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Mostrando 1-12 de 10552 artigos, teses e dissertações.
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1. Impact of fuel quantity on luminescence properties of Sr3Al2O6:Eu by combustion synthesis
Abstract The photoluminescent behavior of Eu-doped Sr3Al2O6 obtained by highly efficient solution combustion synthesis is reported. In order to understand the influence of the fuel on the synthesis, the stoichiometric quantity and an excess of fuel were evaluated. By adjusting the amount of fuel, different luminescence responses were obtained, allowing europ
Cerâmica. Publicado em: 2023
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2. The environment in Petrobrás magazine (1961-1979): Meaning mobilized by corporate discourse
Abstract Purpose This study analyzes the ideological constructions of Petrobras’ corporate environmental discourse during the period from 1961 to 1979. Theoretical framework The paper uses Thompson’s (2011) critical conception of ideology, specifically its modes of operation and strategies of symbolic construction. Design/methodology/approach The stud
Revista Brasileira de Gestão de Negócios. Publicado em: 2023
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3. Sensitivity analysis of the AquaCrop model for wheat crop in Campos Gerais region, Paraná
ABSTRACT The use of crop modeling can be useful to understand the interactions between the soil-plant-atmosphere system. The objective of this study was to evaluate sensitivity analysis of the AquaCrop model parameters for wheat crop in the Campos Gerais Region. The varietie tested was TBIO Sinuelo in Castro, Ponta Grossa and Itaberá cities. The analyzed pa
Revista Ceres. Publicado em: 2023
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4. PREDICTIVE PROCESSING AND THE SEMIOLOGICAL PRINCIPLE: COMMENTARY TO DUFFLEY
Abstract The aim of this commentary is to underpin Duffley’s notion of a stable mental content that corresponds to the literal word meaning with a computationally plausible cognitive theory. Our approach is to investigate what these stable contents could be according to the so-called Predictive Processing architecture. We argue that recent advances in cogn
Manuscrito. Publicado em: 2022
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5. Do voters reward politicians for education expenditures?
Abstract Since education is publicly provided in most countries, the political system typically determines the level of education expenditures. Thus, it is essential to understand politicians' incentives to allocate resources to education. This paper provides causal evidence that voters reward politicians for educational expenditures by estimating the impact
Revista Brasileira de Economia. Publicado em: 2022
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6. A New Synthetic Route and Comprehensive Topological Study of a Benzimidazole Derivative
Benzimidazole and its derivatives are molecules that have diverse biological properties, therefore we synthesized and studied a new benzimidazole to understand their physical/chemical properties. The compound was obtained through a new synthetic route, using graphite oxide, in the absence of solvent, with crystalline packaging supported by C-H…N and C-H…
Journal of the Brazilian Chemical Society. Publicado em: 2022
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7. A note on the Brazilian cross-state debt connectedness
Abstract We address the cross-state indebtedness (DCL/RCL) variation connectedness using 89 bimonthly data from 2006b6 to 2021b4, based on the indices proposed by Diebold and Yilmaz (2009, 2012, 2014). This framework enables us to infer about the direction, and the strength of bilateral spillovers for a large number of simultaneously interacting variables in
Revista Brasileira de Economia. Publicado em: 2022
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8. Micronutrient content and accumulation in leaves and bunches of black pepper during two crop cycles
ABSTRACT A comprehensive knowledge about micronutrient dynamics in leaves and bunches of black pepper is needed in order to proper diagnose nutrient needs, and thus facilitate fertilization management. This study aimed to evaluate micronutrient concentration and accumulation in leaves and bunches of black pepper bunches to understand the crop nutritional dem
Revista Ceres. Publicado em: 2022
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9. L’ECOLOGISATION DES POLITIQUES PUBLIQUES : LE DISCOURS ET LA PRATIQUE DU SCHEMA DIRECTEUR DE LA VILLE DE ARARUAMA, BRESIL
ABSTRACT This article proposes to open a debate about the “greening” of public policies through the analysis of local strategies. Greening will thus be treated in this article as an institutional support and, in particular, of public institutions which deliberate on legislative texts, in order to make them compatible with global ecological guidelines, wi
Revista de Direito da Cidade. Publicado em: 2022
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10. Tuberculous Aortic Aneurysm - A Review
ABSTRACT Introduction: Tuberculous aortic aneurysm (TBAA) is an exceedingly rare but severe manifestation of tuberculosis, with a high risk of sudden rupture of the aorta in absence of medical or surgical intervention. This review aimed to provide a detailed understanding of TBAA, including its associated complications, affected population, treatment measur
Brazilian Journal of Cardiovascular Surgery. Publicado em: 2022
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11. Microstructural characteristics, properties, synthesis and applications of mullite: a review
Abstract Mullite, an intermediate phase of the binary alumina-silica system, is one of the most important phases of ceramic products containing alumina and silica in the initial composition. Its stoichiometry ranges from 3Al2O3.2SiO2 (3:2) to 2Al2O3.SiO2 (2:1) and its crystalline structure is orthorhombic, characterized by the presence of octahedral chains o
Cerâmica. Publicado em: 2022
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12. ROBÓTICA EDUCACIONAL, ENSINO DE QUÍMICA E APRENDIZAGEM COOPERATIVA: UMA PROPOSTA PARA O CURSO DE ENSINO SUPERIOR EM ENGENHARIA CIVIL
Students, generally, are afraid of studying chemistry because they understand that it is a very complex area of knowledge and that it doesn’t has use in daily lives and in intended profession, which is a problem we identified in a Civil Engineering course. With this, we proposed a project in this course, based on educational robotics and educational cooper
Química Nova. Publicado em: 2022