São Paulo Federal Institute of Education, Science and Technology

About: São Paulo Federal Institute of Education, Science and Technology is a education organization based out in São Paulo, Brazil. It is known for research contribution in the topics: Context (language use) & Computer science. The organization has 1707 authors who have published 2374 publications receiving 11333 citations.

Análise das concepções astronômicas apresentadas por alunos do Instituto Federal de São Paulo - Campus Cubatão

Abstract: Resumo Este artigo relata os resultados de uma pesquisa de conhecimento em astronomia, realizada entre os alunos do Curso Superior de Tecnologia em Automacao Industrial do Instituto Federal de Educacao, Ciencia e Tecnologia de Sao Paulo, Campus Cubatao. Para verificar o nivel de conhecimento previo dos alunos, aplicou-se um questionario com vinte e cinco perguntas de conhecimento basico. Na primeira etapa, verificou-se o aprendizado ineficiente obtido no ensino fundamental e medio destes alunos. Corrigindo-se esta falha grave, ministrou-se, externo ao conteudo programatico, um curso basico em astronomia, contendo aulas presenciais, palestras e filmes. Analisadas as respostas desta segunda etapa, comprova-se que os alunos obtiveram uma melhora significativa no aprendizado.

Aplicação do Analytic Hierarchy Process na escolha de planos de saúde

Abstract: The contemporary world we live in leads us to a constant pace of life and diverse needs, so when it comes to medical care, the needs are very diverse. For this reason, when looking for a health plan, several factors need to be considered in order to make a decision, such as coverage that works with personal and family life, number of available care units, location of these units, and , an attractive cost-benefit ratio. This article aims to present a proposed approach to identify factors that users consider as most relevant in choosing a health plan service. The Multicriteria Analytic Hierarchy Process (AHP) was used to help identify the relevant factors used in the selection of health plans. And, as a research unit, an application was carried out with a group of users, with the intention of understanding the perspectives as decision makers. As a result, when a dynamic sensitivity analysis was performed, it was observed that the factors considered most relevant at the moment of decision making were quality and speed of care, these received the highest weights, 33.9% and 23.6% , respectively. The proposed approach provides an important planning and operating tool for health plan operators, who are then able to examine which factors are considered most important in their visions and thus formulate competitive strategies and market positioning.

Electromagnetic properties of Carbon-Graphene Xerogel, Graphite and Ni-Zn Ferrite composites in polystyrene matrix in the X-Band (8.2 – 12.4 GHz)

Abstract: The electromagnetic properties of Carbon-Graphene Xerogel (CGX), Flaky graphite (GR) and Nickel-Zinc ferrite (FeNiZn) composites in polystyrene (PS) matrix were studied in the X-Band range (8.2 – 12.4 GHz). In this work the Expanded Polystyrene (EPS) waste material was processed into polystyrene through the recycling of EPS. The polystyrene obtained was utilized as dielectric matrix, mainly because PS is a wellknown organic polymer that presents low dielectric loss and light weight, which contribute to applications in composites for the aerospace field. In order to produce the final composite specimens, the CGX additive was previously synthesized through a sustainable method that employed the use of waste from the paper and pulp industry (black liquor). Afterwards, the morphological and structural analysis were made through Scanning Electron Microscope (SEM) and Raman Spectrometer, respectively. On the other hand, the magnetic ferrite material, FeNiZn, was obtained for the composite production through calcination, whereas the GR utilized was commercially obtained. It was observed that the increase of CGX and GR influenced on the increase of the Complex Permittivity, and that 10 wt% CGX + 50wt% FeNiZn composite sample demonstrated an absorption peak at 10.5 GHz. The results are relevant concerning the recycling of EPS waste through its use as dielectric matrix, thus developing greener and low-weight composite materials to be used in microwave applications. Keywords: Carbon-Graphene. Composite. Recycling. Polystyrene. Microwave.

Nonlinear Equilibrium and Stability Analysis of Axially Loaded Piles Under Bilateral Contact Constraints

Abstract: This paper presents a nonlinear stability analysis of piles under bilateral contact constraints imposed by a geological medium (soil or rock). To solve this contact problem, the paper proposes a general numerical methodology, based on the finite element method (FEM). In this context, a geometrically nonlinear beam-column element is used to model the pile while the geological medium can be idealized as discrete (spring) or continuum (Winkler and Pasternak) foundation elements. Foundation elements are supposed to react under tension and compression, so during the deformation process the structural elements are subjected to bilateral contact constraints. The errors along the equilibrium paths are minimized and the convoluted nonlinear equilibrium paths are made traceable through the use of an updated Lagrangian formulation and a Newton-Raphson scheme working with the generalized displacement technique. The study offers stability analyses of three problems involving piles under bilateral contact constraints. The analyses show that in the evaluation of critical loads a great influence is wielded by the instability modes. Also, the structural system stiffness can be highly influenced by the representative model of the soil.

First description of nests, eggs, and nestlings of the Pearly-bellied Seedeater (Sporophila pileata)

Abstract: The “capuchinos” form a monophyletic group within the Neotropical seedeaters of the genus Sporophila and are typically smaller than the other congeners. Many of the 12 species of this group are endangered, but reproductive information is scarce for most of them. Here we present the descriptions of nests, eggs, nestlings, and nesting habitats for the Pearly-bellied Seedeater (Sporophila pileata). From 2012 to 2017 we found 83 nests constructed in herbaceous plants present in open marshlands, 15–73 cm above water or humid ground. Nests were deep cups built of grass stems, inflorescences, and rootlets, attached with spider web. Nests measured 59.3 ± 4.7 mm outside diameter, 50.7 ± 6.5 mm outside height, 41.6 ± 3.2 mm internal diameter, and 35.7 ± 3.3 mm internal depth. Eggs were oval with white, grayish, or greenish background color with black and brown spots mainly in the obtuse pole. They weighed 1.2 ± 0.1 g and measured 16.3 ± 0.8 per 12.2 ± 0.3 mm. Clutches consisted of 1–3 eggs. Our study sites...