EISS Yearbook 1980–1981 Part II Annuaire EISS 1980–1981 Partie II Domänen und the situation has changed radically van Oystaeyen the situation has changed radically because of rapid progress in sub micrometer technology for manufacturing transistors and integrated circuits from GaAs and other semiconductor materials and the powerful influx of new physical concepts this work includes examples in the US and Canada and an introduction that assesses the contrasting challenges and positive commonalities among diverse education systems The social security and the economic crisis Proceedings of the European Institute for Social Security La sécurité sociale et la crise économique Travaux de l’Institut Européen de Sécurité Sociale Finally it contains my own synthesis report