Distribution of AC Contact Network Electric Field Strenght

To provide the stock electromagnetics compatibility is a serious problem with the contemporary development of the railway transport and implementation of lines for connection. The AS contact system is on of the main equipment of the electrify railway transport that implements the electrical connection between the traction substations and the roiling stock. But it is also one of the main sources of interference due to the presence of its strong electromagnetic field. The paper present an distribution of electric intensity by contact system

The problem of synthesis of functionally steady information systems in railway transport

Control and operation exploitation of high-rate railway transport are the fundamental object of programs of European Council where the rail traffic information system is the real touchstone of European co-operation.In the article examined weigh complex of researches in area of the functional steady information systems. The paper presents the problem about the functional stability of radio communication systems of safety responsibility in railway transport and proposes a number of approaches to solve it. The following problems have been solved: 1. Setting the problem of the functional stability of radio communication systems of safety responsibility and giving reasons for an approach to its solution. 2. Examination on the possibilities of building functionally stable information systems. The decided tasks and got results are analyzed perspective directions of researches are described in this area stability

Modeling protein flexibility by distance geometry

National audienceThis long abstract discusses a strategy for modeling protein flexibility which is based on the discretization of the space of possible molecular conformations for a protein. The same discretization process was previously employed for discretizing Molecular Distance Geometry Problems (MDGPs)

Sparsifying Distance Matrices for Protein-Protein Structure Alignments

International audienceThe problem of finding similarities between native protein conformations can be formulated as the problem of aligning inter-residue distance matrices. Recently proposed exact algorithms are able to solve this problem for large proteins only if the considered distance matrices are sparse. We propose a strategy for sparsifying distance matrices in which we keep the distances needed for uniquely reconstructing the conformations of the proteins

Enhanced surveillance for acute and likely acute hepatitis B in Canada: 1999 to 2002

OBJECTIVE: To assess the incidence of clinically identified hepatitis B cases, as well as the demographic and risk behaviour profiles of these cases in a defined Canadian population