Get flash to fully experience Pearltrees
There’s a fundamental flaw with fan-and-heatsink cooling systems: no matter how hard the fan blows, a boundary layer of motionless, highly-insulating air remains on the heatsink.
Russian scientists have developed a device that can analyze the composition of a substance through its container.
Lilliputian Systems is getting closer to introducing a portable butane-powered charger for small electronics. The Wilmington, Mass.
Hal Hodson, technology reporter (Image: Sipa Press/Rex Features)
A light-emitting diode (LED) that emits more light energy than it consumes in electrical energy has been unveiled by researchers in the US. The device – which has a conventional efficiency of greater than 200% – behaves as a kind of optical heat pump that converts lattice vibrations into infrared photons, cooling its surroundings in the process. The possibility of such a device was first predicted in 1957, but a practical version had proved impossible to create until now.
17 February 2011 Last updated at 13:58 ET Traditional lasers rely on gain mediums to produce beams of coherent light
London: Scientists have claimed that they can build some of the basic components for digital devices out of bacteria and DNA, suggesting a new generation of biological computing devices. The researchers, from Imperial College London, have demonstrated that they can build logic gates, which are used for processing information in devices such as computers and microprocessors, out of harmless gut bacteria and DNA.
Back in June we first learned about Nokero and its desire to bring solar powered light bulbs to developing nations . The company’s first model, the N100, looks to have done well enough – 50,000 produced thus far – that Nokero is now coming out with an improved model it calls the N200.
For teaching a course I needed to take a closer look at a CPU.