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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
31

Maglev high speed ground transportation for the Texas Triangle : a technology assessment

Rojas, Gabriel, active 2007 20 November 2013 (has links)
A maglev rail network connecting the Texas Triangle has the ability to unite this emerging mega-region with a highly efficient alternative to auto and air transport. This would serve to increase the economic sharing of resources and will improve the quality of life for residents with enhanced accessibility to jobs and services in all triangle cities. Many unforeseen benefits materialize from such a highly connected regional transportation infrastructure including cost reductions in highway maintenance and construction and reduced air traffic in congested skies and airports. This study examines the reasons for choosing a maglev system, regulatory barriers to implementing such a system, and the costs associated with a Maglev system built in the Texas Triangle. / text
32

Verslo vadybos tobulinimas geležinkelių sistemos Lietuvoje pavyzdžiu / The management development according to the standard of Lithuanian Railway system

Pakintis, Egidijus 28 August 2009 (has links)
Magistro darbo tyrimo tema – Verslo vadybos tobulinimas geležinkelių sistemos Lietuvoje pavyzdžiu. Baigiamojo darbo teorinėje dalyje išnagrinėta naujosios vadybos teoriniai požiūriai ir organizacijos strateginis valdymas. Aprašyta socialinių sistemų vadybos teorija, empirinė vadybos teorija, strateginio valdymo procesai ir jį veikiančios išorinės aplinkos analizė. Praktinėje baigiamojo darbo dalyje nagrinėjama projekto „Rail Baltica“ plėtros ir įgyvendinimo galimybės Baltijos valstybėse, projekto tobulinimo ir įgyvendinimo problemos, geležinkelių sistemos tobulinimo sąnaudos. Tyrimo metu nustatyta, kaip AB „Lietuvos Geležinkeliai“, Šiaulių filialo darbuotojai supranta Rail Baltica plėtros poreikį ir galimybes, taip pat išsiaiškinta kaip darbuotojai suvokia pasikeitimus įdiegus Rail Baltica projektą. Magistro darbe noriu parodyti koks svarbus Rail Baltica projektas, kokios naudos turės Baltijos valstybės, pasikeitus krovinių ir keleivių pervežimui, kiek bus sutaupoma laiko ir finansinių išteklių, taip pat, kaip AB „Lietuvos Geležinkeliai“, Šiaulių filialo darbuotojai suvokia Rail Baltica svarbą. / The theme for this paper work is the management development according to the standard of Lithuanian Railway system. In the theoretical part of this concluding work the new theoretical viewpoints of the management and strategic administration of the organization was analyzed. The theory of the social systems of the management was described also as empirical theory of the management, the processes of strategical administration and the influence of the external environment to it. In the practical part of this concluding work the developmental project of “Rail Baltica” and its realization possibilities in the Baltic States was analyzed also as the improvement and its implementation problems, Railway system development outlay. While this research took place it was observed how the personnel of “Lietuvos Geležinkeliai” see the need of the development of Rail Baltica, its possibilities as well as how do they comprehend changes that will begin when the project of Rail Baltica will be implemented. In this paper the importance of the Rail Baltica project was shown as well as the benefit that Baltic States will get when transit of goods and passengers will change, the savings will increase in time and finance. This paper work also shows how the employees of “Lietuvos Geležinkeliai” perceive the importance of the Rail Baltica.
33

Modelling and analysis of rail grinding and lubrication strategies for controlling rolling contact fatigue (RCF) and rail wear.

Reddy, Venkatarami January 2004 (has links)
Rails play a significant role in transport of goods and passengers. In Australia railway transport industry contributes 1.6% of GDP with goods and services worth $AUD 8 billion each year which includes $ AUD 0.5 billion per year in exports (Australasian Railway Authority Inc, 2002). Rail track maintenance plays an important role in reliability and safety. The Office for Research and Experiments (ORE) of the Union International des Chemins de Fer (UIC) has noted that maintenance costs vary directly (60-65 per cent) with change in train speed and axle load. It was also found that the increase in these costs with increased speed and axle load was greater when the quality of the track was lower (ORR, 1999). Failures during operation are costly to rail players due to loss of service, property and loss of lives. Maintenance and servicing keep rail tracks in operating, reliable and safe condition. Therefore, technical and economical analysis is needed by rail players to reduce maintenance cost and improve reliability and safety of rail networks. Over the past few years, there have been major advances in terms of increased speed, axle loads, longer trains, along with increased traffic density in corridors. This has led to increased risks in rail operation due to rolling contact fatigue (RCF) and rail wear. The infrastructure providers have less incentive to maintain a given infrastructure standard if its access charges are rigid and rolling stock standard is not achieved. It has been estimated that between 40 to 50 per cent of wagon maintenance costs and 25 per cent of locomotive maintenance costs are related to wheel maintenance (Railway Gazette International, 2003). The economic analysis of Malmbanan indicates that about 50% of the total cost for maintenance and renewal were related to traffic on rails and 50% not related to traffic, such as signaling, electricity and snow-clearance. The results from the analysis have made it possible for the mining company LKAB to start up the 30 Tonnes traffic with new wagons and locomotives on the Malmbanan line in year 2001 (Åhrén et al 2003). The rail infrastructure providers have challenges to maintain infrastructure due to government control on access charges and limited control on rail operations. The aim of the research is to: · Develop a maintenance cost model for optimal rail grinding for various operating conditions; and · Develop integrated rail grinding and lubrication strategies for optimal maintenance decisions. In this research real life data has been collected, new models have been developed and analysed for managerial decisions. Simulation approach is used to look into the impact on various costs such as rail grinding, operating risk, down time, inspection, replacement, and lubrication. The results of the models for costs and the effect of rail grinding and lubrication strategies are provided in this thesis. In this research rail track degradation, rail failures and various factors that influence rail degradation are analysed. An integrated approach for modelling rail track degradation, rail wear, rail grinding and lubrication is developed. Simulation model and cost models for rail grinding are developed and analysed. It has been found through this research that rail grinding at 12 MGT interval is economic decision for enhancing rail life. It was also found that lubrication is most effective compared to stop/start and no lubrication strategies in steep curves. Rail grinding strategies developed in this research have been considered by Swedish National Rail for analysing the effectiveness of their existing policies on grinding intervals. Optimal grinding and lubrication decisions have huge potential for savings in maintenance costs, improving reliability and safety and enhancing rail life.
34

Vysokorychlostní železniční doprava v Evropské unii se zaměřením na systém Thalys / High-speed rail in the European Union and the analysis of Thalys

Jakubec, Martin January 2013 (has links)
The thesis compares high-speed rail with other means of transport for the purpose to identify its main advantages and disadvantages. Furthermore, it determines the scope within which high-speed rail is fully competitive on the transport market. The position of high-speed rail in the European Union is also outlined further in the thesis. These findings are then used to thoroughly analyse the international high-speed system Thalys.
35

Úprava procesu výroby tlakových zásobníků / Modifying the Process of Production of Pressure Containers

Petruška, Jakub January 2016 (has links)
These diploma thesis is focussed on process modyfying of radial outlet drilling of Common Rail System. Introductory part koncern with theoretical system analysis from the point of historical and technical view. It follow elaborate validation plan for assigned problem. Next point is Practically elaborate solution. Final part include evaluation from the point of economical view.
36

A distributed microprocessor system for rail-traffic regulation

Khan, M. E. H. January 1981 (has links)
No description available.
37

A comprehensive electrical analysis of branched rail traction systems

Cai, Yan January 1995 (has links)
No description available.
38

The Great Western Railway and the celebration of Englishness

Bennett, Alan David January 2000 (has links)
No description available.
39

Evaluating mega urban transport project planning implications of West Rail /

Cheng, Pui-kan. January 2008 (has links)
Thesis (M.Sc.)--University of Hong Kong, 2008. / Includes bibliographical references (p. 137-150).
40

An analysis of the transport interchanges for the West Rail

Mak, Chi-fai, Steven. January 2003 (has links)
Thesis (M.A.)--University of Hong Kong, 2003. / Includes bibliographical references (leaves 141-142). Also available in print.

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