References of "2012"
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See detailSpécificités de la proprioception de l’épaule
Forthomme, Bénédicte ULg; Kaux, Jean-François ULg; Crielaard, Jean-Michel ULg et al

in Julia, M.; Hirt, D.; Perrey, S. (Eds.) et al La proprioception (2012)

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See detailQuel est l’impact de l’interculturel sur les échanges virtuels en entreprise ?
Cusumano, Christophe ULg

Conference (2012, March)

Since the end of the eighties, the globalization and development of new information and communication technologies have played a great part in complicating exchanges between companies and their various ... [more ▼]

Since the end of the eighties, the globalization and development of new information and communication technologies have played a great part in complicating exchanges between companies and their various stakeholders (staff, customers/users and business partners). New forms of organization of work result in more and more relationships between people of different nationalities and cultures. Thanks to virtuality, a lot of companies can develop connections with people from various cultural backgrounds which can be co-located or distributed (with partners situated abroad, including in different time zones). But to maximize this potential, organization must overcome different complexifications levels of virtual communication and multicultural. So, we suggest studying the impact of cultural diversity on the quality and efficiency of virtual communications. There are already many studies about the impact of diversity on non-virtual context but very little about the impact of diversity on virtual exchanges. The originality of this article is to focus on the influence of intercultural and virtuality. [less ▲]

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See detailA mixed solid-shell element for the analysis of laminated composites
Rah, Kamran; Paepegem, Wim; Habraken, Anne ULg et al

in International Journal for numerical methods in engineering (2012), 89(7), 805-828

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See detailArt public : entre pratiques sauvages et commandes officielles
Hagelstein, Maud ULg

in Cahiers nouveaux - Trimestriel du Développement territorial (2012), 81

L’expression «art public» désigne l’ensemble des oeuvres d’art qui ont été commandées, planifiées et exécutées en vue d’être placées dans un espace public. Partant de cette définition sommaire, on ... [more ▼]

L’expression «art public» désigne l’ensemble des oeuvres d’art qui ont été commandées, planifiées et exécutées en vue d’être placées dans un espace public. Partant de cette définition sommaire, on pourrait être tenté d’établir une différence entre un art public de commande et un art public plus sauvage : d’un côté, une instance publique souhaite qu’un artiste produise une oeuvre reflétant l’état d’esprit d’un environnement urbain donné et de ses habitants ; de l’autre, les artistes font des percées intempestives dans le paysage visuel de la ville – et ce, sans qu’on leur ait rien demandé. Cette distinction servirait une stratégie sans doute grossière visant à séparer au sein de l’espace public art de convenance et art subversif. Là où les uns essaieraient de rencontrer les goûts normés du citoyen moyen, les autres prendraient au contraire le risque de la désapprobation en déstabilisant les codes en vigueur et les normes esthétiques. Mais cette opposition entre art de convenance et art subversif constitue probablement un cliché grotesque. Aussi adoptera-t-on un point de vue plus fécond en montrant plutôt les contiguïtés entre l’art de commande et de l’art sauvage. Dans un cas comme dans l’autre, dès que les oeuvres d’art sont publiques, elles posent des problèmes spécifiques. Quels que soient les objectifs qui l’animent, dès qu’il franchit les murs de l’institution, du musée ou de la galerie, l’artiste prend un risque considérable. Et au fond, que sa proposition artistique soit autorisée ou illégale, d’un certain point de vue, le risque demeure. C’est ce qu’il s’agira ici d’identifier. [less ▲]

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See detailExperimental identification of a nonlinear space structure
Noël, Jean-Philippe ULg; Renson, Ludovic ULg; Kerschen, Gaëtan ULg et al

in Proceedings of the 12th European Conference on Spacecraft Structures, Materials and Environmental Testing (2012, March)

The present paper addresses the experimental identification of a nonlinear space structure, the SmallSat spacecraft developed by EADS-Astrium. The nonlinear component comprises an inertia wheel mounted on ... [more ▼]

The present paper addresses the experimental identification of a nonlinear space structure, the SmallSat spacecraft developed by EADS-Astrium. The nonlinear component comprises an inertia wheel mounted on a support, the motion of which is constrained by eight elastomer plots and mechanical stops. Robust techniques are applied to measured data to detect, characterise and quantify nonlinear behaviour. [less ▲]

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See detailFrom field to laboratory studies: case of selenium in Chelonians
Dyc, Christelle ULg; Thomé, Jean-Pierre ULg; Das, Krishna ULg

in Proceedings of the 32nd Annual Symposium on Sea Turtle Biology and Conservation (2012, March)

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See detailTi alloys processed by selective laser melting and by laser cladding: microstructures and mechanical properties
Mertens, Anne ULg; Contrepois, Quentin ULg; Dormal, Thierry ULg et al

in proceedings of 12th EUROPEAN CONFERENCE ON SPACECRAFT STRUCTURES, MATERIALS & ENVIRONMENTAL TESTING, Noordwijk 20-23 mars 2012 (2012, March)

Selective laser melting (SLM) and laser cladding were developed in the late 1990s as economic layer-by-layer near-net-shape processes allowing for the production – and also, in the case of laser cladding ... [more ▼]

Selective laser melting (SLM) and laser cladding were developed in the late 1990s as economic layer-by-layer near-net-shape processes allowing for the production – and also, in the case of laser cladding, the restoration - of complex parts. Both techniques involve the melting of a metallic powder with a laser. In the case of SLM, the metallic powder is deposited layer by layer and then molten locally according to the desired shape, whereas in laser cladding the metallic powder is projected onto a substrate through a tube coaxial with the laser. In both processes, the metallic melt pools then cool down and solidify very rapidly, thus producing strongly out of equilibrium microstructures that might exhibit high internal stresses. In the present work, efforts have been made to enhance the flexibility of the laser cladding process: a second laser with a maximum power of 300W was installed beside the original laser (with a higher maximum power of 2000W), thus allowing for the processing of parts with thinner walls and/or coatings. Moreover, flexibility was also improved in relation with the geometry of the parts by use of a 5-axes displacement control. Samples of alloy Ti-6Al-4V, that is widely used in the aeronautic industry due to its high specific strength, have been processed both by SLM and by laser cladding. The resulting microstructures have been characterised in details by optical microscopy, SEM and EBSD so as to allow for a better understanding of the solidification process and of the subsequent phase transformations taking place upon cooling for both techniques. The influence of processing parameters such as the orientation of the deposition of the successive powder layers on the mechanical properties was also investigated by means of uniaxial tensile testing performed on samples with different deposition orientations in regard to the direction of mechanical solicitation. Moreover, some of the samples for mechanical testing had undergone an annealing treatment at 640°C for 4 hours to relieve internal stresses, in order to assess more precisely the effect of those stresses on the tensile properties. [less ▲]

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See detailProtocol 3 : Belgian innovative projetcs to help community dwelling frail elderly
de Almeida Mello, J; Maggi, Patrick ULg; Van Durme, T et al

Poster (2012, March)

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See detailA Hybrid IP Lookup Architecture with Fast Updates
Luo, Layong; Xie, Gaogang; Xie, Yingke et al

in Annual International Conference on Computer Communications (2012, March)

As network link rates are being pushed beyond 40 Gbps, IP lookup in high-speed routers is moving to hardware. The TCAM (Ternary Content Addressable Memory)-based IP lookup engine and the SRAM (Static ... [more ▼]

As network link rates are being pushed beyond 40 Gbps, IP lookup in high-speed routers is moving to hardware. The TCAM (Ternary Content Addressable Memory)-based IP lookup engine and the SRAM (Static Random Access Memory)- based IP lookup pipeline are the two most common ways to achieve high throughput. However, route updates in both engines degrade lookup performance and may lead to packet drops. Moreover, there is a growing interest in virtual IP routers where more frequent updates happen. Finding solutions that achieve both fast lookup and low update overhead becomes critical. In this paper, we propose a hybrid IP lookup architecture to address this challenge. The architecture is based on an efficient trie partitioning scheme that divides the Forwarding Information Base (FIB) into two prefix sets: a large disjoint leaf prefix set mapped into an external TCAM-based lookup engine and a small overlapping prefix set mapped into an on-chip SRAM-based lookup pipeline. Critical optimizations are developed on both IP lookup engines to reduce the update overhead. We show how to extend the proposed hybrid architecture to support virtual routers. Our implementation shows a throughput of 250 million lookups per second (MLPS). The update overhead is significantly lower than that of previous work and the utilization ratio of most external TCAMs is up to 100%. [less ▲]

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See detailUn pôle d'excellence wallon en santé articulaire.
Henrotin, Yves ULg

Article for general public (2012)

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See detailG protein-coupled receptors, an unexploited animal toxin targets: Exploration of green mamba venom for novel drug candidates active against adrenoceptors
Maïga, Arhamatoulaye; Mourier, Gilles; Quinton, Loïc ULg et al

in Toxicon (2012), 59

At a time when pharmaceutical companies are having trouble finding new low MW drugs and when biologics are becoming more common, animal venoms could constitute an underexploited source of novel drug ... [more ▼]

At a time when pharmaceutical companies are having trouble finding new low MW drugs and when biologics are becoming more common, animal venoms could constitute an underexploited source of novel drug candidates. We looked for identifying novel animal toxins active against G protein-coupled receptors (GPCR), the most frequently exploited class of treatment targets, with the aim to develop novel research tools and drug candidates. Screening of green mamba (Dendroaspis angusticeps) venom against adrenoceptors identified two novel venom peptides. r-Da1a shown an affinity of 0.35 nM for the a1a-AR while r-Da1b displayed affinities between 14 and 73 nM for the three a2-ARs. These two venom peptides have sequences similar to those of muscarinic toxins and belong to the three-finger-fold protein family. a1a-AR is the primary target for the treatment of prostate hypertrophy. In vitro and in vivo tests demonstrated that r-Da1a reduced prostatic muscle tone as efficiently as tamsulosin (an antagonist presently used), but with fewer cardiovascular side effects. a2-ARs are the prototype of GPCRs not currently used as treatment targets due to a lack of specific ligands. Blockage of these receptors increases intestinal motility, which may be compromised by abdominal surgery and reduces orthosteric hypotension. In vitro and in vivo tests demonstrated that r-Da1b antagonizes a2-ARs in smooth muscles and increased heart rate and blood catecholamine concentrations. These results highlight possible exploitation of r-Da1a and r-Da1b in important pathologies. [less ▲]

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See detailLes innombrables formes des Mille et une Nuits : quelques éditions, traditions, traductions... et trahisons
Franssen, Elise ULg

in La lettre du Réseau. Une Publication du Réseau des médiévistes belges de langue française (RMBLF) (2012), 2

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See detailVieillir, mais pas tout seul. Une enquête sur la solitude et l'isolement social des personnes âgées en Belgique
Vandenbroucke, S; Lebrun, JM; Vermeulen, B et al

Report (2012)

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See detailA preliminary look at the empirical mass distribution of hot B subdwarf stars
Fontaine, Gilles; Brassard, Pierre; Charpinet, Stéphane et al

in Astronomy and Astrophysics (2012), 539

We present the results of about a decade of efforts toward building an empirical mass distribution for hot B subdwarf stars on the basis of asteroseismology. So far, our group has published detailed ... [more ▼]

We present the results of about a decade of efforts toward building an empirical mass distribution for hot B subdwarf stars on the basis of asteroseismology. So far, our group has published detailed analyses pertaining to 16 pulsating B subdwarfs, including estimates of the masses of these pulsators. Given that measurements of the masses of B subdwarfs through more classical methods (such as full orbital solutions in binary stars) have remained far and few, asteroseismology has proven a tool of choice in this endeavor. On the basis of a first sample of 15 pulsators, we find a relatively sharp mass distribution with a mean mass of 0.470 M⊙, a median value of 0.470 M⊙, and a narrow range 0.441−0.499 M⊙ containing some 68.3% of the stars. We augmented our sample with the addition of seven stars (components of eclipsing binaries) with masses reliably established through light curve modeling and spectroscopy. The new distribution is very similar to the former one with a mean mass of 0.470 M⊙, a median value of 0.471 M⊙, and a slightly wider range 0.439−0.501 M⊙ containing some 68.3% of the stars. Although still based on small-number statistics, our derived empirical mass distribution compares qualitatively very well with the expectations of stellar evolution theory. [less ▲]

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See detailDexamethasone pretreatment provides antiinflammatory and myocardial protection in neonatal arterial switch operation.
Heying, Ruth; Wehage, Edith; SCHUMACHER, Katharina ULg et al

in Annals of Thoracic Surgery (2012), 93(3), 869-76

BACKGROUND: This prospective double-blinded randomized study tested the hypothesis that preoperative treatment with dexamethasone would attenuate inflammatory priming of the myocardium, reduce the ... [more ▼]

BACKGROUND: This prospective double-blinded randomized study tested the hypothesis that preoperative treatment with dexamethasone would attenuate inflammatory priming of the myocardium, reduce the systemic inflammatory reaction upon cardiac operation, and provide organ protection in neonates. METHODS: Twenty neonates (age, 8 to 21 days) with transposition of the great arteries scheduled for arterial switch operation were included. Nine received dexamethasone (1 mg/kg body weight) 4 hours before cardiopulmonary bypass, and 11 received natrium chloride. We studied intramyocardial messenger RNA expression of interleukin (IL)-6, IL-8, IL-1beta, and tumor necrosis factor-alpha (TNF-alpha), as well as IL-10 and expression of TNF-alpha on protein level in right atrial tissue taken before institution of CPB. We measured plasma levels of IL-6, IL-10, lipopolysaccharide binding protein, and cardiac troponin T. Cytokine expression was related to postoperative outcome. RESULTS: Pretreatment with dexamethasone led to a significant decrease in myocardial expression of IL-6, IL-8, IL-1beta, and TNF-alpha messenger RNA and to a decrease in protein synthesis of TNF-alpha. Plasma concentrations of IL-6 were significantly lower and those of IL-10 significantly higher in pretreated patients. This was associated with lower cardiac troponin T values and lower dobutamine requirement. Levels of lipopolysaccharide binding protein were significantly higher postoperatively in pretreated neonates. CONCLUSIONS: Dexamethasone administration before arterial switch operation leads to a shift in the myocardial and systemic cytokine expression profile in neonates with transposition of the great arteries, with downregulation of proinflammatory and upregulation of antiinflammatory cytokines. Lower myocardial cell damage and lower catecholamine requirement suggest myocardial protection in treated patients. [less ▲]

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