Technological Structure
Mostrando 1-12 de 303 artigos, teses e dissertações.
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1. Freeze-casting applied to ceramic materials: a short review of the influence of processing parameters
Abstract In recent years there is a high interest in the freeze-casting process because it is a simple, economical, and environmentally friendly method for obtaining highly porous materials. Most of the materials obtained by this technique have directional pore structure and anisotropic properties. However, a wide range of pore size and morphology can be obt
Cerâmica. Publicado em: 2021-03
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2. Microstructural and mechanical characterisation of the Simon Bolivar's iron bridge structure, 19th century, Arequipa, Peru
Abstract The microstructure of the main structural elements (Phoenix columns, transversal beams and tie-rods) of the Simón Bolivar iron bridge, located in Arequipa (Peru), was investigated. The bridge was supposedly designed by Gustave Eiffel and opened to the public in 1882. The characterisation revealed that the columns, beams and tie-rods are made of pud
REM, Int. Eng. J.. Publicado em: 2020-12
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3. SÍNTESE E CARACTERIZAÇÃO DE PONTOS QUÂNTICOS AMBIENTALMENTE AMIGÁVEIS, UM MEIO SIMPLES DE EXEMPLIFICAR E EXPLORAR ASPECTOS DA NANOCIÊNCIA E NANOTECNOLOGIA EM CURSOS DE GRADUAÇÃO
Nanotechnologies and nanomaterials are very current and interesting topics and can be used as interdisciplinary tools in education. They can be used to work in a practical and interesting way with lots of subjects. In chemistry teaching it can be particularly important to consolidate the nanomaterials, nanotechnology and characterization teaching. Among the
Quím. Nova. Publicado em: 2020-06
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4. A política de inovação para o setor mineral no Brasil: uma análise comparativa com a Suécia centrada na interação dos agentes envolvidos
Resumo Este artigo tem por objetivo geral examinar a política de inovação para o setor mineral no Brasil. De modo mais específico, o artigo caracteriza a política de inovação para o setor no Brasil; identifica as prioridades que cada agente (universidade, empresa e governo); revela a formulação e execução da política; e verifica, na percepção d
Cad. EBAPE.BR. Publicado em: 20/01/2020
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5. Serpentinites: Mineral Structure, Properties and Technological Applications
Serpentine is a versatile mineral family rich in Mg silicate with several polymorphic phases, mainly antigorite and lizardite, all of them with similar chemical composition (Mg3Si2O5(OH)4). Their structures are generally composed of octahedral layers rich in Mg[MgO2(OH)4]6- , attached to a tetrahedral silicate [Si2O5]2- sheet. The unique physicochemical prop
J. Braz. Chem. Soc.. Publicado em: 2020-01
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6. Leverage and investment opportunities: the effect on high growth firms
RESUMO O objetivo deste trabalho é investigar se o alto crescimento da firma resultará em redução do nível de dívida. Espera-se que isso aconteça para firmas que sofrem choque idiossincrático positivo nas suas oportunidades de crescimento, o que afetará seu fluxo de caixa e sua lucratividade. Embora a relação entre oportunidades de crescimento (e.
Rev. contab. finanç.. Publicado em: 09/12/2019
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7. Surface morphology and repellency mechanism investigation of Salvinia molesta plant
ABSTRACT Bionics is a versatile tool with a technological potential, which designers use to search for signs and clues about functional elements and mechanisms in nature that allow for the development of products. The purpose of this study was to analyze the morphology of the aquatic plant Salvinia molesta, aiming to determine the water repellency of its lea
Matéria (Rio J.). Publicado em: 25/11/2019
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8. Vulnerability to HIV among older men who have sex with men users of dating apps in Brazil
ABSTRACT Introduction: The elderly population is increasingly benefiting from recent technological advances. In this scenario, geolocation-based dating applications provide a viable alternative for finding partners in a practical and timely manner, but may be accompanied by certain risk behaviors for HIV infection. Although there are considerable number of
Braz J Infect Dis. Publicado em: 25/11/2019
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9. LOW EFFICIENCY IN THE USE OF RESEARCH AND DEVELOPMENT RESOURCES IN BRAZILIAN PUBLIC RESEARCH ORGANIZATIONS: CAUSAL CHAINS ANALYSIS1
O paradigma da Inovação Aberta trouxe desafios adicionais ao já complexo cenário brasileiro de CT&I de recursos escassos e políticas públicas ineficazes. As Organizações de Pesquisa Pública (OPPs) enfrentam obstáculos em relação à limitação imposta por sua natureza pública, leis e regulamentos complexos, estrutura tecnológica e organizaciona
REAd. Rev. eletrôn. adm. (Porto Alegre). Publicado em: 25/11/2019
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10. Interplay between Near-Field Properties and Au Nanorod Cluster Structure: Extending Hot Spots for Surface-Enhanced Raman Scattering
Materials science has observed a continuous increase in the use of metal nanoparticles in a wide range of studies, from fundamental physics to technological applications such as photocatalysis and optical communication devices. This broad scope has the same fundamental origin, the localized surface plasmons, whose excitation leads to strong light confinement
J. Braz. Chem. Soc.. Publicado em: 24/10/2019
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11. PARTICLE IMAGE VELOCIMETRY FOR ESTIMATING THE YOUNG’S MODULUS OF WOOD SPECIMENS
ABSTRACT Proposing technological innovations in the investigation of the structure and behaviour of wood is important to optimize its use. The assimilation of methods diffused in other areas, such as particle image velocimetry (PIV), can allow a rich range of information for different aspects. The aim of this study was to estimate the Young’s modulus usin
CERNE. Publicado em: 09/09/2019
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12. Repensar a comunicação com Raymond Williams: estrutura de sentimento, tecnocultura e paisagens afetivas
Resumo Neste texto, indicamos a importância da hipótese cultural de estrutura de sentimento, de Raymond Williams, para as discussões e análises que tomam a noção de historicidade como decisiva para as reflexões em torno das práticas comunicativas e culturais. Partimos do reconhecimento de que tal noção permite levar em consideração distintas temp
Galáxia (São Paulo). Publicado em: 22/08/2019