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See detailLe design du système de contrôle de gestion des PME : une quête de stabilité adaptative
Van Caillie, Didier ULg; Santin, Sarah; Rouhana, Rima ULg

in Actes du XXIIIème Congrès de l'Association Francophone de Comptabilité (2008, May)

This paper discusses the characteristics of management control systems in SMEs and insists on their ability to monitor change and performance in high turbulent environment

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See detailImpact du recours à une table de spécification sur la construction de test à choix multiples appliqué à la pathologie de la reproduction en médecine vétérinaire.
Hanzen, Christian ULg; Theron, Léonard ULg; Sterkendries, José et al

in Les Actes du 25ème congrès. Montpellier 19-22 mai 2008 (2008, May)

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See detailOptiView − A Powerful and Flexible Decision Tool Optimising Space Allocation in Shipyard Workshops
Caprace, Jean-David ULg; Bair, Frédéric ULg; Losseau, Nicolas ULg et al

in Conference on Computer Applications and Information Technology in the Maritime Industries (COMPIT) (2008, May)

This paper presents new developments to maximize the number of ship blocks and ship sections produced in various workshops of shipyards during a certain time window. The visualization tool OptiView® was ... [more ▼]

This paper presents new developments to maximize the number of ship blocks and ship sections produced in various workshops of shipyards during a certain time window. The visualization tool OptiView® was developed to support users to improve the space utilization and workshop productivity. The software is coupled with a heuristic optimisation solver. The paper describes the approach to the space allocation problem and gives three application examples. [less ▲]

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See detailPolyhedral properties for the intersection of two knapsacks
Louveaux, Quentin ULg; Weismantel, Robert

in Mathematical Programming (2008), 113(1), 15-37

We address the question to what extent polyhedral knowledge about individual knapsack constraints suffices or lacks to describe the convex hull of the binary solutions to their intersection. It turns out ... [more ▼]

We address the question to what extent polyhedral knowledge about individual knapsack constraints suffices or lacks to describe the convex hull of the binary solutions to their intersection. It turns out that the sign patterns of the weight vectors are responsible for the types of combinatorial valid inequalities appearing in the description of the convex hull of the intersection. In partic- ular, we introduce the notion of an incomplete set inequality which is based on a combinatorial principle for the intersection of two knapsacks. We outline schemes to compute nontrivial bounds for the strength of such inequalities w.r.t. the intersection of the convex hulls of the initial knapsacks. An extension of the inequalities to the mixed case is also given. This opens up the possibility to use the inequalities in an arbitrary simplex tableau. [less ▲]

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See detailRéguler les enseignements dans une approche qualité l'apport diagnostic du modèle du polygone des paramètres des actions didactiques
Gilles, Jean-Luc ULg; Bosmans, Catherine ULg; Mainferme, Renaud ULg

in 25ème Congrès de l'Association Internationale de Pédagogie Universitaire (AIPU) - "Le défi de la qualité dans l'enseignement supérieur : vers un changement de paradigme" (2008, May)

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See detailGérer et contrôler la qualité des évaluations standardisées à l'aide de la plateforme open source ExAMS
Gilles, Jean-Luc ULg; Detroz, Pascal ULg

in 25ème Congrès de l'Association Internationale de Pédagogie Universitaire (AIPU) - "Le défi de la qualité dans l'enseignement supérieur : vers un changement de paradigme" (2008, May)

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See detailArchitecture of a Grid-Enabled Lattice-Boltzmann Middleware
Dethier, Gérard ULg; Marchot, Pierre ULg; de Marneffe, Pierre-Arnoul ULg

Poster (2008, May)

Lattice-Boltzmann (LB) simulation methods constitute a family of computational fluid dynamics methods that can deal with complex multiphysics models and are easily parallelizable. They are based on ... [more ▼]

Lattice-Boltzmann (LB) simulation methods constitute a family of computational fluid dynamics methods that can deal with complex multiphysics models and are easily parallelizable. They are based on modified lattice-gas automata. The algorithm of LB simulations is quite simple. Space is discretized into a lattice. Each node of this lattice has a state. This state indicates the proportion of particules moving along fixed directions (these proportions are generally called “fields”). At each time step, the state of all lattice nodes is updated. Each node first receives fields coming from its neighbors and then “collides” them by applying a collision operator which generates the new state. Grid computing can be defined as “coordinated resource sharing and problem solving in dynamic, multi-institutional collaborations”. In practice, a Grid user (which can be a software component) submits a job composed of tasks to the Grid. The tasks are automatically run on available computational resources across organizational boundaries (i.e. clusters of multiple departments). LaBoGrid is an application combining the concepts of LB modelling and Grid computing. It is able to run LB simulations on an arbitrary number of computational resources from a Grid. It deals with operating system and hardware performance heterogeneity. The former because LaBoGrid is written in Java. The latter thanks to load-balancing. This is essential because all LaBoGrid tasks are inter- connected and depend on information from one another. A slow LaBoGrid task will slow down the overall process. LaBoGrid is based on asynchronous agents exchanging messages. The two main agents are the Controller agent (CA) and the distributed agent (DA). In a deployed LaBoGrid system, the CA exists in only one instance. It keeps track of the DAs and their topology. A task agent running some arbitrary code can be attached to the CA (CAT) and the DAs (DAT). In LaBoGrid, LB-specialized task agents are used (this system could be adapted to other problems). A configuration file parsed by the LB CAT gives the parameters of an LB simulation. The LB CAT configures automatically the LB DATs which handle the simulation code. Currently, LB simulations are done on 3D fluids with 19 fields per state. However, the code can be adapted very easily to other fluid dimensions and different state definitions, storage and computation precisions and collision types. [less ▲]

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See detailA binary signature in the non-thermal radio-emitter Cyg OB2 #9
Nazé, Yaël ULg; De Becker, Michaël ULg; Rauw, Grégor ULg et al

in Astronomy and Astrophysics (2008), 483

Aims. Non-thermal radio emission associated with massive stars is believed to arise from a wind-wind collision in a binary system. However, the evidence of binarity is still lacking in some cases, notably ... [more ▼]

Aims. Non-thermal radio emission associated with massive stars is believed to arise from a wind-wind collision in a binary system. However, the evidence of binarity is still lacking in some cases, notably Cyg OB2 #9. Methods: For several years, we have been monitoring this heavily-reddened star from various observatories. This campaign allowed us to probe variations both on short and long timescales and constitutes the first in-depth study of the visible spectrum of this object. Results: Our observations provide the very first direct evidence of a companion in Cyg OB2 #9, confirming the theoretical wind-wind collision scenario. These data suggest a highly eccentric orbit with a period of a few years, compatible with the 2 yr-timescale measured in the radio range. In addition, the signature of the wind-wind collision is very likely reflected in the behaviour of some emission lines. [less ▲]

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See detailLes Codes - La Charte
Behrendt, Christian ULg; Bourgeois, Marc ULg; Lewalle, Paul ULg et al

Book published by Editions Juridiques (2008)

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See detailwhat smell decaying pig carcasses
Dekeirsschieter, Jessica ULg; Verheggen, François ULg; Lognay, Georges ULg et al

(2008, May)

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See detailPrise en charge du sportif lombalgique : analyse critique et perspectives
Vanderthommen, Marc ULg; Demoulin, Christophe ULg

in Abstract book du Congrès de l’Association Belge des Kinésithérapeutes du Sport « La Réathlétisation » (2008, May)

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See detailAm Stram Gram... Electrocardiogramme (un guide simple et pratique pour l'interprétation de l'ECG).
JEDIDI, Zayd ULg

Learning material (2008)

Un guide simple et pratique pour l'interprétation de l'ECG en pratique clinique quotidienne. Nombreuses illustrations et exemples.

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See detailInfo-congrès: le congrès de l'ALFEDIAM se tenant à Bruxelles
RADERMECKER, Régis ULg

in Revue de l'Association Belge du Diabète (2008), 51

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See detailHeat Pumping and Reversible Air Conditioning: How to make the best use of HVAC equipment ?
Bertagnolio, Stéphane ULg; Lebrun, Jean ULg; Andre, Philippe ULg et al

in Proceedings of the 9th International IEA Heat Pump Conference, Zurich, Switzerland (2008, May)

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See detailAn overlay maintenance protocol for overlay routing on top of ad hoc networks
Calomme, Sandrine; Leduc, Guy ULg

in Lecture Notes in Computer Science (2008, May), 4982

The protocol described in this paper builds and maintains an overlay topology on top of an ad hoc network. The overlay is intended to be used by a routing application. As flooding is a key component of ... [more ▼]

The protocol described in this paper builds and maintains an overlay topology on top of an ad hoc network. The overlay is intended to be used by a routing application. As flooding is a key component of many route discovery mechanisms in MANETs, we evaluate the delivery percentage, bandwidth consumption and time duration of flooding a message on the overlay. We also consider the overlay path stretch as an indicator for the data transfer transmission time. The protocol does not require any information from the underlay routing protocol, nor cooperation from the nodes that do not belong to the overlay. Each overlay node maintains a set of nearest overlay nodes and exchanges its neighbourhood information with them in order to select useful overlay links. Resilience is afforded by setting a minimum number of overlay neighbours. The performance observed over OLSR are good, for all overlay densities and mobility level studied. [less ▲]

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