<P>Juan G. Roederer is professor of physics emeritus at the University of Alaska-Fairbanks, and adviser at the Abdus Salam International Centre for Theoretical Physics. 1952 DSc. University of Buenos Aires; 1966 professor of physics at that university; 1967-1977 professor at the University of Denver, Colorado; 1977-1986 director of the Geophysical Institute of the University of Alaska, then professor until 1993. Research fields: space physics, psychoacoustics, information theory and science policy; author of over 250 articles in scientific journals. His books "Mecanica Elemental" (Eudeba...