997 resultados para Sequências didáticas
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The use of multimodal neuroimaging techniques has been helpful in the investigation of epileptogenic zone in patients with refractory epilepsies. This work aims to describe an ictal event during EEG-fMRI performed simultaneously in a 39-year-old man with refractory epilepsy. The EEG data were recorded at a sampling rate of 5 kHz, using a BrainAmp (BrainProducts, München, Germany) amplifier, with 64 MR (magnetic resonance) compatible Ag/AgCl electrodes. MR images were acquired using a 3T scanner in 3 sequences of 6 minutes of echo-planar images (EPIs), with TR = 2s, being the last sequence stopped after the ictal event. The EEG was corrected for gradient and pulse artifacts using the Brain Vision Analyzer2 software (BrainProducts), and the functional images were realigned, slice-timing corrected, normalized and smoothed. The start of the ictal changes was used for the evaluation of the BOLD response in MR images, using a t-test with a minimum cluster of 5 voxels, p <0.005 (T>2.5). The patient had a partial complex seizure, as noted by neurologist. The fMRI data showed positive BOLD responses (activation) in dysplastic areas, but showed the most significant activation outside the lesion, in areas compatible with secondary spread of the epileptic focus, probably caused by motor reaction also observed during the seizure. As a conclusion, we note that the technique of EEG-fMRI can detect the epileptogenic zone in patients with refractory epilepsy, but areas of dissemination of primary epileptogenic focus may show significant activation, introducing additional difficulties to the interpretation of the results
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Brazil is nowadays the greatest bet of investors for the future due to its stable economy growth. The country has grown side by side with the greatest demand for electrical energy. The international appeal for renewable sources is causing a change in the Brazilian energetic matrix, raising the amount of energy generated by thermoelectric power plants. The construction of new power plants, running on biomass, requires a crescent number of capacitated personnel to run them. The Faculdade de Engenharia de Guaratinguetá – UNESP – has a steam laboratory; witch is deactivated, which has a thermoelectric plant of small capacity. The laboratory reactivation and the return of its activities can be an important tool in order to graduate engineer able to operate on such units. This paper proposes four new experiments to be simulated on the Collage’s Energy Dep. Steam Lab when it gets back to its educational activities
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Neste trabalho analisamos a experimentação didática no ensino de Ciências, discutindo possibilidades didáticas e implicações. Para tal, foi realizada uma pesquisa bibliográfica e análise da experiência didática pessoal da autora, num viés qualitativo de características autoetnográficas da atividade docente em si. Foram analisados os projetos de aulas de Ciências elaborados tendo em vista uma sala do 5º ano do ensino fundamental I, com diferentes estratégias didáticas, tendo como foco as experiências: (a) a construção de um terrário, (b) a construção de um filtro de água e (c) um experimento sobre erosão do solo e (d) a realização de um experimento sobre reciclagem. A análise permite considerar que a experimentação didática pode fomentar um ambiente mais lúdico, com possíveis implicações positivas para o interesse dos alunos pelo aprendizado de Ciências e, sobretudo, para o enriquecimento das atividades de ensino
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Leaf-cutting ants belonging to the genus Atta occur from the tropical to subtropical regions of the Americas. These insects are considered pests because they cause serious damage in agricultural areas. Among these, stands out Atta laevigata, species which the colony requires a huge amount of leaves to grow its symbiotic fungus which is the main food source of the nest. Thus, the study of the transcriptome of these ants becomes a useful tool, because it is possible to identify proteins potentially involved with their skills as insect pests and also those related to differences between the varieties present in the nests. In the present study we described results of the partial analysis of the transcriptome of the leaf-cutting ant pest A. laevigata, from cDNA sequences previously generated in the Laboratory of Evolution and Molecular (LEM). The results may also be used for molecular, ecological, metabolic and evolutionary studies about ants, and heterologous expression of important proteins as molecular targets for the control of some leafcutting agricultural pests.
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The objective of the present study was to compare parameters such as total time, number of episodes and mean duration of episodes of each wake-sleep cycle stage, and sequences of stages in electroencephalographic records scored in 10 and 30 seconds epochs in controls and sleep deprived animals, submitted to avoiding tasks of learning and memory. This comparing tried to discuss the need of lesser epochs in the EEG scoring, and of the search for more details and shorter sequences, present in many studies nowadays
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Dentre os reagentes alternativos, têm-se destacado o peróxido de hidrogênio, visando atender às demandas de produção de celulose ECF. Reagentes como cloro e dióxido de cloro reagem com a lignina residual, levando à formação de compostos organoclorados, fator negativo para as questões relacionadas ao meio ambiente. O fator kappa (FK) é determinante para a dosagem de dióxido de cloro em seqüencias de branqueamento que determinarão a alvura requerida e reduzirão a formação de compostos organoclorados no licor residual. O presente estudo avaliará o efeito da lignina residual através do número de permanganato, após o estágio D1, no branqueamento com peróxido de hidrogênio. Foram realizados cinco branqueamentos de polpas iguais por seqüências ECF em ensaios laboratoriais, variando-se o fator kappa entre eles. O branqueamento foi realizado com uma polpa kraft de eucalipto, prédeslignificada com oxigênio, utilizando a quantidade de reagentes requeridas para cada estágio, em sacos de polietileno e mantidas em banho de vapor com controle de temperatura pelo tempo requerido. A seqüência D(E+P)DP proposta foi comparada com a seqüência D(E+P)DD. Os métodos utilizados para realizar este estudo são os de procedimento padrão conforme as normas TAPPI e CPPA para branqueamento em laboratório de polpa celulósica. Foram avaliados os parâmetros de qualidade da polpa branqueada com os valores de alvura, viscosidade, número kappa, número de permanganato, reversão de alvura e custo do processo de branqueamento e a influência do fator kappa sobre cada uma das condições propostas. Os resultados foram interpretados com base para as polpas que atingiram a alvura objetivo de 90 %ISO. Verificou-se que o FK ideal obtido foi de 0,20 para as seqüências avaliadas. A lignina residual afetou negativamente o branqueamento de todas as sequências, sendo a sequência D(E+P)DP com FK de 0,20 e carga ...
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AC Biosusceptometry (ACB) is a low-cost biomagnetic tool that has been successfully applied on pharmaceutical research to evaluate performance of solid dosage forms. The aim of this work was to evaluate the Horn & Shunck method to access tablet disintegration. To evaluate the HS results was record on video a test with a objet moving in a rail with a constant velocity. The desintegration was recorded on video and ACB, which used have seven pairs of detection coils and a pair of excitation coils to mensure the magnetic ux variation. The signals were ampli ed and digitalized to create images, which were restored by Wiener lter, while the video images are converted to gray scale, both are normalized and binarized and had the optical ow estimation calculated by Horn & Schunck (HS) algorithm. All signals and images are processed and developed algorithm on Matlab. During the tests the ve tablets (500mg ferrite, 375mg excipients, compression 10 to 50 kN) were on a becker between of the ACB system and of the video system, and only touching the surface of the water. With all OF maps calculated was realized the sum of the resultants of each, to get a disintegration process resultant for each compression. Whit that was possible observed the disintegration behaves. For the compression force study the HS components of each sequence was sum, take mean and normalized for sequence's max modulo, therefore can be observed a high growing on less compression tablets. We can conclude the HS algorithm is viable to tablets disintegration data collection and whit that was possible to create a tablets disintegration analyzes protocol, which would be useful on desintegration kinetics study
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When I set out to attend degree in mathematics was because I believed that mathematics could be taught to students in a way closer to their daily lives, thereby making it a more attractive school discipline, gradually, eliminating its reputation of a difficult school subject. Then, during my observations in supervised, I realized that one of the greatest difficulties in mathematics was related with geometry, in which the concepts of area and perimeter were often confused. Using the methodological tool of problem solving, something to bring the concept to be developed and the cultural context in which the student is in, I developed some educational activities in which, using concrete materials, students were encouraged to construct their own knowledge about the concepts of area and perimeter. Moreover, such activities were designed to place the student as the center of attention in the classroom. The main objective of this work is to encourage and observe how this methodology, based on the solving problem process, can be used within the classroom, to better understand the concepts to be taught, always looking for improvement of the student learning
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Os Parâmetros Curriculares Nacionais (PCNs), indicam que o ensino de ciências deve contribuir com eficiência para o desenvolvimento de uma sociedade mais esclarecida, que consiga compreender os avanços científicos e tecnológicos do mundo. Com isso, o ensino das ciências naturais pode ser articulado, apresentando-se de forma interdisciplinar, pois abrange aspectos da Física, Química, Biologia, incluindo Ciências Sociais e Tecnológicas. Focado nessa proposta, esse trabalho tem como finalidade disponibilizar ao professor de Ensino Fundamental aulas experimentais e práticas para serem utilizadas nas escolas. Consiste em uma lista de experimentos, entre outras práticas, organizados segundo os Eixos Temáticos previstos no PCNs. As práticas selecionadas se apropriam de materiais simples, de fácil obtenção e custo reduzido, podem ser realizadas tanto em ambiente laboratorial como em sala de aula, viabilizando sua utilização. Todos os experimentos foram extraídos de diferentes fontes de pesquisa: livros didáticos, apostilas didáticas e da Rede Internacional de Telecomunicação (Internet). Espera-se com esse material que o professor encontre um suporte para auxilio em aulas práticas, que proporcione ao aluno, atividades dinâmicas, facilitando a interação do educando com o conhecimento, atingindo o principal objetivo, a aprendizagem
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We discuss in the work the importance of experiential activities for Physics Teaching in the first years at Elementary Education. For this we start from the experience provided by the Teaching Project Initiation under Pibid CAPES, linked to the Department of Education from the Institute of Biosciences and activities of the Graduate Diploma in Physics Supervised, at Rio Claro Campus, São Paulo State, in partnership with Basic Education schools of the city. Based on some patterns and studies on the Teaching of Science in Elementary Education and particularly in the Ferreira’s work with Instrumentation for Physics Teaching, Electrostatic was chosen as base theme. We opted for the use of didactic experiments that provided in its construction the utilization of low cost materials, easy access and portability. Teaching strategies were aimed at inserting experiential activities during Elementary School I (first and third years of elementary school), intending to rescue the trial of Physics Education and Science for Basic Education. These experimental teaching activities were analyzed in this paper from the perspective of playfulness. We argue that experimentation with recreational attributes when properly used provides the interaction of individuals with the knowledge of Physical Sciences
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This research project aims to determine the main way that the inclusion of topics of history and philosophy of science education activities aimed at high school, influence the process of teaching and learning of chemistry. The subject of research will be a teacher, undergraduate student in chemistry and public school students that the teaching units developed will be applied. The literature presents a large of research indicating the need to include these topics in education and present the results of large withdrawals of original sources of the development of scientific knowledge. Despite of the large number of these works are not very common reports of application of the results of these studies on activities of the classroom, which reinforces the importance of this study
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A espécie Prochilodus lineatus, considerada um migrador por excelência, possui intensa ocorrência durante a migração reprodutiva. São peixes de elevado valor econômico e a sua adaptação em cativeiro os tornam altamente interessantes para desenvolvimento de programas de piscicultura. O monitoramento regular das variações genéticas nos estoques é importante em programas de conservação, evitando o declínio da variabilidade genética, essencial para a conservação das espécies. No entanto, os poucos dados moleculares populacionais para Prochilodus lineatus justificam a presente proposta. Nesse sentido, tivemos como objetivo caracterizar a variabilidade genética e estabelecer as relações filogeográficas entre 6 populações de P. lineatus das bacias dos rios Paraguai (2 do rio Paraguai e 3 do rio Cuiabá, MT) e Paraná (1 do rio Mogi-Guaçu, SP), num total de 34 indivíduos. Outros 16 indivíduos dos rios: da Prata, Uruguai, Paraná, Bermejo, Paraguai, Amazonas e Madeira, cujas sequências foram obtidas do National Center for Biotechnology Information (Genbank), foram analisados, totalizando assim, 50 indivíduos. Como grupo externo foi utilizado Salminus brasiliensis. O estudo foi realizado através das análises das sequências do gene mitocondrial ATPase 8/6. O interesse do uso de um gene mitocondrial está na vasta literatura que esse possui em análises filogenéticas e na confiança que existe nos dados gerados de tais análises. O gene citado foi completamente sequenciado (842pb), as análises filogenéticas foram conduzidas pelos métodos “Neighbor Joining (NJ)”, “Minimum Evolution (ME)” e “Máxima Parcimônia (MP)”, com 1000 réplicas de bootstrap no programa MEGA 5.0. Para análises filogeográficas as sequências foram analisadas no programa TCS e no programa Arlequin. Os resultados auxiliarão em uma melhor compreensão da história evolutiva, migração... (Resumo completo, clicar acesso eletrônico abaixo)
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O presente trabalho trata de uma Avaliação Pós Ocupação (APO) e uma avaliação da percepção ambiental dos usuários do Lar Escola Santa Luzia para Cegos, localizado na cidade de Bauru-SP. De maneira geral, a percepção humana tende a valorizar e utilizar mais o sentido da visão, porém é de extrema importância que os demais sentidos sejam também explorados. Por não ter o sentido da visão o deficiente visual desenvolve mais os outros sentidos, aguçando-os, o que lhe permite vivenciar experiências únicas de diferentes sensações. A arquitetura, como forma de arte, deve buscar não apenas ser “vista”, mas sim experimentada, pelo tato, olfato, audição, sensações térmicas, entre outros fatores cognitivos. A pesquisa se constituiu do levantamento de dados sobre o funcionamento da entidade, dos aspectos técnicos, funcionais e da percepção que os usuários têm do ambiente, e a maneira que se relacionam e se comportam nele. A APO, através de visitas exploratórias, dados coletados e entrevistas com usuários, nos permite conhecer as necessidades e opiniões das pessoas que vivenciam o espaço diariamente. As avaliações de percepção nos levam ao conhecimento do mundo sensitivo dos deficientes visuais, de que maneira seus sentidos atuam para que se localizem e se movimentem em edifícios, ruas e na cidade em geral. Como resultado final uma proposta projetual foi desenvolvida a fim de criar um espaço onde os deficientes visuais possam realizar atividades de convivência, culturais e didáticas de maneira adequada
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The state of São Paulo has four main drainages: Paraná river, Paraíba do Sul river, Ribeira do Iguape river and coastal rivers. The Paraíba do Sul river is born in Sao Paulo and drains an important range of land east of the state. Its ichthyofauna has some similarities and many differences from the continental and coastal drainages which highlights the importance of this study. Surveys conducted in the ichthyofauna of this basin, as in other large river basins in Brazil, is still incomplete. Moreover, there is no consensus about the taxonomic status of many species listed in these surveys. Considering the promising use of DNA barcode as a global system for species identification, the present study is aimed to establishing an inventory of the ichthyofauna of the São Paulo portion of the river Paraíba do Sul and simultaneously build a DNA barcode reference sequence library for fish found. Were obtained and analyzed 354 sequences of the gene cytochrome oxidase c subunit I (COI) belonging to 66 species of São Paulo portion of the Paraíba do Sul river. The average K2P distance between individuals within species of this basin was 0.48%, and 9,87% between species within a genus. Five pairs of species (10 species) showed low levels of interspecific genetic divergence (<2%),but all could be correctly identified. This study showed that the fish species analyzed could be identified efficiently through the use of barcode generating data that can provide information for further studies of this fauna, besides contributing to the global initiative to characterize the species of fish in the world of a molecular point of view. Five pairs of species (10 species) showed low levels of interspecific genetic divergence (<2%), but all could be correctly identified. This study showed that the fish species analyzed could be identified efficiently through the use of barcode generating data that can provide subsidies for further studies in this fauna, as well as ...
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This work offers an overview about didactic reflections in the introduction of the electrical field concept in Physics Teaching activities aimed to the High School by means of a teaching methodology based in a low cost experiment (FERREIRA E RAMOS, 2008). We analyzed the particular use of an experiment named electrostatic vector and its use in the teaching of the line force ideas, proposed by Faraday in 19th century. In the frame of this work we analyzed how this unconventional approach differs of the methodology generally presented in the didactic textbooks. We discussed that the use of low cost experiments, will not cause the student to learn, but the work of the teacher, offering an interaction between the student and the electrostatic vector, play an important role in the classroom