20080629
20080624
This is what i call dancing!
20080622
20080619
dub lew tea eff!!
Datuk Seri Dr Chua contributed too lmao
I'm looking forward to visiting those horny hangouts that i didnt know about;)
Associate Professor Roger Reeves...
Professor Reeves has been successfully looking at the properties of indium nitride and zinc-oxide that have the potential to significantly improve the efficiency of optoelectronic devices.
“Silicon solar cells are used to convert sunlight into electricity but can only achieve a maximum efficiency of around 35 per cent because they treat all wavelengths of sunlight equally – the high energy blue sunlight is treated the same as the lower energy red light. By being cleverer about the way the solar cell is constructed it becomes possible to get close to 100 per cent efficiency – but that requires the development of new semiconductor materials.”
“To see why this may be important we only need to look at the transformation of traffic lights. Five years ago a green traffic light consisted of a white light behind a green piece of glass. Most of the energy of the lamp was lost. Today we see traffic lights made of an array of green or yellow or red light-emitting diodes (LEDs). These LEDs are designed to emit light of only the colour wanted and thus there is very little energy wasted.”
http://www.comsdev.canterbury.ac.nz/news/2007/071109a.shtml
...and Dr David Wiltshire
“The first models were based on a very simple approximation where the universe is uniformly smooth and featureless, evolving the same way in all directions. Looking at the huge numbers of observations such as supernovae distances, cosmic microwave background radiation fluctuations and galaxy clustering statistics, and thinking about the many anomalies standard dark energy does not solve, I thought we had to be much more careful in the way we interpret the observations,” Dr Wiltshire said.
He said that the present universe was very lumpy and that galaxies were not uniformly distributed with huge voids hundreds of millions of light-years across.
Long before galaxies formed, matter was smoothly distributed and clock rates were the same everywhere. Now that it was “lumpy”, it was necessary to account for where the observer was when calibrating cosmic clocks.
A common analogy is that space curves around a massive object - just as a rubber sheet on a trampoline will stretch around a heavy cannon ball - and time slows down there.
“The flat edge of the rubber sheet is the reference point for our clocks. It is only the space beyond this flat edge that is expanding. Clock rates and the curvature of space can both vary gradually as you move across an expanding void.”
And, since mass slows down time, the clocks of observers in voids, where most of the empty space in the universe is, will appear to be ticking faster than the clocks of observers in galaxies.
It was this last feature, he said, that explained why dark energy was unnecessary.http://www.comsdev.canterbury.ac.nz/news/2008/080125c.shtml
20080618
How do u Like my new no. 565?
20080616
喜欢. gusta. ような. suka. aimez. piace. 좋아한다. mag. люблю.