Sunday, May 3, 2009

MS Windows 7

MS Windows 7, the next major release of the world's most popular operating system, goes public in trial form in the next week. A test version of Windows 7 will be available to developers from Thursday, while the public can try it out from 5 May.
Microsoft is hoping it can avoid the negative press that surrounded the launch of Vista, the last major Windows release, almost three years ago.
Windows 7 has been designed to be compatible with Vista so users do not have to invest in new hardware.
A commercial release of Windows 7 is expected in the next nine months.
Microsoft is hoping it can avoid the negative press that surrounded the launch of Vista, the last major Windows release, almost three years ago.
Windows 7 has been designed to be compatible with Vista so users do not have to invest in new hardware.
A commercial release of Windows 7 is expected in the next nine months.
Windows 7 promises a major usability improvement on Vista, and a simplification of security measures which caused frustration for many users.
Windows 7 would build on the security improvements in Vista, which have seen a fall in the number of malware attacks and critical vulnerabilities identified.
Windows 7 would build on the security improvements in Vista, which have seen a fall in the number of malware attacks and critical vulnerabilities identified.

Thursday, April 23, 2009

Rydberg Molecule--strange first

Back in 1934 Enrico Fermi predicted that if another atom were to "find" that lone, wandering electron, it might interact with it but he never imagined that molecules could be formed.
Recently Vera Bendkowsky and his team from the University of Stuttgart created such a molucle known as a Rydberg molecule; this is formed through an elusive and extremely weak chemical bond between two atoms.
The Rydberg molecules in question were formed from two atoms of rubidium - one a Rydberg atom, and one a "normal" atom.
The movement and position of electrons within an atom can be described as orbiting around a central nucleus - with each shell of orbiting electrons further from the centre.
A Rydberg atom is special because it has one electron alone in an outermost orbit - very far, in atomic terms, from its nucleus.
Unimaginably cold temperatures are needed to create the molecules.At temperatures very close to absolute zero - minus 273C - this "critical distance" of about 100nm (nanometres - 1nm = one millionth of a millimetre) between the atoms is reached.
When one is a Rydberg atom, the two atoms form a Rydberg molecule. This 100nm gap is vast compared to ordinary molecules
Pushing this electron out to its lonely periphery - and make a Rydberg atom - requires energy.
This ultracold experiment is also ultra-fast - the longest lived Rydberg molecule survives for just 18 microseconds.
But the fact that the molecules can be made and seen confirms long-held fundamental atomic theories.

Tuesday, October 28, 2008

New Artificial Heart

Dr Alain Carpentier's new artificial heart look very real expect for the colour and texture.The device is designed to be as similar as possible to the human heart

The device beats almost exactly like the real thing using electronic sensors to regulate heart rate and blood flow.
Developers Carmat now need approval from the French authorities before pushing ahead with clinical trials.
Several teams from around the world have been working to develop the perfect artificial heart that could be fitted into the 20,000 patients worldwide unable to receive a life-saving heart transplant because of a shortage of donor organs.
The new heart is covered with specially treated tissue to avoid rejection by the body's immune system and the formation of blood clots.
However, the power supply for the heart remains a significant hurdle.
Carmat, the company founded by Professor Carpentier and Europe's aerospace and defence giant EADS, says the battery could last for between five and 16 hours after which it would have to be recharged to prevent the artificial heart stopping.
Professor Carpentier's team is studying two options that do not require wires crossing the skin because these pose an infection risk. Professor Carpentier said the heart was necessary given the chronic shortage of heart donors and growing heart patient waiting lists.

Saturday, September 20, 2008

The Large Hadron Collider experiment has stoped

CERN announced on Thursday that it had shut down the collider a week ago after a successful start-up that had beams of protons circling in both clockwise and counterclockwise directions in the collider.
It was at first thought the failure of an electrical transformer that handles part of the cooling was the problem, CERN said. That transformer was replaced last weekend and the machine was lowered back to operating temperature to prepare for a resumption of operations.

But later it turned out to be a much serious problem. A faulty electrical connection between two magnets that stopped superconducting, melted and led to a mechanical failure and let the helium out and this will keep it out of commission for at least two months.

Tuesday, September 16, 2008

Say No to Bottled Water

That bottled water is not only hurting your pockets and the environment but also giving you diabetes and heart disease. An ubiquitous ingredient in plastics known as Bisphenol-A or BPA. BPA is the chemical once studied as a synthetic form of estrogen, but more recently known to leach out of some plastic water bottles and baby bottles, and that is found in all kinds of plastic products.
A resent JAMA (Journal of American Medical Association) study has found a connection between BPA and diabetes and heart disease in adults. Scientists reviewed the health of 1,455 American adults and found that people with higher concentrations of BPA in their urine were slightly more likely to have heart disease and diabetes.
This study was one of the largest BPA studies done in humans; it could only provide convincing circumstantial evidence that, where high levels of BPA lurked, so do diabetes and poor heart health. The study's authors wrote that their work could not definitively prove that BPA had a part in causing the diseases.
For some scientists, that's not enough to convince them that governments should begin regulating BPA in products.

Wednesday, September 10, 2008

The Large Hadron Collider experiment is on

The first - clockwise - proton beam completed its first circuit of the underground tunnel at just before 0930 GMT. The second - anti-clockwise - proton beam successfully circled the ring after 1400 GMT. The beams have not yet been run continuously. So far, they have been stopped, or "dumped", after just a few circuits.Cern has not yet announced when it plans to carry out the first collisions, but some low-energy collisions could happen in the next few days. This will allow engineers to calibrate instruments, but will not produce data of scientific interest.
The vast circular tunnel - the "ring" - which runs under the French-Swiss border contains more than 1,000 cylindrical magnets arranged end-to-end.
The magnets are there to steer the proton beam around this 27km-long ring.
In order to get both beams to circulate continuously around the LHC, engineers have to "close the orbit". The beams themselves are made up of several "packets" - each about a metre long - containing billions of protons.
The protons would disperse if left to their own devices, so engineers use electrical forces to "grab" them, keeping the particles tightly huddled in packets.
Once the beams are captured, the same system of electrical forces is used to give the particles an energetic kick, accelerating them to greater and greater speeds.
At allotted points around the tunnel, the beams will cross paths, smashing together near four massive "detectors" that monitor the collisions for interesting events.
LHC DETECTORS
ATLAS - one of two so-called general purpose detectors. Atlas will be used to look for signs of new physics, including the origins of mass and extra dimensions
CMS - the second general purpose detector will, like ATLAS, hunt for the Higgs boson and look for clues to the nature of dark matter
ALICE - will study a "liquid" form of matter called quark-gluon plasma that existed shortly after the Big Bang
LHCb - Equal amounts of matter and anti-matter were created in the Big Bang. LHCb will try to investigate what happened to the "missing" anti-matter

Tuesday, September 9, 2008

End of the world or unveiling the mysteries of universe

Tomorrow the Large Hadron Collider is set to be fired up and everybody is wondering will it bring about the end of the world or provide the answers to the beginning of the universe .
Built by the European Organization for Nuclear Research -- known by its French acronym CERN ,the Large Hadron Collider (LHC) buried deep underground along the border of Geneva and France is expected to reveal the secrets of Universe. The collider fires particles into accelerator until they almost acquire the speed of light. They gain enormous amount of energy as 2 beams of light travel in opposite directions, circling the structure 11,000 times per second.
Scientists hope to put under the scanner the existing laws of physics describing the fundamental nature of matter.
Giant detectors are placed inside huge caverns to record data. With 600 million collisions taking place per second, there is huge amount of data generated, which will be recorded in special computing system called the Grid.
Some of the scientists working on the experiment have received threatening emails and been besieged by telephone calls from worried members of the public who fear the machine could cause earthquakes and destroy the world.


The Large Hadron Collider, buried beneath the ground near Geneva, Switzerland, is 27 kilometers in circumfrance. Particles will be accelerated to 99.9999991 percent of the speed of light.

Even if scientists say they are confident that switching on the LHC won't bring the world to a sudden end, some of them are hoping to find evidence of dimensions in excess of the four we are currently aware of. Because the LHC is the most powerful and most precise particle accelerator ever built, many see it as the best opportunity yet to find proof for the veracity of "string theory."
String theory is a mathematical construct that many believe might explain away inconsistencies between Albert Einstein's General Theory of Relativity and quantum mechanics -- a major focus in theoretical physics for much of the last century. The highly complex models used in string theory point to the possible existence of up to 11 dimensions and also make predictions about the existence of some as-yet unobserved sub-atomic particles. Should the LHC be able to find some of those particles, a much touted theory of physics would have its first kernel of proof.
But string theory is just one idea being investigated by the thousands of scientists from more than 80 countries who will be running, analyzing and evaluating the experiments at the Large Hadron Collider. Many also hope to find the elusive "Higgs boson," a theoretical particle named after the Scottish physicist Peter Higgs. He came up with a theory in 1964 to help explain what gives mass to matter, thus making the universe possible. Higgs pointed to a particle that has so far never been observed. By creating conditions similar to those that existed at the birth of our universe, the so-called "Big Bang," scientists hope to be able to find Higgs boson, also known as the "God Particle."

Others will be looking for all manner of sub-atomic particles and anti-particles, the origins of dark energy and the make-up of dark matter.
Almost just as interesting, though, is the massive computer network CERN has set up to evaluate the prodigious quantities of data the LHC will produce. Called the LHC Grid, the network will encompass some 60,000 computers around the world in order to leverage enough computer power to go through the 15 petabytes of information LHC experiments will produce each year.

Friday, September 5, 2008

Rap Performance — about high-energy particle physics

Kate McAlpine the 23-year-old Michigan State University graduate and science writer raps about the Large Hadron Collider, the groundbreaking particle accelerator that has been built in a 17-mile circular tunnel at the CERN laboratory near Geneva, Switzerland.
A must see on the YouTube.

Click the link below

http://www.youtube.com/watch?v=j50ZssEojtM

McAlpine honed her physics rapping skills at Michigan State's National Superconducting Cyclotron Laboratory, where she was part of a student research program two years ago.

Sunday, August 17, 2008

What is on your mind?

The US military is paying scientists to study ways to read people's thoughts. The research could someday lead to a gadget capable of translating the thoughts of soldiers who suffered brain injuries in combat or even stroke patients in hospitals.
Armed with a $ 4-million grant from the army, scientists are studying brain signals to try to decipher what a person is thinking and to whom the person wants to direct the message.
The project is a collaboration among the researchers at the University of California, Irvine; Carnegie Mellon University; and the University of Maryland. The scientists use brain wave-reading technology known as electroencephalography, which measures the brain's electrical activity through electrodes placed on the scalp.
It works like this: volunteers wear an electrode cap and are asked to think of a word chosen by the researchers, who then analyse the brain activity. In the future, scientists hope to develop thought-recognition software that would allow a computer to speak or type out a person's thought.