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GTETD 檢索結果共 3958 筆,本頁資料從第 229 筆到第 240 筆

Computer based simulation models have often been used to study the multimodal freight transportation system. But these studies have not been able to dynamically couple the various modes into one model; therefore, they are limited in their ability to inform on dynamic system level interactions. This research thesis is motivated by the need to dynamically couple the multi....

By Franklin Ekoue Gbologah-Civil & Environmental Engineering-GIT-masters-2010-07-08
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We all want to live in a healthy community. Each of us has his or her own image of what such a community should look like. That image is shaped, in part, by our reaction to the communities in which we now live or used to live. However we often take for granted the elements of communities that enable and sometimes disable many of us to remain active in a community for a ....

By Joi Elizabeth Ricks-Architecture-GIT-masters-2010-07-08
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Ni-base superalloys are widely used in hot sections of gas turbine engines due to the high resistance to fatigue and creep at elevated temperatures. Due to the demands for improved performance and efficiency in applications of the superalloys, new and improved higher temperature alloy systems are being developed. Constitutive relations for these materials need to be fo....

By Jin E. Song-Mechanical Engineering-GIT-masters-2010-07-08
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Richtmyer-Meshkov instability (RMI) occurs when an interface of two fluids with different densities is impulsively accelerated. The main interest in RMI is to understand the growth of perturbations, and numerous theoretical models have been developed and validated against experimental/numerical studies. However, most of the studies assume very simple initial conditions.....

By Satoshi Ukai-Aerospace Engineering-GIT-masters-2010-07-08
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As managers of extensive vehicle fleets and transportation infrastructures, public transit agencies present unique opportunities for reducing greenhouse gas (GHG) emissions from the transportation sector. To achieve substantial and cost-effective GHG emissions reductions from their activities, public transit agencies need tools and resources that enable effective GHG em....

By Brent Anthony Weigel-Civil & Environmental Engineering-GIT-masters-2010-07-08
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This thesis examines the marginal cost of congested travel to a variety of businesses by observing time spent in congestion and estimating excess labor costs based upon the relevant value of time. The fleets in the scoping study represented commercial deliveries of goods and services, government agencies, and transit systems. Observations on limited-access expressways w....

By Nicholas Stephen Wood-Civil & Environmental Engineering-GIT-masters-2010-07-08
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This thesis explores one possible method of preventing helicopter crashes caused by brownout using the noise generated by the helicopter rotor as an altimeter. The hypothesis under consideration is that the helicopters height, velocity, and obstacle locations with respect to the helicopter, can be determined by comparing incident and reflected rotor noise signals, provi....

By Joseph Saul Freedman-Mechanical Engineering-GIT-masters-2010-07-08
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This thesis investigated a tip-over stability of mobile boom cranes with swinging payloads. Base and crane motion presents a tip-over problem. Attaching complex payloads further complicates the problem. They study began with a single-pendulum payload to analyze a tip-over stability characteristics under different conditions. A simple tip-over prediction model was develo....

By Daichi Fujioka-Mechanical Engineering-GIT-masters-2010-07-08
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Deliberative democracy has been promoted as a way improving legitimacy and political equality in policy debates. This dissertation seeks to understand how deliberation takes place within the intersection of two unique spaces: dialogue among members of regional civil society groups and communication in online fora. The motivation for this research is based on the notion ....

By Dhanaraj Thakur-Public Policy-GIT-doctoral-2010-07-08
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While site effects are accounted for in most modern U.S. seismic design codes for building structures, there exist no standardized procedures for the computationally efficient integration of nonlinear ground response analyses in broadband ground motion simulations. In turn, the lack of a unified methodology affects the prediction accuracy of site-specific ground motion ....

By Wei Li-Civil & Environmental Engineering-GIT-doctoral-2010-07-08
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In more than two decades of research and practical experiments in interactive digital narrative (IDN), much insight about the relationship of narrative and digital media has been gained and many successful experiments have been undertaken, as a survey of the field illustrates. However, current approaches also limit the scope of experimentation and constrain theory in in....

By Hartmut Koenitz-Literature, Communication, and Culture-GIT-doctoral-2010-07-08
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In order to study suspensions of deformable particles, a hybrid numerical technique was developed that combined a lattice-Boltzmann (LB) fluid solver with a finite element (FE) solid-phase solver. The LB method accurately recovered Navier-Stokes hydrodynamics, while the linear FE method accurately modeled deformation of fluid-filled elastic capsules for moderate levels ....

By Jonathan Ryan Clausen-Mechanical Engineering-GIT-doctoral-2010-07-08
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