Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 30 for “"Rail transportation"”.
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Profit Based Simulation Model for The Rail Transportation Industry
<p>Schedules often conflict in the rail transportation industry. Operations managers assign resources and make scheduling decisions with no visibility of the revenue, cost, and profitability characteristics of the route they are manipulating. Transit speed decisions focus on ensuring trains safely …
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Predictive Maintenance in Rail Transportation: An Explainable Machine Learning Approach
Railway systems are integral to sustainable urban mobility, yet their reliability depends on effective maintenance strategies that prevent costly disruptions and safety hazards. Traditional fixed-interval maintenance approaches, although widely adopted, are inefficient and fail to capitalise on the …
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Estimation of run times in a freight rail transportation network
… as justifying further exploration by the railroad to ultimately enable more accurate train schedules with subsequent improvements in railroad capacity, customer service, and asset utilization.
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Characterising the Mechanical Loads Acting on Nuclear Packages during Rail Transportation
The safe transportation of new and spent nuclear fuel is an essential part of the nuclear fuel cycle. The aim of this thesis was to obtain a more thorough understanding of the mechanical loading acting on heavy nuclear packages during rail transportation. There were two motivating factors for this …
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An Analysis of the Demand for Rail Transportation of Corn, Soybeans, and Wheat in South Dakota
… cropping patterns, grain marketing flows, and transportation needs have changed in South Dakota as increased ethanol production has led to a significant increase in corn production and the production of distiller’s dried grains with solubles (DDGS) as a co-product. Previous studies have not …
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The impact of light rail transportation announcement and construction : the role of rail transit in property values, land use, demographics, equity, accessibility, and gentrification
… cities continue to expand and their existing transportation infrastructure becomes strained from increased demand, many cities have turned to light rail transit to not only alleviate congestion but also to provide an economic development stimulus to the areas around the stations. This report …
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Railroad Transportation of Dangerous Goods in Canada: Data-Driven Risk Analysis and Implications for Emergency Management
… to examine key risk factors associated with the railroad transportation of hazardous materials (hazmat) and to develop a data-driven risk analysis methodology using rail incident records from 1999 to 2023 across Canada from multiple resources and creating a risk management framework in case of …
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The Economic Effects of Demand-Sensitive Railroad Rates Upon The Storage and Transportation System for U. S. Feed Grains
The demand for rail transportation services of bulk agricultural products is characterized by seasonal peaks. However, railroad rates seldom fluctuate with demand due to alleged regulatory restrictions. Consequently, a disequilibrium of rail services demanded and supplied may arise.
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Montgomery County and economic growth, 1776-1860
… markets. This mountain barrier restricted the transportation of crops and therefore limited farm products to subsistence crops and easily transported livestock. Only after the construction of the Allegheny Turnpike in 1809, and the Roanoke Canal in 1815, which together provided outlets to …
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Hazardous Materials Transportation Flow Survey: An Evaluation of Hazardous Materials Transported in Washington County.
<p>This study examines the transportation of hazardous materials through Washington County, Tennessee. This study incorporates federal, state, and local data in assessing current transportation trends. Data gathering activities included local chemical inventories, hazardous materials transportation …
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Taipei terminal rail station : casting an urban gateway
Access is a key issue in the design of railway stations. The evolution of the train station typology, has resulted in many types of stations based on the development of the stations' access. Since rail travel on a larger scale is a system of access between cities, it is important to look at the …
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The impact of fuel price volatility on transportation mode choice
… various scenarios. Specifically, we analyze the transportation mode choice decision between truckload and intermodal (truck combined with rail) transportation using a model to calculate the total relevant cost, consisting of transportation cost and inventory holding cost. We use input from the …
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The energy futures of long-distance passenger rail in the United States
… potential futures for long-distance intercity rail transportation in the United States in the context of possible energy resource constraints. Three epistemically-distinctive analytical frameworks are used in order to provide a more rigorous and synthetic perspective than would be possible with …
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Estimating train passenger load from automated data systems : application to London Underground
… while travelling in a high frequency urban rail transportation system. If this proves possible, the resulting information will inform capital and operations planning decisions as well as improve the ability to measure the aspects of passenger experience related to travel time and crowding. …
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The Manufacturing and Ballistic Testing of Tri-axial Quasi Three Dimensional Woven Composites Layered in Polyurea
… ammonia are very dangerous hazardous materials. Rail transportation of TIH creates risk that exposes highly populated areas across the country to this threat. This study investigates the ballistic resistance and self-sealing nature of a quasi 3D tri-axial woven composite layered with polyurea …
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Development and assessment of integrated powering systems with alternative fuel choices for clean transportation
… systems using alternative fuels for aviation, rail, and marine transportation as follows: (i) alternative powering systems, such as fuel cells, on-board hydrogen production (ii) alternative fuel choices with hydrogen, methane, methanol, ethanol, and dimethyl ether; and (iii) different methods …
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Air pollution and early deaths in the United States : attribution of PM₂.₅ exposure to emissions species, time, location and sector
… commercial and residential activities, road transportation, marine transportation and rail transportation. In the present work we go beyond aggregate sectors and now attribute exposure and early deaths to sectors, emissions species, time of emission, and location of emission. This enables …
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Adjoint sensitivity analysis of the atmospheric impacts of combustion emissions
… aviation, as well as road, marine, and rail transportation. This thesis presents the state-level fine particulate matter (PM₂.₅) early death impacts of combustion emissions in the US for 2005, 2011 and 2018 (forecast), and how these are driven by sector, chemical species, and location of …
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Control Hierarchies for Critical Infrastructures in Smart Grid Using Reinforcement Learning and Metaheuristic Optimization
… distributed energy resources (DERs), and 2) DC-rail transportation systems in congested urban areas. The rising integration of DERs into the power grid is causing a paradigm shift in the power distribution network. Consequently, new control challenges for efficient and robust operation of the …
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