It appears that the skin, the largest organ in our body, is a kind of zoo and some of the inhabitants are quite novel, according to a new study. Researchers found evidence for 182 species of bacteria in skin samples. Eight percent were unknown species that had never before been described.
It is the first study to identify the composition of bacterial populations on the skin using a powerful molecular method. Not only were the bacteria more diverse than previously estimated, but some of them had not been found before, says Martin J. Blaser, M.D., Frederick King Professor and Chair of the Department of Medicine and Professor of Microbiology at NYU School of Medicine, one of the authors of the study.
Science & Technology
Humans learn how to deliberately and carefully reach for things while still in the womb, says an Italian team of scientists.
While it is generally believed babies only show planned reaching behaviour at 3 or 4 months old, the researchers think they may start before they are born.
Psychologist Dr Stefania Zoia of the Institute of Child Health IRCCS Burlo Garofolo in Trieste presented her team's research at the 8th Motor Control and Human Skill Conference in Australia last week.
While it is generally believed babies only show planned reaching behaviour at 3 or 4 months old, the researchers think they may start before they are born.
Psychologist Dr Stefania Zoia of the Institute of Child Health IRCCS Burlo Garofolo in Trieste presented her team's research at the 8th Motor Control and Human Skill Conference in Australia last week.
Researchers in Cuba are using an infrared sensor to study the collective behaviour of ants and hope to apply their findings to engineering problems.
Using simple optical components to quantify the behaviour of ants could help scientists tackle problems such as traffic management say researchers at the University of Havana in Cuba. (Review of Scientific Instruments 77 126102)
"Ants show a highly nonlinear, collective behaviour that somehow produces an overall intelligence out of individual simplicity," Ernesto Altshuler from Havana's Complex Systems and Superconductivity Laboratory told optics.org. "We want to quantify and understand the process of self organization that produces this overall intelligence. Many authors believe that ant behaviour may teach us robust algorithms to be used in engineering."
Altshuler and colleagues use an infrared LED, a mirror and a phototransistor. Both the LED and the phototransistor have a peak emission/sensitivity around 850 nm.
Using simple optical components to quantify the behaviour of ants could help scientists tackle problems such as traffic management say researchers at the University of Havana in Cuba. (Review of Scientific Instruments 77 126102)
"Ants show a highly nonlinear, collective behaviour that somehow produces an overall intelligence out of individual simplicity," Ernesto Altshuler from Havana's Complex Systems and Superconductivity Laboratory told optics.org. "We want to quantify and understand the process of self organization that produces this overall intelligence. Many authors believe that ant behaviour may teach us robust algorithms to be used in engineering."
Altshuler and colleagues use an infrared LED, a mirror and a phototransistor. Both the LED and the phototransistor have a peak emission/sensitivity around 850 nm.
A material that is stiffer than diamond has been created by mixing particles of the mineral barium titanate and molten tin. Diamond was previously the stiffest material known.
The new material was made by a team from Washington State University and Wisconsin-Madison University, both in the US, and from Ruhr-University Bochum in Germany.
They mixed molten tin, heated to about 300ºC, with pieces of a ceramic material called barium titanium - often used as an insulator in electronic components. The particles were each about one-tenth of a millimetre in diameter and were dispersed evenly through the tin using an ultrasonic probe.
Once ingots of the new composite had cooled, rectangular or cylindrical samples 3 centimetres long and 2 millimetres across were tested for stiffness. The response of the samples to bending was tested by gluing one end to a strong support rod and the other to a magnet with a small mirror attached.
The new material was made by a team from Washington State University and Wisconsin-Madison University, both in the US, and from Ruhr-University Bochum in Germany.
They mixed molten tin, heated to about 300ºC, with pieces of a ceramic material called barium titanium - often used as an insulator in electronic components. The particles were each about one-tenth of a millimetre in diameter and were dispersed evenly through the tin using an ultrasonic probe.
Once ingots of the new composite had cooled, rectangular or cylindrical samples 3 centimetres long and 2 millimetres across were tested for stiffness. The response of the samples to bending was tested by gluing one end to a strong support rod and the other to a magnet with a small mirror attached.
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| ©Andrew J. Hanson, Indiana University |
| A computer-generated rendering of a possible six-dimensional geometry similar to those studied by UW-Madison physicist Gary Shiu. |
© The Telegraph, UK
Rome to China map, Roman descendants found in China?
Rome to China map, Roman descendants found in China?
Scientists have taken blood samples from 93 people living in and around Liqian, a settlement in north-western China on the fringes of the Gobi desert, more than 200 miles from the nearest city.
They are seeking an explanation for the unusual number of local people with western characteristics - green eyes, big noses, and even blonde hair - mixed with traditional Chinese features.
"I really think we are descended from the Romans," said Song Guorong, 48, who with his wavy hair, six-foot frame and strikingly long, hooked nose stands out from his short, round-faced office colleagues.
"There are the residents with these special features, and then there are also historical records about the existence of these people long ago," he said.
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| ©Hindustan Times |
| Stupendous discovery: Mangal Panchayatan Parishad members with the fossilised eggs. |
A new option in Internet service -- fiber-optic broadband -- is making cable look about as antiquated as dial-up. Called FiOS, the service is much faster and, perhaps more important, offers consumers more choice in a not-so-competitive marketplace.
According to an article in the February 2007 issue of Consumer Reports Magazine, fiber-optic broadband outperforms cable, DSL, satellite broadband and dial-up in speed, reliability and tech support. But the most notable difference is in speed.
According to an article in the February 2007 issue of Consumer Reports Magazine, fiber-optic broadband outperforms cable, DSL, satellite broadband and dial-up in speed, reliability and tech support. But the most notable difference is in speed.
The cyclic model proposed by Dr. Paul Frampton, Louis J. Rubin Jr. distinguished professor of physics in UNC's College of Arts & Sciences, and co-author Lauris Baum, a UNC graduate student in physics, has four key parts: expansion, turnaround, contraction and bounce.
During expansion, dark energy -- the unknown force causing the universe to expand at an accelerating rate -- pushes and pushes until all matter fragments into patches so far apart that nothing can bridge the gaps. Everything from black holes to atoms disintegrates. This point, just a fraction of a second before the end of time, is the turnaround.
During expansion, dark energy -- the unknown force causing the universe to expand at an accelerating rate -- pushes and pushes until all matter fragments into patches so far apart that nothing can bridge the gaps. Everything from black holes to atoms disintegrates. This point, just a fraction of a second before the end of time, is the turnaround.
Windows Vista is out. And by now, almost everyone knows three things about Microsoft's first major operating system release in five years: it has enhanced security features, a snazzy interface, and better search capabilities.
But there's more to Vista than these three features - and the new is not all good. While some of Vista's secrets are bound to surprise you pleasantly, others could make you question your decision to upgrade altogether.
But there's more to Vista than these three features - and the new is not all good. While some of Vista's secrets are bound to surprise you pleasantly, others could make you question your decision to upgrade altogether.
Comment: So, what else is new?