Multigroup Model
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. A Nodal-iterative Technique for Criticality Calculations in Multigroup Neutron Diffusion Models
ABSTRACT In this work, a nodal and iterative technique to evaluate the effective multiplication factor as well as the neutron flux, in multigroup diffusion problems, is presented. An iterative scheme, similar to the source iteration method, is implemented to decouple the system of differential equations which is the fundamental mathematical model. Then, anal
Trends in Computational and Applied Mathematics. Publicado em: 2022
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2. Gender invariance and psychometric properties of a Brazilian version of the Emotion Regulation Questionnaire (ERQ)
Abstract Introduction Emotion regulation refers to use of strategies to change or suppress a response to an affective experience and is an important component of an individual’s subjective wellbeing. Difficulties properly regulating emotions are related to psychopathological processes. Objective This study assessed the factor structure of the Brazilian
Trends Psychiatry Psychother.. Publicado em: 2021-06
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3. Pain catastrophizing: rumination is a discriminating factor among individuals with different pain characteristic
Abstract: The objective of this study was to compare the scores of the Helplessness, Magnification, Rumination, and Catastrophizing factors of the Pain Catastrophizing Scale (PCS) between samples with different pain characteristics. The psychometric properties of the PCS were evaluated in 1,151 Brazilian adults (78.9% female; 38.6 (SD = 10.8) years): 335 had
Braz. oral res.. Publicado em: 02/12/2019
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4. Psychometric properties of the Questionnaire of Attitudes towards Doping in Fitness (QAD-Fit)
Abstract Aim: The purpose of this study was to test the psychometric proprieties of the Questionnaire of Attitudes towards Doping in Fitness (QAD-Fit), originally developed by Serpa and colleagues and adapted to Portuguese gym/fitness context. Methods: A cross-sectional survey utilizing a web self-administered questionnaire was used. The sample was compose
Motriz: rev. educ. fis.. Publicado em: 01/08/2019
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5. Financial literacy in Brazil – do knowledge and self-confidence relate with behavior?
Purpose People are increasingly responsible for making sound financial decisions to foster their financial satisfaction and well-being, which magnifies the importance of financial literacy, and this concept and measurement is still not yet crystallized in the literature, specifically capturing different behavior perceptions. Moreover, there is not a distinc
RAUSP Manag. J.. Publicado em: 02/05/2019
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6. Validation and Invariance of the Dental Anxiety Scale in a Brazilian sample
Abstract: The aim of this study was to evaluate the properties of the Dental Anxiety Scale (DAS) when applied to Brazilian adults and to test its invariance across independent samples and different sociodemographic groups. Sociodemographic data, reports on previous unpleasant dental experiences and DAS responses were collected through telephone interviews. M
Braz. oral res.. Publicado em: 22/12/2016
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7. Validation of a measuring instrument for the perception of oral health in women
The aim of this study was to estimate the reliability, validity and factorial invariance of the Portuguese version of the Geriatric/General Oral Health Assessment Index (GOHAI) as applied to Brazilian women. A total 701 women over 18 years of age participated in this study. Telephone interviews were conducted. We evaluated the construct-related validity thro
Braz. oral res.. Publicado em: 18/08/2014
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8. Factors affecting mobile users' switching intentions: a comparative study between the brazilian and german markets
In the competitive wireless market, there are many drivers behind customer defection. Switching barriers, service performance, perceived value in carriers' offers, satisfaction and other constructs can play a pivotal role in customer switching processes among carriers. This study attempts to compare the influence of these factors, taking into account cultura
BAR, Braz. Adm. Rev.. Publicado em: 2013-09
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9. Solução da equação Sn multigrupo de transporte dependente do tempo em meio heterogêneo
In this dissertation is presented an analytical solution for the approximation SN transport equation with the time dependent power, to homogeneous plates as to heterogeneous, assuming a multigroup model with isotropic scattering. The main idea involves the following steps, in this order: construction of a solution to the equation mentioned in a homogeneous p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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10. Educar para a paz: comportamentos pró-sociais
The central theme of theses is education for the peace at school. This theme is discussed based on the bibliography available and on investigation. The investigation was carried through the school year of 2009 with 151 adolescentes from four public schools in the metropolitan region of Belo Horizonte. The fundamental and motivating question of the thesis is:
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/07/2011
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11. Um método SN híbrido direto para cálculos de sistemas combustível-moderador em geometria unidimensional / A direct hybrid SN method for slab-geometry fuel-moderator lattice calculations
Desenvolvemos nesta dissertação um método híbrido direto para o cálculo do fator de desvantagem e descrição da distribuição do fluxo de nêutrons em sistemas combustível-moderador. Na modelagem matemática, utilizamos a equação de transporte de Boltzmann independente do tempo, considerando espalhamento linearmente anisotrópico no modelo monoener
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/06/2011