Made available in DSpace on 2016-06-02T20:09:17Z (GMT). No. of bitstreams: 1 4800.pdf: 10440406 bytes, checksum: e74b9d2a19207b02796d6d5a98de2254 (MD5) Previous issue date: 2012-08-15 / Financiadora de Estudos e Projetos / The construction industry often related to high handwork production processes, which results in waste of physical and financial resources. The current great demand for new buildings leads to the need of industrialized elements, components and technologies in order to push the evolution of the construction process. In view of these aspects, modular coordination stands out as an excellent strategic tool since it aims to organize the dimensions of buildings, in order to reduce the variety of sizes in which the elements and components are produced, allowing its ready installation without the need of any modification. The structural masonry stands out in this direction since its design is guided by modular coordination, allowing the application of this concept and thereby to rationalize the subsystems of larger impact of the building: the partitions and the building structure. However, although this system contributes to the modular coordination, other construction components and elements must also have modular measures, being the element door an example. With that in mind, this research seeks to contribute to the dimensional standardization of "opening doors with one leaf" through the diagnosis of modular dimensions suitable for structural masonry designs. Initially, it was diagnosed the possible modular dimensions for the door space. The analyses resulted in the possible horizontal space before de door installation of widths with final 1 (61, 71, 81, cm) and 6 (66, 76, 86, cm). The vertical modular space is equal to 221 cm before any other construction element is added and 217 cm considering a regularization capping and floor tile over the slab (nominal). The width of wood door leaf is currently commercialized with dimensions ending with 0 (60, 70, 80, cm) and 2 (62, 72, 82, cm). These dimensions were diagnosed suitable to modular masonry design when combined with door post thickness of 2 and 2,5 cm respectively. However the 210 cm height, available in the market, proved to be inadequate. With this dimension a construction solution is need to fill the gap between the door and masonry, which is not wanted and becoming very undesirable today. The study leaded to the conclusion that a door leaf height of 212,5 cm would be ideal. Also, although it is possible wood-doors of 0 and 2 endings widths (current standard) changing the standards to width with endings dimensions of 3 (63, 73, 83, ... cm) and 8 (68, 78, 88, cm) would make possible to have the same width standard for door leafs of several materials (wood, metal). The metal doors of steel and aluminum are available in the market in several different. Although most of them are suitable for the modular dimensions the proposals are made here to standardize and reduce the number of different dimensions. The first one has lower impact, just recommends to eliminated some of the marketed dimensions standardizing to width endings with 1 (61, 71, 81, cm) and in height 211 cm. The other suggestion has higher impact, but allows the same dimensions for doors of different materials, thus having only one dimension standard for door leafs regardless of its material. / A construção civil é uma indústria muitas vezes vinculada a processos produtivos artesanais, refletindo em desperdício de recursos físicos e financeiros. A grande demanda por edificações leva a necessidade de industrializar elementos, componentes e tecnologias construtivas como alavanca ao desenvolvimento tecnológico e evolução do processo construtivo. Tendo em vista estes aspectos a coordenação modular se destaca como excelente ferramenta estratégica uma vez que objetiva organizar as dimensões das construções, de forma a reduzir a variedade de tamanhos nos quais os elementos e componentes são produzidos, permitindo seu uso sem modificações, cortes ou retoques. O sistema construtivo em alvenaria estrutural se destaca nesse sentido uma vez que é concebido através da coordenação modular, possibilitando fazer uso deste conceito e com isso racionalizar os subsistemas de maior impacto da edificação, a vedação e estrutura da edificação. No entanto, embora esse sistema contribua com a coordenação modular, os demais componentes e elementos construtivos que conformam a edificação, em sua maioria, não possuem medidas modulares, sendo o elemento porta um exemplo. Tendo isso em mente esta pesquisa busca contribuir com a padronização dimensional de portas de abrir com uma folha , através do diagnostico de dimensões modulares adequadas a projetos de alvenaria estrutural. Para tanto se diagnosticou os possíveis vãos modulares da alvenaria, apresentando na largura final 1 e 6 (nominal), e na altura 221 cm sem contrapiso e 217 cm com contrapiso e piso (nominal). No material madeira as larguras de folha de final 0 (zero) e 2 (dois), disponíveis atualmente no mercado, foram diagnosticadas adequadas a projetos de alvenaria estrutural quando combinadas respectivamente com batentes de 2 e 2,5 cm de espessura. Já a altura de 210 cm, disponível no mercado, se mostrou inadequada, apontando a necessidade de soluções para preencher o vão. Através do estudo diagnosticou-se como dimensões ideais de folhas de madeira, na largura final 3 (três) e 8 (oito), e 212,5 cm de altura (nominal). No caso das portas mistas, batente metálico envolvente e folha de porta de madeira, constatou-se como a melhor solução trabalhar com as dimensões de folha diagnosticadas ideais para portas de madeira, ao invés das dimensões disponíveis no mercado, possibilitando padronizar a dimensão do batente metálico assim como a folha da porta. As portas metálicas (aço e alumínio) se destacam por apresentarem dimensões disponíveis no mercado, largura e altura, adequadas a projetos de alvenaria estrutural. No entanto através do estudo diagnosticou-se duas soluções dimensionais mais adequadas, uma de menor impacto, padronizando somente as portas metálicas, sendo folhas de final 1 (um) na largura e 211 cm de altura, e outra de maior impacto buscando padronizar as dimensões de folha de porta metálica e de madeira, permitindo o intercambio destes materiais, portanto folhas de final 3 (três) e 8 (oito) com altura de 212,5 cm e batente padronizado em 1,5 cm (parte com rebaixo).

International Telemetering Conference Proceedings / October 22-25, 2001 / Riviera Hotel and Convention Center, Las Vegas, Nevada / Overview of video compression modules developed and flown as part of PSL’s flight-proven family of modular PCM components. Wavelet based video compression deck is compatible with PCM Encoder modules, allowing video to be included in instrumentation data stream. Video compression modules allow the user to select video frame rate and video quality, supports 8-16 bits/word, and non-symmetrical PCM matrices. Video Compression and formatting is achieved with a wavelet compression IC and specialized DSP code. Video output is achieved with PSL PCM Decommutator and Video Decompression Module.

Modular reinforcement learning is an approach to resolve the curse of dimensionality problem in traditional reinforcement learning. We design and implement a modular reinforcement learning algorithm, which is based on three major components: Markov decision process decomposition, module training, and global action selection. We define and formalize module class and module instance concepts in decomposition step. Under our framework of decomposition, we train each modules efficiently using SARSA($\lambda$) algorithm. Then we design, implement, test, and compare three action selection algorithms based on different heuristics: Module Combination, Module Selection, and Module Voting. For last two algorithms, we propose a method to calculate module weights efficiently, by using standard deviation of Q-values of each module. We show that Module Combination and Module Voting algorithms produce satisfactory performance in our test domain. / text

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The United States Navy is currently in a state of transition from mechanical to electric propulsion. Future warships, such as the new destroyer class, will contain an Integrated Power System (IPS) that provides power to all propulsion and ship service loads. These warships will likely have a dramatic increase in the number of power electronic loads, both AC and DC. For ship service loads, a DC Zonal Electric Distribution System (DCZEDS) will likely be used. DCZEDS requires a device that provides galvanic isolation between the feeder buses and the zones to prevent fault propagation between zones. For DCZEDS to be practical, DC-DC converters that provide galvanic isolation with an efficiency and reliability approaching that of existing low frequency AC isolation transformers must be placed between the feeder buses and the zones. This thesis examines the construction and operation of a prototype galvanically isolated DC-DC converter using commercial-off-the-shelf parts. The converter uses a single-phase high-frequency transformer link to provide galvanic isolation. This work shows that this converter topology is reliable enough to be used in an IPS. A three-phase solution using this topology can provide sufficient power density at the megawatt level, necessary for an interface converter in DCZEDS.

Modular approaches are widely used methods in AI and engineering. This approach reduces the difficulty of solving a complex problem by subdividing the problem into several smaller parts, i.e. modules, and tackle each independently. In this dissertation, we show how modular approaches can simplify grasping and manipulation problems of service robots. We use the modular approach to tame the difficulties in solving three main research problems in this field: grasp planning, object manipulation and reach motion planning. Different from industrial controlled environments, service robots have to handle abrupt changes and uncertainties occurring in dynamic and cluttered human centered environments. Planning behaviours in such an environment needs to be fast and adaptive to changing context. Programming robot with adaptive behaviours usually is a difficult task and takes a long time. By adopting modular approaches, the task difficulty is reduced as well as the programming time. The proposed approach is based on the method of imitation learning, sometimes referred to as the Programming by Demonstration (PbD). In this framework, we first let human or robot demonstrates possible solutions of the problem. After collecting the demonstrations, we extract multiple modules from the data. Each module represents a part of the system and their corresponding demonstrations are modeled with a statistical method. According to the environment condition, a set of appropriate modules are chosen to provide the final solution. In this dissertation, we present three different modular approaches in tackling three subareas in robot grasping and manipulation: grasp planning, object manipulation adaptive control and planning reaching motions. In Chapter 3, we propose a fast method for computing grasps for known objects and extend this method by a modular approach to work with novel objects. We implemented this method with two different robot hands: the Barrett hand and the iCub hand, and show that the computation time is always in the millisecond scale. In Chapter 4, we present our modular approach in extracting adaptive control strategies using human demonstrations of object manipulation tasks. We successfully implement this method to teach a robot an manipulation tasks: opening bottle caps. In Chapter 5, we present a method to model reaching motion primitives that would allow humans to modulate robot motions by verbal commands. This method is implemented to perform a bimanual lifting task. We show that the method can generate new motions to lift boxes with different sizes and at different locations. These three studies show that robot grasping and manipulation problems can indeed be divided into modules, the solutions of which can be combined to provide a whole solution to the original problems. With modular approaches, new solutions for novel scenarios can be integrated to the original solution without difficulty. This approach allows robots to accumulate their skills. In summary, we contribute three modular and learning hybrid methods in this dissertation: (1) a fast method for grasp planning; (2) a method to extract human manipulation skills from demonstrations for object manipulation; (3) a method to recognize motions and generate motions according to human commands.

Thesis. 1975. Ph.D.--Massachusetts Institute of Technology. Dept. of Mathematics. / Vita. / Bibliography: leaves 132-133. / by Nguyen Quang Hien. / Ph.D.

One of the fundamental differences between automorphic representations of classical groups like GL(n) and their metaplectic covers is that in the latter case the space of Whittaker functionals usually has a dimension bigger than one. Gelbart and Piatetski-Shapiro called the metaplectic representations, which possess a unique Whittaker model, distinguished and classified them for the double cover of the group GL(2). Later Patterson and Piatetski-Shapiro used a converse theorem to list the distinguished representations for the degree three cover of GL(3). In their milestone paper on general metaplectic covers of GL(n) Kazhdan and Patterson construct examples of non-cuspidal distinguished representations, which come as residues of metaplectic Eisenstein series. These are generalizations of the classical Jacobi theta functions. Despite some impressive local results to date, cuspidal distinguished representations are not classified or even constructed outside rank 1 and 2. In her thesis Wang makes some progress toward the classification in rank 3. In this dissertation we construct the distinguished representations for the degree four metaplectic cover of GL(4), applying a classical converse theorem like Patterson and Piatetski-Shapiro in the case of rank 2. We obtain the necessary local properties of the Rankin-Selberg convolutions at the ramified places and finish the proof of the construction of cuspidal distinguished representations in rank 3.

Typescript (photocopy). / Digitized by Kansas Correctional Industries