Results 261 to 270 of about 156,448 (285)

A daylight factor integrator

Journal of Scientific Instruments, 1931
This instrument determines mechanically the illumination at a point on a horizontal surface due to the direct light from the sky visible at that point. The instrument is set up at the point, and a telescope incorporated in it is made to traverse the boundary of the visible sky.
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A simple daylight factor meter

Journal of Scientific Instruments, 1954
A simple daylight factor meter, based on a commercially available foot-candle meter, is described. An adjustable sensitivity device enables the reading to be set to a fixed value when the instrument is directed towards the open sky, thus fixing the denominator of the daylight factor fraction.
J Longmore, R G Hopkinson
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Factors Affecting Transcutaneous Bilirubin Measurement: Effect of Daylight

Pediatrics International, 1991
The purpose of this study was to determine whether daylight might affect the accuracy and reliability of TcB measurement at the forehead and sternum. One hundred and seven full‐term newborn infants were divided into two groups. Babies in group I (N = 59) were kept near the window which was sometimes directly exposed to daylight, and babies in group II (
Y, Yamauchi, I, Yamanouchi
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Evaluation of Daylight regulations in buildings using daylight factor analysis method by radiance

Energy for Sustainable Development, 2019
Abstract Daylighting plays a key role in occupants' thermal and visual comfort as well as developing a sustainable environment. Windows size, shape, and the relevant room dimensions are three major factors that affect the quality and quantity of daylighting.
Salah Vaisi, Farzam Kharvari
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Daylight factor prediction in atria building designs

Solar Energy, 2004
This paper investigates the main characteristics of the atrium and their influence on the daylight conditions in the adjoining space and on the atrium floor. The shape of the atrium and its orientation to the sun, the transmittance of the roof, the reflectivities of the atrium surfaces and the glazed areas are important parameters in the daylighting ...
B. Calcagni, M. Paroncini
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Finite Element Method of Determining Daylight Factor

Journal of Optics, 2000
The paper describes the theoretical basis of determining Daylight Factor by applying Finite Element Method (FEM). This method is quite straight forward, requires less number of simplifying assumptions and yields a good accuracy of calculation. The theoretical results are then compared with the test results measured in a scale model under an artificial ...
B. Ray, S. R. Bandyopadhyay
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Distribution of Daylight Factor in Classrooms

Advanced Materials Research, 2014
The study capability of pupils depends on many factors. One of the factors is the level and the quality of daylighting in classrooms. The daylighting quality is particularly important for very young pupils in primary schools and nurseries. This article deals with natural light in classrooms with different school equipment and furniture and various ...
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Portable photoelectric daylight factor meter

Journal of Scientific Instruments, 1936
The practical conditions controlling the accuracy of measurement of daylight factor are considered in the first section of the paper. A simple portable photoelectric daylight factor meter, incorporating two rectifier photoelectric cells, is described. The direct range of daylight factor measurable by the meter is from 0.03 per cent to 2.5 per cent. The
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Architectural Models for Measurement of Daylight Factor

Applied Mechanics and Materials, 2016
Daylight factor is one of the physical parameters affecting indoor environmental. We can determine this factor in many ways. The main ways are computational methods, in situ measurements and finally measurements in architectural models. Measurements in models enable us comparison both measurements under real sky and under artificial sky.
Daniela Bosova, Lenka Prokopova
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The Daylight Factor Concept and the Lumen Method of Daylight Prediction

Architectural Science Review, 1963
(1963). The Daylight Factor Concept and the Lumen Method of Daylight Prediction. Architectural Science Review: Vol. 6, No. 2, pp. 67-81.
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