Tsuneo Nakahara

Development of Superconducting Materials and Impacts on the Social Economy

This report deals with the recent development of high Tc superconductors and the problens that renain. Thin fill and wiring technologies are reviewed as the key technologies for practical application. In addition, iipacts on the social econoiy are discussed.

Optical Communication Systems in Japan

A quarter of a century has elapsed since the emergence of ruby laser invented by Maiman in 1960, the optics industry achieved a marked evolvement to support the basis of the in-formation society, and served as a member of the hightech industry constituting the kernel of industrial structure.