Luminous Sources
Mostrando 1-9 de 9 artigos, teses e dissertações.
-
1. Temperature influence on mobility and charge density model of photovoltaic cells
abstract Photovoltaic (PV) devices that capture the energy provided by the sun have great potential as renewable energy sources. However, the input parameters such as the luminous intensity and temperature of the solar cells tend to influence the operating characteristics in the solar panels. The inherent physical processes that cannot be altered limit the e
Rev. Bras. Ensino Fís.. Publicado em: 18/02/2019
-
2. Análise da influência de parâmetros acústicos na inteligibilidade da fala: um estudo em salas de aula de escolas municipais de João Pessoa.
Researchs in the area of environmental comfort conducted in schools reported that, considering the thermophysical variables, the acoustic variable is more important than the other variables, especially in relation to thermal, luminous and indoor air quality variables, since this is the variable that is directly tied to speech intelligibility, with impacts on
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/08/2012
-
3. Study of environment conditions of Arthrospira (Spirulina) platensis culture in tubular photobioreactor using fed-batch process with urea as nitrogen source / Estudo das condições ambientais no cultivo de Arthrospira (Spirulina) platensis em fotobiorreator tubular por processo descontínuo alimentado com uréia como fonte de nitrogênio
The cyanobacterium Arthrospira (Spirulina) platensis, ones of the most studied and cultivated photosynthetic microorganisms in the planet, has a unique biomass composition that includes: high protein content, polyunsaturated fat acids, natural pigments and other substances of interest in food, pharmaceutical and cosmetic industries. Recent studies demonstrat
Publicado em: 2010
-
4. METROLOGICAL CONFIDENCE AND VALIDATION OF SPECTRORADIOMETRIC PROCEDURES FOR THE MEASUREMENT OF LIGHT SOURCES / CONFIABILIDADE METROLÓGICA E VALIDAÇÃO DE PROCEDIMENTOS ESPECTRORADIOMÉTRICOS PARA MEDIÇÃO DE FONTES LUMINOSAS
A avaliação e a caracterização da cor constituem fatores críticos do processo de controle de qualidade de produtos, que também devem atender exigências dos clientes e consumidores finais. A cor de um objeto depende fortemente das características da iluminação. Nesse contexto, a presente pesquisa analisou e comparou os diferentes métodos especifica
Publicado em: 2006
-
5. Hobbes et Gassendi: la psychologie dans le projet mécaniste
Hobbes' and Gassendi's friendship and intellectual affinity constitute a tight thread hard to be untied. Beyond clearly defined convergent views such as the common aversion to Cartesian dualism and innatism and clear divergences in their specific philosophical orientations, the meaning of their often similar trajectories must be precisely clarified. The priv
Kriterion: Revista de Filosofia. Publicado em: 2002-12
-
6. Calculo da iluminação em sintese de imagens atraves de ray-tracing estocastico
This work studies the subject of illumination in realistic image generation with the goal of approaching the problem from the Physical laws envolved in the process, aimming to develop and implement techniques for calculating the illumination in computer generated images. The stochastic ray tracing method, also called distributed ray tracing, simulates the tr
Publicado em: 1993
-
7. Morphology of high-luminosity compact radio sources.
High-dynamic range imaging and monitoring with very-long-baseline interferometry reveal a rich morphology of luminous flat-spectrum radio sources. One-sided core-jet structures abound, and superluminal motion is frequently measured. In a few cases, both distinct moving features and diffuse underlying jet emission can be detected. Superluminal motion seen in
-
8. PHOTOMETER FOR MEASURING THE SCOTOPIC CANDLEPOWERS OF SELF-LUMINOUS OPHTHALMIC TEST OBJECTS
A PHOTOMETER is described with which the scotopic candlepowers of very feeble light sources (down to about 10−9 candle) can be measured. Small spots of radium paint, 2 or 3 mm. in diameter and having candlepowers in the range covered, are now used (Livingston) to plot the dark-adapted visual field, and the present photometer was designed primarily for thei
-
9. Wind-induced plant motion immediately increases cytosolic calcium.
Wind is one of the most unusual and more dramatic of the environmental signals to modify plant development. Wind-stimulated crops are also known to experience considerable reductions in growth and subsequent yield. There is at present no experimental data to suggest how wind signals are perceived and transduced by plant cells. We have genetically transformed