OBJECTIVES To test whether the addition of melatonin to bright-light therapy enhances the efficacy in treating rest-activity (circadian) disruption in institutionalized patients with Alzheimer's disease (AD). DESIGN Randomized, controlled trial. SETTING Two nursing homes in San Francisco, California. PARTICIPANTS Fifty subjects (mean age 86) with AD. INTERVENTION Experimental subjects r...

This study investigates the optical design of planar curved LED end-lit light bars using v cuts as light-diverting structures. The application of LEDs in automotive lighting has become popular, especially in signal lamps and daytime running lamps. Most designs adopt a direct back light using arrays of LEDs with diffusive coupling optics, which often causes problems such as low uniformity, glari...

STUDY OBJECTIVES Previous studies have demonstrated short-wavelength sensitivity for the acute alerting response to nocturnal light exposure. We assessed daytime spectral sensitivity in alertness, performance, and waking electroencephalogram (EEG). DESIGN Between-subjects (n = 8 per group). SETTING Inpatient intensive physiologic monitoring unit. PARTICIPANTS Sixteen healthy young adults ...

Advantages of light-optical devices (LEDs) were investigated in the article. Based on research, special attention is paid to prospects development led headlights. Complicacy car electrical equipment leads increase indicated efficiency and energy storage capacity electric generators, yield increase, decrease labor intensity maintenance operation reconstruction. On other hand, innovations scienti...

Increasing ambient temperature reorganizes the Drosophila sleep pattern in a way similar to the human response to heat, increasing daytime sleep while decreasing nighttime sleep. Mutation of core circadian genes blocks the immediate increase in daytime sleep, but not the heat-stimulated decrease in nighttime sleep, when animals are in a light:dark cycle. The ability of per(01) flies to increase...

OBJECTIVE This study investigated variables that may contribute to motorcycle conspicuity within a high-fidelity simulated environment. The variables included motorcycle lighting, vehicular daytime running lights (DRLs), and age of the driver of the other vehicle. BACKGROUND Research suggests that decreased levels of conspicuity associated with riding a small two-wheeled vehicle reduce the ab...

In ‘Comments on Theeuwes and Riemersma’s Revisit of Daytime Running Lights’ Williams and Farmer ( 1996) comment on a paper we published in Accident Analysis and Prevention. In this paper we show that the original claim by Andersson and Nilsson ( 198 1) that the nationwide implementation of Daytime Running Lights (DRL) in Sweden resulted in a reduction of multiple daytime accidents was not warra...

We had previously reported on the effect of exposure to light on the human digestive system: daytime bright light exposure has a positive effect, whereas, evening bright light exposure has a negative effect on the efficiency of dietary carbohydrate absorption from the evening meal. These results prompted us to examine whether the light intensity to which subjects are exposed in the evening affe...