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 74 for “"trailers"”.
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Soluciones de transporte, trailers y remolques
Al analizar la problemática y las falencias que poseen las empresas se abre paso a una oportunidad de negocio; es por esto que se plantea el proyecto denominado Remolques El Canguro para desarrollar y promover el uso de remolques pequeños que mejoren la eficiencia, la efectividad, la productividad …
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Hedonic price indices for military vehicles and trailers
… estimated for combat vehicles, and trucks and trailers. The period covered is 1981 through 1985. The estimated hedonic price indices show that for trucks and trailers existing historical price indices significantly understate inflation. The estimated hedonic index is 4 to 6 times higher than …
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High-Speed Roll Stability Evaluation of A-Double Tractor-Trailers
… on high-speed roll stability of A-double tractor trailers with 28-ft and 33-ft straight-rail and drop-frame trailers is evaluated through simulation and track testing. The changes in CG position due to the type of trailer (straight-rail vs. drop-frame) and laterally and longitudinally off-centered …
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A Solution for Commodity Field Hauling with Self-Unloading Semi-Trailers
… to hauling many other bulk products. Commodity trailers are used to haul agricultural products from storage facilities to processing plants. These trailers are designed for highway use but are frequently required to work in field conditions as well. In many cases this environment overstresses …
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Design and analysis of an active underbody aerodynamic device for tractor trailers
… up to 30 % of the aerodynamic drag on tractor-trailers, which is the highest drag created by any region on the vehicle. In this study, a novel concept of an active underbody drag reduction device is developed and investigated. The device was evaluated and optimized using computational fluid …
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Video games and violence: a content analysis of print advertisements and internet trailers
… violent content in video game advertisements and trailers. For the purposes of this study, violence was defined as an act intended to cause physical harm (Harris, 2004). Violent content was considered to fall into three different categories: weapons, violent actions, and violent words (Scharrer, …
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Trailers and Mental Health: An Exploration of Psychological Distress Amongst Mobile Home Dwellers
This thesis examines whether residing in a mobile home predicts higher rates of psychological distress. Using combined data from the General Social Survey (1994-2006), I differentiate housing into four distinct categories: mobile homes, conventional homes, apartments, and townhouses. After looking …
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Low-Speed Maneuverability, High-Speed Roll-Stability, and Brake Type Performance of Heavy Truck 33-ft Double Trailers
… and brake type performance of 33-ft double trailers. Little literature exists for 33-ft doubles because they are uncommon on the U.S. roads due to current federal restrictions limiting long-combination vehicles to 28-ft doubles. With the continual rise in e-commerce, however, there is a push …
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Comparison of Modern Controls and Reinforcement Learning for Robust Control of Autonomously Backing Up Tractor-Trailers to Loading Docks
<p>Two controller performances are assessed for generalization in the path following task of autonomously backing up a tractor-trailer. Starting from random locations and orientations, paths are generated to loading docks with arbitrary pose using Dubins Curves. The combination vehicles can be …
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Examination of the Hollywood Movie Trailers Editing Pattern Evolution over Time by Using the Quantitative Approach of Statistical Stylistic Analysis
… editing pattern evolution of 130 Hollywood movie trailers over the past 60 years from 1951 to 2015; the prior studies on the overall evolution of the Hollywood movies’ editing pattern are compared and discussed. The results suggest that although the movie trailers are much shorter than the whole …
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Roll and Yaw Stability Evaluation of Class 8 Trucks with Single and Dual Trailers in Low- and High-speed Driving Conditions
… of roll and yaw stability of tractor/semitrailers with single and dual trailers in city and highway conditions is conducted. Commercial vehicles fundamentally behave differently in city driving conditions than at high speeds during highway driving conditions. In order to closely examine …
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Experimental Evaluation of the Dynamic Performance Benefits of Roll Stability Control Systems on A-train Doubles
… stability of commercial vehicles with double trailers, when subjected to limit-steering maneuvers that can rise during highway driving. A semitruck and two 28-foot trailers are modified for enduring the forces and moments that can result during testing. A load structure is used for placing the …
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Composing with flexible phrases: the impact of a newly designed digital musical instrument upon composing Western popular music for commercials and movie trailers.
… for underscoring western advertising or movie trailers; therefore, the compositions are biased towards western popular music. All of the original works are three minutes long and used western popular instruments. The iterative design process offers insights into the compositional process and …
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Cross media promotion: entertainment industries and the trailer
… witness to a phenomenon: the use of promotion trailers for a variety of products. Both stage theatre and the publishing industries came under the media spotlight for using trailers to promote their wares throwing into sharp contrast the normativity of film trailers. Despite increased academic …
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Extra-light log trailer design
… the structure. Two light-weight, prototype, log trailers were selected to be studied, after an exhaustive survey of the existing designs. Finite element models (FEM) were developed for each of the trailers using three-dimensional tapered unsymmetrical beam elements. Static stress analysis was …
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Experimental Evaluation of Roll Stability Control System Effectiveness for A-double Commercial Trucks
… of commercial trucks with 33-ft A-double trailers are evaluated. The study includes straight-rail trailers with heavy and light loading conditions. Commercial trucks are more susceptible to rollovers than passenger cars because of their higher center of gravity relative to their track …
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Optimal Multi-Temperature delivery frequency for small format stores
… more effective is to use Multi- Temperature Trailers (MTT) that can consolidate demand for products at different temperatures onto a single truck, thereby reducing the number of trips and stops while delivering to small format stores. This thesis explores delivery policy options and the usage …
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Analysis of truck overturn accidents on Virginia interstate systems: a case study of I-81
… section and front driving mechanism, tractor trailers (TR -TR) having two bodies coupled by a hitch, and twin tractor trailers (TW-TR) with front driving mechanisms towed by a double trailer. Vehicle miles of travel (VMT) for these trucks have been steadily increasing for the past five years …
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