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VTETD 檢索結果共 19439 筆,本頁資料從第 181 筆到第 192 筆

This thesis explores the use of computer vision to facilitate three dierent processes of a quarry's operation. The rst is the blasting process. This is where operators determine where to drill in order to execute an ecient and safe blast. Having an operator manually determine the drilling angles and positions can lead to inecient and dangerous blasts. By using two camer....

By Gordon A Christie-Electrical and Computer Engineering-VT-masters-2013-06-11
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The state of adhesion of bacteria to nanofiber-textured model surfaces is analyzed at single-cell level. The results reveal similarities between the effect of topography on bacteria-surface interactions and vesicle-surface interactions. The results are discussed in the context of controlling bacterial adhesion to surfaces using nanofibrous topographical features.....

By Mehdi Kargar-Mechanical Engineering-VT-masters-2013-06-05
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In this thesis the close relationship between the topological $K$-homology group of the spacetime manifold $X$ of string theory and D-branes in string theory is examined. An element of the $K$-homology group is given by an equivalence class of $K$-cycles $[M,E,phi]$, where $M$ is a closed spin$^c$ manifold, $E$ is a complex vector bundle over $M$, and $phi: M ightarrow ....

By Bei Jia-Mathematics-VT-masters-2013-06-03
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Due to their compact size, sensitivity, and ability to be multiplexed, intrinsic Fabry-Perot interferometers (IFPIs) are excellent candidates for almost any multi-point temperature or strain application, and it is well-known that using a single-mode lead-in fiber, a multi-mode fiber section as the Fabry-Perot cavity, and an additional single-mode fiber as the tail resul....

By Tyler Shillig-Electrical and Computer Engineering-VT-masters-2013-06-01
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Nowadays, an increasing number of computational systems are equipped with heterogeneous compute resources, i.e., following diï¬erent architecture. This applies to the level of a single chip, a single node and even supercomputers and large-scale clusters. With its impressive price-to-performance ratio as well as power eï¬ciency compared to traditional multicore proce....

By Marwa Khamis Elteir-Computer Science-VT-doctoral-2013-06-01
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With the advent of sequencing technologies, a variety of methods have been available day by day. Each of these methods have helped scientists to for a deeper understanding of the biological function and evolutionary constraints on the relevant genes, which can be gained through the use of modern computational approaches. Numerous approaches have being developed to advan....

By Haktan Suren-Forestry-VT-masters-2013-05-24
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Analogcircuit/IC design for high speed optical fiber communication is a fairly new research area in Dr. Haâs group. In the first project sponsored by ETRI (Electronics and Telecommunication Research Institute) we started to design the building blocks of receiver for next generation 400 Gb/s optical fiber communication. In this thesis research a transceiver architecture....

By Maruf Newaz Ahmed-Electrical and Computer Engineering-VT-masters-2013-05-24
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This study was designed to assess follower prototypes as dynamic structures. Connectionist theory is a good framework to understand the process by which followership perceptions are altered by contextual factors. Organizational culture, change in immediate leader and follower prototypes were measured in an applied setting across time to assess the dynamism of the cognit....

By Kathleen Benton Snead-Psychology-VT-masters-2013-04-22
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The diagnosis of Complicated Grief (CG) is being proposed for inclusion in DSMâ5. As such, it has been the focus of several studies purporting to build evidence of its validity and its conceptual and statistical distinction from Posttraumatic Stress Disorder (PTSD) and depression (Bonanno et al., 2007; Golden & Dalgleish, 2010; Prigerson et al., 1995b). However, previo....

By Scott Robert Anderson-Psychology-VT-doctoral-2013-04-22
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Alumina particles filled Ultra-high Molecular Weight Polyethylene (UHMWPE), with Al2O3 contents 0, 1, and 2.5 wt% were milled for up to 10 hours by the mechanical alloying (MA) process performed at room temperature to produce composite powders. Compression molding was utilized to produce sheets out of the milled powders. A partial phase transformation from orthorhombic....

By Hesham Moh. A. Elmkharram-Materials Science and Engineering-VT-masters-2013-04-02
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In the Spring of 2012, hydraulic data was collected to calibrate three types of discharge models: stage-discharge, single-regression and multi-regression index velocity models. Unsteady flow conditions were observed at the site (âH/ât = 0.75 cm/min), but the data did not indicate hysteresis nor variable backwater effects on the stage-discharge relation. Furthermore, w....

By Mark Richard Rogers-Environmental Engineering-VT-masters-2013-04-01
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The purpose of this study was to find the difference, if any, between the weight gain patterns during pregnancy of women attending public health clinics in Northern Virginia who were enrolled in the NIC program and women not enrolled in the NIC program. Women on the NIC program during pregnancy were identified from NIC files. The control group was chosen from among w....


By Neen Blackwell Alrutz-Human Nutrition and Foods-VT-masters-2013-03-14
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