28 Nov '11, 10pm

A Supercondcuting Surge Protector for the Gird:

Nearly a quarter of a century ago a new class of superconductors--the so-called high-temperature superconductors--was announced to great fanfare at a New York City physics meeting. The new superonductors lost all electrical resistance at temperatures obtainable with liquid hydrogen or liquid nitrogen; before long, scientists predicted, more tinkering would yield materials that superonducted at room temperatures. And soon too, the evolving new materials would find wide applications in power systems, as transmission cable and in transformers, turbines, and motors. As it happens, two decades later we have remarkably little to show for all that. Room-temperature superconducting materials have not been discovered or invented, and power applications have been few and far between. A few lengths of superconducting cable have been placed in service in operating systems, with a numb...

Full article: http://spectrum.ieee.org/energywise/energy/the-smarter-gr...

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A Superconducting Surge Protector for the Grid

spectrum.ieee.org 28 Nov '11, 11pm

Nearly a quarter of a century ago a new class of superconductors--the so-called high-temperature superconductors--was anno...

これ、写真でわかりにくいですけど、袋になっているんですよね(^^;; sparkfunのこの製...

sparkfun.com 27 Nov '11, 11pm

Description: It's always a good idea to have a pen on hand. However, putting a pen in your pocket without protection can b...