Blindsight, a movie about Tibetan blind kids who climb 21,000+ feet up a Himalayan mountain.The story of Erik Weihenmayer, first blind mountain climber to reach the summit of Everest (and a lot of other peaks, too).
Sunday, January 18, 2009
Blind mountain climbers
Blindsight, a movie about Tibetan blind kids who climb 21,000+ feet up a Himalayan mountain.The story of Erik Weihenmayer, first blind mountain climber to reach the summit of Everest (and a lot of other peaks, too).
Monday, March 24, 2008
So you think your life is crappy...
This American Life plays Just One Thing Missing, a story about a smart kid caught between a rock and a hard place because of the American immigration quagmire.
Monday, March 10, 2008
Answering the age old question...
Do you lose more heat from your head than other parts of your body?
No. At rest, your head loses the same amount of heat as a comparably exposed portion of your body -- in this case about 7%.
But wait...
Yes. When you start to exercise and before you sweat, your head vents up to 55% of your body heat. At some point, your head gets too hot, so your body sends blood to your skin to cool down your head -- sending your heat loss back down to 7%.
Shivering hypothermia victims don't get the benefit of vasodilation (cooling through the widening of blood vessels, in this case, in the skin) and thus lose 55% of their body heat constantly through their head (put a hat on 'em!). Wet heads also lose more heat, so keep your head out of the water if you're cold.
In the end, 7% is still a lot of heat loss considering that the rest of our body (besides our hands) are covered up when the weather is cold. So if you wear a hat, you'll still feel warmer than without one!
Source: Wilderness Medicine
No. At rest, your head loses the same amount of heat as a comparably exposed portion of your body -- in this case about 7%.
But wait...
Yes. When you start to exercise and before you sweat, your head vents up to 55% of your body heat. At some point, your head gets too hot, so your body sends blood to your skin to cool down your head -- sending your heat loss back down to 7%.
Shivering hypothermia victims don't get the benefit of vasodilation (cooling through the widening of blood vessels, in this case, in the skin) and thus lose 55% of their body heat constantly through their head (put a hat on 'em!). Wet heads also lose more heat, so keep your head out of the water if you're cold.
In the end, 7% is still a lot of heat loss considering that the rest of our body (besides our hands) are covered up when the weather is cold. So if you wear a hat, you'll still feel warmer than without one!
Source: Wilderness Medicine
Wednesday, February 20, 2008
Must have Zotero
If you're doing research and need to organize your references, look no further: Zotero is the current best option. Tried Endnote? Refworks? Bookmark tagging software? They all fall short of Zotero. Why?
Zotero is a plugin for Firefox2.0 which means it's with you whereever you go. It doesn't just bookmark sites, it allows full content screen capture. It's got highlighting, notetaking, tagging, and a variety of other annotation features. And by far, it's depth in organizing your references will make them easier for you to find. Finally, it creates bibliographies and source citations in Word and soon, Open Office.
If this doesn't make sense to you, and you're not sure you want or will use Zotero, ask yourself the following questions. Have you ever written a research paper with source citations? Have you ever gone to a web site and bookmarked the site to come back later and find the site gone? If yes, you need Zotero.
Read Scott McLemee's review in Inside Higher Ed.
Watch this simple Zotero tour to be dazzled beyond belief!
Zotero is a plugin for Firefox2.0 which means it's with you whereever you go. It doesn't just bookmark sites, it allows full content screen capture. It's got highlighting, notetaking, tagging, and a variety of other annotation features. And by far, it's depth in organizing your references will make them easier for you to find. Finally, it creates bibliographies and source citations in Word and soon, Open Office.
If this doesn't make sense to you, and you're not sure you want or will use Zotero, ask yourself the following questions. Have you ever written a research paper with source citations? Have you ever gone to a web site and bookmarked the site to come back later and find the site gone? If yes, you need Zotero.
Read Scott McLemee's review in Inside Higher Ed.
Watch this simple Zotero tour to be dazzled beyond belief!
Sunday, December 2, 2007
One Laptop per Child
Well-designed, cheap, light, robust and a good cause. What more could you want in a laptop?
Check out Nicholas Negroponte's, a professor at MIT, ambitious program. Better yet, get one for yourself and give one to a child with the G1G1 program!
Links:
Laptop.org
CBS 60 minutes news story
Check out Nicholas Negroponte's, a professor at MIT, ambitious program. Better yet, get one for yourself and give one to a child with the G1G1 program!
Links:
Laptop.org
CBS 60 minutes news story
Friday, November 30, 2007
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