Zoe Caira wears a personal light-measuring device, called a Daysimeter, to monitor her rest and activity patterns and the amount of circadian light -- short-wavelength (blue) light -- reaching her eyes. Credit: Rensselaer Polytechnic Institute
Rensselaer Polytechnic Institute recently conducted a field study to learn the effects of morning light on teenagers' sleep cycles. They concluded that a lack of exposure to early morning light can result in a 30-minute delay in the onset of sleep.
"If you remove blue light in the morning, it delays the onset of melatonin, the hormone that indicates to the body when it's nighttime," explains Dr. Figueiro. "Our study shows melatonin onset was delayed by about 6 minutes each day the teens were restricted from blue light. Sleep onset typically occurs about 2 hours after melatonin onset."
The study findings should have significant implications for school design. "Delivering daylight in schools may be a simple, non-pharmacological treatment for students to help them increase sleep duration," concludes Dr. Figueiro.
The new research has applications for more than 3 million shift workers and Alzheimer's patients who suffer from lack of a regular sleep pattern.
Studies have shown that this lack of synchronization between a shift worker's rest and activity and light/dark patterns leads to a much higher risk of cardiovascular disease, diabetes, seasonal depression and cancer over decades.
In 1958 in an Illinois creek bed, an amateur fossil collector named Francis Tully discovered the fossilized remains of a bizarre creature that resembled a mollusk, insect, and worm yet was none of those things. Since then, thousands of 300 million-year-old fossilized “Tully Monsters” have turned up and the creature was officially named as the […]
Elenco’s Night ‘n Day Mechanical Globe uses a system of translucent, exposed gears to rotate an internally illuminated globe that displays the seasonally adjusted, real-time night/day terminator as it spins.
Wireless headphones aren’t a mind-bending thing anymore now that Apple made them the standard thing-to-be-outraged-over-in-the-new-iPhone fare, thereby killing the cool factor. But let’s be reasonable here. Wires really are a pain when you’re running, trying to get off the bus, or even just standing up from your desk. Wireless headphones make sense, they just don’t […]
Python is such a commonly used general-purpose programming language and features such (comparatively) simple syntax, that most veteran programmers consider it an excellent foundation for aspiring programmers. The Python 3 Bootcamp Bundle packs over 30 hours of training into nine courses to build that foundation for you.If you’ve never had any introduction to code at […]