3,427 research outputs found
Le placement des enfants au QuĂ©bec, des annĂ©es 1930 Ă aujourdâhui. Une mesure trop souvent utilisĂ©e? Constatations et hypothĂšses
Depuis plusieurs dĂ©cennies, nombre d'Ă©tudes et de rapports aussi bien privĂ©s que publics posent le problĂšme du placement des enfants au QuĂ©bec et formulent l'hypothĂšse du recours excessif Ă cette mesure. On aurait trop souvent retirĂ© des enfants de leur milieu familial pour les placer en institution ou en famille d'accueil, alors que, dans bien des cas, des mesures de soutien Ă domicile auraient pu prĂ©server la cohĂ©sion familiale. Le prĂ©sent texte retrace l'Ă©volution du placement au QuĂ©bec depuis les annĂ©es 1930, tant du point de vue qualitatif que quantitatif, et propose quelques Ă©lĂ©ments juridiques et socioculturels explication de la situation particuliĂšre du QuĂ©bec dans ce domaine.Many reports and studies issued either by private agencies or public bodies have dealt with the problem of child placement in Quebec. Some children have been removed from their family to be placed in foster homes or residential premises while offering them and their families community support services would have sometimes been more appropriate in order to keep the family together. This paper explains how child placement evolved in Quebec since 1930 and suggests some legal, social and cultural reasons for Quebecâs particular situation regarding that matter
Charles-Ădouard Bourgeois et Gonzalve Poulin. Deux visions diffĂ©rentes des services Ă lâenfance dans le QuĂ©bec des annĂ©es quarante.
Une grande effervescence caractĂ©rise le QuĂ©bec des annĂ©es quarante. La croissance et l'urbanisation massives de la population, de mĂȘme que les traumatismes engendrĂ©s par la crise Ă©conomique des annĂ©es trente, entraĂźnent de profonds bouleversements sociaux qui se rĂ©percutent sur la vie familiale et la situation des enfants. Dans ce contexte inĂ©dit, deux courants de pensĂ©e s'affrontent: l'un, traditionaliste, mise sur la consolidation et l'amĂ©lioration des institutions en place, trĂšs majoritairement dirigĂ©es par des religieux; l'autre, moderniste, prĂ©conise une plus grande intervention de l'Ătat dans le domaine social et une diversification des services. Les points de vue de l'abbĂ© Bourgeois et du pĂšre Poulin illustrent bien ces deux visions, qui trouveront notamment Ă s'exprimer au sujet de la Loi de la protection de l'enfance de 1944, adoptĂ©e sous le gouvernement libĂ©ral d'AdĂ©lard Godbout, mais subsĂ©quemment mise Ă l'Ă©cart sous le gouvernement unioniste de Maurice Duplessis
The microscopic theory of fission
Fission-fragment properties have been calculated for thermal neutron-induced
fission on a target, using constrained
Hartree-Fock-Bogoliubov calculations with a finite-range effective interaction.
A quantitative criterion based on the interaction energy between the nascent
fragments is introduced to define the scission configurations. The validity of
this criterion is benchmarked against experimental measurements of the kinetic
energies and of multiplicities of neutrons emitted by the fragments.Comment: 8 page, 4 figures, to be published in Proceedings of the 4th
International Workshop on Fission and Fission Product Spectroscop
Astrophysical Implication of Low E(2^+_1) in Neutron-rich Sn Isotopes
The observation and prediction of unusually depressed first excited 2^+_1
states in even-A neutron - rich isotopes of semi-magic Sn above 132Sn provide
motivations for reviewing the problems related to the nuclear astrophysics in
general. In the present work, the beta-decay rates of the exotic even Sn
isotopes (134,136Sn) above the 132Sn core have been calculated as a function of
temperature (T). In order to get the necessary ft values, B(GT) values
corresponding to allowed Gamow Teller (GT-) beta-decay have been theoretically
calculated using shell model. The total decay rate shows decrease with
increasing temperature as the ground state population is depleted and
population of excited states with slower decay rates increases. The abundance
at each Z value is inversely proportional to the decay constant of the waiting
point nucleus for that particular Z. So the increase in half-life of isotopes
of Sn, like 136Sn, might have substantial impact on the r-process
nucleosynthesis.Comment: 4th International Workshop on Nuclear Fission and Fission Product
Spectroscopy, CEA Cadarache, May 13 - 16, 2009, 4 pages, 2 figure
- âŠ