To: Ed Devlin who wrote (853 ) 6/6/1999 1:58:00 PM From: Chuca Marsh Read Replies (2) | Respond to of 1364
Ed, rerad these links, compare the rhombic.com news we have something here- no resistance and ( OK less resistance-is it futile) and a matrix of diamond nano pathways ( ring a bell)? RE:uq.oz.au webcom.com Model 1000: Resistance and Persistent Current in a Model 1000: Resistance and Persistent Current in a Ring. Watch as the resistance of a superconductor drops suddenly to zero at its critical temperature. Use the unique ring-shaped superconductor to store a current that could literally last for trillions of years, and explore other properties of superconductors. This kit reinforces the basics of electromagnetism, and demonstrates the vast potential of superconductors in applications such as electrical energy storage, levitating trains and medical imaging. A convenient probe holds the ring-shaped superconductor on a brass disk with an imbedded temperature sensor and a four-point resistance measurement hookup. Also included are electronics for converting temperature and resistance signals for measurement with an ordinary voltmeter, rare-earth magnet with holder, compass, liquid nitrogen cup and manual. Temperature readout can be calibrated to read in °K or °C. Price: $195.00 superconductorweek.com " A Brief History of Superconductors The first discovery of a superconductive material took place in 1911 when a Dutch scientist named Heike Kammerlingh Onnes cooled mercury down to -269° C. Practical difficulties involved with refrigeration meant that this phenomenon was of mostly theoretical interest until 1986, when new materials were discovered that became superconductive at -173° C. While this may still seem incredibly cold, it is far easier to reach these temperatures in an industrial setting. The discovery of these "High Temperature Superconductors" has created vast interest and an entire industry dedicated to the research and commercial development of these materials and their applications. International competition is strong in these materials, and current efforts involve many facets of the electronics, power, medical technology, transportation, and materials processing industries.. " Chucka