En s'appuyant sur des dossiers du ministère de l'Immigration relatifs à la formation des domestiques britanniques à la vie canadienne, au cours des années 20, cet article établit une comparaison entre les fourneaux de cuisine, l'alimentation et les travaux ménagers tels qu'on les connaissait en Grande-Bretagne et au Canada. Il établit aussi d'autres comparaisons au moyen de documents et d'illus...

Une s&ie de travaux, dont le progrSs des rfsultats a fit6 retrac6 par Palade (1), a d6montr6 l'existence du retieulum endoplasmique dans la majorit6 des cat@ories de cellules animales. Dans le cas de fibres musculaires strikes, Bennett et Porter (2) ont mis en 6vidence, entre les myofibrilles, un syst~me de membranes intrasarcoplasmiques qu'ils ont identifi6 avec le reticulum endoplasmique des ...

Résumé Les accidents vasculaires cérébraux sont des accidents rares mais graves durant la grossesse et le post-partum, ils sont responsable d'une mortalité et d'une morbidité élevée, la pré éclampsie, l'éclampsie et les accidents vasculaires cérébraux sont significativement liés. Le dysfonctionnement endothélial, l'altération de l'autorégulation cérébrale, et l'hypertension sévère sont, probabl...

This study was conducted to determine if salmon carcasses (from spawning adults) increased stream biofilm ash-free dry mass (AFDM) and benthic macroinvertebrate abundance in southeastern Alaska, U.S.A. Thirty-six once-through artificial streams were situated along, and received water and drifting invertebrates from, a natural stream. Two treatments (salmon carcass, control) were sampled six tim...

Sun's announcement of the programming language Java more than anything popularized the notion of mobile code, that is, programs travelling on a heterogeneous network and automatically executes upon arrival at the destination. We describe several classes of mobile code and we extract their common characteristics, where security proves to be one of the major concerns. With these characteristics a...

Late-successional riparian forests often regulate autotrophic microhabitats in low-order streams through shading provided by canopies. However, few studies have linked forest structure with periphyton microhabitat in adjoining streams. Our hypotheses were that (1) the heterogeneous horizontal structure in old-growth forests creates more spatially variable below-canopy light environments compare...

We characterized structural and functional attributes along hills lope gradients in headwater catchments. We endeavored to identify parameters that described significant transitions along the hills lope. On each of four catchments, we installed eight 50 m transects perpendicular to the stream. Structural attributes included woody and herbaceous vegetation; woody debris and forest floor mass, ni...

We consider the problem of optimal management of energy contracts, with bounds on the local (time step) amounts and global (whole period) amounts to be traded, integer constraint on the decision variables and uncertainty on prices only. After building a nite state Markov chain by using vectorial quantization tree method, we rely on the stochastic dual dynamic programming (SDDP) method to solve ...