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See detailImportance of pigtailed macaques (Macaca nemestrina leonina) in seed dispersal and impact on the ecological balance of the tropical rainforest at Khao Yai National Park, Thailand
Albert, Aurélie ULg; Huynen, Marie-Claude ULg

Poster (2009, February)

The tropical rain forest is maintained thanks to a precarious balance placed under the yoke of interactions between the various animal and plant species which compose it. Among them we can find those ... [more ▼]

The tropical rain forest is maintained thanks to a precarious balance placed under the yoke of interactions between the various animal and plant species which compose it. Among them we can find those implying plants and frugivores. Although its diet is largely frugivorous, the pigtailed macaques (Macaca nemestrina leonina) have often been categorized as seed predators. However their morphology, behaviour and ecology suggest they could actually be a key-species in the dispersion of many plant species. A preliminary study by Latinne & al (2007) supported this hypothesis. The study we are planning now in continuity of Latinne’s study will take place in the Khao Yai National Park, Thailand, for three years and will focus on a troop habituated to humans. In order to establish the importance of the pigtailed macaques in the maintenance and the regeneration of the tropical rain forest, we will try to evaluate their capacity of being good seed dispersers. To do so, we will study: 1) the spatiotemporal distribution, the productivity and the characteristics of the plant species present on the home range of the studied troop, 2) the ranging patterns of the macaques within their home range, 3) their feeding behaviour, notably the fruit selection and the various modes of processing seeds, and finally 4) their impact on the viability and the germination potential of seeds. This study will require both direct observations of the macaques and semi-experimental procedures in the field, as well as laboratory control of some seed parameters. We hope the clarification of the macaques’ seed dispersal behaviour would help to re-evaluate their conservation status by recognizing them a paramount role in the maintenance of the tropical rainforest. [less ▲]

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See detailLe cas clinique du mois. Transplantation hépatique pour un hémangio-endothéliome épithélioïde du foie
Tonglet, M.; Delfosse, V.; Detry, Olivier ULg et al

in Revue Médicale de Liège (2009), 64(2), 68-70

L’hémangioendothéliome épithélioïde est une affection maligne rare qui peut survenir dans le foie. Lorsque la forme est multifocale et bilobaire, la transplantation hépatique constitue le traitement ... [more ▼]

L’hémangioendothéliome épithélioïde est une affection maligne rare qui peut survenir dans le foie. Lorsque la forme est multifocale et bilobaire, la transplantation hépatique constitue le traitement curateur de cette affection. Dans cet article, les auteurs décrivent le diagnostic et le traitement d’une femme de 52 ans souffrant d’un hémangioendothéliome épithélioïde hépatique traitée par transplantation du foie. [less ▲]

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See detailDashboard aimed at decision-makers and citizens in place managmenent, within SD principles
De Graef, Sarai; Dalimier, Isabelle; Ericx, Michel et al

Report (2009)

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See detailLe cahier de santé de votre enfant
Battisti, Oreste ULg

Learning material (2009)

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See detailA multiwavelength investigation of the massive eclipsing binary Cyg OB2 #5
Linder, Natacha ULg; Rauw, Grégor ULg; Manfroid, Jean ULg et al

in Astronomy and Astrophysics (2009), 495

Context. The properties of the early-type binary Cyg OB2 #5 have been debated for many years and spectroscopic and photometric investigations yielded conflicting results. Aims. We have attempted to ... [more ▼]

Context. The properties of the early-type binary Cyg OB2 #5 have been debated for many years and spectroscopic and photometric investigations yielded conflicting results. Aims. We have attempted to constrain the physical properties of the binary by collecting new optical and X-ray observations. Methods. The optical light curves obtained with narrow-band continuum and line-bearing filters are analysed and compared. Optical spectra are used to map the location of the He II $\lambda $ 4686 and H$\alpha $ line-emission regions in velocity space. New XMM-Newton as well as archive X-ray spectra are analysed to search for variability and constrain the properties of the hot plasma in this system. Results. We find that the orbital period of the system slowly changes though we are unable to discriminate between several possible explanations of this trend. The best fit solution of the continuum light curve reveals a contact configuration with the secondary star being significantly brighter and hotter on its leading side facing the primary. The mean temperature of the secondary star turns out to be only slightly lower than that of the primary, whilst the bolometric luminosity ratio is found to be 3.1. The solution of the light curve yields a distance of $925 \pm 25$ pc much lower than the usually assumed distance of the Cyg OB2 association. Whilst we confirm the existence of episodes of higher X-ray fluxes, the data reveal no phase-locked modulation with the 6.6 day period of the eclipsing binary nor any clear relation between the X-ray flux and the 6.7 yr radio cycle. Conclusions. The bright region of the secondary star is probably heated by energy transfer in a common envelope in this contact binary system as well as by the collision with the primary's wind. The existence of a common photosphere probably also explains the odd mass-luminosity relation of the stars in this system. Most of the X-ray, non-thermal radio, and possibly $\gamma$-ray emission of Cyg OB2 #5 is likely to arise from the interaction of the combined wind of the eclipsing binary with at least one additional star of this multiple system. [less ▲]

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See detailPrise en charge de l'insuffisance rénale chronique à l’occasion de la journée Mondiale du rein Jeudi 13 mars 2008
Krzesinski, Jean-Marie ULg

in Revue Médicale de Liège (2009), 64(2), 71-72

Chronic kidney disease is a worldwide growing problem, especially due to three factors very often encountered together (old age, diabetes mellitus and arterial hypertension). A multidisciplinary approach ... [more ▼]

Chronic kidney disease is a worldwide growing problem, especially due to three factors very often encountered together (old age, diabetes mellitus and arterial hypertension). A multidisciplinary approach is needed to reduce this epidemic that has important health implications.This needs of course well trained health partners. On the occasion of the world kidney day on March 2008, four lectures were given, which gave an updated overview of the management of chronic kidney insufficiency, a serious problem of public health. [less ▲]

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See detailPluridisciplinarité, continuité et qualité des soins en 1ère ligne : quelles attentes des professionnels ?
Vanmeerbeek, Marc ULg; Duchesnes, Christiane ULg; Massart, Valérie ULg et al

Report (2009)

Le GLS souhaite établir son plan d’action pour les années à venir à la lumière de l’opinion des professionnels des soins à domicile. La présente étude du Département de Médecine Générale de l’Université ... [more ▼]

Le GLS souhaite établir son plan d’action pour les années à venir à la lumière de l’opinion des professionnels des soins à domicile. La présente étude du Département de Médecine Générale de l’Université de Liège a permis de donner la parole à une centaine d’acteurs de la première ligne, répartis au sein de six professions différentes. Les deux outils de recueils de données que sont les Groupes focalisés et les Groupes nominaux donnent logiquement des informations de natures différentes. Les usages concrets qui peuvent en être faits sont également différents. Il existe naturellement de très larges superpositions qui font que les discours entendus sont cohérents. Les FG ont exploré de manière très détaillée les ressentis, les représentations et les attentes individuels de professionnels des soins à domicile vis-à-vis des missions attribuées aux Services Intégrés de Soins à Domicile. Globalement, c’est l’état d’esprit des professionnels qui a été visité dans les deux domaines importants que sont la qualité des soins et le travail collaboratif. Il en ressort de grandes tendances qu’il peut être utile d’identifier pour une structure comme le GLS. Les réalités des soins à domicile sont analysées de manière assez homogène ; la complexité médicosociale de certaines situations est évidente aux yeux de tous et la plus-value apportée par l’action pluridisciplinaire dans de telles circonstances est spontanément évoquée par tous. Les différentes disciplines tiennent un discours assez unanime sur la nécessité de centrer son attention sur le patient qui doit devenir un acteur de ses propres soins. Un changement de modèle qui fait passer le patient d’une situation passive à une position active est en train de s’opérer. La culture pluridisciplinaire fait son chemin, elle progresse malgré des obstacles bien reconnus par les prestataires des différentes disciplines. En définitive, la prise en charge de soins à domicile suscite un riche questionnement éthique où se mêlent des interrogations sur la place du patient, sur la pluridisciplinarité et le partage des informations professionnelles, sur la gestion des situations complexes, sur le développement professionnel et personnel des soignants, sur la place des soins à domicile dans notre système de santé. La contribution des SISD peut être importante dans ces vastes domaines de réflexion : on peut penser à des colloques, des formations, des rencontres pluridisciplinaires,… Plus spécifiquement, les FG ont permis d’identifier des préoccupations plus particulières qui interpellent toutes les disciplines et qui pourraient déboucher sur des actions concrètes. On peut ainsi épingler, dans le désordre, le besoin de soutien au bien-être des soignants, la demande de programmes de formation pluridisciplinaire, le souhait implicite d’outils novateurs en matière d’échanges d’informations, l’intérêt exprimé pour toute initiative locale favorisant les contacts pluridisciplinaires et la connaissance des autres disciplines. Le discours des soignants permet également de relever des carences qui ne sont pas spontanément exprimées : méconnaissance des dispositifs sociaux améliorant l’accessibilité aux soins et leur coût, de la législation relative à la concertation multidisciplinaire, du rôle des centres de coordination et des coordinatrices de soins. Ici encore des actions d’information peuvent être initiées ou poursuivies. Les GN nous apportent un éclairage plus concret sur les actions qui peuvent être menées pour favoriser le développement du travail collaboratif et améliorer l’action pluridisciplinaire. En outre, cette méthode permet une hiérarchisation des propositions tout en autorisant que soient révélées des sensibilités propres à chaque discipline. De grands domaines d’actions prioritaires, identifiés par toutes les disciplines, peuvent se dégager : les rencontres entre professionnels, les moyens de communication interdisciplinaires et l’organisation concrète de l’action pluridisciplinaire locale. Les indices de priorité et de popularité permettent d’approcher, pour chaque action envisageable, l’importance que les professionnels lui accordent ainsi que le nombre de ceux qui pourraient être intéressés. Au départ des grandes catégories ou sous-catégories d’actions, la méthode des GN a l’avantage de permettre de retourner aux propositions précises, telles qu’exprimées et validées par les professionnels. [less ▲]

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See detailLa prise en charge de l'insuffisance rénale chronique avant la dialyse
Smelten, Nicole; Krzesinski, Jean-Marie ULg

in Revue Médicale de Liège (2009), 64(2), 79-85

Chronic renal failure is usually a silent disease until its late stage, especially in elderly people. Screening for such disease is particularly useful in hypertensive diabetic patients above 50 years ... [more ▼]

Chronic renal failure is usually a silent disease until its late stage, especially in elderly people. Screening for such disease is particularly useful in hypertensive diabetic patients above 50 years. The causes are indeed often vascular or metabolic (directly or not directly linked to diabetes mellitus). Other less frequent causes are yet possible. The search for the right diagnosis of renal insufficiency is always requested to apply the appropriate treatment, combined with medical measures for secondary and tertiary prevention. This review will give general advices to avoid the development of renal disease (stages 3 and 4) or its progression, and also insist on the potential nephrotoxic effects of some drugs. [less ▲]

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See detailAutonomous rigid body attitude synchronization
Sarlette, Alain ULg; Sepulchre, Rodolphe ULg; Leonard, Naomi

in Automatica (2009), 45(2), 572-577

Control laws to synchronize attitudes in a swarm of fully actuated rigid bodies, in the absence of a common reference attitude or hierarchy in the swarm, are proposed in [Smith, T. R., Hanssmann, H ... [more ▼]

Control laws to synchronize attitudes in a swarm of fully actuated rigid bodies, in the absence of a common reference attitude or hierarchy in the swarm, are proposed in [Smith, T. R., Hanssmann, H., & Leonard, N.E. (2001). "Orientation control of multiple underwater vehicles with symmetry-breaking potentials". In Proc. 40th IEEE conf. decision and control (pp. 4598–4603); Nair, S., Leonard, N. E. (2007). "Stable synchronization of rigid body networks". In Networks and Heterogeneous Media, 2(4), 595–624]. The present paper studies two separate extensions with the same energy shaping approach: (i) locally synchronizing the rigid bodies’ attitudes, but without restricting their final motion and (ii) relaxing the communication topology from undirected, fixed and connected to directed, varying and uniformly connected. The specific strategies that must be developed for these extensions illustrate the limitations of attitude control with reduced information. [less ▲]

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See detailL’étude ACCOMPLISH : remise en question des choix médicamenteux chez les patients hypertendus systoliques à haut risque cardio-vasculaire
Krzesinski, Jean-Marie ULg; Scheen, André ULg

in Revue Médicale de Liège (2009), 64(2), 103-108

Arterial hypertension is an important cardiovascular risk factor. The benefit drawn from decreasing and normalizing the blood pressure level is indisputable. The ACCOMPLISH study performed in patients ... [more ▼]

Arterial hypertension is an important cardiovascular risk factor. The benefit drawn from decreasing and normalizing the blood pressure level is indisputable. The ACCOMPLISH study performed in patients older than 65 with systolic hypertension and a high cardiovascular risk pointed out the interest of well choosing the antihypertensive combination to reduce this risk beyond the decrease of blood pressure. The association of benazepril (an angiotensin converting enzyme inhibitor or ACEI) and amlodipine (a calcium antagonist) has shown significant early cardiovascular protection in such patients as compared to the classic association including the same ACEI and hydrochlorothiazide, in spite of the same target blood pressure reached. This important finding does not contest the interest of a well controlled blood pressure in hypertension, but probably will modify our first antihypertensive combination choice in the future in patients with such cardiovascular profile. [less ▲]

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See detailFast Multi-Class Image Annotation with Random Subwindows and Multiple Output Randomized Trees
Dumont, Marie; Marée, Raphaël ULg; Wehenkel, Louis ULg et al

in Proc. International Conference on Computer Vision Theory and Applications (VISAPP) (2009, February)

This paper addresses image annotation, i.e. labelling pixels of an image with a class among a finite set of predefined classes. We propose a new method which extracts a sample of subwindows from a set of ... [more ▼]

This paper addresses image annotation, i.e. labelling pixels of an image with a class among a finite set of predefined classes. We propose a new method which extracts a sample of subwindows from a set of annotated images in order to train a subwindow annotation model by using the extremely randomized trees ensemble method appropriately extended to handle high-dimensional output spaces. The annotation of a pixel of an unseen image is done by aggregating the annotations of its subwindows containing this pixel. The proposed method is compared to a more basic approach predicting the class of a pixel from a single window centered on that pixel and to other state-of-the-art image annotation methods. In terms of accuracy, the proposed method significantly outperforms the basic method and shows good performances with respect to the state-of-the-art, while being more generic, conceptually simpler, and of higher computational efficiency than these latter. [less ▲]

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See detailOscillatority of Nonlinear Systems with Static Feedback
Efimov, Denis ULg; Fradkov, Alexander

in SIAM Journal on Control & Optimization (2009), 48(2), 618-640

New Lyapunov-like conditions for oscillatority of dynamical systems in the sense of Yakubovich are proposed. Unlike previous results these conditions are applicable to nonlinear systems and allow for ... [more ▼]

New Lyapunov-like conditions for oscillatority of dynamical systems in the sense of Yakubovich are proposed. Unlike previous results these conditions are applicable to nonlinear systems and allow for consideration of nonperiodic, e.g., chaotic modes. Upper and lower bounds for oscillations amplitude are obtained. The relation between the oscillatority bounds and excitability indices for the systems with the input are established. Control design procedure providing nonlinear systems with oscillatority property is proposed. Examples illustrating proposed results for Van der Pol system, Lorenz system, and Hindmarsh–Rose neuron model as well as computer simulation results are given. [less ▲]

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See detailPALETTE: Learning and Organisational Resources: Conceptual Instruments for Self- Analysis, Learning and Developments of CoPs
Ashwin, Paul; Daele, Amaury; Barlatier, Pierre-Jean et al

Report (2009)

The purpose of this deliverable is to present the researches that have been led for modelling learning and activities in CoPs. On the basis of these models, we developed Learning and Organisational ... [more ▼]

The purpose of this deliverable is to present the researches that have been led for modelling learning and activities in CoPs. On the basis of these models, we developed Learning and Organisational Resources (LORs) that are short activity scenarios aiming at developing learning, collaboration and uses of technological services in CoPs. The LORs are especially focused on the Generic Scenarios developed by WP5 and presented in D.IMP.08 i.e. ‘Reification’, ‘Debate & Decide’, and ‘Identity building’. The LORs have been trialled and evaluated by CoPs. In the conclusions, we synthesize the evaluation accounts from the CoPs and we provide advices for the use of the LORs by CoPs from various domains and contexts. [less ▲]

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See detailPredictors of Mortality after Endovascular Repair of the Thoracic Descending Aorta - The Preliminary New Zealand Experience.
Kolh, Philippe ULg

in European Journal of Vascular and Endovascular Surgery (2009), 37(2), 166-167

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See detailEchocardiography in the emergency roon: non-invasive imaging.
Pierard, Luc ULg; Lancellotti, Patrizio ULg

in Heart (2009), 95(2), 164

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See detailStress echocardiography expert consensus statement-executive summary: european association of echocardiography (a registrated branch of the ESC).
Sicari, R.; Nihoyannopoulos, P.; Evangelista, A. et al

in European Heart Journal (2009), 30(3), 278-89

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See detail2009 sera télescopique Le miroir liquide liégeois bientôt installé en Inde
Surdej, Jean ULg

Article for general public (2009)

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See detailDétection et estimation du niveau de la maladie rénale chronique
Delanaye, Pierre ULg; Cavalier, Etienne ULg; Mariat, Christophe et al

in Revue Médicale de Liège (2009), 64(2), 73-78

L’insuffisance rénale voit son incidence augmenter. Un diagnostic précoce et précis est requis. Le diagnostic de l’insuffisance rénale repose sur la mesure du débit de filtration glomérulaire. Les ... [more ▼]

L’insuffisance rénale voit son incidence augmenter. Un diagnostic précoce et précis est requis. Le diagnostic de l’insuffisance rénale repose sur la mesure du débit de filtration glomérulaire. Les formules basées sur la créatinine pour déterminer ce débit ont, par rapport à la créatinine sérique seule, apporté un plus mais, dans certaines situations, elles fournissent des résultats erronés. Le recours à la mesure de la clairance de créatinine sur une récolte d’urines de 24 heures peut être, dans ces situations où les caractéristiques anthropométriques sont hors normes, utile, mais avec toujours la difficulté d’une récolte minutée correcte. Si une mesure précise du débit de filtration glomérulaire est absolument nécessaire, une méthode de référence doit être choisie telle celle au chrome EDTA ou à l’iohexol. Enfin, tout bilan néphrologique doit, outre le dosage de créatinine, comprendre au moins une analyse d’urine à la tigette. Toute positivité pour la protéinurie lors de ce test mérite de réaliser un dosage quantitatif de la protéinurie soit sur 24 heures, soit plus aisément sur un échantillon [less ▲]

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See detailThe Beta Cephei star HD 180642: Full integration of CoRoT and ground data for mode identification
Briquet, Maryline ULg

Conference (2009, February)

The B1.5 II-III star HD 180642 is the only known Beta Cephei star in CoRoT’s core programme. To complement the space data of this target, both ground-based photometric and spectroscopic data were ... [more ▼]

The B1.5 II-III star HD 180642 is the only known Beta Cephei star in CoRoT’s core programme. To complement the space data of this target, both ground-based photometric and spectroscopic data were collected, to which we added several archival observations. In this talk, we describe our results from a full integration of CoRoT and intensive ground-based observations. The star is a non-linear dominant radial mode pulsator for which low-amplitude modes are detected for the fi rst time. A few of the latter are observed in our ground-based datasets so that a mode identifi cation for them is possible. To this end state-of-the-art techniques are adapted to be applied to a star with a highly non-linear behaviour of the radial mode. Additionally, a careful interpretation of the CoRoT lightcurve helps to identify the wavenumbers. Besides this outcome, the Van Hoof effect for the dominant mode is investigated and the stellar parameters and chemical abundances are determined. All this information is to be used as additional constraints to the CoRoT pulsation frequencies, for asteroseismic modelling of this Beta Cephei star. Additional abstracts cover the lightcurve modelling of this pulsator (Degroote et al.) as well as seismic modelling (Thoul et al.). [less ▲]

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See detailWhat Is The Role For Regulatory T-Cells After Nonmyeloablative Conditioning?
Humblet-Baron, S.; CASTERMANS, Emilie ULg; Vanbellinghen, J.-F. et al

in Biology of Blood & Marrow Transplantation (2009, February), 15(2), 122-123

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