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See detailControl of Bimanual Rhythmic Movements: Trading Efficiency for Robustness Depending on the Context
Ronsse, R.; Thonnard, J. L.; Lefevre Philippe et al

in Experimental Brain Research = Experimentelle Hirnforschung = Expérimentation Cérébrale (2008)

This paper investigates how the efficiency and robustness of a skilled rhythmic task compete against each other in the control of a bimanual movement. Human subjects juggled a puck in 2D through impacts ... [more ▼]

This paper investigates how the efficiency and robustness of a skilled rhythmic task compete against each other in the control of a bimanual movement. Human subjects juggled a puck in 2D through impacts with two metallic arms, requiring rhythmic bimanual actuation. The arms kinematics were only constrained by the position, velocity and time of impacts while the rest of the trajectory did not influence the movement of the puck. In order to expose the task robustness, we manipulated the task context in two distinct manners: the task tempo was assigned at four different values (hence manipulating the time available to plan and execute each impact movement individually); and vision was withdrawn during half of the trials (hence reducing the sensory inflows). We show that when the tempo was fast, the actuation was rhythmic (no pause in the trajectory) while at slow tempo, the actuation was discrete (with pause intervals between individual movements). Moreover, the withdrawal of visual information encouraged the rhythmic behavior at the four tested tempi. The discrete versus rhythmic behavior give different answers to the efficiency/robustness trade-off: discrete movements result in energy efficient movements, while rhythmic movements impact the puck with negative acceleration, a property preserving robustness. Moreover, we report that in all conditions the impact velocity of the arms was negatively correlated with the energy of the puck. This correlation tended to stabilize the task and was influenced by vision, revealing again different control strategies. In conclusion, this task involves different modes of control that balance efficiency and robustness, depending on the context. [less ▲]

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See detailPH-responsive biodegradable amphiphilic networks
Zednik, Jiri; Riva, Raphaël ULg; Lussis, Perrine ULg et al

in Polymer (2008), 49(3), 697-702

Copper-mediated azide - alkyne Huisgen's 1,3-dipolar cycloaddition is a "click" reaction that was successfully used to prepare pH-responsive, amphiphilic and biodegradable networks. Indeed, this reaction ... [more ▼]

Copper-mediated azide - alkyne Huisgen's 1,3-dipolar cycloaddition is a "click" reaction that was successfully used to prepare pH-responsive, amphiphilic and biodegradable networks. Indeed, this reaction proved to be very efficient in the "one pot" grafting of amino alkyne onto azide containing poly(epsilon-caprolactone) and the cross-linking of these chains by alpha,omega-dialkynyl poly(ethylene oxide). The pH-controlled release of guests hosted during the cross-linking step was illustrated with an entrapped model dye. [less ▲]

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See detailA mathematical modelling of bloom of the coccolithophore Emiliania huxleyi in a mesocosm experiment
Joassin, Pascal ULg; Delille, Bruno ULg; Soetaert, K. et al

in Biogeosciences Discussions (2008), 5

A dynamic model has been developed to represent biogeochemical variables and processes observed during a bloom of Emiliania huxleyi coccolithophore. This bloom was induced in a mesocosm experiment during ... [more ▼]

A dynamic model has been developed to represent biogeochemical variables and processes observed during a bloom of Emiliania huxleyi coccolithophore. This bloom was induced in a mesocosm experiment during which the ecosystem development was followed over a period of 23-days through changes in various biogeochemical parameters such as inorganic nutrients (nitrate, ammonium and phosphate), total alkalinity (TA), dissolved inorganic carbon (DIC), partial pressure of CO[SUB]2[/SUB] (pCO[SUB]2[/SUB]), dissolved oxygen (O[SUB]2[/SUB]), photosynthetic pigments, particulate organic carbon (POC), dissolved organic carbon (DOC), Transparent Exopolymer Particles (TEP), primary production, and calcification. This dynamic model is based on unbalanced algal growth and balanced bacterial growth. In order to adequately reproduce the observations, the model includes an explicit description of phosphorus cycling, calcification, TEP production and an enhanced mortality due to viral lysis. The model represented carbon, nitrogen and phosphorus fluxes observed in the mesocosms. Modelled profiles of algal biomass and final concentrations of DIC and nutrients are in agreement with the experimental observations. [less ▲]

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See detailL'astronomie dans le monde
Manfroid, Jean ULg

Article for general public (2008)

CoRoT : le point un an après son lancement; L1157; L'exoplanète HD 189733; Jets de HH211; Mars; Jet violent de 3C321; Cartographie de BO Microscopii; Mars en opposition;

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See detailIDIPS: ISP-Driven Informed Path Selection
Saucez, Damien; Donnet, Benoît ULg; Bonaventure, Olivier

Report (2008)

This draft describes a simple network-based protocol to facilitate Path Selection and to improve traffic engineering capabilities in multihomed corporate networks. With this protocol, any network device ... [more ▼]

This draft describes a simple network-based protocol to facilitate Path Selection and to improve traffic engineering capabilities in multihomed corporate networks. With this protocol, any network device that requires to select a path among a list of different paths asks a Traffic Engineering service called IDIPS (ISP-Driven Informed Path Selection) to obtain an ordered list of the possible paths. The ordering is constructed according to policies and performance requirements of both the host and network provider [less ▲]

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See detailThe Case for an Informed Path Selection Service
Bonaventure, Olivier; Saucez, Damien,; Donnet, Benoît ULg

Report (2008)

With today's peer-to-peer applications, more and more content is available from multiple sources. In tomorrow's Internet hosts will have multiple paths to reach one destination host with the deployment of ... [more ▼]

With today's peer-to-peer applications, more and more content is available from multiple sources. In tomorrow's Internet hosts will have multiple paths to reach one destination host with the deployment of dual-stack IPv4/IPv6 hosts, but also with new techniques such as shim6 or other locator/identifier mechanisms being discussed within the IRTF RRG. All these hosts will need to rank paths in order to select the best paths to reach a given destination/content. In this draft, we propose an informed path selection service that would be queried by hosts and would rank paths based on policies and performance metrics defined by the network operator to meet his traffic engineering objectives. A companion document describes a protocol that implements this service. [less ▲]

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See detailLabor, c'est confirmé
Habrand, Tanguy ULg

Article for general public (2008)

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See detailDavid Giannoni, éditeur
Habrand, Tanguy ULg

Article for general public (2008)

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See detailEmerging Roles of ADAM and ADAMTS Metalloproteinases in Cancer
Rocks, Natacha ULg; Paulissen, Geneviève ULg; El Hour, Mehdi ULg et al

in Biochimie (2008), 90(2), 369-79

A disintegrin and metalloproteinases (ADAMs) are a recently discovered family of proteins that share the metalloproteinase domain with matrix metalloproteinases (MMPs). Among this family, structural ... [more ▼]

A disintegrin and metalloproteinases (ADAMs) are a recently discovered family of proteins that share the metalloproteinase domain with matrix metalloproteinases (MMPs). Among this family, structural features distinguish the membrane-anchored ADAMs and the secreted ADAMs with thrombospondin motifs referred to as ADAMTSs. By acting on a large panel of membrane-associated and extracellular substrates, they control several cell functions such as adhesion, fusion, migration and proliferation. The current review addresses the contribution of these proteinases in the positive and negative regulation of cancer progression as mainly mediated by the regulation of growth factor activities and integrin functions. [less ▲]

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See detailLes effets de l’anxiété sur l’excitation sexuelle féminine
Kempeneers, Philippe ULg; Barbier, Valérie

in Réalités en Gynécologie-Obstétrique (2008), 128(2), 25-29

L’excitation sexuelle est une réaction psychophysiologique complexe qui nécessite l’interprétation convergente de stimuli internes et externes. L’anxiété peut exercer des effets tantôt facilitateurs ... [more ▼]

L’excitation sexuelle est une réaction psychophysiologique complexe qui nécessite l’interprétation convergente de stimuli internes et externes. L’anxiété peut exercer des effets tantôt facilitateurs, tantôt inhibiteurs sur ce processus. Dans le premier cas, l’anxiété déclenche une réaction émotionnelle neurovégétative que l’organisme associe à une stimulation érotique concomitante. La réaction sexuelle s’en trouve favorisée : c’est l’effet d’amorce. Cet effet est couramment observé en laboratoire. On pense qu’il est à l’œuvre aussi dans certaines formes de sexualités compulsives ou, plus simplement, chez ces nombreuses femmes qui se disent parfois sexuellement émoustillées par le stress. Dans le second cas, les préoccupations anxieuses mobilisent une telle quantité d’attention qu’elles empiètent sur les ressources cognitives indispensables au traitement des stimuli érotiques. La réaction sexuelle s’en trouve entravée : c’est l’effet d’interférence. Certaines femmes sont plus vulnérables que d’autres à l’effet d’interférence, ce sont généralement des personnes dites érotophobes. Elles se caractérisent par une propension à diriger leur attention vers des schémas de danger lorsqu’elles sont en situation sexuelle et par un risque accru de dysfonctions sexuelles [less ▲]

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See detailCarninome intracanalaire (in situ) du sein : pouvons-nous raisonnablement éviter la radiothérapie pour certaines patientes opérées ?
Coucke, Philippe ULg; Barthelemy, Nicole ULg; Jansen, Nicolas ULg et al

in Revue Médicale de Liège (2008), 63(2), 75-81

Dans le cadre de la prise en charge multidisciplinaire du carcinome intracanalaire du sein (carcinome intra-canalaire in situ = DCIS = Ductal Carcinoma In Situ), on évoque souvent la possibilité de ... [more ▼]

Dans le cadre de la prise en charge multidisciplinaire du carcinome intracanalaire du sein (carcinome intra-canalaire in situ = DCIS = Ductal Carcinoma In Situ), on évoque souvent la possibilité de renoncer à la radiothérapie complémentaire après un geste de chirurgie conservatrice. S’il est vrai que la radiothérapie, dans ce contexte, n’apporte pas de bénéfice en survie, il n’en reste pas moins qu’on observe à long terme un effet bénéfique en contrôle local. Il existe un effet significativement marqué sur le taux de rechute de type DCIS et de type invasif dans les différentes études randomisées destinées à éclaircir la problématique du rôle de la radiothérapie. La question est de savoir si on peut distinguer un sous-groupe de patientes pour qui le contrôle local n’est pas modifié par l’adjonction d’une radiothérapie adjuvante. Pour l’instant, nous ne sommes pas à même de définir ce sous-groupe, car les critères de sélection n’ont pas été mis à l’épreuve dans le cadre d’un essai randomisé. Faute de ces données, il nous semble plus adéquat de proposer jusqu’à preuve du contraire, une radiothérapie aux patientes opérées, même si l’intervention est a priori radicale, mais conservatrice, et même si les facteurs pronostiques semblent plutôt favorables. Cependant, la radiothérapie n’est pas indiquée après une mastectomie. [less ▲]

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See detailRoutine Fetal Rhd Genotyping with Maternal Plasma: A Four-Year Experience in Belgium
Minon, J. M.; Gerard, Christiane ULg; Senterre, J. M. et al

in Transfusion (2008), 48(2), 373-81

BACKGROUND: The objective was to evaluate the diagnostic value of RHD fetal genotyping from the plasma of D- mothers as soon as 10 weeks' gestation in a routine clinical practice in Belgium. STUDY DESIGN ... [more ▼]

BACKGROUND: The objective was to evaluate the diagnostic value of RHD fetal genotyping from the plasma of D- mothers as soon as 10 weeks' gestation in a routine clinical practice in Belgium. STUDY DESIGN AND METHODS: A prospective study was conducted between November 2002 and December 2006. DNA extraction was performed in an automated closed tube system. Fetal RHD/SRY genotypes were detected in the plasma of 563 pregnant mothers by real-time polymerase chain reaction (PCR) targeting multiple exons 4, 5, and 10 of the RHD gene and targeting an SRY gene sequence. These were compared to the D phenotypes determined in the 581 babies they delivered. RESULTS: By combining amplification of three exons, the concordance rate of fetal RHD genotypes in maternal plasma and newborn D phenotypes at delivery was 100 percent (99.8% including one unusual false-positive). The presence of nonfunctional RHD genes and the absence of a universal fetal marker, irrespective of fetal sex, did not influence the accuracy of fetal RhD status prediction. The RHD genotyping from 18 twin pregnancies was also assessed. Five weak D women were excluded from the RHD fetal genotyping prediction. Three discrepant results (0.5%) between predicted fetal genotype and cord blood phenotype were not confirmed by the baby phenotypes from venipuncture blood. CONCLUSION: Prenatal prediction of fetal RHD by targeting multiple exons from the maternal plasma with real-time PCR is highly sensitive and accurate. Over 4 years, this experience has highly modified our management of D- pregnant women. [less ▲]

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See detailPrincipes des télécommunications analogiques et numériques
Van Droogenbroeck, Marc ULg

Learning material (2008)

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See detailAssessment of visual pursuit in post-comatose states: use a mirror
Vanhaudenhuyse, Audrey ULg; Schnakers, Caroline ULg; Brédart, Serge ULg et al

in Journal of Neurology, Neurosurgery & Psychiatry (2008), 79(2),

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See detailBelgische debatten voor een migratiebeleid. De actoren in kaart gebracht
Stockmans, Pieter; Perrin, Nathalie ULg

Book published by Koning Boudewijnstichting (2008)

Die publicatie geeft een overzicht van de belangrijkste actoren die een migratiebeleid mee vormgeven. ‘De actoren in kaart gebracht’ gaat in op de recente standpunten van die al actoren. Wat is ... [more ▼]

Die publicatie geeft een overzicht van de belangrijkste actoren die een migratiebeleid mee vormgeven. ‘De actoren in kaart gebracht’ gaat in op de recente standpunten van die al actoren. Wat is bijvoorbeeld het standpunt van het ABVV over regularisatie? Hoe denkt het VBO over nieuwe economische migratie. Wat zegt de Vrouwenraad over opvang van nieuwkomers? [less ▲]

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See detailTPICE British Aggregates Association contre Commission
Petit, Nicolas ULg

in Revue d'Etudes Juridiques Aménagement, Environnement, Urbanisme et Droit Foncier (2008)

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