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Showing papers by "Tunis University published in 1982"


Journal ArticleDOI
Ridha Ferchiou1
TL;DR: In this article, the authors examined the indirect effects of new housing construction on the redistribution of old housing stock in developing countries and found that dwellings in the middle range of values initiated the longest chains of moves, but that as even these chains end before reaching the poorest families, filtering strategies need to be complemented by a positive programme of slum-upgrading.
Abstract: The aim of this paper is to examine the indirect effects of new housing construction on the redistribution of old housing stock in developing countries. The basic data for the study comes from the author's work in Tunisia, with comparative illustration from similar studies in Mexico, and is used to test a certain number of conclusions on filtering derived from empirical studies undertaken in developed countries. The conclusions are that dwellings in the middle range of values initiated the longest chains of moves, but that as even these chains end before reaching the poorest families, filtering strategies need to be complemented by a positive programme of slum-upgrading.

19 citations


Journal ArticleDOI
01 Dec 1982
TL;DR: In this article, the hyperfine structures (hfs) of the levels of the 5d2 and 5d6s configurations of La II, recently measured very accurately by Hohle, Huhnermann and Wagner, are interpreted in the classical parametric scheme.
Abstract: The hyperfine structures (hfs) of the levels of the 5d 2 and 5d6s configurations of La II, recently measured very accurately by Hohle, Huhnermann and Wagner, are interpreted in the classical parametric scheme. For the magnetic part, the contribution of the two-body far-configuration-mixing effects is determined accurately from the hfs of four levels, and compared with an ab-initio evaluation. For the electric part, all three 5d parameters are determined. The Sternheimer corrections to the radialr −3 integral are computed by the Multiconfigurational-Hartree-Fock method, and a corrected value of the electric-quadrupole nuclear moment is deduced:Q(139La)=0.20(1) 10−24 cm2.

16 citations