Tesi sul tema "Livre de base"
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Bihuna, Eliane. "A base dinâmica na existência de autovalores duplos no modelo de Timoshenko para uma viga uniforme livre-livre". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2005. http://hdl.handle.net/10183/6160.
Testo completoBezerra, Rayza Araújo. "Modelagem e controle de robô manipulador de base livre flutuante com dois braços". Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/18/18153/tde-04082015-112812/.
Testo completoSpace robotics research faces unique problems, which are mainly related to the intrinsic nature and dynamic characteristics of its systems. As a consequence, modelling becomes essential to guarantee the best system result. A important characteristic of space robotic arms is that their movements affect their bases position and attitude. This property must be taken into account, specially in the case of free floating space manipulators which have no control system for the base. High dexterity and flexibility of multi-arm manipulators cause their research to be a focus for the community. With higher loads and accuracy demands, they are more likely to suceed in tasks such as maintenance, assembly, refueling, among others. In that context, this thesis aims to develop a model for a dual-arm free-floating space manipulator. The model, then, is used in the design of a control system. The suggested methodology makes the process easier not only the modelling, but also the controller design. Two control schemes were developed: one in joint and the other in task space, with different trajectories. System simulations were run on Simulink (MATLAB) and the obtained results were discussed, with comments regarding fault situations for the specified control systems.
Bueno, José Nuno Almeida Dias. "Controle robusto para robô manipulador espacial planar de base livre flutuante com dois braços". Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/18/18153/tde-31082017-093441/.
Testo completoRobotic manipulators gained greater importance in space operations by being able to replace humans in dangerous or very long and repetitive tasks. Free-floating manipulators are highlighted, because they can be coupled to satellites or space stations and represent a great challenge to control engineers. These robots have two operation modes: controlled base and free-floating base. In the first mode, the base has its attitude and translation controlled by propulsion jets or reaction wheels, so that the robot behavior is similar to a fixed-base manipulator. However, there is considerable fuel and electrical energy consumption, besides additional disturbances inserted in the system. In the second mode, which is considered in this work, the base is not controlled during operation and is able to move freely in response to movements of the arm. Even though there is a remarkable fuel and electrical energy saving, the dynamic coupling between base and arm must be taken into account during modelling and controller design. To model the space manipulator considered in this work the Dynamically Equivalent Manipulator method was used, which maps a free-floating manipulator into a underactuated fixed-base manipulator. Thus, it is possible to apply known control techniques for terrestrial manipulators on free-floating ones. This work discusses robust and adaptive controllers applied on a planar dual-arm free-floating space manipulator in order to track trajectories defined in the workspace. The considered control systems are: Robust Recursive Linear Quadratic Regulator, Robust H-infinity and Adaptive Sliding Modes. Results showed that the controllers had distinct performances but were still able to perform trajectory tracking in workspace with very small tracking errors. A quantitative comparison was also elaborated with performance indexes considering integral of torques and L2 norm of tracking errors.
Guarda, Emerson Adriano. "Avaliação de Poli (cloreto de vinila) livre de estabilizantes térmicos à base de chumbo". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2002. http://hdl.handle.net/10183/3869.
Testo completoDifferent thermal stabilizers for rigid PVC had been evaluated comparatively for determination of its effectiveness. Stabilizers based on calciumzinc, barium-cadmium, and calcium-zinc-lead had been compared with one based on lead, already used commercially. The PVC formulations were analysed by thermogravimetry, torque and capilary rheometry, infra-red spectroscopy and scaning electron microscopy. All the techniques were very useful in the PVC compounds thermal stability avaliation. None of the lead free PVC compounds had upper performance to that on containig lead, showing the difficulty of the lead stabilizers substitution for rigid PVC.
Benevides, João Roberto Soares. "Planejamento de rota para manipulador espacial planar de base livre flutuante utilizando o algoritmo RRT". Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/18/18153/tde-20052015-085004/.
Testo completoAs major challenge in the field of robotics, path planning has experienced successful results in recent years by means of the RRT algorithm. However, the application of such algorithms in space manipulators reveals a scenario yet to be explored. The non-holonomic behavior, added to the presence of dynamic singularities are only a few factors that make collision-avoidance path planning of these systems such a hard task. Besides, works in the field of motion planning of space manipulators often concentrate in the strategy pointto- point, with particular interest in the complex dynamics of such systems. As a rule of thumb, collision-avoidance for space manipulators depends on a previous computed path. However, this task still lacks robust formulations, specially in the case of free-floating manipulators. With this motivation, the proposed work creates a collision-avoiding path planning for a free-floating planar manipulator. The dynamic model is based on the Dynamically Equivalent Manipulator and the concept of Rapidly-Exploring Random Trees serves as a frame for the developed algorithm.
Serrantola, Wenderson Gustavo. "Planejamento de rota e trajetória para manipulador planar de base livre flutuante com dois braços". Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/18/18153/tde-06112018-103624/.
Testo completoRobot manipulator has played an important role in orbital missions and this was possible due to the advance of space robotics in recent decades. However, motion planning is still considered one of the biggest challenges of the field though various methods and considerations were proposed by researchers to handle this problem. The first contributions in this field were dependent on an explicit representation of the free configuration space. Consequently, it was impractical to solve the motion planning problem for robotic systems with many degrees of freedom. In order to cope with this limitation, sampling-based methods were proposed, in particular, the Rapidly-Exploring Random Tree – RRT. Sampling-based methods only requires a procedure to verify collision with obstacles for a discrete amount of robot configuration during planning. Therefore, they are more advantageous in computational terms. In this work a path planner and a trajectory planner were developed for a free-floating planar manipulator with two arms with support for static obstacle avoidance. The Dynamically Equivalent Manipulator approach was used for modelling the robot. Thus, the planners were developed based on a fixed-base underactuated manipulator model which is dynamically equivalent to the free-floating manipulator. The sampling-based algorithms RRT* and RRTControl of the Open Motion Planning Library (OMPL) were adapted to solve this motion planning problem. The RRT* were used for path planning, and the RRTControl for trajectory planning, both carried out in the robot joint space. As the desired orientations and positions of the two end-effectors were specified in the task-space, a genetic algorithm was also developed to compute the inverse kinematics of the manipulator.
Lima, Nayane Maria de Amorim. "ObtenÃÃo, caracterizaÃÃo e propriedades espectroscÃpicas de meso-porfirina base livre e coordenada ao Ãon TÃrbio". Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=16053.
Testo completoThe synthesis of porphyrins and metalloporphyrins have become growing consistently due to their applications in technological and medical processes, which involve chemical modifications by introducing different substituents and metal ions in the macrocycle ring. These modifications cause changes in the spectroscopic properties of these compounds resulting from the disturbance of the π conjugated system. Therefore, this work involves the synthesis, characterization and investigation of the spectroscopic properties of two meso porphyrins with different side chains, the 5,10,15,20-tetra[4-(2-(3-n-pentadecilfenoxi) ethoxy] phenilporphyrin and 5,10,15,20-tetrahydro-4-[3-(3-n-pentadecilfenoxi)propoxy] phenilporphyrin, both derived from cardanol, one of the components of the cashew nut shell liquid (CNSL), further obtaining the metalated complex with the Terbium ion [Tb (3-n-PDPP)(acac)]. The absorption spectrum of the UV-Vis meso porphyrins, presented a set of bands which are consistent with the meso structures: a Soret band λ = 422 and 424 nm and four Q bands between 500 and 649 nm. The fluorescence spectrum from porphyrins meso showed an intense emission band λ = 654-658 nm and another low intensity at λ = 713-716 nm. The excitation spectrum showed the same absorption spectrum profile, showing that the emission arises from absorption of the Soret and Q bands, generating fluorescent radiative transition. As for the metalated form [Tb (3-n-PDPP) (acac)], factors like the choice of Terbium salt, solvent and reaction stoichiometry were determinant to obtain it. The characterization analysis of the complex gave the following results: reduction the number of Q bands; absence of the signal relating to the central porphyrin hydrogens in the 1H NMR spectrum (-2,4 ppm); presence of a band characteristic of the axial deformation of the C=O group regarding the axial ligand acetylacetonate; the presence of three bands at λ = 597 nm, λ = 654 nm and λ = 718 nm on the fluorescence emission spectrum. It was also determined the quantum yield of the two porphyrin free base and complexes with the metal ions zinc and terbium, in order to verify the influence of metal ion and the side substituents on the spectroscopic properties of these compounds.
Lima, Nayane Maria de Amorim. "Obtenção, caracterização e propriedades espectroscópicas de meso-porfirina base livre e coordenada ao íon Térbio". reponame:Repositório Institucional da UFC, 2015. http://www.repositorio.ufc.br/handle/riufc/16936.
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The synthesis of porphyrins and metalloporphyrins have become growing consistently due to their applications in technological and medical processes, which involve chemical modifications by introducing different substituents and metal ions in the macrocycle ring. These modifications cause changes in the spectroscopic properties of these compounds resulting from the disturbance of the π conjugated system. Therefore, this work involves the synthesis, characterization and investigation of the spectroscopic properties of two meso porphyrins with different side chains, the 5,10,15,20-tetra[4-(2-(3-n-pentadecilfenoxi) ethoxy] phenilporphyrin and 5,10,15,20-tetrahydro-4-[3-(3-n-pentadecilfenoxi)propoxy] phenilporphyrin, both derived from cardanol, one of the components of the cashew nut shell liquid (CNSL), further obtaining the metalated complex with the Terbium ion [Tb (3-n-PDPP)(acac)]. The absorption spectrum of the UV-Vis meso porphyrins, presented a set of bands which are consistent with the meso structures: a Soret band λ = 422 and 424 nm and four Q bands between 500 and 649 nm. The fluorescence spectrum from porphyrins meso showed an intense emission band λ = 654-658 nm and another low intensity at λ = 713-716 nm. The excitation spectrum showed the same absorption spectrum profile, showing that the emission arises from absorption of the Soret and Q bands, generating fluorescent radiative transition. As for the metalated form [Tb (3-n-PDPP) (acac)], factors like the choice of Terbium salt, solvent and reaction stoichiometry were determinant to obtain it. The characterization analysis of the complex gave the following results: reduction the number of Q bands; absence of the signal relating to the central porphyrin hydrogens in the 1H NMR spectrum (-2,4 ppm); presence of a band characteristic of the axial deformation of the C=O group regarding the axial ligand acetylacetonate; the presence of three bands at λ = 597 nm, λ = 654 nm and λ = 718 nm on the fluorescence emission spectrum. It was also determined the quantum yield of the two porphyrin free base and complexes with the metal ions zinc and terbium, in order to verify the influence of metal ion and the side substituents on the spectroscopic properties of these compounds.
A síntese de porfirinas e metaloporfirinas vêm se tornando cada vez mais crescente devido as suas aplicações em processos tecnológicos e medicinais, os quais envolvem modificações químicas através da introdução de diferentes substituintes e íons metálicos no anel macrociclo. Essas modificações provocam mudanças nas propriedades espectroscópicas destes compostos decorrentes da perturbação do sistema π conjugado. Assim, o presente trabalho envolve a síntese, caracterização e a investigação das propriedades espectroscópicas de duas meso porfirinas com cadeias laterais diferenciadas, a 5,10,15,20-tetra-[4-(2-(3-n-pentadecilfenoxi)etoxi]fenilporfirina e a 5,10,15,20-tetra-4-[3-(3-n-pentadecilfenoxi)propoxi]fenilporfirina, ambas derivadas do cardanol, um dos constituintes do Líquido da Casca da Castanha de Caju (LCC), além da obtenção do complexo metalado com o íon térbio [Tb(3-n-PDPP)(acac)]. O espectro de absorção UV-Vis das meso porfirinas, apresentou um conjunto de bandas as quais são compatíveis com as meso estruturas: uma banda Soret λ= 422 e 424 nm e quatro bandas Q entre 500 e 649 nm. O espectro de fluorescência das meso porfirinas apresentou uma banda de emissão intensa em λ= 654-658 nm e outra de pouca intensidade em λ=713-716 nm. O espectro de excitação apresentou o mesmo perfil do espectro de absorção, revelando que a emissão advém das absorções das bandas Soret e Q, gerando a transição radiativa fluorescente. Quanto à forma metalada [Tb(3-n-PDPP)(acac)], fatores como a escolha do sal de térbio, o solvente e a estequiometria da reação foram determinantes para sua obtenção. As análises de caracterização para o complexo obtiveram os seguintes resultados: redução do número de bandas Q; ausência do sinal referente aos hidrogênios centrais da porfirina no espectro de RMN de 1H (-2,4 ppm); presença de uma banda característica de deformação axial do grupamento C=O referente ao ligante axial acetilacetonato; presença de três bandas em λ= 597 nm, λ= 654 nm e λ= 718 nm no espectro de emissão de fluorescência. Também foi determinado o rendimento quântico das duas porfirinas base livre e dos complexos com os íons metálicos zinco e térbio, com o intuito de verificar a influência do íon metálico e dos substituintes laterais nas propriedades espectroscópicas destes compostos.
Alonso, Lais. "Análise comparativa da eficiência fotodinâmica de fotossensibilizadores em sua forma base livre e formando complexados com zinco". Universidade Federal de Goiás, 2014. http://repositorio.bc.ufg.br/tede/handle/tede/3962.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
Photodynamic therapy (PDT) is a technique that has been increasingly used in cancer treatment. It consists in introduce a photosensitizer (PS) in cancerous tissue and irradiate it with light in the visible range. Targeting a more effective treatment of PDT, currently there are several studies on the efficacy of these PS. In this work, we studied the photodynamic efficiency seven PS: meso-tetrametilpiridil, meso-tetrasulfonatofenil and carboxiftalocianinas with their base free or metallated with zinc atom in its center ring and protoporphyrin IX. Erythrocytes suspended in 2 to 10% hematocrit were treated with or without 25 μM of PS were exposed to light from a halogen lamp, and measured the time required to obtain 50 % hemolysis (T1/2). To examine whether the photodynamic efficiency is related to the affinity of PS by membrane, we performed measurements of the octanol/water partition coefficient (PO/W) of each PS. Our results indicated that the PS studied were very hydrophilic and showed a trend for greater photodynamic efficiency the PS with higher Log PO/W. To better understand the mechanism of action of the studied PS the degree of lipid peroxidation in erythrocyte membranes irradiated with PS was assessed by measuring the formation of malondialdehyde (MDA) and a correlation between the rate of peroxidation and hemolytic potential was found. The ability of PS to degrade proteins was assessed using bovine serum albumin (BSA), monitoring the fluorescent signal of this protein into solution and under irradiation in the presence of PS.
A terapia fotodinâmica (PDT) é uma técnica que tem sido cada vez mais utilizada no tratamento de câncer. Consiste em introduzir um fotossensibilizador (FS) no tecido cancerígeno e irradiá-lo com luz na faixa do visível. Visando um tratamento de PDT mais eficaz, atualmente existem vários estudos da eficiência desses FS. Neste trabalho, estudamos a eficiência fotodinâmicas de sete FS: meso-tetrasulfonatofenil, meso-tetrametilpiridil e carboxiftalocianinas em suas formas de base livre bem como metaladas com átomo de zinco em seu anel central e a protoporfirina IX. Eritrócitos em suspensão no hematócrito de 2 ou 10%, tratados ou não com 25 μM do FS, foram expostos à luz de uma lâmpada halógena e medido o tempo necessário para se obter 50% de hemólise (T1/2). Para examinar se a eficiência fotodinâmica está relacionada com a afinidade do FS por membrana, realizamos medidas do coeficiente de partição octanol/água (PO/W) de cada FS. Nossos resultados indicaram que os FS estudados foram muito hidrofílicos e demonstraram uma tendência para maior eficiência fotodinâmica os FS com maior Log PO/W. Para compreender melhor o mecanismo de ação dos FS avaliamos o grau de peroxidação lipídica nas membranas de eritrócito irradiado com FS, medindo a formação de malondialdeído (MDA) e encontramos uma correlação entre o índice de peroxidação e potencial hemolítico. A capacidade dos FS degradarem proteínas foi avaliada usando albumina de soro bovino (BSA), monitorando o sinal fluorescente desta proteína em solução e sob a irradiação na presença do FS.
Kehrwald, André Michel. "Estudo da influência da energia livre superficial na molhabilidade e adesão de revestimentos à base de fluorsilanos". reponame:Repositório Institucional da UFSC, 2013. https://repositorio.ufsc.br/handle/123456789/106636.
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A engenharia de superfície tem atraído à atenção da indústria e comunidade científica em razão ao desenvolvimento de materiais com características superficiais específicas. Dentre os estudos com superfícies, pesquisas com fenômenos atribuídos à energia livre superficial, tais como molhabilidade e adesão vêm se destacando recentemente devido ao potencial em aplicações tecnológicas. Neste trabalho, visando avaliar a utilização do fluorsilano como revestimento repelente a água e óleos, assim como antiaderente à resina epóxi, amostras de aço inoxidável AISI 430 previamente limpas a plasma (Ar/H2) ou ataque químico (solução piranha) foram revestidas com esse material. O emprego de técnicas de caracterização como espectroscopia no infravermelho por transformada de Fourier (FTIR), espectroscopia Raman, espectroscopia fotoeletrônica de raio-X (XPS), termogravimetria (TG), microscopia eletrônica de varredura (MEV), interferometria ótica, ângulo de contato e ensaio de adesão possibilitaram avaliar características físico-químicas do fluorsilano tais como: grupos funcionais, temperatura de degradação térmica, morfologia da superfície, energia livre superficial, molhabilidade a água e óleos e adesão à resina epóxi. Os resultados revelaram que o fluorsilano apresentou reduzida energia livre superficial em razão a presença de estáveis grupos CFx na sua estrutura e por esse motivo comportou-se como material hidrofóbico, oleofóbico e com antiaderência à resina epóxi superior ao aço inoxidável; demonstrando ser um potencial revestimento para aplicações repelentes a substâncias sólidas e líquidas.
Cedra, Cristiano. "Uma nova proposta para o treinamento do arremesso de lance livre no basquetebol". Pontifícia Universidade Católica de São Paulo, 2007. https://tede2.pucsp.br/handle/handle/16805.
Testo completoThe free throw is a kind of basketball shot and it occurs as a result of breaking some of the rules of the game. Approximately 25% of all points earned in a basketball game come from free throws. In basketball teaching or practicing, free throws are usually the first kind of shot taught, forming the basis for more advanced shooting techniques. Despite its importance, average free throw accuracy has been below 70%; only a few players have managed to achieve a higher average. In this paper a new method of free throw training is presented by progressive and gradual techniques aimed towards specifications changes in materials used in training (in this case, the diameter of the basketball rim and its height). Starting from basic conditions (larger diameters and lower baskets) to those seen as more complex (basketball s official specifications), trying to reach gradually the average accuracy in professional basketball free throwing. In this research, 12 athletes aged from 13 to 14 years old were chosen from a competitive basketball team to participate in it. Then, they were submitted to two stages at the baseline condition. In the first stage, 39 sessions of 10 free throws were shot in each session. In the second stage, the athletes had 13 sessions of 30 shots in each session, out of which 10 were shot from the official free throw line, 10 from an intermediate distance between the free throw line and the basket and the last 10 were shot very close to the basket. After this stage, the athletes were divided into two groups: group 1 was submitted to an intervention related to the diameter of the basket and group 2, to an intervention related to the height of the basket. The fading procedure was identical for both groups that went through the multielement baseline design. Each athlete went through 9 fading practice stages, and, in every stage, should score at least 70% of the free throws to go on to the next stage. Stage 1 was carried out using a closer distance to the basket and a larger diameter (group 1) or a lower height (group 2). Progressively, the distance was increased, passing through the intermediate distance until reaching the official free throw distance, keeping to the same diameter and height specifications. When the athlete reached the official distance, he would go back to the starting line and resume his shooting but now the diameter and height would be set to the intermediate specifications. Gradually, the athlete should reach the official distance and specifications of basketball. The next stage was identical to the baseline condition and had the purpose of evaluating whether the results achieved in the last modified stage would last once the treatment was removed. Analyzing the results, it is made clear that practicing shots through repetition did not produce the results expected in the selected group, at best, it only established their previous marks. Being exposed to different distances without using progression through fading also did not bring improvements to the performance of the athletes and the level of accuracy in the closest distance was higher than in the intermediate distance, which was also higher than in the official distance suggesting that distance is a decisive factor when evaluating basketball shots. While group 1 achieved an overall improvement throughout the practice, some of the athletes in group 2 actually showed a loss in performance, suggesting that the diameter of the rim is, in fact, a more critical factor than the height of the basket. The fading procedure has brought improvements to the level of accuracy of the evaluated athlet
O lance livre é um tipo de arremesso do basquetebol e ocorre como conseqüência a algumas infrações à regra deste jogo. Aproximadamente, 25% dos pontos do jogo de basquetebol vêm do lance livre. No ensino e treinamento do basquetebol é o primeiro tipo de arremesso a ser ensinado servindo de base para os demais. Apesar da sua importância, as médias de acertos nestas situações tem sido inferiores a 70%, apenas alguns jogadores atingem médias superiores. Neste trabalho apresentamos um novo método de treinamento de lances livres através das técnicas de mudança gradual e progressiva das alterações nas especificações dos materiais utilizados nos treinos (no caso, o diâmetro do aro da cesta e a altura da cesta), indo de condições consideradas como mais simples (diâmetros maiores e cestas em alturas mais baixas) para aquelas vistas como mais complexas (especificações oficiais), tentando, gradualmente, atingir o objetivo de acertos dos arremessos de lances livres na cesta oficial do basquetebol. Foram participantes desta pesquisa 12 atletas, com idade entre 13 e 14 anos, integrantes de uma equipe competitiva de basquetebol. Estes foram submetidos a duas fases na linha de base. Na fase 1, realizaram 39 sessões com 10 arremessos de lances livres em cada sessão. Na fase 2, realizaram 13 sessões com 30 arremessos em cada sessão, sendo 10 da distância oficial de lance livre, 10 de uma distância intermediária entre a linha do lance livre e a cesta, e mais 10 bem próximos da cesta. Após esta etapa, os atletas foram divididos em dois grupos: o grupo 1 foi submetido à intervenção relacionada a dimensão diâmetro da cesta; e o grupo 2 à intervenção relacionada a dimensão altura da cesta. O procedimento de fading ou esvanecimento foi idêntico para ambos os grupos que passaram pelo delineamento de linha base múltipla entre participantes. Cada atleta passou por 9 fases de fading, e, em cada uma delas, deveria acertar pelo menos 70% dos arremessos para progredir para a fase seguinte. A fase 1 era realizada com distância próxima da cesta e diâmetro maior (grupo 1) ou altura menor (grupo 2). Progressivamente, a distância era aumentada, passando pela distância intermediária até chegar à distância oficial do lance livre, mantendo-se a mesma especificação da dimensão diâmetro ou altura. Quando o atleta chegava à distância oficial, ele voltava a arremessar de bem próximo da cesta, mas agora com a dimensão diâmetro e altura com especificações médias. Gradualmente, o atleta deveria chegar à distância e dimensão oficiais do basquetebol. A etapa seguimento foi idêntica à etapa de linha de base e tinha como objetivo avaliar se os resultados produzidos na última fase da intervenção se mantinham após a retirada do tratamento. Nos resultados, percebemos que a repetição do ato de arremessar não produziu melhoras no desempenho dos atletas avaliados, no máximo, estabilizou seus resultados. A exposição a diferentes distâncias sem a utilização da progressão através do fading também não produziu melhoras no desempenho destes atletas e o índice de acertos na distância próxima foi maior do que na distância intermediária, que por sua vez foi maior do que na distância oficial, sugerindo que a distância é uma variável crítica quando avaliamos o arremesso. O grupo 1 obteve melhoras durante a intervenção que se mantiveram durante o seguimento e no grupo 2, alguns atletas também obtiveram melhoras durante a intervenção, mas para alguns participantes estes resultados diminuíram no seguimento, sugerindo assim, que a dimensão diâmetro foi mais crítica para estes atletas do que a dimensão altura. O procedimento de fading promoveu melhoras no índice de acertos dos atletas avaliados
Huillca, Palmer Vicente Pulla. "Propriedades superficiais de filmes à base de gelatina". Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/74/74132/tde-08042016-093049/.
Testo completoThe aim of this study was to characterize the surface properties of gelatin-based films. For which, films were produced as following: gelatin plasticized with glycerol (gelatin: 5 g/100 g SFF; glycerol: 30 g/100 g of gelatin), gelatin reinforced with montmorillonite (gelatin: 5 g/100 g SFF; glycerol: 30 g/100 of gelatin; montmorillonite: 5 g/100 g of gelatin), and gelatin plasticized with acetyltributyl citrate (gelatin: 5 g/100 g SFF; acetyltributyl citrate: 50 g/100 of gelatin, soy lecithin: 60 g/100 g acetyltributyl citrate; ethanol: 20 g/100 g SFF). The films were produced by using an automatic film applicator \"Spreading\". Then, the films were tested for determining thickness, humidity and optical property (gloss, color and opacity). Also the microstructure was characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM); in the images obtained by SEM it was applied image analysis using Image J program, to get the value of the fractal dimension (FD). After, the surface properties of contact angle (CA), wettability or spreading coefficient (Cs) and surface free energy (SFE) were characterized by measuring the contact angle by the method of the sessile drop (water: 5 µL, 1-Bromonaphthalene: 3 µL). For the calculation of the ELS, it was also applied the method of Owens-Wendt. These characterizations were made on both sides of the film (air side and plate side). The nature of the G/ATB film influenced the moisture and optical properties, while the films of G and G/MMT showed similar values. With regard to microstructure and roughness, the G film presented a more homogeneous and smooth surface, contrary to that was observed in films of G/MMT, who presented the highest roughness followed by G/ATB film. It was observed that there was a relationship between the roughness values and DF. According to the value of the CA, the three films had a hydrophobic character, because their values were above 65° (on both sides of the film), in the following order: G/MMT > G > G/ATB; the Cs followed the same trend. It should be also mentioned that a significant correlation between the values of CA and the roughness was found. According to the values of CA, Cs and SFE (specifically the polar component), the films of G/ATB had the lowest hydrophobicity, because had lower CA values and higher Cs values, as compared to the other two films. The values of the polar component of the film G/ATB were higher, which explains better the less hydrophobic character of this film. It can be concluded that the gelatin-based films produced in this work have hydrophobic properties (CA>65°), being the film G/MMT which showed better hydrophobic characteristics.
SOARES, Bruna Lúcia de Mendonça. "Desenvolvimento de uma bebida funcional a base de caju (Anacardium occidentale L.) com Lactobacillus casei DN 114-001 livre e microencapsulado". Universidade Federal de Pernambuco, 2016. https://repositorio.ufpe.br/handle/123456789/17621.
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CNPq
O grande interesse e consumo de alimentos contendo probióticos deve-se aos benefícios trazidos à saúde. Entretanto a maioria desses produtos são de origem láctea, resultando num impedimento para o consumo por alguns grupos populacionais, como intolerantes à lactose, alérgicos à proteína do leite e hipercolesterolêmicos, tornando o uso de alimentos de origem vegetal uma prática promissora. A técnica da microencapsulação contribui para aumentar a sobrevivência dos microrganismos por formar uma barreira física contra condições desfavoráveis. Desta forma, o presente estudo tem como objetivo desenvolver uma bebida funcional à base de caju adicionada de Lactobacillus casei, livre ou microencapsulado com matriz alginato de cálcio-quitosana. Microcápsulas foram preparadas pelo método de emulsão/gelificação interna, com o alginato como agente encapsulante e posterior revestimento das esferas com quitosana. As microcápsulas de L. casei foram caracterizadas quanto à morfologia, tamanho das partículas e rendimento de encapsulação. A bebida de caju foi elaborada com 45% de polpa e adição de 10% de açúcar e teve sua composição físico-química e nutricional detalhada. As bebidas controle (sem probióticos), com L. casei livres e com microcápsulas foram armazenadas em refrigeração (4°C) por 4 semanas, análises físico-químicas e microbiológicas foram realizadas nos tempos 0, 7, 14, 21 e 28 dias. Simulações gastrointestinais (SGI) in vitro, no início e final do armazenamento, foram realizadas para avaliar a taxa de sobrevivência das células. Foram realizados testes de aceitabilidade e intenção de compra com o objetivo de obter informações sobre a aceitação do consumidor quanto as três formulações da bebida de caju. Durante SGI, L. casei livre perdeu toda viabilidade, enquanto que células encapsuladas mostraram resistência, reduzindo 1,42 log UFC após simulação gástrica e <1 log UFC ao termino da simulação intestinal. Após 28 dias de estocagem, bebidas contendo microcápsulas e células livres apresentaram 10,2 e 8,1 log UFC/mL, respectivamente. As características físico-químicas mantiveram-se estáveis durante armazenamento e frente bebida controle (sem probióticos). A análise sensorial demonstrou que as bebidas foram aceitas pelos provadores, apesar das microesferas terem sido percebidas. Concluímos que bebida de caju é um substrato favorável para sobrevivência de L. casei livre e microencapsulado por 28 dias e que a microencapsulação é uma técnica promissora para prolongar a viabilidade das células e a sobrevivência em SGI.
The great interest and consumption of probiotic foods is due to the health benefits, however most of these products are of dairy origin, resulting in an impediment to consumption for some population groups, as lactose intolerant, allergic to milk protein and hypercholesterolemic, which makes the use of foods of vegetable origin, for the development of functional products, a promising practice. The microencapsulation technique increases the survival of microorganisms in hostile environments, as the gastric juice, assisting the arrival of a greater number of viable bacteria to the intestine. Thus, this study aims to develop a functional beverage cashew apple added of Lactobacillus casei, free or microencapsulated with matrix calcium alginate-chitosan. The microcapsules are prepared by the emulsification/ internal gelation method, with calcium alginate as encapsulating agents and subsequent coating of the beads with chitosan. The microcapsules produced are characterized for morphology, particle size and encapsulation efficiency. The cashew apple beverage was prepared with 45% pulp and adding 10% sugar and had its physical-chemical and nutritional composition detailed. Beverages control (no probiotics), with L. casei free and with microcapsules were stored in refrigerator (4°C) for 4 weeks, physico-chemical and microbiological analyzes were performed on days 0, 7, 14, 21 and 28 days. Gastrointestinal simulations (SGI), in vitro, at the beginning and end of storage, were performed to evaluate the survival rate of the cells. Acceptability and purchase intent tests were performed in order to obtain information about consumer acceptance as the three formulations of cashew apple beverages. During SGI, L. casei free lost all viability, while encapsulated cells showed resistance, reducing 1.42 log CFU after gastric simulation and <1 CFU log at the end of the intestinal simulation. After 28 days of storage, beverage containing microcapsules and free cells showed 10.2 and 8.1 log CFU / mL, respectively. The physico-chemical characteristics were stable during storage and front control beverage (no probiotics). Sensory analysis showed that the drinks were accepted by the judges, despite the microspheres have been perceived. Conclude that cashew apple beverage is a favorable substrate for L. casei free and microencapsulated survival for 28 days and that microencapsulation is a promising technique to prolong cell viability and survival in SGI.
Barbosa, Alexandre Englert. "O rumo das exportações brasileiras de produtos de base agrícola a partir das negociações da Área de Livre Comércio das Américas (ALCA)". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2001. http://hdl.handle.net/10183/2143.
Testo completoMendonça, Louise Camargo de. "Processo de consentimento : recomendações para os pesquisadores com base nas vivências dos participantes de pesquisa clínica". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/181269.
Testo completoClinical research sponsored in Brazil has been increasing and generating scientific knowledge in several areas of health. The development of these clinical trials involves aspects that go beyond the generation of drugs and more advanced products. The key of clinical research is also in patients who accept to participate in a scientific study. These need to undergo a consent process that involves having knowledge about all aspects that involve their participation in the clinical trial. Within this context, a great challenge arises in the area that is how to carry out the consent process in an appropriate way. It is necessary to take into account aspects such as understanding, motivations, influences, coercion, benefits, risks, among other aspects. The objective of this study was to identify the factors experienced by clinical research participants during the consent process. Questionnaires were applied regarding their perception regarding the participation in clinical research. With the data generated, it was possible to develop a set of recommendations aimed at improving the consent process in clinical research projects.
Blanche, Caroline. "Contribution à l'ingénierie cognitive pour l'évaluation et la conception de systèmes d'information : application au livre électronique et à une base de données d'archive". Lorient, 2010. http://www.theses.fr/2010LORIL173.
Testo completoOur research pertains to the ergonomic perspective of assessment and design of Information Systems via an analytical approach stemming from the work domain. Within this framework, the main goal of this thesis is twofold. Firstly, it aims to show the relevance of a work domain approach to Information Systems assessment and design, whatever kind of system is studied. Secondly, it aims to enrich the analytical approach via work domain, and that at three levels. On a conceptual level, we try to confirm the connection between analysis by domain and ecological psychology, using the affordance concept in its full measure in the method of analysis. At the level of interface assessment in reference to the work domain, we suggest the definition of a new ergonomic principle according to which the Information System interface's active characteristic must correspond to the more or less dynamic nature of the domain to which the interface refers. Finally, at the level of interface design in reference to the work domain, we advocate joining Work Domain Analysis (WDA) and the Three Levels Model (TLM) which help define information-specifying work domain affordances. We applied this methodology to the assessment of the ergonomics of two Information Systems interfaces: an e-book and an archive database. We also proposed elements of functional specification for an Ecological Interface of the archive database
Leal, Cristiane Maria Brasil 1965. "Influência da rugosidade e energia livre de superfície de materiais para próteses removíveis a base de polimetilmetacrilato nas propriedades do biofilme de Candida albicans". [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290519.
Testo completoTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
Made available in DSpace on 2018-08-18T20:42:48Z (GMT). No. of bitstreams: 1 Leal_CristianeMariaBrasil_D.pdf: 1004692 bytes, checksum: 29697b5c7bdbece2ba32ca361de7e805 (MD5) Previous issue date: 2011
Resumo: As propriedades de superfície de resinas e reembasadores a base de polimetilmetacrilato utilizados em próteses dentais removíveis podem interferir na adesão, colonização e formação do biofilme de Candida spp., microrganismo associado à estomatite protética. O objetivo desta pesquisa foi avaliar a influência da rugosidade e da energia livre de superfície de uma resina a base de polimetilmetacrilato e um reembasador rígido na adesão e estrutura de biofilmes de Candida albicans. Discos de resina acrílica termopolimerizável e de reembasador rígido à base de polimetilmetacrilato foram confeccionados nas dimensões de 10 x 2 mm. As diferentes rugosidades de superfície dos espécimes foram obtidas por meio de diferentes acabamento/polimento. A energia livre de superfície variou pela formação de películas de saliva ou plasma ou a combinação de ambos sobre os espécimes. Após a mensuração da rugosidade e da energia livre de superfície, os espécimes foram divididos aleatoriamente de acordo com os grupos experimentais. Biofilmes de Candida albicans ATCC 90028 foram formados sobre as superfícies e avaliados quanto à contagem celular, bioatividade e arquitetura (bio-volume, espessura média e rugosidade média) nas fases de adesão e após 48 horas. Os dados foram analisados utilizando-se a análise de variância a dois critérios seguido do teste de Tukey. O nível de significância foi de p=0,05. Os resultados revelaram que mesmo havendo diferenças significantes (p<0,001) entre os valores da rugosidade, isto não se refletiu nos parâmetros avaliados do biofilme de C. albicans no período de 48 horas. Não houve diferença significativa nos valores da energia livre de superfície, no entanto, a diferença das películas provocou alterações significativas do biofilme de C. albicans na fase de adesão e 48 horas (p>0,05). Pode-se concluir que a alteração da rugosidade de superfície não afeta a estrutura do biofilme de C. albicans de 48 horas, no entanto, a alteração da energia livre de superfície por meio da deposição de proteínas salivares e/ou plasmáticas altera a estrutura do biofilme nas fases de adesão e 48 horas
Abstract: The properties of surface of the resins and reliners base of polymethymethacrylate used in removable dental prosthesis can interfere in the adhesion, colonization and formation of biofilm of Candida spp., microorganism associated to the prosthetic stomatitis. The objective of this research was to evaluate the influence of the roughness and the free energy of surface of the resin the base of polymethymethacrylate and a rigid reliner in the adhesion and structure of biofilms of C. albicans. Discs of the termopolymerized acrylic resin and rigid reliner to the base of polymethymethacrylate had been confectioned in the dimensions 10 x 2 mm. The differents roughness of surface of the specimens were obtained by means of different finishing/polishing. The free energy of surface varied for the formation of pellicle of saliva or serum or the combination of both on the specimens. After the measurement the roughness and the free energy of surface, the specimens were divided randomly in accordance to the experimental groups. Biofilms of Candida albicans ATCC 90028 were formed on the surfaces and evaluated for cell count, bioactivity and architecture (bio-volume, average thickness and average roughness) in the adhesion phases and after 48 hours. The data were analyzed using analysis of variance with two criteria followed by the Tukey test. The significance level was p=0,05. The results showed that even with significant differences (p<0.001) between the values of roughness, it did not reflect in the parameters evaluated of biofilm of C. albicans in 48 hours. There was no significant difference in the values of the free energy of surface; however, the difference of the pellicles caused significant alterations of biofilm of C. albicans in the adhesion phase and 48 hours (p>0,05). It can be concluded that the alteration of the roughness of surface don't affect the structure of biofilm of C. albicans of 48 hours, however, the alteration of the free energy of surface by deposition of salivary and/or serum proteins modifies the structure of biofilm in the adhesion phases and 48 hours
Doutorado
Protese Dental
Doutor em Clínica Odontológica
SANTOS, Adriano Carlos Vieira dos. "Síntese e avaliação da atividade antimicrobiana de 3-aril-2-isoxazolina [5,4-d]pirrolidinas na forma de base livre e de seus sais cloridratos". Universidade Federal de Pernambuco, 2014. https://repositorio.ufpe.br/handle/123456789/11770.
Testo completoMade available in DSpace on 2015-03-10T18:47:31Z (GMT). No. of bitstreams: 2 DISSERTAÇÃO Adriano Carlos Vieira dos Santos.pdf: 4334924 bytes, checksum: fb764c055d3256c9ebc2045d717205ac (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Previous issue date: 2014-05-30
A química medicinal é uma ferramenta importantíssima para o planejamento e o desenvolvimento de moléculas orgânicas, a fim de verificar as possíveis atividades biológicas destas. Dentre as inúmeras classes de compostos orgânicos, tem ganhado muito destaque o núcleo isoxazolínico, especialmente a 2-isoxazolina, devido a sua ampla utilização não só nas áreas cientificas, mas também tecnológica. O núcleo isoxazolínico vem sendo obtido, na grande maioria das vezes, através das reações de cicloadição do tipo 1,3-dipolar. Nestas reações, duas espécies químicas envolvidas, um dipolo e um dipolarófilo, reagem entre si através de seus orbitais de fronteira, HOMO e LUMO, formando-se então o núcleo 2-isoxazolina – heterociclo de cinco membros. No estudo utilizaram-se como dipolarófilos os enecarbamatos endocíclicos de cinco membros 41 e 43, obtidos pelo método da sonicação em um curto intervalo de tempo, e como dipolos os óxidos de nitrila 37 formados a partir da cloração das aril-oximas com NCS. As aril-oximas, por sua vez, foram obtidas a partir dos respectivos benzaldeídos para-substituídos com rendimentos entre 93 e 95%. Obtiveram-se nas reações de cicloadição 1,3-dipolar, realizadas a temperatura ambiente, rendimentos entre 42 e 77%. O cicloaduto 44b, resultante da reação de cicloadição, após sua purificação foi submetido à hidrogenólise em meio ácido, obtendo-se então os cloridratos de isoxazolina aril substituídos 46 com rendimento entre 53 e 64%. Estes, após basificação com solução aquosa de bicarbonato de sódio, foram transformados em suas respectivas aril isoxazolinas na forma de base livre em N6 45, apresentando rendimento quantitativo. Dentre as atividades biológicas relatadas na literatura, inúmeros estudos mostram a 2-isoxazolina como bons agentes anti-inflamatórios, antitumorais, antivirais e com grande destaque para a atividade antimicrobiana, através de testes realizados em bactérias e fungos. Sendo assim, as séries de moléculas obtidas 45 e 46 foram testadas contra bactérias gram positivas e gram negativas através do método de difusão em disco para averiguar a atividade antimicrobiana dos compostos em suas formas de aminas livres e dos seus sais de cloridratos. Neste estudo, observou-se, que boa parte dos compostos testados não exibiu expressivos valores de halos de inibição, quando comparados ao padrão utilizado, ampicilina. Teve destaque o cloridrato de aril isoxazolina p-Cloro 46b que exibiu halo de inibição de 26 mm frente à Mycobacterium smegmatis DAUFPE 71 (álcool ácido resistente), enquanto que a ampicilina apresentou para o mesmo micro-organismo apenas 14 mm de halo de inibição. Já a base livre da aril isoxazolina p-Cloro, o composto 45b, não apresentou inibição para o mesmo micro-organismo. Os demais compostos com maiores valores de halos de inibição foi o 45a frente à Escherichia coli DAUFPE 224 (12,5 mm) e M. smegmatis DAUFPE 71 (14 mm) e os compostos 45b, 46a e 46b que apresentaram halos de 11,5, 13,5 e 13,5 mm, respectivamente, contra Micrococcus luteus DAUFPE 06.
D'hour, Thomas. "Cultes et identités en France au XVIIe siècle : étude des calendriers et des livres liturgiques". Thesis, Clermont-Ferrand 2, 2014. http://www.theses.fr/2014CLF20012/document.
Testo completoUsually, the seventeenth century is considered as a time of romanisation of dioceses liturgy, following the model of Roman works that were reformed at the end of the 16th century by the pope Pie V (Roman breviary is printed in 1568). However, one has to come to the conclusion that each diocese keeps a certain margin especially concerning the conservation of particular uses if they had been in use for two hundred years, as scheduled by the bull Quod a Nobis.This study choses to show the consequences of the Roman reform on the identity and the worship of diocese through the prism of diocesan liturgic calendars and the books that contain them. Foremost, the chosen method consists in entering one hundred and thirty-five calendars, printed between 1570 and 1680 by seventy dioceses, in a data base and questionning them in series.More particularly, the calendars are the object in the early seventeenth century of deep reforms, in their structure as well as in their content. Hence, the Roman calendar and the saints services contained in the Breviary have not been adopted in the same way in all the dioceses of the French relm. It is then possible to build a cartography of the different degrees of adoption of the Roman model and identify spaces. In the same way, every diocese didn't mention as many particular uses as the others, especially in regard to the number of their own saints.Finally, these particular worships can be shared by several dioceses, defining new spaces of devotion to specific saints, on the French scale
Horigoshi, Francis Massashi. "Uso de sensor efeito Hall para medição da vazão de fluidos no processo de produção de palatabilizantes a base de proteína animal em escala piloto". Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/74/74134/tde-28112016-135201/.
Testo completoFlowmeters contribute significantly to the industrial optimization where mass continuous displacement is an integral part of the production system, is therefore crucial for the industry allowing standardize products and automate actions reducing human labor and minimizing errors. This is the case of the production of flavors, substances produced from the enzymatic hydrolysis of animal protein to impart flavor and aroma to food, where there is a continuous mass displacement with fluids dosage triggered in several process steps. They can point out two main steps: a step where dosing occurs alkaline solutions for enzymatic hydrolysis and acidification stage which takes place to ensure the microbiological safety of the product. At work in question was developed and analyzed a turbine flowmeter for sensing via Hall effect to determine the volumetric flow fludos in the production of palatability process. The system used to assess the flow meter was developed on a pilot scale. The meter calibration allowed to calculate the K factor (the ratio meter) for both water where the ratio was 5.5, and for palatability, where the coefficient was calculated 7. From the data obtained by the flowmeter one can observe a high degree of correlation of the data. The flowmeter is made effective for the tested fluids (water and palatability); and with an accuracy of ± 2%, there is shown a viable alternative for the production of flavors process.
Jmal, Aymen. "Représentation des connaissances scientifiques en vue de leur transfert vers l'industrie : Application à la valorisation des produits à base de bois en fin de vie". Phd thesis, Ecole des Mines de Nantes, 2013. http://tel.archives-ouvertes.fr/tel-00857569.
Testo completoPlaza, Carla Aparecida Seno. ""Análise comparativa, pelo método dos elementos finitos bidimensional, das tensões geradas nas estruturas de suporte de prótese parcial removível de extremidade livre inferior, em rebordo horizontal e descendente-ascendente"". Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/23/23137/tde-02032005-173829/.
Testo completoThis study is a two-dimensional finite element analysis (FEA) of the stress distributionin the supporting structures compact and cancellous bone; periodontal ligament and oral mucosa for a distal extension base removable partial denture (RPD) modeled on mandibular dental archs with two residual ridge forms: horizontal and descending-ascending. The two experimental quadrant models were developed in the AUTOCAD 2004 (Autodesk Inc., USA), software to include the first premolar asthe dental support with a distal occlusal rest; the second premolar and first molar as the artificial teeth inserted on the base over an RPD framework and the residual ridge. These models were discretized on the FEA software (I-DEAS, USA) and an axial load of 100 N was applied to the mesh on the artificial teeth cusps either on the first mola r (C1) or on the second premolar (C2). It was noticed that, in the cancellous bone, the maximum strain was around the supporting tooth, mainly in the distalcervical third (0.003 mm) while the largest compression tension (CT) was at the tooth apex when the load was applied over the second premolar, with a horizontal residual ridge (0,621 N/mm 2 ). When the ridge was descending-ascending, the areas affected were the same, showing 0,003 mm and 0,609 N/mm 2 , respectively as the maximum displacement and CT. In the oral mucosa, the largest results occurred when the load application point was over the first molar and the residual ridge was horizontal: 0,137 mm and 0,144 N/mm 2 . The descending-ascending alveolar ridge showed the maximum displacement and CT in the ascending segment of the residual ridge, toward the retromolar trigon, with 0,131 mm and 0,122 N/mm 2 , respectively. Within the constraints of this study, it was concluded that: 1 The compact bone shows greater stress concentration than the cancellous bone; 2 The compact bone shows greater area displacement concentration than the cancellous bone; 3 The descending-ascending residual ridge with the load application on the first molar showed the largest displacement of the oral mucosa when compared to the periodontal ligament displacement with a 10:1 ratio; 4 The descending-ascending residual ridge had a less favourable stress distribution than its horizontal counterpart; 5 The load applied on the first molar produced more distal torquing on the supporting tooth than that on the second premolar.
Camargo, Renato Zanutto Bueno de. ""Análise comparativa pelo método dos elementos finitos bidimensional das tensões geradas nas estruturas de suporte de prótese parcial removível de extremidade livre inferior sobre rebordo residual ascendente distal e descendente distal"". Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/23/23137/tde-06062005-140427/.
Testo completoIn this study, a two-dimensional finite element comparative analysis of the stress distribution and of displacement in the supporting structures oral mucosa,periodontal ligament, compact and cancellous bone was carried out for a distal extension base removable partial denture (RPD), modeled on two mandibular dental archs with different types of residual ridge when aplaying loads of 100N. The A model (MA) was developed to include a distal ascending alveolar ridge with a 15-degrees positive inclination, while the B model (MB) was prepared with a distal descending alveolar ridge with a 15-degrees negative inclination. Both models had a load applied inicially on the lower first molar median cusp (C1) and then on the lower second premolar buccal cusp (C2). Using the FEA software (I-DEAS, USA) for the stress distribution and displacement analysis of the generated images. A comparative analysis was them performed on the C1 and C2 loads for which and both models (MA and MB).The results showed that: 1 The alveolar ridge inclination showed some degree of on the stress distribution and intensity generated by the RPD; 2 The compact bone showed greater stress concentration and intensity than the cancellous bone; 3 The ratio between oral mucosa and periodontal ligament displacement showed greater values when load was applied on the lower first molar for both models. The ratio was higher for the distal ascending alveolar ridge; 4- The compressive stress showed greater intensity and better range of distribution than the tensile stress for both the compact and cancellous bone; 5 The distal ascending residual ridge had a more favourable stress distribution than distal descending conterpart ; 6 The load applied on the lower first molar produced more distal torquing on the supporting tooth than that on the lower second premolar ,specially on the distal descending residual ridge; 7 the load applied on the lower firt molar generated greater amount of stress on the residual ridge supporting structures for both models, but specially for the distal ascending residual ridge; 8 The load applied on the lower second premolar produced more vertical forces on the supporting structures of the tooth for both models.
Chevalier-Royet, Caroline. "Lectures des livres des Rois à l’époque carolingienne". Electronic Thesis or Diss., Paris 4, 2011. http://ezproxy.normandie-univ.fr/login?url=https://www.classiques-garnier.com/numerique-bases/garnier?filename=CacMS01.
Testo completoWithin the short period of a few decades, between 800 and about 840, five exegetical treatises on the books of Kings were composed during the Carolingian Renaissance. Two of them, the one by the pseudo-Jerome and an anonymous unpublished one, which is transmitted by the manuscript Paris, BnF, lat.15 679, are a collection of brief explanations. The three others, written by the well-known exegetes, Claude of Turin, Raban Maur and Angélome of Luxeuil, are long continuous commentaries. These commentators wrote something new, within the exegetical Christian tradition, by assembling the dispersed patristic tradition arranging and updating it in their own words to present a coherent reading of the Books of Kings. A study of the variations and new interpretations given by these treatises allow the historian to have direct hold on the representations underlying the Carolingian debates on the distribution of power, the organization of the earthly society and its links with the heavenly city. These commentaries draw the picture of a well balanced earthly society where the temporal and the religious are not antagonistic towards each other : rectors on earth, kings and clerics, work together to defend the unity of the Church and the unity of faith, and to spread the Biblical message. Nevertheless, the most influential role falls to the prophet who, being a scholar and being able to decipher the holy message, through his words, guides rectors and Christians to salvation
Macedo, Pedro Lopes da Silva [UNESP]. "A preparação para performance de livre improvisação no contrabaixo". Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/141915.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
A improvisação livre, por suas características sui generis, traz ao campo da preparação para performance uma problemática diversa daquela encontrada a partir do seu estudo fundado na música tradicional, idiomática, seu objeto preferencial. Este trabalho investiga os elementos e a eficácia da preparação para a performance do contrabaixo na improvisação livre, visando a um só tempo contribuir para o estudo da preparação para performance musical, como também fornecer subsídios para a preparação e prática da improvisação livre no contrabaixo. A partir de uma revisão bibliográfica sobre os temas da improvisação livre e da preparação para performance, busca-se definir os elementos específicos necessários à preparação para performance da improvisação livre, fazendo uma análise de sua aplicação na preparação para performance musical. Discute-se também as bases conceituais da improvisação livre, buscando uma maior compreensão desta prática. Por fim, sugere-se guias para a prática da improvisação livre no contrabaixo através de estratégias e exercícios, com o intuito de estimular o conhecimento e o uso desta prática entre estudantes e músicos em geral.
Free improvisation, regarding its unique characteristics, brings to the performance field of research a diverse problematic that is found in studies based on the traditional, idiomatic music, its preferential object. This work investigates the elements and efficiency of the free improvisation performance preparation on the double bass, aiming both to contribute to the musical performance study and to provide subsidies to the free improvisation preparation and practice on that instrument. From a literature review on the themes related to the free improvisation and performance preparation, this paper seeks to define the specific elements needed to the free improvisation performance preparation, analyzing its application in musical performance, broad sense. It also discusses the conceptual basis of the free improvisation, in order to enlarge this practice’s comprehension. Guides to the initial approach to free improvisation on the double bass are presented, in order to stimulate the student and general musician to this practice.
Chatzidrossos, Ilias. "P2P Live Video Streaming". Licentiate thesis, KTH, Communication Networks, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12373.
Testo completoThe ever increasing demand for video content directed the focus of researchfrom traditional server-based schemes to peer-to-peer systems for videodelivery. In such systems, video data is delivered to the users by utilizing theresources of the users themselves, leading to a potentially scalable solution.Users connect to each other, forming a p2p overlay network on top of theInternet and exchange the video segments among themselves. The performanceof a p2p system is characterized by its capability to deliver the videocontent to all peers without errors and with the smallest possible delay. Thisconstitutes a challenge since peers dynamically join and leave the overlay andalso contribute different amounts of resources to the system.The contribution of this thesis lies in two areas. The first area is theperformance evaluation of the most prominent p2p streaming architectures.We study the streaming quality in multiple-tree-based systems. We derivemodels to evaluate the stability of a multiple tree overlay in dynamic scenariosand the efficiency of the data distribution over the multiple trees. Then, westudy the data propagation in mesh-based overlays. We develop a generalframework for the evaluation of forwarding algorithms in such overlays anduse this framework to evaluate the performance of four different algorithms.The second area of the thesis is a study of streaming in heterogeneous p2poverlays. The streaming quality depends on the aggregate resources that peerscontribute to the system: low average contribution leads to low streamingquality. Therefore, maintaining high streaming quality requires mechanismsthat either prohibit non-contributing peers or encourage contribution. In thisthesis we investigate both approaches. For the former, we derive a model tocapture the evolution of available capacity in an overlay and propose simpleadmission control mechanisms to avoid capacity drainage. For the latter, inour last work, we propose a novel incentive mechanism that maximizes thestreaming quality in an overlay by encouraging highly contributing peers tooffer more of their resources.
QC 20100506
Willcock, Ian. "Multimedia and live performance". Thesis, De Montfort University, 2012. http://hdl.handle.net/2086/7988.
Testo completoTveite, Tor. "The case of the object in Livonian : a corpus based study /". Helsinki : [Helsingin yliopisto], 2004. http://catalogue.bnf.fr/ark:/12148/cb399860724.
Testo completoGimeno, Martín Saturnino. "Bases para el diseño curricular del tiempo libre". Doctoral thesis, Universitat Rovira i Virgili, 1996. http://hdl.handle.net/10803/8944.
Testo completoGimeno, Martin Saturnino. "Bases para el diseño curricular del tiempo libre". Universitat Rovira i Virgili, 1996. http://www.tesisenxarxa.net.
Testo completoKarlsson, Martin, e David Pedersen. "Live-Chat Module for Web-based Systems". Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-26462.
Testo completoSingh, Ravinder Pal. "Efficient protocol for live Web-based teaching". [Gainesville, Fla.] : University of Florida, 2002. http://purl.fcla.edu/fcla/etd/UFE1000163.
Testo completoTitle from title page of source document. Document formatted into pages; contains xi, 74 p.; also contains graphics. Includes vita. Includes bibliographical references.
Turcatto, Rosemari Barden. "Vibrações livres e forçadas no modelo de Timoshenko". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2002. http://hdl.handle.net/10183/2681.
Testo completoSuginoshita, Yoshiki. "Liver targeting of IFN-β with a liver-affinity polysaccharide based on metal coordination in mice". Kyoto University, 2002. http://hdl.handle.net/2433/149742.
Testo completoBobulescu, Roxana. "Avantage comparatif, rendements et protectionnisme : l'"argument de Graham"". Grenoble 2, 2001. https://www.classiques-garnier.com/numerique-bases/index.php?module=App&action=FrameMain&colname=ColGarnier&filename=RbcMS01.
Testo completoFukushima, Shu. "The frequency of 4977 base pair deletion of mitochondrial DNA in various types of liver disease and in normal liver". Kyoto University, 1998. http://hdl.handle.net/2433/182247.
Testo completoLopes, Ilza Leite. "Análise do uso das linguagens controlada e livre nas estratégias de busca em bases de dados". reponame:Repositório Institucional da UnB, 2000. http://repositorio.unb.br/handle/10482/30528.
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Esta pesquisa teve como objetivo principal o estudo sobre o planejamento da estratégia de busca num ambiente de bases de dados de acesso em CD-ROM, proporcionando uma perspectiva sobre a complexidade para a busca da informação conceituai, incluindo a seleção de termos para as estratégias e a função do vocabulário controlado ou da linguagem natural nesse contexto. Estudou, ainda, o processo de entrevista inicial para atendimento à demanda de informação e sua interferência no planejamento da estratégia de busca, além de descrever as etapas do planejamento da mesma e os critérios para seleção de bancos e/ou de bases de dados. Pretendeu-se estudar os fatores que compõem o planejamento da estratégia de busca, analisando-se a influência do uso do vocabulário natural e do controlado na formulação da estratégia, objetivando identificar qual das linguagens obteria o melhor desempenho. Para a análise do uso da linguagem controlada na base de dados Psychological Abstracts Literature (PSYCLIT), foram utilizados os conceitos em campos de registros de dados específicos e, comparativamente, para a análise da linguagem natural na estratégia, foram usados conceitos livres nos campos exclusivos onde ocorrem esses termos. Numa avaliação dos resultados os usuários identificaram os melhores itens recuperados em função da precisão obtida, fornecendo portanto, os elementos primordiais para avaliação dos termos que proporcionaram os resultados mais satisfatórios.
The principal purpose of this study is the planning of the search strategy in the CD-ROM database environment providing a perspective on the complexity of searching for conceptual information, including the selection of terms to the search strategies and the role of vocabulary control or the free-text in this context Describes also, the process of the preliminar interview in order to observe its interference on the planning of the search strategy, describing the steps in the planning of the strategies and the criterias for the selection of the information retrieval systems and the databases. The goal is intend to study the factors that participate on the composition of the search strategy, analysing the influences on the use of the controlled vocabulary in the planning of the strategy, and trying to identificate which language has the better performance. In order to evaluate the possibility to use controlled language in the Psychological Abstracts Literature (PSYCUT) database, were used the concepts which were registred on specific search fields, and comparatively, for the analysis of the natural language terms that were used in the search strategy, the free concepts in the search fields where these terms occured. The users had identificate on an process of evaluation of the results, which language had offfered the better results, giving yours opinions about the process of these evaluation.
Crespin, Benoît. "Modélisation et déformation de forme libre à base de surfaces implicites équipotentielles". Bordeaux 1, 1998. http://www.theses.fr/1998BOR10648.
Testo completoCruz, Kellyane Correia da. "Avaliação de suplementos nutricionais à base de proteína hidrolisada e aminoácidos livres". Universidade Federal de Pernambuco, 2013. https://repositorio.ufpe.br/handle/123456789/12681.
Testo completoMade available in DSpace on 2015-03-18T14:06:39Z (GMT). No. of bitstreams: 2 DISSERTAÇÃO KELLYANE da CRUZ.pdf: 891441 bytes, checksum: 77667e280aae2c996010889f779323bd (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Previous issue date: 2013-08-15
A hidrólise proteica e a síntese de aminoácidos livres podem refletir do ponto de vista nutricional, a melhoria de parâmetros como: Digestibilidade e utilização proteica. Dentre os vários tipos de produtos, os suplementos alimentares surgem como um mercado em constante ascensão e de fácil acesso pela população, mesmo quando possuem indicações restritas de uso. O presente trabalho se propôs a avaliar a qualidade proteica de suplemento alimentar destinado a atletas, quanto ao teor de proteínas totais e grau de hidrólise. Foram selecionados produtos de elevada concentração proteica, tais como: hidrolisados do soro do leite, aminoácidos de cadeia ramificada, glutamina e creatina. Os produtos foram analisados a partir de três diferentes métodos de quantificação de proteína total: Biureto, Kjeldahl e Análise alimentar através da aplicação de equação preditiva sugerida por Kumae. As frações peptídicas dos hidrolisados foram analisadas através da precipitação com ácido tricloroacético e tungstato de sódio, e também por espectroscopia de massas. Conforme análises química e elementar foram encontradas inadequações significativas entre quantidade proteica declarada no rótulo em 20% destes produtos. Foi observada forte correlação (r>0,83) entre os métodos de quantificação de nitrogênio total: Kjeldahl e Análise elementar; e fraca correlação (r<0,33) destes com o método colorimétrico Biureto. A precipitação diferencial com ácidos representa uma alternativa para a caracterização de frações peptídicas de hidrolisados proteicos, sendo necessárias adaptações metodológicas para atender às características destes produtos. Os suplementos nutricionais necessitam de maior monitoramento e controle de qualidade para sua comercialização.
Zhang, Dexin. "Personal identification based on live iris image analysis". Thesis, University of Bath, 2006. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.442694.
Testo completoHartmann, Andreas. "Interpolation libre et opérateurs de Toeplitz". Habilitation à diriger des recherches, Université Sciences et Technologies - Bordeaux I, 2005. http://tel.archives-ouvertes.fr/tel-00281652.
Testo completo1) Interpolation simple : interpolation des valeurs en des points ;
2) Interpolation généralisée : p.ex. interpolation des dérivées, interpolation sur des points proches, interpolation tangentielle, etc. ;
3) Interpolation classique : l'interpolation est définie à partir d'un espace des traces déterminé a priori ;
4) Interpolation libre : l'interpolation est définie à partir d'une propriété de la trace (à savoir d'être un idéal d'ordre) ;
5) Interpolation libre et fonctions extrémales : caractérisation de l'interpolation en termes de fonctions extrémales ;
6) Interpolation libre et opérateurs de Toeplitz.
Le dernier point nous éloignera un peu des problèmes d'interpolation. Même s'il existe un lien étroit entre les problèmes d'interpolation libre (en particulier dans les espaces de type Paley-Wiener ou plus généralement les espaces modèles, voir Section 4.1), nous allons nous intéresser de plus près à certaines propriétés des opérateurs de Toeplitz qui se révèlent importantes dans le contexte de l'interpolation. Cependant, notre étude sera menée détachée du contexte de l'interpolation. Ce sera l'occasion de rencontrer à nouveau des fonctions extrémales. Nous allons en effet étudier les fonctions extrémales des noyaux d'opérateurs de Toeplitz (supposés non triviaux). Celles-ci s'avèrent posséder beaucoup de propriétés intéressantes.
Une remarque concernant les techniques utilisées. Les problèmes d'interpolation étant abordés dans des situations très variées (espaces de Hilbert et de Banach comme par exemple Bergman et Hardy, algèbres de Fréchet, et même des espaces vectoriels qui ne sont pas topologiques ; interpolation classique, libre et généralisée) nécessitent des méthodes très difféerentes. Par ailleurs, les problèmes connexes sont motivés par des problèmes d'interpolation mais ils sont considérés dans un contexte déconnecté de l'interpolation. Nous verrons ainsi de l'analyse complexe classique (espaces de Hardy, factorisation de Riesz-Nevanlinna, mesures de Carleson, majorantes harmoniques) et harmonique (toujours présente dans le contexte de l'interpolation et du sampling), de la géométrie des espaces de Banach (bases, bases inconditionnelles, espaces d'interpolation, indices de Boyd), de l'analyse fonctionnelle (principes variationnels, certains aspects topologiques) et convexe (Lemme de Minkowski-Farkas) en passant par la théorie des opérateurs (Théorème du relèvement du commutant, sous-espaces invariants), ainsi que de l'analyse complexe d'une et plusieurs variables (méthodes du d-bar) jusqu'aux espaces de de Branges-Rovnyak.
Desgranges, Olivier. "Le livre et l'écrit dans les villes-arsenal de la Marine française (XVIIe-XIXe siècles) : l'exemple de Rochefort". Thesis, Paris, Ecole nationale des chartes, 2018. http://www.theses.fr/2018ENCP0002.
Testo completoThis study aims to register all the publications of its author within the framework of a history of Rochefort, city-arsenal of the French Navy, apprehended under the angle of the history of the powers of writing. The chronological frame corresponds to that of Rochefort arsenal activity (1666-1927). The specific identification of these powers gives rise to comparisons with other cities-arsenal. It begins with an analysis of the functions of writing in the administration of the Dockyard and the study of the activity of booksellers and printers. An important place is also made for the writing and reading practices of scientists working in the cities-arsenal, through the example of the Navy physician Pierre-Adolphe Lesson. Finally, the question of the appropriation of the book and the colonial writing is tackled by posing the recent historiographical problems related to the study of the book in colonial context
Calado, Ricardo Bigio 1970. "A preparação da performance do contrabaixo acústico e Live Electronics /". São Paulo, 2017. http://hdl.handle.net/11449/151590.
Testo completoBanca: Luciano de Souza Zanatta
Banca: Alexandre Silva Rosa
Resumo: Este trabalho discute a preparação para a performance do contrabaixo numa relação com dispositivos computacionais de interação em tempo real, dentro de vertentes conhecidas como Live Electronics e Live Looping. Para tal discussão foi utilizado o programa Ableton Live, desenvolvido na Alemanha em 1999, que atualmente constitui ferramenta de produção musical amplamente utilizada em performances ao vivo e em estúdio. O objetivo geral deste trabalho é discutir possibilidades de utilização do programa Ableton Live como ferramenta na preparação e realização da performance ao contrabaixo bem como a interação entre o músico e o computador, de forma a propor estratégias de preparação da performance do contrabaixo com Live Electronics e Live Looping. A discussão enfatiza o papel do performer, bem como aspectos relacionados à performance musical do contrabaixo acústico neste contexto. O trabalho está organizado em 4 partes principais: 1) Revisão da Literatura sobre questões organizacionais, técnico-interpretativas; aspectos psicológicos, abordagens sobre a musicalidade e expressividade; conceitos de Hiperinstrumento, técnica estendida e a relação compositor-intérprete; 2) Apresentação dos objetos de estudo - recursos de execução do contrabaixo na contemporaneidade; breve histórico sobre Live Electronics e aspectos básicos de funcionamento do programa utilizado; 3) um relato de experiência sobre a preparação de um recital de contrabaixo e piano que utilizou o sistema computacional como ... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: This paper discusses the preparation for a contrabass performance related to real-time interaction computing devices, within known strands like Live Electronics and Live Looping. The software chosen to work was Ableton Live, developed in Germany in 1999, widely used for music production and live performances and in studio. The general objective of this work is to discuss possibilities of using the Ableton Live program as a tool in the preparation and performance of the double bass as well as an interaction between the musician and the computer, to propose a strategy for the preparation of double bass performance with Live Electronics and Live Looping. The discussion emphasizes the role of the performer as well as related to the musical performance of the acoustic bass in context. The work is organized in 4 main parts: 1) Literature review on normative issues, technical-interpretative, psychological questions and approaches on musicality and expressivity; on concepts of Hyper instrument, extended technique and the relation composer-interpreter; 2) Presentation of the objects of study - resources of execution of the contrabass in the contemporaneity; Brief history on live electronics and basic program operating features; 3) an experience report on the preparation of a double bass and piano recital that uses the computer system as a fundamental part of the performance preparation strategy; 4) The process of preparation for a performance, the relationship between composer and p... (Complete abstract click electronic access below)
Mestre
Habib, Shahid, Khalid Khan, Chiu-Hsieh Hsu, Edward Meister, Abbas Rana e Thomas Boyer. "Differential Simultaneous Liver and Kidney Transplant Benefit Based on Severity of Liver Damage at the Time of Transplantation". ELMER PRESS INC, 2017. http://hdl.handle.net/10150/625529.
Testo completoLivne, Michelle [Verfasser]. "Imaging-based predictive modeling in acute ischemic stroke / Michelle Livne". Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2019. http://d-nb.info/117977891X/34.
Testo completoYu, Bo. "Oligonucleotide Based Liposomal Nanoparticles for Leukemia and Liver Cancer Therapy". The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1275490450.
Testo completoEgito, Santiago Ramos Cristiano. "Literatura e jornalismo: bases teóricas para análise do livro-reportagem". Universidade Federal de Pernambuco, 2010. https://repositorio.ufpe.br/handle/123456789/7686.
Testo completoReflexão sobre os pressupostos teóricos nas relações entre literatura e jornalismo; mais especificamente, nas aproximações e divergências entre o romance e o livro-reportagem. Dissertação que sugere e prepara futuras análises práticas, a partir da delimitação de referenciais, da apresentação de tópicos polêmicos e fundamentais ao debate, como a validade das classificações de gênero, os princípios éticos e técnicos do ofício jornalístico, o estatuto ficcional, a teoria do romance e as características da prosa contemporânea
González, Fernando Jaime. "Bases sociais das disposições para o envolvimento em práticas de movimento corporal no tempo livre". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/29680.
Testo completoBody movement practices during spare time (BMPST) form part of the cultural manifestation of different sectors of society. As in other cultural practices, BMPST may vary in terms of type, creation, production and meaning, according to the social and historical context in which they occur. Despite these variations, BMPST have always played a significant role in society; different social groups have been creating, preserving, transmitting and transforming them in their dynamic and different forms over the years. Social and cultural studies have been involved in this phenomenon, by attempting to elucidate what could be the exact role of BMPST in the cultural field and to reveal, among other aspects, how personal connections are created and how ideas on such practices are formed. With this in mind, the aim of the present study was to develop an understanding of social and cultural aspects implicated in individuals‟ motivation towards BMPST. In particular, we inquired whether a correlation could be established between the motivation of individuals towards BMPST and their position/biographic trajectory in society. Analytically, we looked for support in works developed by Pierre Bourdieu and Bernard Lahire. Bordieu‟s theories gave rise to the study of social distribution of BMPST in society, whilst Lahire‟s lead to the updated analysis of motivation for BMPST and to the interpretation of their structure. This investigation consisted of three steps: each addressed specific aims which, when taken together, combined to yield answers to the postulated research questions. The first step described the distribution and involvement of Porto Alegre inhabitants in BMPST, according to their position in society (subjects aged between 25 and 65, in paid employment), based on broad class structure. For this, a survey questionnaire was drawn up (n 1.090). In the second step, specific aims were to analyze the involvement of subjects with different cultural interests in BMPST and to acknowledge possible associations between updated motivations towards BMPST and towards other fields in the subjects‟ social life. Two methodological procedures were developed to achieve this. The first was based on a specific survey about cultural practices among Porto Alegre inhabitants, using a questionnaire with stratified sampling and unequal sampling fractions (n 486): a) convergence/divergence of subjects‟ cultural interests and their relation with the social position that they occupy; and b) the correlation between consonance/dissonance degrees of subjects‟ cultural practices in the samples analyzed, and their involvement with BMPST. The second methodological procedure aimed to understand the significance attributed to BMPST by subjects of different social position and with different social interests, and the possible association between these factors and cultural practices in the universe of aesthetics and sociability. This part of the study involved the analysis of selected cases. Six cases were analyzed in association with another 17. Subjects that took part on this study were chosen from the sample used in the second step, considering the combination of class and gender structure and the involvement of convergent or divergent BMPST with statistical tendencies of the social reference group. The third and final step of this research aimed to understand the association between an individual‟s particular social class features and their biographical trajectory, on the creation of their motivation and involvement in BMPST. Methodologically, in this stage of the study, two sociological portraits of cases were chosen from the previous step, based on motivation of subjects towards convergence/divergence criteria and tendencies recognized in the social location to which they belong, and consonance/dissonance in their social practices. The procedures developed allow us to state that: a) Social class profoundly influences one individual‟s involvement with BMPST; less intensely, it also influences the kind of practice performed – gender is more relevant in this respect; b) Income is strongly associated to individuals‟ involvement with BMPST and there is also an association between the frequency of physical exercise/sports and a lower significant involvement in domestic work; c) Convergence (legitimate and less legitimate) and dissonance of cultural interests are not consistently associated with the kind of BMPST and the significance to them attributed; d) Subjects belonging to the same social location and with similar cultural profiles can understand the same BMPST in different ways; e) the practice of physical exercise amongst women from the more prevalent classes is more often a consequence of existing body problems than due to prevention practices or leisure; f) Among women from higher social classes, BMPST is most commonly associated with leisure and avoiding situations prejudicial to health; g) Among men, independently of their social class, BMPST are usually related to leisure and most commonly involved with therapeutic/repairing and not so much with preventive/conservative practices, although the latter may appear among individuals of higher social classes; h) Among men and women, practicing physical exercise is associated with broader body concerns (aesthetics, healthier diet), contrasting with what usually happens in sporting practice; i) Motivations implicated in physical practices diverge from common cultural practices of the subjects; j) Motivation to BMPST are based on subjects‟ sociability, and limited by their objective life conditions; and k) BMPST seem to have a smaller distinctive weight when compared with other cultural practices (music, for example) and, in particular, do not possess a potential for breaking down class differences.
Las Prácticas de Movimiento Corporal en el Tiempo Libre (PMCTL)forman parte de las manifestaciones culturales de los más diferentes grupos sociales. Como prácticas culturales, las PMCTL refieren a diferentes condiciones de producción , actores, significados y función, de acuerdo con las transformaciones de los contextos socio-históricos en los cuales ellas se insertan. Independientemente de esas características, un aspecto que parece no dejar dudas es que las PMCTL ocupan un espacio social relevante, ya que la mayoría de los grupos sociales, con sus diferentes formas y dinámicas, las han creado, conservado, transmitido y transformado. Los estudios socioculturales se han ocupado de este fenómeno, buscando entender el papel que las PMCTL pueden desempeñar en el campo cultural, como también develar, entre otros aspectos, de qué manera los sujetos establecen vínculos y construyen significados sobre tales prácticas. Teniendo como referencia ese campo teórico, esta investigación busca comprender los aspectos socioculturales que subyacen a la participación de los sujetos en las PMCTL. Más precisamente, preguntarse: ¿cuáles son las relaciones entre las disposiciones de los sujetos para participar de PMCTL y su localización y trayectoria biográfica en el espacio social? Analíticamente, esta tesis procura sustentación en los trabajos de Pierre Bourdieu y Bernard Lahire. El primer autor orienta el estudio de la distribución social de las PMCTL en el espacio social, mientras el segundo, promueve el análisis de las disposiciones actualizadas en las PMCTL y en la interpretación de su constitución. La investigación consta de tres etapas, cada una orientada por objetivos específicos que, conjugados, procuran auxiliar en la construcción de las respuestas para el problema de investigación. En la primera etapa, se describe la participación en PMCTL de los habitantes de la Ciudad de Porto Alegre - Brasil, conforme a la posición de los sujetos (entre 25 y 65 años, con actividad principal remunerada) en el espacio social, establecida con base en la macroposición de clase. Para esto, fue desarrollada una investigación survey por cuestionario (n 1090). En la segunda etapa , los objetivos específicos tuvieron como propósito analizar las características de la participación en PMCTL de sujetos con perfiles diferentes de consumos culturales, y también conocer las posibles relaciones entre las disposiciones actualizadas en el universo de las PMCTL y las subyacentes en otras esferas de la vida social. Con este propósito, fueron desarrollados dos procedimientos metodológicos. El Primero, en base a un relevamiento específico sobre las prácticas culturales de los habitantes de Porto Alegre, a través de una investigación survey por entrevista con una muestra por cuota, con ponderación no-proporcional (n 486),donde se investigó: a) la convergencia/divergencia de los consumos culturales de los sujetos y el vínculo con el espacio social ocupado; y b) la relación entre el grado de consonancia/disonancia de legitimidad de las prácticas culturales de los sujetos de la muestra y la participación en PMCTL. El segundo procedimiento metodológico tuvo por objetivo conocer el significado atribuido a la participación en PMCTL por sujetos localizados en espacios sociales distantes, con perfiles de consumos culturales diferentes, y los posibles vínculos de esos significados con prácticas culturales relacionadas al cuidado del cuerpo y de la sociabilidad. Este momento de la tesis consistió en un estudio de casos seleccionados. Fueron descritos en la investigación seis casos, analizados comparativamente? con otros 17. Los sujetos que participaron fueron elegidos a partir de la muestra de la segunda etapa, considerando la combinación de macroposición de clase, género y participación en PMCTL convergentes y divergentes con las tendencias estadísticas del grupo social de referencia. Finalmente, en la tercer etapa de la investigación, se procuró comprender la combinación de los factores específicos de la clase social a la cual el sujeto pertenece (y/o perteneció) y su trayectoria biográfica en dicho universo, en la constitución de sus disposiciones y en la relación de éstas con la participación en PMCTL. Metodológicamente, en esta fase del estudio, se confeccionaron dos retratos sociológicos de casos elegidos de la etapa anterior pertenecientes al mismo espacio social, más participantes de PMCTL diferentes (convergentes e divergentes con las tendencias identificadas en el espacio social a que pertenecen). El conjunto de los procedimientos desarrollados en las tres etapas de la investigación? permite afirmar que: a) La clase social condiciona marcadamente la participación en PMCTL y, en menor medida, también el tipo de práctica realizada – el género es más determinante en ese aspecto; b) La renta aparece fuertemente asociada con la participación en PMCTL, también hay una asociación entre la mayor práctica de ejercicios físicos y deportes y la menor participación en el trabajo doméstico; c) La consonancia (legítima y poco legítima) y la disonancia de consumos culturales parecen no estar asociados de forma consistente con el tipo de PMCTL y el significado atribuido a estas; d) Sujetos localizados en un mismo espacio social y con perfiles culturales similares pueden significar las mismas PMCTL de formas diferentes; e) La práctica de ejercicios físicos entre mujeres de clase popular parece estar más directamente asociada a la intervención sobre problemas manifiestos que a prácticas preventivas y/o de ocio; f) Entre las mujeres de las clases sociales más altas, hay mayor probabilidad de la práctica asumir un carácter preventivo y de ocio; g) Entre los hombres, independientemente de la clase, la participación en PMCTL tiende a ser orientada por el ocio (e identificación) y por prácticas más terapéuticas/reparadoras que preventivas/conservativas, aunque sea más probable que asuma este carácter entre sujetos de clase más alta; h) La práctica en ejercicios físicos, tanto en hombres como en mujeres, se vincula con disposiciones de cuidado del cuerpo más amplias (alimentación, estética), lo que no ocurre con la práctica de deportes; i) Las disposiciones que subyacen a las prácticas corporales no son comunes al conjunto de las prácticas culturales de los sujetos; j) Las disposiciones para la participación en PMCTL son construidas en las relaciones de socialización de los sujetos, restringidas por las condiciones objetivas de vida; y k) Las PMCTL parecen tener un peso distintivo mucho menor que otras prácticas culturales (música, por ejemplo) y, particularmente, no cargan un potencial desclasificador en su práctica, posiblemente en la forma o en el contexto de la práctica.
Tomalik, Edyta. "Image-based Microscale Particle Velocimetry in Live Cell Microscopy". Thesis, Blekinge Tekniska Högskola, Institutionen för programvaruteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-2564.
Testo completoAlizadeh, Noghani Kyoomars. "Towards Seamless Live Migration in SDN-Based Data Centers". Licentiate thesis, Karlstads universitet, Institutionen för matematik och datavetenskap (from 2013), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-70166.
Testo completoLive migration of Virtual Machines (VMs) has significantly improved the flexibility of modern Data Centers (DCs). Ideally, live migration ought to be seamless which requires a comprehensive support from the underlying network. However, legacy DC networks fall short to address the challenges of migration due to their inflexible and decentralized characteristics. In contrast, Software Defined Networking (SDN) is a new networking paradigm, which has the potential to improve the live migration thanks to its comprehensive view over the network, flexible structure, and its close integration with DC management infrastructures. This thesis investigates networking challenges of short and long-haul live VM migration in SDN-based DCs. We propose solutions to make the intra- and inter-DC live migration procedures more seamless. Furthermore, our proposed SDN-based framework for inter-DC migration improves the management, enhances the performance, and increases the scalability of interconnections among DCs.
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