Typescript (photocopy). / Digitized by Kansas Correctional Industries / Department: Computer Science.

<p>Westhelicopter INC. has an aviation workshop providing qualified helicopter maintenance in accordance with PART-145. Maintenance and administrative base is situated in Luleå at Kallax airport. <strong>The types that Westhelicopter INC are currently authorised to service are: </strong>Eurocopter AS 350 Base/Line Maintenance, Eurocopter EC 120 Base/Line Maintenance and Robinsson R44 Base/Line Maintenance.</p><p> </p><p>The thesis work has been to make new maintenance programme for Westhelicopter INC. This maintenance programme will be used to follow-up the time of the components, service bulletins and ADs. Existing materials, as maintenance manuals and interviews with technical staff, was used to make more efficient maintenances programme. Work will be applied to all helicopters that Westhelicopter AB supplies.</p>

Pas de résumé en français

Westhelicopter INC. has an aviation workshop providing qualified helicopter maintenance in accordance with PART-145. Maintenance and administrative base is situated in Luleå at Kallax airport. The types that Westhelicopter INC are currently authorised to service are: Eurocopter AS 350 Base/Line Maintenance, Eurocopter EC 120 Base/Line Maintenance and Robinsson R44 Base/Line Maintenance.   The thesis work has been to make new maintenance programme for Westhelicopter INC. This maintenance programme will be used to follow-up the time of the components, service bulletins and ADs. Existing materials, as maintenance manuals and interviews with technical staff, was used to make more efficient maintenances programme. Work will be applied to all helicopters that Westhelicopter AB supplies.

Virtual community (VC) provides a place for people to communicate and form friendship in cyberspace. Researchers found that the business benefits only occur when members have loyalty towards VCs. This study focuses on factors that affect people¡¦s loyalty towards VCs. First, we study related papers, and did a survey to experienced VC members, to find out the more complete factors that affect them. Then, we did a second survey of Formosa Bulletin Board System members to discover the different important ratings in these factors. According to the survey result, we grouped 23 factors into 4 components: Content, VC Management, VC Brand, and Communication. The result shows ¡§Content¡¨ is the most important component, and different demographic segments, like gender, age, jobs, VC using time, Internet Using time, etc, will show different rating in the components mentioned previously. This study suggests VC managers take good care of ¡§the quality of information content¡¨, and encourage members to create their own content, and form friendships with other users to increase members¡¦ loyalty toward VCs.

published_or_final_version / Architecture / Doctoral / Doctor of Philosophy

Thesis (Ph. D.)--University of Missouri-Columbia, 1998. / Typescript. Vita. Includes bibliographical references (leaves 144-150). Also available on the Internet.

Thesis (Ph. D.)--University of Missouri-Columbia, 1998. / Typescript. Vita. Includes bibliographical references (leaves 144-150). Also available on the Internet.

Thesis (M.A.)--University of Hong Kong, 2001. / Includes bibliographical references (leaves 70-76). Also available in print.

El objetivo general del presente trabajo de título es la implementación de un sistema de votación electrónica apropiado para una votación local a pequeña escala. Además, este trabajo analiza las condiciones y supuestos razonables bajo los cuales tal elección puede ser llevada a cabo exitosamente. En este trabajo se estudian los mecanismos criptográficos adecuados para implementar un sistema de votación correcto, verificable y cuyos votos sean privados. El sistema implementado cumple con las características de seguridad de un sistema de votación electrónica, es práctico y puede ser usado en votaciones de pequeña escala. Este sistema considera la existencia de varias autoridades electorales, las cuales necesitan cooperar para que la elección sea exitosa, y solamente la colusión de la mayoría de ellas puede poner en riesgo la privacidad de los votantes. Se realizaron diversas votaciones de prueba, las que ilustran como el sistema implementado es capaz de detectar tanto alteraciones de los votos, como autoridades que traten de alterar el proceso eleccionario. El sistema es eficiente y transparente y entrega resultados precisos en forma rápida y oportuna. El proceso completo es universalmente verificable, desde la generación de las claves de encriptación que se usaran durante la elección, hasta el cómputo final, pasando por la verificación de la correctitud de los votos emitidos. Se concluye que es factible implementar un sistema de votación electrónica práctico, seguro y eficiente con requisitos simples: conectividad de red entre los participantes, mecanismos de comunicación consistente de mensajes (broadcast) entre las autoridades y observadores externos, e infraestructura para manejar claves públicas y privadas de los votantes. Finalmente se entregan recomendaciones para extender el sistema a elecciones de gran escala.