Medições e análise de desvanecimento aplicado à HAPS

Trabalho de Conclusão Curso (graduação)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Elétrica, 2019.O principal objetivo desta tese é obter dados empíricos da potência de um sinal de internet em 2.45 GHZ, processá-los e analisá-los. A meta da análise é comparar os dados empíricos com funções de densidade de probabilidade (PDF) e de distribuição acumulada (CDF), dada pelos modelos de distribuição log-normal e κ − μ para a caracterização de desvanecimento em larga escala ou, mais especificamente, o sombreamento. A montagem do experimento tentou se aproximar de um modelo em menor escala de HAP (Plataformas de Alta Altitude) e buscou uma caracterização aproximada para esse tipo de enlace. Portanto, esse trabalho descreve o experimento realizado, os resultados númericos obtidos e suas análises.The main objective of this thesis is to obtain empirical power data from a 2.45 GHz internet signal, process it and analyze it. The analisis’ goal is to compare empirical data with theorical probability density functions (PDF) and cumulative distribution functions (CDF), given by the log-normal and a κ−μ distribution models for the caracterization of large scale fading or, more especifically, the shadowing. The mounting of this experiment aimed to build a small scale HAP (High Altitud Platform) and aimed at a aproximate caracterization for this kind of link. Therefore, this work describes the experiment done, the numerical results obtained and its analisis

EDUCAÇÃO BÁSICA QUILOMBOLA E A LUTA DE SANTA ROSA DOS PRETOS POR DIREITOS ÉTNICOS: a aplicação da Resolução CNE/CEB nº 8/2012 na U.E.B. Quilombola Elvira Pires

Estudo sobre a Educação Básica Quilombola e a Luta de Santa Rosa dos Pretos por Direitos Étnicos. Indagou como problema de pesquisa em que medida as Diretrizes para Educação Básica Quilombola na Unidade de Ensino Básico Quilombola Elvira Pires se relacionam com as lutas por direitos étnicos do povo do Quilombo de Santa Rosa dos Pretos. Objetivou, de forma geral, analisar a aplicação das Diretrizes para Educação Básica Quilombola na Unidade de Ensino Básico Quilombola Elvira Pires e sua relação com as lutas por direitos étnicos do povo do Quilombo de Santa Rosa dos Pretos. Metodologicamente, utilizou pesquisa bibliográfica aportada em autores do direito, da sociologia e da antropologia; da pesquisa documental para o estudo de legislações nacionais e internacionais que asseguram direitos a comunidades quilombolas, em especial da Resolução CNE/CEB nº 8/2012; e pesquisa de campo através de conversas livres e entrevistas semiestruturadas. Concluiu que as Diretrizes para Educação Básica Quilombola não são aplicadas na U.E.B. Elvira Pires e que a sua aplicação seria de suma importância para a resistência quilombola de luta de Santa Rosa dos Pretos, a partir do fortalecimento da identidade, práticas culturais e territorialidade.

A Deficiency Problem of the Least Squares Finite Element Method for Solving Radiative Transfer in Strongly Inhomogeneous Media

The accuracy and stability of the least squares finite element method (LSFEM) and the Galerkin finite element method (GFEM) for solving radiative transfer in homogeneous and inhomogeneous media are studied theoretically via a frequency domain technique. The theoretical result confirms the traditional understanding of the superior stability of the LSFEM as compared to the GFEM. However, it is demonstrated numerically and proved theoretically that the LSFEM will suffer a deficiency problem for solving radiative transfer in media with strong inhomogeneity. This deficiency problem of the LSFEM will cause a severe accuracy degradation, which compromises too much of the performance of the LSFEM and makes it not a good choice to solve radiative transfer in strongly inhomogeneous media. It is also theoretically proved that the LSFEM is equivalent to a second order form of radiative transfer equation discretized by the central difference scheme

Alcance e limites do ativismo do Ministério Público como fiscal da educação

Is the Prosecution Service (PS) able to enforce rights as a government inspector without the Judiciary? The question arises for the PS for Education (MPEduc) project, created to urge municipalities and states to adjust schools to legal requirements and encourage inspection by social councils. To capture the scope and limits of PS activism, we combine database analysis, interviews with those involved in the project, and documentary analysis. This paper shows that out of 371 local projects, around 40% completed up to two of the seven phases planned and 6.1% were completed. MPEduc case studies with fewer and more formal advances (Vitória and Belford Roxo) point out limits to the PS’s activism and the origins and effects of the high discretion and autonomy of the members, so associated with the institution. O Ministério Público (MP) é capaz de efetivar direitos como fiscal de governos sem o Judiciário? A questão se põe ao projeto MP pela Educação (MPEduc), criado para instar municípios e estados a adequarem escolas a exigências legais e fomentar a fiscalização por conselhos sociais. Para captar alcances e limites do ativismo do MP, combinamos a análise de banco de dados, entrevistas com envolvidos no projeto e análise documental. Detectamos que de 371 projetos locais, cerca de 40% fizeram até duas das sete fases previstas e 6,1% foram concluídos. Estudos de casos do MPEduc com menos e mais avanços formais (Vitória e Belford Roxo) indicam limites do ativismo do MP e efeitos das altas discricionariedade e autonomia dos membros, tão associadas à instituição

A experiência do bullying por pessoas com deficiência no contexto escolar: Uma observação do filme Koe no Katachi

O seguinte artigo tem como objetivo identificar e registrar categorias de comportamento associadas ao bullying contra deficientes no contexto escolar por meio da observação da animação Koe no Katachi. A educação inclusiva é um direito fundamental e por isso é importante compreender fenômenos que impedem sua implementação completa como o bullying, para que assim se possa impedir tais condições possibilitando uma educação inclusiva. A observação do filme foi feita utilizando a técnica de amostragem focal, sendo o sujeito observado a personagem Shoko, foram utilizadas técnicas mistas de registro variando entre o registro contínuo cursivo e o registro de evento, foi utilizado um protocolo de observação, demarcando sempre o objetivo, a data, minuto de início e fim, ambiente, descrição do sujeito, e as técnicas empregadas em cada caso, além do registro dos comportamentos seguidos pela produção analítica, visando os objetivos do presente trabalho, as cenas escolhidas para a observação estão presentes do minuto 4:24, até o minuto 17:00. Por meio da análise das cenas foi possível identificar a presença de barreiras comunicacionais e atitudinais  relacionadas a deficiência que impediam a inclusão plena da personagem, foi possível identificar que a instituição escolar contribui para a perpetuação dessas barreiras, por meio da negligência e despreparo dos professores, o que contribui com o comportamento de bullying observado nas mesmas cenas.

Metabolism within the tumor microenvironment and its implication on cancer progression: an ongoing therapeutic target

Since reprogramming energy metabolism is considered a new hallmark of cancer, tumor metabolism is again in the spotlight of cancer research. Many studies have been carried out and many possible therapies have been developed in the last years. However, tumor cells are not alone. A series of extracellular components and stromal cells, such as endothelial cells, cancer-associated fibroblasts, tumor-associated macrophages and tumor-infiltrating T cells, surround tumor cells in the so-called tumor microenvironment. Metabolic features of these cells are being studied in deep in order to find relationships between metabolism within the tumor microenvironment and tumor progression. Moreover, it cannot be forgotten that tumor growth is able to modulate host metabolism and homeostasis, so that tumor microenvironment is not the whole story. Importantly, the metabolic switch in cancer is just a consequence of the flexibility and adaptability of metabolism and should not be surprising. Treatments of cancer patients with combined therapies including anti-tumor agents with those targeting stromal cell metabolism, anti-angiogenic drugs and/or immunotherapy are being developed as promising therapeutics.Mª Carmen Ocaña is recipient of a predoctoral FPU grant from the Spanish Ministry of Education, Culture and Sport. Supported by grants BIO2014-56092-R (MINECO and FEDER), P12-CTS-1507 (Andalusian Government and FEDER) and funds from group BIO-267 (Andalusian Government). The "CIBER de Enfermedades Raras" is an initiative from the ISCIII (Spain). The funders had no role in the study design, data collection and analysis, decision to publish or preparation of the manuscript

Towards a characterization of behavior-disease models

The last decade saw the advent of increasingly realistic epidemic models that leverage on the availability of highly detailed census and human mobility data. Data-driven models aim at a granularity down to the level of households or single individuals. However, relatively little systematic work has been done to provide coupled behavior-disease models able to close the feedback loop between behavioral changes triggered in the population by an individual's perception of the disease spread and the actual disease spread itself. While models lacking this coupling can be extremely successful in mild epidemics, they obviously will be of limited use in situations where social disruption or behavioral alterations are induced in the population by knowledge of the disease. Here we propose a characterization of a set of prototypical mechanisms for self-initiated social distancing induced by local and non-local prevalence-based information available to individuals in the population. We characterize the effects of these mechanisms in the framework of a compartmental scheme that enlarges the basic SIR model by considering separate behavioral classes within the population. The transition of individuals in/out of behavioral classes is coupled with the spreading of the disease and provides a rich phase space with multiple epidemic peaks and tipping points. The class of models presented here can be used in the case of data-driven computational approaches to analyze scenarios of social adaptation and behavioral change.Comment: 24 pages, 15 figure

Small molecule probes of protein aggregation

Understanding the mechanisms of amyloid formation and toxicity remain major challenges. Whilst substantial progress has been made in the development of methods able to identify the species formed during self-assembly and to describe the kinetic mechanisms of aggregation, the structure(s) of non-native species, including potentially toxic oligomers, remain elusive. Moreover, how fibrils contribute to disease remains unclear. Here we review recent advances in the development of small molecules and other reagents that are helping to define the mechanisms of protein aggregation in molecular detail. Such probes form a powerful platform with which to better define the mechanisms of structural conversion into amyloid fibrils and may provide the much-needed stepping stone for future development of successful therapeutic agents

Partial Root-Zone Drying Technique: from Water Saving to the Improvement of a Fruit Quality

Due to climate changes and increased demands of different water users (agriculture, industry, domestic) water becomes scarce resources worldwide. Since irrigated agriculture is the one of the largest consumer of these resources (so-called blue water footprint), irrigation management must be shifted from maximal production per crop area to maximal production per unit of water used by crops. Among the strategies for reducing water footprints, changing the full irrigation to the reduced crop's water supply (deficit irrigation techniques) is one of the options. In this mini-review, we present the latest advances of partial root-zone drying (PRD) applications in different agricultural plants, with the special emphases on the PRD effects on increasing WUE, yield and yield quality. We describe two PRD practical approaches (alternate and fixed), BACKGROUND: of PRD induced increase in yield and water use efficiency and improved understanding about nutrient use efficiency. The evidence of PRD effect on the increase in nutritional and health attributes of yield in different species is also presented. Because of limited available data, further research is needed to understand complex biosynthetic pathway and synthesis of nutritive- and health-related metabolites and antioxidants in PRD-treated plants. Practical application and promotion of this knowledge will allow farmers in water scarce areas to adapt PRD not only as a strategy for saving water, improving nutrient use and increase/sustain yield, but also for producing food with enhanced nutritive and health characteristics