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See detailConfesseur du Prince : un profil singulier ? L’exemple de la cour espagnole de Bruxelles au XVIIe siècle.
Pirlet, Pierre-François ULiege

Conference (in press)

Au cœur de l'espace de la cour, le confesseur du Prince présente un profil singulier. La relation qu'il entretient avec son pénitent est unique : tenu à l'obéissance envers le souverain ou son ... [more ▼]

Au cœur de l'espace de la cour, le confesseur du Prince présente un profil singulier. La relation qu'il entretient avec son pénitent est unique : tenu à l'obéissance envers le souverain ou son représentant pour les aspects temporels, ce religieux a la faculté unique d'examiner, de conseiller et de juger la spiritualité du premier personnage de l'État. Attaché à la personne du Prince, les relations de cet ecclésiastique avec les autres courtisans ne peuvent être appréhendées au moyen d'une grille de lecture hiérarchisant les rapports sociaux : échappant à l'organisation laïque – mais pas protocolaire – de la cour et ne dépendant pas directement de la Chapelle royale, le confesseur bénéficie d'une autonomie relative. En outre, son pouvoir politique, en partie officiel grâce aux dignités et charges dont ce religieux est pourvu, est avant tout perçu comme une magistrature d'influence à la portée difficilement mesurable. Enfin, les obligations matérielles liées à l'appartenance de ce prélat à un ordre religieux achèvent de distinguer cet ecclésiastique des autres serviteurs princiers. Cette communication visera à distinguer les particularités de la charge de confesseur princier au sein de la société de cour. L'étude portera particulièrement sur la cour de Bruxelles durant la première moitié du xviie siècle. [less ▲]

Detailed reference viewed: 99 (15 ULiège)
See detailPhénoménologie du temps en prison : Les problèmes de la liberté et de l’adaptation
Englebert, Jérôme ULiege

Conference (2019, December 09)

Qu’est-ce que vivre l’enfermement carcéral ? Il est sans doute plus sensé, pour commencer de répondre à cette question, d’aborder celui-ci à travers le prisme d’un phénomène privilégié. C’est le temps qui ... [more ▼]

Qu’est-ce que vivre l’enfermement carcéral ? Il est sans doute plus sensé, pour commencer de répondre à cette question, d’aborder celui-ci à travers le prisme d’un phénomène privilégié. C’est le temps qui nous occupera. Cette grande coordonnée de l’existence présente un intérêt psychologique considérable bien qu’il soit plus souvent implicite que directement questionné. Nous verrons qu’en prison il existe au moins deux temporalités (celle de l’enfermement et, en parallèle, celle de l’extérieur) et que ces phénomènes sont vécus de façons inédites. Nous en arriverons à poser la question cruciale qui consiste à savoir s’il convient de s’adapter au temps carcéral ou si, au contraire, l’enjeu d’une future réinsertion est précisément de parvenir à ne pas s’adapter. Enfin, nous verrons, grâce à M. Foucault et J-P. Sartre, qu’il s’agit peut-être là du programme de ce que l’on appelle la liberté… Qu'elle s’exprime d’un côté ou de l’autre des barreaux. [less ▲]

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See detailLes formes sonores du politique : pratiques musicales et espaces urbains. Le cas des cardinaux Alessandro d’Este et Maurice de Savoie à Rome (1620-1627)
Morales, Jorge ULiege

Conference (2019, June 27)

Grands mélomanes et protecteurs de musiciens méconnus, les princes-cardinaux Alessandro d’Este (1568-1624) et Maurice de Savoie (1593-1657) occupent une place toute particulière dans le paysage culturel ... [more ▼]

Grands mélomanes et protecteurs de musiciens méconnus, les princes-cardinaux Alessandro d’Este (1568-1624) et Maurice de Savoie (1593-1657) occupent une place toute particulière dans le paysage culturel romain entre 1620 et 1627. En effet, ces prélats ont contribué à façonner la géographie urbaine, sociale et musicale de Rome à travers les espaces de sociabilité qu’ils ont créés ou fréquentés (palais, chapelles, églises, places, jardins ou encore villégiatures). Ces lieux étaient le théâtre d’une vaste activité musicale et culturelle grâce à laquelle se nouaient réseaux ecclésiastiques et réseaux séculiers dans un but d’affirmation politique, sociale et de l’identité nobiliaire. Ces cardinaux ont ainsi favorisé la production d’événements artistiques, miroirs de leur magnificence, ainsi qu’une circulation musicale singulière (musiciens, répertoires et styles musicaux, instruments de musique) entre leurs nations d’origine et la Ville éternelle. La présente communication propose d’étudier les significations culturelles et sociopolitiques des pratiques musicales qui s’inscrivent dans l’espace urbain. Pratiques musicales que l’on peut comprendre en tant qu’expérience musicale collective insérée dans un dispositif politique. Notre hypothèse est que l’expérience musicale, plus que les autres arts, dépasse sa fonction ornementale, qu’elle est partie prenante et agissante dans le « Grand théâtre du monde ». Ainsi, cette approche, à l’intersection de l’histoire sociale et de l’histoire culturelle, vise à penser l’histoire de la musique comme celle de l’influence sociale des évolutions des formes culturelles. [less ▲]

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See detailLa philosophie allemande comme rempart critique (1946-1949)
Franck, Thomas ULiege

Conference (2019, June)

Nous étudierons dans cette communication la manière dont se constitue, dès les premiers numéros de Critique, une théorie critique se positionnant par rapport à l’héritage de la philosophie allemande. Ce ... [more ▼]

Nous étudierons dans cette communication la manière dont se constitue, dès les premiers numéros de Critique, une théorie critique se positionnant par rapport à l’héritage de la philosophie allemande. Ce parti pris se justifie par le projet d’une mise en lumière des stratégies intellectuelles et discursives visant à renouer, après la Seconde Guerre mondiale, avec une philosophie politique allemande susceptible de fournir des outils théoriques à l’analyse des conflits nationaux et internationaux. Il apparaît en effet que plusieurs animateurs fondamentaux de la revue considèrent ce rapport comme l’un des enjeux majeurs pour le champ intellectuel français d’après-guerre . Le recours (souvent ambivalent) à des philosophes tels que Kant, Hegel, Feuerbach, Marx, Engels, Bloch, Lukács et Heidegger, à la musique de Schönberg, Berg, Wagner et Beethoven et aux interprétations de Eisler, Adorno et Schönberg lui-même ou encore les analyses des politiques et des idéologies allemandes de guerre et d’après-guerre constituent en effet une part non négligeable des articles parus dans les premiers numéros de la revue Critique. Par souci méthodologique, nous restreindrons notre étude aux années 1946 à 1949, cette date correspondant à l’émergence de nouvelles problématiques liées à l’avenir des deux Allemagne dans la continuité de la Grundgesetz für die Bundesrepublik Deutschland signée en mai 1949 . [less ▲]

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See detailCustomer-Perceived Intimacy in Healthscapes: What Architects Design and Customers Experience
Martens, Carmen ULiege; Delcourt, Cécile ULiege; Herssens, Jasmien

Conference (2019, June)

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See detailStudy of the impact of non-pharmacological techniques (self-hypnosis/self-care) on cognitive complaints in cancer patients
Bicego, Aminata Yasmina ULiege; Grégoire, Charlotte; Cassol, Helena ULiege et al

Conference (2019, May 30)

Cancer diagnosis generates a number of physical, psychological and cognitive impairments such as memory, attentional and informational processing deficits that can undermine patients’ quality of life (QoL ... [more ▼]

Cancer diagnosis generates a number of physical, psychological and cognitive impairments such as memory, attentional and informational processing deficits that can undermine patients’ quality of life (QoL). Self-hypnosis combined to self-care learning have been used in the past years to treat these symptoms, at the moment of diagnosis, during and/or after the cancer treatments. However, the impact of self-hypnosis/self-care upon cognitive difficulties has not been investigated yet.The aim of this study is to better understand the impact of self hypnosis/self-care upon the cognitive functions by means of the Functional Assessment of Cancer Therapy-Cognitive Function1 (FACT-COG). [less ▲]

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See detailThe impact of non-pharmacological approaches on the patient’s comfort after a cardiac surgery: A randomized controlled trial.
Rousseaux, Floriane ULiege; Puttaert, Ninon ULiege; LEDOUX, Didier ULiege et al

Conference (2019, May 30)

Different non-pharmacological techniques including hypnosis, music, and virtual reality (VR) are being used as complementary tools in the treatment of pain. A new technique which encompasses a combination ... [more ▼]

Different non-pharmacological techniques including hypnosis, music, and virtual reality (VR) are being used as complementary tools in the treatment of pain. A new technique which encompasses a combination of hypnosis and VR, called "virtual reality hypnosis" (VRH), should soon be used on a regular basis in clinical settings. The aim of this study is to better understand the impact of hypnosis, music, VR and VRH, and to investigate their influence on the patient’s perception of pain, anxiety and tiredness after a cardiac surgery in intensive care unit [less ▲]

Detailed reference viewed: 43 (3 ULiège)
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See detailThe CoToCoCo project : a Conceptual Toolkit for Contemporary Conservation
Houbart, Claudine ULiege; Dawans, Stéphane ULiege; Verbeeck, Muriel ULiege

Conference (2019, May 15)

Since the mid-twentieth century, theoretical and practical approaches to heritage have caught the interest of a growing number of academic and professionals. Facing the expanding scope of what an always ... [more ▼]

Since the mid-twentieth century, theoretical and practical approaches to heritage have caught the interest of a growing number of academic and professionals. Facing the expanding scope of what an always larger diversity of stakeholders consider necessary to hand in to the future, guidelines, sets of principles, charters and recommendations have multiplied in order to address each and every challenge posed by this ever-expanding corpus and its very diverse public. At the same time, the globalisation of heritage debates starting, in the field of architecture, which the Athens Conference in 1931 and booming with the World Heritage Convention, has questioned the most deeply rooted cultural traditions on which conservation and restoration principles had been built and developed. Despite some attempts to organise this prolific production and these fundamental questionings into a coherent theory (Munos-Vinas, 2003), experience shows that in front of practical problems, practitioners tend to come back to some fundamentals – the Venice Charter in architecture, Cesare Brandi’s theory in art, for example – despite the anachronism of using them to answer questions which couldn’t be foreseen at the time when they were thought. In parallel, a tendency to decontextualise practices, extracted from their traditional background, regularly helps to argue in favour of projects aiming at sustaining the capitalistic machine or questionable political interests rather that the safeguard and transmission of heritage (using the periodic rebuilding of Shinto temples to justify the rebuilding of any monument in the world is the clearest example). In this context, blurred interpretations of the concepts of identity and authenticity are in many cases responsible for a confusion in the debates and lead to unsatisfactory compromises mostly in disfavour the safeguard of heritage. At the same time, the expansion and diversification of cultural goods contributes in a positive way to a renewal of conservation and restoration approaches. Our ambition is to conjointly revitalize reflections on movable and immovable cultural goods, proposing methodological tools and ressources for a interdisciplinary dialogue in a broad sense. The CoToCoCo project (Conceptual Tools for Contemporary Conservation) is based on borrowings from varied disciplines – sociology, anthropology, mathematics, philosophy, semiology – in order to draw alternative perspectives and submit them for practitioner’s consideration. For this conference, we will provide an example of our methodology and its practical application, starting from a text by the French sociologist Nathalie Heinich on “heritage emotions”. We will submit it to the reflection of two heritage professionals – a conservator of cultural goods, working with communities in Central America and an Irish architect, in order to demonstrate that in order to think “out of the box”, it is sometimes necessary to rejuvenate theory and to try it out just like any other practical tool. [less ▲]

Detailed reference viewed: 21 (2 ULiège)
See detailConscience de soi et schizophrénie
Englebert, Jérôme ULiege

Conference (2019, April 26)

Detailed reference viewed: 28 (1 ULiège)
Peer Reviewed
See detailDes valeurs au projet: peut-on se passer de l'architecte?
Houbart, Claudine ULiege

Conference (2019, April 12)

Plus d’un siècle après l’ouvrage fondateur d’Aloïs Riegl (1903), le processus d’évaluation patrimoniale, étape essentielle du diagnostic, fait aujourd’hui l’objet de polémiques au sein du monde académique ... [more ▼]

Plus d’un siècle après l’ouvrage fondateur d’Aloïs Riegl (1903), le processus d’évaluation patrimoniale, étape essentielle du diagnostic, fait aujourd’hui l’objet de polémiques au sein du monde académique. Après avoir reflété la multiplication des catégories et outils depuis le début du 21e siècle, les publications les plus récentes font état d’une remise en question d’un processus trop largement implicite et monopolisé par un “discours patrimonial autorisé” persistant à ne prendre en considération que les aspects matériels des bien culturels (Smith 2006). Par ailleurs, en France, la littérature récente sur la « fabrique du patrimoine » et les « émotions patrimoniales » a mis en évidence les différents registres de valeur propres à l’expert et au profane (Heinich 2012). Face à la diversification des patrimoines et l’implication grandissante des usagers au sein des processus décisionnels, les modèles d’évaluation sont fondamentalement repensés pour plus d’inclusivité (Fredheim-Khalaf 2016). Au sein de cette littérature particulièrement clarifiante, le restaurateur – pour le patrimoine bâti, l’architecte – est singulièrement absent; centrés sur l’étape de l’identification, les ouvrages et articles ne se risquent que rarement à questionner les implications opérationnelles de l’évaluation et le rôle du restaurateur. Sans prétendre combler cette lacune, cette communication se propose, après un bref état de la question, de susciter le débat sur la place de l’architecte dans le processus d’évaluation patrimoniale. Ni profane, ni expert – au sens où l’éthique de l’expert lui interdit toute émotion (Heinich 2012) –, l’architecte détient-il le pouvoir de déceler une « valeur potentielle » au sein de son objet? [less ▲]

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See detailDéveloppement d’une méthode SFC-MS pour le dosage de vitamines en matrice complexe : Application de la stratégie « Analytical Quality by Design »
Deidda, Riccardo ULiege; Mignolet, Marie ULiege; Jambo, Hugues ULiege et al

Conference (2019, March 26)

Les agences réglementaires pharmaceutiques exigent de plus en plus fréquemment la mise en œuvre des approches systématiques couvrant l'ensemble du cycle de vie des produits pharmaceutiques, des processus ... [more ▼]

Les agences réglementaires pharmaceutiques exigent de plus en plus fréquemment la mise en œuvre des approches systématiques couvrant l'ensemble du cycle de vie des produits pharmaceutiques, des processus de fabrication jusqu’aux tests de contrôle qualité. En 2009, the International Council for Harmonisation of Technical Requirements for Pharmaceutical for Human Use (ICH) a proposé une approche systématique appelée « quality by design » appliqué à la production pharmaceutique. Ce concept étendu aux méthodes analytiques, « analytical quality by design (AQbD) », fait l’objet de recherches approfondies dans les milieux universitaires. Cette stratégie est appliquée aux méthodes séparatives telles que la LC, la CE et la SFC, mais reste actuellement relativement peu étendu au niveau des laboratoires de contrôle de qualité des industries pharmaceutiques. Pourtant, la stratégie AQbD présente un avantage considérable. En effet, elle permet d’obtenir une connaissance approfondie de la méthode et ce, tout au long du développement et de l’optimisation de celle-ci. L’évaluation des paramètres critiques de la méthode (CMPs) sur base de ses attributs critiques (CMAs) rend possible la définition d’une région opérationnelle probable (MODR). Cette région consiste en une multitude de conditions de travail possibles, où pour chacune d’elles, une probabilité de succès spécifique (π) est attribuée. En effet, la notion de risque joue un rôle primordial permettant ainsi d’assurer la robustesse de la méthode tout au long de son cycle de vie. Ce projet s'est concentré sur les aspects pratiques de cette stratégie en donnant un exemple concret de développement d'une méthode SFC-MS (entièrement conforme à la stratégie AQbD) pour une étude de stabilité d’une matrice complexe dans un contexte de contrôle de la qualité. Le développement de la méthode AQbD commence par la définition des requis analytiques (ATP), qui représentent l'objectif de la méthode dans le cadre de son utilisation spécifique. Dans ce cas-ci, l'échantillon étudié est constitué d'un milieu de culture cellulaire complexe constitué de plus de 40 composés et pour lequel les données relatives à la composition qualitative et quantitative ne sont pas complètement disponibles. Ensuite, plusieurs vitamines hydrophiles doivent être quantifiées afin de contrôler la stabilité de ce milieu. Dans la mesure où un effet matrice conséquent avait été mis en évidence dans une étude antérieure (UHPLC-MS), la chromatographie en phase supercritique couplée à la spectrométrie de masse a été choisie comme technique analytique alternative. En effet, dans certaines conditions, la SFC-MS peut être moins affectée par les effets de matrice que la LC-MS [3]. Afin de mettre en place correctement la stratégie AQbD, des expériences préliminaires ont été menées de manière rationnelle dans le but de sélectionner les meilleures conditions de départ. Dans cette phase, appelée « scouting », plusieurs phases stationnaires ont été testées et les colonnes les plus prometteuses ont été sélectionnées afin de mener des essais complémentaires. Différents gradients et modificateurs ont également été préalablement testés afin de sélectionner les conditions permettant l’élution des analytes d’intérêt. En effet, les vitamines ciblées présentent un comportement chromatographique varié entrainant des rétentions très différentes. Les critères de séparation et l'effet de matrice ont été étudiés et optimisés, en prenant en compte non seulement les aspects chromatographiques mais également ceux liés à la détection par MS. Dans ce contexte, une phase « screening » a été menée pour identifier les CMPs ayant une incidence importante sur les CMAs. Ensuite, les CMPs ont fait l’objet d’une étude approfondie au cours de la phase d’optimisation afin de mieux comprendre leur influence sur les performances de séparation et détection de la méthode. Cette dernière partie permettra d’introduire le concept de risque en appliquant des simulations de Monte-Carlo et une approche bayésienne capable d’évaluer l’incertitude du model proposé [4]. Par conséquent, une MODR liée à une probabilité de réussite définie, en termes de respect des spécifications données aux CMAs, sera obtenue. La MODR représente une zone de robustesse théorique dont chacun des points peut être sélectionné comme une condition opératoire en vue d’être validée. Cela démontre l'utilité de cette approche pour la mise au point d'une méthode analytique appliquée aux études de stabilité et ce, dans un contexte de contrôle de la qualité [2]. References [1] ICH Harmonised Tripartite guideline. Pharmaceutical Development Q8(R2) (2009) International Council for harmonisation of technical Requirements for Pharmaceutical for Human Use. [2] R. Deidda, S. Orlandini, Ph. Hubert, C. Hubert, Risk-based approach for method development in pharmaceutical quality control context: A critical review, J. Pharm. Biomed. Anal. 161 (2018) 110-121. [3] V. Desfontaine, F. Capetti, R. Nicoli, T. Kuuranne, J.-L. Veuthey, D. Guillarme, Systematic evaluation of matrix effects in supercritical fluid chromatography versus liquid chromatography coupled to mass spectrometry for biological samples, J. Chromatogr. B 1079 (2018) 51-61. [4] E. Rozet, P. Lebrun, Ph. Hubert, B. Debrus, B. Boulanger, Design Spaces for analytical methods, Trends Anal. Chem. 42 (2013) 157-167. [less ▲]

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See detailTrouble psychotique et logiques relationnelles
Englebert, Jérôme ULiege

Conference (2019, March 23)

Detailed reference viewed: 48 (8 ULiège)
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See detailAgent or Patron? Baldassarre Turini’s role in the Making of the Medici Papal Tombs
Trizzullo, Eva ULiege

Conference (2019, March 18)

Detailed reference viewed: 16 (1 ULiège)
See detailL’approche de Carl Rogers et la philosophie existentielle
Englebert, Jérôme ULiege

Conference (2019, February 04)

Detailed reference viewed: 46 (2 ULiège)
See detailPrincipes en Recherche Clinique
CHARAVET, Carole ULiege

Conference (2019, February)

Detailed reference viewed: 18 (1 ULiège)
See detailL'économie de plateforme : description d'un phénomène d'intermédiation
Cordier, Quentin ULiege

Conference (2019, February)

Detailed reference viewed: 30 (0 ULiège)
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See detailTunable carbon-supported catalyst materials processed by low-pressure plasma treatments of solid precursors
Pireaux, Jean-Jacques; da Silva Pires, Mathieu; Bocchese, Fabrice et al

Conference (2019, February)

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See detailPrévention et tendinopathie : mythe ou réalité ?
Kaux, Jean-François ULiege

Conference (2019, January 31)

Detailed reference viewed: 74 (0 ULiège)
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See detailRegards éthique et phénoménologique sur les contextes de la prise en charge des AICS
Englebert, Jérôme ULiege

Conference (2019, January 31)

Detailed reference viewed: 38 (3 ULiège)
Peer Reviewed
See detailHMGB1: a novel immunotherapeutic target
Herfs, Michael ULiege

Conference (2019, January 28)

Detailed reference viewed: 13 (1 ULiège)
See detailTargeting a coagulation-EMT axis in early metastasis
Vanwynsberghe, Aline ULiege; Genna, Anthony ULiege; Gilles, Christine ULiege

Conference (2019, January 28)

Detailed reference viewed: 17 (3 ULiège)
See detailLes temps carcéraux
Englebert, Jérôme ULiege

Conference (2019, January 26)

Detailed reference viewed: 25 (6 ULiège)
See detailLa rationalisation du parlementarisme au niveau fédéral
Pironnet, Quentin ULiege

Conference (2019, January 25)

Detailed reference viewed: 24 (2 ULiège)
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See detailCirculation and Uses of Images in the Low Countries during the Renaissance. Reflections on Jan Swart van Groningen
Vankan, Gaylen ULiege

Conference (2019, January 25)

Personnalité aussi fascinante que méconnue, à la fois peintre, graveur et dessinateur, Jan Swart van Groningen (ca. 1495-ca. 1563) déploya, dans les anciens Pays-Bas, une formidable activité de concepteur ... [more ▼]

Personnalité aussi fascinante que méconnue, à la fois peintre, graveur et dessinateur, Jan Swart van Groningen (ca. 1495-ca. 1563) déploya, dans les anciens Pays-Bas, une formidable activité de concepteur d’images et de modèles figurés passibles d’usages multiples. Ce contemporain de Pieter Bruegel l’Ancien se signale notamment par l’habileté dont il fit preuve pour s’approprier des compositions et motifs éprouvés, puisant à des sources aussi diverses que les œuvres des Primitifs flamands, celles de graveurs italiens ou de Dürer, qu’il réinterpréta pour créer des formules iconographiques à la fois innovantes et visuellement marquantes. À leur tour, celles-ci inspirèrent d’autres artistes, actifs dans des disciplines diverses, qui les reformulèrent eux aussi, afin de les adapter à de nouvelles exigences esthétiques, fonctionnelles ou iconographiques ; nombre des modèles conçus par Jan Swart connurent une faveur particulière dans le milieu des peintres-verriers où ils furent notamment exploités pour la production de « rondels ». Ainsi, l’artiste hollandais s’insérait au cœur d’un vaste réseau d’échanges et de circulations des images, qui transcendait les genres artistiques. Envisagée à l’aune du concept d’intericonicité, l’œuvre du maître hollandais dévoile une dimension hautement interactive de la création artistique de la Renaissance, essentiellement fondée sur l’imitation et la réinterprétation formelle. Un dessin sur l'histoire de Tobie (Londres, British Museum) servira à illustrer notre propos. [less ▲]

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See detailLa révision des immunités parlementaires
Jousten, Andy ULiege

Conference (2019, January 25)

Les immunités parlementaires soulèvent un certain nombre de questions fondamentales qui méritent une étude approfondie. Cependant, elles soulèvent également un certain nombre de difficultés d'application ... [more ▼]

Les immunités parlementaires soulèvent un certain nombre de questions fondamentales qui méritent une étude approfondie. Cependant, elles soulèvent également un certain nombre de difficultés d'application bien précises et identifiables, auxquelles le Constituant pourrait réagir dans le cadre d'une révision de la Constitution. Un certain nombre de propositions peuvent à cet égard être émises: extension du champ d'application de l'irresponsabilité parlementaire aux opinions émises en dehors de la tribune, mise en place d'une possibilité de renonciation aux immunités, voire mise en place d'une procédure de levée facilitée en cas d'accord du parlementaire [less ▲]

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See detailNuisibles et zoonoses
Caparros Megido, Rudy ULiege; Francis, Frédéric ULiege

Conference (2019, January 24)

Différents insectes nuisibles qui sont présents dans les denrées et potentialité de transmission de maladies

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See detailHow to improve the care path of osteoporotic patients?
Kaux, Jean-François ULiege; LECART, Marie-Paule ULiege; NEUPREZ, Audrey ULiege

Conference (2019, January 19)

Detailed reference viewed: 18 (3 ULiège)
See detailTrouble borderline et logiques relationnelles
Englebert, Jérôme ULiege

Conference (2019, January 19)

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See detailVers une typologie des usages pédagogiques de la vidéo basée sur l’activité de l’apprenant
Laduron, Christophe ULiege; Rappe, Jonathan ULiege

Conference (2019, January 18)

Le recours à la vidéo en formation bénéficie d’un réel engouement à l’heure où la production médiatique et sa diffusion sont devenues beaucoup plus accessibles que par le passé, grâce à l’essor des TIC ... [more ▼]

Le recours à la vidéo en formation bénéficie d’un réel engouement à l’heure où la production médiatique et sa diffusion sont devenues beaucoup plus accessibles que par le passé, grâce à l’essor des TIC, et notamment des outils de conception de vidéos et des plateformes de diffusion en ligne. Toutefois, la multiplicité des expériences en la matière ainsi que la diversité des usages pédagogiques qui en découlent restent peu formalisées dans la littérature. Des typologies de vidéos pédagogiques ou d’usages pédagogiques de la vidéo existent, néanmoins elles se centrent surtout sur les caractéristiques médiatiques des vidéos utilisées. Le but de notre contribution est de proposer une typologie des usages pédagogiques de la vidéo reposant sur l’activité de l’apprenant, qu’elle soit visée ou effective, et qu’elle soit à l’initiative du formateur ou de l’apprenant lui-même. Elle envisage également la vidéo comme support métacognitif. Ce travail se base sur des modèles théoriques catégorisant l’activité de l’apprenant et fera l’objet d’une validation sur base de l’analyse systématisée d’un corpus de dispositifs éducatifs intégrant la vidéo. [less ▲]

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See detailResultats de l’Etude Cgm en vraie vie en Belgique (LCEM)
Radermecker, Régis ULiege

Conference (2019, January 17)

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See detailDes dispositifs de formation hybrides pour faciliter la conciliation d’études supérieures avec une pratique sportive de haut niveau ? Le cas de l’Université de Liège (Belgique).
Bonni, Jérémy ULiege; Cloes, Marc ULiege; Afkir, Naïm ULiege et al

Conference (2019, January 17)

This research is in correlation to a first study conducted by Bonni, Cloes and Theunissen (2018) where the results have highlighted the interest of pursuing studies together with a high-level sport; and ... [more ▼]

This research is in correlation to a first study conducted by Bonni, Cloes and Theunissen (2018) where the results have highlighted the interest of pursuing studies together with a high-level sport; and also a second study conducted by Bonni, Cloes and Denis (2018), which results have highlighted the relevance of using ICT and hybrid training devices to meet the specific needs of sports students at the University of Liège (Belgium), in view of the difficulties they encounter in reconciling high-level sports and university studies. However, the qualitative approach followed during this second study, did not make it feasible to generalize the results obtained to the entirety of this population. The research covered by this communication has therefore collected quantitative data from all the sports students at the University. The obtained results will (or will not) validate the relevance of using such devices to meet the specific needs of these particular students even more adequately. On the basis of these results, the implementation of pilot projects aiming at introducing the formulated courses of action will (or won’t) be proposed. [less ▲]

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See detailPoint sur les inhibiteurs des SGLT2, l’expérience en Belgique
Radermecker, Régis ULiege

Conference (2019, January 16)

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See detailLa Communauté et la Région germanophone
Bouhon, Frédéric ULiege

Conference (2019, January 11)

Présentée dans le cadre d'un forum qui se proposait de discuter diverses propositions académiques de révision de la Constitution belge, cette brève contribution consiste à suggérer la création d'une ... [more ▼]

Présentée dans le cadre d'un forum qui se proposait de discuter diverses propositions académiques de révision de la Constitution belge, cette brève contribution consiste à suggérer la création d'une Région germanophone, à côté de la Communauté germanophone, et de confier à cette dernière l'exercice, en principe, de toutes les compétences régionales. [less ▲]

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See detailUn « in foro interno, in foro externo »...à la carte ? Réflexions relatives à la fédéralisation de la politique commerciale extérieure
Miny, Xavier ULiege

Conference (2019, January 11)

Cette présentation vise à critiquer cette tendance centralisatrice de la politique commerciale internationale. Sans que l’on nie pour autant l’importance de reconsidérer les processus de concertation et ... [more ▼]

Cette présentation vise à critiquer cette tendance centralisatrice de la politique commerciale internationale. Sans que l’on nie pour autant l’importance de reconsidérer les processus de concertation et de négociation en la matière, en particulier dans le cadre des traités mixtes, une révision constitutionnelle dans le sens d’une centralisation partielle des relations extérieures provoquerait, selon nous, un double niveau de fragmentation, au détriment de la cohérence souhaitée, et un détournement majeur de la logique fédérale du pays. [less ▲]

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See detailMise en place de dispositifs organisés de tutorat et référentialisation des pratiques dans l’accueil de l’enfance
Francois, Nathalie ULiege; Noël, Stéphanie ULiege; Pirard, Florence ULiege

Conference (2019, January 10)

Le tutorat de formation prend place dans des dispositifs ensembliers permettant de rapprocher le monde scolaire et le monde de production. Quand il est organisé (Boru, 1996), le tutorat donne l’occasion ... [more ▼]

Le tutorat de formation prend place dans des dispositifs ensembliers permettant de rapprocher le monde scolaire et le monde de production. Quand il est organisé (Boru, 1996), le tutorat donne l’occasion au tutoré de s’engager dans des situations réelles et dans un collectif de travail susceptibles d’être source d’apprentissage et de socialisation (Filliettaz, Rémery & Trébert, 2014). Toutefois, dans le secteur de l’accueil de la petite enfance, qui reste peu professionnalisé dans certains pays, le tutorat peut être davantage « spontané », pratiqué sans reconnaissance formelle ou juste « institué », officiellement réglementé sans être inscrit dans un plan de formation de l’organisation. Il s’agit alors de transformer et d’organiser des pratiques spontanées et/ou instituées en pratiques conscientes, partagées au sein d’un collectif de travail en concertation avec l’institut de formation et intégrées dans le projet éducatif du lieu de stage qui reste avant tout un lieu d’accueil pour les enfants et les familles. Notre communication présente les résultats d’une intervention évaluative menée dans une démarche recherche-action-formation visant à mettre en place des dispositifs organisés de tutorat dans le secteur de l’accueil de l’enfance (0-12 ans) en Fédération Wallonie-Bruxelles. Cette intervention combine trois types de démarches évaluatives participatives. La première consiste en une autoévaluation des pratiques effectives de tutorat à partir de critères préétablis proposés comme support d’analyse aux professionnels de terrain et consignés dans un carnet de bord. La deuxième consiste en une auto-évaluation des pratiques à partir d’un projet d’action ciblé sur un objectif prioritaire dégagé de la première auto-évaluation extensive. Enfin, la troisième s’inscrit dans une analyse approfondie des effets des pratiques innovantes mises en œuvre et dans une écriture professionnelle adressée aux pairs. L’ensemble de la démarche est conçue de manière à favoriser une référentialisation (Figari, 1994) des pratiques de tutorat. [less ▲]

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See detailÉvaluation continue et analyse de tendances au service de la personnalisation du soutien à l’apprentissage en physique à l’université
Marique, Pierre-Xavier ULiege; Hoebeke, Maryse ULiege

Conference (2019, January 09)

Lors de chaque année académique, une série de données, concernant le public d’étudiants en première année de médecine, dentisterie et sciences biomédicales à l’Université de Liège (Belgique), est récoltée ... [more ▼]

Lors de chaque année académique, une série de données, concernant le public d’étudiants en première année de médecine, dentisterie et sciences biomédicales à l’Université de Liège (Belgique), est récoltée dans le cadre du cours de physique inscrit à leur cursus. Ces données sont de plusieurs ordres : sociologique, scolaire et lié à la participation aux activités proposées à l’université. Elles doivent servir à établir des corrélations afin de dégager des tendances dont l‘occurrence permettra de fournir à l’étudiant un soutien adapté à sa situation personnelle. Ce cours de physique, donné exclusivement lors du premier quadrimestre (de septembre à décembre), est composé de séances magistrales, de répétitions (séances d’exercices) et de travaux pratiques. En complément à ce dispositif en présentiel existe une plate-forme en ligne utilisée comme instrument de soutien à l’apprentissage et de remédiation (Marique & Hoebeke, 2014). L’ensemble des outils disponibles en ligne comporte notamment un simulateur ludifié/gamifié permettant à l’étudiant de s’entraîner et de s’autoévaluer à l’aide de médailles à remporter (Marique, Van de Poël & Hoebeke, 2017 ; Marique, Van de Poël, Verpoorten & Hoebeke, 2018). Le cours de physique dans les études du secteur des sciences de la vie poursuit un double objectif : fournir les bases physiques nécessaires à la bonne compréhension de leur cursus futur et développer une démarche transversale d’apprentissage via notamment l’acquisition de compétences en résolution de problèmes et de planification de l’étude. Dans un souci de suivi de l’évolution de chaque étudiant dans ses apprentissages, un système d’évaluations formatives à intervalle régulier (mensuel) est mis œuvre dès l’année académique 2018-2019 sur la base des expériences partielles antérieures. Celui-ci repose sur 5 évènements organisés aux alentours du 15 de chaque mois de septembre à janvier. Chacun de ces tests est exclusivement composé de questions à choix multiples. Le premier test est soumis aux étudiants lors du premier cours de physique. Il porte sur les prérequis aux études de médecine et dentisterie, à savoir la matière de physique au programme de l’option scientifique de l’enseignement secondaire. Le deuxième test est organisé à l’issue des séances de cours portant sur le premier thème (l’optique pour les étudiants en médecine et dentisterie). Les troisième et quatrième tests évaluent de manière formative les étudiants sur, respectivement, la première et la seconde moitié du cours de physique de premier bachelier. En janvier est organisé l’examen certificatif. Les résultats de l’étudiant aux évaluations successives seront analysés et compilés de telle façon que celui-ci puisse mesurer son évolution dans l’acquisition de compétences méthodiques et disciplinaires. L’analyse des résultats consistera en une classification des performances de l’étudiant sur la base de la pyramide des taxonomies de Bloom (Bloom, 1956), à partir d’une évaluation des questions de chacun des tests réalisée par les membres de l’équipe pédagogique et plusieurs enseignants du secondaire. La première communication diagnostique fournie à l’étudiant est transmise à l’issue du deuxième test, après qu’une adaptation à l’enseignement universitaire et une confrontation à la matière nouvelle a pu avoir lieu. De cette façon, l’apprenant peut prendre conscience de l’éventuelle adéquation de ses méthodes d’étude avec les exigences de l’enseignement en première année de bachelier en comparant ses performances sur les matières prérequises (test 1) et nouvelles (test 2). Cette première phase de mise en œuvre du dispositif aura eu lieu lors du déroulement du colloque de l’ADMEE-Europe 2019. Nous serons alors en mesure de dégager les premières tendances entre les profils et les performances des étudiants et de poser les questions de recherche opérationnelles qui permettront à l’avenir d’ajuster le soutien fourni à chacun. BLOOM, B. Taxonomy of Educational Objectives, Handbook I : The Cognitive Domain. David McKay, New York, 1956 MARIQUE, P.-X., HOEBEKE, M. Plate-forme interactive au service des grandes populations d’étudiants suivant un cours de Physique, Actes de la Conférence TICE 2014, Béziers, France, 2014 MARIQUE, P.-X., VAN DE POËL, J.-F., HOEBEKE, M. Quel outil d’entraînement pour des étudiants en médecine évalués par QCM en physique ?, Actes du Colloque ADMEE 2016, Lisbonne, Portugal, 2016 MARIQUE, P.-X., VAN DE POËL, J.-F., VERPOORTEN, D., & HOEBEKE, M. (2018). Ludifier un simulateur d’examen en recourant à des badges – Effets sur la participation, la perception et la performance. Revue internationale des technologies en pédagogie universitaire, 15(2), 15-31. [less ▲]

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See detailWelcome to migrants in a borderless Europe: bryophytes show the way to go
Ledent, Alice ULiege

Conference (2019, January 09)

Climatic fluctuations during the Last Glacial Maximum (LGM) exerted a profound influence on biodiversity patterns, but their impact on bryophytes, the second most diverse group of land plants, has been ... [more ▼]

Climatic fluctuations during the Last Glacial Maximum (LGM) exerted a profound influence on biodiversity patterns, but their impact on bryophytes, the second most diverse group of land plants, has been poorly documented. Approximate Bayesian Computations based on coalescent simulations showed that the post-glacial assembly of European bryophytes involves a complex history from multiple sources. The contribution of allochthonous migrants was 95-100% of expanding populations in about half of the 15 investigated species, which is consistent with the globally balanced genetic diversities and extremely low divergence observed among biogeographic regions. Such a substantial contribution of allochthonous migrants in the post-glacial assembly of Europe is unparalleled in other plants and animals. The limited role of northern micro-refugia, which was unexpected based on bryophyte life-history traits, and of southern refugia, is consistent with recent paleontological evidence that LGM climates in Eurasia were much colder and drier than what paleoclimatic models predict. [less ▲]

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See detailLes gestes d'élaboration du savoir dans les carnets de recherche d'Hypothèses
Mayeur, Ingrid ULiege

Conference (2019, January 08)

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See detailLes habiletés langagières des enfants grands prématurés à l'âge préscolaire
Desmottes, Lise ULiege; Maillart, Christelle ULiege; VIELLEVOYE, Renaud ULiege et al

Conference (2019, January 08)

Les enfants nés prématurément sont plus à risque de présenter des difficultés au niveau langagier, cognitif et moteur que les enfants nés à terme. Ces difficultés peuvent avoir un impact négatif sur la ... [more ▼]

Les enfants nés prématurément sont plus à risque de présenter des difficultés au niveau langagier, cognitif et moteur que les enfants nés à terme. Ces difficultés peuvent avoir un impact négatif sur la qualité de vie de ces enfants et se répercuter sur les apprentissages scolaires. Les préciser et en comprendre les mécanismes s’avère d’autant plus important que le nombre d’enfants nés prématurément augmente depuis plusieurs décennies. Au cours de cette présentation, nous tenterons de mieux caractériser les habiletés langagières des enfants grands prématurés à 5 ans en apportant des éléments de réponse à ces questions : certaines compétences langagières sont-elles plus altérées que d’autres ? Les difficultés langagières se résorbent-elles avec le temps ? Quel est l’impact des compétences phonologiques précoces sur l’apprentissage du langage écrit ultérieur ? [less ▲]

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See detailA common neural substrate for sonic and electric signaling in synodontid catfish
Kever, Loïc ULiege

Conference (2019, January 06)

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See detailGeneralist feeding guilds in reef fishes: Macroevolutionary sink or future source of diversity?
Frederich, Bruno ULiege; Aguilar-Medrano; Gajdzik, Laura

Conference (2019, January 05)

Reef fishes have diversified into thousands of species that fill various types of ecological niches, contributing to the tremendous biodiversity of reef ecosystems. Yet, the dynamics of this diversity ... [more ▼]

Reef fishes have diversified into thousands of species that fill various types of ecological niches, contributing to the tremendous biodiversity of reef ecosystems. Yet, the dynamics of this diversity remain understudied, especially the evolutionary relation between the different functional traits, which relate to the life strategies and ecosystem roles of organisms. Here, we explore how one functional trait, the feeding habit, impacts the dynamics of species diversification and functional evolution. Using comparative phylogenetic methods in conjunction with taxonomic, trophic and functional datasets, we analyze the functional evolution of two major radiations of reef fishes, the wrasses (Labridae) and the damselfishes (Pomacentridae). We demonstrate that the feeding habit plays a key role in the evolution of the rest of functional diversity. The nature and the diversity of functional roles hosted by fish in reef ecosystems are tightly linked to their feeding attributes. Counter to a simple prediction of ecological opportunism, we found that “generalist” feeding guilds (i.e. those composed of species feeding on food sources from the whole bentho-pelagic compartment) do not show higher rates of functional diversification and do not necessarily display higher levels of functional diversity. Furthermore, in contrast to recent macroevolutionary studies on mammals and birds, we highlight that these “generalist” guilds of fishes represent the basis of future diversity and cannot be considered as evolutionary sinks or as "dead-ends". These findings clearly re-define our view on the ecological and evolutionary roles played by generalist feeding guilds. [less ▲]

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See detailAuthentication of falsified medicine tablets by handheld Raman spectroscopy class modeling
Coic, Laureen ULiege; Sacre, Pierre-Yves ULiege; Avohou, Tonakpon Hermane ULiege et al

Conference (2019, January 01)

Since last decades, the world has known significant changes in the pharmaceutical products sale. The emergence of the internet trade is an important issue because it is easy to sell medicines without ... [more ▼]

Since last decades, the world has known significant changes in the pharmaceutical products sale. The emergence of the internet trade is an important issue because it is easy to sell medicines without passing any control. Moreover, in low- and middle-income countries (LMIC), the number of local pharmacies has grown, increasing the risk to have substandard or falsified medicines. Indeed, according to the World Health Organization (WHO) it is difficult to ensure quality medicines due to areas conflict, corrupted governments and poor health system [1]. For that reason, several analytical techniques have been developed since last decade. One of the most interesting tool is the Minilab, developed by the Global Pharma Health Fund (GPHF), which is a mobile mini-laboratory for fast drug quality control. Moreover, Raman spectroscopy has gained a great interest because it can be used at any step of analytical chain or on the fieldwork with handheld devices. However, spectroscopic data implies development of chemometrics models to gather relevant information. Several unsupervised techniques have already been used to authenticate drug products [2-3]. Due to the intrinsic properties of classification methods, class modeling is more appropriated to this kind of analysis. Indeed, falsified medicines can be quite different from the calibration set, so that, it does not have sense to attribute a class meanwhile it is dissimilar to the calibration set. In this study, the performances of two class-modeling techniques will be evaluated on handheld Raman spectra, to separate falsified medicines from authentic drugs. Three different generics of paracetamol, ibuprofen and artemether-lumefantrine with different dosage, dosage form and formulations were analyzed. Most of them were gathered in local Belgium pharmacies and other were gathered in Africa (artemether-lumefantrine formulations). Samples were analyzed with a handheld Raman spectrophotometer Pharma 21CFR part 11 qualified (Truscan RM, Thermo Scientific, USA) directly through the blister. In order to have a good representativeness of intra-batch variability, 10 tablets were analyzed per sample. The acquisition parameters were set to default. Two models were tested: one-class PLS (OC-PLS) [4] and the data driven-soft independent modeling class analogy (DD-SIMCA) [5]. All the computations were done in Matlab® (R2017b). The calibration and validation set was the same for each model and composed of 60 spectra for each, with different batch number. Because of the nature of each algorithm, there is a significant difference in terms of separation. Looking at Figure 1, the separation of dosage form for ibuprofen is much different between the two models. For the DD-SIMCA, it is more difficult to separate the long acting release from the soft capsule/coated tablet compared to the OC-PLS model. For the other API, similar results are obtained for the dosage and for the brand. It seems that the OC-PLS is more sensitive to the small spectral variabilities. In the case of artemether-lumefantrine formulations, the separation between samples is much more difficult. Indeed, the lumefantrine is a high Raman scatterer. This can explain that the signal of artemether and excipients is difficult to access. Elsewhere, in terms of development, the DD-SIMCA is much harder to optimize because there are more tunable parameters than for OC-PLS. Furthermore, both models are really influenced by spectral pretreatment. An optimization has to be done for each. The authentication of pharmaceutical products by handheld Raman spectroscopy has been possible thanks to class modeling. Both tested algorithms shown interesting results regarding the separation of samples depending on their characteristics. The optimization of data processing and pre-processing is the key-step to improve as sensitivity as specificity of both class modeling methods. [less ▲]

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See detailDegradation dynamics processes and macrofauna communities successions within drift kelp accumulations: an in-situ experimental approach
de Bettignies, Florian; Dauby, Patrick ULiege; Brunet, Maéva et al

Conference (2019, January)

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See detailHighlights ESEPN
ROUSSEAU, Anne-Françoise ULiege

Conference (2019, January)

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See detailBirth and Evolution of Acoustic Communication in Piranhas (Serrasalmidae)
Parmentier, Eric ULiege; Raick, Xavier ULiege; Vigouroux, Régis et al

Conference (2019, January)

Within piranhas, sound production is known in carnivorous species whereas herbivorous species were thought to be mute. As these carnivorous sonic species have a complex sonic apparatus, we hypothesise ... [more ▼]

Within piranhas, sound production is known in carnivorous species whereas herbivorous species were thought to be mute. As these carnivorous sonic species have a complex sonic apparatus, we hypothesise that transitional forms could be found in some serrasalmid species. We investigate sound production in different species covering all the Serrasalmidae phylogenetic tree to understand the evolution of the sonic mechanism in this family. The results highlight the evolutionary transition from a simple sound-producing mechanism without specialised sonic structures in the herbivorous species (Piaractus and Myloplus) to a sonic mechanism involving large, fast-contracting sonic muscles vibrating the swimbladder in the genera Pygocentrus and Serrasalmus. Hypaxial muscles in herbivores primarily serve locomotion, but some bundles caused sound production during swimming accelerations, meaning these muscles have gained a dual function. Sound production therefore seems to have been acquired through an exaptation event, i.e. the development of a new function (sound production) in existing structures initially shaped for a different purpose (locomotion). In further evolutionary stages (Catoprion and Pygopristis), some bundles are distinguishable from other hypaxial muscles and insert directly on the swimbladder. At this stage, the primary function (locomotion) is lost in favour of the secondary function (sound production). In the last stage (Pygocentrus and Serrasalmus), the muscles and insertion sites are larger and the innervation involves more spinal nerves, improving calling abilities. The comparison of sounds and sonic mechanisms shows the evolution of acoustic communication corresponds to a trajectory where the initial exaptation event is then subject to adaptations. [less ▲]

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See detailFluvial dike breaching induced by overtopping: lessons from experimental and numerical studies
El kadi Abderrezzak, Kamal; Rifai, Ismail; Dewals, Benjamin ULiege et al

Conference (2019)

Overtopping of fluvial dikes (i.e. dykes or levees) can lead to the initiation of breaching and potentially brutal dike failure and inundation of the protected area. Flood risk management and prevention ... [more ▼]

Overtopping of fluvial dikes (i.e. dykes or levees) can lead to the initiation of breaching and potentially brutal dike failure and inundation of the protected area. Flood risk management and prevention require a precise quantification of the hazard. Accurate estimate of the flow through the breach is paramount, for which a precise understanding of the breach formation and expansion is required. Existing methods are often the result of investigations conducted on overtopping of frontal dikes (embankment dams). The application of such approaches to fluvial dikes is not reliable and processes underpinning breach expansion are still under research. An experimental program was conducted to fill this gap by investigating the physical processes involved in fluvial dike gradual breaching induced by overtopping. Experiments were conducted within the framework of a collaboration between the National Laboratory of Hydraulics and Environment (LNHE) of the R&D division of EDF and the research team of Hydraulics in Environmental and Civil Engineering (HECE) of University of Liège. Experiments were conducted in two distinct experimental setups, each consisting of a main channel and a floodplain area separated by an erodible fluvial dike. The focus was made to study the spatial erosion of homogenous, non-cohesive dikes induced by overtopping. Measurements included continuous scanning of the dike geometry using a non-intrusive method (Laser Profilometry Technique), designed and developed specifically for the present work. Tests conducted under controlled flow and dike configurations allowed assessing the effects of channel inflow discharge, downstream channel regulation system, and floodplain confinement on the breach development and outflow. Effects of main channel size, dike material size, apparent cohesion, and bottom erodibility were studied as well. In the present paper, the most important findings of the experimental study are presented. Additionally, the flow and dike breaching were simulated using the two-dimensional depth averaged code TELEMAC-2D. This allowed assessing the performance of a detailed morphodynamic code for dike breaching processes. [less ▲]

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See detailPsychiatrie et liberté : approche phénoménologique
Englebert, Jérôme ULiege; Cormann, Grégory ULiege

Conference (2019)

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See detailOptimization of hydropower production in a water supply network using CasADi
Pirard, Thomas ULiege; Erpicum, Sébastien ULiege; Bruwier, Martin ULiege et al

Conference (2019)

Installation of (micro-)turbines in water supply networks has become an attractive strategy for small hydropower production in urban environment. It has virtually no impact on ecosystems and offers side ... [more ▼]

Installation of (micro-)turbines in water supply networks has become an attractive strategy for small hydropower production in urban environment. It has virtually no impact on ecosystems and offers side-benefits such as leakage reduction by turning excess pressure into hydropower. Our research aims at improving the modelling and optimization of existing tools for sizing and selecting the optimal location of turbines in urban water supply systems. A critical component of the analysis is the hydraulic model of the system. In most existing studies, the flow variables in the water supply network are computed under the assumption of a quasi-steady flow. Here, we opt for an in-house hydraulic model which achieves a more realistic description of time-varying flow. We will present comparisons of the two approach to assess the potential benefits of the unsteady computation. For optimizing the size and location of turbines in the network, most research uses meta-heuristics [1-3]. In this research, we explore an alternative operational strategy, based on the detailed hydraulic computation of the water supply network prior to the installation of turbines, followed by formal optimization techniques. Both the hydraulic model and the optimization technique are implemented in the CasADi framework for nonlinear optimization and optimal control [4]. The operationality of our developments is shown for a range of standard case studies as well as a real-world case study representing the urban water supply system of Liege, Belgium, which includes 3,600 km of pipes and more than 200 hydraulic structures, such as interconnected reservoirs. Monitoring data from around 700 gauges throughout the water supply network are used to provide a deep understanding of the system operation and a validation of the hydraulic model. [less ▲]

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See detailAppréhender l'étude du verre du Tempio dei Fabri Navales et de la Schola del Traiano
Dienst, Simon ULiege; Frère, Géraldine ULiege

Conference (2018, December 19)

Since 2014, Géraldine Frère and Simon Dienst have been studying the glass artifacts found respectively in the Tempio dei Fabri Navales and the Schola del Traiano areas. The first excavation, conducted ... [more ▼]

Since 2014, Géraldine Frère and Simon Dienst have been studying the glass artifacts found respectively in the Tempio dei Fabri Navales and the Schola del Traiano areas. The first excavation, conducted by Cl. De Ruyt and the University of Namur, took place between 1992 and 2005. Since then, the study of archaeological material has been in progress. The second excavation campaign was led by Cl. Krause and L. Chrzanovski with a Genevan team between 1997 and 1998, then by J.-M. Moret and Th. Morard at the University of Lyon 2 between 2002 and 2010, while the post-excavation work is the responsibility of the University of Liège. These glass studies are supported by the Research Unit “Art, Archéologie et Patrimoine” of the University of Liege. Although different, both methods are based on the mixed use of quantification and typology as well as the observation of the archaeological context. However, different finalities brought minor methodological differences. Geraldine Frere’s study is focused on the technical study, archaeometric and conservation-restauration data, while Simon Dienst’s examines the relations between glassware and pottery. The main aim of this communication is to introduce our methodologies with a chronological presentation of the glass from both excavations. Indeed, these studies show a complementary range of dating between the Late Republican period and Late Antiquity. Furthermore, they bring a lot of economical, technological and cultural information about the evolution of glass, while considering the particularities linked to the antique city of Ostia. Finally, these studies contribute to the publication of archaeological glasses in stratigraphical context. Unlike ceramics, glass from archaeological excavations is rarely published or in brief terms (except for tombs), although it has been gradually gaining interest in recent decades. [less ▲]

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See detailSelf-testing in infectiology: is it the future?
Hayette, Marie-Pierre ULiege

Conference (2018, December 19)

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See detailQuality control and aggregation follow-up of insulin formulations
Demelenne, Alice ULiege; Napp, Aurore ULiege; Radermecker, Régis ULiege et al

Conference (2018, December 19)

The prevalence of diabetes is increasing every year making insulin formulations widely prescribed medicines. Fast and efficient methods to assess the quality of such biopharmaceutical products are thus ... [more ▼]

The prevalence of diabetes is increasing every year making insulin formulations widely prescribed medicines. Fast and efficient methods to assess the quality of such biopharmaceutical products are thus required, more particularly methods to assess the content of API and potential aggregates. We started our study on insulin aggregation using the European Pharmacopeia method. Since methods to assess aggregate content are often contradictory, we also developed original and orthogonal methods using size-exclusion chromatography (SEC) and capillary gel electrophoresis (CGE). It was demonstrated that methods under neutral conditions (SEC and CGE) yield to similar aggregate content contrary to pharmacopeia SEC method that works under acidic conditions. Ion-mobility Q-TOF mass spectrometer was also used to confirm the presence and the identity of insulin dimers. Then, we applied the three methods to the analysis of an insulin formulation and similar results to those obtained for human insulin as raw material were observed. We also used the CGE method to study the stability of human insulin under different storage conditions. Finally, we used UHPLC and mass spectrometry to quantify insulin formulation from different supply chains. We demonstrated that all the analyzed formulations had a potency between 95.0 % and 105.0 % of the potency stated on the label. This was useful to dispel doubts regarding issues in insulin cold chain supply recently described in the litterature. [less ▲]

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See detailBCCM/ULC: a collection of cyanobacteria linking Poles to Space
Wilmotte, Annick ULiege; Beets, Kim ULiege; Santoro, Mariano ULiege et al

Conference (2018, December 18)

The BCCM/ULC public collection funded by the Belgian Science Policy Office (BELSPO) aims to gather a representative portion of the cyanobacterial diversity with a focus on Polar biotopes (e.g. limnetic ... [more ▼]

The BCCM/ULC public collection funded by the Belgian Science Policy Office (BELSPO) aims to gather a representative portion of the cyanobacterial diversity with a focus on Polar biotopes (e.g. limnetic microbial mats, soil crusts, cryoconites, endolithes). It represents an exclusive Biological Resource Centre (BRC) where characterized polar cyanobacterial strains are available for researchers to study the taxonomy, biogeography, evolution, synthesis of secondary metabolites, adaptation to harsh environmental conditions, and genomic make-up. It currently holds 190 strains, including over 120 of Polar origin (online catalogue: http://bccm.belspo.be/catalogues/ulc-catalogue-search). Living cultures are regularly transferred, and the majority are also cryopreserved (as back-up), in order to assure their preservation and the rapid delivery of strains to clients for fundamental and applied research in both academia and industry. Genomic DNA is also available on request. The collection has obtained the ISO 9001:2015 certification for deposit and distribution of strains, as part of the multi-site certification for the Belgian Coordinated Collections of Microorganisms (BCCM) consortium. A polyphasic approach based on morphological and molecular identifications (based on SSU rRNA sequences) show that the strains belong to the Synechococcales, Oscillatoriales, Chroococcidiopsidales, Pleurocapsales, and Nostocales orders. This large diversity renders the BCCM/ULC collection particularly interesting for taxonomic, biogeographic and phylogenomic studies. Furthermore, the sequencing of the genomes of several strains has started. The BRC also aims to become a source for researchers to study further applications of cyanobacteria in astrobiology as shown by investigations of the resistance to desiccation and radiation of strains of Chroococcidiopsis sp. dominating rock-dwelling communities in extreme dry environments [1]. In paleontology, cyanobacteria represent model organisms thanks to their fundamental role in the oxygenation of the atmosphere and oceans during the Great Oxidation Event. Lastly, the mat-forming cyanobacterial strains may represent “critical organisms” in the investigation of the factors that determine the boundaries of microbial survival and growth on Earth and in the space environment, by virtue of the fact that they are components of microbial mat model systems which are more and more used to elucidate Earth’s past and the detection of life’s biosignatures. [less ▲]

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See detailAdaptations to extreme conditions: the strategy of the Antarctic cyanobacterium ULC007
Lara, Yannick ULiege; Durieu, Benoit ULiege; Javaux, Emmanuelle ULiege et al

Conference (2018, December 18)

In Polar regions, freshwater ecosystems range from cryoecosystems and ice shelf meltwater ponds to perennially ice-covered lakes where conspicuous benthic microbial mat communities constitute most of the ... [more ▼]

In Polar regions, freshwater ecosystems range from cryoecosystems and ice shelf meltwater ponds to perennially ice-covered lakes where conspicuous benthic microbial mat communities constitute most of the biomass. In these mats, cyanobacteria form the matrix in which other microorganisms can live, and where they are the key primary producers and main drivers of the carbon and food webs. To provide a better understanding of the survival strategies of Polar mat-forming cyanobacteria, we investigated the genome of a strain of the widely distributed Antarctic cyanobacterium, Phormidium priestleyi ULC007. We used high-throughput sequencing technologies to investigate its geographic distribution and genome evolution. More precisely, we investigated the abundance of genes involved in cold adaptation and circadian oscillation. In cold habitats, low temperatures lead to the success of particular organisms featuring adaptations to molecular and cellular disturbances such as higher rigidity of membranes, reduction of enzyme-catalyzed reactions, and reduction of solute transport. Our main results underline the importance of functional categories of genes involved in the production of key molecules for the survival of P. priestleyi in cold conditions (e.g. synthesis of exopolysaccharides, chaperone proteins, fatty acids and phospholipids). [less ▲]

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See detailRéflexions sur l’enseignement de la trigonométrie
Henry, Valérie ULiege; Pierard, Marie

Conference (2018, December 18)

Historiquement, la trigonométrie est apparue pour les besoins de l’astronomie : on travaillait avec des angles dans des cercles pour marquer la position des étoiles dans le ciel. La trigonométrie s’est ... [more ▼]

Historiquement, la trigonométrie est apparue pour les besoins de l’astronomie : on travaillait avec des angles dans des cercles pour marquer la position des étoiles dans le ciel. La trigonométrie s’est développée dans les triangles plus tard, de manière tout à fait indépendante. Il faudra attendre plusieurs siècles pour que les cercles et les triangles soient réunis dans un même objet : le cercle trigonométrique. Depuis 150 ans, le savoir à enseigner en trigonométrie ne cesse d’évoluer alors que le savoir savant est très stable. Aujourd’hui, l’enseignement de la trigonométrie ne suit pas du tout la chronologie historique et on constate que certaines difficultés rencontrées par les élèves pourraient être liées à l’introduction rapide du cercle trigonométrique dans le curriculum. Nous cherchons à réduire ces difficultés en repensant le rôle du cercle trigonométrique dans l’apprentissage des rapports trigonométriques sinus, cosinus et tangente. Notre travail devrait aboutir à une séquence de cours expérimentable dans des classes du secondaire. [less ▲]

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See detailFungiplex Candida et Aspergillus
Hayette, Marie-Pierre ULiege

Conference (2018, December 17)

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See detailAn expenditure spillover model with endogenous place of consumption decision
Denomerenge, Jonathan ULiege; Starck, Vincent

Conference (2018, December 17)

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See detailModeling non-stationary operational risk: A smooth-transition distributional regression approach
Hambuckers, Julien ULiege; Kneib, Thomas

Conference (2018, December 15)

The distribution of operational losses is particularly challenging to model, due to the high probability of extremes and the existence of time-varying structural dependencies. In particular, operational ... [more ▼]

The distribution of operational losses is particularly challenging to model, due to the high probability of extremes and the existence of time-varying structural dependencies. In particular, operational loss severity distribution is often concerned with changes in regulations, business cycles or financial crises that affect the dependence structure with potential predictors. To help accounting for this empirical feature, we introduce smooth-transition (ST) Generalized Pareto (GP). In this time-varying regression model, the parameters of the GP distribution are related to explanatory variables through a regression function, which depends itself on a time-varying predictor of structural changes. First, we discuss the computational challenges associated to this class of models. Then, we propose several estimation strategies and investigate their finite sample properties in a simulation study. Eventually, we use our findings to study the time-varying dependence structure of monthly operational risks with market volatility and past extreme events. [less ▲]

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See detailAre morphological traits explaining swimming performances of several deep-sea sharks from New Zealand?
Finet, Elliot; Pinte, Nicolas; Frederich, Bruno ULiege et al

Conference (2018, December 15)

Sharks have been present in oceans for more than 400 millions of years and have survived several mass extinctions (Devonian, Permian, Triassic and Cretaceous). Although some morphological features are ... [more ▼]

Sharks have been present in oceans for more than 400 millions of years and have survived several mass extinctions (Devonian, Permian, Triassic and Cretaceous). Although some morphological features are well preserved between all shark species (cartilaginous skeleton, lack of swim bladder, renewable teeth,...), they show remarkable adaptations to their different lifestyles. Among sharks, data regarding deep-sea species are scares, and especially about their ecology. In this work we focused on deep-sea sharks’ swimming performances. Indeed, as active predators, shark swimming capabilities take part in several essential behaviours such as hunting, escaping, home range, migratory behaviours. While the swimming performances are well studied on shallow-water sharks, only limited data about their deep-sea counterparts are available; at most it is suggested they are slow and lazy swimmers. However, recent study shows significant differences of swimming cruise speed between eight deep-sea sharks from New Zealand. Several studies about the shallow-water species show a high importance of morphological traits related with the swimming performances. Here we investigate what are the morphological traits that could take part in deep-sea sharks swimming cruise speed previously observed. We also measure the traits differences between species and correlate it with their phylogeny. Thirty morphological traits from eight deep-sea species and one surface species (control) were measured. These morphological traits include classical measurements of length from the fins or the body but also geomorphological features and ratios for the rostrum and different fins. First results of the statistical analysis seem to show out that variables like area of the pectoral or caudal fins (which play a major role for locomotion of surface sharks), are not the main factors influencing speed of deep-sea sharks. Conversely, rostrum length, distance between the first and the second dorsal fin with the caudal fin, seem to be factors separating the different speed groups. [less ▲]

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See detailLe Temple et le cantique de Syméon en Luc 2, 29-32. Analyse d’une métaphore poétique opérée par l’auteur du 3e Évangile
Bassilua Nzuzi, Anicet ULiege

Conference (2018, December 15)

The Bible contains a number of religious songs designated by Hebrew terms, then Greek (hymnos, ôdè, psalmos), often of similar meaning. The Old Testament provides many examples through the Psalter. In the ... [more ▼]

The Bible contains a number of religious songs designated by Hebrew terms, then Greek (hymnos, ôdè, psalmos), often of similar meaning. The Old Testament provides many examples through the Psalter. In the New Testament, it is attested (Lehmann, 2009) that Jesus and his disciples had an intimate knowledge of the Psalms. These songs of the Old Testament were particularly used in the liturgy of the Temple of Jerusalem, especially for sacrifices, feasts, processions. Their use has even been extended to the field of private religion (Ibid.). It turns out that these texts inspire some others in the New Testament, like the four hymns that appear at the beginning of Luke's gospel (1,46-55: Magnificat; 1,68-79: Benedictus 2, 14: Gloria: and 2, 29-32: Nunc Dimittis). Of these four hymns, that of Simeon (the Nunc Dimittis) is pronounced in the Temple thus opening a track that links the capture of its contours in consideration of the context of its execution, the sanctuary. We propose to analyze this link. Indeed, we know that the first two chapters of the Gospel of Luke function as the « narrative beginning » of the entire « work to Theophilus » - Luke-Acts - (Gerber, 2009) and that in these two chapters the information provided on the birth of Jesus was carefully chosen and placed as the foundation of God's soteriological project presented in this book. As a result, the four songs contained in this sequence are part of this literary strategy of the author of Luke (Dillon, 2006) who, unlike Paul or Marc who present the work of salvation through the theology of the cross (ie the death of Jesus), places the moment of salvation in his birth. This birth is thus declined in words, miracles and acts of compassion (Marguerat, 2008) who call, for the characters chosen by Luke, the praise. This is how these words are placed especially in the mouth of Simeon. And their significance deserves a stop for a moment. The formula εὐλόγησεν τὸν θεὸν (v. 28) placed at the beginning of the hymn seems to indicate that the following point of view is that of the author (Lohfink, 1994); the verb ὁράω (see) which qualifies the wonder realized by God vis-à-vis Simeon does not appear as a fruit of chance, etc. As it can be seen, the combination of spoken words with the character who pronounces it (Simeon, pious man) - obviously the song of Simeon has a parallel in the book of Jubilee (Jub 22: 7-9) and in Cicero ( The Republic, VI, 9) - and the place where they are pronounced (the Temple) tends to suggest an additional layer - if not the main one - of the meaning that Luke proposes to Nunc Dimittis at least in the understanding that he wants to give to this event occurred at the Temple (the meeting between Jesus and Simeon). By putting this text in parallel with others of the Old Testament - the New Testament provides many cases of proofreading of the ancient texts operated by the first Christians (1st - 2nd Century) - as the one who reports the vision (see) of Ezekiel of the departure of the glory of God from the Temple (Ez, 10), we find an illumination of this soteriological dimension that Luke proposes in his work. Jesus, qualified of your salvation (τὸ σωτήριόν σου) in the mouth of Simeon, is seen as the return of the glory of God in the same Temple. So, we can clearly see that, starting from these elements, the topological anchoring of the performance of Simeon's song, the Temple, makes the latter (the Temple) a metaphor of the hymn itself. [less ▲]

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See detailDiversification and functional evolution in reef fishes: The generalist feeding guild is not an evolutionary sink
Gajdzik, Laura; Aguilar-Medrano, Rosalia; Frederich, Bruno ULiege

Conference (2018, December 15)

Reef fishes have diversified into thousands of species that fill various types of ecological niches, contributing to the tremendous biodiversity of reef ecosystems. Yet, the dynamics of this diversity ... [more ▼]

Reef fishes have diversified into thousands of species that fill various types of ecological niches, contributing to the tremendous biodiversity of reef ecosystems. Yet, the dynamics of this diversity remain understudied, especially the evolutionary relationships between the different functional traits, which reflect life strategies and ecosystem roles of organisms. Here, we explore how one functional trait, the feeding habit, impacts the dynamics of species diversification and functional evolution. Using comparative phylogenetic methods in conjunction with trophic and functional datasets, we analyse the functional evolution of two major radiations of reef fishes, the wrasses (Labridae) and the damselfishes (Pomacentridae). We demonstrate that feeding habits play a key role in the evolution of the rest of functional diversity. The nature and the diversity of functional roles hosted by fish in reef ecosystems are tightly linked to their feeding attributes. Counter to a simple prediction of ecological opportunism, we found that “generalist” feeding guilds (i.e. those composed of species feeding on food sources from the whole bentho-pelagic compartment) do not show higher rates of functional diversification and do not necessarily display higher levels of functional diversity. Furthermore, in contrast to recent macroevolutionary studies on mammals and birds, we argue that these “generalist” guilds of fishes represent the basis of future diversity and cannot be considered as evolutionary sinks or as "dead-ends". These findings clearly re-define our view on the ecological and evolutionary roles played by generalist feeding guilds. [less ▲]

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See detailTrophic plasticity of scleractinian corals under contrasted environmental conditions: evidence from stable isotope analysis
Sturaro, Nicolas ULiege; Hsieh, Yun Li Eric; Liu, Ling-Wen et al

Conference (2018, December 15)

Most scleractinian corals can derive nutrition either autotrophically or heterotrophically, which allows them to use diverse trophic pathways. Therefore, when facing environmental changes, these organisms ... [more ▼]

Most scleractinian corals can derive nutrition either autotrophically or heterotrophically, which allows them to use diverse trophic pathways. Therefore, when facing environmental changes, these organisms are expected to demonstrate an intrinsic ability to acclimatise through trophic plasticity. Despite the ecological importance of these corals, our understanding of their trophic plasticity is currently impaired by a lack of rigorous research approaches; a failure to consider the intraspecific variability of coral species and an oversimplification of the proxies of heterotrophic habits (e.g. corallite diameter). In order to understand how trophic plasticity could allow them to acclimatise, this study proposed to assess the trophic plasticity of morphologically contrasted coral species (e.g. Stylophora pistillata, Porites sp, Isopora palifera). We determined the stable isotope ratios of carbon and nitrogen in the coral host tissues and algal symbionts and compared these in corals inhabiting areas around Taiwan characterised by contrasted temperature (from high to low latitudes) and light levels (from shallow to mesophotic waters). For each area, we evaluated the intraspecific trophic variability by estimating and comparing coral isotopic niches as a proxy for trophic niches. Our results on Stylophora pistillata revealed no overlap of the isotopic niches for the host and symbiont from different locations, suggesting that these coral colonies are supported by different core resources. Moreover, the isotopic niche of higher latitude coral colonies was larger than those from the lower latitudes, highlighting a certain trophic plasticity that may be related to more variable environmental conditions in the higher latitudes. Analyses of additional species and locations will provide essential insights into the trophic plasticity of scleractinian corals and how these species might adjust their nutrition in response to environmental changes. [less ▲]

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See detailFlexible habitat use of stonechats Saxicola torquatus dealing with different anthropogenic novel environments
Gailly, Robin ULiege; Cousseau, Laurence; Titeux, Nicolas et al

Conference (2018, December 15)

Organisms may respond to rapid human induced environmental changes by adapting their habitat requirements through behavioural flexibility. In human-modified landscapes from southern Belgium, recent ... [more ▼]

Organisms may respond to rapid human induced environmental changes by adapting their habitat requirements through behavioural flexibility. In human-modified landscapes from southern Belgium, recent management activities have generated structurally different and novel land-use types that are now occupied by a number of farmland bird species. However, as birds rely on environmental cues to select their habitat, they can be subject to maladaptive habitat selection if these cues become uncoupled from the underlying habitat quality. We therefore used the European Stonechat Saxicola torquatus as a model species to compare the relative attractiveness and breeding quality of the three main land-use types occupied by farmland birds (i.e. intensive grassland, Christmas tree plantations and clear-cut patches in plantation forests) in order to test whether habitat selection is adaptive in a changing landscape. Between 2014 and 2018, we examined the settlement pattern of territorial males to measure habitat preference and we recorded key parameters reflecting reproductive performances and individual survival to assess the quality of the three land-use types for the reproduction of the stonechats. Our results indicate that stonechats preferentially settle in clear-cut patches where they produce lower-quality offspring due to a gradual decrease of nestling body conditions during the breeding season. However, we found that this has no consequence on recruitment rates, because first-year survival was not related to nestling body conditions in our study system. As other parameters of reproductive performances, adult survival and first-year survival were similar between the three land-use types, we concluded that stonechats are capable of flexible habitat use and may find breeding opportunities of similar quality in the three land-use types although these strongly differ in terms of vegetation structure and management. Moreover, our results highlight the importance of measuring multiple fitness components to assess habitat quality in a comprehensive way. [less ▲]

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See detailOn the path to recovery : characterizing inbreeding in the European Bison with a model-based approach
Druet, Tom ULiege; Flori, Laurence; Olénski, Kamel et al

Conference (2018, December 15)

When two alleles from the same individual descend from a single allele in an ancestor, they form an homozygous-by-descent (HBD) or autozygous segment. Increased autozygosity is frequently associated with ... [more ▼]

When two alleles from the same individual descend from a single allele in an ancestor, they form an homozygous-by-descent (HBD) or autozygous segment. Increased autozygosity is frequently associated with negative effects on fitness. Population bottlenecks or founder effects can dramatically increase autozygosity levels. We recently developped a model-based approach to identify HBD segments that is particularly valuable when marker information is sparser (e.g., low-fold sequencing experiments, low marker density, marker recruitment bias). This hidden Markov model is also useful when the data is not uniform (variable genotyping errors, marker spacing or recombinations rates). Overall the approach is beneficial in situations encountered in wild organisms. Here, we use our model to characterize individual autozygosity in the restored European Bison. After complete extinction in the wild, restoration programs started as soon as 1929 using only twelve founders kept in European zoos and private breeding centers and leading to the sucessfull restoration of two genetic lines, the lowland and lowland-Caucasian lines. To characterize inbreeding we used a bovine genotyping array encompassing more than 700,000 SNPs. Only 22,602 SNPs were conserved after data filtering. Despite the sparse marker information, we estimated high inbreeding levels (0.30 to 0.40) consistent with pedigree estimates. Many long HBD segments (up to 120 Mb) associated with recent common ancestors, approximately 4 to 32 generations in the past, were identified. Their distribution is compatible with a recent bottleneck. The results obtained with this sparse genotyping data were validated with whole genome sequence data from two individuals. Overall, the presented approach is still efficient when the number of informative markers is reduced compared to traditional high-density genotyping arrays and can also be used with genotyping-by-sequencing data. The same strategy can be applied to wild populations for which the history is not well documented. [less ▲]

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See detailVertebrae are the backbone of cetacean diversity: How morphological innovations sustained dolphin explosive radiation
Gillet, Amandine ULiege; Frederich, Bruno ULiege; Parmentier, Eric ULiege

Conference (2018, December 15)

With approximately 90 living species, whales, dolphins and porpoises represent the most diverse clade of extant marine tetrapods. This high level of taxonomic diversity has been often related to ocean ... [more ▼]

With approximately 90 living species, whales, dolphins and porpoises represent the most diverse clade of extant marine tetrapods. This high level of taxonomic diversity has been often related to ocean restructuring that resulted in an explosive radiation of oceanic dolphins within the past 10 Ma. However, the environmental factor hypothesis can be restrictive as it does not entirely explain how organisms have faced environmental constraints suggesting that other factors could also explain this burst of diversification. In marine taxa such as sharks and ichthyosaurs, morphological variations have been linked to several life-styles which have sustained their diversification in different adaptive zones. The aim of our study is to establish the relationship between the morphology of the axial skeleton of cetaceans, their ecology and their diversification. By combining the most extensive morphological dataset describing the axial skeleton of 73 cetacean species with phylogenetic comparative methods, we demonstrate that extant cetaceans have followed two distinct evolutionary pathways in relation to their ecology. Most oceanic species evolved towards an increased body size leading to gigantism in baleen whales. Interestingly, dolphins have invested another way. While riverine and coastal species exhibit a small body size, lengthened vertebrae and a low vertebral count, small oceanic dolphins show an extremely high number of short vertebrae. We discuss how these modifications have operated as key innovations that contributed to the explosive radiation of dolphins. [less ▲]

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See detailÉlevage ovin en Algérie: Analyse de situation
Moula, Nassim ULiege

Conference (2018, December 15)

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See detailWhat do the Brazilian piranhas have to tell us?
Raick, Xavier ULiege; Huby, Alessia ULiege; Kurchevski, Gregório et al

Conference (2018, December 15)

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See detailThe SMB Model Intercomparison (SMBMIP) over Greenland: first results
Fettweis, Xavier ULiege

Conference (2018, December 14)

We will present here the first results of the SMB Model intercomparison (SMBMIP) over the Greenland Ice sheet. For the first time, all the modeled SMB estimations over the current climate (1980-2016) will ... [more ▼]

We will present here the first results of the SMB Model intercomparison (SMBMIP) over the Greenland Ice sheet. For the first time, all the modeled SMB estimations over the current climate (1980-2016) will be compared at the pixel scale, on the same grid (1km), on the common ice sheet mask, at the monthly timescale and by using the same forcing (ERA-Interim). The SMB components from RCMs, GCMs and PDD models will be compared with ice core measurements, the SMB data base from Machguth et al. (2016) as well as passive microwave satellite derived melt extent, in the aim of identifying poorly documented areas where model results diverge and where additional measurement campaigns will be needed. [less ▲]

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See detailThe EU Institutions’ Interpretations of the States’ Europeanness: Discourse and Relevance in Light of the Recent Internal Events
Niessen, Annie ULiege

Conference (2018, December 13)

According to Article 49 of the Treaty on the European Union, a state wishing to join the EU must be “European”. In other words, Europeanness is the first requirement for a state to be considered eligible ... [more ▼]

According to Article 49 of the Treaty on the European Union, a state wishing to join the EU must be “European”. In other words, Europeanness is the first requirement for a state to be considered eligible for EU membership. Although written into EU law since the Treaty of Rome (Article 237 §1), the qualifier “European” has never been explicitly or institutionally defined, despite the fact that it may encompass geographical, cultural, historical or else political references. Yet, the EEC/EU institutions have had to interpret the states’ Europeanness, especially in the course of enlargements and membership applications. Relying on a textual and discursive analysis of recent documents and older records held in the Historical Archives of the EU in Florence, this paper investigates and analyses the various institutional interpretations that have been provided by the EEC/EU institutions by focusing on specific (formal and informal) requests that raised eligibility issues. Building on these interpretations, it then discusses the guidelines that they can provide for enlargements, as well as the relevance of these interpretations that may be jeopardized by the recent internal events that the EU has to handle, such as Britain’s withdrawal from the EU or the democratic issues in some eastern countries. [less ▲]

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See detailCrystal chemistry and polymorphism of an iron-tungsten mixed oxide
Caubergh, Stéphane ULiege; Jungers, Thomas ULiege; Mahmoud, Abdelfattah ULiege et al

Conference (2018, December 13)

Iron tungstate Fe2WO6 attracts increasing interest in two areas of applications due to its photoelectrochemical behaviour. Fe2WO6 is studied either as a photocatalyst for degradation of environmental ... [more ▼]

Iron tungstate Fe2WO6 attracts increasing interest in two areas of applications due to its photoelectrochemical behaviour. Fe2WO6 is studied either as a photocatalyst for degradation of environmental pollutants or as a photoanode for water oxidation in tandem devices. Recently, some of its magneto-dielectric properties have been reported but its magnetic and electric properties remain nebulous. Indeed, Fe2WO6 iron tungstate exists as two or three crystal structures with different organizations of the FeO6 and WO6 octahedra. The conditions of polymorphism are still unclear: structures were reported in the literature for only two of the three polymorphs (α and γ) and very little is known about the third polymorph (β). In the present work, we could synthesize for the first time a complete set of the three polymorphs as single-phase products by spray-drying, thereby confirming the existence of the β-polymorph. We revised the structural model for the α-polymorph and solved the structure of the β-polymorph. The new procedure of synthesis also allowed us to control and tune the Fe/W ratio and investigate the possibility for a solid solution domain. The final products were characterized by means of X-Ray Diffraction (synchrotron data), Rietveld refinement, Scanning Electron Microscopy and 57Fe Mossbauer spectroscopy. [less ▲]

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See detailOne Step Hydrothermal Synthesis of Fe1.19(PO4)(OH)0.57(H2O)0.43 composite cathode material and Its Electrochemical Properties in Li-Ion Batteries
Mahmoud, Abdelfattah ULiege; Karegeya, Claude; Sougrati, Moulay Tahar et al

Conference (2018, December 13)

Lithium-ion batteries (LIBs) have been widely applied as a power source for portable and stationary energy storage systems. In this work, we report the electrochemical performance of FPHH/CB and FPHH/CNT ... [more ▼]

Lithium-ion batteries (LIBs) have been widely applied as a power source for portable and stationary energy storage systems. In this work, we report the electrochemical performance of FPHH/CB and FPHH/CNT cathode materials for Li-ion batteries where FPHH represents Fe1.19(PO4)(OH)0.57(H2O)0.43 while carbon black (CB) and carbon nanotubes (CNT) were used as precursors in the one-pot hydrothermal synthesis. We show that the addition of conducting carbon black into the solution has a strong influence on reducing the particle size and tailoring their morphology. Thanks to its favorable microstructural characteristics, the FPHH-10 wt% C and FPHH-20 wt% C materials exhibited good performance [1]. The CNT also improve the performance of FPHH such as capacity retention. The study of the reaction mechanism of FPHH/CNT during cycling by combining operando XRD and 57Fe Mössbauer spectroscopy (Figure 1) shows that the insertion mechanism is a monophasic reaction with 10% volume variations associated to the Fe3+/Fe2+ redox reaction [2]. Acknowledgements A. Mahmoud is grateful to University of Liege and FRS-FNRS for the grants and thanks to the Walloon region for a Beware Fellowship Academia 2015-1, RESIBAT n° 1510399. Part of this work was supported by the Walloon Region under the “PE PlanMarshall2.vert” program (BATWAL – 1318146). References 1. C. Karegeya, A. Mahmoud, R. Cloots, B. Vertruyen, F. Boschini, Electrochimica Acta 250 (2017) 49-58. 2. A. Mahmoud, C. Karegeya, M. T. Sougrati, J. Bodart, B. Vertruyen, R. Cloots, P-E. Lippens, F. Boschini. ACS Applied Materials and interfaces 10 (2018) 34202-34211. [less ▲]

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See detailLes travailleurs de plateformes : statut de salariés, d'indépendants ou troisième voie?
Kéfer, Fabienne ULiege; Cordier, Quentin ULiege

Conference (2018, December 12)

What social status could the legislator develop to secure the professional careers of platform workers? The "third way", known in other countries (the conference is based on a comparative law study), is ... [more ▼]

What social status could the legislator develop to secure the professional careers of platform workers? The "third way", known in other countries (the conference is based on a comparative law study), is unsatisfactory. The more advantageous status of employee is very complex to set up given the great freedom enjoyed by most platform workers. The self-employed status could be based on what exists for hospital doctors, commercial agents, etc. [less ▲]

Detailed reference viewed: 34 (1 ULiège)
See detailAnalysis of trends in total stratospheric ozone
Salawitch, Ross J; Tribett, W R; Wales, P et al

Conference (2018, December 12)

Time series of total column ozone have exhibited unusual, unexpected behavior over the past few years. In year 2016, total ozone was lower than expected based on some forecasts that utilize the time ... [more ▼]

Time series of total column ozone have exhibited unusual, unexpected behavior over the past few years. In year 2016, total ozone was lower than expected based on some forecasts that utilize the time evolution of equivalent effective stratosphere chlorine (EESC). Conversely, total column ozone exhibited a sharp rise in 2017. The existence of a new formulation (i.e., Engel et al., ACP, 2017) for the fractional release factors (FRFs) used to find EESC for mid-latitude lower stratospheric air parcels, the contribution of very short-lived chlorine and bromine compounds to EESC, as well as possible temporal variations in tropospheric column ozone compound the difficulty in establishing a quantitative relationship between the time evolution of EESC and stratospheric ozone. This presentation will consist of an analysis of the ~40 year record of total column ozone measured from space (e.g., version 8.6 of the NASA SBUV Merged Ozone Data Set at the time of abstract submission), along with: a) stratospheric chlorine loading from various satellite instruments as well as the long-term ground-based measurement from Jungfraujoch, Switzerland; b) various other quantities that affect the long-term evolution of stratospheric ozone (e.g., total solar irradiance, stratospheric optical depth, quasi-biennial oscillation of the direction of tropical stratospheric winds) c) estimates of tropospheric column ozone to assess our understanding of trends in total stratospheric ozone. Preliminary results indicate better quantitative understanding is attained for the new FRFs, which lead to a more gradual recovery of total stratospheric ozone than is found using the old FRFs. Reference: Engel, A. et al., ACP, 18, 601619, doi:10.5194/acp-18-601-2018, 2018. [less ▲]

Detailed reference viewed: 33 (7 ULiège)