Human subject studies are performed to validate and refine the general-purpose luminance to brightness (tone) mapping algorithm of a software program called pcond. Through survey questionnaires, subjects compare a rendered image displayed on a video monitor with a scale-model representation of an identical space incorporating the full dynamic range of the luminous environment typical of office ...

Hospitals, everywhere, are considered heavy energy consumers. Hospital Intensive Care Unit spaces pose a special challenge, where design guidelines requires the provision of external windows for daylighting and external view. Window protection strategies could be employed to reduce energy loads without detriment effect on comfort or health care. This paper addresses the effectiveness of using v...

The ideology behind healing is a psychological and spiritual concept of health. Over the past few decades, the integration of a healing environment into medicine has taken a more holistic approach, and has transformed the hospital atmosphere into an exhilarating place, which affects both staff and patients’ wellbeing. Investigators have revealed that visual stimulation of nature, natural lighti...

This paper suggests a method how to predict electric lighting energy savings for photocell controls in daylit spaces taking manual blind control into account. The method predicts lower but supposedly more “realistic” lighting energy savings than conventional simulation approaches. On the other hand, predicted savings are larger than those predicted by ASHRAE 90.1 power adjustment factors. The m...

Architects must consider an entire year's worth of solar positions and climate data to design buildings with adequate daylight and minimal glare. However, annual simulations are time-consuming and computationally expensive, which makes them difficult to integrate into iterative design processes. In this paper, we compare the performance of several RADIANCE-based dynamic daylighting simulation m...

Vitality proficient, expense sparing inhabitance, planning and more regularity control the passive shading of interior lighting, a creative reasonable configuration methodology of rooftop solar PV module structure outline is presented here. This paper is centered to build up the utilization of inactive sun oriented shading systems for sunshine inside lighting to create a high visual level by co...

Daylight in buildings is both aesthetically pleasing and a sustainable means of offsetting costs for space conditioning and electric lighting. However, poor use of daylight can cause glare that impedes worker productivity. Traditional means of predicting lighting levels for indoor spaces through simulation are timeconsuming, which inhibits exploration of daylighting potential in new buildings. ...

Light diffusers for daylighting applications should have a substantial diffuse transmittance with the forward scattered light distributed as isotropically as possible. We consider the possibility of using pigmented polymer foils for this purpose and propose a method for their theoretical optimization. The amount of electromagnetic energy transmitted through a particulate film illuminated with u...

Transparent refractive-index matched micro (TRIMM) particles have proved to be an excellent scattering component for use in translucent sheets. Measurements of hemispheric transmittance and reflectance versus angle of incidence, as well as angle-resolved studies of such translucent sheets, have been carried out to complement earlier published hemispheric reflectance and transmittance spectral m...

Enhanced control of diffraction through transparent substrates is achieved via disordered gratings in a silica sol-gel film. Tailoring the degree of disorder allows tuning of the diffractive behavior from discrete orders into broad distributions over large angular range. Gratings of optical quality are formed by silica sol-gel nanoimprint lithography and an optical setup for the measurement of ...