energy conservation in buildings plays a vital role for sustainable development of societies and nations. although, newer buildings in developing nations are being constructed using energy conservation approach, existing buildings have higher energy demand to meet the desired comfort. excessive energy demand for cooling the built environment is a major problem over most of the arid climatic zon...

abstract the growth is a one of biological aspects of fishes and is a good index in order to determine of health of these population. the aim of this study was to investigate the effect of different color lights on condition factor and weight- length relationships (lwr) of rainbow trout. fertilized eggs of fish were kept under light conditions, 14h light and 10h dark for 5 months at seven light...

There is an increasing number of applications for UV and visible radiation in medical therapy and diagnosis, and in areas related to cosmetology. All these applications pose risks of unwanted exposure of the staff executing the treatment and the patients. A new survey in Norwegian hospitals accounting for the status of radiation protection in phototherapy will be presented. The survey concludes...

Over the last twenty years, significant progress has been made in the technical development of night vision equipment. There are a number of different approaches. Image intensifiers amplify ambient light so that it can be presented via phosphor displays including those embedded within night vision goggles. This technology relies upon light from the stars or moon, as well as from man-made source...