Word: metallicized
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Dates: during 1980-1989
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The million or so Americans who start orthodontic care each year can brace themselves to smile: the company that came up with Band-Aids has turned its attention to teeth. Johnson & Johnson's orthodontic division last week unveiled a new kind of bracket, the part of braces that affixes to...
But in the past year and a half physicists have stumbled on an unusual class of ceramic compounds that change everything. They too must be cooled to become superconductors, but only to a temperature of 98 K (-283 degrees F). And that suddenly brings superconductivity into the range of the...
That was the situation in 1983 when Karl Alex Muller, a physicist at the IBM Zurich Research Laboratory in Switzerland, decided to pursue an approach to superconductivity that had met with limited success in the past. Instead of using the kind of metallic alloys that held the existing record, he...
In many atoms, particularly those of metallic conductors, the outer shell has a number of empty slots, and the electrons that it does contain are not bound as tightly to it as those in the inner shells. Just as the sun's gravitational pull is weaker on distant Pluto than...
In West Germany, on the other hand, the new superconductors are of little interest to maglev engineers, who abandoned superconducting magnets in 1979. They opted to use conventional electromagnets instead. The German system is based on magnetic attraction, not repulsion. The magnets are on assemblies attached to the cars' undercarriages...