References of "Scientific congresses and symposiums"
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See detailPlan de gestion de la diversité : la difficile construction des indicateurs?
Cornet, Annie ULg; Warland, P.

Conference (2007, October)

Detailed reference viewed: 25 (1 ULg)
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See detailUna proyección sintética para el diseño arquitectónico con la luz del sol
Benoit, Beckers; Masset, Luc ULg; Beckers, Pierre ULg

Conference (2007, October)

Detailed reference viewed: 122 (17 ULg)
See detailTo a TI Community System: Shared Diagnostic and Territorial Animation of a Seraing’s area (Belgium)
Charlier, J.; Devillet, Guénaël ULg; Brunetti, E. et al

in Acts of International Conference of Territorial Intelligence (2007, October)

Detailed reference viewed: 11 (1 ULg)
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See detailQuick data set generation and exact P-value computation in goodness-of-fit testing
Magis, David ULg

Conference (2007, October)

Detailed reference viewed: 5 (0 ULg)
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See detailInterest of a comparative proteomic approach to unravel the aetiology of DOMS in humans
Hody, Stéphanie ULg; Croisier, Jean-Louis ULg; WANG, François-Charles ULg et al

in Abstract Book of Proteom’ Lux 2007 (2007, October)

Detailed reference viewed: 16 (6 ULg)
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See detailDevelopment of original pyridinic analogues of nimesulide as cycloxygenase inhibitors
Renard, Jean-François ULg; de Leval, Xavier; Pirotte, Bernard ULg

Conference (2007, October)

Detailed reference viewed: 7 (1 ULg)
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See detailTechniques de marquage de la charge de fond des rivières
Hallot, Eric ULg; Houbrechts, Geoffrey ULg; Mols, Julien et al

Poster (2007, October)

Durant près d’une décennie, nous avons analysé le transport de la charge de fond dans une gamme de rivières de taille différente et situées dans des contextes géomorphologiques variés, au sein du massif ... [more ▼]

Durant près d’une décennie, nous avons analysé le transport de la charge de fond dans une gamme de rivières de taille différente et situées dans des contextes géomorphologiques variés, au sein du massif ardennais. Pour ce faire, des techniques de marquages traditionnels ont été mises en oeuvre (marquage de placette à la peinture, injection de galets peints) et des méthodes innovantes ont également été testées et développées (galets équipés d’émetteur radio, de pit-tag ou d’une charge métallique). Chacune de ces méthodes permet de déterminer certains aspects du transport de la charge de fond (paramètres de mobilisation, distance de charriage, compétence, échanges verticaux dans la couche active, tri hydraulique). Le type de marquage utilisé doit également être adapté aux caractéristiques intrinsèques de la rivière (pente, largeur, débit, espacement seuil mouille), de la charge de fond (granularité des sédiments, épaisseur de la couche active), de la disponibilité en matériaux et de l’héritage géomorphologique. Une étude systématique des taux de récupération des galets, des temps de mise en oeuvre, de la représentativité des résultats nous permet de présenter une première synthèse méthodologique détaillant les avantages et les inconvénients des différentes techniques en fonction du résultat escompté et du type de rivière. [less ▲]

Detailed reference viewed: 18 (3 ULg)
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See detailPhotorefractive holographic interferometry for movable artwork assessment
Thizy, Cédric ULg; Georges, Marc ULg; Koulompi, Eleni et al

in Hesselink, Lambertus; Feinberg, Jack (Eds.) Controlling Light with Light: Photorefractive Effects, Photosensitivity, Fiber Gratings, Photonic Materials and More (PR07) (2007, October)

Photorefractive holographic interferometry is applied to assessment of movable cultural heritage. Its role is to observe tiny signatures resulting from internal artwork characteristics. In the future, the ... [more ▼]

Photorefractive holographic interferometry is applied to assessment of movable cultural heritage. Its role is to observe tiny signatures resulting from internal artwork characteristics. In the future, the system will be used for both antifraud and restoration [less ▲]

Detailed reference viewed: 33 (2 ULg)
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See detailDesign, synthesis and anticancer activity of novel hydroxylated coumarin derivatives
Hemmer, Marc ULg; De Tullio, Pascal ULg; Bernard, Y. et al

Conference (2007, October)

Detailed reference viewed: 24 (0 ULg)
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See detailLaboratory, field and airborne spectroscopy for monitoring organic carbon content in agricultural soils
Stevens, A.; van Wesemael, B.; Tychon, Bernard ULg et al

Conference (2007, October)

This study explains the potential and the limits of a field ASD spectrometer and a CASI airborne instrument to assess the Soil Organic Carbon, in the context of soil carbon mapping.

Detailed reference viewed: 29 (2 ULg)
See detailAssurance-vie et planification patrimoniale
Leleu, Yves-Henri ULg

Conference (2007, October)

Detailed reference viewed: 74 (4 ULg)
Peer Reviewed
See detailGmsh: a three-dimensional finite element mesh generator with built-in pre- and post-processing facilities
Geuzaine, Christophe ULg; Remacle, J.-F.

in Proceedings of the Second Workshop on Grid Generation for Numerical Computations, Tetrahedron II (2007, October)

Detailed reference viewed: 39 (1 ULg)
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See detailThe lifetime of bouncing droplets
Terwagne, Denis ULg; Vandewalle, Nicolas ULg; Dorbolo, Stéphane ULg

Conference (2007, October)

Detailed reference viewed: 10 (2 ULg)
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See detailDo tonsilar FDCs express PrPc in sheep?
Toppets, Vinciane ULg; Piret,J; Minne,M et al

Poster (2007, October)

Detailed reference viewed: 9 (4 ULg)
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See detailCost-effectiveness of osteoporosis screening campaign for Belgian women
Hiligsmann, Mickaël ULg; Bruyère, Olivier ULg; Ethgen, Olivier ULg et al

in Value in Health (2007, October), 10(6), 395

Detailed reference viewed: 18 (1 ULg)
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See detailNovel Instrumentation for the Measurement of the Unsteady Pressure Distribution around a Wing Undergoing Stall Flutter Oscillations
Li, Jing; Dimitriadis, Grigorios ULg; Gu, Fengshu et al

in Autumn Conference of the Institute of Acoustics 2007: Advances in Noise and Vibration Engineering (2007, October)

In this work, a wind tunnel model of a wing undergoing stall flutter oscillations is studied. It is a rectangular wing with pitch and plunge degrees of freedom and low pitch stiffness. The objective of ... [more ▼]

In this work, a wind tunnel model of a wing undergoing stall flutter oscillations is studied. It is a rectangular wing with pitch and plunge degrees of freedom and low pitch stiffness. The objective of this study is to promote the understanding of the stall flutter phenomenon by measuring the unsteady pressure distribution around the wing as well as the wing displacement, during unforced motion in two degrees of freedom. Both steady and unsteady pressures must be measured with sufficient accuracy during two types of tests. In the static tests the wing is to be clamped in position and not allowed to move and the steady pressures are to be measured around the centre-span section at different angles of attack. Thus the stall angle of attack can be identified and the stall mechanism characterized. In the dynamic tests the wing will be allowed to move and the unsteady pressures will be measured and recorded during a number of cycles of the oscillation, at a number of free stream airspeeds. [less ▲]

Detailed reference viewed: 74 (2 ULg)
See detailThe influence of affective valence on false recognition in the Deese/Roediger & McDermott procedure.
Dehon, Hedwige ULg; Laroi, Frank ULg; van der linden, Martial

Poster (2007, October)

Detailed reference viewed: 7 (1 ULg)
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See detailClinico-pathological prognostic factors of IgA vasculitis
Bovy, Christophe ULg; Parotte, Marie-Christine ULg; Krzesinski, Jean-Marie ULg

in Acta Clinica Belgica (2007, October), 62(5), 369

Detailed reference viewed: 18 (0 ULg)
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See detailDesign, synthesis, and pharmacological evaluation of cromakalim analogues as pancreatic β-cell-selective KATP channel openers
Florence, X.; De Tullio, Pascal ULg; Lebrun, Ph. et al

Conference (2007, October)

Detailed reference viewed: 39 (0 ULg)
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See detailContrast and sensitivity performances of Elscint, General Electric, Siemens and SMV multi-heads cameras.
Kirkove, Murielle ULg; Seret, Alain ULg

in European Journal of Nuclear Medicine and Molecular Imaging (2007, October), 34(S2), 345

Detailed reference viewed: 50 (5 ULg)
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See detailMulticriterion Scantling Optimization of the Midship Section of a Passenger Vessel considering IACS Requirements
Richir, Thomas; Caprace, Jean-David ULg; Losseau, Nicolas ULg et al

in The 10th International Symposium on Practical Design of Ships and Other Floating Structures (PRADS) (2007, October)

In the scantling design of a passenger ship, minimum production cost, minimum weight and maximum moment of inertia (stiffness) are conflicting objectives. For that purpose, recent improvements were made ... [more ▼]

In the scantling design of a passenger ship, minimum production cost, minimum weight and maximum moment of inertia (stiffness) are conflicting objectives. For that purpose, recent improvements were made to the LBR-5 software (French acronym of “Stiffened Panels Software”, version 5.0) to optimize the scantling of ship sections by considering production cost, weight and moment of inertia in the optimization objective function. Moreover, IACS requirements regarding bending, shearing and buckling strength are currently available in LBR-5. Until now, only raw scantling optimizations were performed with LBR-5. Thanks to new developments using heuristics, it is now possible to realize discrete optimization so that a standardized and “ready to use” set of optimum scantlings can be obtained. [less ▲]

Detailed reference viewed: 337 (50 ULg)
See detailThe influence of affective valence on false recall in the Deese/Roediger & McDermott procedure.
Dehon, Hedwige ULg; Laroi, Frank ULg; Van der Linden, Martial

Poster (2007, October)

Detailed reference viewed: 5 (0 ULg)
See detailVoice disorders post thyroid surgery
FINCK, Camille ULg

Conference (2007, October)

Detailed reference viewed: 5 (0 ULg)
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See detailPhase control for the stabilization of a photorefractive holographic camera in perturbed environments
Thizy, Cédric ULg; Georges, Marc ULg; Lemaire, philippe

in Hesselink, Lambertus; Feinberg, Jack (Eds.) Controlling Light with Light: Photorefractive Effects, Photosensitivity, Fiber Gratings, Photonic Materials and More (2007, October)

The holographic interferometer developed by CSL, and which uses a BSO crystal, exhibits a response time of a few seconds. This prevents us to properly record holograms under perturbated environmental ... [more ▼]

The holographic interferometer developed by CSL, and which uses a BSO crystal, exhibits a response time of a few seconds. This prevents us to properly record holograms under perturbated environmental conditions due to optical phase variations between reference and object beams. We present hereafter several active phase control strategies to overcome this problem [less ▲]

Detailed reference viewed: 15 (1 ULg)
See detailStudy of VOC and odour emissions during the convective drying of urban residual sludges
Léonard, Angélique ULg; Martin, Georges; Nicolas, Jacques ULg et al

Conference (2007, October)

Detailed reference viewed: 40 (22 ULg)
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See detailEst-ce qu'il est possible d'obtenir le résultat véritable d'un élève même si celui-ci tente de tricher ?
Raîche, Gilles; Blais, Jean-Guy; Magis, David ULg

Conference (2007, October)

Detailed reference viewed: 11 (0 ULg)
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See detailPrevention and management of violence in Belgian psychiatric institutions: do current practices respect international guidelines?
Lardenois, Miguel; Duquesne, Patricia; Gillain, Nicolas ULg et al

Poster (2007, October)

Detailed reference viewed: 40 (10 ULg)
See detailActualisation des préparations all ceram
MAINJOT, Amélie ULg

Conference (2007, October)

Detailed reference viewed: 9 (0 ULg)
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See detailLandscape and participation: construction of a PhD research problem and an analysis method. Towards the comparative analysis of participatory processes of landscape management projects design on a local scale in the Walloon region (Belgium)
Droeven, Emilie ULg

Conference (2007, October)

A preliminary reflection to the definition of a PhD research problem on the concepts of participation, landscape and project, led the student to be interested in the participatory processes of landscape ... [more ▼]

A preliminary reflection to the definition of a PhD research problem on the concepts of participation, landscape and project, led the student to be interested in the participatory processes of landscape management projects design, and in the inhabitants landscapes representations. The method includes the comparative analysis of local processes of projects design, and the direct observation of two Walloon landscape management projects design (investigation conducted with stakeholders implied in the project design and among inhabitants, direct observation, organisation of participative meeting-debates. Fitting her research approach within the field of the territorial participative research-action, the PhD student assumes that the participation of the territorial actors and the population can “feed” the scientific research as well as territorial action. She reconsiders moreover some difficulties encountered in her research. [less ▲]

Detailed reference viewed: 177 (4 ULg)
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See detailVisualisation d'effets de paroi dans des lits de charbon actif par microtomographie à rayons X
Léonard, Angélique ULg; Wullens, Hilda; Marchot, Pierre ULg et al

in SFGP (Ed.) Récents progrès en génie des procédés N° 96 2007 : actes du 11° Congrès de la Société Française de Génie des Procédés 9-10-11 Octobre 2007, Saint-Étienne, France (2007, October)

Detailed reference viewed: 25 (2 ULg)
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See detailIntérêt de la microtomographie à rayons X pour la formulation de produits agroalimentaires
Léonard, Angélique ULg; Toye, Dominique ULg; Marchot, Pierre ULg et al

in SFGP (Ed.) Récents progrès en génie des procédés N° 96 2007 : actes du 11° Congrès de la Société Française de Génie des Procédés 9-10-11 Octobre 2007, Saint-Étienne, France (2007, October)

Detailed reference viewed: 52 (8 ULg)
See detailEntanglement of localized states
Martin, John ULg; Giraud, Olivier; Georgeot, Bertrand

Poster (2007, October)

Detailed reference viewed: 4 (0 ULg)
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See detailLe droit de vote de l'actionnaire
Caprasse, Olivier ULg

in L'actionnaire dans la société anonyme (2007, October)

Detailed reference viewed: 82 (20 ULg)
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See detailAdaptation of photorefractive holographic camera for observation of micro-mechanical structures
Georges, Marc ULg; Thizy, Cédric ULg; Loicq, Jerôme ULg et al

in Hesselink, L.; Feinberg, J. (Eds.) Controlling Light with Light: Photorefractive Effects, Photosensitivity, Fiber Gratings, Photonic Materials and More (PR07) (2007, October)

The photorefractive holographic camera initially working on large scattering objects has been adapted to observe centimetric to micrometric objects. Application on micro-mechanical systems is presented

Detailed reference viewed: 8 (1 ULg)
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See detailUtilité de 3 tests de marche différents pour isoler 3 populations de sujets âgés : intérêt de la double tâche
Warzee, Emmanuelle ULg; Gillain, Sophie ULg; Lekeu, Françoise ULg et al

in Abstract Book des 10èmes Journées d’Automne de la Société Belge de Gérontologie et de Gériatrie (2007, October)

Detailed reference viewed: 108 (17 ULg)
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See detailLe Locometrix : outil de dépistage des troubles de la marche chez la personne âgée ?
Gillain, Sophie ULg; Warzee, Emmanuelle ULg; Lekeu, Françoise ULg et al

in Abstract Book des 10èmes Journées d’Automne de la Société Belge de Gérontologie et de Gériatrie (2007, October)

Detailed reference viewed: 266 (34 ULg)
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See detailPolymer (PE) synthesis - scaling up to industrial scale
Detrembleur, Christophe ULg

Conference (2007, September 30)

Detailed reference viewed: 27 (2 ULg)
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See detailLes répercussions chez l’enfant du trouble psychique du parent : de la vie fœtale à plus tard.
Battisti, Oreste ULg; Marguglio, A; Caron, A

Conference (2007, September 29)

Detailed reference viewed: 72 (7 ULg)
See detailJuvenile delinquency and gender issues
Gavray, Claire ULg

Conference (2007, September 28)

Detailed reference viewed: 17 (3 ULg)
See detailCarnival and Homecoming in Robert Antoni's Carnival
Najar, Imen ULg

Conference (2007, September 28)

Detailed reference viewed: 6 (1 ULg)
See detailAway from a Definition of African Literature(s)
Tunca, Daria ULg

Conference (2007, September 27)

Detailed reference viewed: 11 (0 ULg)
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See detailIntertextual Transformations in the Work of Janet Frame
Delrez, Marc ULg

Conference (2007, September 27)

Detailed reference viewed: 12 (0 ULg)
See detailPrevention of GBS perinatal infections: guidelines and update
Melin, Pierrette ULg

Conference (2007, September 27)

Detailed reference viewed: 10 (1 ULg)
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See detailRelation between the poultry production systems and the Highly Pathogenic Avian Influenza (HPAI) in Vietnam
Phan Dang, Thang ULg; Marisa Peyre; Stéphanie Desvaux et al

in 13th International Conference of the Asian – Australasian Association of Animal Production Societies (AAAP) (2007, September 22)

In 2003, the poultry population was about 254.6 millions heads. The poultry herd is mainly concentrated in the Red River Delta (RRD) and in the Mekong Delta with about 50% of poultry population. The ... [more ▼]

In 2003, the poultry population was about 254.6 millions heads. The poultry herd is mainly concentrated in the Red River Delta (RRD) and in the Mekong Delta with about 50% of poultry population. The Highly Pathogenic Avian Influenza caused by H5N1 virus was removed in almost of provinces in Vietnam from 2004 until now but millions of birds were culled to reach this situation and it had large economical and sociological impacts. A question emerge: how can we limit this epidemic? A research on the relation between poultry production systems and the HPAI had been carried out in two provinces: Ha Tay (RRD) and Long An (Mekong Delta) from March to August 2007. The results showed that there are three principal poultry production systems which are commercial poultry production systems with good breeding facilities (system 1); commercial poultry production systems without good breeding facilities (system 2), and small scale poultry production system (system 3). The number of birds reared in the commercial systems was more important than that of the small system, conversely the number of species rising in the system 2 and 3 was more important than in the system 1. The proportion of households having poultry herd with HPAI in the period of 2003-2005 in the system 2 and 3 were more important than that of the system 1 (21-59% compare with 33-36%). The study had showed that all poultry belonging to the system 1 were vaccinated; when the proportion of vaccinated animals were about 87-90% for the system 2, and 58% for the system 3. [less ▲]

Detailed reference viewed: 29 (0 ULg)
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See detailAmphibia-Reptilia: Editorial report 2005-2007
Denoël, Mathieu ULg

Conference (2007, September 22)

Detailed reference viewed: 13 (0 ULg)
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See detailIntroducing teachers and instructional developers to learning objects Four suggested shifts in prevailing discourse
Verpoorten, Dominique ULg

in Targamadze, A (Ed.) Proceedings of the Advanced Learning Technologies and Applications conference (ALTA’2007) (2007, September 20)

Being convinced that the learning objects yields value creation promises for e-learning, the author, drawing on state-of-the art literature, his experience of two European projects dealing with learning ... [more ▼]

Being convinced that the learning objects yields value creation promises for e-learning, the author, drawing on state-of-the art literature, his experience of two European projects dealing with learning objects and his experience as a teacher, documents 4 issues regarding teachers' awareness and acceptance of this emergent instructional design approach. [less ▲]

Detailed reference viewed: 19 (1 ULg)
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See detailSocial dialogue in Europe: reason and method of the transnational comparison
Orianne, Jean-François ULg

Conference (2007, September 20)

Detailed reference viewed: 5 (0 ULg)
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See detailChecking the internal pedagogical consistency of a game learning situation: the Leclercq’s triple consistency triangle
Castaigne, J.-L.; Petit, L; Verpoorten, Dominique ULg

in Targamadze, A (Ed.) Proceedings of the Advanced Learning Technologies and Applications (ALTA) conference (2007, September 20)

Leclercq’s triangle is a conceptual tool used for securing the pedagogical validity of learning situations. It materializes the sound pedagogy principle which commands to establish a triple consistency ... [more ▼]

Leclercq’s triangle is a conceptual tool used for securing the pedagogical validity of learning situations. It materializes the sound pedagogy principle which commands to establish a triple consistency between objectives, methods and evaluation in any given learning situation. The ELEKTRA adventure game provides a practical illustration of its relevance. [less ▲]

Detailed reference viewed: 37 (1 ULg)
See detailLe gender mainstreaming et le gender budgeting en Belgique
Cornet, Annie ULg

Conference (2007, September 19)

Detailed reference viewed: 31 (1 ULg)
See detailHow fertilizer and soil nitrogen are distributed into winter wheat plant
Boulelouah, Nadia; Destain, Jean-Pierre ULg; Bodson, Bernard ULg et al

(2007, September 16)

Detailed reference viewed: 25 (0 ULg)
See detailRole of masks, caps, gowns and skin disinfection
Brichant, Jean-François ULg

Conference (2007, September 15)

Detailed reference viewed: 9 (1 ULg)
Peer Reviewed
See detailTransgression sexuelle à l’adolescence : un passage à l’acte sexuel dans le parcours de la délinquance ou un passage à l’acte délinquant dans le parcours sexuel de ces adolescents ?
Glowacz, Fabienne ULg

Conference (2007, September 14)

Depuis quelques années, en Belgique, notre pratique d’expert judiciaire rend compte d’une augmentation des signalements et de plaintes d’abus sexuel à l’encontre d’adolescents ainsi que de l’abaissement ... [more ▼]

Depuis quelques années, en Belgique, notre pratique d’expert judiciaire rend compte d’une augmentation des signalements et de plaintes d’abus sexuel à l’encontre d’adolescents ainsi que de l’abaissement de l’âge de ces adolescents suspectés de tels agissements sur des enfants pré-pubères ou des pairs. Si ces adolescents ont en commun cette transgression sexuelle qui prend diverses formes, tous les auteurs ( Worling, 2001, Barbaree and Marshall, 2006, Hunter J.A., Figueredo A.J., Malamuth N.M. & Becker J.V., 2003 …) s’accordent sur le fait que ces adolescents et pré-adolescents forment un groupe hétérogène au niveau de leur mode de fonctionnement psychologique, social et sexuel, et au niveau de leur engagement dans la délinquance. Dans le cadre de notre communication, à partir des données préliminaires d’une recherche portant sur le fonctionnement psychologique et psycho-social de ces pré-adolescents et adolescents, et d’une présentation de vignettes cliniques, nous développerons les différentes formes de passages à l’acte transgressif au niveau sexuel selon l’âge des adolescents et l’âge des victimes, et nous tenterons de comprendre l’inscription de cet acte au niveau du de développement psycho-social de l’adolescent et de son engagement dans la délinquance. Une analyse plus spécifique portera sur le mode de consommation pornographique de ces mineurs « transgresseur sexuel » qui sera comparé au mode de consommation pornographique d’un échantillon d’adolescents et adolescentes non délinquants et à un groupe d’adolescents et adolescentes délinquants. [less ▲]

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See detailVariétés: froment d'hiver
Vancutsem, Françoise ULg; Couvreur, Luc; Bodson, Bernard ULg et al

in Livre Blanc: Céréales - Gembloux (2007, September 13)

Detailed reference viewed: 22 (4 ULg)
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See detailVariétés: escourgeon et orge d'hiver fourragers
Monfort, Bruno; Herman, Jean-Luc; Couvreur, Luc et al

in Livre Blanc: Céréales - Gembloux - Informations avant les semis (2007, September 13)

Detailed reference viewed: 5 (0 ULg)
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See detailImplantation des cultures
Bodson, Bernard ULg; Vancutsem, Françoise ULg; Monfort, Bruno

in Livre Blanc: Céréales - Gembloux - Informations avant les semis (2007, September 13)

Detailed reference viewed: 139 (12 ULg)
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See detailQualité: récolte 2007: encore une récolte difficile à gérer!
Sinnaeve, Geoges; Paridaens, A.-M.; Chandelier, Anne et al

in Livre Blanc: Céréales - Gembloux (2007, September 13)

Detailed reference viewed: 21 (0 ULg)
Peer Reviewed
See detailActivity of metalloproteinases mmp2 and mmp9 in matched serum and bronchoalveolar lavage fluidsamples from dogs with chronic bronchitis cvresus recurrent infectious bronchopneumonia
Bolognin, M.; Kirschvink, N.; Wiggers, L. et al

in 17th ECVIM Meeting - Budapest - Hongrie - Septembre 2007 (2007, September 13)

Detailed reference viewed: 8 (0 ULg)
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See detailPotential of space-based infrared Bracewell interferometers for planet detection
Defrere, Denis ULg; Absil, Olivier ULg; Hanot, Charles ULg et al

in Coulter, D. (Ed.) Techniques and Instrumentation for Detection of Exoplanets III (2007, September 12)

The Darwin and TPF-I space missions will be able to study the atmosphere of distant worlds similar to the Earth. Flying these space-based interferometers will however be an extraordinary technological ... [more ▼]

The Darwin and TPF-I space missions will be able to study the atmosphere of distant worlds similar to the Earth. Flying these space-based interferometers will however be an extraordinary technological challenge and a first step could be taken by a smaller mission. Several proposals have already been made in this context, using the simplest nulling scheme composed of two collectors, i.e., the original Bracewell interferometer. Two of these projects, viz. Pegase and the Fourier-Kelvin Space Interferometer, show very good perspectives for the characterisation of hot extra-solar giant planets (i.e., Jupiter-size planets orbiting close to their parent star). In this paper, we build on these concepts and try to optimise a Bracewell interferometer for the detection of Earth-like planets. The major challenge is to efficiently subtract the emission of the exo-zodiacal cloud which cannot be suppressed by classical phase chopping techniques as in the case of multi-telescopes nulling interferometers. We investigate the potential performance of split-pupil configurations with phase chopping and of OPD modulation techniques, which are good candidates for such a mitigation. Finally, we give a general overview of the performance to be expected from space-based Bracewell interferometers for the detection of extra-solar planets. In particular, the prospects for known extra-solar planets are presented. [less ▲]

Detailed reference viewed: 27 (9 ULg)
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See detailRegulation of CXCL8/IL-8 by Zonula Occludens-1 during breast tumor-associated epithelial-to-mesenchymal transitions.
Mestdagt, M; Polette, M; Bindels, S et al

Poster (2007, September 10)

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See detailFunctional Characterization of Snail2 repression complex
Molina Ortiz, Patricia ULg; MacPherson, Matthew; Cano, Amparo et al

Poster (2007, September 10)

Snail2, also called Slug, is a member of the Snail-family of zinc-finger transcription factors that plays a significant role both during development and carcinogenesis, by controlling epithelial ... [more ▼]

Snail2, also called Slug, is a member of the Snail-family of zinc-finger transcription factors that plays a significant role both during development and carcinogenesis, by controlling epithelial-mesenchymal transition (EMT) processes. Snail2 has been also described as a direct transcriptional repression of E-cadherin during EMT being implicated as a prosurvival factor during tumorogenesis. Snail1 and Snail2 are highly homologous factors, containing a common N-terminal transrepressor domain (SNAG), a C-terminus DNA binding domain of four (Snail1) or five (Snail2) zinc fingers, and a divergent central region, which in Snail2 is formed by a unique domain called `Slug domain´ whose function remains to be elucidated. Snail1 repressor activity has been shown to be dependent on SNAG-mediated interaction with a repression complex formed by the corepressor mSin3a and histone deacetylases 1/2 (HDAC1/2). Importantly Snail1 transcription factor is further regulated through phosphorylation by various kinases. However, at date little is known about the control of Snail2 repressor activity. Here, we present interesting data shedding light into the regulation and function of Snail2 as a E-cadherin repressor. For this purpose we have performed ectopic expression of several Snail2 deletion mutants and examined the contribution of the specific domains to protein stability, localization and E-cadherin repressor activity. These data reveal a key role for the `Slug domain´ to repress E-cadherin expression. Furthermore, in vivo phosphorylation analysis revealed that specific phosphorylation on Snail2 protein is implicated in Snail2 function as a transcriptional repressor whose functional significance is currently being investigated. [less ▲]

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See detailPeptides entrapped in biodegradable PLGA microparticles accelerate tissue repair at gastric ulcer treatment in rats
Markvicheva, E; Stashevskaya, K; Prudchenko, I et al

Conference (2007, September 09)

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See detailExploring the Formation Pathways of DNA G-Quadruplex Architectures
Rosu, Frédéric ULg; Poncelet, Harmonie; Teulade-Fichou, Marie-Paule et al

Conference (2007, September 07)

Guanine-rich DNA strands can form the so-called G-quadruplex architectures due to the formation of quartets of guanines linked by 8 hydrogen bonds. G-quadruplexes are further stabilized by the inclusion ... [more ▼]

Guanine-rich DNA strands can form the so-called G-quadruplex architectures due to the formation of quartets of guanines linked by 8 hydrogen bonds. G-quadruplexes are further stabilized by the inclusion of cations between the G-quartets. The abundance of G-rich regions throughout the genome and their very presence in telomeric regions made G-quadruplexes interesting targets. NMR and crystallographic studies of G-quadruplex structures revealed amazing variety in the G-quadruplex topologies. The next challenge will be to understand the rules governing the formation of the various topologies, in order to predict relevant G-quadruplexes in the genome, and in order to act rationally on their formation or disruption. To date, only few experimental [1] or theoretical [2] studies have been devoted to investigating the mechanisms of G-quadruplex formation. We report here a detailed investigation of DNA G-quadruplex formation pathways using electrospray mass spectrometry (ESI-MS). The sequences TGnT (n = 3-6) were purchased from Eurogentec (Seraing, Beliugm). ESI-MS experiments were performed in the negative ion mode on a Q-TOF Ultima Global (Waters, Manchester, UK). The cation used was ammonium (up to 150 mM). Experiments were performed in the presence and absence of methanol (up to 20%) as co-solvent. ESI-MS allows counting both the number of strands and the number of cations in each intermediate. We could confirm the presence of transient dimer and trimer intermediates in low abundance. More unexpectedly, ESI-MS also reveals unambiguously the formation of pentamers which contain ammonium cations. The pentamers slowly convert into tetramers. Counting the number of included cations also revealed that, in the case of (TG6T)4, inclusion of four ammonium cations is fast, while the inclusion of the last ammonium ion is very slow. We also found that the addition of methanol (initially added to obtain higher ion intensities) significantly increases the rate of G-quadruplex formation. Finally, we also investigated the role of G-quadruplex ligands in the rate of formation of G-quadruplexes. We could classify the ligands according to their increase of G-quadruplex formation kinetics, and distinguish the intermediates. Interestingly, one ligand showed formation of a higher-order structure by bridging two G-quadruplexes. Acknowledgement: The authors thank the FRS-FNRS for their support. References: [1] J. Gros et al., Nucleic Acids Res., 2007, doi:10.1093/nar/gkm111. [2] R. Stefl et al., Biophys. J., 2003, 85(3), 1787-1804. [less ▲]

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See detailNew Data on Political Interest and Participation of the Young People (16-18 y. old) in Liège, Belgium
Fournier, Bernard ULg; Reuchamps, Min ULg

Conference (2007, September 06)

In 1990, one of us administered a questionnaire to 640 students from nine high schools in Liège (Belgium) and its suburb. The survey aimed at measuring the political interest of the youth and their level ... [more ▼]

In 1990, one of us administered a questionnaire to 640 students from nine high schools in Liège (Belgium) and its suburb. The survey aimed at measuring the political interest of the youth and their level of participation in a wide range of associations. The questionnaire, which was also administered in Quebec and Paris, was made of 200 other indicators (confidence toward the institutions, impact of the political decisions, role of the state, etc.). Last spring, we administered a similar questionnaire to the same schools in order to compare the data gathered in our previous researches and the new data. The comparison will engage the oft-asked questions in the field about political participation—or its decline—amongst the youth. The new data show, as in 1990, that approximately two-thirds of the students (16-18 years old) participate in associational life in a broad sense. Political participation sensu stricto is still less popular than participation in organisations campaigning for the defence of human rights or the environment. We also observe significant differences in the traditional sociological categories. Yet, as we did for the 1990 data, we shall move our analysis beyond the usual sociological categories in order to stress the internal differences between groups. As such, we shall privilege the analysis in terms of classifications. With a more precise image of the various forms of participation as well as the attitudes related to it, different patterns will characterise young people’s participation. Accordingly, our understanding of the political socialisation’s mechanisms will be adapted. Such an inquiry seems necessary in order to engage the traditional views on political participation and interest of today’s youth. [less ▲]

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See detailState of the Art in Spinal Cord Injury – Research and Clinical Application
Martin, Didier ULg

Conference (2007, September 06)

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See detailMacromolecular engineering of cyclic aliphatic polyesters by ring-opening polymerization and "click" chemistry
Lecomte, Philippe ULg; Li, Haiying; Riva, Raphaël ULg et al

Conference (2007, September 04)

The last decades have witnessed a steadily increasing progress in the macromolecular engineering of the main families of synthetic polymers. Ring-shaped copolymers show a unique topology due to the ... [more ▼]

The last decades have witnessed a steadily increasing progress in the macromolecular engineering of the main families of synthetic polymers. Ring-shaped copolymers show a unique topology due to the absence of any chain-end and exhibit distinct properties from their linear counterparts, such as glass transition temperature, order-disorder transition, reduced viscosity, lower hydrodynamic volumes. This communication aims at reporting on a novel route to biodegradable cyclic polyesters. Our strategy is based on the work of Prof. Kricheldorf who initiated the ring-opening polymerization of ε-caprolactone by cyclic tin dialkoxides, e.g., 2,2-dibutyl-2-stanna-1,3-dioxepane (DSDOP) in order to obtain “living” macrocyclic PCL, still containing two endocyclic tin-oxygen bonds. In this work, the resumption of polymerization by a few units of ε-caprolactone substituted by an acrylic unit, e.g., 1-(2-oxooxepan-3-yl)ethyl prop- 2-enoate, followed by intramolecular photo-crosslinking of pendant unsaturations and finally by hydrolysis gave rise to macrocyclic PCL. As a rule, this strategy is very well-suited for the synthesis of high molecular weight PCL. Moreover, tin alkoxides were kept untouched after the cross-linking step and remained thus available for further macromolecular engineering. The process was extended to the synthesis of other architectures such as sun-shaped, two-tail tadpoleshaped, and eight-shaped copolyesters. The second part of the lecture, it will be shown that the copper(I)-catalyzed Huisgen’s [3+2] cycloaddition, which is the most popular “Click" reaction, is very efficient to graft alkynes, duly substituted by functional groups or chains, onto aliphatic copolyesters bearing pendant azides. Interestingly enough, mild conditions were found and no degradation was observed during the “click” derivatization of copolyesters of PCL. The “click” reactions of alkynes onto pendant azides of copolyesters of PLA, by far more sensitive than PCL, was also successfully carried out without any detectable degradation. ”Click” chemistry is very versatile because this reaction was successfully implemented to graft functional groups or chains directly onto ω-azido-ε-caprolactone, without any ring-opening of the lactone, in order to make available a new range of functional caprolactones. Finally, the “click” grafting of PEO onto the tails of tadpole-shaped copolymers will be shown to be a route to amphiphilic copolymers with an original architecture. [less ▲]

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See detailPlanktonic Archaea in Lake Kivu
Llirós, Marc; Darchambeau, François ULg; Plasencia, Anna et al

Conference (2007, September 02)

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See detailFresnel rhombs as achromatic phase shifters for infrared nulling interferometry: first experimental results
Hanot, Charles ULg; Mawet, D.; Loicq, Jerôme ULg et al

in Coulter, Daniel R (Ed.) "Techniques and Instrumentation for Detection of Exoplanets III" Proceedings of the SPIE, Volume 6693, Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series (2007, September 01)

One of the most critical units of nulling interferometers is the Achromatic Phase Shifter. The concept we propose here is based on optimized Fresnel rhombs, using the total internal reflection phenomenon ... [more ▼]

One of the most critical units of nulling interferometers is the Achromatic Phase Shifter. The concept we propose here is based on optimized Fresnel rhombs, using the total internal reflection phenomenon, modulated or not. The total internal reflection induces a phase shift between the polarization components of the incident light. We present the principles, the current status of the prototype manufacturing and testing operations, as well as preliminary experiments on a ZnSe Fresnel rhomb in the visible that have led to a first error source assessment study. Thanks to these first experimental results using a simple polarimeter arrangement, we have identified the bulk scattering as being the main error source. Fortunately, we have experimentally verified that the scattering can be mitigated using spatial filters and does not decrease the phase shifting capabilities of the ZnSe Fresnel rhomb. [less ▲]

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See detailThe annular groove phase mask coronagraph: an achromatic optical vortex
Mawet, D.; Riaud, Pierre ULg; Hanot, Charles ULg et al

in Coulter, Daniel R (Ed.) "Techniques and Instrumentation for Detection of Exoplanets III" Proceedings of the SPIE, Volume 6693, Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series (2007, September 01)

The Annular Groove Phase Mask coronagraph (AGPM) is an intrinsically achromatic vectorial vortex. It consists of integrated subwavelength optical elements whose space-variant polarization properties can ... [more ▼]

The Annular Groove Phase Mask coronagraph (AGPM) is an intrinsically achromatic vectorial vortex. It consists of integrated subwavelength optical elements whose space-variant polarization properties can be engineered and optimized to synthesize one of the theoretically most efficient coronagraphs. This paper briefly recalls the principles of the AGPM, presents the benefit of its implementation inside a polarimetric differential imager, realistic numerical simulations assessing its performances, as well as the current status of the near-infrared and visible prototype manufacturing operations. [less ▲]

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See detailSTEREO: Heliospheric Imager design, pre-flight, and in-flight response comparison
Halain, Jean-Philippe ULg; Mazy, Emmanuel ULg; Defise, Jean-Marc ULg et al

in Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series (2007, September 01)

The Heliospheric Imager (HI) is part of the SECCHI suite of instruments on-board the two STEREO observatories launched in October 2006. The two HI instruments provide stereographic image pairs of solar ... [more ▼]

The Heliospheric Imager (HI) is part of the SECCHI suite of instruments on-board the two STEREO observatories launched in October 2006. The two HI instruments provide stereographic image pairs of solar coronal plasma and coronal mass ejections (CME) over a field of view ranging from 13 to 330 R[SUB]0[/SUB]. The HI instrument is a combination of two refractive optical systems with a two stage multi-vane baffle system. The key challenge of the instrument design is the rejection of the solar disk light by the front baffle, with total straylight attenuation at the detector level of the order of 10[SUP]-13[/SUP] to 10[SUP]-15[/SUP]. Optical systems and baffles were designed and tested to reach the required rejection. This paper presents the pre-flight optical tests performed under vacuum on the two HI flight models in flight temperature conditions. These tests included an end-to-end straylight verification of the front baffle efficiency, a co-alignment and an optical calibration of the optical systems. A comparison of the theoretical predictions of the instrument response and performance with the calibration results is presented. The instrument in-flight photometric and stray light performance are also presented and compared with the expected results. [less ▲]

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See detailSWAP: a novel EUV telescope for space weather
Defise, Jean-Marc ULg; Halain, Jean-Philippe ULg; Berghmans, David et al

in Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series (2007, September 01)

The SWAP telescope (Sun Watcher using Active Pixel System detector and Image Processing) is being developed to be part of the PROBA2 payload, an ESA technological mission to be launched in early 2008 ... [more ▼]

The SWAP telescope (Sun Watcher using Active Pixel System detector and Image Processing) is being developed to be part of the PROBA2 payload, an ESA technological mission to be launched in early 2008. SWAP is directly derived from the concept of the EIT telescope that we developed in the '90s for the SOHO mission. Several major innovations have been introduced in the design of the instrument in order to be compliant with the requirements of the PROBA2 mini-satellite: compactness with a new of-axis optical design, radiation resistance with a new CMOS-APS detector, a very low power electronics, an athermal opto-mechanical system, optimized onboard compression schemes combined with prioritization of collected data, autonomy with automatic triggering of observation and off-pointing procedures in case of Solar event occurrence, ... All these new features result from the low resource requirements (power, mass, telemetry) of the mini-satellite, but also take advantage of the specificities of a modern technological platform, such as quick pointing agility, new powerful on-board processor, Packetwire interface and autonomous operations. These new enhancements will greatly improve the operations of SWAP as a space weather sentinel from a low Earth orbit while the downlink capabilities are limited. This paper summarizes the conceptual design, the development and the qualification of the instrument, the autonomous operations and the expected performances for science exploitation. [less ▲]

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