Whatever Happened to Josephson-Junction Computers

Article Abstract:

Many people believed that Josephson-junction devices would allow computers to become faster, use less power, and have higher packaging densities. Realizing the technology in practical applications was found to be too difficult, and IBM recently stopped its research and development program in the field. Japan's Ministry of International Trade and Industry still feels that Josephson-junction devices could be used for high-speed supercomputers. A diagram illustrates a Josephson junction, and a graph shows the operating characteristics.

Industrial research, Technology, Supercomputers, Supercomputer, Josephson junctions, Research and Development, Josephson Junction

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Whatever Happened to Aluminum House Wiring?

Article Abstract:

Between 1967 and 1975, there was growing awareness that aluminum wiring and copper electrical fixtures were possibly hazardous combinations. The problems resulted from the thermal expansion and cold-flow characteristics of aluminum wire compared to the copper terminals. The problems were solved, but some people feel that there is a tendency to blame fires of unclear origin on electrical problems.

Fires, Safety, Contractor, Conductors

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