Word: cabrera
(lookup in dictionary)
(lookup stats)
Dates: during 1980-1989
Sort By: most recent first
(reverse)
...dramatize his appeal to the poor, Jackson has taken to sleeping some nights in their homes rather than in hotels. Last Monday he stayed with William Jarrard, an unemployed white Baltimorean who bears an ironic resemblance to Archie Bunker; Wednesday in the San Antonio home of Hortencia Cabrera, mother of 14. To call attention to industrial pollution, Jackson on Wednesday also visited the West Dallas housing project apartment of Sarah Dean, whose five-year-old daughter Africia suffers from lead poisoning believed to be caused by a nearby smelter...
...detect a fugitive monopole, Cabrera used a kind of magnetic mousetrap, which was connected to a SQUID (superconducting quantum interference device). He turned a coil of niobium, a platinum-gray metallic element, into a superconductor of electricity by cooling it to within nine degrees of absolute zero (minus 460° F). Current thus moved through it without resistance, allowing the slightest twitch in the current's flow to be recorded. At 1:53 p.m. on Feb. 14, the magnetic flux in Cabrera's device jumped eight steps, exactly what was expected if a Dirac monopole passed through. Cabrera...
...particle detector recorded 75 hits, one much different from the rest. When Price published a paper claiming to have found a monopole "candidate," the scientific community's excitement soon gave way to skepticism. In the end, Price admitted he had been a bit hasty. Says Price of Cabrera: "His technique is extremely sophisticated. It looks just like a monopole going through the loop...
Nevertheless, some theoretical chinks remain. According to "Parker's Limit," a theory developed by University of Chicago Astrophysicist Eugene Parker, monopoles would draw energy from nearby magnetic fields as they traveled through the galaxy. Cabrera's one event in only 185 days is a very high rate of detection. It suggests that there are many more monopoles zipping around than our galaxy's magnetic field can properly support...
...Cabrera and others are now rushing to build larger devices in the hope of expanding his approach. Armed with a three-coil device, Cabrera expects to record as many as 100 events in a year. Says Harvard Physicist Sheldon Glashow: "If Cabrera is right, this will be one of the most important physics discoveries in this century. It's been a long quest...