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See detailFondements et enjeux de la politique dans l'oeuvre de Jacques-Joseph Duguet
Vanhoorne, Frédérick ULg

in Aventurier, Gérard; McKenna, Anthony (Eds.) Jacques-Jospeh Duguet (1649-1733) : actes du colloque de Montbrison, 1er avril 2006 (in press)

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See detailLouise de Savoie et la chambre des Bucoliques
Fagnart, Laure ULg

in Brioist, Pascal; Fagnart, Laure; Michon, Cédric (Eds.) Louise de Savoie (1476-1531) (in press)

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See detailCombining seismology and spectropolarimetry of hot stars
Neiner, Coralie; Briquet, Maryline ULg; Mathis, Stéphane et al

in IAU Symosium 307 (in press)

Asteroseismology and spectropolarimetry have allowed us to progress significantly in our understanding of the physics of hot stars over the last decade. It is now possible to combine these two techniques ... [more ▼]

Asteroseismology and spectropolarimetry have allowed us to progress significantly in our understanding of the physics of hot stars over the last decade. It is now possible to combine these two techniques to learn even more information about hot stars and constrain their models. While only a few magnetic pulsating hot stars are known as of today and have been studied with both seismology and spectropolarimetry, new opportunities - in particular Kepler2 and BRITE - are emerging and will allow us to rapidly obtain new combined results. [less ▲]

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See detailThe Profession of Printer in the Southern Netherlands before the Reformation. Considerations on Professional, Religious and State Legislations
Adam, Renaud ULg

in Soen, Violet; Vanysacker, Dries; François, Wim (Eds.) Censorship and Catholic Reform in the Early Modern Low Countries (in press)

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See detail"Die Komödie muss aus werden". Schwellenbewusstsein und Selbstreflexivität bei Arthur Schnitzler: "Die kleine Komödie" von 1895
Küpper, Achim ULg

in Liebrand e.a., Claudia (Ed.) Vielheit und Einheit der Germanistik weltweit: Kongressakten. Sektionen 47, 60 und 34 (in press)

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See detailBattista Guarino, 'Sermone del cane e del cavallo'. Un texte inconnu à la cour des Este
Valenti, Gianluca ULg; Van den Abeele, Baudouin

in Actes du Colloque international Chevaux, chiens, faucons. L’art vétérinaire antique et médiéval à travers les sources écrites, archéologiques et iconographiques (in press)

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See detailLa dynastie belge et la science sous le règne d’Albert Ier
Pirot, Pascal ULg

in Actes du Neuvième Congrès de l'Association des cercles francophones d'histoire et d'archéologie de Belgique, Liège, 23-26 août 2012 (Tome II). (in press)

La présente communication a pour objectif d’étudier le rôle de la dynastie belge dans le développement scientifique en Belgique sous le règne d’Albert Ier. Sont ici concernés le Roi, mais aussi la reine ... [more ▼]

La présente communication a pour objectif d’étudier le rôle de la dynastie belge dans le développement scientifique en Belgique sous le règne d’Albert Ier. Sont ici concernés le Roi, mais aussi la reine Elisabeth et leurs enfants, au premier rang desquels figure le prince Léopold, ainsi que l’entourage du souverain, à savoir la Maison du Roi (Grand Maréchal, Liste civile, Cabinet, Maison militaire) et les personnalités proches (issues des milieux académiques, industriels et politiques notamment). La première partie de l’exposé concernera la personne du roi. Si la Constitution belge limite son action, celui-ci exerce une « magistrature d’influence » qui se marque par le colloque singulier, les relations ou le patronage, notamment en matière de science. Il s’agira ici de déconstruire et d’analyser les origines du mythe du « roi-savant ». L’étude portera ensuite sur la reconstitution des milieux, des cultures, des climats intellectuels dans l’entourage d’Albert et Elisabeth ; par corollaire les projets initiés ou soutenus à la cour. Plusieurs pistes de réflexion seront dès lors abordées: conception par les personnes précitées du rôle de la science dans la société ; influence de celles-ci dans le développement de la science (institutions, initiatives, projets) ; rapports entre la dynastie et les institutions scientifiques ; étude des relations entre la dynastie et le Congo dans le domaine de la science. L’objectif sera de voir dans quelle mesure les réseaux constitués ont pu constituer les prémisses d’une « politique scientifique ». Cette communication, basée en grande partie sur les archives conservées au Palais royal de Bruxelles, s’intègre dans le cadre, plus large, d’une thèse de doctorat entamée à l’Université de Liège en octobre 2011, laquelle est consacrée aux relations science-dynastie depuis Albert Ier jusqu’au début du règne de Baudouin et la « Commission nationale des sciences » de 1959. [less ▲]

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See detailLe traitement de l’Histoire Auguste selon les méthodes du LASLA : descriptif du projet et perspectives linguistiques
Longrée, Dominique ULg; Bertrand-Dagenbach, Cécile

in Cuzzolin, P, Fedriani, Ch (Ed.) Actes du Colloque Latin vulgaire et Latin Tardif, LVLT 10, Bergame, 5-8 septembre 2013 (in press)

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See detail« Semen est sanguis christianorum » (Apol. 50, 13). Tertullien et l'hagiographie africaine
Fialon, Sabine ULg

in Lagouanère, Jérôme; Fialon, Sabine (Eds.) Tertullianus Afer. Tertullien et la littérature chrétienne d'Afrique, IIe-VIe siècle (in press)

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See detailAu seuil de l’Histoire de ma vie : la Préface en trois versions des mémoires de Casanova (1791, 1794, 1797)
Tilkin, Françoise ULg

in Annales Littéraires de Franche-Comté (PUFC). (in press)

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See detailLes mentions d'auteurs antiques dans les chansons de geste françaises
Henrard, Nadine ULg

in Haugeard, Philippe; Ribémont, Bernard (Eds.) Chanson de geste et savoirs savants (in press)

Les origines savantes ou populaires des épopées françaises médiévales ont longtemps fait débat. Il s'avère que ces textes contiennent un très grand nombre de références à des personnages issus de ... [more ▼]

Les origines savantes ou populaires des épopées françaises médiévales ont longtemps fait débat. Il s'avère que ces textes contiennent un très grand nombre de références à des personnages issus de l’Antiquité qui témoignent d’une formation scolaire chez les auteurs des chansons. Sur la base d'un examen de l'ensemble du corpus, cette étude s'intéresse plus particulièrement aux mentions explicites faites à des auteurs antiques, qu'ils soient grecs (Homère, Aristote, Platon) ou latins (Virgile, Ovide, César, Caton, Sénèque). En tenant de déterminer les traditions qui ont pu nourrir l'inspiration des auteurs des chansons de geste, elle s'emploie à définir les situations dans lesquelles les références en question apparaissent, et s’interroge sur les finalités que poursuivent les poètes à travers l’évocation des auteurs antiques, dont certains, comme César ou Virgile, sont davantage restés dans les mémoires pour des éléments réels ou imaginaires de leur vie plutôt que pour leur œuvre. [less ▲]

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See detailLe débat sur la véritable nature du corail
Vandersmissen, Jan ULg

in Actes du IXe Congrès de l’Association des Cercles francophones d’Histoire et d’Archéologie de Belgique (in press)

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See detailO insecabilis unitas ? Augustinisme et théologie politiques
Close, Florence ULg

in Depreux, Philippe; Esders, Stefan (Eds.) La productivité d'une crise: le règne de Louis le Pieux (814-840) et la transformation de l'Empire carolingien / Produktivität einer Krise: Die Regierungszeit Ludwigs des Frommen (814-840) und die Transformation des karolingischen Imperium » (Limoges, mars 2011) (in press)

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See detailMathématiques convoquées par le registre graphique au sein du cours de physique
Renkens, Céline; Henry, Valérie ULg

in Actes de la CIEAEM 66 (in press)

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See detailLe système belge des brevets au 19ème siècle
Peters, Arnaud ULg

in Actes du colloque "Nouvelles sources, nouvelles approches, nouvelles méthodes dans la recherche historique (in press)

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See detailPET imaging analysis using a parcelation approach and multiple kernel classification
Segovia-Román, Fermín ULg; Phillips, Christophe ULg

in International Workshop on Pattern Recognition in Neuroimaging, Tübingen 4-6 June 2014 (in press)

Positron Emission Tomography (PET) is a non-invasive medical imaging modality that provides information about physiological processes. Due to its ability to measure the brain metabolism, it is widely used ... [more ▼]

Positron Emission Tomography (PET) is a non-invasive medical imaging modality that provides information about physiological processes. Due to its ability to measure the brain metabolism, it is widely used to assist the diagnosis of neurodegenerative disorders such as Alzheimer’s disease (AD) of Parkinsonism. In order to avoid the subjectivity inherent to the visual exploration of the images, several computer systems to analyze PET data were developed during the last years. However, dealing with the huge amount of information provided by PET imaging is still a challenge. In this work we present a novel methodology to analyze PET data that improves the automatic differentiation between controls and AD patients. First the images are divided into small regions or parcels, defined either anatomically, geometrically or randomly. Secondly, the accuray of each single region is estimated using a Support Vector Machine (SVM) classifier and a cross-validation approach. Finally, all the regions are assessed together using multiple kernel SVM with a kernel per region. The classifier is built so that the most discriminative regions have more weight in the final decision. This method was evaluated using a PET dataset that contained images from healthy controls and AD patients. The classification results obtained with the proposed approach outperformed two recently reported computer systems based on Principal Component Analysis and Independent Component Analysis. [less ▲]

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See detailThe B Fields in OB Stars (BOB) Survey
Morel, Thierry ULg; Castro, N.; Fossati, L. et al

in IAU Symposium (in press)

The B fields in OB stars (BOB) survey is an ESO large programme collecting spectropolarimetric observations for a large number of early-type stars in order to study the occurrence rate, properties, and ... [more ▼]

The B fields in OB stars (BOB) survey is an ESO large programme collecting spectropolarimetric observations for a large number of early-type stars in order to study the occurrence rate, properties, and ultimately the origin of magnetic fields in massive stars. As of July 2014, a total of 98 objects were observed over 20 nights with FORS2 and HARPSpol. Our preliminary results indicate that the fraction of magnetic OB stars with an organised, detectable field is low. This conclusion, now independently reached by two different surveys, has profound implications for any theoretical model attempting to explain the field formation in these objects. We discuss in this contribution some important issues addressed by our observations (e.g., the lower bound of the field strength) and the discovery of some remarkable objects. [less ▲]

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See detailLes acteurs des cultes isiaques et leurs images
Veymiers, Richard ULg

in Gasparini, Valentino; Veymiers, Richard (Eds.) The Agents of Isiac Cults. Proceedings of the VIth International Conference of Isis Studies, Erfurt, May 6-8 2013 – Liège, September 23-24 2013 (in press)

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See detailPronominal gender agreement: a salience-based competition
De Vos, Lien ULg

in Agreement in diachronic perspectives (in press)

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See detailKnowledge Transfer in Regulatory Analytical Sciences through the Implementation of Communities of Practice
Jesionkowska, Joanna; Denis, Brigitte ULg; Taylor, Philip

in Proceedings of the conference (in press)

Promoting affiliation between scientists is relatively easy, but creating larger organisational structures is more difficult, due to traditions of scientific independance, difficulties of sharing implicit ... [more ▼]

Promoting affiliation between scientists is relatively easy, but creating larger organisational structures is more difficult, due to traditions of scientific independance, difficulties of sharing implicit knowledge, and formal organisational barrers. Hence there is a need to research possibilities given by Communities of practice. This paper presents a research projet (doctoral thesis) whose goal is to implement Communities of Practice (CoP) in order to sustain knowledge transfer in regulatory analytical sciences. [less ▲]

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See detailUne approche typo chronologique des charpentes en Europe: de Friedrich Ostendorf à la dendrochronologie
Hoffsummer, Patrick ULg

in L'archéologie des bâtiments en question (in press)

This presentation is talking about the typology and the evolution of different techniques to build roofs wooden frames in Europe from the 11th century to the industrial Revolution. Some regional aspects ... [more ▼]

This presentation is talking about the typology and the evolution of different techniques to build roofs wooden frames in Europe from the 11th century to the industrial Revolution. Some regional aspects such as the type of wood, the lifting process, are described inside this typo chronology established with the help of dendrochronology and international exchanges during a European project "Culture 2000" from 2007 to 2009. [less ▲]

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See detail"Colour ConText". A Database on Colour Practice and Colour Knowledge in Pre-Modern Europe
Neven, Sylvie ULg; Clarke, Mark; Leonhard, Karin et al

in Dubois, Hélène; Eyb-Green, Sigrid; Kroustallis, Stephanos (Eds.) et al Making and transforming art : changes in artists’ materials and practice (in press)

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See detailHis cognitis vs. His cognitis rebus : ordre des constituants et bornage de l’Ablatif absolu
Longrée, Dominique ULg; Philippart de Foy, Caroline ULg; Purnelle, Gérald ULg

in Haverling, Gerd (Ed.) Proceedings of the 16th Int. Coll. on Latin Linguistics, Uppsala, 6-12 juin 2011 (in press)

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See detailMéthodes et outils statistiques pour une étude du lexique de la dépendance chez Pétrone
Longrée, Dominique ULg

in Brunet, Cl (Ed.) Actes du colloque Discours de la dépendance et dépendance du discours dans le Satiricon de Pétrone, 13-14 septembre 2012, Besançon (in press)

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See detailÉtude anatomoradiologique d’un crâne déformé d’Ancón (Pérou)
Ricciardetto, Antonio ULg; Boman, Françoise; Duchat, Florent et al

in Charlier, Philippe (Ed.) Actes du Ve Colloque international de Pathographie (in press)

Matériels et méthodes : l’étude porte sur un crâne déformé provenant d’Ancón au Pérou, inventorié au Muséum National d’Histoire Naturelle (MNHN) de Paris en 1889. L’étude est géographique, historique ... [more ▼]

Matériels et méthodes : l’étude porte sur un crâne déformé provenant d’Ancón au Pérou, inventorié au Muséum National d’Histoire Naturelle (MNHN) de Paris en 1889. L’étude est géographique, historique, macroscopique et tomodensitométrique. Résultats : situé sur la côte à 40 km au nord de Lima, la capitale du Pérou, le site d’Ancón est un site archéologique de la période lithique, et un lieu de sépulture depuis l’époque Chavín (1250 à 250 av. J.-Chr.). Dès l’époque Chavín, les peuples du Pérou ancien construisaient des centres cérémoniels dirigés par une élite théocratique, et déformaient le crâne des enfants dès les premiers jours de la vie, à l’aide de moyens de pression variés. La déformation du crâne d’Ancón est une déformation antéro-postérieure oblique, brachycéphale, bilobée et asymétrique, sans trépanation ni déformation dentaire associée. C’est une variante bilobée du type Huaura de déformation crânienne, qui est associé aux régions de Chancay-Ancón et Lima. L’étude tomodensitométrique des variations d’épaisseur de la voûte, avec amincissement en regard des zones de pression, a montré que la déformation était intentionnelle, et caractérisée par une pression fronto-pariéto-temporale bilatérale surtout antérieure et dégressive d’avant en arrière, associée à une pression frontale, occipitale, et sagittale médiane. En l’absence de contexte et de datation, l’ancienneté du crâne étudié ne peut pas être précisée au long d’une période de presque trois millénaires, jusqu’à la domination Inca et l’arrivée des Espagnols (1532). Le crâne pourrait appartenir à l’une ou l’autre des cultures successives du site d’Ancón : Chavín, Baňos de Boza o Miramar, Lima, Wari, et Chancay (1200 à 1470), dont les céramiques représentent la déformation bilobée. Le crâne est probablement celui d’une femme âgée de plus de 45 ans à son décès, de statut social élevé, faisant partie de l’élite magico-religieuse, politique et économique dirigeante. L’étude de l’endocrâne a permis d’observer la déformation des veines superficielles et des lobes du cerveau. Il existe des signes de parodonpathie chronique à un stade avancé. Un abcès d’origine dentaire pourrait avoir été la cause du décès. Conclusions et perspectives : en ce qui concerne la pratique des déformations crâniennes, la région d’Ancón-Chancay et de Lima paraît être remarquable à trois égards : par le grand nombre de crânes déformés, par le grand nombre de crânes bilobés, et par la proportion importante de femmes, dont on peut supposer qu’elles étaient nées de familles nobles, et destinées dès l’enfance à faire partie de l’élite théocratique. La reconstitution 3D de l’épaisseur de la voûte crânienne a permis pour la première fois à notre connaissance de caractériser ce type de déformation, et pourrait permettre de reconstituer l’appareil déformateur. Seule la reprise des exhumations programmées sur le site d’Ancón, dans le cadre d’un projet prospectif pluridisciplinaire, pourrait permettre de mieux préciser la proportion d’individus à crâne déformé, la proportion des crânes bilobés, et le sex ratio, dans chaque contexte historique et socio-culturel de ce type de déformation crânienne intentionnelle ; et, peut-être, de retrouver in situ l’appareil déformateur correspondant. [less ▲]

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See detailFavorinos d'Arles et ses contemporains : bilinguisme et biculturalisme au IIe siècle apr. J.-C.
Rochette, Bruno ULg

in Marganne, Marie-Hélène; Amato, Eugenio (Eds.) Acte de la Journée d'étude sur Favorinos d'Arles : le payrus du Vatican (Nantes, 14 novembre 2013) (in press)

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See detailFrance et Italie à l'époque du Grand Schisme. La politique par les bannières
Masson, Christophe ULg

in Vaillancourt, Luc; Brun, Jenny (Eds.) Rumeurs, propagande et manipulation de l'opinion publique du XIVe au XVIe siècle. Actes du colloque de Québec, 20-21 mai 2011 (in press)

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See detailLe débat art-industrie dans la deuxième moitié du XIXème siècle en Belgique. Une analyse documentaire
Prina, Daniela ULg

in Actes du Neuvième congrès de l'Association des Cercles francophones d'Histoire et d'Archéologie de Belgique - LVIe Congrès de la Fédération des Cercles d'Archéologie et d'Histoire de Belgique - Liège, 23-26 août 2012 (in press)

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See detailChemical abundances of fast-rotating OB stars
Cazorla, Constantin ULg; Morel, Thierry ULg; Nazé, Yaël ULg et al

in IAU Symposium (in press)

Fast rotation in massive stars is predicted to induce mixing in their interior, but a population of fast-rotating stars with normal nitrogen abundances at their surface has recently been revealed (Hunter ... [more ▼]

Fast rotation in massive stars is predicted to induce mixing in their interior, but a population of fast-rotating stars with normal nitrogen abundances at their surface has recently been revealed (Hunter et al. 2009; Brott et al. 2011, but see Maeder et al. 2014). However, as the binary fraction of these stars is unknown, no definitive statements about the ability of single-star evolutionary models including rotation to reproduce these observations can be made. Our work combines for the first time a detailed surface abundance analysis with a radial-velocity monitoring for a sample of bright, fast-rotating Galactic OB stars to put strong constraints on stellar evolutionary and interior models. [less ▲]

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See detailLe droit de préemption de la France sur le Congo Belge en 1960
Genin, Vincent ULg

in Actes du IXe Congrès de l'Association des Cercles francophones d'Histoire et d'Archéologie de Belgique (in press)

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See detailRamses. An Annotated Corpus of Late Egyptian
Winand, Jean ULg; Polis, Stéphane ULg; Rosmorduc, Serge

in Kousoulis, P. (Ed.) Proceedings of the Xth IAE Congress (Rhodos, 2008) (in press)

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See detail"Ecce ego, mitte me". Antoine Thomas ou le désir des Indes
Delfosse, Annick ULg

in Parmentier, Isabelle; Hermans, Michel (Eds.) De la Belgique à la Chine. Regards croisés à partir d’Antoine Thomas (in press)

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See detailAbundance study of two magnetic B-type stars in the Orion Nebula Cluster
Morel, Thierry ULg

in IAU Symposium 307 (in press)

We present the results of an abundance analysis of two magnetic B-type stars in the Orion Nebula Cluster that support the lack of a direct relationship between the existence of a magnetic field and a ... [more ▼]

We present the results of an abundance analysis of two magnetic B-type stars in the Orion Nebula Cluster that support the lack of a direct relationship between the existence of a magnetic field and a nitrogen excess in the photosphere. [less ▲]

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See detailLe développement d'une multinationale métallurgique liégeoise : la Compagnie Générale des Conduites d'eau (1865-1939)
Destatte, Julien ULg

in Actes du neuvième congrès de l'Association des Cercles francophones d'Histoire et d'Archéologie de Belgique (in press)

The "Compagnie Générale des Conduites d'eau" was an financial and industrial company based in Liège. This article explains briefly how it worked during the periode between its creation in 1865 and 1939.

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See detailAmulettes ou exercices scolaires : sur les difficultés de la catégorisation des papyrus chrétiens
de Haro Sanchez, Magali ULg; Carlig, Nathan ULg

in de Haro Sanchez, Magali (Ed.) Écrire la magie dans l’Antiquité – Scrivere la magia nell’Antichità. Actes du colloque international (Liège, 13-15 octobre 2011) (in press)

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See detailSpazio scritto e spazio non scritto nelle dossografie mediche su papiro
Ricciardetto, Antonio ULg

in Spazio scritto e spazio non scritto nel libro papiraceo: esperienze a confronto (in press)

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See detailIl modello musicale delle chieze nazionali a Roma in epoca barocca: panoramica e nuove prospettive di ricerca
Corswarem, Emilie ULg

in Kubersky-Pirreda, Susanne (Ed.) - (in press)

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See detailVariation de la ponctuation dans une charte originale en double expédition écrite en français à Liège au XIIIe siècle
Mazziotta, Nicolas ULg

in Rochelois, Cécile; Fasseur, Valérie (Eds.) Ponctuer l'œuvre médiévale: des signes au sens (in press)

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See detailStone tool hafting in the Middle Palaeolithic as viewed through the microscope
Rots, Veerle ULg

in Marreiros, Juan; Bicho, Nuno (Eds.) Proceedings of the Use-wear conference at Faro, Portugal (in press)

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See detailFavorinos d'Arles et ses contemporains : bilinguisme et biculturalisme au IIe siècle apr. J.-C.
Rochette, Bruno ULg

in Marganne, Marie-Hélène; Amato, Eugenio (Eds.) Acte de la Journée d'étude sur Favorinos d'Arles : le payrus du Vatican (Nantes, 14 novembre 2013) (in press)

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See detailAffixes transitivisants en français Examen morphologique des données du LVF
Mazziotta, Nicolas ULg; Martin, Fabienne

in Actes du 27e Congrès International de Linguistique et de Philologie Romanes (in press)

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See detailPolitique, Profil et Parcours linguistiques face à la mondialisation universitaire
Defays, Jean-Marc ULg

in Dezutter, Olivier; Borge, Serge (Eds.) Actes du IIIe Forum mondial des centres de langues de l’enseignement supérieur HÉRACLES, "Les Centres de langues et la mise en œuvre des politiques linguistiques" (in press)

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See detailJews and Christians in Late Africa : an hagiographical perspective
Fialon, Sabine ULg

in Lanfranchi, Pierluigi; Verheyden, Joseph (Eds.) Jews and Christians in Late Antiquity (titre provisoire) (in press)

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See detailPhysical modeling of lateral dike breaching due to overtopping
Rifai, Ismail; Erpicum, Sébastien ULg; Archambeau, Pierre ULg et al

in River, Coastal and Estuarine Morphodynamics, RCEM 2015 (2015, August)

Dikes are commonly used as defense structures for river flow channelization, protecting population and property from floods and against lateral riverbed migration. However, the aging of these structures ... [more ▼]

Dikes are commonly used as defense structures for river flow channelization, protecting population and property from floods and against lateral riverbed migration. However, the aging of these structures, combined with their increased vulnerability to extreme hydrological events may cause the dikes to breach, and subsequently to break. Furthermore, statistics show that flow overtopping is the main cause of dike failure, which emphasizes the need to understand thoroughly the process of breaching. Indeed, from a risk management perspective it is particularly important to have a detailed understanding of the mechanisms (e.g. internal erosion, overtopping erosion) underlying the formation of breaches due to overtopping and reliable information on flows passing through them. Conversely, the current knowledge of breaching mechanisms remains fragmented, especially because dike failure involves complex interactions between flows, materials of the structure, soil and foundations. The existing studies have addressed partially these interactions as the considered idealized dikes were generally homogenous, the piping erosion unaccounted for and the overtopping replicated in a dam-break like configuration. Yet, river embankments are subjected to high flow velocities parallel to the direction of the dike and to flow in the floodplain, which highly influence the shape of the breach and its evolution. The objective of the present work is to fill this gap. A laboratory experimental investigation is planned in the National Laboratory for Hydraulics and Environment (LNHE) of EDF R&D (France) and in the research group Hydraulics in Environmental and Civil Engineering (HECE) of the University of Liege (Belgium), reproducing realistic configurations of river dikes, accounting for the tangential flow in both main channel and floodplain. It enables thus the assessment of, on the one hand, the effect of the increase of the water level, and on the other hand, the influence of waves. The laboratory tests also consider the effect of a surface layer and composition of the dike core by testing different material mixtures. Geometry and composition of the idealized dikes are representative of typical field dikes, based on the similarity theory. [less ▲]

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See detailLes corps des scientifiques et de l’intellectuel dans la revue La recherche
Dondero, Maria Giulia ULg

in Havelange, Carl (Ed.) La lettre et l'image (2015, June)

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See detailHighly Luminescent Aqueous Ag2S Quantum Dots as New Generation Quantum Dots
Yağcı Acar, Havva Funda; Hocaoğlu, I.; Demir, F. et al

in Proceediing of the meeting (2015, March 09)

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See detailSuppression of Limit Cycle Oscillations using the Nonlinear Tuned Vibration Absorber
Habib, Giuseppe ULg; Kerschen, Gaëtan ULg

in Proceeding IMAC XXXIII A Conference and Exposition on Structural Dynamics, Orlando 2-5 February 2015 (2015, February 03)

The objective of the present study is to mitigate, or even completely eliminate, the limit cycle oscillations in mechanical systems using a passive nonlinear absorber, termed the nonlinear tuned vibration ... [more ▼]

The objective of the present study is to mitigate, or even completely eliminate, the limit cycle oscillations in mechanical systems using a passive nonlinear absorber, termed the nonlinear tuned vibration absorber (NLTVA). An unconventional aspect of the NLTVA is that the mathematical form of its restoring force is not imposed a priori, as it is the case for most existing nonlinear absorbers. The NLTVA parameters are determined analytically using stability and bifurcation analyses, and the resulting design is validated numerically using the MATCONT software. The proposed developments are illustrated using a Van der Pol-Du ng primary system. [less ▲]

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See detailExperimental modal analysis of nonlinear structures using broadband data
Noël, Jean-Philippe ULg; Renson, Ludovic ULg; Grappasonni, Chiara ULg et al

in Proceedings of the International Modal Analysis Conference (IMAC) XXXIII (2015, February)

The objective of the present paper is to develop a rigorous identification methodology of nonlinear normal modes (NNMs) of engineering structures. This is achieved by processing experimental measurements ... [more ▼]

The objective of the present paper is to develop a rigorous identification methodology of nonlinear normal modes (NNMs) of engineering structures. This is achieved by processing experimental measurements collected under broadband forcing. The use of such a type of forcing signal allows to excite multiple NNMs simultaneously and, in turn, to save testing time. A two-step methodology integrating nonlinear system identification and numerical continuation of periodic solutions is proposed for the extraction of the individual NNMs from broadband input and output data. It is demonstrated using a numerical cantilever beam possessing a cubic nonlinearity at its free end. The proposed methodology can be viewed as a nonlinear generalization of the phase separation techniques routinely utilized for experimental modal analysis of linear structures. The paper ends with a comparison between this new nonlinear phase separation technique and a previously-developed nonlinear phase resonance method. [less ▲]

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See detailBridging the gap between Nonlinear Normal Modes and Modal Derivatives
Sombroek, Cees; Renson, Ludovic ULg; Tiso, Paolo et al

in Proceedings of the International Modal Analysis Conference (IMAC) XXXIII (2015, February)

Nonlinear Normal Modes (NNMs) have a clear conceptual relation to the classical linear normal modes (LNMs), yet they offer a solid theoretical framework for interpreting a wide class of non-linear ... [more ▼]

Nonlinear Normal Modes (NNMs) have a clear conceptual relation to the classical linear normal modes (LNMs), yet they offer a solid theoretical framework for interpreting a wide class of non-linear dynamical phenomena with no linear counterpart. The main difficulty associated with NNMs is that their calculation for large-scale models is expensive, particularly for distributed nonlinearities. Repeated direct time integrations need to be carried out together with extensive sensitivity analysis to reproduce the frequency-energy dependence of the modes of interest. In the present paper, NNMs are computed from a reduced model obtained using a quadratic transformation comprising LNMs and Modal Derivatives (MDs). Previous studies have shown that MDs can capture the essential dynamics of geometrically nonlinear structures and can greatly reduce the computational cost of time integration. A direct comparison with the NNMs computed from another standard reduction technique highlights the capability of the proposed reduction method to capture the essential nonlinear phenomena. The methodology is demonstrated using simple examples with 2 and 4 degrees of freedom. [less ▲]

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See detailExperimental demonstration of a 3D-printed nonlinear tuned vibration absorber
Grappasonni, Chiara ULg; Habib, Giuseppe ULg; Detroux, Thibaut ULg et al

in Proceedings of the International Modal Analysis Conference (IMAC) XXXIII (2015, February)

Engineering structures are designed to be lighter and more flexible, hence reducing the extent of application of linear dynamic models. Concurrently, vibration mitigation is required for enhancing the ... [more ▼]

Engineering structures are designed to be lighter and more flexible, hence reducing the extent of application of linear dynamic models. Concurrently, vibration mitigation is required for enhancing the performance, comfort or safety in real-life applications. Passive linear vibration absorbers are purpose-built, often designed using Den Hartog's equal-peak strategy. However, nonlinear systems are known to exhibit frequency-energy-dependent oscillations which linear absorbers cannot effectively damp out. In this context, the paper introduces a new nonlinear tuned vibration absorber (NLTVA) whose nonlinear functional form is tailored according to the frequency-energy dependence of the nonlinear primary structure. The NLTVA design aims at ensuring equal peaks in the nonlinear receptance function for an as large as possible range of forcing amplitudes, hence generalizing Den Hartog's method to nonlinear systems. Our focus in this study is on experimental demonstration of the NLTVA performance using a primary structure consisting of a cantilever beam with a geometrically nonlinear component at its free end. The absorber is implemented using a doubly-clamped beam fabricated thanks to 3D printing. The NLTVA performance is also compared with that of the classical linear tuned vibration absorber. [less ▲]

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See detailCore-shell AgSiO2-Protoporphyrin IX nanoparticle: Effect of the Ag core on reactive oxygen species generation
Lismont, Marjorie ULg; Pàez Martinez, Carlos ULg; Dreesen, Laurent ULg

in SPIE proceeding - Colloidal Nanoparticles for Biomedical Applications X (2015, February)

Photodynamic therapy (PDT) for cancer is based on the use of a light sensitive molecule to produce, under specific irradiation, toxic reactive oxygen species (ROS). A way to improve the therapy efficiency ... [more ▼]

Photodynamic therapy (PDT) for cancer is based on the use of a light sensitive molecule to produce, under specific irradiation, toxic reactive oxygen species (ROS). A way to improve the therapy efficiency is to increase the amount of produced ROS near cancer cells. This aim can be achieved by using a metal enhanced process arising when an optically active molecule is located near a metallic nanoparticle (NP). Here, the coupling effect between silver (Ag) NPs and protoporphyrin IX (PpIX) molecules, a clinically approved photosensitizer, is studied compared first, to PpIX fluorescence yield and second, to ROS production efficiency. By applying a modified Stöber process, PpIX was encapsulated into a silica (SiO2) shell, surrounding a 60 nm sized Ag core. We showed that, compared to SiO2-PpIX NPs, Ag coated SiO2-PpIX NPs dramatically decreased PpIX fluorescence together with singlet oxygen production efficiency. However, after incubation time in the dark, the amount of superoxide anions generated by the Ag doped sample was higher than the control sample one. [less ▲]

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See detailExperimental nonlinear identification of an aircraft with bolted connections
De Filippis, Giovanni; Noël, Jean-Philippe ULg; Kerschen, Gaëtan ULg et al

in Proceedings of the International Modal Analysis Conference (IMAC) XXXIII (2015, February)

Aircraft structures are known to be prone to nonlinear phenomena, especially as they constantly become lighter and hence more flexible. One specific challenge that is regularly encountered is the modeling ... [more ▼]

Aircraft structures are known to be prone to nonlinear phenomena, especially as they constantly become lighter and hence more flexible. One specific challenge that is regularly encountered is the modeling of the mounting interfaces between aircraft subcomponents. Indeed, for large amplitudes of vibration, such interfaces may loosen and, in turn, trigger complex mechanisms such as friction and clearances. In this context, the present work intends to investigate the nonlinear dynamics of the Morane–Saulnier Paris aircraft, accessible at ONERA. This aircraft possesses multiple bolted connections between two external fuel tanks and wing tips. The objective of the paper is specifically to carry out an adequate identification of the numerous nonlinearities affecting the dynamics of this full-scale structure. Nonlinearity detection and the subsequent subspace-based parameter estimation have been performed on experimental data, collected during an on-ground test campaign. Nonlinearity detection is first achieved by the comparison of frequency response functions estimated at low excitation level, with those obtained at high amplitude level, yielding insight towards accurately characterizing the behavior of the bolted connections. Then, a nonlinear subspace identification method is applied to measured data to estimate the linear and nonlinear parameters of the structure and novel strategies and tools that overcome specific arisen problems are developed. [less ▲]

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See detailAntoine Galland et l'épigraphie
Famerie, Etienne ULg

in Bauden, Frédéric; Waller, Richard (Eds.) Colloque international A. Galland (2015, February)

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See detailUsing shear strain localisation to model the fracturing around gallery in unsaturated Callovo-Oxfordian claystone
Pardoen, Benoît ULg; Levasseur, Séverine ULg; Collin, Frédéric ULg

in Chau, Kam Tim; Zhao, Jidong (Eds.) Bifurcation and Degradation of Geomaterials in the New Millennium (2015, January 28)

Galleries drilling leads to damage propagation, fracturing and properties modifications in the surrounding medium. The prediction of the damaged zone behaviour is an important matter and needs to be ... [more ▼]

Galleries drilling leads to damage propagation, fracturing and properties modifications in the surrounding medium. The prediction of the damaged zone behaviour is an important matter and needs to be properly assessed. To do so the fractures can be modelled using shear strain localisation. The coupled local second gradient model is used under unsaturated conditions to correctly model the strain localisation behaviour. The permeability evolution and the rock desaturation due to air ventilation in galleries are considered. Finally, a hydro-mechanical modelling of a gallery excavation in Callovo-Oxfordian claystone is performed leading to a fairly good representation of the damaged zone. [less ▲]

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See detailProduction of extracellular polysaccharide by Enterobacter A47 using cheese whey as the sole carbon source
Antunes, S.; Alves, V.D.; Grandfils, Christian ULg et al

in Proceeding of the meeting (2015, January 19)

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See detailCharacterization of the chitin-glucan complex extracted from Komagataella pastoris cell wall
Farinha, I.; Duarte, P.; Pimentel et al

in Proceeding of the meeting (2015, January 19)

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See detailErosion and sedimentation issues in a hydropower project: assessing impacts and opportunities
Dewals, Benjamin ULg; Erpicum, Sébastien ULg; Archambeau, Pierre ULg et al

in Schüttrumpf, Holger (Ed.) Offene Gewässer: Strahlwirkung, Fischaufstieg, Fischabstieg, Sedimente, Schadstoffe (2015, January 09)

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See detailAn X-ray surprise in a magnetic pulsator
Nazé, Yaël ULg

in IAU Symposium (2015, January 01)

ξ[SUP]1[/SUP] CMa is a rare β Cep star with a strong magnetic field. To gain new insight on this object, a dedicated campaign using XMM-Newton was performed. These data reveal a new type of variations, X ... [more ▼]

ξ[SUP]1[/SUP] CMa is a rare β Cep star with a strong magnetic field. To gain new insight on this object, a dedicated campaign using XMM-Newton was performed. These data reveal a new type of variations, X-ray pulsations, posing a new challenge to our understanding of stellar winds. [less ▲]

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See detailThe X-ray properties of magnetic massive stars
Nazé, Yaël ULg; Petit, Véronique; Rinbrand, Melanie et al

in IAU Symposium (2015, January 01)

Early-type stars are well-known to be sources of soft X-rays. However, this high-energy emission can be supplemented by bright and hard X-rays when magnetically confined winds are present. In an attempt ... [more ▼]

Early-type stars are well-known to be sources of soft X-rays. However, this high-energy emission can be supplemented by bright and hard X-rays when magnetically confined winds are present. In an attempt to clarify the systematics of the observed X-ray properties of this phenomenon, a large series of Chandra and XMM observations was analyzed, over 100 exposures of 60% of the known magnetic massive stars listed recently by Petit et al. (2013). It is found that the X-ray luminosity is strongly correlated with mass-loss rate, in agreement with predictions of magnetically confined wind models, though the predictions of higher temperature are not always verified. We also investigated the behaviour of other X-ray properties (absorption, variability), yielding additional constraints on models. This work not only advances our knowledge of the X-ray emission of massive stars, but also suggests new observational and theoretical avenues to further explore magnetically confined winds. [less ▲]

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See detailPourquoi la théorie de la connaissance a besoin de la psychologie: les arguments de Stumpf
Dewalque, Arnaud ULg

in Gyemant, Maria (Ed.) Psychologie et psychologisme (2015, January)

Mon objectif est double. Il s’agira, d’une part, de retracer la position de Carl Stumpf face à la querelle du psychologisme (lectures psychologistes de Kant vs lectures antipsychologistes néokantiennes ... [more ▼]

Mon objectif est double. Il s’agira, d’une part, de retracer la position de Carl Stumpf face à la querelle du psychologisme (lectures psychologistes de Kant vs lectures antipsychologistes néokantiennes) et, d’autre part, d’en tirer quelques implications d’allure très générale concernant la place qu’il convient de réserver aux considérations psychologiques en philosophie. Je suggérerai: (1) que Stumpf adopte une voie médiane entre psychologisme et antipsychologisme, (2) que cette voie médiane est représentative de l'orientation philosophique de Brentano et de son école, (3) qu'elle débouche sur une conception fine des rapports entre philosophie (en particulier théorie de la connaissance) et psychologie: la théorie de la connaissance a besoin de la psychologie, sans être à proprement parler "fondée" sur elle. [less ▲]

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See detailModelling Hydromechanical Dilation Geomaterial—Cavitation and Localization
Sieffert, Y.; Buzzi, O.; Collin, Frédéric ULg et al

in Chau, Kam Tim; Zhao, Jidong (Eds.) Bifurcation and Degradation of Geomaterials in the New Millennium (2015, January)

This paper presents an extension of the local second gradient model to multiphasic materials (solid particles, air, water) and including the cavitation phenomenon. This new development was made in order ... [more ▼]

This paper presents an extension of the local second gradient model to multiphasic materials (solid particles, air, water) and including the cavitation phenomenon. This new development was made in order to model the response of saturated dilatant materials under deviatoric stress and undrained conditions and possibly, in future, the behaviour of unsaturated soils [less ▲]

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See detailLes frontières du droit à l'épreuve des films de mafias
Thirion, Nicolas ULg; Pasteger, David ULg

in Flores-Lonjou, Magalie (Ed.) Frontière(s) au cinéma - Actes des septièmes rencontres "Droit et cinéma" (2015)

demander dans quelle mesure l’injonction du brigand qui exige « la bourse ou la vie ! » peut être comparée à la norme de comportement édictée par un Etat sous la forme d’une loi, c’est poser la ... [more ▼]

demander dans quelle mesure l’injonction du brigand qui exige « la bourse ou la vie ! » peut être comparée à la norme de comportement édictée par un Etat sous la forme d’une loi, c’est poser la sempiternelle question de la frontière qui sépare le droit du non-droit, tout au moins dans une perspective juspositiviste, en tant que cette école de théorie du droit refuse de définir le phénomène juridique en se référant à une valeur ou un ensemble de valeurs. La frontière du droit et du non-droit est en effet particulièrement difficile à tracer, nonobstant plusieurs siècles de discussions philosophiques à ce sujet. Lorsque, fatigué de parcourir les chemins, le brigand décide de s’installer en ville pour s’y adonner au racket des commerçants du quartier et qu’il s’adjoint ensuite le concours d’autres bandits, c’est un gang de malfaiteurs qui voit le jour. Si, ultérieurement, ce gang se concerte avec d’autres bandes de truands pour s’épauler mutuellement dans les exactions auxquelles ils se livrent sur leurs territoires respectifs, il prend alors la forme d’une organisation criminelle ou, au sens large du terme, d’une « mafia ». Le cinéma de Francis Ford Coppola, Martin Scorsese, Brian De Palma, Sergio Leone ou bien encore Matteo Garrone, entre autres, dépeint, souvent avec réalisme, la genèse et le fonctionnement de telles organisations criminelles. La communication a proposé, au moyen d’illustrations tirées des films de ces grands cinéastes, une analyse de microscopie juridique du crime organisé. Une description serrée de la particule élémentaire du phénomène juridique, identifiée par Lucien François dans son ouvrage de théorie du droit Le cap des Tempêtes sous l’appellation de « jurème », met en lumière une indéniable proximité entre les techniques de pouvoir utilisées respectivement par le brigand isolé, la bande organisée et l’Etat souverain. En remontant ensuite vers la structure plus complexe d’un système étatique, on se demandera si, en fin de compte, dans la vision juspositiviste poussée au bout de sa logique par Lucien François, l’Etat ne pourrait être réduit, d’un point de vue ontologique, à un pouvoir de fait comparable, par les techniques de contrainte qu’il exerce sur ses sujets, à une organisation criminelle – abstraction faite des valeurs promues ou poursuivies par tel ou tel appareil étatique. [less ▲]

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See detailSignes et corrections dans le P.Vat. gr. 11v - Favorinos, De exsilio
Macedo, Gabriel ULg

in Marganne, Marie-Hélène; Amato, Eugenio (Eds.) Entre papyrologie, philologie et littérature. Autour du traité "Sur l'Exil" de Favorinos d'Arles. Actes de la journée d'études, Nantes 13-11-2013 (2015)

A study of scribal practices, signs and corrections on the only known copy of Favorinos' De exsilio.

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See detailAntoninos de Cos, les lophoura et les soins vétérinaires
Marganne, Marie-Hélène ULg

in Doyen-Higuet, Anne-Marie; Van den Abeele, Baudouin (Eds.) Chevaux, chiens, faucons. L’art vétérinaire antique et médiéval à travers les sources écrites, archéologiques et iconographiques (Louvain-La-Neuve, 24-26 mars 2011) (2015)

Poursuivant les recherches ébauchées à propos d'Antoninos de Cos, dont le nom apparaît, à propos de soins vétérinaires, dans un papyrus grec daté du début du IIIe siècle de notre ère réédité récemment par ... [more ▼]

Poursuivant les recherches ébauchées à propos d'Antoninos de Cos, dont le nom apparaît, à propos de soins vétérinaires, dans un papyrus grec daté du début du IIIe siècle de notre ère réédité récemment par nos soins (Matière médicale ou doxographie ? Révision de PSI inv. 3011 [MP3 2388], dans V. Boudon-Millot – A. Garzya – J. Jouanna & A. Roselli (éd.), Histoire de la tradition et édition des médecins grecs. Actes du VIe Colloque international, Paris, 12-14 avril 2008, Napoli, 2010, pp. 43-59 [Collectanea, 27]), on s'attache à rassembler les fragments qui pourraient être attribués à cet auteur, qu'ils relèvent de la médecine humaine ou vétérinaire, à retracer tant leur contexte chronologique que les étapes de leur transmission, à analyser leur contenu et à définir enfin leur apport à la connaissance de l'art vétérinaire antique et de son expression écrite. [less ▲]

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See detailAnalytic solution for the relative motion of satellites in near-circular low-Earth orbits
Martinusi, Vladimir ULg; Dell'Elce, Lamberto ULg; Kerschen, Gaëtan ULg

in Proceedings of the AAS/AIAA Space FLight Mechanics Meeting (2015)

The paper presents the solution to the problem of the relative motion between two satellites orbiting Earth under the influence of the oblateness and atmospheric drag perturbations. Starting from the ... [more ▼]

The paper presents the solution to the problem of the relative motion between two satellites orbiting Earth under the influence of the oblateness and atmospheric drag perturbations. Starting from the analytic solution to the problem of the absolute motion, the closed-form equations of motion are obtained. No simplifying assumptions are made on the relative dynamics. [less ▲]

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See detailInvolvement of the Distinctiveness Heuristic in Children's Decision Making
Geurten, Marie ULg; Willems, Sylvie ULg; Meulemans, Thierry ULg

in International Convention of Psychological Science: ICPS, Amsterdam 2015 (2015)

Over the past decades, researchers studying adult metacognition have placed a heavy emphasis on how expectations and naïve theories about memory functioning can improve memory accuracy through the ... [more ▼]

Over the past decades, researchers studying adult metacognition have placed a heavy emphasis on how expectations and naïve theories about memory functioning can improve memory accuracy through the implementation of some metacognitive rules. By contrasts, however, research on metacognition in children has only recently started to pay attention to the influence of these heuristic-based judgments on decision making. Generally, the results of these studies indicate that memory decisions are already based on some heuristics by the ages of 7-8 years. Thus far, the question of whether younger children can do the same has widely gone unexamined. The present experiment investigates whether young children are able to reduce their false recognitions rate after distinctive encoding through the implementation of a strategic metacognitive rule. Specifically, we examine the use of a retrieval strategy called the distinctiveness heuristic whereby people infer that an event has not occurred when they cannot remember expected memorial information about it. Seventy-two children, aged 4, 6, and 9 years, studied two lists of unrelated items. One of these lists was visually displayed (picture/dictinctive condition) while the other was presented auditorily (word/no-distinctive condition). After each study phase, participants completed recognition tests. Finally, they answered questions about their explicit knowledge of the distinctive-encoding effect. The results revealed that even the youngest children in our sample showed a smaller proportion of intrusions in the picture condition than in the word condition. Furthermore, the findings of the signal detection analyses are consistent with the hypothesis that the lower rate of false recognitions after picture encoding results from the implementation of a conservative response criterion based on the participants’ metacognitive expectations (distinctiveness heuristic). Moreover, the absence of correlation between children’s explicit knowledge of the distinctiveness rule and their effective use of this metacognitive heuristic seems to indicate that its involvement in memory decisions could be mediated by implicit mechanisms. [less ▲]

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See detailSignes et corrections dans le P.Vat. gr. 11v - Favorinos, De exsilio
Macedo, Gabriel ULg

in Marganne, Marie-Hélène; Amato, Eugenio (Eds.) Entre papyrologie, philologie et littérature. Autour du traité "Sur l'Exil" de Favorinos d'Arles. Actes de la journée d'études, Nantes 13-11-2013 (2015)

A study of scribal practices, signs and corrections on the only known copy of Favorinos' De exsilio.

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See detailLa ‘Commendatio animæ’ dans les littératures romanes des origines
Valenti, Gianluca ULg

in Draelants, Isabelle; Balouzat-Loubet, Christelle (Eds.) La formule au Moyen Âge, II / Formulas in Medieval Culture, II. Actes du colloque international / Proceedings of the International Conference (2015)

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See detailValidation and test cases for a free surface PSH model
Goffin, Louis ULg; Erpicum, Sébastien ULg; Dewals, Benjamin ULg et al

in Advances in hydroinformatics - Simhydro 2014 (2015)

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See detailCombining satellite, aerial and ground measurements to assess forest carbon stocks in Democratic Republic of Congo
Beaumont, Benoît; Bouvy, Alban; Stephenne, Nathalie et al

in Geophysical Research Abstracts, Vol. 17, EGU2015-4765-2, 2015 (2015)

Monitoring tropical forest carbon stocks changes has been a rising topic in the recent years as a result of REDD+ mechanisms negotiations. Such monitoring will be mandatory for each country willing to ... [more ▼]

Monitoring tropical forest carbon stocks changes has been a rising topic in the recent years as a result of REDD+ mechanisms negotiations. Such monitoring will be mandatory for each country willing to benefit from these financial incentives in the future. Aerial and satellite remote sensing technologies offer cost advantages in implementing large scale forest inventories. Despite the recent progress made in the use of airborne LiDAR for C stocks estimation, no widely operational and cost effective method has yet been delivered for central Africa forest monitoring. Within the Maï Ndombe region of DRC, the EO4REDD project develops a method combining satellite, aerial and ground measurements. This combination is done in three steps: [1] mapping and quantifying forest cover changes using an object-based semi-automatic change detection (deforestation and forest degradation) methodology based on very high resolution satellite imagery (RapidEye), [2] developing an allometric linear model for above ground biomass measurements based on dendrometric parameters (tree crown areas and heights) extracted from airborne stereoscopic image pairs and calibrated using ground measurements of individual trees on a data set of 18 one hectare plots and [3] relating these two products to assess carbon stocks changes at a regional scale. Given the high accuracies obtained in [1] (> 80% for deforestation and 77% for forest degradation) and the suitable, but still to be improved with a larger calibrating sample, model (R2 of 0.7) obtained in [2], EO4REDD products can be seen as a valid and replicable option for carbon stocks monitoring in tropical forests. Further improvements are planned to strengthen the cost effectiveness value/REDD+ suitability in the 2nd phase of EO4REDD. This 2nd phase will include [A] specific model developments per forest type; [B] measurements of afforestation, reforestation and natural regeneration processes and [C] study of Sentinel data series potential use. [less ▲]

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See detailGIS-Based Landslide Susceptibility Mapping in the Great Lakes Region of Africa, Case Study of Bujumbura Burundi
Nibigira, L.; Draidia, Salah ULg; Havenith, Hans-Balder ULg

in Engineering Geology for Society and Territory-Volume 2 (2015)

Abstract: Landslides in Central Africa represent a constant threat to the population. The present work took its motivation from the increasing number of recorded incidents in recent times. It is focused ... [more ▼]

Abstract: Landslides in Central Africa represent a constant threat to the population. The present work took its motivation from the increasing number of recorded incidents in recent times. It is focused on the analysis of mass movements in a regional context. Remote sensing based on the use of satellite images (Pleiades images of 2011) and aerial photographs (1957, 1958 and 1981) allowed us to identify instabilities at different scales. The study of these mass movements and the characterization of the processes governing ... [less ▲]

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See detailLandslide Susceptibility Mapping with Data Mining Methods—a Case Study from Maily-Say, Kyrgyzstan
Braun, A.; Fernandez-Steeger, T.; Havenith, Hans-Balder ULg et al

in Engineering Geology for Society and Territory-Volume 2 (2015)

Abstract: Multiple factors, such as geology, high mountain topography, seismic activity, climatic conditions and mining activities cause significant landslide hazard in the region around Maily-Say ... [more ▼]

Abstract: Multiple factors, such as geology, high mountain topography, seismic activity, climatic conditions and mining activities cause significant landslide hazard in the region around Maily-Say, Kyrgyzstan. To assess the landslide susceptibility a database containing landslide information and geological, morphological and hydrological parameters associated with landslide occurrence was established and analyzed with different data mining algorithms. The most promising results were achieved with an Artificial Neural ... [less ▲]

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See detailThe Harmonic Balance Method for Bifurcation Analysis of Nonlinear Mechanical Systems
Detroux, Thibaut ULg; Renson, Ludovic ULg; Masset, Luc ULg et al

in Proceedings of the SEM IMAC XXXIII (2015)

Because nowadays structural engineers are willing to use or at least understand nonlinearities instead of simply avoiding them, there is a need for numerical tools performing analysis of nonlinear large ... [more ▼]

Because nowadays structural engineers are willing to use or at least understand nonlinearities instead of simply avoiding them, there is a need for numerical tools performing analysis of nonlinear large-scale structures. Among these techniques, the harmonic balance (HB) method is certainly one of the most commonly used to study finite element models with reasonably complex nonlinearities. However, in its classical formulation the HB method is limited to the approximation of periodic solutions. For this reason, the present paper proposes to extend the method to the detection and tracking of codimension-1 bifurcations in the system parameters space. As an application, the frequency response of a spacecraft is studied, together with two nonlinear phenomena, namely quasiperiodic oscillations and detached resonance curves. This example illustrates how bifurcation tracking using the HB method can be employed as a promising design tool for detecting and eliminating such undesired behaviors. [less ▲]

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See detailHazard and Risk Related to Earthquake-Triggered Landslides
Havenith, Hans-Balder ULg; Fan, X.; Torgoev, A.

in Engineering Geology for Society and Territory-Volume 2 (2015)

Abstract This paper first analyses how important earthquake-induced landslide hazards are compared to other geohazards at world-wide scale. Further, we will outline where these hazards may have the ... [more ▼]

Abstract This paper first analyses how important earthquake-induced landslide hazards are compared to other geohazards at world-wide scale. Further, we will outline where these hazards may have the strongest impacts—at regional and local scale. In this regard, we consider the short-and long-term effects of geological, tectonic, climatic and morphological conditions. Hazard and risk related to these processes will also be analysed on the basis of a series of case histories: eg, the 1920 Haiyuan earthquake-landslide disaster in China. A ... [less ▲]

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See detailLe Transport de marchandises et de personnes sur le Nil en 823 A.H./1420 È.C.
Bauden, Frédéric ULg

in Schubert, Alexander T.; Sijpesteijn, Petra M. (Eds.) Documents and the History of the Early Islamic World (2015)

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See detailNavigating the uncertain seas of controversies – A pedagogical wind rose
Verpoorten, Dominique ULg

in Melard, François; Stassart, Pierre M (Eds.) Proceedings of the International Interdisciplinary Working Conference "Teaching complexity and uncertainty on Environmental Issues - Practices, Theories and Products" (2014, December 23)

The Arlon conference brought together lecturers willing to share and discuss aspects of their practice of “controversies”, seen as a teaching/learning method suited to the contextual needs and demands of ... [more ▼]

The Arlon conference brought together lecturers willing to share and discuss aspects of their practice of “controversies”, seen as a teaching/learning method suited to the contextual needs and demands of higher education environmental studies. The paper contributes to this joint reflective effort by providing conceptual tools helping to interpret the practice, to question what it puts at stake and to detect, from a pedagogical viewpoint, key issues and upcoming questions. The contribution falls within the Conference's aim n°2: “share theories or conceptual propositions that make it possible to equip the teaching approaches and to give them theoretical and methodological foundations” (Program Arlon Conference 2014, p. 2). The article takes a traditional stance, looking at the contributions to the conference through “constructive alignment”(Biggs, 1996), a basic principle meant to secure the pedagogical validity of any given learning situation by establishing a triple consistency (Kovertaite & Leclercq, 2006; Leclercq, 1995; Petit, Castaigne, & Verpoorten, 2007; Tyler, 1949) between objectives, methods and assessment. [less ▲]

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See detailEnvironmental changes in developing countries: from moving to trapped populations
Ozer, Pierre ULg; De Longueville, Florence ULg; Zickgraf, Caroline ULg et al

in Young Researchers Overseas' Day - Book of Abstracts (2014, December 16)

Over the last decades, environmental changes driven and/or compounded by population pressures and climate change have dramatically impacted human mobility, including population displacements or migration ... [more ▼]

Over the last decades, environmental changes driven and/or compounded by population pressures and climate change have dramatically impacted human mobility, including population displacements or migration, especially in developing countries. Slow onset degradation processes (aridification, desertification, wind and water erosion, deforestation, shoreline erosion, etc.) and sudden disasters (extreme climate events such as floods, droughts, storms, heat waves, etc.) have intensified since the 1950s in terms of frequency, intensity and duration, as well as in their socio-economic consequences. In the absence of an international objective to reduce greenhouse gas emissions, global warming and its wide range of negative impacts are not likely to be contained in the future [...] [less ▲]

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See detailProgramme de revalidation multidisciplinaire post-cancer du sein : analyse des bénéfices éventuels sur la fonction physique et la qualité de vie
LECLERC, Anne-France ULg; FOIDART-DESSALLE, Marguerite ULg; COUCKE, Philippe ULg et al

in AFPSA - 8e congrès francophone, Psychologie de la Santé - Evolutions sociales, innovations & politiques - Résumé des communications (2014, December 16)

Introduction : Le cancer du sein ainsi que ses traitements sont à l'origine de nombreux effets secondaires indésirables. L'objectif de l'étude est de déterminer les bénéfices éventuels, tant sur le plan ... [more ▼]

Introduction : Le cancer du sein ainsi que ses traitements sont à l'origine de nombreux effets secondaires indésirables. L'objectif de l'étude est de déterminer les bénéfices éventuels, tant sur le plan physique que psychologique, d’un programme de revalidation multidisciplinaire chez des femmes ayant été traitées pour un cancer du sein. Méthodologie : 122 patientes ont été recrutées, 61 faisant partie du groupe contrôle et 61 du groupe traité. Celui-ci a bénéficié d’une revalidation de trois mois comprenant un entraînement physique supervisé et diverses sessions psycho-éducatives. Les évaluations, effectuées avant et après la prise en charge, ont inclus des mesures anthropométriques et de composition corporelle, une évaluation des capacités fonctionnelles et différents questionnaires. Résultats : Au terme des trois mois, l’état de santé (qualité de vie), le rôle fonctionnel, l’état émotionnel et les fonctions physiques, cognitives et sociales s’améliorent significativement au sein du groupe traité. Cette observation s’applique également aux symptômes de fatigue, d'insomnie, de douleur, de dyspnée, de perte d'appétit, d’anxiété et de dépression ainsi qu'aux paramètres physiques obtenus par l'intermédiaire des évaluations fonctionnelles. Au sein du groupe contrôle, ces améliorations n’apparaissent pas et une augmentation significative de l'indice de masse corporelle et du pourcentage de graisse corporelle est observée. Conclusion : Cette étude préliminaire montre ainsi la faisabilité et les effets bénéfiques d’une prise en charge multidisciplinaire chez des femmes au terme de leurs traitements pour le cancer du sein. [less ▲]

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See detailDevelopment and validation of a 3D kinematic-based method for determining gait events during overground walking
Boutaayamou, Mohamed ULg; Schwartz, Cédric ULg; Denoël, Vincent ULg et al

in IEEE International Conference on 3D Imaging (IC3D) (2014, December 09)

A new signal processing algorithm is developed for quantifying heel strike (HS) and toe-off (TO) event times solely from measured heel and toe coordinates during overground walking. It is based on a rough ... [more ▼]

A new signal processing algorithm is developed for quantifying heel strike (HS) and toe-off (TO) event times solely from measured heel and toe coordinates during overground walking. It is based on a rough estimation of relevant local 3D position signals. An original piecewise linear fitting method is applied to these local signals to accurately identify HS and TO times without the need of using arbitrary experimental coefficients. We validated the proposed method with nine healthy subjects and a total of 322 trials. The extracted temporal gait events were compared to reference data obtained from a force plate. HS and TO times were identified with a temporal accuracy ± precision of 0.3 ms ± 7.1 ms, and –2.8 ms ± 7.2 ms in comparison with reference data defined with a force threshold of 10 N. This algorithm improves the accuracy of the HS and TO detection. Furthermore, it can be used to perform stride-by-stride analysis during overground walking with only recorded heel and toe coordinates. [less ▲]

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See detailEvidence based medicine - Tendon and platelet-rich plasma (PRP)
Kaux, Jean-François ULg

in Annual Congress RSBPRM (2014, December 06)

Platelets have known roles in coagulation, inflammatory processes, and immunity modulation; they also have ‘‘restorative’’ properties. Indeed, during degranulation, platelets release different cytokines ... [more ▼]

Platelets have known roles in coagulation, inflammatory processes, and immunity modulation; they also have ‘‘restorative’’ properties. Indeed, during degranulation, platelets release different cytokines and growth factors (VEGF, PDGF, TGF-B, IGF-I, and HGF) that promote angiogenesis, tissue remodeling (bone, skin, muscle, tendon, etc.), and wound healing. PRP is obtained by centrifuging autologous blood to obtain a concentration of platelets, usually between 3 and 10 times that of whole blood, depending on the isolation method. For this reason, different PRP preparation techniques cannot provide a consistently identical final product, but there is currently no international consensus on this issue. Overall, PRP could be an attractive therapeutic option for treating chronic musculoskeletal conditions, such as tendinopathy or plantar fasciitis. Tendons do not have a high metabolic index. Growth factors released by platelets promote tenocyte proliferation, stimulate angiogenesis and have analgesic properties. Thus it could stimulate and accelerate tissue regeneration in animal models. In addition to PRP, optimal tissue quality requires the application of mechanical loads. PRP should be considered for chronic tendinopathies. Indeed, the goal is to initiate an acute inflammatory reaction that quickly moves on to the proliferative phase that involves collagen synthesis. The latter is necessary for appropriate tendon healing. PRP should therefore not be used for acute tendinitis or tenosynovitis. Even if most of the preclinical studies showed that PRP stimulates the tendon healing process, clinical series remain more controversial. Based on literature and our clinical experience, we suggest some ideas for improving this treatment. Optimization of the technique for collecting the PRP is paramount. Different risk factors must be corrected before infiltration, and chronic tendinopathies must be carefully selected. Finally, post-infiltration rehabilitation remains absolutely necessary. Standardisation of the use of PRP remains necessary in order to optimise the results. [less ▲]

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See detailConverging to and escaping from the global equilibrium: Isostables and optimal control
Mauroy, Alexandre ULg

in Proceedings of the 53rd IEEE Conference on Decision and Control (2014, December)

This paper studies the optimal control of trajectories converging to or escaping from a stable equilibrium. The control duration is assumed to be short. When the control is turned off, the trajectories ... [more ▼]

This paper studies the optimal control of trajectories converging to or escaping from a stable equilibrium. The control duration is assumed to be short. When the control is turned off, the trajectories have not reached the target and they subsequently evolve according to the free motion dynamics. In this context, we show that the problem can be formulated as a finite-horizon optimal control problem which relies on the notion of isostables. For linear and nonlinear systems, we solve this problem using Pontryagin’s maximum principle and we study the relationship between the optimal solutions and the geometry of the isostables. Finally, optimal strategies for choosing the magnitude and duration of the control are considered. [less ▲]

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See detailMotor control and low back pain in elite soccer players
GROSDENT, Stéphanie ULg; Demoulin, Christophe ULg; Namurois, Guy et al

in Abstract Book of 7th Biennial Congress of The Belgian Back Society (2014, December)

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See detailIgE antibodies and FceRI are critical components of protective type 2 immunity against honeybee and russell's viper venom in mice
Starkl, Philipp; Marichal, Thomas ULg; Reber, Laurent L. et al

in Proceedings of the Type 2 Cell Symposium - Brugge (2014, December)

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See detailA physically motivated pixel-based model for background subtraction in 3D images
Braham, Marc ULg; Lejeune, Antoine ULg; Van Droogenbroeck, Marc ULg

in International Conference on 3D Imaging (IC3D) (2014, December)

This paper proposes a new pixel-based background subtraction technique, applicable to range images, to detect motion. Our method exploits the physical meaning of depth information, which leads to an ... [more ▼]

This paper proposes a new pixel-based background subtraction technique, applicable to range images, to detect motion. Our method exploits the physical meaning of depth information, which leads to an improved background/foreground segmentation and the instantaneous suppression of ghosts that would appear on color images. In particular, our technique considers certain characteristics of depth measurements, such as failures for certain pixels or the non-uniformity of the spatial distribution of noise in range images, to build an improved pixel-based background model. Experiments show that incorporating specificities related to depth measurements allows us to propose a method whose performance is increased with respect to other state-of-the-art methods. [less ▲]

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See detailEvaluation of pairwise calibration techniques for range cameras and their ability to detect a misalignment
Lejeune, Antoine ULg; Grogna, David ULg; Van Droogenbroeck, Marc ULg et al

in International Conference on 3D Imaging (IC3D) (2014, December)

Many applications require the use of multiple cameras to cover a larger volume. In this paper, we evaluate several pair-wise calibration techniques dedicated to range cameras. We compare the precision of ... [more ▼]

Many applications require the use of multiple cameras to cover a larger volume. In this paper, we evaluate several pair-wise calibration techniques dedicated to range cameras. We compare the precision of a self-calibration technique based on the movement in front of the cameras to object based calibration. While the self-calibration method is less precise than its counterparts, it yields a first estimation of the transformation between the cameras and permits to detect when the cameras become mis-aligned. Therefore it is useful in a practical situations. [less ▲]

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See detailPathology. What is found in patients that are referred for further investigations ?
TOMASELLA, Marco ULg

in Abstract Book Neck complaints. A 360° view. (2014, November 29)

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See detailEstimating Ventricular Stroke Work from Aortic Pressure Waveform
Kamoi, Shun; Pretty, Christopher; Chiew, Yeong Shiong et al

in 13th Belgian Day on Biomedical Engineering (2014, November 28)

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See detailTracking stressed blood volume during vascular filling experiments
Pironet, Antoine ULg; Dauby, Pierre ULg; Chase, J. Geoffrey et al

in 13th Belgian Day on Biomedical Engineering (2014, November 28)

A three-chamber cardiovascular system model is used to compute stressed blood volume from filling experiments. As previously observed, stressed blood volume is a good predictor of the change in cardiac ... [more ▼]

A three-chamber cardiovascular system model is used to compute stressed blood volume from filling experiments. As previously observed, stressed blood volume is a good predictor of the change in cardiac output after fluid infusion. [less ▲]

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See detailIsocinétisme et tendinopathies
Croisier, Jean-Louis ULg; Kaux, Jean-François ULg; Crielaard, Jean-Michel ULg et al

in Abstract Book des XVIèmes Rencontres isocinétiques de Médimex (2014, November 28)

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See detailEvaluation de la fatigue musculaire des membres supérieurs
Forthomme, Bénédicte ULg; Kaux, Jean-François ULg; Crielaard, Jean-Michel ULg et al

in Abstract Book des XVIèmes Rencontres isocinétiques de Médimex (2014, November 28)

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See detailIn vitro hemocompatibility assessment of Near-IR-Emitting Ag2S Quantum Dots (QD)
Grandfils, Christian ULg; Hocaoglu, I.; Demir, F. et al

in Proceeding of the Nanobiotechnology International Workshop (2014, November 26)

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See detailDesign and implementation of a T impedance matching network for the radiocommunication subsystem aboard the OUFTI-1 nanosatellite
Boutaayamou, Mohamed ULg; Crosset, Nicolas ULg; Werner, Xavier ULg et al

in Proceedings of the URSI Forum 2014 (2014, November 18)

We describe how we handled an unexpected impedance matching issue on the receiver side (at UHF) of the radiocommunication system aboard the OUFTI-1 nanosatellite of the University of Liège. Our approach ... [more ▼]

We describe how we handled an unexpected impedance matching issue on the receiver side (at UHF) of the radiocommunication system aboard the OUFTI-1 nanosatellite of the University of Liège. Our approach relied on a combination of novel analytical developments combined with experimentation. [less ▲]

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See detailDISTRIBUTION OF CAPSULAR POLYSACCHARIDES OF STREPTOCOCCUS AGALACTIAE STRAINS FROM URUGUAY. MULTIPLEX PCR VERSUS CONVENTIONAL CAPSULAR SEROTYPING
Rodriguez Cuns, Grisel ULg; BOREUX, Raphaël ULg; ADAMS, Pauline et al

in XIX Lancefield International Symposium on Streptococci and Streptococcal Diseases, Program and Abstract book (2014, November 11)

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See detailIncorporate agroecology within research : The on-going story of four young researchers
Hatt, Séverin ULg; Artru, Sidonie ULg; Boeraeve, Fanny ULg et al

in Broadening Scopes on Food, Squeezing Urban Hinterlands (2014, November 04)

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See detailMagnetic fields in O stars
Nazé, Yaël ULg

in Mathys, Gauthier; Griffin, E.; Kochukhov, O. (Eds.) et al Putting A Stars into Context: Evolution, Environment, and Related Stars (2014, November 01)

During the last decade, large-scale, organized (generally dipolar) magnetic fields with strengths between 0.1 and 20 kG have been detected in dozens of OB stars. This contribution reviews the impact of ... [more ▼]

During the last decade, large-scale, organized (generally dipolar) magnetic fields with strengths between 0.1 and 20 kG have been detected in dozens of OB stars. This contribution reviews the impact of such fields on the stellar winds of O-type stars, with emphasis on variability and X-ray emission. [less ▲]

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See detailJupiter’s polar auroral dynamics
Grodent, Denis ULg; Bonfond, Bertrand ULg

in AAS/Division for Planetary Sciences Meeting Abstracts (2014, November 01)

The morphology of Jupiter’s ultraviolet aurora is commonly described in terms of components located inside (poleward of) or outside (equatorward of) the main oval emission. These components may also be ... [more ▼]

The morphology of Jupiter’s ultraviolet aurora is commonly described in terms of components located inside (poleward of) or outside (equatorward of) the main oval emission. These components may also be discriminated by their temporal behaviour, where the narrowest parts of the main “oval” remain relatively stable over time periods of several hours, and the satellite footprints show large variability with timescales of minutes. Inside the main emission the so-called polar aurora, presumably corresponding to the polar cap mixing open and closed magnetic field lines, is characterized by rapid motions taking the form of swirls, giving rise to the “swirl region” and by intermittent brightenings in the “active region”. Coarse analysis of these motions suggests that they are too fast to respond to an equatorial magnetospheric forcing. Instead, they appear to be related to processes taking place in or above the ionosphere where distances travelled by plasma waves match those of the subtended auroral emission. Here, we present a preliminary improved analysis of the auroral motion in the polar region based on the application of an iterative “Advection Corrected Correlation Image Velocimetry” (ACCIV) method (Asay-Davis et al., 2009). This method allows one to build velocity fields quantifying local and overall auroral motions which may then be used to constrain their origin. [less ▲]

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See detailSearch for Satellite Effects on Saturn's Auroras in Cassini UVIS Data
Pryor, Wayne R.; Esposito, Larry; Jouchoux, Alain et al

in AAS/Division for Planetary Sciences Meeting Abstracts (2014, November 01)

The Cassini UVIS has been obtaining Saturn auroral images since 2004. We have previously reported instances when the main auroral oval brightened briefly in a quasi-periodic fashion near the sub-Mimas ... [more ▼]

The Cassini UVIS has been obtaining Saturn auroral images since 2004. We have previously reported instances when the main auroral oval brightened briefly in a quasi-periodic fashion near the sub-Mimas longitude. Here we examine the large set of auroral images obtained from close range and high sub-spacecraft latitudes. We will plot the brightness of the individual auroral measurements as a function of local time, and as a function of the location of Mimas and other moons to test for any correlations. [less ▲]

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See detailResponse of Microchannel Plate (MCP) Detectors to MeV Electrons: Beamline tests in support of Juno, JUICE, and Europa Mission UVS instrument investigations
Retherford, Kurt D.; Davis, Michael W.; Greathouse, Thomas K. et al

in AAS/Division for Planetary Sciences Meeting Abstracts (2014, November 01)

The response of Microchannel Plate (MCP) detectors to far-UV photons is excellent. MCPs provide a photon-counting capability that is especially useful for high-quality stellar and solar occultation ... [more ▼]

The response of Microchannel Plate (MCP) detectors to far-UV photons is excellent. MCPs provide a photon-counting capability that is especially useful for high-quality stellar and solar occultation measurements. However, use of MCPs within the Jovian magnetosphere for UV measurements is hampered by their ~30% detection efficiency to energetic electrons and ~1% efficiency to γ-rays. High-Z shielding stops energetic electrons, but creates numerous secondary particles; γ-rays are the most important of these for MCPs. These detected particles are a noise background to the measured far-UV photon signal, and at particularly intense times their combination can approach detector global count rates of ~500 kHz when operating at nominal HV levels. To address the challenges presented by the intense radiation environment experienced during Europa encounters we performed electron beam radiation testing of the Juno-UVS flight spare cross-delay line (XDL) MCP in June 2012 at MIT’s High Voltage Research Laboratory (HVRL), and again in Nov. 2013 adding an atomic-layer deposition (ALD) coated test-MCP, to measure the detection efficiency and pulse height distribution characteristics for energetic electrons and γ-rays. A key result from this UVS-dedicated SwRI IR&D project is a detailed characterization of our XDL’s response to both particles (electrons and γ-rays) and photons as a function of HV level. These results provide confidence that good science data quality is achievable when operating at Europa closest approach and/or in orbit. Comparisons with in-flight data obtained with New Horizons Pluto-Alice MeV electron response measurements at Jupiter (Steffl et al., JGR, 2012), LRO-LAMP electron and proton event data, and Juno-UVS Earth proton-belt flyby data, and recent bench tests with radioactive sources at Sensor Sciences increase this confidence. We present a description of the test setup, quantitative results, and several lessons learned to help inform future beamline test experiments dedicated to instrument developments for NASA's next large mission to Europa and ESA's JUICE mission to Ganymede. [less ▲]

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See detailPhotoelectric Conversion Effect in Non-Photovoltaic Photorefractive Materials
Frejlich, Jaime; De Oliveira, Ivan; Carvalho, Jesiel et al

in Latin America Optics & Photonics Conference (LAOP) - OSA Technical Digest (online) (2014, November)

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