Suchergebnisse

Les équations du mouvement du système de quatre corps Soleil (S) - Terre (T) - Lune (L) - satellite artificiel (σ), qui s'attirent suivant la loi de Newton, sont établies dans l'hypothèse où (S), (L), (σ) sont réduits à leurs centres de gravité S, L, σ, de masses respectives ms, mL, mσ, (T) étant un ellipsoïde de centre T, d'axes 2a, 2c (a > c), de révolution autour de c, homogène, de densité p. Ces équations étant remplacées par un système équivalent d'équations intégrales dans lesquelles sont explicitées les conditions initiales, on déduit de ce système une suite d'itérations intégrales. En appliquant lorsqu'il y a lieu, au calcul de certaines intégrales de cette suite, une convention bien définie, déjà énoncée dans une note antérieure, on obtient des suites de fonctions qui convergent uniformément vers les solutions des équations différentielles du mouvement de (S), (T), (L), (σ). Cette convergence a lieu en particulier dans tout intervalle de temps T — t0 pendant lequel les distances mutuelles de S, T, L, σ, restent supérieures ou égales à (1 + b)a (b = 1 ou << 1) Ces propriétés sont établies pour le système Soleil-Terre-Lune et pour le système Soleil-Terre-Lune-satellite artificiel.

La jachimovite appartient au système triclinique, groupe spatial Pl. Ses paramètres, déterminés par Mélon et Dejace, sont a = 7,04 Å, b = 9,18 Å, c = 6,66 Å, ɑ = 109°14', β = 90°00' et γ = 108°22'. Z = 1[CuH2(UO2SiO4)2 . 5H2O].
La méthode d'investigation était la diffraction des RX par un monocristal. L'interprétation de la fonction de Patterson, suivie de synthèses de Fourier normales et des différences, montre que le minéral présente une structure en feuillets parallèles, constitués par les ions (UO2SiO4)[formula] unis entre eux par les cations Cu++.

Considering one reference level surface, not external to the topographical earth surface, which contains an equal mass and turns round the same axis of rotation, the author proves the two fundamental equations of the dynamical geodesy (boundary conditions satisfied for the disturbing potential) valuable to the linear approximation for the distances between the two surfaces, respectively for the continental and ocean parts of the topographical earth surface.
Then, the integral equation is obtained, which gives the disturbing potential. Taking into account the boundary conditions, it is possible to get the local distance between the two surfaces in function of the values either global or regional of the measured gravity, the theoretical gravity and the vertical gradient of the theoretical gravity, by means of an integral equation.
For the case where the reference surface is partly external to the topographical surface, the author introduces an external level surface and gives two integral equations to solve the problem regionally.

Synopsis. — The explicit form of the local potential introduced by I. Prigogine and the author in view of deducing the laws of continuous media from a general variational principle, is calculated for the case of the usual transport effects, the phenomenological coefficients being taken as variable quantities. Different expressions for the steady state local potential are obtained, which are then discussed in relation to an absolute minimum criterion. The possibility of a generalization to non steady state situations is also considered. With respect to the computational techniques, the similarities and differences of the local potential method and of the so called Galerkin method are also discussed.

The way in which Switzerland resolves the problem of the representation of linguistic minorities in the commissions of its federal assembly is examined in its juridical as well as sociol'al aspects. The Swiss Constitution provides that all parties & languages must be equitably represented. On the basis of original res carried out by the author & his assistant, Michel Renaud (U of Lausanne, Switzerland), a comprehensive analysis of the composition & functioning of the federal dept's of the Swiss Republic as well as that of the State Councils is presented. The representation of the Romansh-speaking minority & of the pop of Tessin Italian-speaking in the federal commissions & in the chairmanship to these commissions is examined & documented by statistics. In the actual functioning of the commissions, German & French are the 2 languages used in the debates; in the nat'l assembly sessions but not in the state assemblies, a simultaneous interpretation system is used. In the Councils, French is generally used; in the Commissions German. Minority council & assembly members use the dominant language, but are often handicapped by their insufficient knowledge of it; however, the great majority of deputies understand French & German sufficiently to follow the essential outlines of the debates & discussions. Documents are issued in both German & French. In the opinion of one gov representative, the Romansh & Tessin deputies have a tendency to absent themselves from long debates in German; statistical verification of this statement does not exist. It is seen that while role of the minority representatives is limited in the Swiss gov, the minorities are given just representation, from which they benefit. Ideological & soc divisions are stronger in Switzerland than linguistic divisions. The linguistic problem has no pol'al relevance. With good will on the part of the minorities, a balance is maintained which surmounts the general difficulties of coexistence of pop's linguistically diff'iated in the pol'al arena. 14 Tables. M. Maxfield.