Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, September 2002. / Thesis advisor(s): Tri Ha, Roberto Cristi. Includes bibliographical references (p. 69). Also available online.

Thesis (M. A.)--Marshall University, 2009. / Title from document title page. Includes abstract. Document formatted into pages: contains 43 p. Includes bibliographical references (p.42-43)

Thesis (doctoral)--Universität Munchen, 1935. / "Lebenslauf": p. [27] At head of title: Aus der Abteilung für Zahn- und Kieferersatz ... des Zahnärtzlichen Instituts ... der Universität München. Includes bibliographical references (p. [25-26]).

Thesis (M. Sc.)--University of Toronto, 1996. / Includes bibliographical references.

Thesis (Ph. D.)--University of Chicago, Dept. of Physics, March 2003. / Includes bibliographical references. Also available on the Internet.

Thesis (Ph. D.)--University of Missouri-Columbia, 2006. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (May 2, 2007) Vita. Includes bibliographical references.

Opbrengskoerse van vasterentedraende effekte verander as gevolg van veranderings in vraag en aanbod op die kapitaalmark. Die veranderinge in opbrengskoerse bei'nvloed die pryse van vasterentedraende effekte, asook van die opsies op hierdie effekte en stel beleggers in hierdie instrumente bloot aan beleggingsrisiko. Hierdie studie ondersoek die uitwerking van veranderings in die opbrengskoerse op die pryse van vasterentedraende eff ekte en opsies indien geen verskansing teen beleggingsrisiko toegepas word nie. Verder word verskillende verskansingstegnieke vergelyk ten einde te bepaal welke tegniek beleggingsrisiko die mees doeltreffendste kan beperk. Die studie toon aan dat dit wenslik is om beleggings en vasterentedraende effekte en opsies teen beleggingsrisiko te verskans. Empiriese toetse is op verskeie tegnieke gedoen om te bepaal watter verskansingstegnieke beleggingsrisiko die doeltreffendste kan beperk. Die gevolgtrekking is dat beleggingsrisiko inderdaad doeltreffend beperk kan word. Vir elke posisie in vasterentedraende en opsies is 'n spesifieke verskansingstegniek gei'dentifiseer om sodanige posisie doeltreffend in terme van winsgewendheid te verskans. / Yield on fixed interest bearing securities change as a result of changes in the supply and demand in the capital market. These changes in the yield influence the prices of fixed interest securities, as well as options on fixed interest securities and expose .investors in these instruments to investment risk. This study investigates the effect of changes in yield on the prices of fixed interest securities and options if no hedging against investment risk is instituted. Different techniques are compared to establish which technique will restrict investment risk effectively. This study shows that it is desirable to hedge investments in fixed interest securities and options against investment risk. Empirical tests were conducted on a variety of techniques to establish which technique would restrict investment risk effectively. The conclusion is that investment risk can be limited. A specific technique has been identified for each position in fixed interest securities and options that can hedge such a position effectively against investment risk in terms of profitability. / Business Management / MCOM (Bedryfsekonomie)

The work presented in this thesis was undertaken as part of the three-year ‘Jigless Aerospace Manufacture’ (JAM) project which was set-up to investigate and address the significant scientific, technological and economic issues to enable a new design, manufacture and assembly philosophy based on minimising product specific jigs, fixtures and tooling. The main goal of the JAM project at Cranfield was the development of appropriate jigless methods and principles, and the subsequent redesign of the JAM project demonstrator structure – a section of the Airbus A320 aircraft Fixed Leading Edge – to fully investigate and realise the capabilities of jigless methodologies and principles. The particular focus of research activity described in this thesis was the development of a methodology to design for jigless assembly and a process of selecting assembly features to enable jigless assembly. A review of the literature has shown that no methodologies exist to specifically design for jigless assembly; however, previous relevant research has been built upon and extended with the incorporation of novel tools and techniques. To facilitate the assembly feature selection process for jigless assembly, an Assembly Feature Library was created that broadened and expanded the conventional definition and use of assembly features. The developed methodology, assembly feature selection process and Feature Library have been applied and validated on the JAM project demonstrator structure to serve as a Case Study for the tools and techniques developed by the research. Additionally, a Costing Analysis was carried out which suggests that the use of the tools and techniques to enable jigless assembly could have a large and considerable impact on both the Non-Recurring and Recurring costs associated with the design, manufacture and assembly of aircraft.

Submitted by Aline Serrado de Pinho Barcellos null (alinebarcellosodonto@hotmail.com) on 2016-12-18T12:01:55Z No. of bitstreams: 1 dissertaçãoImpressão.pdf: 3771981 bytes, checksum: 5f352cb7c8b67d15d25214beae5fe249 (MD5) / Approved for entry into archive by Felipe Augusto Arakaki (arakaki@reitoria.unesp.br) on 2016-12-20T17:14:58Z (GMT) No. of bitstreams: 1 barcellos_asp_me_sjc.pdf: 3771981 bytes, checksum: 5f352cb7c8b67d15d25214beae5fe249 (MD5) / Made available in DSpace on 2016-12-20T17:14:58Z (GMT). No. of bitstreams: 1 barcellos_asp_me_sjc.pdf: 3771981 bytes, checksum: 5f352cb7c8b67d15d25214beae5fe249 (MD5) Previous issue date: 2016-11-04 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / O objetivo do estudo foi avaliar o comportamento mecânico de uma cerâmica, à base de dissilicato de lítio, em ensaio de flexão com as extremidades fixas. Este estudo particular tem similaridade com caso real de aplicação de prótese em pacientes, o que melhora a avaliação do material quando comparado a ensaios convecionais como o ensaio de flexão em três pontos, com viga simplesmente apoiada. Para isso os corpos de prova foram submetidos à três tipos de envelhecimento: ciclagem mecânica, ciclagem termomecânica, ambas de acordo com os protocolos utilizados na literatura, e ciclagem intrabucal. A ciclagem intrabucal foi realizada por meio da utilização de um dispositivo intrabucal semelhante a uma placa oclusal, na qual foram instalados os corpos de prova, por meio de um dispositivo metálico próprio. Estas placas foram utilizadas em dez voluntários por oito horas, durante o período noturno. As amostras foram posteriormente submetidas ao ensaio mecânico de flexão de três pontos com as extremidades engastadas, para avaliação da resistência residual. Os resultados de resistência residual foram submetidos à análise estatística descritiva (média e desvio padrão) e inferencial, mediante o teste paramétrico de análise de variância (ANOVA) um fator e o teste de Tukey ( = 0,05). As amostras representativas de cada grupo foram observadas em microscópio eletrônico de varredura para análise fractográfica. O tipo de ciclagem influenciou no comportamento mecânico da cerâmica, apresentando significância estatística (p = 0,000) e o grupo de ciclagem intrabucal mostrou a menor resistência à flexão. A origem da fratura foi na zona de tração, porém observou-se uma origem secundária localizada em zona de torção. Pode-se concluir que os tipos de ciclagens influenciaram no comportamento mecânico da cerâmica de dissilicato de lítio. As ciclagens mecânica, termomecânica e intrabucal reduziram a resistência à flexão do material. A ciclagem intrabucal foi a que mais reduziu a resistência residual em flexão deste tipo de cerâmica. / This study aimed to evaluate the behavior of lithium disilicate ceramic in similar condition to a partial fixed prosthesis of three elements by subjecting to three types of aging (n=10): mechanical cycling, thermomechanical cycling, both according to the protocols used in the literature, and intraoral cycling. The intraoral cycling was accomplished by using an intraoral device, which is similar to an occlusal splint. They were installed with the samples (CP) by means of a metallic device that was fixed in balanced contact condition with the remainder of the occlusal surface of the plate. These plates were used in ten volunteers for eight hours during the evening. After fatigue, the samples were subjected to three-point bending tests with clamped ends to evaluate the residual strength. The residual strength results were submitted to descriptive statistics (mean and standard deviation) and inferential by the parametric analysis of variance (ANOVA), with one factor and Tukey test ( = 0.05). In addition, representative samples of each group were observed in a scanning electron microscope (SEM) for fractographic analysis. The cycling condition influenced the mechanical behavior of ceramic with statistical significance of (p = 0,000), and the intraoral cycling group showed the lowest residual flexural strength. In fractographic analysis, they showed that the origin of fracture was in the tensile zone, but there was a secondary fracture origin represented by a twisted zone. Therefore, all types of cycling influenced the flexural strength of the material.

Orientador: Eulália Maria Martins Silva / Banca: Maria Cristina Rosifini Alves Rezende / Banca: Paulo Renato Junqueira Zuim / Banca: Renata Garcia Fonseca / Banca: Maria da Gloria Chiarello de Mattos / Resumo: No processo de fundição pela cera perdida, os materiais envolvidos podem apresentar interações entre si e o de tempo despendido para se obter as estruturas metálicas é oneroso. Assim, o objetivo deste trabalho foi avaliar a influência da propriedade física de resistência à compressão de revestimentos fosfatados indicados para altas temperaturas de fundição, utilizando os métodos de aquecimento convencional (MAC) e rápido (MAR), e analisar a rugosidade de superfície e a alteração dimensional do produto final da fundição (a peça metálica) obtido com as ligas metálicas Ni-Cr (Verabond II) e Ni-Cr-Ti (Fit Cast Titanium). Os revestimentos estudados Castorit Super C, Castorit All Speed, Heat Shock e Micro Fine 1700 foram vazados em uma matriz de silicone que permitiu obter amostras com formato cilíndrico (n=200), medindo 10mm de diâmetro e 20mm de comprimento. A resistência (MPa) deles foi determinada à temperatura ambiente (resistência fria) após 15, 30 e 60 minutos de manipulação, e também imediatamente após serem submetidos aos métodos de aquecimento MAC e MAR (resistência de queima), por meio de uma máquina de ensaio universal, em velocidade de 0,05mm/min e carga de 150kgf. Após inclusão, aplicação dos métodos de aquecimento e fundição às amostras (n=120) para rugosidade de superfície (Ra-μm), foram avaliadas por um rugosímetro Mitutoyo Surftest SJ-401 com cut-off de 0,8mm e três repetições em cada amostra. A alteração dimensional foi determinada pela diferença entre os valores dimensionais da cera e da peça fundida (n=60) utilizando-se o software AutoCad2008. Os valores médios obtidos foram submetidos à análise de variância (ANOVA) e ao teste de Tukey (p<0,05), apresentando os valores de resistência à compressão diferentes entre os revestimentos (Heat Shock os valores maiores) e entre os tempos de mensuração em relação... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: In the lost wax casting procedure, the involved materials can present interactions among them and the time used to obtain the metallic structures is onerous. Thus, the purpose of this study was to evaluate the influence of the compressive strength physical property of phosphate-bonded investment materials indicated for high casting temperatures, utilizing conventional heating (CHM) and quick heating methods (QHM), and analyze the surface roughness and the dimensional accuracy of the final casting product (the metallic piece) obtained from Ni-Cr (Verabond II) and Ni-Cr-Ti (Fit Cast Titanium) metallic alloys. Castorit Super C, Castorit All Speed, Heat Shock and Micro Fine 1700 investment materials were poured into a silicone matrix in order to obtain cylindrical samples (n=200), measuring 10mm in diameter and 20mm in length. Their strength (MPa) was determined at room temperature (green strength) after 15, 30 and 60 minutes of manipulation, and also immediately after being submitted to the CHM and QHM heating methods (fired strength), by means of an universal testing machine at 0,05mm/min speed and 150kgf load. After investing, applying the heating methods and casting the samples (n=120) for surface roughness (Ra), the samples were evaluated with a Mitutoyo Surftest SJ-400 profilometer with 0,8mm cut-off, three times in each sample. The dimensional accuracy was determined by the difference among the dimensional values of the wax and of the metallic piece (n=60) through the software AutoCad2008. The mean values obtained were submitted to ANOVA and Tukey tests (p <0.05), and the results showed that the values of compressive strength were different among the investment materials (Heat Shock presenting the highest values) and among the analysis times with a direct relation of time and strength increase, but there was no difference between CHM and QHM. Moreover, it was observed no differences... (Complete abstract click electronic access below) / Doutor