Mathematic
Mostrando 1-12 de 175 artigos, teses e dissertações.
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1. FUZZY MODELING OF SALINITY EFFECTS ON RADISH YIELD UNDER REUSE WATER IRRIGATION
ABSTRACT The increase of water usage for food production in recent years has triggered researches on ways to optimize the use of water and to reuse saline water. The present study analyzes the effects of reused saline water in the irrigation of radish culture and the construction of a fuzzy logical mathematic model so that producers may evaluate their produc
Engenharia Agrícola. Publicado em: 2022
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2. Utilizing the Shift-or-Shrink Algorithm to Optimize the Direct Coupling from Laser Diodes to Diffused Channel Waveguides
Abstract Several formulae for computing the direct coupling efficiencies from laser diodes to diffused channel waveguides, based on mathematic models for approximating the corresponding laser beams and the waveguiding modes, have been derived in this paper. Then, the authors utilize a simple shift-or-shrink (SOS) algorithm to seek their optimal coupling cond
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2021-06
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3. Meta-análise sobre Conhecimento para Ensinar Divisão de Frações
Resumo O objetivo deste artigo é identificar as principais contribuições de estudos sobre conhecimento docente relativo ao ensino e à aprendizagem da divisão de frações e analisar como tais resultados contribuem para responder a pergunta: que conjunto de conhecimentos um professor precisa para ensinar e fazer aprender divisão de frações? Realizamos
Bolema. Publicado em: 02/12/2019
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4. Abordagem das Dificuldades de Ensino e Aprendizagem do Domínio da Estatística na Graduação em Psicologia: um olhar através do contrato didático
Resumo O ensino de conteúdos conceituais, competências e habilidades relacionados à análise quantitativa de dados nos cursos de graduação em Psicologia tem se mostrado problemático. Enquanto domínio da Matemática, a Estatística de fato se distancia dos saberes usualmente trabalhados nas demais disciplinas. O estudo em questão buscou investigar asp
Bolema. Publicado em: 02/12/2019
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5. Análisis de la Gestión de un Dispositivo Didáctico por un Estudiante de Profesorado en Matemática
Abstract This work is set in the problematic of mathematics trainees. We describe the result of the didactic device management by a mathematics trainee. The student did a course that we designed to the didactic mathematic formation, which adopts a didactic non-traditional model based in research and the link with other disciplines. This student carried out h
Bolema. Publicado em: 2019-04
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6. Modelamiento de la respiración del mango (Mangifera indica l.) usando el método de sistema cerrado a diferentes temperaturas
Abstract Measuring the respiration rate of fresh products is essential to design correct of packaging systems. For such effect, rates of consumption of O2 and production of CO2, usually are taken are initial data of system comportment. The aim of this work, was modelling the respiration of whole mango (Mangifera indica L.), variety Tommy Atkins using a clos
Rev. Bras. Frutic.. Publicado em: 25/06/2018
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7. Formación de Profesores de Matemáticas desde la Etnomatemática: estado de desarrollo
Abstract The goal of this study is to contribute to our understanding of the state of research development about math professors’ training from an ethnomathematics perspective. The empirical material was selected from articles published between 1995 and 2015. The analysis was oriented around four questions: What characteristics should a school curriculum b
Bolema. Publicado em: 2017-08
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8. Automated sugar analysis
Abstract Sugarcane monosaccharides are reducing sugars, and classical analytical methodologies (Lane-Eynon, Benedict, complexometric-EDTA, Luff-Schoorl, Musson-Walker, Somogyi-Nelson) are based on reducing copper ions in alkaline solutions. In Brazil, certain factories use Lane-Eynon, others use the equipment referred to as “REDUTEC”, and additional fact
Food Sci. Technol. Publicado em: 15/03/2016
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9. Gestión de recursos humanos en la empresa, desempeño y sentido de compromiso
ABSTRACT Objective: The objective was to measure and to evaluate the construct “sense of commitment”, to insert it in the activities of Human Resources Management (HRM). Design/methodology/approach: The used methods were interviews, mathematic modeling, and statistical correlation. Findings: As the results, mathematical models were obtained and use
Rev. bras. gest. neg.. Publicado em: 2015-06
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10. Tendencias Temáticas de la Investigación en Educación Matemática en España
We present a conceptual-bibliometric study about Spanish scientific publications on mathematics education in which we identify thematic trends during the last years in Spain. We analyze 959 research articles published between 1999 and 2011 in a representative sample of eight journals of general education and of mathematic education following the classificati
Bolema. Publicado em: 2014-12
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11. Microstructural characterization and mechanical behavior of a low-carbon 17%Mn steel
Steels containing high levels of Mn, Si and Al exhibit high plasticity when deformed, owing to twinning-induced plastitity (TWIP) and transformation-induced plasticity (TRIP) effects. In this study, we investigated the microstructural evolution of samples of samples of a 17%Mn steel subjected to war rolling at 700º and 800ºC. We also studied the effects of
Mat. Res.. Publicado em: 27/05/2014
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12. Anti-hepatitis C virus treatment may prevent the progression of liver fibrosis in non-responder human immunodeficiency virus/hepatitis C virus coinfected patients
AIM: To evaluate changes in liver histology in patients with human immunodeficiency virus/hepatitis C virus coinfection non-responders to a suboptimal Interferon+Ribavirine regimen. MATERIALS AND METHODS: We investigated 49 patients with two sequential liver biopsies: 18 were non-responders to Interferon+Ribavirine treatment (Group hepatitis C virus Rx) a
Braz J Infect Dis. Publicado em: 2014-04