|
|
Noticias -
Noticias
|
|
Sexta, 15 Julho 2011 18:08 |
|
sciencehabit writes "It started with a single monkey coming down with pneumonia at the California National Primate Research Center in Davis. Within weeks, 19 monkeys were dead and three humans were sick. Now, a new report confirms that the Davis outbreak was the first known case of an adenovirus jumping from monkeys to humans. The upside: the virus may one day be harnessed as a tool for gene therapy." 
Read more of this story at Slashdot.
 ler mais: |
|
Noticias -
Noticias
|
|
Sexta, 15 Julho 2011 17:28 |
|
FleaPlus writes "Besides using the SpaceX Dragon capsule to deliver supplies to the ISS this year and astronauts in following years, the company wants to use Dragon as a platform for propulsively landing science payloads on Mars and other planets. Combined with their upcoming Falcon Heavy rocket, 'a single Dragon mission could land with more payload than has been delivered to Mars cumulatively in history.' According to CEO Elon Musk, SpaceX is working with NASA's Ames Research Center on a mission design concept that could launch in as early as 5-6 years."
Read more of this story at Slashdot.
 ler mais: |
|
Noticias -
Noticias
|
|
Sexta, 15 Julho 2011 16:49 |
|
Z34107 tips an article at Ars about the history of ethernet, from its humble beginnings at Xerox PARC in the mid-'70s, to its standardization and broad adoption, to the never-ending quest for higher throughput. Quoting:
"It's hard to believe now, but in the early 1980s, 10Mbps Ethernet was very fast. Think about it: is there any other 30-year-old technology still present in current computers? 300 baud modems? 500 ns memory? Daisy wheel printers? But even today, 10Mbps is not an entirely unusable speed, and it's still part of the 10/100/1000Mbps Ethernet interfaces in our computers. Still, by the early 1990s, Ethernet didn't feel as fast as it did a decade earlier. Consider the VAX-11/780, a machine released in 1977 by Digital Equipment Corporation. The 780 comes with some 2MB RAM and runs at 5MHz. Its speed is almost exactly one MIPS and it executes 1757 dhrystones per second. (Dhrystone is a CPU benchmark developed in 1984; the name is a play on the even older Whetstone benchmark.) A current Intel i7 machine may run at 3GHz and have 3GB RAM, executing nearly 17 million dhrystones per second. If network speeds had increased as fast as processor speeds, the i7 would today at least have a 10Gbps network interface, and perhaps a 100Gbps one."
Read more of this story at Slashdot.
 ler mais: |
|
|
Noticias -
Noticias
|
|
Sexta, 15 Julho 2011 16:07 |
|
crookedvulture writes "We've all encountered fanboys. They lurk on messageboards and in comment threads, ready to trumpet the benefits of their product or brand of choice with Cheeto-stained fingertips. And it's not their fault. This analysis of the scientific research on the subject reveals that our brains unconsciously develop an affinity for products we choose over similarly attractive alternatives. Duh, right? But what's really interesting is that this affinity exists not just among adults, but also children, monkeys, and even amnesic subjects with no memory of their original choices. We're all hard-wired to be fanboys, it seems. Some of us just do a better job of overcoming our subconscious tendencies."
Read more of this story at Slashdot.
 ler mais: |
|
|
|
|
|
|
JPAGE_CURRENT_OF_TOTAL |
