Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"switcher"”.
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Techno-Economic Analysis of Line Haul and Switcher Locomotive Propulsion by Diesel, Battery, and Hydrogen Fuel Cell Technologies
This thesis examines the critical challenges of reducing greenhouse gas (GHG) emissions within the freight rail industry of the United States transportation sector. The transportation sector, being a significant contributor to the nation’s GHG emissions, requires urgent attention to mitigate …
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Not a proper mathematician, like those with a mathematics degree: ‘Subject switchers’ negotiating identities as beginning teachers of mathematics
… of a term in the literature, the term ‘subject switcher’ is introduced to represent those whose degree is in a discipline that is not directly related to the subject they are training to teach. In the context of this study, a subject switcher is a participant in mathematics initial teacher …
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Torque Controlled Drive for Permanent Magnet Direct Current Brushless Motors
… position. An electronic commutator or phase switcher module interprets the position signals and produces a switching pattern. This effectively transforms the BLDC machine into a direct current (DC) brushed machine. A synchronous step down converter controls the BLDC machine current with a …
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An Efficient Wide-Speed Direct Torque Control Based on Fuzzy Logic Technique
… new fuzzy variables and rescheduling the fuzzy switcher rules. The fuzzy logic control also solved field weakening problem, the speed range can be dramatically increased and the torque ripple when working in field weakening region can be significantly reduced by the proposed technique. We built …
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A demonstration of useful electric energy generation from piezoceramics in a shoe
… step-down transformation), CMOS "555" timing and switcher control, low-side output filtering, load stage on/off control, and output regulation. Finally, it is important to note that, although the proposed conditioning scheme was designed for the transducer developed herein, it could be applied to …
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Measurement of the spin diffusion rate of dipolar order in single crystal calcium fluoride
… the 1mm³ sample in addition to a gradient switcher for switching pulsed currents through the coil. The peak pulsed gradient strengths ranged from 28 to 85 T/m and the spatial wavelengths generated ranged from 1[mu] to 0.5 [mu]/tm.
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Two's More Fun than One: How the Presence of Multiple Nutrients Changes Microbial Competition and Foraging in Unexpected Ways
… resources after one is depleted can allow ‘fast-switcher’ microbes to coexist with competitors that exclude them in single-resource environments. Then, I derive a rich temporal niche structure that arises from variations in the order in which resources are depleted in ecosystems with a pulsed …
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Examining the Connection Between Teacher Practice, Teacher Beliefs About Student Engagement, and the Classroom Environment and the Activation of Achievement Emotions in Middle School Science Students - An Exploratory Case Study
… One teacher was a provisionally licensed career switcher, one was a mid-career teacher who had taught special education before moving to science three years earlier, and the third was an experienced teacher who has taught the same subject in the same school for his entire career. Data collected …
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A study of lexical borrowing and occasional code-switching amongst young middle-class Syrians in Saudi Arabia and Syria
… of schooling, mobility, or attitude, between the switcher participants, it was found that other personal experiences play a role. Personal experience that varies from individual to another according to their unique exposure to English media and other pleasure facilities, can be salient in …
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Summative Evaluation of an Alternative Teacher Licensure Program Sponsored by a Large Suburban School Division
The number of alternative licensure programs has increased significantly over the past decade. Faced with critical shortages of public school teachers in several subject areas, the Commonwealth of Virginia first approved an alternative route to licensure in 1998. In accordance with the No Child …