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VTETD 檢索結果共 19439 筆,本頁資料從第 13 筆到第 24 筆

The More-electric aircraft (MEA) concept has been raised since 1990s in order to increase fuel economy and reduce environmental impact of aircrafts. The fundamental of the concept is to replace pneumatic, hydraulic and mechanical systems in conventional aircrafts with its electrical equivalent that is lighter and more reliable. In this movement, power electronics techno....

By Qiong Wang-Electrical and Computer Engineering-VT-masters-2015-07-30
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Role models can serve as a means to counteract the prevalent âThink Leader, Think Maleâ stereotype. This study was designed to assess the impact of role model similarity on womenâs leadership self-efficacy, task performance and future leadership behavior, using two conceptualizations of similarity â match with leadership self-concept and attainability of the role mo....

By Yashna Jitendra Shah-Psychology-VT-masters-2015-07-15
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Leadership emergence is best conceptualized as a complex, multi-level process arising from the dynamic interplay of all elements in the process: group members, relations, and context (Day, 2014). This study seeks to simultaneously examine to the role of each in the leadership emergence process by assessing leader and follower traits, their trait similarity, task, behavi....

By Maureen Elizabeth McCusker-Psychology-VT-masters-2015-07-13
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The LLC resonant converter has been widely used as a DC-DC converter due to its high efficiency, high power density and hold-up capability in power supplies for communication systems, computers and consumer electronics. Use of the high-frequency LLC converter has also been increasing in recent years due to its high power density and integrated magnetics, which reduce th....

By Chao Fei-Electrical and Computer Engineering-VT-masters-2015-07-01
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Mosquitoes drink using a pair of in-line muscular pumps in the head that draw liquid food through a long drinking channel termed as proboscis. Experimental investigations of mosquito drinking using synchrotron x-ray indicate two modes of drinking, a predominantly occurring continuous mode in which the anterior cibarial and posterior pharyngeal pumps expand cyclically at....

By Souvick Chatterjee-Engineering Science and Mechanics-VT-masters-2015-06-30
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This thesis examines the design and implementation of the navigation solution for an autonomous ground vehicle suited with global position system (GPS) receivers, an inertial measurement unit (IMU), and wheel speed sensors (WSS) using the framework of Kalman filtering (KF). To demonstrate the flexibility of the KF several methods are explored and implemented such as con....

By Philip Andrew Jones-Mechanical Engineering-VT-masters-2015-06-25
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From 2012 - 2015 a foundation for future research in Goodwin Hall was designed, tested, developed, and implemented through an instrumentation project supported by the College of Engineering at Virginia Polytechnic Institute and State University. This required the design and implementation of a distributed, networked, and synchronized data acquisition system along with s....

By Joseph Marshall Hamilton-Mechanical Engineering-VT-masters-2015-06-17
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Cocaine use has contributed to 5 million individuals falling into the cycle of addiction. Prior research in cocaine dependence mainly focused on rewards. Losses also play a critical role in cocaine dependence as dependent individuals fail to avoid social, health, and economic losses even when they acknowledge them. However, dependent individuals are extremely adept at e....

By John Mujia Wang-Psychology-VT-masters-2015-06-08
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Terror management theory (TMT) seeks to understand religious worldview adherence, positing that worldview beliefs can abate existential threats such as mortality salience. Most research on TMT has employed young samples, so influences on older adultsâ experiences of mortality salience are unclear. Simultaneously, research on death anxiety shows that older people may vi....

By Aaron Michael Ogletree-Human Development-VT-masters-2015-06-05
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Successful episodic recollection occurs when an event properly binds with its context. Source misattribution demonstrates incorrect binding of a memory with its contextual information. By contrast, false memories are memories of events that did not occur. Although theoretically they should not be bound with contextual information, often, false memories are accompanied b....

By Meagan O'Neill-Psychology-VT-masters-2015-06-05
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The recent trend of migrating legacy computer systems to a virtualized, cloud-based environment has expanded to real-time systems. Unfortunately, modern hypervisors have no mechanism in place to guarantee the real-time performance of applications running on virtual machines. Past solutions to this problem rely on either spatial or temporal resource partitioning, both of....

By Michael Stuart Drescher-Electrical and Computer Engineering-VT-masters-2015-06-04
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The variable nature of photovoltaic (PV) generation can cause voltage fluctuations in power distribution systems. Feedback control can be used to minimize the voltage fluctuations. This thesis presents the results obtained from comparing the control performance of two types of PV generation feedback control, namely Volt-VAR control and constant power factor control. A t....

By Ashish Agrawal-Electrical and Computer Engineering-VT-masters-2015-05-28
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