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See detailFully coupled simulation of mechatronic and flexible multibody systems: An extended finite element approach
Bruls, Olivier ULg

Scientific conference (2009, November)

In this talk, I will discuss some extensions and refinements of classical finite element tools for the numerical simulation of complex mechatronic systems. The presentation will be divided into three main ... [more ▼]

In this talk, I will discuss some extensions and refinements of classical finite element tools for the numerical simulation of complex mechatronic systems. The presentation will be divided into three main parts. In the first part, I will show how this approach allows the modeling of dynamic systems with large amplitude motions composed of rigid bodies, flexible bodies, kinematic joints, actuators, sensors and control units. A fully coupled model of a semi-active suspension will be used to illustrate the methodology. The second part will focus on some numerical aspects concerning the time integration of the equations of motion which have the structure of strongly coupled differential-algebraic equations on a Lie group. The treatment of large rotation variables and of the coupling between control state variables and mechanical generalized coordinates will be discussed in more detail. In the third part, the simulation tool will be exploited for the topology optimization of structural components embedded in multibody systems. Generally, topology optimization techniques use simplified quasi-static load cases to mimic the complex dynamic loadings in service. In contrast, I will present an optimization procedure which properly accounts for the actual dynamic interactions which occur during the motion of the flexible multibody system. In order to illustrate the benefits of this integrated design approach, the optimization of a two degrees-of-freedom robot arm with flexible truss linkages will be analyzed. [less ▲]

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See detailSharing one's death : Le Tombeau de Théophile Gautier (1873)
Durand, Pascal ULg

in Whidden Seth (Ed.) Models of Collaboration in Nineteenth-Century French Literature : Several Authors, One Pen (2009)

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See detailVers une taxonomie des profils d'entrée dans un processus de défaillance : un focus sur les micros et petites entreprises en difficulté
Crutzen, Nathalie ULg; Van Caillie, Didier ULg

in Revue Internationale PME (2009), 22(1), 103-128

Previous literature on business failure demonstrates the failure process varies from one failing firm to another. In particular, Argenti (1976) and Laitinen (1991) argue all firms do not enter in a ... [more ▼]

Previous literature on business failure demonstrates the failure process varies from one failing firm to another. In particular, Argenti (1976) and Laitinen (1991) argue all firms do not enter in a failure process for the same reasons. Nevertheless, despite this theoretical affirmation, few researches propose a taxonomy (or a typology)1 that differentiates several typical “entry doors” in a failure process. Moreover, none of them really focuses on micro and small firms while the literature argues their failure is specific and very common (Julien, 2005). Considering these gaps in the literature and on the basis of an inductive and qualitative analysis, this article proposes an original contribution. Focused on micro and small distressed firms, it presents a taxonomy that highlights seven specific “entry doors” in a failure process. [less ▲]

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See detailFirst example of “click” copper(I) catalyzed azide-alkyne cycloaddition in supercritical carbon dioxide: Application to the functionalization of aliphatic polyesters
Grignard, Bruno ULg; Schmeits, Stephanie ULg; Riva, Raphaël ULg et al

in Green Chemistry (2009), 11

The modification of aliphatic polyesters by the copper(I) catalyzed azide-alkyne cycloaddition (CuAAC) was successfully implemented in supercritical carbon dioxide (scCO2). Due to the remarkable ... [more ▼]

The modification of aliphatic polyesters by the copper(I) catalyzed azide-alkyne cycloaddition (CuAAC) was successfully implemented in supercritical carbon dioxide (scCO2). Due to the remarkable properties of scCO2, the CuAAC reaction turned out to be quantitative even though the aliphatic polyesters used in this work were insoluble in scCO2. Interestingly enough, the conditions were mild enough to prevent polymer degradation from occurring and finally, efficient removal of the catalyst (>96%) was achieved by scCO2 extraction. [less ▲]

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See detailMicrofluidic on a wire
Terwagne, Denis ULg; Vandewalle, Nicolas ULg; Gilet, Tristan ULg

Poster (2009, November)

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See detailQuantifying ASes Multiconnectivity Using Multicast Information
Mérindol, Pascal; Van den Schriek, Virginie; Donnet, Benoît ULg et al

in 9th ACM SIGCOMM Conference on Internet Measurement (2009, November)

Redundant connectivity (or multiconnectivity) between adjacent autonomous systems (ASes) is important for inter-domain traffic engineering and fast recovery in case of failures. However, the redundancy of ... [more ▼]

Redundant connectivity (or multiconnectivity) between adjacent autonomous systems (ASes) is important for inter-domain traffic engineering and fast recovery in case of failures. However, the redundancy of ASes business relationship links has not been quantitatively studied, mainly due to the difficulty of obtaining relevant data. In this paper, we show that the mrinfo multicast monitoring tool can provide useful data about the Internet topology and such redundant links in particular. Our analysis relies on more than four years of daily queries to about ten thousand routers mapped into more than two hundred ASes. We demonstrate that peering links between ASes are frequently redundant. In particular, our analysis shows that more than half of the studied ASes pairs are connected through multiple physical links. We then refine our analysis by considering the different types of ASes and their business relationships. A particular result of our analysis is that at least 75% of the peer-to-peer relationships between adjacent Tier-1 ASes are redundant, i.e., the con- nections between these ASes involve several physical links. Our analysis is conservative, providing so a lower bound, as some links might not be seen by mrinfo due to ISPs filtering policies. [less ▲]

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See detailLa promotion de la santé en Communauté française, une variabilité de pratiques en regard d'un même décret
Absil, Gaëtan ULg; Caillet, Sarah

in Education santé (2009), (250), 8-9

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See detailChoisir son assiette pour que tout le monde soit à la fête
Ozer, Pierre ULg

Article for general public (2009)

En décembre, les chefs d’Etats se réunissent à Copenhague pour tenter de lutter contre le réchauffement climatique. Et en décembre, nous préparons de copieux repas pour les fêtes de fin d’année. Cela peut ... [more ▼]

En décembre, les chefs d’Etats se réunissent à Copenhague pour tenter de lutter contre le réchauffement climatique. Et en décembre, nous préparons de copieux repas pour les fêtes de fin d’année. Cela peut être l’occasion d’aider, à notre échelle, à préserver la planète. [less ▲]

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See detailLa promotion de la santé en Communauté française de Belgique : entre enfermements et ouvertures ?
Absil, Gaëtan ULg

in Education Santé (2009), (250), 16-17

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See detailPrévention, réseaux et parentalité : l'accompagnement global en consultation prénatale
Absil, Gaëtan ULg; Prato, Elise

in Education Santé (2009), (250),

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See detailLa promotion de la santé se décrète-t-elle ?
Absil, Gaëtan ULg; Vandoorne, Chantal ULg

in Education Santé (2009), (250), 5

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See detailComment j'explore... les troubles dystoniques : un guide simple et pratique
JEDIDI, Zayd ULg; Scholtes, Félix ULg; Kaschten, Bruno ULg et al

in Revue Médicale de Liège (2009), 64

La rencontre d'une dystonie, que ce soit en tant que symptôme entrant dans un cadre nosologique plus large ou en tant qu’anomalie isolée, n’est pas exceptionnelle en pratique clinique. La dystonie peut se ... [more ▼]

La rencontre d'une dystonie, que ce soit en tant que symptôme entrant dans un cadre nosologique plus large ou en tant qu’anomalie isolée, n’est pas exceptionnelle en pratique clinique. La dystonie peut se produire à tous âges de la vie. Un diagnostic précis est important afin d’optimiser la prise en charge de ces affections souvent chroniques et invalidantes. Les divers examens complémentaires devront inclure la résonance magnétique nucléaire, incontournable dans le diagnostic et le suivi des patients dystoniques. Nous présentons ici un aperçu des troubles dystoniques les plus fréquents et des solutions thérapeutiques appropriées, ainsi qu’une proposition de classification afin d’en simplifier le diagnostic. [less ▲]

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See detailUne démarche d'autoévaluation d'un programme centré sur l'alimentation
Miermans, Marie-Christine ULg

in Education Santé (2009), (250), 12

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See detailPromotion de la santé, prévention, éducation pour la santé : parle-t-on de la même chose ?
Vandoorne, Chantal ULg

in Education Santé (2009), (250), 6-7

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See detailInnover à partir d’une ressource cognitive utopique : le cas des consultants en justice réparatrice
Dubois, Christophe ULg

in Bernard, Benoit (Ed.) Le management des organisations judiciaires (2009)

En publiant la circulaire ministérielle du 4 octobre 2000, Marc Verwilghen, alors ministre de la Justice, décide d’introduire le concept de justice réparatrice en milieu carcéral. Pour réaliser cet ... [more ▼]

En publiant la circulaire ministérielle du 4 octobre 2000, Marc Verwilghen, alors ministre de la Justice, décide d’introduire le concept de justice réparatrice en milieu carcéral. Pour réaliser cet ambitieux projet, il crée une nouvelle fonction – celle de consultant en justice réparatrice (CJR) – à qui il confie comme mission d’« orienter la culture de la détention vers une culture de la réparation », selon le texte de la circulaire. Ainsi, de 2000 à 2008, un CJR (consultant en justice réparatrice) a travaillé au sein de chaque établissement pénitentiaire belge. La présente contribution visera tout d’abord (2) à décrire le processus d’incarnation d’un dispositif d’action publique, c’est-à-dire le processus d’émergence de la fonction de CJR sur le terrain. Ensuite (3), nous tenterons de répertorier les pratiques qu’ont exercées, pendant près de huit ans, ces nouveaux acteurs du monde pénitentiaire. Nous analyserons (4) enfin quelles formes sociales concrètes les CJR ont conféré à leur métier. Pour ce faire, nous nous baserons sur un matériau empirique récolté au sein de quatre prisons pendant une période de trois ans. [less ▲]

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