PROGRESS: Scientists Made Lightning-Fast Graphene CPUs
Aug 22, 2013 12:56
Graphene. The magic material that has the power to make faster / fastest transistors ever. Scientists haven't figure that part out yet, but they've nonetheless taken a step to making graphene transistors work for real.
They aren't just fast. As an example, the speediest one to date clocks in 427GHz. The problem with them though is that they aren't good at turning off. In fact, they don't at all.
Guangxiong Liu and a team of researchers from University of California have come up with a practical solution for that. MIT's Technology Review explains:
[Liu and the team] rely on a different phenomenon called negative resistance to create transistor-like behaviour.
Negative resistance is the counterintuitive phenomenon in which a current entering a material causes the voltage across it to drop. Various groups, including this one at Riverside, have shown that graphene demonstrates negative resistance in certain circumstances.
Their idea is to take a standard graphene field-effect transistor and find the circumstances in which it demonstrates negative resistance (or negative differential resistance, as they call it). They then use the dip in voltage, like a kind of switch, to perform logic.
Still, real applications of graphene are still a long way from now and there's a lot of testing that needs to be done. Nevertheless, progress right? [MIT Technology Review]
Cryptocurrencies have opened up a whole new world of opportunities in the financial markets. They have been touted as the currency of the future. This new form of currency has already permeated the market, and many smart traders are making a pretty penny off the different types of cryptocurrencies. As you are aware, traders who invested in Bitcoin back in 2009 got ROIs thousands of times their initial investments. You, too, should consider taking advantage of the cryptocurrency craze. Read more
Color photographs appeared in the middle of the XIX century but were available only to a very narrow privileged circle of people. Therefore, it is normal if the family stores black and white photographs of relatives of those years. Many even like to review them again and again as old cards can awaken special feelings and memories, transfer through time. Read more
Search Engine Optimization or SEO is the process of optimizing websites in order to achieve better results and higher ranks in search engine results. Search engines like Google, Yahoo and Bing depend on certain algorithms that help rank websites according to the way they have been optimized for readers and viewers. Read more