Diamond is a sign of Love and status. Its a precious metal item which has get a much important in world and also in our lives. Most of the wedding ceremonies are incomplete in the absense of diamond. In wedding ceremonies diamond plays an important role as well as in our real lives and in our daily routine it is used to show our expression and also our love to our loved one.
Diamond is an electrical insulator well known for its exceptional hardness. It also conducts heat even more effectively than copper, and can withstand very high electric fields. With these physical properties, diamond is attractive for electronic applications, particularly when charge carriers are introduced (by chemical doping) into the system. Boron has one less electron than carbon and, because of its small atomic radius, boron is relatively easily incorporated into diamond;
as boron acts as a charge acceptor, the resulting diamond is effectively hole-doped. Here we report the discovery of superconductivity in boron-doped diamond synthesized at high pressure (nearly 100,000 atmospheres) and temperature (2,500–2,800 K).
Electrical resistivity, magnetic susceptibility, specific heat and field-dependent resistance measurements show that boron-doped diamond is a bulk, type-II superconductor below the superconducting transition temperature Tc 4 K; superconductivity survives in a magnetic field up to Hc2(0) 3.5 T. The discovery of superconductivity in diamond-structured carbon suggests that Si and Ge, which also form in the diamond structure, may similarly exhibit superconductivity under the appropriate conditions.
CB
CB2
Monday, June 9, 2008
Superconductivity in diamond
Posted by M.SHOAIB ASIF at 9:52 PM
Labels: DIAMONDS AND NEW FASHIONS
Daily Mail Anne Diamond article 'Unbelievable'
Dr. Tanya Byron has criticised the mainstream press reaction to The Byron Report and video games in general, claiming that the press "has the mindset 'all games bad' or 'games industry equals bad'".
"I'm very clear that the games industry makes adult games for adults; it doesn't make adult games for children," Bryon commented. "Some people still don't understand that the word 'game' doesn't necessarily mean anything is right for kids."
Bryon also addressed the issue of how the public information campaign to educate parents would be funded. In a press conference last week, MP Andy Burnham said it was "principally up to the industry" to fund it.
"In consultations I've had, [the industry was] saying 'we will be prepared to fund the public information campaign'," said Byron. "This seems like a really good opportunity for the industry to position itself much more positively in the social mindset.
"I'm not saying I expect the industry to fund it. But that has to be worked out. Everyone has to be grown up about it, and ask what we're really trying to achieve."
Posted by M.SHOAIB ASIF at 9:48 PM
Labels: DIAMONDS AND NEW FASHIONS
Daily Mail Anne Diamond article 'Unbelievable'
Dr. Tanya Byron has criticised the mainstream press reaction to The Byron Report and video games in general, claiming that the press "has the mindset 'all games bad' or 'games industry equals bad'".
"I'm very clear that the games industry makes adult games for adults; it doesn't make adult games for children," Bryon commented. "Some people still don't understand that the word 'game' doesn't necessarily mean anything is right for kids."
Bryon also addressed the issue of how the public information campaign to educate parents would be funded. In a press conference last week, MP Andy Burnham said it was "principally up to the industry" to fund it.
"In consultations I've had, [the industry was] saying 'we will be prepared to fund the public information campaign'," said Byron. "This seems like a really good opportunity for the industry to position itself much more positively in the social mindset.
"I'm not saying I expect the industry to fund it. But that has to be worked out. Everyone has to be grown up about it, and ask what we're really trying to achieve."
Posted by M.SHOAIB ASIF at 9:48 PM
Labels: DIAMONDS AND NEW FASHIONS