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In this note we define three invariants of contact structures in terms of open books supporting the contact structures. These invariants are the support genus (which is the minimal genus of a page of a supporting open book for the contact structure), the binding number (which is the minimal number of binding components of a supporting open book for the… (More)
An in-depth study of the computational environment at Lawrence Livermore National Laboratory provides insights into the types ofsystems neededfor detailed numeric modeling.
The fact that numerous risk factors are continuous raises the problem of the boundary between the normal and the pathological states. Moreover, a risk factor approach to disease deeply calls into question the relevance of these concepts. In this paper, I propose an epistemological analysis of the notion of "continuity" as it is used in the context of "risk… (More)
BACKGROUND Begun in 1947 and still ongoing, the epidemiological study of heart disease known as the Framingham study was one of the first prospective studies based on a large cohort and has rapidly been considered as the prototype and model for the cohort study. Nevertheless, an examination of its history reveals that the protocol does not at all correspond… (More)
We show that two open books in a given closed, oriented three-manifold admit isotopic stabilizations, where the stabilization is made by successive plumbings with Hopf bands, if and only if their associated plane fields are homologous. Since this condition is automatically fulfilled in an integral homology sphere, the theorem implies a conjecture of J.… (More)
This article presents an overview of the plan of transformation of services adopted in 1998 at Louis-H. Lafontaine Hospital. The authors present the history, principles and models, the role played by outpatients clinics as well as the challenges related to the implementation of this new plan.