Suchergebnisse

Le spectromètre infrarouge ESO 13, construit conjointement par l'ONERA (France) et l'IASB (Belgique), effectuera en 1983, des observations du limbe terrestre en absorption au coucher ou au lever du soleil, ainsi qu'en émission à partir du véhicule spatial «Spacelab ». L'organisation des intervalles spectraux et des programmes d'observation est présentée ainsi que les raisons des choix effectués pour le premier vol.

Working within the formalism developed by Professor I. Prigogine and his coworkers, this paper examines both the perturbation series obtained by iterating the resolvent equation and the irreducible operators introduced by this means. It is shown that the series can be regarded as asymptotic in a certain sense but that this interpretation is not useful for long time behaviour. Instead of performing the usual resummation of the series it is shown that the irreducible operators can be defined in an entirely rigorous way independent of the series expansion. The advantages of this approach and its connection with the usual procedure are pointed out.

Starting from a suitable formulation of the exact dynamics, it is shown how the time evolution of an N-body quantum or classical system can be described by a strongly continuous group of unitary operators acting on a Hilbert space. We introduce the Liouville operator and its resolvent and prove some of their properties which are of importance in non-equilibrium statistical mechanics as developed by the Brussels school.

Volume II is divided into ten sections, covering (a) provinces, districts and land tenure, (b) administration and development, (c) demography, (d) rainfall and natural regions, (e) water resources and water development, (f) agriculture, (g) commercial activity, (h) infrastructure, (i) services and (j) bibliography on rural development in Rhodesia/Zimbabwe. In each section the data are presented in either maps, charts or tables depending on what is most appropriate. (DÜI-Hff)

Steven L. Burg, Russians, natives and Jews in the Soviet scientific elite. Cadre competition in Central Asia.
Increasing members of non-Russians, and especially of Central Asians, have been entering the ranks of the Soviet scientific and technical elite since the end of World War II. High proportions of these cadres remain in their titular republics, giving rise to a process of "nativization" of the scientific elite. "Nativization" in Central Asia is producing increased competition for positions there and, consequently, increased inter-ethnic tensions between native and non-native cadres. Soviet sociologists suggest that such tensions can be controlled by ensuring continued upward mobility for native cadres. One means by which the central Soviet leadership might attempt to ensure such mobility is the gradual removal of Jewish cadres from positions in Central Asia and their replacement by natives. This might be achieved simply as the result of the natural reduction in the number of Jewish cadres likely to result from death, emigration, and the declining number of new Jewish candidates for positions. If this natural decrease is not sufficient, the Soviet leadership is likely to remove Jews forcibly.