Difração de policristais e difração múltipla de raios X para o estudo da influência dos íons Mn+2, Mg+2 e Cu+2 nas estruturas cristalinas da L asparagina monohidratada e do sulfato de níquel hexahidratado

Neste trabalho realizamos um estudo sobre a influência dos dopantes Mn⁺², Mg⁺² e Cu⁺² nas estruturas cristalinas de cristais de Sulfato de Níquel hexahidratado (NSH) e L Asparagina Monohidratada (LAM). A introdução de dopantes em uma rede cristalina pode alterar suas propriedades físicas ou seu hábito de crescimento. Estas alterações podem favorecer as aplicações tecnológicas destes cristas em diversas áreas como medicina, agricultura, óptica e eletrônica. Os cristais de NSH foram crescidos pelo método da evaporação lenta do solvente e dopados com íons de Mn⁺² e Mg⁺², resultando em cristais de boa qualidade. Realizamos medidas de Difração de raios X de policristais nos cristais puros e dopados e a partir dos resultados obtidos fizemos refinamentos, usando o método de Rietiveld, onde foi observado que os cristais dopados apresentavam a mesma estrutura tetragonal e grupo espacial que o cristal puro, havendo uma pequena mudança em seus parâmetros de rede e volume de suas células unitárias. Observamos que a introdução de dopantes causou alterações nos comprimentos das ligações e nos ângulos entre os átomos de níquel e oxigênio, isso pode explicar porque as temperaturas de desidratação dos cristais de NSH:Mg e NSH:Mn são maiores que a do NSH puro. Usamos a técnica de Difração Mútipla de raios X com radiação síncroton em diferentes energias na estação de trabalho XRD1, do Laboratorio Nacional de Luz Síncroton (LNLS) a fim de identificarmos possíveis mudanças nas estruturas dos cristais dopados de Sulfato de Níquel e de L Asparagina. Os diagramas Renninger mostram mudanças na intensidade, perfil e posições dos picos secundários dos cristais dopados causadas pela introdução dos dopantes. Os cristais de L Asparagina Monohidratada foram crescidos pelo método da evaporação lenta do solvente, sendo dopados com íons de Cu⁺². As medidas de difração múltipla mostram que o cristal dopado possui a mesma estrutura ortorrômbica que o cristal puro. Foram detectadas mudanças nas intensidades, assim como, nas posições e perfil de picos secundários no diagramas Renninger para o cristal dopado. Nossos resultados indicam que o mecanismo de incorporação dos íons de Cu⁺² na rede cristalina da L Asparagina Monohidratada ocorre de forma intersticial.

Uma leitura de 26 poetas hoje / A reading of 26 poetas hoje

Este trabalho procura identificar selecionadas produções poéticas da antologia 26 Poetas Hoje as faces da resistência indicada por Alfredo Bosi no ensaio “Poesia Resistência”. Do “grito de alarme” pessoal de poetas pertencentes a gerações diferentes, emerge uma poesia espontânea, autêntica e, sobretudo, resistente, como produto da renovação da expressão poética, impregnado de afetividades e de intimismo e que incorporou o coloquial e os recursos da grande poesia brasileira desde 22. This reading presents a sample from this anthology and tries to identify in it the faces of resistance indicated by Alfredo Bosi in his essay: “ Poesia Resistência”. In the several manners the poets of different generations chose for their personal cry of alert we find a poetry wich is spontaneous, authentic and, above all, “resistent”. This is due mainly to the renewal of the poetical expression, impregnated with affective ness and intimism, which included colloquial language and devices used by all great Brazilian poetry since the modernism of 1922.

Desenvolvimento de um sistema para monitoramento remoto em centrais de microgeração fotovoltaica

Pós-graduação em Agronomia (Energia na Agricultura) - FCA

In situ protocol for the detemination of dose-response effect of low-fluoride dentifrices on enamel remineralization

No in situ protocol has assessed the dose-response effects of fluoride dentifrices involving low-fluoride formulations. Objective: To assess the ability of an in situ remineralization model in determining dose-response effects of dentifrices containing low fluoride concentrations ([F]) on bovine enamel. Material and Methods: Volunteers wore palatal appliances containing demineralized enamel blocks and brushed their teeth and devices with the dentifrices supplied (double-blind, crossover protocol) separately for 3 and 7 days. Surface hardness (SH), integrated subsurface hardness (AKHN) and [F] in enamel were determined. Data were analyzed by ANOVA, Tukey's test and Pearson's correlation (p<0.05). Results: Dose-response relationships were verified between [F] in dentifrices and SH, AKHN and enamel [F]. Higher correlation coefficients between enamel [F] and SH and AKHN were obtained for the 3-day period. Significant differences in SH and AKHN were observed among all groups for the 3-day period, but not between 0-275, 275-550, and 550-1,100 mu g F/g dentifrices for the 7-day period, nor between 3- and 7-day periods for the 1,100 mu g F/g groups. Conclusions: Considering that the peak remineralization capacity of the conventional dentifrice (1,100 mu g F/g) was achieved in 3 days, this experimental period could be used in future studies assessing new dentifrice formulations, especially at low-fluoride concentrations.

O jogo simbólico livre e dirigido e as manifestações do juízo moral em crianças da educação infantil

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Formação do professor para o uso de tecnologia assistiva

The specialized teachers' training to work in multifunctional resource classrooms still has to reach a satisfactory level. These teachers are expected to keep a set of resources and devices used to teach a wide range of students with different disabilities. That fact leads to reflection by the academic community. Thus what specific content should such training address? This paper aims to analyze the set of resources and equipment in a classroom and infer the teaching knowledge underlying their use. The analysis was conducted by classifying 63 resources and equipment items, which led to three categories: 1) set of materials that do not require academic knowledge; 2) set of materials that require academic knowledge related to any training course for teachers; 3) set of materials that require specific academic knowledge on working with students with disabilities. It concluded that around 36% of the resources do not require academic knowledge to be used; 35% of these resources and equipment require some academic knowledge to be properly handled, and around 29% of these resources and equipment require specific academic knowledge of their content. For instance, a specific training of those resources is necessary for acting with students with severe communication disorders, multiple disabilities and visual impairment or deafness.

Image Re-Ranking Acceleration on GPUs

Huge image collections are becoming available lately. In this scenario, the use of Content-Based Image Retrieval (CBIR) systems has emerged as a promising approach to support image searches. The objective of CBIR systems is to retrieve the most similar images in a collection, given a query image, by taking into account image visual properties such as texture, color, and shape. In these systems, the effectiveness of the retrieval process depends heavily on the accuracy of ranking approaches. Recently, re-ranking approaches have been proposed to improve the effectiveness of CBIR systems by taking into account the relationships among images. The re-ranking approaches consider the relationships among all images in a given dataset. These approaches typically demands a huge amount of computational power, which hampers its use in practical situations. On the other hand, these methods can be massively parallelized. In this paper, we propose to speedup the computation of the RL-Sim algorithm, a recently proposed image re-ranking approach, by using the computational power of Graphics Processing Units (GPU). GPUs are emerging as relatively inexpensive parallel processors that are becoming available on a wide range of computer systems. We address the image re-ranking performance challenges by proposing a parallel solution designed to fit the computational model of GPUs. We conducted an experimental evaluation considering different implementations and devices. Experimental results demonstrate that significant performance gains can be obtained. Our approach achieves speedups of 7x from serial implementation considering the overall algorithm and up to 36x on its core steps.

Pluralidade cultural e educação física: elaboração de material didático

In 1997, the National Curriculum Parameters (BRASIL, 1997a) proposed the incorporation of the Transversal Themes in all of the knowledge areas. Specifically in the School Physical Education, the teacher working with transversality must stabilish bridges between the body culture practice with these themes. Promote this relationship is not a simple task and there are many problems that stuck the advance of this propose. So, thinking about making didactical formulat teaching stragies and think about the development of their practice. Another challenge is considerate as a beginning in the pedagogic activity the student’s knowledge and experience, as listening during the process of knowledge construction. In this way, the aim of this research is investigate the 8th and 9th grade of the primary school students conception about Cultural Plurality. After this, using the information taken gron the students, we are going to present subisidies to make a textbook, for the teachers and for students, with Physical Education activities possibilies with this Transversal Theme. Keeping in mind the aim of this research, we used the semi-structed interview as a instrument of data collection. The interview was made with 30 students of the 8th and 9th grade the primary school from two statual schools of Rio Claro city. The procediments were executed following the ethics comite requirements. In other to associate the Cultural Plurality with Physical Education, dance and physical adventure activities contents were selected. The results showed that the students know few thinks about this Transversal Themes, because they had apoor knowledge, according to National Curriculum Parameters. In scholar environment and Physical Education classes, there are many cases of prejudice and discrimination, mostly by the leack of ability. Nonetheless, most of the students are able to...(Complete abstract click electronic access below)

Organização curricular e novas tecnologias de ensino do atletismo na escola

Introdução: Atualmente a Educação Física Escolar vem passando por grandes mudanças como, por exemplo, a implementação de uma proposta curricular para as escolas da rede estadual de ensino. No entanto, a falta conhecimentos sob os temas abordados, faz com que os professores trabalhem apenas conteúdos que apresentam um maior domínio o que torna, muitas vezes, as aulas de Educação Física em aulas exclusivamente de esportes coletivos (futsal, basquetebol, voleibol e handebol), deixando de lado outros componentes da cultura corporal. Diante disso, esse trabalho propõe apresentar algumas possibilidades para o atletismo na escola, de modo a buscar a responder as seguintes questões. O que os alunos devem saber sobre o atletismo na escola? Quais valores o atletismo pode acrescentar para estes alunos? O que os alunos devem saber fazer do atletismo? Objetivo: O objetivo do presente trabalho foi apresentar uma proposta curricular de atletismo para as aulas de Educação Física na escola do 6°, 7°, 8° e 9° ano do Ensino Fundamental (3º ciclo). Essas informações foram extraídas de entrevistas realizadas com professores especialistas em Atletismo e Educação Física escolar. Além disso, buscou-se construir um vídeo didático, para o 6°ano, sobre a apresentação das provas do atletismo. Metodologia: A metodologia de pesquisa utilizada para este estudo foi do tipo qualitativa e descritiva, pois consistiu na entrevista com docentes especialistas em Educação Física escolar e/ou Atletismo, e na elaboração de material didático e audiovisual. Conclusão: Todos os entrevistados bem como as propostas curriculares, enfatizaram a importância se reconhecer todas as provas do Atletismo

Efeitos da experimentação no cotidiano letivo no ensino médio

In this work, it was studied the effects of the experimentation in the physics teaching. Beginning from the theoretic reference and discussions, the objective was prove the efficiency of researches of this nature related to two main aspects of a class: The aroused interest in the students and the facilitating action on the understanding of the theory. For such objective, using the comparison, it was chosen two distinct classes, but the more similar possible, so that, in one of them, it was showed a tradition class, lectures and in another, a class using experimentation to contemplate the theory. To manage a way to rate these aspects, it was made a conceptual questionnaire, requiring only concepts rather than mathematics and equations, besides specific interviews to rate the opinion of the student related to each method. The observations in classes and of the reactions of the students also were of a big value to analysis. After the experimental class completed, it may analyze and conclude some positive points related to experimental methods: As for the opinion of the students, the approval was big, and the majority opined to this class as being “more interesting”. On the point of view of learning, it had a sensitive improvement of grades, but with more mature answers, deep and autonomous, if looking at a general vision

Síntese de nanopartículas de sulfeto de cobre, preparação e estabilidade coloidal de fluidos trocadores de calor em meio aquoso

Pós-graduação em Química - IQ

Um estudo teórico e experimental de nanoestruturas de 'ZnS': propriedades físicas e químicas

Pós-graduação em Química - IQ

Laboratory testes with quality data in Dentistry

In laboratory tests, just following the manufacturer’s instructions of materials or equipments may not be enough to obtain reliable data. Thus, intra and inter-examiners studies may be required. The aim of this study was to illustrate the application of the Intraclass Correlation Coefficient (r) in a study related to the color changing and hardness of composite resin conducted by two examiners. The color and hardness of 10 specimens of composite resin were evaluated by a colorimetric spectrophotometer and hardness tester, respectively, at two different times. Two trained examiners performed two measurements with an interval of one week. Specimens were stored in artificial saliva at 37±1ºC for 7 days. The Intraclass Correlation was used for analysis of intra and inter-examiner reproducibility. The intra-examiner reproducibility was 0.79, 0.44 and 0.76 for L, a and b color coordinates for the examiner 1 and 0.84, 0.23, 0.21 for examiner 2. For hardness, r-values were 0.00 and 0.23 for the examiner 1 and 2, respectively, showing unsatisfactory agreement on color and hardness evaluation for both examiners. It was noted that only the observation of protocol for use of equipment and examiners training were not sufficient to collect reliable information. Thus, adjustments in the experimental protocol were made and devices were produced to standardize the measurements. The reproducibility study was performed again. For examiner 1, values as 0.90, 0.59 and 0.79 were verified for L, a and b coordinates and, for examiner 2 were obtained values of 0.90, 0.75, 0.95. In relation to hardness, r-values of 0.75 and 0.71 were obtained for examiners 1 and 2, respectively. The inter-examiner reproducibility was 0.86, 0.87, 0.91 for L, a and b coordinates and 0.79 for hardness. It was concluded that intra and inter-examiner calibration is essential for obtaining quality measurements in laboratory tests.

Diretrizes de conduta e tratamento de síndromes febris periódicas associadas à criopirina (Criopirinopatias–CAPS)

To establish guidelines based on cientific evidences for the management of cryopyrin associated periodic syndromes. The Guideline was prepared from 4 clinical questions that were structured through Pico (Patient, Intervention or indicator, Comparison and Outcome), to search in key primary scientific information databases. After defining the potential studies to support the recommendations, these were graduated considering their strength of evidence and grade of recommendation. 1215 articles were retrieved and evaluated by title and abstract; from these, 42 articles were selected to support the recommendations. 1. The diagnosis of Caps is based on clinical history and clinical manifestations, and later confirmed by genetic study. Caps may manifest itself in three phenotypes: FCAS (mild form), MWS (intermediate form) and Cinca (severe form). Neurological, ophthalmic, otorhinolaryngological and radiological assessments may be highly valuable in distinguishing between syndromes; 2. The genetic diagnosis with NLRP3 gene analysis must be conducted in suspected cases of Caps, i.e., individuals presenting before 20 years of age, recurrent episodes of inflammation expressed by a mild fever and urticaria; 3. Laboratory abnormalities include leukocytosis and elevated serum levels of inflammatory proteins; 4. Targeted therapies directed against interleukin-1 lead to rapid remission of symptoms in most patients. However, there are important limitations on the long-term safety. None of the three anti-IL-1β inhibitors prevents progression of bone lesions.

Materiais híbridos de sílica/orgânico dopados com rodamina-B: estudo da luminescência e preparação de filmes finos para aplicações em fotônica

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)