The whole point of Facebook is to keep up with your friends, right? You might think that adding friends means having more fun, but a small Scottish study says it's adding to our stress.
A report by the University of Edinburgh Business School has found that increasing friends -- specifically different groups of friends -- increases the potential for stress.
We experimentally demonstrate a class of tractor beams created by coherently superposing coaxial Bessel beams. These optical conveyors have periodic intensity variations along their axes that act as highly effective optical traps for micrometer-scale objects. Varying the Bessel beams' relative phase shifts the traps axially thereby selectively transports trapped objects either downstream or upstream along the length of the beam.
It seems like something is very wrong with the picture when you read the news and it sounds more like a science fiction novel than a newsflash. For example, Barnaby Jack showed how an attacker with a laptop, located up to 50 feet from a victim, could remotely hack a pacemaker and deliver an 830-volt shock.
The world is turning to YouTube to watch Felix Baumgartner's daring stratospheric skydive this morning.
At last count, the video-sharing site's live stream of the high-altitude jump had attracted more than 7.2 million viewers. They are currently watching the last stages of egress before Baumgartner jumps from approximately 128,000 feet.
Baumgartner is attempting to set four records: the fastest freefall (an unprecedented Mach 1), the longest sustained freefall, a free fall from the highest-ever starting point, and the highest ascent in a manned balloon.
It's been the FBI's dream for years -- to do near-instant DNA analysis using mobile equipment in the field -- and now "Rapid DNA" gear is finally here.
The idea is that you simply drop into the system a cotton swab with a person's saliva, for example, and the "Rapid DNA" machine spits out the type of DNA data that's needed to pin down identity. Now that such equipment exists, the FBI is pushing to get it into the hands of law enforcement agencies as soon as possible.