Medical: Natural light can disturb teen’s sleep patterns – Seattle Times


TheMedGuru
Medical: Natural light can disturb teen's sleep patterns
Seattle Times
Researchers at the University of Pennsylvania School of Medicine in Philadelphia set up a sleep-restriction test in a group of 159 adults, each lasting five ...
Sleep Deprived? Here's How to RecoverU.S. News & World Report
Hard to make up for chronic sleep lossUPI.com
Study says weekend sleep is good for brainabc7.com
RTT News -CBS News -NewsOXY
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Challenger Center Prepares for Desert RATS 2010

NASA Desert RATS 2010: Challenger Center Hardware Arrives at JSC

"As was the case in 2009, Green Trail Energy has partnered with the Challenger Center for Space Science Education to provide logistical and technical support for Education and Public Outreach to be done at NASA's annual Desert RATS activity. The GSW7000, whose utilization is being donated to this activity by Green Trail Energy, can provide 2.4 KW of wind power and 4.4 KW of solar power. With its extendable 110 foot tower, it can also serve as a cell phone node and provide WiFi and WiMAX connectivity. This unit can be deployed by one person and be operational 30 minutes after arrival at a remote location. The entire unit compacts into the volume of a standard shipping container and can be pulled by a 1 ton pick up truck."

The Sun rises again | Bad Astronomy

Our nearest star has woken up for real and for sure. After several years of stubborn silence, the Sun has unleashed several fairly big explosions of material. Called Coronal Mass Ejections, or CMEs, these gigantic events blast out hundreds of billions of tons of matter into space. They create vast interplanetary shock waves, and when they reach the Earth can cause all sorts of havoc. They are different from solar flares, but have similar origins in the Sun’s magnetic field.

sdo_cme_aug2010

NASA’s recently-launched Solar Dynamics Observatory caught the action mid-eruption. This image shows million-degree-hot gas blasting off the surface, entangled in the Sun’s strong magnetic field. The most recent CMEs probably won’t do much more than give us pretty aurorae — they’ve already been spotted — which is good (worse effects are the loss of satellites and potential blackouts on Earth). In fact, if you live in the far north or south you may be able to see the light show.

You can read more about this at Orbiting Frog, SpaceWeather (with pictures!), Universe Today, and pretty much every other space blog on the planet. I’m probably too far south and in far too light-polluted skies to see, but give it a try if you can. Aurorae can be quite spectacular.

But if you miss it, don’t fret: I’m sure we’ll get lots of other opportunities. The Sun is gearing up for the peak of its cycle in the next three years or so, and there will be plenty of chances to watch as our sky reacts.

Image credit: NASA/SDO


How to Measure the Power of a Transformer

I am making a tube amplifier and I came across this transformer that has just the right 320-0-320 v (I need about 320 dc) and the 6v for the heater. Now the problem is: how do I know if it is going to give me enough current? The amp is a clone of a Dynaco st35, and it provides 15 watt per channel. T

Reference Designators in Flight Assembly

Does anyone know what document specifies how assemblies are referenced in flight equipment? For instance, in avionics you might have a connector on a box, J1. If the designator for the box was A1, then the connector would be A1/J1. If the box is located in a rack, then the connector might be

NCBI ROFL: Beauty week: Beauty and the teeth. | Discoblog

2603413014_559218e6d7_bBeauty and the teeth: perception of tooth color and its influence on the overall judgment of facial attractiveness.

“This study investigated the influence of changes in tooth color on judgments of facial attractiveness. Standardized photographs were presented, and teeth were digitally manipulated (main categories: original, whitened, colored; filler category: impaired). Participants were instructed to evaluate the faces for attractiveness.Additionally, they were asked to name facial features they found either positive or negative with regard to attractiveness. Whitened teeth were mentioned more often in a positive way but did not improve participants’ assessment of attractiveness. A colored tooth did not attract attention, and the attractiveness judgment did not worsen. Tooth color is thus not necessarily perceived and does not have a major impact on facial attractiveness.”

beauty_white_teeth

Photo: flickr/david_shankbone

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How Humans Invented Themselves | The Intersection

Here’s an excerpt from my third post at the Techonomy blog–which is on how technology and humanity are “coproduced.” You can read the full post here.

At the official opening plenary session of Techonomy, Kevin Kelly–a co-founder of Wired, and author of the forthcoming book What Technology Wantsmade what I considered a pretty profound remark. “The first animal we domesticated was humans,” Kelly said. He went on to describe how we “physically changed ourselves through agriculture, through cooking…we’re both masters of technology and also the children of technology.”

catching-fireKelly sounded, in this statement, as though he’d read a book that I recently recommended and blogged about, and whose author I interviewed for BBC 2’s “The Culture Show”: Harvard anthropologist Richard Wrangham’s Catching Fire: How Cooking Made Us Human. It’s hard to think of a better example than cooking if you want to show how human beings and technology are “co-produced,” which I take to be Kelly’s argument.

In Wrangham’s account, our ancestors discovered fire and cooking at some hard-to-fix point in the past—but farther back than most scientists had previously assumed. At this point, the power of this innovation then dramatically drove human evolution.

Cooking food was a game changer….READ ON.