Joomla! ist eines der beliebtesten Open Source Web Content Management Systeme. Seine Popularität verdankt das System vor allem den vielfältigen Möglichkeiten zur Anpassung der Applikation an die individuellen Bedürfnisse der Nutzer unter Anwendung zahlreicher Erweiterungen. Mit Einführung der Version 1.5 wurde jedoch ein nahezu vollständig überarbeitetes System veröffentlicht, welches nunmehr einen durchgehend objektorientierten Ansatz verfolgt und Erweiterungen entsprechend der Model-View-Controller Architektur umsetzt. Dies hat zur Folge, dass eine Vielzahl bereits bestehender Erweiterungen nicht mit Joomla! 1.5 kompatibel sind. So auch die Newsletter-Komponente MkPostman 1.6 Beta des Chemnitzer Unternehmens „das Medienkombinat“. Die Firma stellte daher die Aufgabe, die Erweiterung im Rahmen einer Masterarbeit auf Basis des bestehenden Newsletter-Systems an das neue Joomla!-Framework anzupassen. Das Hauptaugenmerk lag dabei auf der Implementierung der überarbeiteten Erweiterung. Die vorliegende Ausarbeitung erläutert jedoch weniger die technischen Details dieser Umsetzung, sondern stellt die theoretischen Überlegungen und damit den Hintergrund der Entstehung des neuen Newsletter-Systems in den Mittelpunkt. So versucht sie zunächst ein Verständnis für das Potential, aber auch die Anforderungen eines Newsletter-System aufzubauen, indem wichtige ökonomische, rechtliche und technische Aspekte betrachtet werden. Im Zuge dessen wird näher auf den Begriff des Newsletters eingegangen. Weiterhin ist eine kurze Einführung in das Gebiet des Content Managements essentiell, um aufzuzeigen, worin dessen Idee liegt und wie diese mit Hilfe von Software umgesetzt werden kann. Dabei werden nicht nur der allgemeine Aufbau und die Funktionalitäten eines Content Management Systems genauer in Augenschein genommen, sondern vor allem das Open Source Web Content Management System Joomla! kurz vorgestellt. Um eine genauere Vorstellung davon zu bekommen, welche Mindestanforderungen an die neu zu entwickelnde Newsletter-Anwendung gestellt werden, folgt eine Untersuchung der aktuellen Komponente MkPostman 1.6 Beta hinsichtlich ihres Funktionsumfangs und ihrer Beschaffenheit. Ferner werden die Ergebnisse einer Beurteilung der Gebrauchstauglichkeit des Systems aus Sicht der derzeitigen Anwender präsentiert und die Erfordernisse der Nutzer an die neu zu entwickelnde Erweiterung ermittelt. Basierend auf den bis dahin getätigten Erkenntnissen erfolgt schließlich die Konzeption des neuen Newsletter-Systems, welches sowohl bereits bestehende als auch neue Elemente integriert. Dabei werden in erster Linie der anvisierte Aufbau sowie einige wichtige Funktionalitäten dargestellt. Schlussendlich wird kurz erläutert, wie die geplanten Grundfunktionen umgesetzt wurden und welche Möglichkeiten sich im Zuge einer Weiterentwicklung des entstandenen Systems ergaben. [aktuellere Metadaten]

Don Juan Manuel’s laudatory portrayal of Saladin, the Muslim Sultan of Babylon, in Exempla 25 and 50 of El Conde Lucanor presents an interesting paradox, particularly when considering that the fourteenth-century text was intended as moral instruction for a Christian audience. This report addresses this paradox by determining Saladin’s placement within Juan Manuel’s moral and spiritual philosophy through textual and comparative character analyses. The first section applies Victor Turner’s social drama theory in a textual analysis of Exempla 25 and 50 to establish Juan Manuel’s representation of Saladin as a triumphant figure, capable of meeting and overcoming challenges to his honor and virtue. The second section applies M. M. Bakhtin’s concept of dialogism to engage in a closer examination of Saladin’s “voice” in relation to other characters of Juan Manuel’s exempla for the purpose of revealing the ambiguities and finer intricacies of Saladin’s character. These analyses serve to raise and address paradoxical questions relating to Juan Manuel’s presentation of Saladin as both a Muslim adversary and friend of Christendom. / text

Shear strength of precast/prestressed hollow-core (PHC) slabs subjected to concentrated or line loads, especially near supports, may be critical and usually is the governing criteria in the design. This study presents the second phase of a research program, undergoing at the University of Manitoba, to calibrate the shear equations in the Canadian code for predicting the shear capacity of PHC slabs. This phase includes both experimental and numerical investigations using a finite element analysis (FEA) software package. The length of bearing, void shape and size, level of prestressing and shear span-to-depth ratio were investigated. The experimental results were compared to the predictions of the Canadian, American and European codes. It was concluded that the Canadian code is unduly conservative. However, the special European code for PHC slabs resulted in better and more consistent predictions. The FEA suggested that the adequate prestressing reinforcement ratio to obtain highest shear capacity ranges between 0.7% and 1.1%.

Shear strength of precast/prestressed hollow-core (PHC) slabs subjected to concentrated or line loads, especially near supports, may be critical and usually is the governing criteria in the design. This study presents the second phase of a research program, undergoing at the University of Manitoba, to calibrate the shear equations in the Canadian code for predicting the shear capacity of PHC slabs. This phase includes both experimental and numerical investigations using a finite element analysis (FEA) software package. The length of bearing, void shape and size, level of prestressing and shear span-to-depth ratio were investigated. The experimental results were compared to the predictions of the Canadian, American and European codes. It was concluded that the Canadian code is unduly conservative. However, the special European code for PHC slabs resulted in better and more consistent predictions. The FEA suggested that the adequate prestressing reinforcement ratio to obtain highest shear capacity ranges between 0.7% and 1.1%.

Made available in DSpace on 2014-12-17T15:47:49Z (GMT). No. of bitstreams: 1 IsanioLAS.pdf: 1324306 bytes, checksum: 06b1bb191919f02b1e6524146d71c0d3 (MD5) Previous issue date: 2008-11-10 / Ubiquitous computing systems operate in environments where the available resources significantly change during the system operation, thus requiring adaptive and context aware mechanisms to sense changes in the environment and adapt to new execution contexts. Motivated by this requirement, a framework for developing and executing adaptive context aware applications is proposed. The PACCA framework employs aspect-oriented techniques to modularize the adaptive behavior and to keep apart the application logic from this behavior. PACCA uses abstract aspect concept to provide flexibility by addition of new adaptive concerns that extend the abstract aspect. Furthermore, PACCA has a default aspect model that considers habitual adaptive concerns in ubiquitous applications. It exploits the synergy between aspect-orientation and dynamic composition to achieve context-aware adaptation, guided by predefined policies and aim to allow software modules on demand load making possible better use of mobile devices and yours limited resources. A Development Process for the ubiquitous applications conception is also proposed and presents a set of activities that guide adaptive context-aware developer. Finally, a quantitative study evaluates the approach based on aspects and dynamic composition for the construction of ubiquitous applications based in metrics / Aplica??es para a computa??o ub?qua operam em ambientes onde a disponibilidade de recursos muda significativamente durante a sua opera??o. Tal caracter?stica demanda que aplica??es sejam adaptativas e cientes do seu contexto de execu??o. Visando atender esses requisitos, ? proposto o PACCA (Projeto de Aplica??es Ciente ao Contexto e Adaptativas), um arcabou?o para desenvolvimento e execu??o de aplica??es adaptativas cientes de contexto. O paradigma de orienta??o a aspectos ? usado no PACCA para modularizar o comportamento adaptativo e dissoci?-lo da l?gica da aplica??o. Para prover maior flexibilidade o PACCA utiliza o conceito de aspecto abstrato para permitir a extens?o e adi??o de novos interesses adaptativos, al?m de um modelo de aspectos default que contempla interesses adaptativos comuns a grande parte das aplica??es ub?quas. A orienta??o a aspectos aliada ? composi??o din?mica de software oferece suporte para adapta??o ciente ao contexto, guiada por pol?ticas previamente definidas e tem por objetivo permitir a carga de m?dulos de software sob demanda possibilitando melhor utiliza??o dos recursos limitados de um dispositivo m?vel. Um Processo de Desenvolvimento para a constru??o de aplica??es ub?quas tamb?m ? proposto e visa demonstrar um conjunto de atividades a serem executadas para a concep??o de aplica??es ub?quas. Por fim, ? realizado um estudo quantitativo com o intuito de avaliar com base em m?tricas a abordagem baseada em aspectos e composi??o din?mica para a constru??o de aplica??es ub?quas

Made available in DSpace on 2014-12-17T14:07:07Z (GMT). No. of bitstreams: 1 MarcioCSM_TESE.pdf: 957118 bytes, checksum: 7c10d815ada900ecb0efde8936a6064e (MD5) Previous issue date: 2011-07-29 / The growing concern with the solid residues management, observed in the last decade, due to its huge amount and impact, has motivated the search for recycling processes, where these residues can be reprocessed to generate new products, enlarging the cycle of materials and energy which are present. Among the polymeric residues, there is poly (ethylene terephthalate) (PET). PET is used in food packaging, preferably in the bottling of carbonated beverages. The reintegration of post-consumer PET in half can be considered a productive action mitigation of environmental impacts caused by these wastes and it is done through the preparation of several different products at the origin, i.e. food packaging, with recycling rates increasing to each year. This work focused on the development and characterization mechanical, thermal, thermo-mechanical, dynamic mechanical thermal and morphology of the pure recycled PET and recycled PET composites with glass flakes in the weight fraction of 5%, 10% and 20% processed in a single screw extruder, using the following analytical techniques: thermogravimetry (TG), differential scanning calorimetry (DSC), tensile, Izod impact, Rockwell hardness, Vicat softening temperature, melt flow rate, burn rate, dynamic mechanical thermal analysis (DMTA) and scanning electron microscopy (SEM). The results of thermal analysis and mechanical properties leading to a positive evaluation, because in the thermograms the addition of glass flakes showed increasing behavior in the initial temperatures of thermal decomposition and melting crystalline, Furthermore was observed growing behavior in the mechanical performance of polymer composites, whose morphological structure was observed by SEM, verifying a good distribution of glass flakes, showing difference orientation in the center and in the surface layer of test body of composites with 10 and 20% of glass flakes. The results of DMTA Tg values of the composites obtained from the peak of tan ? showed little reductions due to poor interfacial adhesion between PET and recycled glass flakes. / A crescente preocupa??o com a gest?o de res?duos s?lidos, observada na ?ltima d?cada, em virtude de sua enorme quantidade e impacto ambiental, tem motivado a busca por processos de reciclagem, onde estes res?duos podem ser reprocessados de modo a gerarem novos produtos, ampliando o ciclo dos materiais e energia neles contidos. Dentre os res?duos polim?ricos, destaca-se o poli(tereftalato de etileno) (PET). O PET ? utilizado em embalagens de alimentos, preferencialmente, no envase de bebidas carbonatadas. A reintegra??o do PET p?s-consumo ao meio produtivo pode ser considerada uma a??o mitigat?ria dos impactos ambientais causados por estes res?duos e j? ? realizada por meio da obten??o de diversos produtos diferentes ao da origem, ou seja, embalagens para alimento, com taxas de reciclagem crescente a cada ano. Este trabalho focou o desenvolvimento e a caracteriza??o mec?nica, t?rmica, termo-mec?nica, termo-din?mico-mec?nica e morfol?gica do PET reciclado processado e dos comp?sitos de PET reciclado com flocos de vidro na fra??o em peso de 5%, 10% e 20% processados em uma extrusora rosca simples, utilizando as seguintes t?cnicas de an?lise: termogravimetria (TG), calorimetria explorat?ria diferencial (DSC), tra??o uniaxial, impacto Izod, dureza Rockwel, temperatura de amolecimento Vicat, ?ndice de fluidez, taxa de queima, an?lise termo-din?mico-mec?nica (DMTA) e microscopia eletr?nica de varredura (MEV). Os resultados das an?lises t?rmicas e das propriedades mec?nicas conduziram a uma avalia??o positiva, pois nos termogramas as adi??es dos flocos de vidro mostraram comportamento crescente nas temperaturas inicial de decomposi??o t?rmica e de fus?o cristalina, al?m disso, observou-se comportamento crescente no desempenho mec?nico dos comp?sitos polim?ricos, cuja estrutura morfol?gica foi observada por MEV, verificando uma boa distribui??o dos flocos de vidro, apresentando diferen?a na orienta??o no centro e na camada superficial do corpo de prova dos comp?sitos com 10 e 20% de flocos de vidro. Nos resultados de DMTA os valores de Tg dos comp?sitos obtidos a partir do pico de tan ?, apresentaram pequenas redu??es, devido a pobre ades?o interfacial entre o PET reciclado e os flocos de vidro.

?rea de concentra??o: Ci?ncias Fisiol?gicas. / Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2017-10-26T18:38:02Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) vanessa_kelly_silva_lage.pdf: 1557890 bytes, checksum: f19cfa3f49dfb4300750d35b50ea527f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2017-11-08T14:15:37Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) vanessa_kelly_silva_lage.pdf: 1557890 bytes, checksum: f19cfa3f49dfb4300750d35b50ea527f (MD5) / Made available in DSpace on 2017-11-08T14:15:37Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) vanessa_kelly_silva_lage.pdf: 1557890 bytes, checksum: f19cfa3f49dfb4300750d35b50ea527f (MD5) Previous issue date: 2017 / A Doen?a Pulmonar Obstrutiva Cr?nica (DPOC) ? caracterizada por uma obstru??o cr?nica persistente ao fluxo a?reo. Estudos que avaliaram o uso da vibra??o de corpo inteiro (VCI) em pacientes com DPOC demonstraram melhora em par?metros cl?nico-funcionais, contudo, o conhecimento a respeito do efeito agudo da VCI na DPOC ainda ? escasso O estudo teve como objetivo, caracterizar a intensidade do exerc?cio em diferentes frequ?ncias de VCI e dos tipos de agachamento (est?tico ou din?mico) durante uma sess?o de exerc?cio, bem como, avaliar o efeito agudo do exerc?cio sobre as respostas cardiorrespirat?rias e inflamat?rias na DPOC.Os volunt?rios da pesquisa foram pareados quanto ao sexo, idade, IMC e foram divididos em 2 grupos, sendo eles: grupo controle (GC, n=13), composto por sujeitos sem DPOC e grupo DPOC (DPOC, n=13). A familiariza??o e aplica??o do Teste de Caminhada de 6 minutos foram realizadas em 1 dia, ap?s 1 semana, a caracteriza??o com o exerc?cio de VCI foi realizada em 4 dias com um intervalo de 48 horas entre as sess?es. O agachamento est?tico foi realizado nas frequ?ncias 30, 35 e 40 Hz e o agachamento din?mico na frequ?ncia 35 Hz. Os dois grupos passaram pelas mesmas condi??es experimentais. Foram mensurados os par?metros cardiorrespirat?rios durante todos os dias de exerc?cio e os par?metros inflamat?rios foram avaliados durante o exerc?cio est?tico na frequ?ncia de 35 Hz atrav?s da concentra??o plasm?tica da adiponectina, resistina, IL-6, IL-8, IL-10, BDNF e receptores sol?veis de TNF (STNFR-1 e STNFR-2). Os resultados demonstraram que o agachamento est?tico promoveu maior varia??o (39,2%) na FC quando comparado ao din?mico. A an?lise nas 3 frequ?ncias de VCI demonstraram comportamento semelhante entre os grupos com aumentos significativos do VO2 (GC: 27,4 a 40% e DPOC: 21,5 a 28,5%) e da FC (GC: 10,2 a 12,5% e DPOC: 4,3 a 12,7%). Foram encontradas altas concentra??es basais das adipocinas e IL-8 e baixos valores de IL-10 no grupo DPOC. Ap?s a VCI foi observado aumento das concentra??es de IL-10 (40,6%) no grupo DPOC alcan?ando valores semelhante a concentra??o basal do GC. Em conclus?o, o presente estudo traz subs?dios para a elabora??o de protocolos de treinamento com a VCI, uma vez que o exerc?cio foi caracterizado como de baixa intensidade (<2 METs) nas frequ?ncias avaliadas, sendo aplic?vel e seguro na DPOC. Adicionalmente, a VCI parece modular as concentra??es de IL-10 na popula??o de DPOC avaliada. / Disserta??o (Mestrado) ? Programa Multic?ntrico de P?s-gradua??o em Ci?ncias Fisiol?gicas, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2017. / Chronic Obstructive Pulmonary Disease (COPD) is characterized by chronic persistent airflow obstruction. Studies evaluating the use of whole body vibration (WBV) in patients with COPD have shown improvement in clinical-functional parameters, however, knowledge about the acute effect of WBV in COPD is still scarce. The objective of this study was to characterize the intensity (static or dynamic) during an exercise session, as well as to evaluate the acute effect of exercise on cardiorespiratory and inflammatory responses in COPD. The study volunteers were matched for gender, age, BMI and were divided into 2 groups: control group (GC, n = 13), composed of subjects without COPD and COPD group (COPD, n = 13). Familiarization with WBV exercise and the application of the 6-minute Walk Test were performed in one day, after 1 week, the characterization of the WBV exercise was performed in 4 days with a 48-hour interval between sessions. Static squatting was performed at frequencies 30, 35 and 40 Hz and dynamic squatting at 35 Hz frequency. Both groups underwent the same experimental conditions. Cardiorespiratory parameters were measured during all exercise days and inflammatory parameters were evaluated during static exercise at the 35 Hz frequency through the plasma concentration of adiponectin, resistin, IL-6, IL-8, IL-10, BDNF and soluble TNF receptors (STNFR-1 and STNFR-2). The results showed that static squatting promoted greater variation (39.2%) in HR when compared to dynamic. The analysis of 3 frequencies of WBV showed similar results between the groups with significant increases in VO2 (GC: 27.4 to 40% and COPD: 21.5 to 28.5%) and HR (CG: 10.2 a 12.5% e COPD: 4.3 a 12.7%). Baseline concentrations of adipokines and IL-8 showed higher values, in the other hand low IL-10 values were found in the COPD group. After WBV, an increase in IL-10 concentrations (40.6%) was observed in the COPD group reaching values similar to basal GC concentration. In conclusion, the present study provides subsidies for the elaboration of training protocols with WBV, since exercise was characterized as low intensity (<2 METs) in the frequencies evaluated, being applicable and safe in COPD. In addition, VCI appears to modulate IL-10 concentrations in the COPD population evaluated.

The purpose of this study was to present an analysis of Naguib Mahfouz’s writings in relationship to modern Islam, changes in Egyptian Islam, the impact of colonialism, and modern Muslim Identity. The divergent effects and results of transformations in Egypt are analyzed through history, literature, and religion using theoretical religious, psychological, historical, and social world views. Selected writings of Naguib Mahfouz are used as the central body of literature. Naguib Mahfouz’s writings provide a plethora of divergent views on Egypt, Islam, and the emerging new Muslim Identity. Mahfouz’s writings centralize the many dilemmas that Muslims face today in light of modernity, western influences, and a transforming Islam. In this study there were some conclusions drawn about modern Islam and literature that discuss modern Islam as reflected in Mahfouz’s literary portrayals of ordinary Muslims living in Cairo and Alexandria oscillating between their native Eastern culture and Western colonial influences, as well as the existential and spiritual questions that accompany change for modern Muslims. / Religious Studies / D. Litt. et Phil. (Religious Studies)

Made available in DSpace on 2014-12-17T14:44:18Z (GMT). No. of bitstreams: 1 LuizFFJ_DISSERT.pdf: 561001 bytes, checksum: d3e0298e76c38d08d3b0c195db8c91b5 (MD5) Previous issue date: 2014-04-25 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The complex human behavior related to exercise involves cognitive, physical and emotional processing. The recent theories about exercise s intensity regulation have highlighted the role played by psychophysics aspects in controlling exercise s intensity. In this regard, recent evidences have shown that there is variability in human capacity in perceiving interoceptives clues. Thus, subjects more sensitive show higher physiological arousal to physical and/or emotional stress, and sensations with higher intensity. In fact, studies have evidenced that interoceptive feedback modifies behavior in exercise with free load. However, exercise recommendations are based in a constant load standard. Therefore, we aimed to analyze the influence of interoceptive sensibility on psychophysics responses during dynamic exercise performed with constant load. Twenty-four adult males were allocated into two groups accordingly with their interoceptive sensibility: high sensibility (n=11) and low sensibility (13). They underwent to an incremental test (IT) and then randomly to two sections of moderate and severe exercise intensity for 20 minutes. Heart rate (HR), rating of perceived exertion (RPE), affective feelings (AF), alert state (AS), and percentage of associative thoughts were collect during exercise. A two-way ANOVA with repeated measures was used to assess differences between psychophysics responses. There were differences between group in RPE, AF, and AS in moderate intensity. There was no difference in any measure in severe intensity. We conclude that subjects with high interoceptive sensibility feel dynamic moderate exercise more intense than the subjecs with low interoceptive sensibility / INTRODU??O: O complexo comportamento humano de realizar exerc?cio f?sico envolve processamento cognitivo, f?sico e emocional. As recentes teorias sobre fadiga e reposta afetivas ao exerc?cio f?sico atribuem importante papel na regula??o da intensidade do esfor?o aos fatores interoceptivos. Al?m disso, Evid?ncias recentes tem apontado haver variabilidade na capacidade humana em perceber esses est?mulos interoceptivos. Dessa forma, pessoas mais sens?veis apresentam excita??o fisiol?gica mais acentuada ao estresse f?sico e/ou emocional, e maior intensifica??o dessas sensa??es. Adicionalmente, estudos tem relatado que feedback interoceptivo diminui a intensidade do esfor?o exercida, e que pessoas com maior sensibilidade interoceptiva controlam melhor a intensidade de esfor?o em tarefas com ritmo livre. Contudo, os modelos de prescri??o de exerc?cio f?sico din?mico apresentam padr?o de intensidade de esfor?o fechado, e n?o ? conhecida as repostas psicofisiol?gicas entre os grupos de variabilidade interoceptiva durante a realiza??o de exerc?cio f?sico. OBJETIVO: O presente estudo verificou a influ?ncia da sensibilidade interoceptiva sobre as repostas psicofisiol?gicas em exerc?cio din?mico com carga constante. M?TODOS: A amostra foi composta por 24 homens jovens adultos, insufientemente ativos, que foram designados a dois grupos de acordo com seus n?veis de sensibilidade interoceptiva: Alta sensibilidade (n=11) e Baixa sensibilidade (n=13). Todos foram submetidos a um teste incremental (TI) em cicloerg?metro para identifica??o do limiar de variabilidade da frequ?ncia card?aca (LiVFC) e da pot?ncia pico (PP). Posteriormente, os sujeitos foram submetidos (em ordem aleat?ria e cruzada) a dois protocolos experimentais de exerc?cio f?sico em cicloerg?metro durante 20 minutos com intensidade correspondente a 20% abaixo e 20% acima LiVFC. Durante os protocolos experimentais as respostas de Frequ?ncia Card?aca (FC), Percep??o Subjetiva de Esfor?o (PSE), Val?ncia Afetiva (VA), Estado de Alerta e N?vel de pensamento Dissociativo-Associativo ao exerc?cio f?sico foram registradas. O teste de Shapiro-Wilk e as an?lises da m?dia, assimetria e curtose verificaram a normalidade de distribui??o dos dados. O Teste de Mauchly verificou a esfericidade dos dados de medidas repetidas. O Teste t para amostra independente e o Teste de Mann Whitney verificaram as igualdade dos dados descritivos entre os grupos. A ANOVA two away (grupo x momentos) para medidas repetidas verificou as poss?veis diferen?as entre as respostas psicofisiol?gicas. RESULTADOS: Houve diferen?a estatisticamente significante entre os grupos na PSE (F(3,36)=18,50, p=0,000), VA (F(3,36)=4,14, p=0,01) e no Estado de Alerta (F(3,36)=4,03, p=0,01) no exerc?cio realizado em intensidade correspondente a 80% LiVFC. Na intensidade correspondente a 120% LiVFC n?o houve diferen?a entre os grupos, somente entre os momentos em cada grupo. CONCLUS?O: A sensibilidade interoceptiva modifica as respostas psicofisiol?gicas durante a realiza??o de exerc?cio f?sico din?mica com intensidade moderada (abaixo do LiVFC)

Made available in DSpace on 2015-03-03T15:15:23Z (GMT). No. of bitstreams: 1 AntonioMF.pdf: 5580410 bytes, checksum: cf8e01854d7d827d05dd7a75902c3375 (MD5) Previous issue date: 2008-07-11 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Difusive processes are extremely common in Nature. Many complex systems, such as microbial colonies, colloidal aggregates, difusion of fluids, and migration of populations, involve a large number of similar units that form fractal structures. A new model of difusive agregation was proposed recently by Filoche and Sapoval [68]. Based on their work, we develop a model called Difusion with Aggregation and Spontaneous Reorganization . This model consists of a set of particles with excluded volume interactions, which perform random walks on a square lattice. Initially, the lattice is occupied with a density p = N/L2 of particles occupying distinct, randomly chosen positions. One of the particles is selected at random as the active particle. This particle executes a random walk until it visits a site occupied by another particle, j. When this happens, the active particle is rejected back to its previous position (neighboring particle j), and a new active particle is selected at random from the set of N particles. Following an initial transient, the system attains a stationary regime. In this work we study the stationary regime, focusing on scaling properties of the particle distribution, as characterized by the pair correlation function ?(r). The latter is calculated by averaging over a long sequence of configurations generated in the stationary regime, using systems of size 50, 75, 100, 150, . . . , 700. The pair correlation function exhibits distinct behaviors in three diferent density ranges, which we term subcritical, critical, and supercritical. We show that in the subcritical regime, the particle distribution is characterized by a fractal dimension. We also analyze the decay of temporal correlations / Na Natureza ? muito comum ocorrerem processos de difus?o. Muitos sistemas complexos, tais como: col?nias microbianas, agregados coloidais, difus?o de fluidos e migra??es populacionais, s?o compostos de um n?mero muito grande de unidades similares que formam estruturas fractais. Recentemente, um novo estudo destes sistemas foi introduzido por Filoche e Sapoval [68]. Baseado neste trabalho, n?s desenvolvemos um modelo chamado "Difus?o com Agrega??o e Reorganiza??o Espont?nea". Este modelo consiste em um conjunto de part?culas que interagem por meio da exclus?o de volume quando realizam caminhadas aleat?rias em uma rede quadrada. Inicialmente, a rede ? preenchida com uma densidade p = N/L2 de part?culas distribu?das em posi??es distintas escolhidas aleatoriamente. Uma das part?culas ? escolhida ao acaso para se tornar uma part?cula ativa. Esta part?cula executa caminhadas aleat?rias at? visitar um s?tio ocupado por uma part?cula j. Quando a part?cula ativa salta sobre o s?tio ocupado pela part?cula j ? re etida e retorna para a posi??o anterior, e uma nova part?cula ativa ? escolhida aleatoriamente no conjunto de N part?culas contidas na rede. Ap?s um transiente, o sistema alcan?a um regime estacion?rio. Neste trabalho, n?s estudamos este regime estacion?rio, atentando para as propriedades de escala da distribui??o de part?culas que ? caracterizada por uma fun??o de correla??o de pares ?(r). Em seguida, calculamos a m?dia sobre uma sequ?ncia de configura??es geradas nesse regime, usando sistemas de tamanhos L igual a 50, 75, 100, 150, . . . , 700. A fun??o de correla??o de pares exibe comportamentos distintos em tr?s regimes diferentes de densidades, que n?s definimos como regime subcr?tico, cr?tico e supercr?tico. N?s mostramos que no regime subcr?tico, a distribui??o de part?culas ? caracterizada por uma dimens?o fractal. N?s tamb?m analisamos o decaimento das correla??es temporais