Browsing by Subject "Collisions"
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Item Creating a culture of safety : Austin, Texas(2012-05) Bennett, Lauren Dayle; McCray, Talia; Dooling, SarahPedestrian and cyclist collisions with motor vehicles are a growing problem in the United States and in particular Austin, Texas. These collisions cause unnecessary loss of life and injury. This research explores strategies in the realms of engineering, education and enforcement from three leading cities for pedestrian and cyclist safety. Based on the analysis, I have identified possible strategies for use in Austin, Texas to prevent these collision types. I also offer a conceptual model that can be used as a framework for organizing and thinking about the various components involved in preventing pedestrian and cyclist collisions with motor vehicles.Item Detecting single-particle insulating collisions in microfluidics as a function of flow rate(2012-12) Nettleton, Elizabeth Grace; Crooks, Richard M. (Richard McConnell); Bard, Allen JThis work presents the first electrochemical observation of single polystyrene microbead collisions with an electrode within a microchannel. We have observed that detecting single microbead collisions is facile with this system. Additionally, we have shown that by increasing flow within the channel, one can increase both the frequency and magnitude of collision signals. This technique may provide a means of signal amplification in future sensing work.Item Fast wave resonances near the ion cyclotron frequency(Texas Tech University, 1976-12) Dollinger, Richard E.The original goal of the research reported here was to use "turbulent heating" to obtain a hotter plasma so that the damping of the fast wave at 2. fi would be enhanced. The advantages and the disadvantages of this plasma source are described in Ch. II along with the experimental arrangement. After much trial and error, the repeatability was finally improved by careful pre-ionization of the plasma.Item From rifting to collision : the evolution of the Taiwan Mountain Belt(2013-05) Lester, William Ryan; McIntosh, Kirk D.; Lavier, Luc LouisArc-continent collisions are believed to be an important mechanism for the growth of continents. Taiwan is one of the modern day examples of this process, and as such, it is an ideal natural laboratories to investigate the uncertain behavior of continental crust during collision. The obliquity of collision between the northern South China Sea (SCS) rifted margin and Luzon arc in the Manila trench subduction zone allows for glimpses into different temporal stages of collision at different spatial locations, from the mature mountain-belt in central-northern Taiwan to the 'pre-collision' rifted margin and subduction zone south of Taiwan. Recently acquired seismic reflection and wide-angle seismic refraction data document the crustal-scale structure of the mountain belt through these different stages. These data reveal a wide rifted margin near Taiwan with half-graben rift basins along the continental shelf and a broad distal margin consisting of highly-extended continental crust modified by post-rift magmatism. Magmatic features in the distal margin include sills in the post-rift sediments, intruded crust, and a high-velocity lower crustal layer that likely represents mafic magmatism. Post-rift magmatism may have been induced by thermal erosion of lithospheric mantle following breakup and the onset of seafloor spreading. Geophysical profiles across the early-stage collision offshore southern Taiwan show evidence the thin crust of the distal margin is subducting at the Manila trench and structurally underplating the growing orogenic wedge ahead of the encroaching continental shelf. Subduction of the distal margin may induce a pre-collision flexural response along the continental shelf as suggested by a recently active major rift fault and a geodynamic model of collision. The weak rift faults may be inverted during the subsequent collision with the continental shelf. These findings support a multi-phase collision model where the early growth of the mountain belt is driven in part by underplating of the accretionary prism by crustal blocks from the distal margin. The wedge is subsequently uplift and deformed during a collision with the continental shelf that involves both thin-skinned and thick-skinned structural styles. This model highlights the importance of rifting styles on mountain-building.Item Measurements of the secondary electron emission from dielectric surfaces(Texas Tech University, 1988-12) Boerwinkle, Elise R.Not available