Physical Modelling
Mostrando 1-12 de 75 artigos, teses e dissertações.
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1. Fuzzy Modelling to Describe the Pollutant Concentration in Fluids
ABSTRACT The study of the concentration dynamics of a pollutant substance in a fluid is a classic problem of fluid mechanics given by the transport equation u t + cu x = 0, where u = u(x,t) denotes the pollutant concentration along a horizontal pipe of a fixed cross-section in the positive x direction at he time t > 0 and c represents the fluid propagation
Trends in Computational and Applied Mathematics. Publicado em: 2022
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2. DENSITY CALCULATIONS OF AQUEOUS AMINE SOLUTIONS USING AN EXCESS GIBBS BASED MODEL
Abstract Accurate representation of the physical properties of a solvent is essential for design and simulation of processes. Density and viscosity, for instance, have an important role in modelling and designing absorption and desorption towers. In the present work, a model to accurately calculate the density of aqueous amine solutions used in CO2 capture w
Braz. J. Chem. Eng.. Publicado em: 09/12/2019
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3. Validity and reliability of the 36-Item Short Form Health Survey questionnaire version 2 among people living with HIV in Brazil
ABSTRACT Background: The 36-Item Short Form Health Survey questionnaire (SF-36) is a widely used instrument for evaluating health-related quality-of-life (HRQoL). The psychometric validation of the SF-36 version 2.0 (SF-36v2) in HIV-infected patients had not yet conducted in Brazil. Aim: To test data quality, reliability and validity of the SF-36v2 as a me
Braz J Infect Dis. Publicado em: 25/11/2019
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4. Photogrammetry and 3D prototyping: A low-cost resource for training in veterinary orthopedics
RESUMO: A prototipagem rápida (PR) é uma tecnologia inovadora que permite obter o protótipo de um molde com rapidez e precisão a partir de um modelo virtual. Esse estudo objetivou estabelecer o uso da fotogrametria e prototipagem 3D para a produção de biomodelos de ossos da espécie canina, para treinamento em técnicas ortopédicas em Medicina Veteri
Cienc. Rural. Publicado em: 25/11/2019
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5. MATHEMATICAL MODELLING AND IMMEDIATE AND LATENT QUALITY OF NATURAL IMMATURE COFFEE UNDER DIFFERENT DRYING CONDITIONS
ABSTRACT This work aimed to study the immediate and latent effects of different relative humidities on the quality of dried coffee fruits, describe the drying kinetics of natural immature coffee (Coffea arabica L.), and evaluate the mathematical model that best fits the experimental drying data. The drying was carried out in a fixed layer dryer coupled to a
Eng. Agríc.. Publicado em: 04/11/2019
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6. Uma revisão dos princípios da conversão fotovoltaica de energia
Resumo A conversão fotovoltaica de energia é uma área de pesquisa muito ativa devido à necessidade de ampliar a participação das fontes de energia renováveis na matriz energética global. Os esforços de pesquisa vão desde a modelagem de dispositivos fotovoltaicos a partir de princípios físicos fundamentais ou fenomenologias, passando pelo desenvol
Rev. Bras. Ensino Fís.. Publicado em: 07/10/2019
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7. Physical stability of iron ore caves: geomechanical studies of a shallow underground cave in SE Brazil
Abstract Caves hosted in iron formations are attracting considerable interest due to their scientific and environmental value. Some of these caves are located in or near iron ore mine sites, which represent an important source of income to Brazil. However, the Brazilian legislation requires speleological studies that currently have an impact upon ore reserve
REM, Int. Eng. J.. Publicado em: 2019-06
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8. METHODOLOGICAL REVIEW OF MODEL-BASED COST-EFFECTIVENESS ANALYSES OF SCHOOL-BASED INTERVENTIONS TO INCREASE PUPILS’ LEVEL OF PHYSICAL ACTIVITY
RESUMO Um grande número de intervenções escolares que promovem a atividade física foram desenvolvidas. Devido as dificuldades de se obter dados observacionais sobre o efeito a longo prazo e as conseqüências dos custos, as técnicas de modelagem oferecem oportunidades para considerar as conseqüências econômicas e de saúde a longo prazo. O objetivo d
J. Phys. Educ.. Publicado em: 29/04/2019
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9. Incertezas na simulação hidrológica em pequenas bacias por meio do modelo SWAT
ABSTRACT Hydrological modelling is one of the main tools in water resources management application. However, several factors make it difficult to extrapolate the estimated parameters in basins with large contribution areas to smaller basins. This research analysed the uncertainties of flow simulations in small basins. The methodological process involves the
RBRH. Publicado em: 08/11/2018
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10. A short remark on the modelling of a three-story shear-building structure
Abstract In this note, some remarks on the modelling of a multi-degree-of-freedom system, a three-story shear-building structure, is presented. The modelling of a mechanical system is one of the most important aspects in engineering and physics, since is crucial for the understanding of the system. Besides, the model, if properly made, can be also useful to
Rev. Bras. Ensino Fís.. Publicado em: 21/09/2018
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11. Differential Scanning Calorimetry study on curing kinetics of diglycidyl ether of bisphenol A with amine curing agents for self-healing systems
ABSTRACT Epoxy resin is one of the most important polymeric matrixes for diverse uses, such as aeronautical, mobile, electronics and others. Providing a material capable of self-healing microcracks will allow it to have a more reliable and longer use. In order to study this new property of self-healing to an epoxy resin, a Differential Scanning Calorimetry (
Matéria (Rio J.). Publicado em: 20/07/2017
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12. Non-Linear Three Dimensional Finite Elements for Composite Concrete Structures
Abstract The current investigation focused on the development of effective and suitable modelling of reinforced concrete component with and without strengthening. The modelling includes physical and constitutive models. New interface elements have been developed, while modified constitutive law have been applied and new computational algorithm is utilised. T
Lat. Am. j. solids struct.. Publicado em: 2017-03