Caracterização mecânica de materiais utilizados em prototipagem rápida por deposição de material fundido para aplicação aeroespacial

Trabalho de Conclusão de Curso (graduação)—Universidade de Brasília, Faculdade UnB Gama, 2018.A prototipagem rápida através da deposição de material fundido teve larga expansão com dispositivos que replicam grande parte de suas próprias peças, ampliando o uso e estudos em volta de projetos tridimensionais realizados a partir de modelagem em softwares de desenho assistido por computador. A construção do protótipo e caracterização mecânica são desenvolvidas neste trabalho visando agregar mais conhecimento sobre os materiais para aplicações em experimentos futuros. A caracterização mecânica determina as propriedades de um material no intuito de delimitar seu uso em certas aplicações. Os filamentos adotados para a prototipagem descritos neste estudo são o Ácido Polilático, Acrilonitrila Butadieno Estireno e o Politereftalato de Etileno Glicol. Os ensaios realizados na Universidade de Brasília foram os seguintes: tração, pêndulo de impacto izod, excitação por impulso e flexão, baseados na normatização ASTM e descritos no estudo com a finalidade de definir propriedades para o uso aeroespacial

A tutela de direitos por meio de mecanismos de cooperação

Orientador: Manoel Eduardo Alves Camargo e GomesMonografia (graduação) - Universidade Federal do Paraná, Setor de Ciências Jurídicas, Curso de Graduação em DireitoInclui referênciasResumo: O trabalho tem o objetivo incorporar as bases teóricas multidisciplinares da cooperação ao Direito, a partir de uma perspectiva teórica multidisciplinar pouco explorada na área. São apresentadas duas perspectivas para analisar o tema da cooperação: uma simples, utilizando a teoria dos jogos, e outra mais complexa, com modelagem baseada em agentes. O autor propõe uma classificação dos mecanismos de cooperação em simples e complexos e traz exemplos de ambos os tipos. A questão a que se pretende responder se refere à possibilidade de tutela de direitos por meio de mecanismos de cooperação e suas ferramentas, para além do Direito Internacional e da visão principiológica.Abstract: The aim of this work is to incorporate the multidisciplinary theoretical bases of cooperation into the field of law, from a rarely explored multidisciplinary theoretical perspective. Two perspectives are presented for analyzing the topic of cooperation: a simple one, using game theory, and a more complex one, using agent-based modeling. The author proposes a classification of cooperation mechanisms into simple and complex and provides examples of both types. The question being addressed is the possibility of protecting rights through cooperation mechanisms and tools, beyond international law and principled views

As estatais endógenas : reflexões doutrinárias sobre a natureza jurídica de uma velha (des)conhecida

O presente artigo busca, por meio de pesquisa teórico-bibliográfica, investigar como a dogmática pátria vem tratando o fenômeno das Empresas Estatais que prestam suporte à própria Administração Pública, também denominadas de Empresas Estatais Endógenas. Após constatar que a natureza e o regime jurídico de tais Estatais, a despeito de suas relevantes peculiaridades, são artificialmente enquadrados, por parte significativa da doutrina administrativista, dentro da moldura dicotômica "prestação de serviço público/atividade econômica stricto sensu", este trabalho passa a propor um outro olhar, mais consentâneo com as múltiplas demandas e complexas atividades exercidas pela Administração Pública contemporânea.This article seeks to investigate, through theoretical-bibliographic review, how Brazilian legal scholars have been analyzing the concept of state-owned enterprises whose main task is to provide assistance to the public administration itself, also known as endogenous state-owned enterprises. After concluding that, despite their relevant peculiarities, the legal nature and regime of such enterprises are artificially framed by a considerable majority of scholars of administrative law within the dichotomous framework of “provision of public utilities/economic activity”, this article then proposes a new perspective, more in line with the multiple demands and complex activities carried out by a contemporary public administration

Two tails of crisis: institutes of exception in the USA and France

This article describes the main legal instruments deployed by the United States and France in their struggle against crises, such as wars, massive and disorderly immigration and the global expansion of terrorist threats. Firstly, it shows the permanent showdown in the USA between Constitutionalism in general and Administrative Constitutionalism in particular, vectors of protection of individual freedom and restraint of power, and the need to preserve public order and national security. Therefore, it focuses on several constitutional, legal and jurisprudential institutes developed by the French legal order in an attempt to respond to the chronic problems that so much instability and fear cause in their society. Finally, it points out brief considerations the crisis instruments provided by Brazilian law.O artigo descreve os principais instrumentos jurídicos empregados pelos Estados Unidos e pela França no combate a situações de crise, tais como guerras, imigração massiva e desordenada e a expansão global de ameaças terroristas. Primeiro, apresenta o permanente confronto, nos EUA, entre o Constitucionalismo, em geral, e o Constitucionalismo Administrativo, em particular, vetores de proteção da liberdade individual e contenção do Poder, e a necessidade de preservação da ordem pública e da segurança nacional. Por conseguinte, debruça-se sobre os mais diversos institutos constitucionais, legais e jurisprudenciais desenvolvidos pela ordem jurídica francesa na tentativa de dar uma resposta aos problemas crônicos que tanta instabilidade e medo causam em sua sociedade. Ao final são feitas breves considerações acerca dos instrumentos de crise fornecidos pela ordem jurídica brasileira

Harmonizing income classes from 2000 and 2010 Brazilian censuses

Income variables from the Brazilian population census (IBGE) are often used as proxies for the population’s socioeconomic level in spatial analyses of urban segregation, inequality and social exclusion. However, income variables are dependent on reference values (minimum wage) that change over time, which can be challenging for multitemporal analysis. This paper discusses this issue and proposes a methodology to adjust income data that allows a meaningful comparison between the datasets of two Census periods. The methodology was applied to five medium-sized cities of the state of São Paulo by adjusting income data from Census 2000 and 2010 according to the period’s inflation rates. The analysis shows that the methodology mitigates the comparability issues. Results better reflect the changes in population composition and in residential patterns of different income groups that took place over the 2000s in Brazil in medium-sized cities

AVERSIVE CONTROL IN BEHAVIOR ANALYSIS: AN ANALYSIS OF JEAB AND JABA PUBLICATIONS (1958-2018)

AVERSIVE CONTROL IN BEHAVIOR ANALYSIS: AN ANALYSIS OF JEAB AND JABA PUBLICATIONS (1958-2018)We analyzed the frequency of publications on aversive control and publication trends concerning specific aversive contingencies. The articles were published between 1958 and 2018 in two journals: Journal of the Experimental Analysis of Behavior (JEAB) and Journal of Applied Behavior Analysis (JABA). We selected articles that presented at least one of the following descriptors in the title, abstract, or keywords: aversive, avoidance, escape, negative reinforcement, and punishment. We verified that the publication frequency on aversive control was higher in JEAB than in JABA until the 1990s, at which point the trend was reversed. An irregular increase has been observed in JEAB publications on the topic since 2000. The rise of applied research on aversive control is related to growing interest in negative reinforcement. This significant decrease in studies on aversive control may be related to stricter ethical regulations in research and related to the assertions of some authors to reduce the aversive control use. The increase in applied studies since the 1990s appears to be related to the greater use of functional assessments and the development of treatments for behavioral problems that result from negative reinforcement contingencies. Key words: aversive control, aversive contingencies, Behavior Analysis, publication

Body mass index but not physical activity level moderates lowered cardiac baroreflex sensitivity in people living with HIV

International Journal of Exercise Science 16(2): 700-709, 2023. Reduced cardiac baroreflex sensitivity (cBRS) is an autonomic marker associated with a worse cardiovascular prognosis. Whether cBRS is lowered in people living with HIV (PLHIV) is yet unclear, as well as potential moderator effects of body mass index (BMI) or physical activity (PA) level. The present study aims to compare the spontaneous cBRS in PLHIV vs. HIV-uninfected controls, and to determine among PLHIV the relationship between cBRS vs. body mass index (BMI) and PA level. Total, upward (cBRS+), and downward (cBRS-) cBRS gains were assessed using the sequential method from beat-to-beat blood pressure at rest in 16 PLHIV (46.5±8.4 years) under antiretroviral therapy for at least 6 months, and 16 HIV-uninfected controls (CTL; 42.1±8.0 years). PA level was assessed by the Physical Activity Questionnaire (IPAQ short version) overall score. PLHIV showed lower total cBRS (8.7±3.1 vs. 15.3±7.7 ms.mmHg-1; p \u3c 0.01), cBRS+ (9.2±4.9 vs. 16.0±6.8 ms.mmHg-1; p \u3c 0.01) and cBRS- (9.5±4.9 vs. 15.3±9.3 ms.mmHg-1; p \u3c 0.01) vs. CTL. No between-group difference was found for BMI (PLHIV: 25.2±2.6 vs. CTL: 26.8±3.2 kg.m-2; p \u3e 0.05) or IPAQ score (PLHIV: 2.4±1.0 vs. CTL: 2.0±1.4; p \u3e 0.05). In PLHIV, total cBRS was inversely correlated vs. BMI (r = -0.44; p = 0.04), but not vs. IPAQ score (r = 0.17; p = 0.26). HIV infection may reduce spontaneous cBRS, which seemed to be moderated by higher BMI, but not PA level of PLHIV