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Resultados 1081-1100 de 2397
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A 'feasibility space' as a goal to be achieved in the development of new technologies for converting renewable energies
(2020) [Artigo de periódico]This method article proposes the establishment of a feasibility space as an objective to be achieved during the development of new technologies to convert energy from renewable resources. The feasibility space can also be ... -
Feasibility study of a hydro PV hybrid system operating at a dam for water supply in southern Brazil
(2015) [Artigo de periódico] -
Feasibility study of a PV hydro hybrid system, with photovoltaic panels on floating structures
(2018) [Artigo de periódico]This paper intends to contribute, presenting a feasibility study for the implementation of a PV hydro hybrid system in Laranjeiras dam, in southern Brazil, with photovoltaic panels on floating structures. The study was ... -
Feedback imediato em ambientes informatizados através de vídeos na disciplina de matemática
(2018) [Artigo de periódico]No contexto escolar, a avaliação permeia todo o processo ensino-aprendizagem. Entretanto, muitas vezes a avaliação tem simplesmente o caráter comparativo e classificatório, sem atender às necessidades individuais dos alunos ... -
FEM updating for damage modeling of composite cylinders under radial compression considering the winding pattern
(2022) [Artigo de periódico]This work aims at developing a strategy to obtain damage evolution parameters of wound cylinders to verify the influence of the winding pattern on them. First, a detailed description of the pattern generation is presented. ... -
Field parametric geostatistics : an alternative to tackle gold grade estimations
(2019) [Artigo de periódico]High anomalous grades are very common in gold deposits, whose presence requires careful treatment to prevent overestimation of metal content. Mineral resource analysts have worked on the estimation of several gold deposits, ... -
Filme autosuportado de polianilina desdopada para aplicações anticorrosivas
(2012) [Artigo de periódico]Os polímeros intrinsecamente condutores (PIC), como a polianilina (PAni), têm sido estudados com alternativa em filmes protetores de metais oxidáveis contra a corrosão. Dada a dificuldade de fusão ou dissolução da PAni ... -
O financiamento da manutenção e operação do sistema de drenagem urbana de águas pluviais no Brasil : taxa de drenagem
(2013) [Artigo de periódico]Evitar as inundações nas cidades exige um fluxo de receitas para financiar o sistema de drenagem pluvial urbano. Discute-se a recuperação parcial dos recursos públicos gastos na operação e manutenção do sistema local, ... -
Finite element study of effective width in steel-concrete composite beams under long-term service loads
(2018) [Artigo de periódico]In this work, a finite element-based approach is presented to study the effective width variation in non-pre-stressed steel-concrete beams under the serviceability stage, including time dependent effects such as concrete ... -
Flocculation of fine fluorite particles with Corynebacterium xerosis and commercial long chain polymers
(2002) [Artigo de periódico]This work aimed to study, comparatively, the flocculation of fluorite particles with Corynebacterium xerosis cells and three commercial long chain polymers. Best flocculation results were obtained with cells of C. xerosis ... -
Flooding and drying simulation on floodplains using a 2D HEC-RAS model : a Sinos river case study
(2022) [Artigo de periódico]The HEC-RAS software reaches its 6.0.0 version in May of 2021, introducing new computational tools to its users. Among these new tools, HEC-RAS is capable of simulating spatially varied rain and evaporation data by grid, ... -
Flood mapping employing local, regional and global scale modeling methods for the Uruguay river
(2020) [Artigo de periódico]The delimitation of flooded areas is important information for natural disaster management, environmental impact prediction and for territorial planning. Flooding occurs when water levels overflow the limits of a river’s ... -
Flood risk index mapping of an area downstream of a dam in case of a break
(2023) [Artigo de periódico]We aimed to evaluate the flood risk index due to the hypothetical break of the São Bento dam (SC, Brazil). The risk index was obtained by combining the hazard and vulnerability indices. The hazard index was obtained by ... -
Flow in the wake of wind turbines : turbulance spectral analysis by wind tunnel test
(2016) [Artigo de periódico]The interaction between the incident wind and wind turbines in a wind farm causes mean velocity deficit and increased levels of turbulence in the wake. The turbulent flow is characterized by the superposition of wind turbine ... -
Fluctuating velocity measurements in the turbulent wake of a wind turbine model
(2018) [Artigo de periódico]An experimental study of the turbulent wake of a wind turbine model was realized at the “Joaquim Blessmann” wind tunnel of the UFRGS. The turbine model was developed at the Universidade de Caxias do Sul and it represents ... -
Fluids associated with the Caxias mesothermal gold mineralization, São Luis Craton, northern Brazil: a fluid inclusion study
(2000) [Artigo de periódico]The Caxias deposit is situated in the Gurupi Auriferous Province of the Paleoproterozoic São Luís Craton, northern Brazil. It is a lode-type gold mineralization associated with a narrow, steeply dipping, NE-trending, shear ... -
Fluorine-free mould slags for slab casting : utilisation of the hot thermocouple technique to build TTT diagrams
(2012) [Artigo de periódico]The elimination of fluorine from slags is necessary because F-bearing materials pollute the environment and cause machinery corrosion at steelworks. Regarding the development of F-free mould slags for slab casting, the ... -
Flutuação de pressão em ressalto hidráulico
(1997) [Artigo de periódico]O ressalto hidráulico, que se observa em uma bacia de dissipação, é um fenômeno fortemente turbulento que provoca grandes flutuações de pressão agindo sobre o fundo. Estas flutuações podem levar à destruição do dissipador ... -
Fontes de informação em patentes análise das características das bases Derwent Innovations Index, ORBIT, INPI, Google Patents e PatentScope com base na produção tecnológica da UFRGS
(2019) [Artigo de periódico]A pesquisa explora as diferentes bases de dados depositantes de patentes — importantes fontes de informação para a realização de estudos patentométricos — e propõe-se a investigar as características inerentes ao processo ... -
Formação da eflorescência em cerâmica vermelha : fatores de influência no transporte dos íons SO4-2 e Ca+2
(2011) [Artigo de periódico]Investigou-se o deslocamento dos íons SO 2- e Ca2+ em uma cerâmica vermelha, simulando o processo de eflorescência. Foram moldados corpos cerâmicos (70 x 27 x 9 mm3) por extrusão a vácuo, formulados com diferentes teores ...