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VTETD 檢索結果共 19439 筆,本頁資料從第 169 筆到第 180 筆

A finite element procedure is developed for stress-deformation analysis of three-dimensional solid bodies including geometric and material nonlinearities. The formulation also includes the soil-structure interaction effect by using an interface element. A scheme is formulated to allow consistent definitions of stress, stress and strain rates, and constitutive laws. T....


By Hoang Viet Phan-Civil Engineering-VT-doctoral-2013-08-22
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A series of in vitro studies were conducted to evaluate the effect of poly-l-lysine concentration, molecular weight, and encapsulation temperature on the post encapsulation survivability of spermatozoa. Viability of spermatozoa encapsulated at 2012 C using four poly-l-lysine concentrations (.05%, .15%, .25%, and .35%) did not differ over the 8 h incubation period. Ho....


By Stanley Wakefield Fultz-Dairy Science-VT-masters-2013-07-29
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Previous research has shown peer victimization during adolescence to have strong lasting effects on mental health. Religiousness and forgiveness are two factors that are positively related to mental health and the current study proposes that they may have a protective influence against the negative effects of peer victimization. Additionally, religiousness and forgivene....

By Jeanette Marie Walters-Psychology-VT-masters-2013-07-03
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Active research of SMAs has shown that its Seebeck coefficient is sensitive to its martensitic phase transformation and has the potential to determine the SMAs state of transformation. The combination of Shape Memory Alloys, which have a positive Seebeck coefficient, and Constantan which has a negative Seebeck coefficient (-35 mV/K) results in a thermocouple capable of ....

By Vijaya Venkata Narasimha Sriram Malladi-Mechanical Engineering-VT-masters-2013-06-17
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Ego-resiliency (ER) is a trait that describes the ability to cope with stress, while effortful control (EC) is an individual difference related to the ability to optimally inhibit negative emotion through attentional mechanisms. ER has been linked to flexible cardiovascular responding without accounting for autonomic nervous system origins of physiological responses. Si....

By Derek P Spangler-Psychology-VT-masters-2013-06-17
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Parents, especially mothers, of a child with an Autism Spectrum Disorder (ASD) are more likely to experience higher levels of stress, and adaptive emotion regulation strategies, such as mindfulness and acceptance, may decrease stress among parents of children with ASD. Research has shown that mindfulness-based interventions reduce perceived stress among parents of typic....

By Caitlin Mary Conner-Psychology-VT-masters-2013-06-17
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The power grid is interconnected in many ways; so that when disturbances occur in a small region, their effects can be seen across large areas causing major blackouts. In order to isolate the fault, measurements taken at different times throughout the blackout need to be collected and analyzed. With each measurement device having its own time source, time alignment can ....

By Hema A Retty-Electrical and Computer Engineering-VT-masters-2013-06-14
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Synchrony is a multi-faceted construct, defined here as the mutual warmth and responsiveness between a mother and her child. As children with Autism Spectrum Disorders (ASD) struggle to navigate various aspects of social life, we expected that impairments in synchrony would be seen, but that mothers would show adaptability. Twenty-five children (10 met ASD criteria on a....

By Tyler Anne Hassenfeldt-Psychology-VT-masters-2013-06-14
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Decisions made under risk have been primarily studied within economic contexts (Platt & Huettel, 2008). This has led to the development of sound methods and models for studying risky choice behavior (Rangel, Camerer & Montague, 2008). In particular, these models are helpful for estimating how much risk an individual is willing to tolerate. However, there may be a limit ....

By Nina Lauharatanahirun-Psychology-VT-masters-2013-06-14
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This thesis attempts to develop features identification and tracking system for an autonomous ground vehicle by focusing on four fundamental tasks: Motion detection, object tracking, scene recognition, and object detection and recognition. For motion detection, we combined the background subtraction method using the mixture of Gaussian models and the optical flow to hig....

By Chuong Hoang Nguyen-Mechanical Engineering-VT-masters-2013-06-14
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It is well established in developmental science that 14-month-old infants have significant difficulty associating pairs of objects with pairs of words that differ by a single phoneme (i.e., minimal pairs). This study used a traditional switch procedure in two experimental conditions (i.e., no face versus face with shifting gaze) to habituate infants with objects and min....

By Laura Mills-Smith-Psychology-VT-masters-2013-06-13
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With looming energy crisis across the globe, achieving high efficiency and low cost solar cells have long been the key objective for photovoltaic researchers. III-V compound semiconductor based multijunction solar cells have been the dominant choice for space power due to their superior performance compared to any other existing solar cell technologies. In spite of unma....

By Nikhil Jain-Electrical and Computer Engineering-VT-masters-2013-06-11
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