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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Finite element modeling of crack detection in aircraft structures using electrical current

Kumar Geetha, Ramkumar, January 2004 (has links)
Thesis (M.S.)--West Virginia University, 2004. / Title from document title page. Document formatted into pages; contains viii, 82 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 80-81).
2

ALTERNATE SCREENING PROCEDURES FOR SEMICONDUCTOR VISUAL INSPECTION

Guarin, Fernando, 1954- January 1987 (has links)
A sequence of electrical tests was developed to provide a viable alternative to the performance of high magnification visual inspection for high reliability integrated circuits in a large volume production environment. The primary approach was based on: close monitoring of the Substrate-N epi I-V characteristics, voltage overstress exposure and subsequent verification of the devices' low level leakage and thermal response. This method was implemented and evaluated for the specific case of a 16K Bipolar Schottky PROM. Reliability tests indicated that devices processed using the proposed alternate screen sequence achieved failure rates as low as those obtained using high magnification visual inspection.
3

Application of microprocessor in digital testing with special reference to magnetic core memory systems.

Ng, Chi-ho, January 1978 (has links)
Thesis (M. Phil.)--University of Hong Kong, 1979.
4

Application of microprocessor in digital testing with special reference to magnetic core memory systems

Ng, Chi-ho, 吳自豪 January 1978 (has links)
published_or_final_version / Electrical and Electronic Engineering / Master / Master of Philosophy
5

Caneta eletrocirúrgica monopolar de uso único: processo de limpeza e comportamento funcional elétrico no reprocessamento

Domenico, Taciane Mara di 20 December 2013 (has links)
Os produtos ou artigos médicos de uso único são utilizados na assistência à saúde há bastante tempo e acompanharam o avanço tecnológico da saúde. São produzidos a partir de materiais poliméricos e em sua maioria são termossensíveis. A caneta eletrocirúrgica monopolar de uso único-CEMUU está entre os produtos frequentemente reprocessados e é um acessório dos geradores eletrocirúrgicos que possibilita o uso da eletrocirurgia, técnica indispensável em muitos procedimentos. Os produtos de uso único deveriam ser descartados logo após o uso, no entanto, eles são reprocessados para serem utilizados novamente, principalmente sob a justificativa de redução de custos para os Estabelecimentos de Assistência à Saúde- EAS. Nos últimos anos vem aumentando a ocorrência de infecções por micobactérias resistentes, devido à falta de critérios seguros e os riscos que estes materiais podem trazer a saúde. Algumas pesquisas, ainda que divergentes, podem ser encontradas abordando esta problemática. A necessidade de regulamentação do processo do artigo em questão e ausência de normativas claras, voltadas para este artigo despertou o interesse no tema. O objetivo deste estudo foi verificar a prática de reprocessamento deste artigo na instituição campo do estudo sob o aspecto limpeza e funcionalidade elétrica. A avaliação da limpeza foi através de método químico 3M Clean Trace TM Surface ATP e as amostras foram coletadas antes da limpeza, após a limpeza manual e após limpeza automatizada e manual. A análise de funcionalidade ocorreu através de testes elétricos de impedância antes do primeiro uso, após o quinto uso e após o décimo uso. Como resultado, observou-se maior eficácia da limpeza quando empregado os dois métodos: automatizado e manual. As variações de valores após os testes elétricos revelaram que menos da metade da amostra (40%) manteve- se em bom estado até a quinta utilização. O que torna inseguro utilizar este artigo por mais de cinco vezes. A possibilidade de um segundo uso, ou até mesmo tercerceiro e quarto usos, só poderia ser afirmada repetindo os testes para reprocessos inferiores a cinco. / Products or medical single-use articles are used in health care for a long time and accompanied the technological advancement of health. They are made of polymeric materials and are mostly thermosensitive. The electrosurgical monopolar single-use scalpel - SUESE - is among the frequently recycled products and is an enhancement of electrosurgical generators that enables the use of electrosurgery, an essential technique in many procedures. The singleuse products should be discharged after one use; however, they are reprocessed for reuse mainly on the grounds of cost reduction in Health Care Institutions - EAS. In recent years the incidence of mycobacteria resistant infections has increased due to a lack of safety criteria as well as the risk that these materials can bring to health. Some research can be found addressing this problem. The need for regulation of the article in question and the absence of clear regulations focused on this article sparked interest in the topic. The aim of this study was to investigate the practice of reprocessing this article in the refered health institution under the aspect of cleaning and electrical functionality. The cleaning assessment was made by 3M Clean Trace ATP SurfaceTM chemical method and the samples were collected before cleaning, after manual cleaning and after automatized and manual cleaning. The functional analysis was made by electrical impedance test before first use, after the fifth use and after the tenth use. The results indicated more effective cleaning while two methods were employed: automated and manual. The variation values after electrical tests revealed that less than half (40 %) remained in good conditions until the fifth use which suggests that it is unsafe to reuse it up to the fifth time. The possibility of a second, third or fourth use could only be confirmed after testing the article more times.

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