998 resultados para Reconstrução paleoambiental
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The Hegelian philosophy is presented as a progress in relation to other philosophies and it offers to take in itself all the other demonstrations. Thereby, Hegel intends to carry out his philosophical effort towards the establishment of a philosophical system. It is a comprehension recognized and exposed by Hegel in his doctoral thesis, i.e., that philosophy only becomes possible as a system. In this sense, the treatment dispensed to each one of his works necessarily evokes a relationship with all other. An work taken in isolation gets the feeling that something else should be presented, however, every work written by Hegel also contemplates a relation with his other works. In this sense, the objective here is to considerate Hegel’s Philosophy of Law in his philosophical system seeking to explicit its specific place, as well as its transit among the works of the thinker as a whole. The Philosophy of Law finds its particular moment in the ambit of the objective spirit or during the subjective spirit’s effectuation. However, it is assumed here the perspective that the Philosophy of Law represents, as the objective spirit does, a moment of mediation as well as a there-being whereby the absolute spirit’s effectuation would happen. Furthermore, Hegel’s Philosophy represents the presentation of what he considers as extremely important in philosophy, that is precisely, the need to sublate the separation between man and the world. It is not enough for Hegel, the affirmation of the being and the thinking in itself, but it is required to confirm them in their being other that will be evinced being itself. Thus, Philosophy is given as a reconstruction or as the factual knowledge as a science ceasing to be so only love of learning. This means in other words that philosophy deals with the world, in the world and for the world being much more than a speech to the world to be the talk of the world itself. If philosophy is the owl of Minerva who always arrives late, she does it for the reasons of the other to be recognized.
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Para a recuperação da estética facial,há necessidade de reposição do volume orbitário perdido em decorrência de eviscerações ou enucleações. Este estudo foi realizado com os objetivos de avaliar comparativamente a biocompatibilidade e a manutenção do volume orbitário com o uso de esferas de hidroxiapatita sintética e de polietileno poroso, na reconstrução de cavidades evisceradas de coelhos. Métodos: Para isso foram utilizados 56 coelhos albinos, submetidos à evisceração do olho direito, com colocação de esferas de hidroxiapatita sintética (G1 – 28 animais) ou polietileno poroso (G2 – 28 animais).Quatro coelhos de cada grupo foram sacrificados em 7 momentos experimentais: 7, 15, 30, 60, 90, 120 e 180 dias após a evisceração. Após o sacrifício, o conteúdo da cavidade orbitária direita foi removido e seccionado na porção central em duas hemi-metades,uma das quais foi preparada para exame histopatológico; exame ultra-estrutural em microscópio eletrônico de varredura foi feito em dois animais de 7, 60 e 180 dias, de ambos os grupos experimentais. Resumo 118 Resultados: Observou-se aos 7 dias, tecido conjuntivo frouxo, constituído de células inflamatórias e hemáceas, em meio à rede de fibrina, principalmente na periferia da esfera de hidroxiapatita e chegando até ao centro da esfera de polietileno; a reação tecidual tornou-se mais densa com o passar do tempo. Decorridos 60 dias, observou-se em G1, início de metaplasia óssea que se acentuou ao longo do experimento. Em todos os momentos experimentais, a inflamação,predominantemente macrofágica, foi muito mais acentuada em G1.O volume da cavidade esclero-corneana foi melhor mantido em G2. Conclusão: a esfera de hidroxiapatita sintética provoca mais inflamação que a de polietileno poroso e é menos eficiente na manutenção do volume orbitário... (Resumo completo, clicar acesso eletrônico abaixo)
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The fracture surfaces express the sequence of events of energy release due to crack propagation by linking the relief of the fracture to the loading stresses. This study aims to evaluate the heterogeneity of the critical zone for the advancement of the crack along its entire length in a thermoset composite carbon fiber and epoxy matrix, fractured in DCB testing (Double Cantilever Beam) and ENF (End-Notched Flexure). Investigations were made from image stacks obtained by optical reflection of extended depth from focus reconstruction. The program NIH Image J was used to obtain elevation map and fully focused images of the fracture surface, whose topographies were quantitatively analyzed. The monofractal behavior for DCB samples was assessed as being heterogeneous along the crack front and along the crack for all the conditionings. For the samples fractured in ENF test, there was a strong positive correlation to the natural condition, considering the fibers at 0° for the monofractal dimension and structural dimension (Df and Ds). For fibers at 90° to crack propagation, there was a moderate positive correlation for the textural dimension of natural condition. However, for the samples under ultraviolet condition and those subjected to thermal cycles, there was no correlation between the fractal dimension and fracture toughness in mode II
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O processo de modernização da agricultura brasileira provocou sérios danos ao meio ambiente. Nos últimos anos foram formuladas e implementadas algumas políticas públicas voltadas à promoção do desenvolvimento rural, com base em ações inovadoras e com a participação de novos agentes sociais. A descentralização políticoadministrativa promovida pela Constituição Federal promulgada no ano de 1988 criou as condições institucionais para que tais ações fossem empreendidas. O Programa de Microbacias, surge nesse contexto, inicialmente nos estados do Paraná e de Santa Catarina, sendo posteriormente implementado no Estado de São Paulo, em razão dos bons resultados apresentados no sul do país. No Estado de São Paulo, o referido programa visou combater os problemas decorrentes do processo de modernização da agricultura. Constituíram objetivos do Programa Estadual de Microbacias Hidrográficas, o combate à erosão e aos ravinamentos, o estímulo ao manejo adequado dos recursos naturais nas pequenas propriedades rurais e a organização dos agricultores em associações. As ações foram parcialmente financiadas pelo Banco Internacional para Reconstrução e Desenvolvimento (BIRD – Banco Mundial) e executadas pela Coordenadoria de Assistência Técnica Integral (CATI) em parceria com os municípios. A CATI, órgão gerenciador teve como objetivo atender mais de 90 mil produtores rurais em todo o Estado em mais de 1500 projetos de microbacias. Foram atendidos 70 mil produtores rurais, distribuídos em 514 municípios, perfazendo 996 microbacias hidrográficas trabalhadas. No município de Caiuá foram disponibilizados R$ 483.819,01 por meio do referido programa para atender a 104 proprietários na microbacias do Caiuazinho com R$ 255.018,3 e na do Córrego Água da Invernada com R$ 228.800,71, totalizando 80 produtores... (Resumo completo, clicar acesso eletrônico abaixo)
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The representation of real objects in virtual environments has applications in many areas, such as cartography, mixed reality and reverse engineering. The generation of these objects can be performed through two ways: manually, with CAD (Computer Aided Design) tools, or automatically, by means of surface reconstruction techniques. The simpler the 3D model, the easier it is to process and store it. However, this methods can generate very detailed virtual elements, that can result in some problems when processing the resulting mesh, because it has a lot of edges and polygons that have to be checked at visualization. Considering this context, it can be applied simplification algorithms to eliminate polygons from resulting mesh, without change its topology, generating a lighter mesh with less irrelevant details. The project aimed the study, implementation and comparative tests of simplification algorithms applied to meshes generated through a reconstruction pipeline based on point clouds. This work proposes the realization of the simplification step, like a complement to the pipeline developed by (ONO et al., 2012), that developed reconstruction through cloud points obtained by Microsoft Kinect, and then using Poisson algorithm
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Hepatitis C is a disease that affects approximately four million Brazilians. It is a rare disease with symptoms but with a treatment that involves marked secondary effects. The silence of their symptoms, however, socially projected, build the social imaginary figures that send feelings and prejudices, being born therefore the social stigma. This situation fundamentally affects the welfare of their subjects. In this aspect, this research traces a parallel between the situation experienced by patients with hepatitis C and the use for these individuals from the World Wide Web and its interactive tools on overcoming limits the disease and in the reconstruction of their social identities.
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In civil engineering, a structure is the whole sustainment of a construction and, thus, it is important that it remains intact throughout its lifetime. An engineering construction must last for decades without losing its functionality. However its purpose may be altered and several times the original structure does not meet the new needs of use. Still, in new buildings, the functionality is altered due to possible flaws in execution and the structure, invariably does not reach the desired solicitation needs. In cases like this, the commonly adopted solutions are, basically, the demolishment followed by the reconstruction of the desired mold or the structural reinforcement. This second option, for long years, has not been put to practice due to certain factors such as the high costs for its implantation, use of inadequate reinforcement execution techniques, and the culture of people involved in the area regarding its use and, in this case, the option would always be the reconstruction. Thoughtout the years, some techniques were developed to allow the execution of structural reinforcements with low costs and in efficient ways. An interesting, fast, efficient and economical technique is the structural reinforcement through metal sheets put together with epoxy resin that can be applied in beams, slabs and pillars. In the present work the different behavior of beams reinforced with this technique. Steel is a very recommended material for these reinforcements due to its characteristics related to traction, compression and the effectiveness of the technique related to its cost. For the attachment the epoxy resin is recommended, since it allows the joining of two materials, in this case, steel and concrete. The efficiency of this union is so considerably high that it rarely produces any flaws in adherence and, normally, when it happens it is due to problems in the execution process, not in the union of materials
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For the development of this graduate work of fractal fracture behavior, it is necessary to establish references for fractal analysis on fracture surfaces, evaluating, from tests of fracture tenacity on modes I, II and combined I / II, the behavior of fractures in fragile materials, on linear elastic regime. Fractures in the linear elastic regime are described by your fractal behavior by several researchers, especially Mecholsky JJ. The motivation of that present proposal stems from work done by the group and accepted for publication in the journal Materials Science and Engineering A (Horovistiz et al, 2010), where the model of Mecholsky could not be proven for fractures into grooved specimens for tests of diametric compression of titania on mode I. The general objective of this proposal is to quantify the distinguish surface regions formed by different mechanisms of fracture propagation in linear elastic regime in polymeric specimens (phenolic resin), relating tenacity, thickness of the specimens and fractal dimension. The analyzed fractures were obtained from SCB tests in mode I loading, and the acquisition of images taken using an optical reflection microscope and the surface topographies obtained by the extension focus method of reconstruction, calculating the values of fractal dimension with the use of maps of elevations. The fractal dimension was classified as monofractal dimension (Df), when the fracture is described by a single value, or texture size (Dt), which is a macroscopic analysis of the fracture, combined with the structural dimension (Ds), which is a microscopic analysis. The results showed that there is no clear relationship between tenacity, thickness and fractal values for the material investigated. On the other hand it is clear that the fractal values change with the evolution of cracks during the fracture process ... (Complete abstract click electronic access below)
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During the last centuries, the human being have been considered the center of the universe. The man believed that nature was at his disposal. Appropriated their processes, their cycles changed, redefined their spaces. Today, when faced with an environmental crisis which threatens the planet life, including the human life, the Science Education can contribute to a reconstruction of man-nature relationship in other terms. The transformation of teaching practices in the school environment, to be reflective, it is still a process that challenges the vast majority of teachers. As has been indicated by Guerra (2004), among others, the traditional teaching of content delivery is still very strong and certainly more deeply embedded in ideas and activities of the teachers who focus on environmental education. With it, a theory and pedagogical discourses in critical-reflexive actions is still a major obstacle. Therefore, new proposals for education and continuing education activities need to be formulated and presented based on the characteristics and needs breathing. Therefore propose changes in the way of teaching, where there is more room for a theory and praxis alone or with a only scientific truth. The scenery of society requires that knowledge is constructed to interconnect all disciplines, joining theory and practice so we can understand the whole and their relations in an integrated manner. It was proposed here a way to build a school and applying theoretical and practical activities involving experimental and seeking to meet the principles of Environmental Education for the training of citizens aware and critical. At the same time cares to use textbooks very rich in its pedagogical character that are present in schools and often are, forgotten and unused by teachers. From this way, I chose to Experimentoteca, ...(Complete abstract click electronic access below)
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Diante do processo de degradação do meio ambiente e da crise social que permeia a relação sociedade-natureza fragmentada, hierarquizada, consideramos a Educação Ambiental (EA) como potente instrumento de contraposição e intervenção aos atuais paradigmas de nossa sociedade. Frente a este contexto acreditamos que o processo educativo deve trazer articulado para as práticas educativas as dimensões dos conhecimentos relacionados à sociedade e natureza, aos valores éticos, estéticos e participação política. Reconhecendo a ligação entre essas três dimensões, focalizaremos para esse estudo, entretanto, a dimensão valorativa, necessária ao se propor a construção e reconstrução de novos valores desejáveis no âmbito socioambiental. Dessa forma, percorremos em nossa investigação espaços compartilhados por dezesseis professores das séries finais do ensino fundamental da rede pública do estado de São Paulo, que se envolveram em um programa de formação docente junto ao projeto de extensão Educação Ambiental e o Trabalho com Valores realizado em 2010. Nesse caminho, procuramos investigar a partir dos diálogos empreendidos entre esses professores, o processo da construção da prática docente junto à dimensão valorativa da temática ambiental. Buscamos apontar as possibilidades e os possíveis desafios que se estabeleceram no momento da elaboração do plano de ensino que deveria ser posteriormente desenvolvido na rede básica do estado de São Paulo. Os possíveis espaços de contestação que implicaram na contraposição do modelo dominante e que puderam se fortalecer mediante essa experiência formativa durante o projeto de extensão, bem como as possibilidades e limites oferecidos pela escola para sua realização foram alvo de nossa pesquisa. Para tanto, a investigação se desenvolveu com base na abordagem de pesquisa qualitativa, sob uma perspectiva bakhtiniana
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The Therapy with proton beam has shown more e ective than Radiotherapy for oncology treatment. However, to its planning use photon beam Computing Tomography that not considers the fundamentals di erences the interaction with the matter between X-rays and Protons. Nowadays, there is a great e ort to develop Tomography with proton beam. In this way it is necessary to know the most likely trajectory of proton beam to image reconstruction. In this work was realized calculus of the most likely trajectory of proton beam in homogeneous target compound with water that was considered the inelastic nuclear interaction. Other calculus was the analytical calculation of lateral de ection of proton beam. In the calculation were utilized programs that use Monte Carlo Method: SRIM 2006 (Stopping and Range of Ions in Matter ), MCNPX (Monte Carlo N-Particle eXtended) v2.50. And to analytical calculation was employed the software Wolfram Mathematica v7.0. We obtained how di erent nuclear reaction models modify the trajectory of proton beam and the comparative between analytical and Monte Carlo method
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The present study evaluated the use of semicircular bending test (SCB) as an alternative to conventional bending test to examine the effect of thermal shock. Still, studies the behavior of fracture surfaces generated by monofractal behavior analysis, which allows us to evaluate the contributions of the microstructure and the mechanical context in forming reliefs during the crack propagation. The fractal analysis is made from elevation maps obtained by reconstruction method by extension of the focus stacks of digital images acquired in microscope. The specimens used were samples semicircular pressed TiO2 (rutile) with and without heat shock, prepared for testing mode I loading. Were also produced, specimens in the form of bars for Weibull statistical analysis. From the three-point bending test, we found the variation of fracture toughness between the samples after the heat shock and natural condition. The SCB test was feasible for the analysis of thermal shock resistance. The results showed that the value of the fracture toughness decreases as the heat shock treatment
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A utilização de programas computacionais específicos como ferramentas para análise estatística em identificação humana e de vínculos genéticos tem se tornado imprescindível, principalmente em casos de maior complexidade ou em grande escala. A análise de casos em que há genealogia incompleta gera resultados inconclusivos tornado os cálculos estatísticos mais laboriosos, consumindo tempo e pessoal qualificado. Os objetivos desse estudo são: o estudo simulado de casos reais de identificação humana e vínculos genéticos em situações especiais (meios irmãos na ausência dos pais, reconstrução), utilizando programas computacionais livres de cálculos estatísticos como ferramenta; a verificação do melhor programa livre de análise estatística disponível para utilização nos centros públicos brasileiros; e o levantamento estatístico dos casos reais brasileiros (vínculos genéticos, negatória, exclusão) para se obter uma visão da realidade brasileira em relação às suas relações familiares. Os principais métodos foram: análise das informações contidas nas fichas de registro e documentos anexados aos exames de vínculo genético dos participantes; e inserção nos softwares dos resultados de perfis genéticos obtidos de diferentes casos, de acordo com as especificações de uso. A amostra populacional dos casos analisados nesse trabalho incluiu 3.871 indivíduos. Em relação aos casos reais brasileiros, o exame de vínculo genético mais requisitado foi o de paternidade tipo trio; 68% dos casos incluíram o suposto pai como o pai biológico e 27% dos supostos pais estavam registrados na certidão de nascimento do filho e requisitaram o exame de paternidade para confirmá-la. A taxa de mutação encontrada variou de 0,4 a 2 x 10-3 per locus per gamete per generation. Após os estudos simulados... (Resumo completo, clicar acesso eletrônico abaixo)
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In the recent years, the use of proton beams in radiotherapy has been an outstanding progress (SMITH, 2006). Up to now, computed tomography (CT) is a prerequisite for treatment planning in this kind of therapy because it provides the electron density distribution required for calculation of dose and the interval of doses. However, the use of CT images for proton treatment planning ignores fundamental differences in physical interaction processes between photons and protons and is, therefore, potentially inaccurate (SADROZINSKI, 2004). Proton CT (pCT) can in principle directly measure the density distribution needed in a patient for the dose distribution (SCHULTE, et al, 2004). One important problem that should be solved is the implementation of image reconstruction algorithms. In this sense, it is necessary to know how the presence of materials with different density and composition interfere in the energy deposition by ionization and coulomb excitation, during its trajectory. The study was conducted in two stages, was used in both the program SRIM (The Stopping and Range of Ions in Matter) to perform simulations of the interaction of proton beams with pencil beam type. In the first step we used the energies in the range of 100-250 MeV (ZIEGLER, 1999). The targets were set to 50 mm in length for the beam of 100 MeV, due to its interaction with the target, and short-range, and 70 mm for 150, 200 and 250 MeV The target was composed of liquid water and a layer of 6 mm cortical bone (ICRP). It were made 9 simulations varying the position of the heterogeneity of 5 mm. In the second step the energy of 250 MeV was taken out from the simulations, due to its greater energy and less interaction. The targets were diminished to 50 mm thick to standardize the simulations. The layer of bone was divided into two equal parts and both were put in the ends of the target... (Complete abstract click electronic access below)
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)