Group items tagged Author - YES SciJourn

shared by Daphne Emrick on 19 Jul 10 - No Cached

Among teens in the USA, the percentage who have had sexual i
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tercourse or say they'd be pleased if they or their partner were to get pregnant hasn't changed much since early in the decade, and there appears to be a growing acceptance of having babies outside marriage, a government report
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said Wednesday. From 1995 to 2002, "it was pretty much across-the-board improvements in those risk factors," says lead author Joyce Abma, a statistician at the Centers for Disease Control and Prevention's National Center for Health Statistics. "It is a source of concern to see that forward movement kind of stalling
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...1 more annotation...
Based on in-person interviews with 1,381 girls and 1,386 boys ages 15 to 19 in 2006-2008, more than four in 10 never-married teens in the USA have had intercourse at least once, Abma and her co-authors estimate. That's a slight drop from 2002, the last time the National Survey of Family Growth was conducted, but it was not statistically significan
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shared by Marquise Middleton on 01 Aug 12 - No Cached

shared by James Dixon on 12 Jul 10 - Cached

shared by James Dixon on 12 Jul 10 - Cached

shared by Damonte Johnson on 30 Jun 10 - Cached

The amount of energy in the noise and the damage it can do to your hearing increases very rapidly as it gets louder. In fact, noise energy doubles for every 3 decibels (3dB) increase in the loudness of the sound - and 3dB is such a small increase in loudness that you probably wouldn't even notice it.
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What sort of noise causes the harm? For young people in particular, the most dangerous noise is amplified music, for example in gigs and clubs. Headphones, car stereos and mobile phones are also having a bad effect on the hearing of young people.
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Research shows that 25% of people listen to headphones at a level that will cause hearing damage. Follow the 60/60 rule - don't have your player above 60% of the maximum volume, and don't listen to it for more than 60 minutes at a time.
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...3 more annotations...
One study suggests that listening to headphones at 80% for 90 minutes a day can lead to hearing loss. The authors say that this can take years for the damage to show up, so young people might not notice a loss of hearing until they are in their late 20s. At 100% for only five minutes you could do damage.
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dulled hearing difficulty in understanding speech feeling full inside your ears ringing or high-pitched noise in your ears
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In night clubs - where much of the damage is done - do not stay long, don't go too often and keep well away from the loudspeakers - or go somewhere else where the music is not so loud.
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shared by Gabrielle Gant on 28 Jul 11 - No Cached

The authors found smartphone users have developed what they call "checking habits" -- repetitive checks of e-mail and other applications such as Facebook. The checks typically lasted less than 30 seconds and were often done within 10 minutes of each other.
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shared by Korry Busch on 30 Jun 11 - No Cached

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