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Monday, April 30, 2012
Friday, April 27, 2012
Thursday, April 26, 2012
Apple CEO Tim Cook Made a Funny! (Updated) [Apple]
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Wednesday, April 25, 2012
U.N. chief to visit Myanmar to encourage reforms
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Tuesday, April 24, 2012
Monday, April 23, 2012
The Most Unbelievably Terrible Police Wanted Composites [Crime]
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Friday, April 20, 2012
Struq Secures $8.5 million From Reed Elsevier, Pentech, Allen & Co
The problem with internet advertising - and there are many - is that while there are plenty of users who interact with ads, the hard part is working out which users are actually the most valuable to advertisers. While the advertising industry normally sends one brand message and blasts it out across all channels, Struq, an advertising platform startup, works out which users show behavioral patterns that make them statistically more likely to purchase. But instead of showing them the one brand message it shows video or display ads most likely to chime with that user. To that end it's attracted the attention of major backers today, with a significant $8.5 million funding round from Reed Elsevier Ventures, Pentech Ventures and Allen & Company LLC.russell pearce russell pearce emergency alert system 2011 election results 11/11/11 11 11 11 activision blizzard
Thursday, April 19, 2012
Canon shows off prototype 30-inch 4K reference display, won't put a price tag on love
With 4K cameras suddenly popping up everywhere we look at NAB 2012, it's little surprise that Canon is showing off this matching 30-inch prototype intended for the very professionals tasked with mastering video shot by its latest hardware. Like the retina display, it produces an effect where no matter how close you're standing it's still impossible to pick out the individual pixels, and easily matched what we'd seen from a prototype 20-inch 4K LCD from Panasonic at CES. The people we spoke to who handled some of the work on Canon's demo footage preferred it to their 2K projectors for the clarity and ability to get pixel accurate representations of the source material, plus it probably fits more easily into a production suite. The big question from all who see this in person is when will it be available and for how much, and while Canon says it's due to ship this year, we're on our own to speculate about the (surely astronomical) price.
Canon shows off prototype 30-inch 4K reference display, won't put a price tag on love originally appeared on Engadget on Tue, 17 Apr 2012 13:51:00 EDT. Please see our terms for use of feeds.
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"Shock jock" Stern lawsuit vs Sirius XM thrown out
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Tuesday, April 17, 2012
Promiscuous queen bees maintain genetic diversity
![[ Back to EurekAlert! ]](http://www.eurekalert.org/images/back2e.gif){kind=small}
Public release date: 16-Apr-2012[ | E-mail |
Share ] Contact: Layne Cameron
layne.cameron@ur.msu.edu
517-353-8819
Michigan State University
EAST LANSING, Mich. By mating with nearly 100 males, queen bees on isolated islands avoid inbreeding and keep colonies healthy.
The results, published in the current issue of PLoS ONE, focused on giant honey bee colonies on Hainan Island, off the coast of China. Since these bees have long been separated from their continental cousins, it was thought that the island bees would be prime candidates for inbreeding as well as having very different genes, said Zachary Huang, Michigan State University entomologist.
"We believed that the island bees would show evidence of the founder effect, or random genetic changes in an isolated population, on a unique sex determination gene from the mainland bees," he said. "At first we were surprised when we couldn't document this effect. Looking at it further, I asked myself, 'Why didn't I think of this before?'"
When compared to bees, humans have a rather simplistic sex-determination process. In females, the two sex-determination chromosomes are the same, and in males the two chromosomes are different. With bees, however, the combinations of complementary sex determination genes, or CSDs, determine the sex and the societal role of the bees.
One particular gene can have alleles the "flavor" of genes. In humans, they dictate hair and eye color. In bees, though, they are responsible for creating females (worker bees), fertile males (that mate with the queen) or infertile males (diploid males which serve no purpose).
The voila moment came once Huang estimated the bees' mating habits and the potential of CSD allele combinations. That's when he understood why he couldn't confirm the founder effect. Keeping the CSD mix diverse is one of the keys to maintaining a healthy hive, he said.
The island queens carry around 40 CSD alleles. Since they mate with nearly 100 males each also harboring around 40 alleles the high number of healthy genetic combinations keeps the gene pool diverse. By using natural selection to create healthy offspring, the bees perpetuate a healthy colony.
In comparison, if the island bees adopted the breeding habits of fire ants, with queens mating with a single male, inbreeding could wreck the off-shore claves or distinct populations of bees. The devastating change would reduce the fitness of the hive, decreasing the female workforce, as well as lowering the number of mating males.
What would be left would be an unhealthy hive with higher numbers of diploid or infertile males, with the same alleles, Huang said.
By extending his research beyond Hainan Island, Huang found evidence that showed that the island wasn't an isolated case.
"We failed to find any clustering of the bees' CSD alleles according to their geographical origin; the Hainan and mainland bees did not form separate clades," said Huang, whose research is supported by MSU AgBioResearch. "Previously published CSD sequences also failed to show any unique clade-forming in the Philippines and Malaysia."
###
[ | E-mail | Share ] ?
AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.
Public release date: 16-Apr-2012[ | E-mail |
Share ] Contact: Layne Cameron
layne.cameron@ur.msu.edu
517-353-8819
Michigan State University
EAST LANSING, Mich. By mating with nearly 100 males, queen bees on isolated islands avoid inbreeding and keep colonies healthy.
The results, published in the current issue of PLoS ONE, focused on giant honey bee colonies on Hainan Island, off the coast of China. Since these bees have long been separated from their continental cousins, it was thought that the island bees would be prime candidates for inbreeding as well as having very different genes, said Zachary Huang, Michigan State University entomologist.
"We believed that the island bees would show evidence of the founder effect, or random genetic changes in an isolated population, on a unique sex determination gene from the mainland bees," he said. "At first we were surprised when we couldn't document this effect. Looking at it further, I asked myself, 'Why didn't I think of this before?'"
When compared to bees, humans have a rather simplistic sex-determination process. In females, the two sex-determination chromosomes are the same, and in males the two chromosomes are different. With bees, however, the combinations of complementary sex determination genes, or CSDs, determine the sex and the societal role of the bees.
One particular gene can have alleles the "flavor" of genes. In humans, they dictate hair and eye color. In bees, though, they are responsible for creating females (worker bees), fertile males (that mate with the queen) or infertile males (diploid males which serve no purpose).
The voila moment came once Huang estimated the bees' mating habits and the potential of CSD allele combinations. That's when he understood why he couldn't confirm the founder effect. Keeping the CSD mix diverse is one of the keys to maintaining a healthy hive, he said.
The island queens carry around 40 CSD alleles. Since they mate with nearly 100 males each also harboring around 40 alleles the high number of healthy genetic combinations keeps the gene pool diverse. By using natural selection to create healthy offspring, the bees perpetuate a healthy colony.
In comparison, if the island bees adopted the breeding habits of fire ants, with queens mating with a single male, inbreeding could wreck the off-shore claves or distinct populations of bees. The devastating change would reduce the fitness of the hive, decreasing the female workforce, as well as lowering the number of mating males.
What would be left would be an unhealthy hive with higher numbers of diploid or infertile males, with the same alleles, Huang said.
By extending his research beyond Hainan Island, Huang found evidence that showed that the island wasn't an isolated case.
"We failed to find any clustering of the bees' CSD alleles according to their geographical origin; the Hainan and mainland bees did not form separate clades," said Huang, whose research is supported by MSU AgBioResearch. "Previously published CSD sequences also failed to show any unique clade-forming in the Philippines and Malaysia."
###
[ | E-mail | Share ] ?
AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert! system.
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