8 resultados para Contaminación de largo alcance

em Universidade Federal do Rio Grande do Norte(UFRN)


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O Programa Nacional de Alimentação Escolar tem como objetivo atender as necessidades nutricionais dos alunos durante sua permanência em sala de aula, contribuindo para o crescimento, o desenvolvimento, o rendimento escolar e a formação de hábitos alimentares saudáveis. Diante da relevância social e considerando os princípios do direito humano da alimentação adequada e da segurança alimentar, é fundamental o monitoramento da execução e consecução das metas nutricionais estabelecidas pelo programa. Desta forma, este estudo teve como objetivos analisar a qualidade nutricional dos cardápios ofertados em escolas públicas de um município rural do Nordeste brasileiro, quanto à composição nutricional, custo com gêneros alimentícios, nível de adesão dos escolares às refeições oferecidas e atendimento às recomendações nutricionais do Programa Nacional de Alimentação Escolar. Foi desenvolvido estudo transversal, realizado com 473 escolares, em Nísia Floresta, município do Estado do Rio Grande do Norte. A frequência de consumo semanal da alimentação escolar foi analisado segundo o padrão adotado por Sturion et al., que classifica o nível de adesão em: efetiva (quatro a cinco dias), média (dois a três dias) e baixa (um dia). Analisou-se 64 preparações da alimentação escolar, eleitas de forma aleatória por conglomerado, avaliadas quanto à energia, macronutrientes e micronutrientes (vitaminas A e C, ferro, zinco, magnésio e cálcio). Utilizaram-se como parâmetros as recomendações nutricionais estabelecidas pelo programa (2009), para atender 20% das necessidades nutricionais diárias, considerando as faixas etárias de 6 a 10, 11 a 15 e 16 a 18 anos. Calculou-se o custo das preparações servidas com base na licitação realizada no município. A associação entre adesão e extratos etários foi investigada utilizando a análise de correlação. A energia oferecida pelos cardápios foi inferior a recomendação em até 50%. As refeições atingiram, em média, 249,34 kcal (±64,43). Observaram-se preparações com inadequação dos macronutrientes e micronutrientes, exceto para proteínas (102,3%) e lipídios (100,1%), na faixa etária ix de 6 a 10 anos. O custo das preparações foi R$ 0,53 (±0,16), sendo provenientes 56,6% de recursos federais e 43,4% da contrapartida municipal, com essencialidade de recursos municipais no provimento do custo. Quanto à adesão, 93,9% dos escolares informaram consumir os lanches. Para o nível de adesão, obtiveram-se: 67,2% efetiva, 21,8% média e 4,9% baixa. Foi encontrada associação significativa entre as variáveis adesão e idade (χ2 = 89,36; GL=6; P < 0,001), sendo a baixa adesão encontrada, sobretudo, na faixa de 16 aos 18 anos. Os cardápios ofertados não atingem as metas do Programa Nacional de Alimentação Escolar, favorecendo a insegurança alimentar, especialmente aos adolescentes. Portanto, há necessidade de reformulações, planejamento, e implantação de refeições diferenciadas e adequadas às distintas faixas e factíveis de execução

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At this research we attempted to understand what feeds and supports the faith and popular religiosity at Pedro s Cave in Ribeirao do Largo, located in Bahia State. For this we studied the visitation ritual at Pedro s Cave on June 29th and tried to identify the importance of this ritual in the construction and reconstruction of believer s faith. Moreover, we endeavored to understand which factors led Pedro Afonso Nascimento, a cowhand whose lift was taken in a violent manner, to the roll of popular saints and how it was built around his tomb a sanctuary of constant visitation

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This study was elaborated based on our research of the work Mithologiques by the anthropologist Claude Lévi-Strauss (1908-2009), which affirms that languages, indigenous myths and music are related. He proposes that the understanding of myths occurs in a similar manner as with an orchestral score. In the course of his tetralogy we investigated the musical terms used in the analysis and in the division of the chapters, especially in the first volume of his work. Several compositional procedures and forms are named. Composers in pairs are categorized: Sebastian Bach for the code, Ludwig van Beethoven for the message, and Richard Wagner for the myths. In this deduction, we structured in parts: theme and variations, sonata and fugue with the aforementioned composers. Within the greatness of anthropological study, from among over 800 myths, we selected the first five of the indigenous tribe Bororo to discuss within the Theme and Variation segment. In the Sonata part there are two myths with the same theme: The wife of the jaguar which relates to the compositional structure, and four myths about The origin of women. Finally, in the segment related to the Fugue, we collected four myths that address The shortness of life. Honoring the many terms expressed in opposition, contrast, or symmetry under consideration in Levi-Strauss work, we entitled this thesis emphasizing the migration between the tempos Largo and Prestíssimo as these are oppositional presentations in music. Fifteen musical myths accompany the work supported by selected narratives. In light of this we questioned, we questioned: how are incest, murder and other events part of a society that elevates nature as an extension of life itself? And how did Lévi-Strauss think that anthropology harmonized with music? In the preparation of this study, philosophers like Peter Sloterdijk discuss the circular territory of Mythology

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The following dissertation has as its main advantage the privilege of visualizing the literacy processes through the angle of the functional perspective, which does not see the literary process as a practice solely based on the decoding of alphabetical codes, and then allows for the opening of ample spaces for the allocation of mathematical skills in the realms of the functional literacy. The main object of this study was to investigate which are the contributions that a sequence of activities and of methodologies developed for the teaching of Geometry could provide for a part of the functional literacy process in mathematics of youngsters and adults of EJA, corresponding to the acquisition or to the improvement of skills related to the orientation capacity. The focus of the analyses consisted in the practice of these activities with the young and adult students of an EJA class belonging to a municipal public school of Natal/RN. The legacies of Paulo Freire about the redimensioning of the role of the teacher, of the students, of the knowledge and of their connections within the teaching-learning process, prevailed in the actions of the methodology implemented in the classroom and, especially, in the establishing of dialogic connections with the students, which directed all the observations and analyses regarding the collected information. The results indicated that the composition of articulations between the teaching of mathematics and the exploration of maps and the earth globe enabled the creation of multidisciplinary learning environments and situations, where we could observe, gradually, the development of procedures and attitudes indicating the evolution of space-visual type skills

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La Post-Graduación brasilera ha desarrollado, a lo largo de los años, un papel central en la formación de cuadros académicos de alto nivel, para el desarrollo nacional. En el contexto de la UFRN, el Programa de Post-Graduación en Educación, creado inicialmente en 1977 para formar maestres en Educación, implementando el doctorado en esa área, después de diez y siete años, es pionero. En esa trayectoria, avanza y se destaca en el Estado y en las regiones Norte y Nordeste, como uno de los programas con una fuerte lideranza en la formación de profesores investigadores y de otros profesionales de la educación. El presente estudio tiene como objetivo central, tornar público y revelar el alcance del PPGEd como importante centro de formación de investigadores en educación. Para esa finalidad fue definido un recorte teórico-metodológico apoyados en cuestiones posibles de se identificar, tal como: ¿Cuál es el impacto de ese proyecto de formación de maestreados y doctores en educación en el periodo de 1981 a 2005?. ¿Cuál es la trayectoria de los egresados de ese proyecto de formación?. ¿ Dónde actuaban en el momento de ingreso al programa?, y ¿a dónde pasaron a actuar profesionalmente con el título de la postgraduación?. ¿Cuál es contribución de ese proyecto de Postgraduación en la formación de cuadros para la UFRN y para las regiones del país?.La investigación y la colecta de datos fueron realizadas en el mismo Programa de Postgraduación por medio de consultas a varios documentos, como: proyecto curricular, del PPGED, resoluciones, pareceres ( del Programa, de la UFRN, de la CAPES), informes DATA CAPES, anuarios de congresos ( ANPED y ANPED Regional ), fichas individuales de los egresos, además de entrevistas con estudiantes, profesores, e ex coordinadores del PPGEd. El referencial teórico se apoyó en trabajos de autores aue han ganado una expresión en esa temática, como Gatti, Cury, Fávero, Madeira, Marcondes, Horta, sabían, entre otros. Después de trazar la trayectoria de los egresos, maestres y dotores, el estudio se propone, con sus desdoblamientos y continuidad, la elaboración de un Sistema de Control Académico de los Egresos ( SCAE ), apoyado en indicadores para dar visibilidad y relevancia social y académica a la formación de Maestres y Doctores por el PPGEd de la UFRN

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In this thesis we investigate physical problems which present a high degree of complexity using tools and models of Statistical Mechanics. We give a special attention to systems with long-range interactions, such as one-dimensional long-range bondpercolation, complex networks without metric and vehicular traffic. The flux in linear chain (percolation) with bond between first neighbor only happens if pc = 1, but when we consider long-range interactions , the situation is completely different, i.e., the transitions between the percolating phase and non-percolating phase happens for pc < 1. This kind of transition happens even when the system is diluted ( dilution of sites ). Some of these effects are investigated in this work, for example, the extensivity of the system, the relation between critical properties and the dilution, etc. In particular we show that the dilution does not change the universality of the system. In another work, we analyze the implications of using a power law quality distribution for vertices in the growth dynamics of a network studied by Bianconi and Barabási. It incorporates in the preferential attachment the different ability (fitness) of the nodes to compete for links. Finally, we study the vehicular traffic on road networks when it is submitted to an increasing flux of cars. In this way, we develop two models which enable the analysis of the total flux on each road as well as the flux leaving the system and the behavior of the total number of congested roads

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The new technique for automatic search of the order parameters and critical properties is applied to several well-know physical systems, testing the efficiency of such a procedure, in order to apply it for complex systems in general. The automatic-search method is combined with Monte Carlo simulations, which makes use of a given dynamical rule for the time evolution of the system. In the problems inves¬tigated, the Metropolis and Glauber dynamics produced essentially equivalent results. We present a brief introduction to critical phenomena and phase transitions. We describe the automatic-search method and discuss some previous works, where the method has been applied successfully. We apply the method for the ferromagnetic fsing model, computing the critical fron¬tiers and the magnetization exponent (3 for several geometric lattices. We also apply the method for the site-diluted ferromagnetic Ising model on a square lattice, computing its critical frontier, as well as the magnetization exponent f3 and the susceptibility exponent 7. We verify that the universality class of the system remains unchanged when the site dilution is introduced. We study the problem of long-range bond percolation in a diluted linear chain and discuss the non-extensivity questions inherent to long-range-interaction systems. Finally we present our conclusions and possible extensions of this work

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A linear chain do not present phase transition at any finite temperature in a one dimensional system considering only first neighbors interaction. An example is the Ising ferromagnet in which his critical temperature lies at zero degree. Analogously, in percolation like disordered geometrical systems, the critical point is given by the critical probability equals to one. However, this situation can be drastically changed if we consider long-range bonds, replacing the probability distribution by a function like . In this kind of distribution the limit α → ∞ corresponds to the usual first neighbor bond case. In the other hand α = 0 corresponds to the well know "molecular field" situation. In this thesis we studied the behavior of Pc as a function of a to the bond percolation specially in d = 1. Our goal was to check a conjecture proposed by Tsallis in the context of his Generalized Statistics (a generalization to the Boltzmann-Gibbs statistics). By this conjecture, the scaling laws that depend with the size of the system N, vary in fact with the quantitie