregional level would have led to greater efficiencies in the overall efficiency of the national network.
Źródło:
Acta Universitatis Lodziensis. Folia Geographica Socio-Oeconomica; 2014, 18
1508-1117
2353-4826
Pojawia się w:
Acta Universitatis Lodziensis. Folia Geographica Socio-Oeconomica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Struktury organizacyjne i własnościowe w transporcie kolejowym
Organisational and privately owned structures in the rail transport
Autorzy:
Mężyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/251477.pdf
Data publikacji:
2009
Wydawca:
Instytut Naukowo-Wydawniczy TTS
Tematy:
struktura organizacyjna
struktura własnościowa
transport kolejowy
organisational structure
privately structure
railway transport
Opis:
Zmiana zasad funkcjonowania transportu kolejowego należy do bardziej widocznych zmian na rynku transportowym, jakie miały miejsce w ostatnich dekadach. Proces ten, w Unii Europejskiej trwający od początku lat dziewięćdziesiątych XX w., przebiegał w podobnym czasie w wielu państwach na całym świecie. Główną i wspólną dla większości państw przyczyną podejmowania działań w tym obszarze była ogólnie zła ekonomiczna sytuacja przedsiębiorstw transportu kolejowego, których państwo było właścicielem. Potrzeba rozwiązania tych problemów postawiła ekonomistów i polityków wobec konieczności zaprojektowania procesów restrukturyzacji kolei.
Źródło:
TTS Technika Transportu Szynowego; 2009, 3; 37-40
1232-3829
2543-5728
Pojawia się w:
TTS Technika Transportu Szynowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of cost structure of international road transport operators in West Pomeranian voivodship in the years 2008-2014
Autorzy:
Suproń, Błażej
Powiązania:
https://bibliotekanauki.pl/articles/14472934.pdf
Data publikacji:
2018-06-23
Wydawca:
Wyższa Szkoła Bankowa we Wrocławiu
Tematy:
costs
transport enterprises
cost structure
Opis:
Aim: The analysis of the cost structure and the factors determining these costs constitutes an important subject that is applied for both strategic planning of the company’s activity and the evaluation of the actions taken before. The aim of the study was to analyze the structure of the costs incurred by transport enterprises operating in the territory of West Pomeranian Voivodeship in the period from 2008 to 2014, as well as the factors which determined cost variations. Design / Research methods: Literature research provided an introduction to the discussion along with an analysis of the secondary sources concerned with the subject of the study. Achieving the goals required the analysis of financial reports compiled by the enterprises examined for 2008-2014. The methods of descriptive statistics were used for collecting the data. Considering the fact that the study included more than half of the target group the results obtained can be referred with considerable caution to all other economic operators of this kind in the West Pomeranian Voivodeship. Conclusions / findings: The results found that the costs of the enterprises examined were to the largest extent influenced by macroeconomic factors, such as interest rates, fuel prices, as well as the situation on the job market. Micro-enterprises were the most vulnerable to the changes in these factors. The study showed that there is a significant correlation between the expenses borne and the economic situation on the EU market. Originality / value of the article:  While the majority of the compilations concerning transport enterprises focuses on their general situation, the results of this study provide a thorough analysis of the internal situation of the entities examined and indicate the influence of the individual factors on the market situation of these entities. It is the first compilation focusing on transport enterprises which undertakes the analysis of the costs they incur applying such a broad aspect. Implications of the research (if applicable): The results may be used by individuals who manage transport enterprises in order to track, within the framework of an ex post analysis, the factors influencing the costs, as well as their future optimization. From the scientific perspective, the findings may be applied for further considerations concerning the road transport sector and its market situation. Limitations of the research: The main limitation of the study is the incomplete picture of the situation of all transport enterprises in West Pomeranian Voivodeship. Due to the lack of comparability of the financial data, as well as the difficulties in obtaining them, the study did not include the companies which are not required to publish financial reports and those keeping tax records. Another limitation is the lack of the data on enterprises which  did not submit their reports to the relevant registers despite being obligated to do so. JEL: R41
Źródło:
Central European Review of Economics and Management; 2018, 2, 2; 61-86
2543-9472
Pojawia się w:
Central European Review of Economics and Management
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Finding of the expected income of the closed queueing structure and its application in transport logistics
Autorzy:
Matalytski, M.
Kiturko, O.
Powiązania:
https://bibliotekanauki.pl/articles/122798.pdf
Data publikacji:
2013
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
transport logistics
closed queueing structure
Opis:
Research of the closed exponential queueing structure with one-type messages and the income is conducted. The differential equation in partial derivatives for an income distribution density is received. The ordinary differential equation for its expected income is constructed at particular starting conditions. The offered method of its decision in a case when the intensity of the service of messages, the number of messages in networks, the number of lines of the service in systems, the matrix of probabilities of transitions of messages and the income from transitions between conditions of the closed queueing structure (CQS) depend on time is described. An example when change of parameters has seasonal nature is reviewed. Results of this article can be applied at the prediction of the income of the logistic transport system (LTS).
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2013, 12, 1; 85-92
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The monitoring results of accessibility of the transport environment for people with disabilities living in the city of Rivne
Autorzy:
Nalobina, Olena
Bundza, Oleh
Holotiuk, Mykola
Markova, Olga
Powiązania:
https://bibliotekanauki.pl/articles/263198.pdf
Data publikacji:
2020
Wydawca:
Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:
people with disabilities
public transport
age structure
questionnaire method
transport network
transport environment
Opis:
This work is the result of research carried out by an initiative group in the city of Rivne to assess the accessibility of the transport environment for people with disabilities. The rights of people with disabilities to access transport services were researched by studying the accessibility of vehicles for people with disabilities. The monitoring was carried out by means of questionnaire method, conducted survey, registration (observation) and expert evaluation. The questionnaire was attended by 100 people, among them: disabled people with diseases of the musculoskeletal system (20 people); visually impaired people (28 people); hearing impaired people (22 people); parents of children with cerebral palsy and autism (30 people). The monitoring results are presented in the form of graphs, tables and diagrams. Based on the expert assessment, a summary table of recommended indicators for evaluating the accessibility of transport system elements was obtained. A list of priority measures was proposed to create an accessible urban transport environment. The results of the monitoring are the basis for further investigation of the problem of transportation of people with disabilities.
Źródło:
Archiwum Motoryzacji; 2020, 87, 1; 5-18
1234-754X
2084-476X
Pojawia się w:
Archiwum Motoryzacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Riffle Sequences on Discharge and Sediment Transport in a Mountain Stream
Autorzy:
Korpak, Joanna
Lenar-Matyas, Anna
Łapuszek, Marta
Mączałowski, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/123914.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
mountain stream
riffle
rapid hydraulic structure
sediment transport
Opis:
Natural riffles are formed as a result of fluvial processes in the stream channel, water flow, and sediment movement. In recent years, artificial riffles have also been constructed in order to improve the water flow and sediment transport as well as to initiate the processes that lead to the restoration of natural riffle–pool sequences. In river engineering, the utilization of artificial riffles (rapid hydraulic structures) is still in its experimental stage. Artificial riffles are studied and described in the literature on a case study basis. However, the studies on riffle sequences and their effects on stream channel evolution need to be improved. A system of artificial riffles was created in the mouth section of Krzczonówka Stream in 2013. The new riffles made the stream channel more morphologically diverse and also reduced its longitudinal slope. The check dam on the stream, located upstream of the newly formed riffles, was renovated and lowered in 2014. At this time, a flood occurred and released a large mass of sediment downstream of the check dam. Then, the sediment settled in the sections between the artificial riffles, thus covering some of them. The aim of the study was to examine the effect of the system of riffles on the changes in sediment transport and water flow in the studied stream channel. Calculations indicate that the system of riffles established downstream of the check dam has limited the movement of sediment. The sediment transport is varied throughout the studied stream course and is mostly dependent on the sediment supply.
Źródło:
Journal of Ecological Engineering; 2019, 20, 3; 157-166
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of the Loading of the Carrying Structure of a Tank Wagon During Transportation by a Railway Ferry
Autorzy:
Fomin, O.
Vatulia, G.
Lovska, A.
Gerlici, J.
Kravchenko, K.
Powiązania:
https://bibliotekanauki.pl/articles/1841535.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
railway ferry
carrying structure
rail transport
dynamic loading
Opis:
A study of the dynamic loading of the carrying structure of a tank wagon during transportation on a railway ferry was carried out. The studies were carried out with the angular displacements of the railway ferry around the longitudinal axis (lurch), as the case of the highest load on the carrying structure of the tank wagon. It was found that the acceleration total value that acts on the outermost tank wagon from the bulwark is 0.31g. The resulting value of acceleration, as a component of the dynamic load, was taken into account when calculating the strength of the carrying structure of the tank wagon, taking into account the typical scheme of interaction with chain ties. The research carried out will contribute to the creation of recommendations for the safe operation of tank wagons in international rail and water traffic and increasing the efficiency of rail transport functioning.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 2; 321-328
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on peripheral clamping of large-aperture laser transport mirror
Autorzy:
Cao, Tingfen
Liu, Bowu
Wang, Hui
Ni, Wei
Zhang, Jinli
Chen, Xiaojuan
Li, Yingang
Zhou, Hai
Jiang, Xiaodong
Hu, Dongxia
Zhu, Qihua
Powiązania:
https://bibliotekanauki.pl/articles/27310087.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
transport mirror
peripheral clamping
surface distortion
assembly structure
Opis:
This article introduces the study of peripheral clamping for large-aperture laser mirrors in high power laser facilities. Some multi-point clamping schemes were experimentally tested, the results of the experiments show that these schemes cannot meet the technical requirements, and in the simulation analysis, we explain the reason for this phenomenon. It is concluded that the additional bending moment caused by the non-ideal process factors in the multi-point clamping is the main cause for the surface distortion. Based on the above conclusions, we carried out research on minor-point clamping. Experimental verification of the minor-point clamping were done, the results show that the minor-point clamping can meet the requirements of technical indicators in whole process. This work can provide a reference for the design of the large-aperture transport mirror clamping structure, which may be used in huge laser devices and telescopes.
Źródło:
Optica Applicata; 2023, 53, 2; 227--238
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The method of evaluation of the availability of the transport system for the realization of the assigned transport task
Autorzy:
Woropay, M.
Migawa, K.
Bojar, P.
Powiązania:
https://bibliotekanauki.pl/articles/247624.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport system
technological availability
threshold structure
semi-Markovian model
Opis:
The article presents the method of evaluation of the availability of the utilization subsystem in a transport system. The method includes the defining and comparison of the values of the availability of the utilization subsystem to the value of the required availability. The article also deals with the way of defining the minimum availability of an individual technological object (means of transport) as well as the minimum number of technological objects used in the system, in order for the obtained value of the availability of the utilization subsystem to exceed the value of the required availability determined by the parameters of transport task. The values of the availability of the utilization subsystem are defined according to the availability of an individual technological object, the number of objects used in the system as well as the structure by which the individual technological objects are linked. The availability of the individual technological object was defined on the basis of a constructed mathematical model of the utilization process realized in the tested transport system. Then, for the utilization data obtained during tests conducted in an existing transport system, the values of the analyzed characteristics were defined. The presented results are the effect of research conducted as part o f a larger research project pertaining to the creation o f a decision-making model of controlling the availability of a transport system.
Źródło:
Journal of KONES; 2010, 17, 3; 505-512
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research of the dynamic properties of structures the models of interpretation
Autorzy:
Wiśniowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/243504.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
aviation
vibration
structure testing
resonance analysis
modal analysis
Opis:
Experimental research of the dynamic properties of structures is performed during of prototype perfectioning, current exploitation and even after the withdrawal from the exploitation for the estimation of the residual durabilities. The aim for research of the dynamic properties of structures is the assurance of its safety, reliability, economic management and comfort. Researcher records the amplitudes of vibrations in the function of the actuation frequencies. Local raise of the amplitude is qualified as resonance. From the researcher point of view, the shape of resonance curves justifies the discrimination of two types of phenomena's: „single resonance" and „close frequencies resonance". For better understanding of these occurrences „the models of interpretation" were proposed. Up to three models of interpretation were assigned to the single resonance: one-degree-of-freedom system, one-degree-of-freedom system with share of the backlashes, two one-degree-of-freedom systems with the same frequencies. From above reasoning, the conclusion results that researcher can expect that the preliminary isolated single resonance belongs to one from the three, mentioned above cases. The judgment of these occurrences, just as the disentanglement of relations in the resonance pair with close frequencies, determines next challenge for the researcher.
Źródło:
Journal of KONES; 2008, 15, 3; 561-565
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wybrane zagadnienia projektowe trakcyjnych sieci tramwajowych
Selected design issues of tram traction catenary
Autorzy:
Maciołek, T.
Powiązania:
https://bibliotekanauki.pl/articles/252713.pdf
Data publikacji:
2016
Wydawca:
Instytut Naukowo-Wydawniczy TTS
Tematy:
trakcja tramwajowa
modernizacja
transport kolejowy
struktura sieci
traction tram
modernization
railway transport
network structure
Opis:
W artykule przedstawione zostały zagadnienia związane z modernizacją i budową nowych sieci tramwajowych. Nowe materiały i podzespoły konstrukcyjne pozwalają na poprawę funkcjonowania sieci. Opisane zostały parametry wymiarowe i obciążeniowe podstawowej struktury sieci. Przedstawiono również nowe rozwiązania dotyczące konstrukcji urządzeń naprężających.
The paper presents problems of modernization and construction of new tram overhead catenary. Implementation of modern materials and equipment allows improvements of catenary exploitation. Construction s/ze and load parameters of basie structure ofoverhead catenary are described. New solutions of tensioning eąuipment are as well presented.
Źródło:
TTS Technika Transportu Szynowego; 2016, 10; 30-34
1232-3829
2543-5728
Pojawia się w:
TTS Technika Transportu Szynowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical simulations of air-pollutants in windy atmosphere
Autorzy:
Michalczyk, J. K.
Murawski, K.
Powiązania:
https://bibliotekanauki.pl/articles/1962998.pdf
Data publikacji:
2002
Wydawca:
Politechnika Gdańska
Tematy:
environmental protection engineering
transport of air-pollutants
plume structure
turbulence
Opis:
Spreading of gaseous pollutants in windy atmosphere is considered by means of numerical simulations of two-dimensional hydrodynamic equations. The parametric studies, which are performed for various magnitudes of a horizontal wind speed, reveal a plume development and a generation of vortices which occur as a result of Kelvin-Helmholtz instabilities. Mass density profiles exhibit high level of spatial and temporal variability. A spectral analysis of these profiles provides variable circular frequency and a wave number.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2002, 6, 2; 309-321
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
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