Subjective sleep feelings and motor activity were measured in seven healthy elderly subjects for 6 days. The subjects were exposed to bright light (6000 lux) for 30 min in the morning or instructed to sit in front of a desktop lighting device without light. The average level of motor activity during the night was significantly decreased in the bright light condition, compared with the controlled condition. However, daytime motor activity did not show significant differences between the two conditions. From these findings, even a short duration of morning bright light is effective in maintaining sleep without changing daytime activity.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1111/j.1440-1819.1998.tb01059.x | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Void spot assay (VSA) noninvasively evaluates urination. VSA is often not performed in rats due to difficulty analyzing larger papers compared with mouse. This study optimizes VSA for rats by comparing post-assay visualization techniques: bright field light (BF), ultraviolet light (UV), and ninhydrin spray (N).
View Article and Find Full Text PDFDosimetry Assessment of Potential Hazard from Visible Light, Especially Blue Light, Emitted by Screen of Devices in Daily Use.
Clin Cosmet Investig Dermatol
January 2025
Photodermatology Unit, Department of Dermatology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
Visible light has been considered to have minimal impact on the skin. However, the increasing use of electronic devices has led to a significant increase in exposure to visible light, especially blue light. We measured the irradiance (mW/cm) and estimated dose (J/cm) of visible light and blue light emitted from various electronic devices including smartphones, tablets and computers.
View Article and Find Full Text PDFDesigning Robust Quasi-2D Perovskites Thin Films for Stable Light-Emitting Applications.
Adv Mater
January 2025
Department of Physics, SUNY University at Buffalo, Buffalo, NY, 14220, USA.
Quasi-2D perovskite made with organic spacers co-crystallized with inorganic cesium lead bromide inorganics is demonstrated for near unity photoluminescence quantum yield at room temperature. However, light emitting diodes made with quasi-2D perovskites rapidly degrade which remains a major bottleneck in this field. In this work, It is shown that the bright emission originates from finely tuned multi-component 2D nano-crystalline phases that are thermodynamically unstable.
View Article and Find Full Text PDFAn approach to energy conservation in lighting systems using luminaire-based sensor for automatic dimming.
Sci Rep
January 2025
School of Engineering, King Mongkut's Institute of Technology Ladkrabang, Bangkok, 10520, Thailand.
Lighting systems account for a significant proportion of energy consumption in buildings. Therefore, energy conservation within these systems can greatly enhance overall building energy efficiency. This study proposes a control strategy for LED lamps by adjusting lighting intensity and improving the performance of electric luminaires.
View Article and Find Full Text PDFForty years of seasonal affective disorder.
Psychiatr Pol
October 2024
Uniwersytet Medyczny w Poznaniu.
In 2024, we observe the fortieth anniversary of the publication, where, for the first time, the term of Seasonal Affective Disorder (SAD) was used. Presently, SAD is regarded as a special category of mood disorder. In the American Diagnostic and Statistical Manual of Mental Disorders, fifth edition (DSM-V), the seasonality makes a specifier, "with seasonal pattern", both for recurrent depression or Major Depressive Disorder (MDD), and for Bipolar Disorder (BD).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!