The purpose of this research was to evaluate the existing procedures that investigators in South Africa follow in utilising the information contained in the victim statement in the investigation of rape, with the intention of determining the strengths and weaknesses of the procedures and of considering how these procedures can be improved. The researcher explored how investigators internationally use information contained in the victim statement in the successful investigation of rape and read extensively on the topic in international literature sources. The researcher also evaluated the current methods that investigators within the South African Police Service (SAPS) use. The researcher made use of an empirical research design because of the limited information available on the topic of the research, and a qualitative research approach, which enabled real-life observations. Simple random sampling was used to select 20 uniform members as well as 20 investigators of rape incidents for interviewing. Purposive sampling was used to select two public prosecutors attached to the Sexual Offences Court. Data were obtained from their real-life experiences through interviewing them and data were further collected through case studies of case dockets. / Police Practice / M. Tech. (Forensic Investigation)

This dissertation is a concise examination of the complete obverse manuscript (document 1) of the pre-Hispanic pictogram screen-fold painted by the Mixtec Indians of Oaxaca. The study begins with the historiography of Native American Mexican screen-fold books as related by the first historian of the New World, Peter Martyr d’Anghera, in his De orbe novo and proceeds through major authors from the early twentieth century to present day. The nature of “native” history is explored as is the nature of pictogram narrative history. The superficial narrative structure of Codex Zouche-Nuttall, document 1 is then defined and interpretative reading techniques employed in this dissertation are applied to it. The codex document 1 contents (pages 1-41) are then listed in detail by section, structure, personnel, events, and native dates corresponded with the European calendar, this latter in so far as is possible. This definition explicates each of three bifurcated sections of the document, each section consisting of a story plus genealogy or genealogies. Additionally, essays on codex contents are provided to further elaborate these divisions of study within Codex Zouche-Nuttall document 1. These essays explore certain mysterious parts of the stories, as in the case of the Ladies Three Flint and the Four Lords from Apoala. Inferences are made from codex text regarding Postclassic Period Mixtec social organization via both political structure and religion. The end result is a concise elaboration and explanation of the entire document. / text

<p>Jedna od &scaron;iroko zastupljenih metoda za uspe&scaron;nu&nbsp;realizaciju ciljeva naučnog obrazovanja je&nbsp;istraživačka&nbsp; metoda&nbsp; (Inquiry-based instruction),&nbsp;<br />koja se defini&scaron;e kao uključivanje učenika u&nbsp;proces aktivnog učenja kroz postavljanje&nbsp;<br />pitanja, analizu podataka i kritičko mi&scaron;ljenje. Problem ovog istraživanja bio je kako&nbsp;<br />primenom istraživačke metode u razrednoj&nbsp;nastavi&nbsp; povećati postignuća i motivisanost&nbsp;učenika u oblasti prirodnih nauka.</p><p>U teorijskom delu rada analiziran je&nbsp;konstruktivizam kao pedago&scaron;ka osnova&nbsp;<br />kvalitetnog naučnog obrazovanja,&nbsp; Principi i&nbsp;velike ideje naučnog obrazovanja kao osnova za&nbsp;pravilan izbor sadržaja, oblici, karakteristike i&nbsp;modeli istraživačkog učenja i poučavanja,&nbsp;kompetencije nastavnika i načini praćenja i&nbsp;vrednovanja postignuća učenika.&nbsp;</p><p>U empirijskom delu rada prikazani su rezultati&nbsp;pedago&scaron;kog eksperimenta sa paralelnim&nbsp;grupama u kome je proučavana primena&nbsp;istraživačke metode&nbsp; na fizičkim sadržajima&nbsp; u&nbsp;nastavi Prirode i dru&scaron;tva, i njen doprinos&nbsp;efikasnijem sticanju znanja, umeća i navika&nbsp;učenika, povećanju kvaliteta i kvantiteta&nbsp;njihovog znanja, kao i razvoju &nbsp;motivacije za rad&nbsp;u poređenju sa tradicionalnim pristupom. Za&nbsp;potrebe istraživanja oblikovani su inovativni&nbsp;nastavni modeli, testovi znanja i ankete za&nbsp;učenike i roditelje. &nbsp;Uzorak istraživanja činilo je&nbsp;112 učenika iz osam odeljenja četvrtih razreda&nbsp;dve osnovne &nbsp;&scaron;kole u Somboru.&nbsp;</p><p>Rezultati istraživanja su pokazali da primena&nbsp;istraživačke metode u nastavnoj praksi&nbsp;<br />pozitivno utiče na kvalitet i kvantitet stečenih&nbsp;znanja i umeća i da značajno doprinosi&nbsp;povećanju motivacije učenika za izučavanje&nbsp;fizičkih sadržaja. Ovim putem provereni i&nbsp;potvrđeni&nbsp; inovativni nastavni modeli mogu da&nbsp;nađu svoje mesto u nastavnoj praksi i tako&nbsp;doprinesu kvalitetnijoj realizaciji nastave&nbsp;prirodnih nauka, a time i povećanju &nbsp;naučne&nbsp;pismenosti veće populacije učenika.</p> / <p>Inquiry-based instruction is one of the widely used methods&nbsp; for the successful&nbsp; realization of the science teaching goals. It is defined as involving pupils into the&nbsp; process of active learning by asking questions, data analysis and critical thinking.&nbsp; The problem of this research is how the application of inquiry-based instruction in classroom teaching increases pupils&rsquo; motivation and achievement in the field of<br />natural sciences.</p><p>In the theoretical part of the paper the constructivism as a pedagogical basis of quality scientific education,&nbsp; Principles and great ideas of scientific education&nbsp; as a basis for right choice of contents, forms, characteristics and models of inquiry teaching&nbsp; and learning are analyzed, as well as teacher competence and ways of monitoring&nbsp; and evaluating of pupils&rsquo; achievement.</p><p>In the empirical part of the paper the results of pedagogical experiment with parallel groups is presented. In that experiment was studied the implementation of&nbsp; Inquiry-based instruction on physics contents in teaching Nature and Society in classroom teaching, and its contribution to the efficient acquiring knowledge, skills and habits of pupils, increasing the quality and quantity of their knowledge, as well as the developing the motivation to work, in comparison with the traditional approach. For the purposes of this research innovative teaching models, knowledge tests and&nbsp;questionnaire for pupils and parents were designed. The study sample consisted of 112 pupils from eight fourth-grade classes from two primary schools in Sombor.</p><p>The research results showed that the implementation of Inquiry-based instruction in teaching practice positively affects the quality and quantity of acquired knowledge and skills of pupils and significantly contributes to increasing pupils&rsquo; motivation for studying physics contents. Hereby tested and validated innovative teaching models can find their place in the teaching practice and thus contribute to better realization of teaching science, and thus increase scientific literacy of larger population of pupils.</p>

Ce travail avait pour objectif l'étude de l'impact des deux procédés : la déshydratation imprégnation par immersion (DII) et le séchage convectif menés séparément ou combinés sur les transferts couplés d'eau et de saccharose et les principaux critères de qualité de fruit (écart de couleur, teneur en phénols totaux (PT), teneur en acide ascorbique (AA), retrait volumique, activité de l'eau) en prenant la poire Conférences comme modèle. L'effet des procédés sur les morceaux de poire a été appréhendé selon deux approches : (i) une étude globale de l'impact des variables de commandes sur la qualité du produit fini et (ii) une étude cinétique des composés d'intérêt nutritionnel et de la qualité (couleur, retrait, activité de l'eau).Un plan d'expériences composite centré à quatre facteurs et cinq niveaux a été établi (concentration en saccharose de la solution osmotique : 25-65%, température de DII : 20-60 °C, durée de la DII : 0,5-6,5 h, température du séchage convectif : 30-70 °C) pour étudier l'effet global des procédés sur le produit fini. En DII, les paramètres « °Brix, « durée » et « la température de la solution » ont un effet significatif (p < 0,01) sur les pertes en eau, le gain en soluté et les attributs de qualité de morceaux de poire. Les pertes en AA sont plus élevées que les pertes en PT et sont essentiellement dues à l'oxydation et à l'entraînement par l'eau. Durant le séchage convectif, les pertes en PT et en AA dépendent plus de la durée du procédé que de la température d'exposition. Elles atteignent respectivement 80% et 34% après 10 h de séchage à 30 °C. Le changement de couleur de morceaux de poire dépend de la durée et de la température de traitement et est plus prononcé en fin de séchage. Des modèles quadratiques prédictifs ont été proposés pour relier les variables de réponse (aw, différence de couleur, perte en PT et durée totale de traitement) aux paramètres opératoires des deux procédés étudiés. Cependant, la perte en AA décroit linéairement avec la durée de DII. Une optimisation multicritères en utilisant la méthodologie des surfaces de réponse (MSR) a été proposée (pertes minimales en PT et en AA, durée totale du traitement et différence de couleur réduites et une aw inférieure à 0,6) pour la combinaison DII/séchage. Les conditions optimales sont : solution osmotique à 28°C et 25°Brix, une durée de DII de 30 min et un séchage convectif à 60 °C. Par ailleurs, les effets de la température (30, 45 et 60 °C) et de l'imprégnation en saccharose par DII (10 et 65 min, 70°Brix, 30 °C) sur les isothermes de désorption et sur la température de transition vitreuse (Tg) de morceaux de poires, de pommes et d'abricots ont été déterminés. L'imprégnation en saccharose du tissu végétal atténue l'influence de la température sur sa capacité de sorption. Elle engendre un effet dépresseur de l'activité de l'eau et une augmentation de l'hygroscopicité de la poire, la pomme et l'abricot à température élevée. Les isothermes de désorption des abricots frais et enrichis en saccharose présentent un croisement des courbes marquant l'inversement de l'effet de la température sur les isothermes. La Tg dépend de la température, de la teneur en saccharose et de la teneur en eau des fruits. Pour une teneur en eau constante, l'augmentation de la température et la durée de DII se traduisent par l'augmentation de la Tg. Les digrammes de phase (Tg=f(X) et Tg=f(aw)) des fruits ont été établis à 30, 45 et 60°C et les teneurs en eau critiques ainsi que les activités d'eau critiques ont été déterminées. Une teneur en eau en fin de séchage inférieure ou égale à 0,02 g/g M.S. est recommandée pour l'obtention de morceaux de fruit stables aux niveaux microbiologique, physicochimique et rhéologique. / The aim of this work was the study of the impact of both drying processes: dehydration-impregnation by soaking (DIS) and convective drying performed separately or in combination on mass transfers of water and sucrose and on the main quality characteristics of the fruit (total difference of colour, total phenols (TP) and ascorbic acid (AA) contents, shrinking, water activity) by taking the pear Conference as a model. The processes effect on the pieces of pear was apprehended according two approaches: (i) a global study of the impact of the variables of commands on the quality of finished product and (ii) a kinetic study of nutritional compounds and the quality (colour, shrinkage, and water activity). Central Composite Design with four factors (sucrose concentration: 25-65 %, temperature: 20-60 °C, immersion time: 0.5-6.5 hr and drying temperature: 30-70 °C) at five levels each was used for pears processing. During DIS, the variables: immersion time, temperature and concentration of sucrose solution had a significant effect (p<0.01) in the loss of water, the solid gain and the quality attributes of pears. The losses in AA are higher than those in TP and are essentially due to the oxidation and the leaching with water. During the convective drying, the losses in TP and in AA depend more on the time of the process rather than the temperature of exposition. They reach respectively 80% and 34% after 10 h of drying at 30 °C. The color change of pear depends on the time and temperature of treatment and is more pronounced at the end of drying. Predictive and quadratic models were suggested to link the responses variables (aw, total colour difference, TP loss and total time treatment) to operational parameters of both studied processes. The losses in AA decrease linearly with the duration of DIS. A multicriteria optimization using response surface methodology (RSM) was proposed (minimal losses in TP and in AA, reduced total processing time and total difference in colour and an aw inferior to 0.6) for the combination DIS/convective drying. The optimal conditions are: osmotic solution at 28°C and 25°Brix, a DIS lasting 30 min and a convective drying at 60 °C. Otherwise, the temperature effects (30, 45 and 60 °C) and the sucrose impregnation by DIS (10 and 65 min, 70°Brix, 30 °C) upon the desorption isotherms and the transition temperature (Tg) of pears, apples and apricots were determined. The sucrose impregnation diminishes the influence of temperature on its sorption ability. It generates a depressing effect on water activity and a rise of pear hygroscopicity, apple and apricot at a high temperature. The desorption isotherms of fresh and sucrose impregnated apricot present a crossing of curves which mark the inverse of the effect of temperature on isotherms. The Tg depends on the temperature, the sucrose content and the fruit water content (X). For constant water content, the rise of temperature and of the duration de DIS result in the increase of Tg. The phase diagrams (Tg=f(X) et Tg=f(aw)) of fruits were established at 30, 45 and 60°C and the critical water content as well as the critical water activities were determined. Water content at the end of drying inferior or equal to 0.02 g/g d.b. is recommended to obtain stable fruit pieces at microbiological, physiochemical and rheological levels.

Produtores de pêssegos e nectarinas utilizam mudas cujos porta-enxertos são provenientes de sementes, gerando desuniformidade entre as plantas e nenhum aproveitamento das vantagens trazidas por porta-enxertos clonais, de aspectos genéticos conhecidos. O presente estudo objetivou avaliar o desempenho inicial de nectarineiras Sunraycer de 1-2 anos de idade autoenraizadas e sobre treze porta-enxertos clonais nas condições edafoclimáticas de Piracicaba, SP, durante os anos de 2015 e 2016. No primeiro capítulo dessa dissertação, apresentaram-se os resultados relacionados à ocorrência das fases de florescimento, brotação e colheita, volume de copa, massa de ramos retirada nas podas, massa de fruto, número de frutos e produção por planta, eficiência produtiva, produtividade e diâmetro transversal dos frutos. O intervalo entre o final do florescimento e o fim da colheita foi de 78 dias para a copa de \'Sunraycer\' sobre os porta-enxertos \'G x N.9\' e \'Santa Rosa\' e de 64 dias sobre \'Ishtara\', períodos menores que os relacionados aos demais materiais genéticos. \'Flordaguard\' e \'Ishtara\' induziram maior e menor vigor à copa de \'Sunraycer\', respectivamente, enquanto a maior produção ocorreu sobre o porta-enxerto \'Flordaguard\'. A copa de \'Sunraycer\' é influenciada negativamente pelo porta-enxerto \'Cadaman\' quanto a variáveis de produção. Frutos de maior massa são obtidos em plantas de \'Sunraycer\' autoenraizadas. O tradicional \'Okinawa\' não se destaca como porta-enxerto para \'Sunraycer\'. É possível colher nectarinas \'Sunraycer\' entre 03/10 e 18/10 em Piracicaba, SP, período este de pouca oferta. No segundo capítulo, objetivou-se determinar os teores de macro e micronutrientes (N, P, K, Ca, Mg, S, Fe, Mn, Cu, Zn e B) presentes em folhas de nectarineiras Sunraycer, treze semanas após o florescimento, visando a avaliar, interpretar e determinar o estado nutricional das mesmas, identificando possíveis materiais genéticos mais eficientes em absorver/translocar tais elementos. Observa-se distinta composição nutricional das folhas de \'Sunraycer\' em plantas autoenraizadas e sobre porta-enxertos clonais. \'Ishtara\', \'Tsukuba-3\', \'Barrier\' e \'Flordaguard\' são porta-enxertos eficientes na absorção da maioria dos nutrientes sob nectarineiras Sunraycer. Mais casos de deficiência nutricional são observados em plantas de \'Sunraycer\' sobre o porta-enxerto \'Santa Rosa\', para nitrogênio, potássio, cálcio, enxofre, ferro e zinco. / Peach and nectarine producers employ scions grafted in seedling rootstocks, resulting in unevenness between plants and disregarding advantages brought by clonal rootstocks, with known genetic aspects. The present study aimed to evaluate the initial performance of 1-2-year-old Sunraycer nectarine trees on their own roots and grafted on thirteen clonal rootstocks in the edaphoclimatic conditions of Piracicaba city, São Paulo State, Brazil, in the years of 2015 and 2016. Results related to the occurrence of flowering, budding and harvest phases, the canopy volume, pruning fresh weight, fruit mass, number of fruits and production per plant, productive efficiency, yield and fruit transverse diameter are presented in the first chapter of this dissertation. The interval between the end of flowering and the end of the harvest period was 78 days to \'Sunraycer\' grafted onto \'G x N.9\' and \'Santa Rosa\' rootstocks and 64 days to this scion onto \'Ishtara\', shorter periods than those related to other rootstocks. \'Flordaguard\' and \'Ishtara\' induced higher and lower vigor to \'Sunraycer\', respectively, whereas \'Flordaguard\' enabled greater production to \'Sunraycer\'. The \'Sunraycer\' scion is negatively influenced by \'Cadaman\' rootstock in terms of production variables. Heavier fruits are provided by self-rooted plants. The traditional \'Okinawa\' does not stand out as a rootstock for \'Sunraycer\'. It is possible to harvest \'Sunraycer\' nectarines between 03/10 and 18/10 in Piracicaba, SP, which is a period of low supply. In the second chapter, the objective was to determine the foliar levels of macro and micronutrients (N, P, K, Ca, Mg, S, Fe, Mn, Cu, Zn and B) in Sunraycer nectarine trees, thirteen weeks after flowering to evaluate, interpret and determine their nutritional status, identifying some possible more efficient genetic materials in absorbing / translocating such elements. It was verified that clonal rootstocks and self-rooted plants provide a distinct nutritional composition to \'Sunraycer\' leaves. \'Ishtara\', \'Tsukuba-3\', \'Barrier\' and \'Flordaguard\' are efficient rootstocks to the absorption of most of the nutrients under Sunraycer nectarine trees. \'Santa Rosa\' allows more nutritional deficiencies to \'Sunraycer\' plants, as of nitrogen, potassium, calcium, sulfur, iron and zinc.

Um problema freqüentemente encontrado por educadores nas mais diversas áreas é conciliar o volume crescente de informação com a manutenção e/ou, não raro, a diminuição das cargas horárias de seus cursos. Esta situação real necessariamente obriga o educador a fazer uma severa seleção dos conteúdos a serem trabalhados. No cenário atual da maior parte das instituições de ensino esta decisão é tomada pelo professor. É possível estabelecer metodologias novas de ensino ao longo do tempo sem abrir mão da qualidade do ensino. Para isso, é necessário em primeiro lugar determinar os conteúdos considerados imprescindíveis para que o ensino seja considerado adequado. Partindo do pressuposto de que as questões das provas aplicadas em uma disciplina revelam os conteúdos que os professores consideram mais importantes, foram analisadas as questões de provas aplicadas em diferentes disciplinas oferecidas pelo Departamento de Bioquímica da USP. O objetivo deste trabalho foi responder a duas questões (1) Qual a extensão e a profundidade dos conteúdos comuns aos cursos básicos de Bioquímica? e (2) Há (e, se houver, quais são?) conteúdos específicos para diferentes habilitações? A estratégia adotada foi verificar os conteúdos exigidos pelas questões e classificar o nível cognitivo exigido utilizando a Taxonomia de Bloom. Os conteúdos mais frequentemente abordados são Estrutura de Proteínas e Regulação do Metabolismo. Os resultados indicam forte predominância de níveis cognitivos baixos (Conhecimento e Compreensão), com pouca representatividade de níveis cognitivos altos (de Aplicação a Avaliação). Espera-se com os resultados deste estudo mapear os conteúdos considerados importantes e a forma como são abordados para subsidiar a discussão sobre o estabelecimento de um currículo mínimo comum às disciplinas de Bioquímica / Educators in the most diverse fields face a common problem of managing the increasing amount of information with the same or even lower level of class hours in their courses. As a consequence, educators have to cover selected topics, which selection is entirely up to the teacher in most education institutions. In order to establish new teaching methodology while maintaining teaching quality, educators need first to select the most essential topics. Assuming that questions from biochemistry program tests reflect the topics considered most relevant by the faculty, questions from different courses offered by the Biochemistry Department of Universidade de São Paulo (USP) were analyzed with the purpose of determining (1) the extent and depth of the common topics of the basics biochemistry programs and (2) the existence of specific recurring topics for different careers. The adopted methodology seeked to identify the most recurring topics in tests questions and to classify the demanded cognitive level according to Blooms Taxonomy. The research identified Protein Structure and Metabolism Regulation as the most recurring topic, and indicates a strong predominance of low cognitive levels (Knowledge and Comprehension), with little presence of high cognitive levels (from Application to Evaluation). This study intended to outline the topics considered relevant by the faculty providing results that are required to focus the academic discussion for creating core curricula for biochemistry courses

Le contexte de la thèse porte sur le contrôle des réseaux de distribution de contenu à la demande. La performance des systèmes distribués interactifs dépend essentiellement sur la prévision du comportement de l'utilisateur et la bande passante en tant que ressource de réseau critique. Le préchargement est une approche prédictive bien connu dans le World Wide Web ce qui évite les délais de réponse en exploitant un temps d'arrêt que permet d'anticiper les futures demandes de l'utilisateur et prend avantage des ressources réseau disponibles. Le contrôle de préchargement est une opération vitale pour les systèmes à la demande interactifs où la réponse instantanée est le facteur crucial pour la réussite du système. Le contrôleur en ce type de système interactif fonctionne dans un environnement incertain et rend séquences de décisions à court et long terme effets stochastique. La difficulté est alors de déterminer à chaque état du système les contenus préchargés dans le cache. Le plan de préchargement pendant une session en flux continu interactif peut être modélisé comme un problème de décision séquentielle par les processus de décision de Markov (MDP). Nous nous concentrons sur le problème de contrôle de préchargement, dans lequel le contrôleur cherche à atteindre l'état du système à coût zéro aussi vite que possible. Nous modélisons ce problème de contrôle comme un problème de programmation dynamique stochastique négatif dans lequel nous minimisons le coût total prévu. Dans ce contexte, nous avons abordé les questions de recherche suivantes: 1) Comment fournir un politique de préchargement optimale/ approximative optimale qui maximise l'utilisation de la bande passante tout en minimisant les coûts de blocage et de la latence de l'utilisateur engagés sur le chemin? 2) Comment exploiter la structure du modèle de contrôle de préchargement pour aider efficacement calculer la politique de contrôle de préchargement avec la réduction des efforts de calcul et la mémoire de stockage? 3) Comment mener une étude d'évaluation pour évaluer le préchargement de différents algorithmes heuristiques basée sur le contexte de l'optimisation au lieu du cadre de l'empirique / simulation. Pour l'étude de notre problème de recherche, nous avons développé notre modèle MDP de préchargement, PREF-CT, nous avons établi ses propriétés théoriques et nous avons résolu par l'algorithme Value Iteration comme algorithme MDP pour calculer la politique de préchargement optimale. Pour calcul de la politique de préchargement optimale efficace, nous avons détecté une structure spéciale qui réalise un modèle de contrôle plus compact. Cette structure spéciale permet de développer deux algorithmes différents stratégiquement qui améliorent la complexité du calcul de la politique de préchargement optimale: - la première est « ONE-PASS » le second est « TREE-DEC ». Pour surmonter le problème de la dimensionnalité résultant du calcul de la politique de préchargement optimale, nous avons proposé l'algorithme de préchargement heuristique: « Relevant Blocks Prefetching » (RBP). Pour évaluer et comparer le préchargement politiques calculés par des algorithmes de préchargement heuristiques différents, nous avons présenté un cadre fondé sur des différentes mesures de performance. Nous avons appliqué le cadre proposé sous différentes configurations de coûts et différents comportements des utilisateurs pour évaluer les politiques de préchargement calculées par notre algorithme de préchargement proposé; RBP. Par rapport aux politiques de préchargement optimales, l'analyse expérimentale a prouvé des performances significatives des politiques de préchargement de l'heuristique du RBP algorithme. En outre, l'algorithme heuristique de préchargement; RBP se distingue par une propriété de clustériser qui est important pour réduire considérablement la mémoire nécessaire pour stocker la politique de préchargement. / The thesis context is concerned with the control of theOn-demand contents distribution networks. The performance of suchinteractive distributed systems basically depends on the prediction ofthe user behavior and the bandwidth as a critical network resource.Prefetching is a well-known predictive approach in the World Wide Webwhich avoids the response delays by exploiting some downtime thatpermits to anticipate the user future requests and takes advantage ofthe available network resources. Prefetching control is a vitaloperation for the On-demand interactive systems where the instantaneousresponse is the crucial factor for the system success. The controller insuch type of interactive system operates in an uncertain environment andmakes sequences of decisions with long and short term stochasticeffects. The difficulty, then, is to determine at every system statewhich contents to prefetch into the cache. The prefetching plan duringan interactive streaming session can be modeled as a sequential decisionmaking problem by a Markov Decision Process (MDP). We focus on theprefetching control problem in which the controller seeks to reach aZero-Cost system state as quickly as possible. We model this controlproblem as a Negative Stochastic Dynamic Programming problem in which weminimize the undiscounted total expected cost. Within this context, weaddressed the following research questions: 1) How to provide anoptimal/approximate-optimal prefetching policy that, maximizes thebandwidth utilization while minimizes the user's blocking and latencycosts incurred along the way? 2) How to exploit structure in theprefetching control model to help efficiently compute such prefetchingcontrol policy with both computational efforts and storage memoryreduction? 3) How to conduct a performance evaluation study to evaluatedifferent prefetching heuristic algorithms based on the context of thecontrol optimization rather than the context of theempirical/simulation. For studying our research problem, we developedour MDP prefetching control model, PREF-CT, we established itstheoretical properties and we solved it by the Value Iteration algorithmas MDP algorithm for computing the optimal prefetching policy. Forcomputing the optimal prefetching policy efficiently, we detected aspecial structure that achieves more compact control model. This specialstructure permits to develop two strategically different algorithmswhich improve the complexities of computing the optimal prefetchingpolicy: - the first one is the ONE-PASS which is based mainly on solvinga system of linear equations simultaneously in only one iteration,whereas the second is the TREE-DEC which is based on Markov decisiontree decomposition in which sequential sets of systems of equations aresolved. For overcoming the problem of the curse of dimensionalityresulting from the computation of the optimal prefetching policy, weproposed the prefetching heuristic algorithm: the Relevant BlocksPrefetching algorithm (RBP). For evaluating and comparing prefetchingpolicies computed by different prefetching heuristic algorithms, wepresented a framework based on different performance measures. Weapplied the suggested framework under different costs configurations anddifferent user behaviors to evaluate the prefetching policies computedby our proposed prefetching heuristic algorithm; the RBP. Compared tothe optimal prefetching policies, the experimental analysis provedsignificant performance of the prefetching policies of the RBP heuristicalgorithm. In addition, the RBP prefetching heuristic algorithm isdistinguished by a clustering property which is of importance to reducesignificantly the memory necessary to store the prefetching policy tothe controller.

Esta dissertação de mestrado se destina a analisar as bibliotecas digitais apresentando, de início, um breve retrospecto histórico e social sobre a importância do livro e o surgimento das bibliotecas como centros de armazenamento do conhecimento humano. Nesse sentido, serão apresentados os caminhos que levaram o mundo a viver atualmente a realidade da chamada sociedade da informação. Após a análise dos conceitos, características e funcionalidades das bibliotecas digitais, serão apresentados alguns exemplos de experiências concretas bem sucedidas nessa área para, em seguida, discutir os dois outros elementos que compõem esse trabalho: a busca pelo acesso à cultura e os limites a ele impostos pela proteção ao direito de autor. O objetivo final é colaborar com a busca de respostas que representem o equilíbrio entre o direito coletivo, representado pelo interesse social de livre acesso ao conhecimento e à cultura, e o interesse individual dos titulares de obras, protegido pelo direito de autor. / This masters dissertation aims to analyze the digital libraries presenting a brief history and social retrospect about the importance of the book and the creation of libraries as storage centers of human knowledge. In this sense, the paths that led the world to live the reality of the currently called information society will be presented. After analyzing the concepts, features and functionality of digital libraries, some examples of successful experiences in this area will be presented, and then discussion of two other elements of this work: the search for access to culture and the limits imposed on it by the protection of copyright. The ultimate goal is to collaborate with the search for answers that represent the balance between the collective right represented by the social interest of free access to knowledge and culture and the individual interests of the holder´s works protected by copyright.

Orientador: Miguel Angelo Mutton / Banca: Ignácio José de Godoy / Banca: Edson Lazarini. / Banca: José Frederico Centurion / Banca: Gil Miguel de Sousa Centurion / Resumo: No estado de São Paulo, o amendoim é cultivado principalmente na sucessão à cana-de-açúcar e pastagem, em duas regiões distintas quanto às condições edafoclimáticas. Atualmente, devido ao aumento das áreas com canaviais colhidos sem queima e dos sistemas de integração agricultura e pecuária, os produtores têm a oportunidade de adotarem manejos de solo conservacionistas. Considerando as peculiaridades morfo-fisiológicas da planta de amendoim, os objetivos desta pesquisa foram : estudar as características agronômicas e extração de nutrientes de duas cultivares de amendoim com hábitos de crescimento contrastantes em três manejos de solo sobre palhada de cana crua e pastagem, bem como avaliar os efeitos desses sistemas sobre alguns atributos químicos, físicos e microbiológicos do solo. Foram instalados 12 experimentos de campo, conduzidos de 1999/2000 até 2004/2005, na áreas experimentais da APTA (antigas estações do IAC e IZ), sendo 9 em Latossolo vermelho (Ribeirão Preto, 6 em cana crua e 3 em pastagem) e 3 em Argissolos, dos quais 2 (pastagem e cana crua) em Pindorama e 1 (pastagem) em Mirassol. Em delineamento experimental blocos casualizados os tratamentos foram arranjados em esquema de parcelas subdivididas, utilizando-se 4 repetições. As parcelas compreenderam os sistemas de manejo convencional (arado de aivecas + gradagens), cultivo mínimo (5 L.ha-1de glifosate + arado subsolador ASTMATIC 450®, Tatu Marchesan) e plantio direto (5 L.ha-1de glifosate). As sub-parcelas foram constituídas pelas cultivares IAC-Tatu ST (ereta) e IAC-Caiapó (rasteira)...(Resumo completo, clicar no acesso eletrônico abaixo) / Abstract: In Sao Paulo State, Brazil, peanut has been cultivated in rotation with sugarcane and pasture in two regions with different soil type and climate conditions. Nowadays, due to the increase of sugarcane area harvested without burning and the crop-livestock integration systems, the peanut growers have a great opportunity to plant in the conservation tillage, mainly in no-tillage system. Considering the specific morphological and physiological characteristic of peanut plant, the aims of this research were to study the agronomic characteristics and nutrient contents of two different peanut cultivars in three tillage systems in rotation with sugarcane and pasture, as well as their effects in some chemical, physical and microbiological soil attributes. Twelve field experiments were conducted from 1999/2000 to 2004/2005, at the followings places: Ribeirão Preto (Oxisoil), Pindorama (Ultisoil) and Mirassol (Ultisoil). Seven trials were installed on sugarcane straw and five in rotation with pasture, which were situated at APTA experimental station. Tillage treatments were arranged in split-plot randomized complete block design with four replications. The main plots were the tillage treatments (conventional, reduced and no-tillage) while the subplots were peanut cultivars (IACTatu ST and IAC-Caiapó). In the conventional tillage, soil was turned with a moldboard plow and disked. Reduced tillage was made with subsoiler shank (ASTMATIC 450 , Tatu Marchesan) after the herbicide application. In no-tillage systems, the sugarcane plant and pasture were killed with glyphosate (2.4 kg a.i.ha-1). Some agronomic characteristics (pod and kernels yield, percentage of sound mature kernels, plant density and dry matter of root in different layers), nodulation (number and dry matter) and nutrient contents (N,P, K, Ca, Mg, S, Cu, Mn, Zn) in plants were evaluated...(Complete abstract, acess undermentioned eletronic adress) / Doutor

Cette recherche de thèse questionne la dimension matérielle des pratiques, et plus particulièrement celle concernant les outils d’enseignement et d’apprentissages que constituent les affiches. Mon objet de recherche se construit dans l’analyse du discours des enseignants et de celui des élèves. Je tente d’identifier leurs représentations et leurs conceptions de l’affiche, telles qu’ils disent la pratiquer, telles qu’ils s’y investissent selon les pédagogies qu’ils mettent en place. La caractérisation des pratiques d’affichage selon les disciplines scolaires contribue à des modélisations dans les espaces didactique et institutionnel, dans celui des manuels scolaires, des pratiques enseignantes et des pratiques des élèves. / This thesis research questions the material dimension of practices, especially that concerning the teaching and learning tools that are posters. The topic of my research is built into the analysis of the speech of teachers and the pupils. I try to identify their representations and views of the poster, as they say the practice, as they invest themselves according to the teaching methods they implement. The characterization of the poster practices according to the practical school subjects contribute to modeling in teaching and institutional spaces, in one of textbooks, teaching practices and pupils practices.