This is the continuation of the general seminars of the Applied Physics Scientific Section, an excellent opportunity to meet other members of this Scientific Section. Refreshments will be served at the end of the seminar. You will be especially welcome if you are visiting the Centre, or other Trieste Institutes, as Associate Members, TRIL Fellows, or if you are from Affiliated Institutes in the various areas of Applied Physics. The summary of the seminar can be consulted at: http://www.ictp.it/~chelaf/ss84.html Refreshments will be served at the end of this event.