Saturday, August 29, 2009

Edward M Kennedy



Health Care Reform for every American was what Kennedy called the cause of his life

Saturday, December 20, 2008

Sunday, November 30, 2008

A new approach to the polymeric semiconductor

As pi conjugated material PF (Polyfluorene) has shown strikingly new features of optoelectronic process which has drawn more attention in the industrial production for white light emitting polymer diode(PLED). It has shown emission of light in the entire visible spectrum. Their main advantages are suitable electrochemical stability. By appropriate chemical modification it is possible to tune up this material according to the application. Besides, for their excellent HOMO- LUMUO energy level polyfluorene posses efficient charge transport process. But still there are some problems with their imposed quantum efficiency, unbalanced mobilities of electron and holes, unwanted green emission and another main problem of fluorine based semiconductor is electrical degradation which frequently occurred in these material resulting low emission band. One of the taken approaches for mitigation of these problems is introduction of either electron donor or electron acceptor co-polymer into the main polymer backbone as side chain or end cap.

Wednesday, November 5, 2008

America looking to future




Barack Obama's speech on the Democratic National Convention 2008

Friday, October 31, 2008

Teen motherhood: need caution than to regret later (in Bangla)

In this movie the United States presidential candidate Barack Obama has revealed his promises once again in front of the people of America. What I would like to appreciate about him is that he was advocating people's participation in the governing process. He agrees to listen to people even if he does not always concede to others opinion. To make things better and manoeuvre his leadership to build up an American nation he is talking about change in the future politics. The existing obnoxious politics should come to an end. Wars should be ended. And the 10 to 12 billion dollars that the government is spending on wars every month could be used to build schools and to spend in health care and job creation under renewable clean energy sector. Barack was talking about biogas, clean coal, and solar energy as future fuel for America.