employees' perception of lighting conditions in manufacturing plants: associations with illuminance measurements

Employees' perception of lighting conditions in manufacturing plants: associations with illuminance measurements.

BACKGROUND The aims of this study were to evaluate the employees' subjective assessments of different aspects of lighting condition as well as task area illuminance in manufacturing plants. METHODS This field study was conducted between March and May 2013, in three packing plants (Saveh, central Iran). Data were collected by questionnaire and measurement of the task area illuminance levels. D...

Illuminance requirements for emergency lighting

Overall Illuminance Uniformity of IRED Lighting in Nighttime CCTV

LEDs (light-emitting diodes) are superior to the conventional light bulbs and florescent lights in terms of low power dissipation, high efficient and longer lifetime. Therefore, conventional light bulbs are gradually being replaced by LED light bulbs as the next generation lighting source. LEDs are also playing more important roles in industrial applications, such as backlighting in LCD display...

Intelligent Lighting Control Using Correlation Coefficient between Luminance and Illuminance

An intelligent lighting system which provides required illumiancne at an appropriate location is proposed. This system does not have the centralized control device and also it is controlled by each intelligent lighting’s autonomous operation. Also the intelligent lighting system can contribute to energy saving. In this research, a new algorithm is proposed. For rapid converges it uses the corre...

Perception-based Lighting Design

Perception-based lighting design approaches model image quality using a cognitively grounded objective function which is in turn optimized through manipulation of the lighting parameters of a scene. We present, and demonstrate, a detailed implementation of perception-based lighting design, including the application and evaluation of stochastic optimization using genetic algorithms.

the effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)

cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...