Zugl.: Kiel, Universiẗat, Diss., 2008.

Bachelor-Arbeit Univ. St. Gallen, 2005.

Thesis (M.S.)--West Virginia University, 2007. / Title from document title page. Document formatted into pages; contains viii, 147 p. : ill. (some col.), maps. Includes abstract. Includes bibliographical references (p. 110-122).

Thesis (Ph. D.)--University of Texas at Austin, 1999. / Vita. Includes bibliographical references (leaves 459-466). Available also in a digital version from Dissertation Abstracts.

abstract: Semiconductor devices are generally analyzed with relatively simple equations or with detailed computer simulations. Most text-books use these simple equations and show device diagrams that are frequently very simplified and occasionally incorrect. For example, the carrier densities near the pinch-off point in MOSFETs and JFETs and the minority carrier density in the base near the reverse-biased base-collector junction are frequently assumed to be zero or near zero. Also the channel thickness at the pinch-off point is often shown to approach zero. None of these assumptions can be correct. The research in thesis addresses these points. I simulated the carrier densities, potentials, electric fields etc. of MOSFETs, BJTs and JFETs at and near the pinch-off regions to determine exactly what happens there. I also simulated the behavior of the quasi-Fermi levels. For MOSFETs, the channel thickness expands slightly before the pinch-off point and then spreads out quickly in a triangular shape and the space-charge region under the channel actually shrinks as the potential increases from source to drain. For BJTs, with collector-base junction reverse biased, most minority carriers diffuse through the base from emitter to collector very fast, but the minority carrier concentration at the collector-base space-charge region is not zero. For JFETs, the boundaries of the space-charge region are difficult to determine, the channel does not disappear after pinch off, the shape of channel is always tapered, and the carrier concentration in the channel decreases progressively. After simulating traditional sized devices, I also simulated typical nano-scaled devices and show that they behave similarly to large devices. These simulation results provide a more complete understanding of device physics and device operation in those regions usually not addressed in semiconductor device physics books. / Dissertation/Thesis / M.S. Electrical Engineering 2011

This thesis describes the measurement of high g-forces, in the range of 400-800g's occurring in a spinal construct during the breaking of the set-screw head using a manual torquing instrument. The measurements were validated using a high speed camera. The design torque (11 N-m) required for breaking the set-screw was compared with the torque calculated from the distortion energy theory for material fracture (9.9 N-m) and an actual measurement using a torque wrench (11.3 N-m). A comparison between the manual and powered instruments showed a 27.68% reduction in g-forces and a 36.42% reduction in die-down time while using the powered instrument. 8.52% less energy was felt on the adjoining screw. The consistency in the powered instrument is higher because the standard deviation using the manual instrument is 8.46, compared to the powered instrument which was 8.31. Also 25g's was recorded on the surgeon's wrist and elbow. Based on previous work done, the external work done by the surgeon was about 60-120 KJ. The onset of fatigue was apparent in consecutive break events as illustrated by the change in EMG parameters over time.

The aim of this study was to determine how the performance of the Egyptian high jumpers is depending on the kinematic parameters of a take-off phase. The sample of the study has been selected from competitors of the high jump event - three jumpers representing the Egyptian international athletic team. The researcher has studied the sample using a direct measurement by a synchronized 3D video system to measure the kinematic parameters. The researcher has found a relation between record level and vertical velocity components with improvement in technique and better fitness levels, thus the Egyptian jumpers can achieve further progress in their results. This raises optimism because Omer Samir (A2) is very young and his current record 2.02m gives hope for future World - Class. Key words High jump, kinematic parameters, take-off phase.

La valorisation de la recherche universitaire, à travers la création d’entreprises de haute technologie, est une nouvelle mission assignée aux universités depuis la promulgation de la loi de 1999, dite Allègre. Pour cela, les incubateurs technologiques, qui sont de nouvelles structures hybrides, sont apparus aux frontières de trois sphères radicalement différentes, que sont les universités, entreprises et les gouvernements. Ils ont pour mission d’accompagner et de faciliter la mise sur marché d’innovations technologiques. Or, le propre d’une innovation est son caractère hypothétique incertain, car elle bouscule les habitudes et les pratiques routinières de l’industrie. L’incubation de entreprises technologiques ne se résume donc pas à l’accès à des ressources matérielles mais aussi processus de négociation pour donner aux inventions une légitimité et pour les faire accepter par marché. Nous montrons que ce processus requiert un accès à des ressources sociales. L’accès de nouveaux entrepreneurs à ces ressources se fait principalement à travers les réseaux sociaux dirigeants de l’incubateur, par un mécanisme de médiation et d’intermédiation. Cette médiation permet aussi un transfert de confiance, de crédibilité et de légitimité. Elle génère, en conséquence, un nouveau réseau pour le porteur de projet et facilite son intégration dans la communauté des entrepreneurs. / The valorisation of university research, through the creation of high technology enterprise, is a new mission assigned to universities since the enactment of the 1999 law, known as Allègre law. Technology incubators, which are new hybrid structures, have appeared at the border of three radically different spheres: universities, businesses and governments. Their mission is to support and facilitate the marketing of technological innovations. However, because of the uncertain and hypothetical nature of innovations, they disrupt habits and routines of the industry. Incubation of these technology companies can not then be summarized to access to material resources but as has to be also considered as a negotiating process which gives legitimacy to inventions in order to be accepted by the market. We show that this process requires also access to social resources. Access of these new entrepreneurs to these resources is done mainly through social networks of the managers of the incubator, through mediation and intermediation. This mediation allows a transfer of trust, credibility and legitimacy. Accordingly, it generates a new network for the entrepreneur and facilitates its integration into the community of entrepreneurs.

Master of Science / School of Family Studies and Human Services / Amber V. Vennum / Cyclical relationships (where multiple break-ups and renewals have occurred) have been characterized as being in a state of “stable instability” (Vennum & Johnson, 2015), and emerging adulthood has been deemed a critical phase of relational development and learning, as well as a time marked by instability (Arnett 2000; 2007). While the research continues to expand on what we know about the concurrent and enduring risks for distress associated with relationship cycling, little is known about what change mechanisms/interventions may reduce these risks, or how helping professionals (therapists, relationship educators) can specifically assist young adults in cyclical relationships. After conducting five focus groups, researchers found specific factors that promote or detract from “decision-making resiliency”, or DMR. Specific points of intervention for professionals working with cyclical relationships to promote DMR are discussed, which included identity development, communication, power/control dynamics and intentionality. Building off of what is known about the nuances of cyclical relationships, this study aims to inform assessments and intervention(s) that would help bolster resilience and decision-making skills in cyclical couples (or couples who have slid into relationships and are, thus, at risk for cycling) in an effort to reduce further distress.

Made available in DSpace on 2014-06-12T16:01:22Z (GMT). No. of bitstreams: 2 arquivo8454_1.pdf: 1957122 bytes, checksum: 699aaa50fd31e084b62a826525a3173c (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2011 / Esta dissertação oferece contribuições para o problema de verificação de assinaturas Off-line através da criação de um classificador baseado em morfismo utilizando uma técnica de triangulação de pontos apta a gerar imagens intermediarias entre duas ou mais assinaturas. Esta técnica permite verificar a distância entre as assinaturas de uma determinada classe, objetivando discriminálas como falsas ou genuínas. Neste trabalho cinco cenários foram avaliados, em todos foram utilizadas assinaturas genuínas, falsificações simuladas e aleatórias. Do primeiro ao quarto cenários examinam-se quanto à quantidade fixa de pontos por experimento, sendo o número de pontos 10, 40, 70 e 100 respectivamente. O quinto cenário é avaliado utilizando uma quantidade variável de pontos por experimento, onde foi obtido o melhor resultado, alcançando uma taxa de erro global de 0,18. Analisou-se também o impacto que o número de assinaturas usadas como referência influencia no desempenho do sistema. Utilizou-se uma base de assinaturas para teste composta por 10 autores