Orientador: Vitor Baranauskas / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação / Made available in DSpace on 2018-08-08T22:24:59Z (GMT). No. of bitstreams: 1 Degasperi_FranciscoTadeu_D.pdf: 5413263 bytes, checksum: 7251a00fbc05d996c38d70e8417d16ae (MD5) Previous issue date: 2006 / Resumo: O principal objetivo deste trabalho foi contribuir para o cálculo, análise e modelagem de sistemas de vácuo de uso geral. As contribuições ocorreram na criação, desenvolvimento e aprimoramento de ferramentas matemáticas tanto analíticas como numéricas para modelar e analisar detalhadamente sistemas de vácuo. Foram consideradas duas maneiras de modelar sistemas de vácuo, denominadas de formulação discreta e contínua. Na formulação discreta os sistemas de vácuo são tratados de modo que a pressão em função do tempo na câmara de vácuo pode ser obtida a partir de especificações das fontes de gases e vapores, das dimensões da linha de bombeamento e das bombas de vácuo. Foram considerados nos cálculos e nas modelagens os quatro regimes de escoamento presentes nos sistemas de vácuo em geral. Foram também consideradas em detalhe as condutâncias e as fontes gasosas importantes para processos em vácuo em geral, além de obtidas as expressões matemáticas para as curvas de velocidade de bombeamento das bombas de vácuo comumente utilizadas em circuitos de vácuo. Foram utilizados nas análises numéricas os métodos de Euler-Heun e Runge-Kutta de segunda e quarta ordens. Na formulação contínua os sistemas de vácuo foram modelados de forma que a pressão possa ser determinada em todas as suas partes e em função do tempo. Foram obtidas as equações de difusão para sistemas de vácuo unidimensionais, bidimensionais e tridimensionais estacionários e transientes. Foram estudados em detalhe e exemplificados sistemas de vácuo por meio das formulações discreta e contínua. Sistemas de vácuo com geometrias tubulares e planares foram modelados com o estabelecimento preciso das definições das grandezas condutância específica e throughput específico para as fontes de gases e condições de contorno pertinentes à descrição a partir de equações diferenciais parciais. Para exemplificar os conceitos e abordagens desenvolvidas, foram tratados de casos realísticos encontrados em laboratórios e na indústria / Abstract: The main propose of this work is to toward in modeling of general vacuum systems. In addition, the aims of this work are to create, develop and improve analytic and numerical mathematical tools in order to model and to analyze vacuum systems in detail. Two different modeling ways to vacuum systems have been considered, denoted discrete and continuum formulations. In the discrete formulation the vacuum systems are treated in a way such that inside the vacuum chamber the pressure as a function of time can be obtained from the specification of the gas and vapor sources, from the pumping line dimensions and from the choice of the vacuum pumps. The conductance and the gas sources were considered important to vacuum processes in general besides the mathematical expressions obtained to pumping speed curves of the vacuum pumps. The numerical analysis was done through the Euler-Heun and the Runge-Kutta of second and fourth order methods. In the continuum formulation the vacuum systems were modeled in a way such that the pressure can be determined in all parts and as a function of the time. To perform this modeling were defined specific conductance and specific throughput to general gas sources. Vacuum systems with one-dimension or tubular forms and two-dimensions or planar forms were studied in detail and exemplified with the definitions of the quantities and the appropriate partial differential equations boundary conditions. The concepts, definitions and approach were applied in realistic cases, with typical laboratory and industry dimensions / Doutorado / Eletrônica, Microeletrônica e Optoeletrônica / Doutor em Engenharia Elétrica

No description available.

Science teaching at the secondary level can be made more effective with the judicious utilization of a multi-media approach involving modem information and communication technologies that is entering the Indian educational system in general and the schools in Jammu region (J&K State), in particular, surely but slowly. A major impact of technology today in the field of education is that at all levels classrooms are becoming technology-rich learning environments and as such there is a need to conduct research to study the learning environments of technology-supported classrooms. The study described in this thesis utilized the Technology-Rich, Outcomes-Focused Learning Environment Inventory (TROFLEI), to study the perceptions of students' actual and preferred classroom learning environment in a technology-supported science classroom at the secondary level in an Indian school situation. An important aspect of this research was to determine the reliability and validity of this scale for use in Indian classroom settings. An attitude scale derived from the Test for Science Related Attitudes (TOSRA) for studying the attitude of students towards science was also employed and lastly the Questionnaire on Teacher Interaction (QTI) was used to analyze the teacher student interactions in a technology-supported science classroom environment. Data for research were collected from 700 secondary students in a co-educational Indian school in the city of Jammu. / The study reported that the TROFLEI and the QTI were reliable and valid instruments for assessing the psychosocial learning environments III a technology-supported classroom and the teacher-student interactions III such environments. Significant associations are also reported between the students' perceptions of their technology-supported learning environment and their perceptions of the teacher-student interactions with three learner outcomes; attitude towards science, academic efficacy and academic achievement. Significant gender differences in technology-supported learning environments have also been reported in this study. This research study happens to be the first of its kind in this region and should provide a thrust towards the use of technology-supported classrooms for effectively teaching other school subjects.

本研究主要探討汽車業向技術母廠取得技術及經由組織學習提升本身能力和累積知識基礎的過程，以擁有成功技術移轉經驗及優異學習能力的中華汽車為研究主體，結合技術移轉與組織學習兩個研究子題，探討中華與日本三菱技術移轉的過程及中華組織學習的情形，主要研究目的為探討組織在進行技術移轉後，如何將外部取得的技術與知識有效地移轉到組織內部，並經由組織的學習機制，在吸收、內化及整理後使知識在組織內儲存及擴散，並成為下一次創新的基礎。 本研究採用「個案研究法」，只選擇中華汽車一家企業以深度訪談的方式，深入地報導企業的實際做法並將完整知識流通的過程結合文獻發展命題。主要的結論有十四個：知識取得與轉換方面為「技術移轉的雙方針對各自所訂定的目標及不同的策略考量會有選擇性的移轉及應用技術」、「移轉技術的類型會影響技術移轉過程中的移轉媒介及溝通密度」、「移轉技術的內容不同將影響其傳遞及轉換的模式」、「技術接受者的技術成熟度與組織複雜度愈高將有助於提昇連續性技術移轉的成效」。知識吸收與內化方面為「組織中相對應的學習活動有助於技術移轉成效的提升及確保技術成功的移轉」、「組織的知識基礎及累積的技術實力有助於組織吸收能力的提升」、「負責技術移轉與傳遞的人員特性會影響知識吸收與內化的程度」。知識整理與整合方面為「跨越疆界者的角色有助於多元化知識與資訊的整理與交流」、「有效的知識系統或觀念架構是將個人的知識分布圖組成組織知識地圖的關鍵成功要素」、「建立知識地圖的觀念架構在收集、儲存、取用知識的過程中應有彈性以配合知識多樣化的特性」。知識儲存與擴散方面為「跨部門的協調與聯結機制有助於知識的儲存與擴散」、「組織須有分享的機制以促進知識的擴散」、「標準化的電子格式系統有助於提升知識儲存與取用的效率」。知識創新方面為「知識的創新必須建立在過去系統化知識的累積與知識在實踐中累積的經驗」。

Information technology (IT) is one of the fastest growing product groups on the market today (Babu et al., 2006). This technology has become inexpensive to produce and continues to improve in the areas of memory, speed, operating systems, weight, and audio/visual capabilities (Envirosris, 2000). All of these factors have led to a decrease in product lifespan and an increase in the amount of IT-waste produced. IT-waste contains a number of hazardous materials. If this waste is not managed appropriately it can create serious environmental and human health problems. In Canada, there are no federal policies in place to manage IT-waste. Management of IT-waste has largely been the responsibility of local governments. Consequently, there is no uniformity. A wide spectrum of management approaches ranges from ‘do nothing’ to enacting bans to prohibit this waste from entering landfills. Recently (April 1, 2009), a program (Ontario Electronic Stewardship Waste Electronic and Electrical Equipment- OES WEEE) has been created at the provincial level to help with IT management. Residential participation in this program remains voluntary. This research is exploratory and aims at examining the potential for a sustainable integrated waste management (IWM) plan for residential IT-waste, using the Regional Municipality of Waterloo (RMoW) as a case study. A multiple methods approach was employed to gain an understanding of IT-waste issues and to develop a set of sustainable IWM criteria for evaluation of the OES program and RMoW. Methods used to collect data included: a literature review, surveys, plan analysis, direct observation, key informant interviews, and archival research. A number of recommendations apply specifically to Waterloo Region. Others more broadly address local governments across Ontario for better management of residential IT-waste and other e-waste products.

Information technology (IT) is one of the fastest growing product groups on the market today (Babu et al., 2006). This technology has become inexpensive to produce and continues to improve in the areas of memory, speed, operating systems, weight, and audio/visual capabilities (Envirosris, 2000). All of these factors have led to a decrease in product lifespan and an increase in the amount of IT-waste produced. IT-waste contains a number of hazardous materials. If this waste is not managed appropriately it can create serious environmental and human health problems. In Canada, there are no federal policies in place to manage IT-waste. Management of IT-waste has largely been the responsibility of local governments. Consequently, there is no uniformity. A wide spectrum of management approaches ranges from ‘do nothing’ to enacting bans to prohibit this waste from entering landfills. Recently (April 1, 2009), a program (Ontario Electronic Stewardship Waste Electronic and Electrical Equipment- OES WEEE) has been created at the provincial level to help with IT management. Residential participation in this program remains voluntary. This research is exploratory and aims at examining the potential for a sustainable integrated waste management (IWM) plan for residential IT-waste, using the Regional Municipality of Waterloo (RMoW) as a case study. A multiple methods approach was employed to gain an understanding of IT-waste issues and to develop a set of sustainable IWM criteria for evaluation of the OES program and RMoW. Methods used to collect data included: a literature review, surveys, plan analysis, direct observation, key informant interviews, and archival research. A number of recommendations apply specifically to Waterloo Region. Others more broadly address local governments across Ontario for better management of residential IT-waste and other e-waste products.

No description available.

Es una aplicación del método de los elementos finitos (M.E.F) al cálculo de losas delgadas isotrópicas. Es pues un desarrollo de la función solución en suma de funciones a trozos. Dentro del M.E.F se utilizan como funciones interpolantes polinomios (integración numérica sencilla). La continuidad conseguida es C elevado a 1 (para el caso planteado representa convergencia monotónica ). Son elementos simples (de fácil extensión a láminas) y que forman una familia jerárquica (distintos grados de aproximación sin cambiar la malla). El primer elemento de la familia es el clough- felippa. Al final se dan resultados comparativos de algunas placas con otro tipo de elementos y la solución exacta. / It is an application of the Finite Element Method (F.E.M.) for Isotropic Thin Plates calculation. The Deformation is developed as polynomial piecewise functions, which have easy integration. The continuity demanded to de functions is C^1. With the chosen functions we have monotonic convergence. These simple elements constitute a Hierarchical Family, which allow several degree of approximation with the same mesh. The first element of the family is the Clough-Felippa one. The elements are of easy extension to shells. It is given comparative results between plates with other elements and the exact solution.

Diploma thesis is focused on the constructional project of the polyfunctional house with care service in the Havířov. The object consists of three blocks that are interconnected by the central corridor. Each block has four aboveground floors and one underground floor. The project solved the time and financial plan, the broader transport relations, the construction site equipment, the main construction machines and mechanisms, the study of the implementation of the main construction stages, the technological regulation for the horizontal supporting structures and the truss roof including the control and test plan, monolithic and brick structures.