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SSS 2009-03-06

时间:2010-05-17 06:20来源:互联网 提供网友:木渐浅。   字体: [ ]
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This is Scientific American's 60-Second Science. I'm Christie Nicholson. This will just take a minute.

 

Ticking clock indeed.  Already it’s time to turn clocks forward one hour this Sunday morning, March 8th.

 

Two years ago Congress ordered Daylight Saving Time to launch three weeks early, in an effort to save energy. More evening light may mean less electricity used.

 

But it also means more blues1 for those prone2 to winter depression. The change actually sets us back to mid-January in terms of morning light, according to Michael Terman, a biological rhythms expert at Columbia University.

 

Light is what preps us for waking, alerting the brain to increase body temperature and cortisol, and decrease melatonin. When we’re forced to wake in darkness, we feel like it’s the middle of the night, and from our body’s perspective it is, and we’re tired.

 

Terman’s recent research shows there is more depression on the western edges of time zones in the U.S., where the sun rises later.

 

Simplest way to combat this, says David Avery, professor of psychiatry3 at the University of Washington, is to use a dawn simulator, a device that creates gradual light, or program your bedside lamp to turn on about 20 minutes before you wake up.

 

Thanks for the minute for Scientific American's 60-Second Science. I'm Christie Nicholson.

 


点击收听单词发音收听单词发音  

1 blues blues     
n.抑郁,沮丧;布鲁斯音乐
参考例句:
  • She was in the back of a smoky bar singing the blues.她在烟雾弥漫的酒吧深处唱着布鲁斯歌曲。
  • He was in the blues on account of his failure in business.他因事业失败而意志消沉。
2 prone 50bzu     
adj.(to)易于…的,很可能…的;俯卧的
参考例句:
  • Some people are prone to jump to hasty conclusions.有些人往往作出轻率的结论。
  • He is prone to lose his temper when people disagree with him.人家一不同意他的意见,他就发脾气。
3 psychiatry g0Jze     
n.精神病学,精神病疗法
参考例句:
  • The study appeared in the Amercian science Journal of Psychiatry.这个研究发表在美国精神病学的杂志上。
  • A physician is someone who specializes in psychiatry.精神病专家是专门从事精神病治疗的人。
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