A new Lagrange-multiplier based ®ctitious-domain method is presented for the direct numerical simulation of viscous incompressible ̄ow with suspended solid particles. The method uses a ®niteelement discretization in space and an operator-splitting technique for discretization in time. The linearly constrained quadratic minimization problems which arise from this splitting are solved using conju...

| This paper presents a new general method for computing the diierent speciic power system small signal stability conditions. The conditions include the points of minimum and maximum damping of oscillations, saddle node and Hopf bifurcations, and load ow feasibility boundaries. All these characteristic points are located by optimizing an eigenvalue objective function along the rays speciied in ...

Coagulase-negative staphylococci (CoNS) are the main cause of catheter-related infections, especially among immunosuppressed and neutropenic patients, as well as a source of bacterial contamination in blood cultures. Using biochemical identification and pulsed-field gel electrophoresis (PFGE), we sought to identify possible clonal isolates of bacteremia in patients with central lines in an onco...

The characterization of two-phase flow has been commonly based on homogeneous wet capillary models, which are limited to heterogeneous porous media. In this work, pressure and relative permeability models for three systems derived, enable the analysis effect oil-wet ratio mechanism. pressures, permeabilities water cut curves simulated at primary drainage stage. results show that water-wet exhib...

Industrial turbomachinery design requires fast and reliable algorithms for the numerical optimization of design parameters that innuence the ow in the turbomachine. The problem considered in this paper is to determine the cross-sectional shape of a blade in a turbomachine in order to reproduce as well as possible a given velocity proole of the ow around the blade. It is formulated as a least sq...

Much recent planning research has focused on two related issues. First, there has been a strong interest in information-gathering (or \sensing", or \knowledge-producing") actions. Second, has been an investigation of plans with sophisticated control structures, such as conditional branches and loops. But the combination of these two lines of research poses a represen-tational problem: plans wit...

Work ow technology, whose role is to automate business processes and to provide a support for their management, is today an active sector of research. This thesis deals with the modelling of the work ow processes and their analysis. These processes, probably constrained by shared resources or by durations of treatment, must be checked before being executed by their work ow management systems. I...

Much recent planning research has focused on two related issues. First, there has been a strong interest in information-gathering (or \sensing", or \knowledge-producing") actions. Second, has been an investigation of plans with sophisticated control structures, such as conditional branches and loops. But the combination of these two lines of research poses a representational problem: plans with...

We introduce a low-level description of image motion called the local translational decomposition (LTD). This description associates with image features or small image areas , a three-dimensional unit vector describing the direction of motion of the corresponding environmental feature or small surface area. The local translational decomposition is derived by applying a procedure for processing ...