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See detailMéthodologies créatives de la recherche en sciences du jeu : le cas de Super Mario Maker
Delbouille, Julie ULg; Hurel, Pierre-Yves ULg

Conference (2017, May 19)

Cette communication revient sur les premiers résultats de démarches méthodologiques créatives mises en place au sein du Liège Game Lab. Tentant de faire la synthèse entre l'ancrage principalement ... [more ▼]

Cette communication revient sur les premiers résultats de démarches méthodologiques créatives mises en place au sein du Liège Game Lab. Tentant de faire la synthèse entre l'ancrage principalement théorique des recherches francophones en sciences du jeu et l'orientation pratique des sciences informatiques des game labs anglophones, cette méthodologie s’inspire également des expérimentations d’autres centres de recherches tels que l’Utrecht Game Lab. L’expérience créative qui sera l’objet de cette communication s’appuie sur le dispositif Super Mario Maker. Au cours d'ateliers d’analyse et de création exploitant ce jeu, nous avons formulé cette question de recherche : « Est-il possible d'envisager l'univers fictionnel de la franchise comme un langage ? Et si oui, quelles en sont les modalités ? ». Au-delà de la confrontation de cette problématique à un outil de création vidéoludique (et les résultats qui en ont découlé), cette expérience nous a également permis de démystifier notre objet d’étude, et d’engager une dynamique de recherche collective. [less ▲]

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See detailLa santé mentale des étudiants en première année universitaire : du risque à la résilience
Glowacz, Fabienne ULg; Schmits, Emilie ULg

Conference (2017, May 19)

Les étudiants de première année universitaire sont soumis à un stress important : l’entrée à l’université met en jeu une série de changements touchant les différents domaines de la vie étudiante et impose ... [more ▼]

Les étudiants de première année universitaire sont soumis à un stress important : l’entrée à l’université met en jeu une série de changements touchant les différents domaines de la vie étudiante et impose des défis d’apprentissages : de savoir (la matière elle-même et le rapport au savoir attendu de l’étudiant gagnant en complexité et en amplitude et de nouveaux repères et liens sociaux. Des études ont constaté des scores élevés de détresse émotionnelle chez les étudiants par rapport aux populations non étudiantes, et de symptômes dépressifs depuis leur entrée à l’université. Cependant peu d’étudiants demandent de l’aide et reçoivent un traitement, et nombreux sont ceux qui ont tendance à ne pas percevoir un besoin d’aide. Nous avons mené une enquête en ligne ciblant les étudiants de première année de l’ULg, plusieurs dimensions de la santé mentale ont été évaluées sur base d’échelles d’auto-évaluation (Beck Depression Inventory Short Form – BDI-SF ; Liebowitz Social Anxiety Scale – LSAS, – Symptom Check-List de Dérogatis – SCL-90R). Nous nous sommes également intéressés à la résilience des étudiants et aux facteurs la soutenant, la résilience pouvant être considérée comme le maintien d’une santé mentale «suffisamment bonne » dans ce contexte de transition à l’enseignement supérieur. Les premiers résultats de l’enquête seront présentés à partir de modélisations de résilience ouvrant des pistes de prévention et d’action en vue d’accroître le sentiment de bien-être des étudiants et d’améliorer leur santé mentale, tout en soutenant leur cheminement scolaire. [less ▲]

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See detailLes souvenirs auxquels on ne croit plus
Vanootighem, Valentine ULg

Conference (2017, May 19)

Ces dernières années, plusieurs études ont démontré l’existence de « souvenirs » auxquels on ne croit plus (nonbelieved memories, NBMs). Typiquement, un NBM est une représentation vivace et précise d’un ... [more ▼]

Ces dernières années, plusieurs études ont démontré l’existence de « souvenirs » auxquels on ne croit plus (nonbelieved memories, NBMs). Typiquement, un NBM est une représentation vivace et précise d’un évènement que le participant a cru avoir vécu pendant un certain temps mais auquel il a un jour cessé de croire, et ce pour différentes raisons possibles (p.ex., feedback social, plausibilité de l’évènement). Dans la littérature, on constate qu’il ne s’agit pas d’un phénomène rare puisqu’il concernerait environ 20 pourcents des personnes interrogées. Aussi, quel que soit l’âge des participants, les travaux antérieurs montrent que ce type de souvenirs concernait surtout des évènements vécus durant l’enfance. Afin d’évaluer si les NMBs sont réellement spécifiques à l’enfance, nous présenterons les résultats d’une récente étude au cours de laquelle nous avons examiné l’influence de l’exemple donné dans la consigne sur l’incidence des NBMs et l’âge auquel les évènements associés ont été vécus. [less ▲]

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See detailUn portrait de la qualité des interactions enseignant/enfants pour soutenir le développement langagier à l’école maternelle
Leroy, Sandrine ULg; Bergeron-Morin, Lisandre ULg; Desmottes, Lise ULg et al

Conference (2017, May 19)

L’environnement scolaire, et plus particulièrement l’éducation préscolaire (enseignement maternel en Belgique), constitue un contexte privilégié pour soutenir le développement du langage et de la ... [more ▼]

L’environnement scolaire, et plus particulièrement l’éducation préscolaire (enseignement maternel en Belgique), constitue un contexte privilégié pour soutenir le développement du langage et de la communication des enfants. Il a en effet été démontré que la qualité des interactions en contexte préscolaire joue un rôle protecteur sur le développement langagier des enfants plus vulnérables, issus de milieux précarisés (Burchinal et al., 2010; Simard et al., 2013). En effet, à l’école maternelle, les enfants peuvent bénéficier quotidiennement d’interactions verbales riches et diversifiées, non seulement avec leur enseignant, mais également avec leurs pairs (Blain-Brière et al., 2014). Dès lors, les enseignants de maternelle occupent une place privilégiée pour favoriser et entretenir des interactions de qualité, propices au développement langagier. Cependant, des études internationales (Bouchard et al., 2010; Piasta et al., 2012) ont montré que la qualité des pratiques éducatives, surtout en matière de soutien langagier, n’est pas toujours optimale, ayant pour conséquence des effets plus modestes sur le développement langagier des enfants, surtout chez les plus vulnérables (Dickinson et al., 2011). Bien que l’importance de soutenir le langage et la communication des enfants en milieu préscolaire soit établie, aucune étude n’a, à ce jour, été réalisée en Belgique francophone. Or, dresser un portrait des pratiques utilisées dans les classes de maternelle pour soutenir le développement langagier des enfants apparait comme essentiel. L’objectif du travail présenté est donc de documenter la qualité des interactions et l’utilisation de stratégies de soutien langagier par les enseignants dans les classes de deuxième maternelle en Belgique francophone, auprès enfants âgés d’environ 4 ans. Pour ce faire, des observations in vivo sont réalisés dans 25 classes de deuxième maternelle afin d’évaluer la qualité des interactions enseignant/enfants à l’aide du CLASS® Pre-K (Classroom Assessment Scoring System®, Pianta et al., 2008). Trois domaines sont pris en considération : le soutien émotionnel, l’organisation de la classe et le soutien aux apprentissages qui inclut le modelage langagier. Une analyse des stratégies de soutien langagier utilisées par l’enseignant complète le portrait réalisé dans chacune des classes. Ces données sont analysées en relation avec l’expérience professionnelle des enseignants, le nombre d’enfants dans la classe, l’indice socio-économique des écoles et le type d’activités proposées. Les résultats obtenus amènent une réflexion sur les modalités qui peuvent permettre de mieux soutenir le développement langagier des enfants dans leur contexte éducatif, plus particulièrement auprès des enfants plus vulnérables. [less ▲]

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See detailAnalysing operando Mössbauer spectra of battery materials: a chemometric approach to the study of NaFeO2 as positive electrode material for Na-ion batteries
Stievano, Lorenzo; Sougrati, Moulay Tahar; Darwiche, Ali et al

Conference (2017, May 19)

Among the possible positive electrode materials for Na-ion batteries, iron-based oxides have been regarded as promising solids for the reversible insertion/deinsertion of Na on the basis of their ... [more ▼]

Among the possible positive electrode materials for Na-ion batteries, iron-based oxides have been regarded as promising solids for the reversible insertion/deinsertion of Na on the basis of their abundance in the Earth’s crust. In particular, O3-type NaFeO2, easily prepared from the reaction of iron oxide and Na2CO3 at 600°C, has been identified as the most interesting one from the viewpoint of both gravimetric and volumetric energy density.[1–3] Na/NaFeO2 cells cycle through a relatively flat potential plateau between 3.3 and 3.4 V vs. Na+/Na, commonly associated with the Fe4+/Fe3+ redox couple. However, if cycling is extended above 3.5 V, other irreversible reaction plateaux appear, which completely inactivate the material. 57Fe Mössbauer spectroscopy is thus a method of choice for the study of both (1) the cycling mechanism and (2) the irreversible reactions occurring above 3.5 V. In this work, operando 57Fe Mössbauer spectra were collected during the electrochemical cycling of NaFeO2 vs. Na metal using a specifically designed in situ cell,[4] and analysed using an alternative and innovating data analysis approach based on chemometric tools such as Principal Component Analysis (PCA) and multivariate curve resolution (MCR).[5,6] This approach, which allows the unbiased extraction of all possible information from the operando data, enabled the stepwise reconstruction of the “real” spectral components occurring during the cycling of NaFeO2. In this way, a clear description of the electrochemically active iron species could be obtained, allowing a clearer comprehension of the cycling mechanisms of this material vs. sodium. Références : [1] J. Zhao, L. Zhao, N. Dimov, O. Shigeto, T. Nishida, J. Electrochem. Soc. 160 (2013) A3077. [2] H. Yoshida, N. Yabuuchi, S. Komaba, in:, ECS Meet. Abstr. MA2012-02, ECS, Honolulu, 2011, p. 1850. [3] P. Barpanda, Chem. Mater. 28 (2016) 1006. [4] J.-B. Leriche, S. Hamelet, J. Shu, M. Morcrette, C. Masquelier, G. Ouvrard, M. Zerrouki, P. Soudan, S. Belin, E. Elkaïm, F. Baudelet, J. Electrochem. Soc. 157 (2010) A606. [5] R. Tauler, Chemom. Intell. Lab. 30 (1995) 133. [6] A. Voronov, A. Urakawa, W. van Beek, N.E. Tsakoumis, H. Emerich, M. Rønning, Anal. Chim. Acta 840 (2014) 20. [less ▲]

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See detailLa lecture partagée pour améliorer l’entrée dans l’écrit chez des enfants issus de population défavorisée
Maillart, Christelle ULg; Binamé, Florence ULg; Vossius, Line ULg et al

Conference (2017, May 19)

Les enfants issus de populations défavorisées sont à risque de présenter des difficultés d’apprentissage en lecture. Sans intervention appropriée, le décalage entre les performances de ces enfants et leur ... [more ▼]

Les enfants issus de populations défavorisées sont à risque de présenter des difficultés d’apprentissage en lecture. Sans intervention appropriée, le décalage entre les performances de ces enfants et leur pairs persiste voire se creuse avec le temps (Lonigan et al., 2015). Cette communication présente les résultats d’une étude en intervention ciblant la littératie émergente chez de jeunes enfants scolarisés en fin de maternelle. Elle fait partie d’un projet plus large comparant les effets de différentes interventions ciblées 1) sur les précurseurs du calcul, 2) sur des activités psychomotrices ou 3) sur la littératie émergente chez trois groupes d’enfants prése. Pour cette dernière intervention, un groupe de 10 enfants d’âge préscolaire âgés de 51 mois à 70 mois, tous issus d’une école accueillant des enfants issus de milieux socio-économiques faibles, ont participé à une intervention en lecture partagée pendant dix semaines, trente minutes par jour, cinq fois par semaine. La lecture partagée est considérée comme une « bonne pratique » pour le développement de la littératie émergente (National Early Literacy Panel, 2008). Elle cible à la fois des aptitudes concernant le code (conscience phonologique ou connaissance de l’alphabet) et le sens (vocabulaire, syntaxe, grammaire narrative) (Piasta, 2016). Les performances des enfants dans les différentes mesures langagières ou de lecture, évaluées avant et après l’intervention, ont été comparées aux performances obtenues par des enfants ayant participé aux deux autres interventions. Les effets à court terme (pré, post intervention) mais aussi à long terme sur le développement du langage écrit seront présentés, permettant de distinguer des effets d’entrainement spécifique ou plus de stimulation plus globale. [less ▲]

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See detailConclusions
Kéfer, Fabienne ULg

Conference (2017, May 19)

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See detailDu définitif sur du provisoire...
Englebert, Jérôme ULg; Follet, Valérie

Conference (2017, May 18)

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See detailL’influence normative de la Chine en Amérique centrale: quels enjeux stratégiques ?
Wintgens, Sophie ULg

Conference (2017, May 18)

La République populaire de Chine (Chine) est aujourd’hui devenue un partenaire commercial incontournable, un important pourvoyeur d’investissements directs étrangers et un grand fournisseur de prêts ... [more ▼]

La République populaire de Chine (Chine) est aujourd’hui devenue un partenaire commercial incontournable, un important pourvoyeur d’investissements directs étrangers et un grand fournisseur de prêts financiers pour un nombre croissant de pays d’Amérique du Sud. Cette tendance s’observe également de plus en plus en Amérique centrale. L’accroissement de ses échanges économiques et commerciaux avec le Costa Rica, membre du Système d’intégration centraméricain (SICA) et premier pays centraméricain à avoir signé un accord de libre-échange avec Pékin, va de pair avec l’imposition des normes économiques et politiques dont sa politique commerciale internationale est porteuse. Ce constat pose dès lors la question du défi stratégique que représente cette influence normative chinoise pour les normes exportées par l’UE en Amérique centrale. Afin de répondre à cette question, cette communication se propose d’analyser la portée normative de la politique commerciale de la Chine envers l’Amérique centrale, afin de voir si elle est porteuse d’un projet politico-économique régional comparable au modèle d’intégration et de gouvernance régionale déployé par l’Europe communautaire dans le sous-continent. [less ▲]

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See detailAller au spectacle
Brahy, Rachel ULg

Conference (2017, May 18)

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See detailAn exceptional Proterozoic assemblage of organic-walled microfossils and its implications for the early evolution of Eukaryotes
Loron, Corentin ULg; Rainbird, Rob; Greenman, Wilder et al

Conference (2017, May 18)

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See detailThe earliest eukaryotes
Javaux, Emmanuelle ULg

Conference (2017, May 18)

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See detailThe epistemic politics of TA institutionalization and international TA collaboration – a cosmopolitan perspective
Rosskamp, Benedikt ULg

Conference (2017, May 18)

When addressing the issue of further institutionalization of TA, two assumptions need to be empirically confronted and conceptually revisited. A first one considers the evolution of TA as a linear ... [more ▼]

When addressing the issue of further institutionalization of TA, two assumptions need to be empirically confronted and conceptually revisited. A first one considers the evolution of TA as a linear progression leading to new institutional creations in an increasing number of countries. Despite a series of calls for distributed, networked, multi-level and multi-actor TA capacities, the idea of creating more single, national, specialized and dedicated TA organizations remains dominant in TA discourse. A second assumption concerns the rationale of Technology Assessment and its performance in terms of “opening up” and “broadening out” (Ely et al. 2014) or “the reflexivity pathway” (Delvenne 2011), notably by resorting to participatory Technology Assessment. Results from case studies in Wallonia, Portugal and the Czech Republic require reconsidering the above-mentioned evolutionary assumptions for a more complex and paradoxical understanding of the future of TA. While the TA achievements in each case study are still uncertain to a high degree, we can sum up these respective TA developments under the banner of “evidence-based governance”. This particular understanding of knowledge and decision-making is coherent with a simultaneous observed shift away from the institutional deficit of TA (creating new institutions in newcomer countries) to a renewed strategy of resorbing a knowledge deficit (making TA knowledge available to a wider number of countries). This renewed approach to TA collaboration and capacity building increasingly gains traction both from a bottom-up perspective where actors try to organize themselves into a critical mass and in a top-down perspective of neoliberal and austerity policies. In such a constellation, positivistic science provides an evidence-base, which supposedly supports multi-level, multi-actor governance as it allows knowledge produced in one place to travel and serve a wide spectrum of actors and decision-making arenas. The consequences of this shift are crucially important to explore the re-makings and futures of Technology Assessment, as they put to the fore the issue of subsidiarity of both the production and the use of TA knowledge. Finally, we identify a shift from coexistence to a cosmopolitan mode of epistemic subsidiarity (Jasanoff 2013, 2014). The latter raises a series of new theoretical, practical and normative questions for the TA community. [less ▲]

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See detailRadiohead and Prog Rock
Delville, Michel ULg

Conference (2017, May 18)

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See detailNON-INVASIVE ANALYSIS OF POTENTIALLY DYSREGULATED MIRNAS IN ENDOMETRIOSIS
Munaut, Carine ULg; Emonard, Violaine; TIMMERMANS, Marie ULg et al

Conference (2017, May 17)

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See detailL'interpellation stigmatisante comme élément de construction identitaire: le cas "Django Unchained"
Wintgens, Caroline ULg

Conference (2017, May 17)

La polémique apparue autour du film Django Unchained de Quentin Tarantino (2012) permet d’approcher la question de la représentation du stigmate. Mon étude portant sur cette polémique et sur les arguments ... [more ▼]

La polémique apparue autour du film Django Unchained de Quentin Tarantino (2012) permet d’approcher la question de la représentation du stigmate. Mon étude portant sur cette polémique et sur les arguments y étant mobilisés a montré que c’est la représentation d’éléments issus de la culture afro-américaine, ayant participé à la construction d’une identité pour les individus porteurs d’un stigmate ethnique, qui est particulièrement mise en cause. La polémique devient dès lors le lieu d’une resignification des attributs liés au stigmate et d’une réaffirmation de la culture de résistance élaborée autour de celui-ci par ceux qui en sont porteurs. Le terme Nigger et sa présence excessive dans le film ont notamment été relevés par de nombreux internautes. C’est dans ce cadre que nous approcherons la question toujours centrale de l’interpellation stigmatisante, en tant qu’elle semble à la fois devenir le lieu d’une réaffirmation identitaire et permettre l’émergence d’une « réponse habilitante » (Butler, 2008). [less ▲]

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See detailImplementation of SFC for the quality control of pharmaceuticals
Dispas, Amandine ULg; Andri, Bertyl ULg; Lebrun, Pierre ULg et al

Conference (2017, May 17)

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See detailLe manuel de grammaire latine de Dosithée : quelle méthode d'apprentissge ?
Rochette, Bruno ULg

Conference (2017, May 15)

Contrairement aux autres manuels de grammaire latine destinés aux hellénophones, comme ceux de Charisius, Diomède et Priscien qui travaillent dans la pars Orientis pour des hellénophones, l’Ars grammatica ... [more ▼]

Contrairement aux autres manuels de grammaire latine destinés aux hellénophones, comme ceux de Charisius, Diomède et Priscien qui travaillent dans la pars Orientis pour des hellénophones, l’Ars grammatica de Dosithée est accompagnée d’une traduction grecque. La présence de cette traduction, qui ne concerne toutefois pas toute la grammaire, mais seulement environ la moitié du texte, singularise ce manuel dans la tradition des artes, même si nous ne pouvons exclure que d’autres traités grammaticaux du même type n’aient pas été accompagnés d’une traduction grecque que nous n’aurions pas conservée. Quoi qu’il en soit, le statut de cette traduction est assez difficile à établir. Essentiellement deux questions se posent à son sujet : quel est son auteur, est-ce Dosithée lui-même ou un utilisateur plus tardif (éventuellement dans le monde occidental), et à quoi sert-elle ? Il apparaît clairement que le grec doit aider à la compréhension du latin, non le remplacer. La traduction grecque n’a donc pas une vocation à l’autonomie. Elle n’a de sens qu’en relation avec le latin. La traduction semble se réduire au fur et à mesure que l’on avance dans la grammaire. Il semble que Dosithée attende de l’utilisateur de la grammaire qu’il ait de moins en moins besoin d’aide à mesure qu’il progresse dans l’apprentissage. J’analyse la nature du grec de Dosithée en vue de mieux comprendre la méthode d’apprentissage mise en œuvre dans ce manuel. Bibliographie Bonnet G., Dosithée. Grammaire latine, Paris, CUF, 2005. --, La version grecque de l’Ars de Dosithée, dans L. Basset-Fr. Biville-B. Colombat-P. Swiggers-A. Wouters (éds), Bilinguisme et terminologie grammaticale gréco-latine, Leuven-Paris-Dudley, 2007, p. 191-199. Dickey E., The Authorship of the Greek Version of Dositheus’ Grammar and What it Tells Us about the Grammar’s Original Use, dans R. Ferri-A. Zago (eds), The Latin of the Grammarians. Reflections about Language in the Roman World, Turnhout, 2016, p. 205-235. --, Learning Latin. The Ancient Way. Latin Textbooks from the Ancient World, Cambridge, 2016. Lenoble M. – Swiggers P. – Wouters P., L’enseignement grammatical entre grec et latin : le manuel de Dosithée, P. Desmet-L. Jooken-P. Schmitter-P. Swiggers (eds), The History of Linguistic and Grammatical Praxis. Proceedings of the XIth International Colloquium of the Studienkreis « Geschichte der Sprachwissenschaft » (Leuven, 2nd – 4th July, 1998), Leuven-Paris-Sterling, 2000, p. 3-22. Reichamnn V., Römische Literatur in griechischer Übersetzung, Leipzig, 1943. J. Tolkiehn J., Dosithei Ars Grammatica, Leipzig, 1913. [less ▲]

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See detailHow to count leaves in the trees from Tetris?
Vandomme, Elise ULg

Conference (2017, May 13)

In the world derived from the game Tetris, what is a tree? How many leaves can such a tree can have? What happens if instead, we consider the world derived from the game Minecraft? Can we generalise this ... [more ▼]

In the world derived from the game Tetris, what is a tree? How many leaves can such a tree can have? What happens if instead, we consider the world derived from the game Minecraft? Can we generalise this problem in other worlds? Does there exist an efficient algorithm to determine the maximal number of leaves a tree can have? These are the questions we will answer in this talk, using the point of view of graph theory. To determine the complexity of the problem, we will use some dynamical programming. [less ▲]

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See detailA New Perspective on Mary of Hungary’s Labours of Hercules Tapestries (Patrimonio Nacional, series 23)
Laruelle, Anne-Sophie ULg

Conference (2017, May 13)

This lecture aims to shed new light on the twelve-piece set purchased in 1535 by the governess of the Netherlands, Mary of Hungary, from the Dermoyen workshop in Brussels. It focuses on four main themes ... [more ▼]

This lecture aims to shed new light on the twelve-piece set purchased in 1535 by the governess of the Netherlands, Mary of Hungary, from the Dermoyen workshop in Brussels. It focuses on four main themes: the existing pieces and their iconography, the manufacture that woven them, the artists who provided the models to the weavers and finally the patron who chose the subject and gave these tapestries a precise function in her interior. [less ▲]

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See detailLa maladie du Renard Wallon!
DETRY, Olivier ULg

Conference (2017, May 13)

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See detailAux frontières du réel : de l’immersion aux formes de jeu « secondaire »
Delbouille, Julie ULg; Hurel, Pierre-Yves ULg; Barnabé, Fanny ULg et al

Conference (2017, May 12)

Dans les sciences du jeu, la problématique du franchissement de la frontière qui nous sépare des mondes virtuels se cristallise particulièrement à travers le concept d’immersion. S’il est constamment ... [more ▼]

Dans les sciences du jeu, la problématique du franchissement de la frontière qui nous sépare des mondes virtuels se cristallise particulièrement à travers le concept d’immersion. S’il est constamment employé pour étudier le rapport que le joueur entretient avec le jeu, il reste cependant peu problématisé ; plus encore, son omniprésence et l’hétérogénéité (parfois contradictoire) de ses définitions empêche de penser l’acte de joueur en dehors du prisme de ce paradigme. Cette communication vise, d’une part, à souligner les limites et les écueils de l’emploi de ce concept au sein des game studies et, d’autre part, à mettre en lumière des pratiques que l’immersion a, jusqu’à présent, contribué à reléguer au second plan de la recherche. [less ▲]

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See detailNGS for NBS : Are we ready for « Next Generation » Newborn Screening ?
BOEMER, François ULg

Conference (2017, May 12)

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See detailTime perspective and emotional future-oriented thoughts
Barsics, Catherine ULg

Conference (2017, May 12)

Time perspective —the tendency to focus on the past, present, and/or future— has a pervasive influence on many aspects of human cognition and behaviour, such as decision making, planning, motivation, self ... [more ▼]

Time perspective —the tendency to focus on the past, present, and/or future— has a pervasive influence on many aspects of human cognition and behaviour, such as decision making, planning, motivation, self-regulation, and sense of identity. Over the last decade, important progress has been made in understanding the representations and processes that support our ability to mentally explore possible futures. More particularly, many thoughts and mental images that people form about their personal future refer to emotionally significant events. Such emotional future-oriented thoughts (EmoFTs) were studied in natural settings and under laboratory conditions. The results showed that EmoFTs are frequent, occur in various contexts, and are perceived to fulfill important functions, mostly related to goal pursuit and emotion regulation. The phenomenological characteristics of EmoFTs (e.g., representational format) vary according to valence. When distinguishing between anticipatory and anticipated emotions (i.e., emotions experienced in the present versus emotions expected to occur in the future), a positivity bias in the frequency of EmoFTs is found to be restricted to anticipated emotions. These findings shed further light on the properties of future oriented-thoughts, and emphasize the importance of their affective components. [less ▲]

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See detailBasic Helix loop Helix transcription factor twist1a and twist1b and their involvement in the skeletal development of zebrafish
Zappia, Jérémie ULg

Conference (2017, May 12)

1. Objective The twist1a and twist1b genes code for transcription factors involved during embryogenesis in the craniofacial development. The human ortholog of twist1a and twist1b, TWIST1 has been shown to ... [more ▼]

1. Objective The twist1a and twist1b genes code for transcription factors involved during embryogenesis in the craniofacial development. The human ortholog of twist1a and twist1b, TWIST1 has been shown to be mutated in cases of the Saethre–Chotzen syndrome (SCS). However, the roles of these genes in skeletal development in zebrafish remain to be clarified. The aim of our research is to characterize the effects of the knock-down of twist1a and twist1b in the zebrafish. 2. Methods Antisens morpholino are used for the knock-down of twist1a and twist1b (respectively MoTwist1a and MoTwist1b). The sox9a expression is investigated using whole amount in situ hybridization. 3. Results We show the spatio-temporal expression pattern of twist1a and twist1b during the first 6 days of zebrafish development and present the effects observed on cartilage and bone formation upon knock-down of these genes in zebrafish larvae. The results reveal a decrease of the cranial cartilage and bone formation in both MoTwist1a and MoTwist1b. Interestingly, when MoTwist1a and MoTwist1b are co-injected, the cranial cartilage formation is strongly reduced, while ectopic cartilage formation appeared in the front of the head. We also show an increase in expression of sox9a, a master regulator of chondrogenesis, in morphants. 4. Summary and Conclusions Even though it was shown that twist1a and twist1b maintain a pool of osteoprogenitor-like cells, we show that a knock-down of these genes induces a decrease of skeletal formation. Our hypothesis is that the morphants run out of progenitor cells to assure correct bone and cartilage formation. In the future, we plan to generate twist1a mutants in order to further characterize the effect of this mutation. The twist1a mutant will eventually serve for a rescue study using human TWIST1 mRNA, wild-type or mutant in order to have a better understanding of the human disorder SCS. [less ▲]

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See detailÀ la recherche d"une réalité "vraie" : entre peur métaphysique et angoisse dans l'autofiction (néo)fantastique hispano-américaine
Licata, Nicolas ULg

Conference (2017, May 12)

Après avoir déterminé les limites que lui concèdent des disciplines comme l’histoire des émotions, la psychanalyse et la philosophie, cette communication se centre sur la peur comme effet de la ... [more ▼]

Après avoir déterminé les limites que lui concèdent des disciplines comme l’histoire des émotions, la psychanalyse et la philosophie, cette communication se centre sur la peur comme effet de la littérature fantastique, et plus concrètement dans le cadre de cette catégorie spécifique de romans que Vincent Colonna a baptisé « autofiction fantastique ». À la lumière de trois de ces fictions fantastiques modernes articulées autour de leurs propres auteurs, nous expliquerons pourquoi, à notre avis, l’effet qu’elles produisent chez le lecteur diffère de la peur. Il ne s’agit pas d’un effet inférieur ni supérieur, mais simplement différent : l’angoisse. [less ▲]

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See detailAn easy route to synthesis black phosphorus at low pressure and soft conditions
Tiouitchi, Ghassane; Hamedoun, Mohammed; El Kenz, Abdallah et al

Conference (2017, May 11)

Black phosphorus a promising candidate for large application, due to his variety of structural and physical properties, can be prepared by a very low-coast reaction route with high purity and ... [more ▼]

Black phosphorus a promising candidate for large application, due to his variety of structural and physical properties, can be prepared by a very low-coast reaction route with high purity and crystallinity. Black phosphorus is prepared from red phosphorus at 873K under reduced pressure using a simple and low cost catalytic system. The quality of crystal with lattice parameters a=3.31Å, b=10.48Å, c=4.37Å can be approved by a series of characterizations like scanning microscopy electron (SEM), energy dispersive spectrometry (EDX), Raman spectroscopy and powder X-rays. The new preparation method of black phosphorus represents an easy, effective and low cost approach to avoid complicated preparative setups, toxic catalysts, or “dirty” flux methods and is of general interest in elemental chemistry. [less ▲]

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See detailWelcome & Overview ChemEng Liège
Pfennig, Andreas ULg

Conference (2017, May 11)

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See detailAtelier ENMG
WANG, François-Charles ULg

Conference (2017, May 11)

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See detailCerebral correlates underlying the impact of circadian and sleep homeostatic processes on cognition
Schmidt, Christina ULg; Reichert, Carolin; Maire, Micheline et al

Conference (2017, May 11)

Detailed reference viewed: 9 (2 ULg)
See detailL'évaluation des acquis de formation
Poumay, Marianne ULg

Conference (2017, May 11)

Cette conférence pose comme complémentaires l'évaluation d'une part des "ressources" (savoirs, savoir-faire et attitudes), d'autre part des compétences (mobilisation et combinaison de ces ressources dans ... [more ▼]

Cette conférence pose comme complémentaires l'évaluation d'une part des "ressources" (savoirs, savoir-faire et attitudes), d'autre part des compétences (mobilisation et combinaison de ces ressources dans des savoir-agir en contexte authentique). Elle présente des modèles et illustrations qui permettent de maximiser l'impact de l'évaluation sur le développement de l'étudiant, en plaçant un accent tout particulier sur la qualité du feedback et les formes de questionnement. [less ▲]

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Peer Reviewed
See detailLa montée d'une agriculture urbaine en Belgique: nourrir les populations en investissant deux grandes villes: Bruxelles-Capitale et Liège
Bousbaine, Antonia ULg

Conference (2017, May 11)

The loss of farms is problematic in Belgium, particularly in Wallonia (68% loss between 1980 and 2015) and in the Brussels-Capital Region and access to land is a real challenge for farmers to deal when ... [more ▼]

The loss of farms is problematic in Belgium, particularly in Wallonia (68% loss between 1980 and 2015) and in the Brussels-Capital Region and access to land is a real challenge for farmers to deal when setting up their farms. Recently, however, there has been a real increase in awareness of the importance of agricultural activity and land on the part of public authorities and especially of citizens who are trying to regain control of their food. These citizens are looking for a healthier and safer food in the face of the shortage of agricultural land in a densely populated country. The smallest interstices of the cities are occupied to set up innovative agricultural projects such as in Brussels and Liège where vegetable gardens and a Food Land Belt is developing to feed the populations of the cities. These agri-urban projects are the work of the citizens themselves, who take the initiative themselves to realize these innovative actions by pooling their knowledge and tools centered on new agricultural production models. We highlight the actions taken by certain segments of the population in the cities of Brussels and Liège where food, social and environmental issues have become a concern for consumers who invest in the green spaces left vacant compared to what is being done in other countries such as Canada or France, for more than a decade. [less ▲]

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See detailLes lieux hybrides dans la ville : essai de cartographie
Uyttebrouck, Constance ULg

Conference (2017, May 11)

Les « lieux hybrides », associant activités résidentielles et professionnelles dans un même espace, et dont le développement s’inscrit dans l’évolution de l’habitat et du monde du travail, nécessitent la ... [more ▼]

Les « lieux hybrides », associant activités résidentielles et professionnelles dans un même espace, et dont le développement s’inscrit dans l’évolution de l’habitat et du monde du travail, nécessitent la mise en place de dispositifs régulateurs, au regard des dynamiques de cohésion sociale et de développement urbain. Une production non régulée de tels lieux comporte des incertitudes liées à la mobilité, qui pourraient entraîner un nouveau mouvement d’urbanisation vers la périphérie. La mixité de fonctions qui les caractérise pourrait en outre fragiliser l’accès au logement dans des quartiers soumis à une forte pression immobilière. L’article met en évidence la possibilité de cartographier le parc actuel de lieux hybrides à l’échelle de la région bruxelloise, voire de la métropole, pour visualiser les dynamiques spatiales en jeux. L’objectif est ensuite de mener une étude comparative avec Amsterdam et Stockholm, afin de dégager les facteurs de convergence et de divergence liés à des dynamiques urbaines propres ou à des instruments de régulation spécifiques. Le caractère innovant, et parfois informel, du phénomène complexifie également l’établissement de la cartographie. [less ▲]

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See detailDownstream Design for Biobased Processes
Pfennig, Andreas ULg

Conference (2017, May 11)

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See detailL'APL en région wallonne. Référence et contrôle : méthodologie et résultats
Vandenberghe, Christophe ULg

Conference (2017, May 11)

En région wallonne (Belgique), des contrôles sont chaque année organisés en vue de mesurer l'azote nitrique présent dans les parcelles d'agriculteurs situés en zone vulnérable. Les résultats de ces ... [more ▼]

En région wallonne (Belgique), des contrôles sont chaque année organisés en vue de mesurer l'azote nitrique présent dans les parcelles d'agriculteurs situés en zone vulnérable. Les résultats de ces mesures sont comparés à des références annuelles établies pour huit classes d'occupation de sol.En 2016, les références établies par Gembloux Agro-Bio Tech (ULiège) et l'UCL se sont appuyées sur des observations réalisées dans plus de 250 parcelles distribuées dans 41 exploitations agricoles encadrées en matière de gestion de l'azote. Le Service Public de Wallonie a fait contrôler environ 2000 parcelles par des laboratoires agréés. De l'ordre de 80% des exploitations contrôlées ont présenté des résultats conformes. [less ▲]

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See detailLivre de raison, livre de famille. Réflexions méthodologiques sur la diffusion extralittéraire de Gerard du Frattre
Lambert, Adélaïde ULg

Conference (2017, May 10)

Cette communication consistera à présenter le codex Paris, BnF, fr. 12791, un manuscrit personnel entièrement copié par Jacques Le Gros, un marchand de soie parisien, mort en 1551. Outre le récit épique ... [more ▼]

Cette communication consistera à présenter le codex Paris, BnF, fr. 12791, un manuscrit personnel entièrement copié par Jacques Le Gros, un marchand de soie parisien, mort en 1551. Outre le récit épique Gerard du Frattre, le codex contient des pièces portant sur l’actualité sociale et politique du 2e quart du XVIe siècle. À l’aide des travaux portant sur les livres de raison français et sur les livres de famille italiens, il s’agira d’interroger la manière dont ce recueil organique peut être appréhendé et, plus largement, de proposer quelques perspectives de recherche sur la réception des œuvres littéraires françaises dans la sphère de la bourgeoisie marchande. [less ▲]

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See detailHunger Art and the Sensorium
Delville, Michel ULg

Conference (2017, May 10)

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See detailEnergy product and magnetic properties of strontium hexagonal ferrite: experimental and theoretical investigation
Abraime, Brahim; Ait Tamerd, Mohamed; Mahmoud, Abdelfattah ULg et al

Conference (2017, May 10)

The interest toward hard magnetic materials increases in the last years. In order to have the best magnetic properties of these materials, researchers count on the efficiency of different synthesis ... [more ▼]

The interest toward hard magnetic materials increases in the last years. In order to have the best magnetic properties of these materials, researchers count on the efficiency of different synthesis methods. In permanent magnets application, ferrite materials possess a good place among the other magnet families. In permanent magnets field, the more important parameter that describes the magnetic strength of a magnet is the maximum energy product (BH)max. A strong permanent magnet has an important value of (BH)max. In this work, we will study the effect of annealing temperature on maximum energy product and other magnetic properties of Strontium hexaferrite SrFe12O19 synthesized using sol-gel autocombustion method, with different annealing temperatures, characterized using Thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM), Mössbauer spectroscopy (MS) and superconducting quantum interference device magnetometer (SQUID). Ab initio calculation for magnetic properties is also performed in order to compare it with low temperature experimental results. [less ▲]

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See detailPasser à un SGB pour susciter l'appétit de changement et lutter contre l'inertie ?
Renaville, François ULg

Conference (2017, May 10)

En février 2015, les Bibliothèques de l'Université de Liège sont passées au système de gestion de bibliothèque Alma, moins de 10 ans après une migration vers Aleph et 2 ans après le lancement de la ... [more ▼]

En février 2015, les Bibliothèques de l'Université de Liège sont passées au système de gestion de bibliothèque Alma, moins de 10 ans après une migration vers Aleph et 2 ans après le lancement de la solution discovery Primo. Cette présentation balaye les moments clés du projet Alma, en mettant l'accent sur la composante organisationnelle, la gestion du changement, les attentes et espoirs suscités. [less ▲]

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See detailComprehensive Ion Mobility Calibration Strategies based on Synthetic Polymers
Haler, Jean ULg; Kune, Christopher ULg; Chirot, Fabien et al

Conference (2017, May 09)

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See detailPlant oxylipins: structure-function relationship
Genva, Manon ULg; Andersson, Mats X.; Nasir, Mehmet Nail ULg et al

Conference (2017, May 09)

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See detailFirst retrievals of methane isotopologues from FTIR ground-based observations in the High Arctic
Bader, Whitney ULg; Strong, Kimberley; Walker, Kaley et al

Conference (2017, May 08)

Atmospheric methane concentrations have reached a new high at 1845 ± 2 ppb, accounting for an increase of 256 % since pre-industrial times (WMO, 2016). In the last ten years, methane has been on the rise ... [more ▼]

Atmospheric methane concentrations have reached a new high at 1845 ± 2 ppb, accounting for an increase of 256 % since pre-industrial times (WMO, 2016). In the last ten years, methane has been on the rise again at rates of ~0.3%/year (e.g., Bader et al., 2016), after a period of stabilization of about 5 years. This recent increase is not fully understood due to remaining uncertainties in the methane budget, influenced by numerous anthropogenic and natural emission sources. In order to examine the cause(s) of this increase, we focus on the two main methane isotopologues, i.e. CH3D and 13CH4. Both isotopologues are emitted in the atmosphere with a different ratio depending on the emission processes involved. As heavier isotopologues will react more slowly than 12CH4, each isotopologue will be depleted from the atmosphere at a specific rate depending on the removal process. Methane isotopologues are therefore good tracers of the methane budget. In this contribution, the first development and optimization of the retrieval strategy of CH3D as well as the preliminary tests for 13CH4 will be presented and discussed, using FTIR (Fourier Transform infrared) solar spectra collected at the Polar Environment Atmospheric Research Laboratory, located at Eureka, Nunavut (80.05 °N, -86.42 °E, 610 m a.s.l.). Mixing ratio vertical profiles from a Whole Atmosphere Community Climate Model (WACCM v.4, Marsh et al., 2013) simulation developed by Buzan et al. (2016) are used as a priori inputs. The uncertainties affecting the retrieved columns, as well as an evaluation of the information content, will be discussed in order to assess the best strategy to be employed based on the altitude sensitivity range and complete error budget. [less ▲]

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See detailDerjaguin-Broekhoff-de Boer analysis of adsorption in very disordered mesopores using probabilistic models
Gommes, Cédric ULg

Conference (2017, May 08)

Our current ability to produce mesoporous materials with ordered morphology has raised fascinating questions about the impact of geometrical disorder on adsorption and desorption states [1]. Many recent ... [more ▼]

Our current ability to produce mesoporous materials with ordered morphology has raised fascinating questions about the impact of geometrical disorder on adsorption and desorption states [1]. Many recent works have investigated the role of mild elements of disorder, such as local constriction or corrugation superimposed to otherwise geometrically ideal cylindrical pores [2,3]. These works have notably shown that elements of disorder may act as nucleation sites and destabilize vapor-like metastable states. The relevance of these perturbation-like results to fundamentally disordered materials, such as gels, is unclear. In particular, do vapor-like metastable states exist at all in this type of very disordered material? In the present communication, we address this question using probabilistic models to investigate the role of disorder. We generalize the classical Gaussian field models of porous materials [4] and use them to analyze adsorption and desorption in the Derjaguin-Broekhof-de Boer approximation. Our approach differs from earlier contributions in that both the adsorbent and the adsorbate are described in terms of probabilities [5]. This enables us to analyze the adsorbate configuration in very disordered solids using a low-dimensional yet realistic configuration space. We notably show that vapor-like metastable states are unlikely in gel-like disordered materials. [less ▲]

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See detailSpray Drying-­Assisted Synthesis of Na2FePO4F/CB and Na2FePO4F/CNT Composite Cathodes for Lithium Ion Battery
Mahmoud, Abdelfattah ULg; Brisbois; Caes, sebastien et al

Conference (2017, May 08)

Fluorophosphates are considered among the most interesting series of cathode materials for Li/Na-ion batteries. Na2FePO4F, with layered structure and two-dimensional pathways for facile Na+/Li+ transport ... [more ▼]

Fluorophosphates are considered among the most interesting series of cathode materials for Li/Na-ion batteries. Na2FePO4F, with layered structure and two-dimensional pathways for facile Na+/Li+ transport [1], exhibits minimal structural changes (3.7%) upon reduction/oxidation. The average working voltage is 3.3 V versus Li+/Li. However, one of the key drawbacks of Na2FePO4F electrodes is their low intrinsic electronic conductivity. In this work, we report on the synthesis of Na2FePO4F by spray-drying, a technique which is easily scaled-up from the lab- to the industrial-scale and ensures a good homogeneity of all precursors. We are investigating the replacement of the grinding step by the addition of conductive carbon (carbon black and carbon nanotubes) to the solution containing the inorganic precursors of the Na2FePO4F phase in order to prepare Na2FePO4F/CB and Na2FePO4F/CNT with different ratios of CB and CNT (10 and 20%) and enhanced conductivity. The electrochemical performance shows that the addition of CNT improves remarkably the capacity of the NFPF electrode material thanks to better CNT dispersion inside and at the surface of the NFPF particles which enhances the electronic conductivity. Acknowledgements: The authors thank the Walloon Region for support under the “PE Plan Marshall 2.vert” program (BATWAL -1318146). A. Mahmoud is grateful to the Walloon region for a Beware Fellowship Academia 2015-1, RESIBAT n° 1510399. References [1] M. Brisbois, S. Caes, M-T. Sougrati, B. Vertruyen, A. Schrijnemakers, R. Cloots, N. Eshraghi, R-P. Hermann, A. Mahmoud, F. Boschini, Solar Energy Materials & Solar Cells 148 (2015) 11-19. [less ▲]

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See detailObjets directs en kirundi
Tuyubahe, Pascal ULg

Conference (2017, May 05)

Detailed reference viewed: 13 (3 ULg)
See detailFunctional emulsion-templated macroporous polymers via controlled radical polymerization
Mathieu, Kevin ULg; Jérôme, Christine ULg; Debuigne, Antoine ULg

Conference (2017, May 05)

Macroporous polymer monoliths with interconnected structures have attracted considerable interest in the fields of supported catalysis, chromatography, water purification, etc. A popular and ... [more ▼]

Macroporous polymer monoliths with interconnected structures have attracted considerable interest in the fields of supported catalysis, chromatography, water purification, etc. A popular and straightforward synthesis approach for such open-cell polymers is based on the emulsion-templated polymerization. In this strategy, a major phase is dispersed in a minor continuous phase containing monomers, cross-linker, initiator and surfactant. The curing of the continuous phase followed by the removal of the dispersed phase leads to a monolith with voids interconnected by pores. Size and number of the latters are influenced by several parameters and especially by the nature of the surfactant. Consequently, we prepared by controlled radical polymerization a series of well-defined amphiphilic copolymers having different hydrophilic-lipophilic balance (HLB) and chain-ends, used it as stabilizers for the emulsion-templated polymerizations and demonstrated the crucial effect of the macromolecular features as well as the concentration on the foam morphology. Secondly, the physical and the chemical anchoring of the macromolecular surfactants at the surface of the pores were also considered for tuning the surface properties of the porous monoliths in one step. This strategy was also implemented with alkyne-terminated copolymers in order to decorate the surface of the cavities with “clickable” moieties which broadens the scope of functional macroporous polymers. [less ▲]

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See detailTo be plastic is fantastic: delineate coral species niches for assessing their tolerance to changes
Denis, Vianney; Sturaro, Nicolas ULg; Yang, Shan-Hua et al

Conference (2017, May 05)

Climatic and anthropogenic disturbances alter coral reefs by reconfiguring existing coral assemblages. Surviving species are selected by the new environment based on particular traits that they may ... [more ▼]

Climatic and anthropogenic disturbances alter coral reefs by reconfiguring existing coral assemblages. Surviving species are selected by the new environment based on particular traits that they may exhibit, with the plasticity in traits defining ecological strategies associated with contrasting degrees of tolerance to changes. In this process, specialists are expected to tolerate few changes to the environmental conditions and are restricted to specific habitat, while generalists can cope with a wider range of environmental conditions by readjusting traits according to the habitat’s features. Ecological strategies in corals have been exclusively defined according to species’ trait averages, irrespective of individual variations. Challenges representing the acquisition and use of energy have also tended to be oversimplified, specifically by the choice of easy traits in the absence of strong scientific evidence. In this study, we propose a re-examination of strategies in scleractinian corals by focusing on the intraspecific variation of traits. We will investigate how the characteristics of a given species niche can help coral species to tolerate changes. Our multidisciplinary approach will focus on three major characteristics of the coral holobiont (its physiology, trophic ecology, and associated microbiome) which together can define the ecological plasticity of species. This work is of tremendous importance for enhancing the understanding of coral response to environmental changes and for ensuring functions as well as the services of this ecosystem to future generations. [less ▲]

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See detailHow microbes network (and are networked) in geological disposal research: a sociological perspective
Van Oudheusden, Michiel ULg; Schröder, Jantine; Turcanu, Catrinel

Conference (2017, May 05)

In MIND subtask 3.2, we ascertain whether and how microbes, microbiologists, and microbiology are enrolled into research on the geological disposal of radioactive waste. We adopt a social studies of ... [more ▼]

In MIND subtask 3.2, we ascertain whether and how microbes, microbiologists, and microbiology are enrolled into research on the geological disposal of radioactive waste. We adopt a social studies of science (actor-network theory) perspective that observes how actors within MIND (e.g. MIND researchers, members of the MIND Implementer Review Board) and outside the project (e.g. geologists, waste management regulators, policy makers) process data and generate insights on the role of microbes in waste disposal, and how these processes elicit challenges and opportunities for enrolment. Examples of the latter include mixed appreciations of the impact of microbial activity on artificial barriers (e.g. negligible vs. substantial), the scope for, and appeal of, institutional uptake of microbiology research (e.g. through the coupling of microbiology research to “the safety case”), and the (re)drawing of disciplinary boundaries (e.g. between microbiology and geology). Drawing on these and related examples, we explore how through projects like MIND, microbes network, and are networked, differently for the joint purpose of radioactive waste disposal. [less ▲]

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See detailActivational and organizational disruption of folliculogenesis and estrous cycle caused by exposure to Bisphenol A (BPA) during early postnatal or adult life
Lopez Rodriguez, David ULg; Franssen, Delphine ULg; GERARD, Arlette ULg et al

Conference (2017, May 05)

Our previous studies have shown that an early postnatal exposure to a very low dose of bisphenol A (BPA) disrupts sexual maturation and pubertal timing. However, the long-term effects of such low dose ... [more ▼]

Our previous studies have shown that an early postnatal exposure to a very low dose of bisphenol A (BPA) disrupts sexual maturation and pubertal timing. However, the long-term effects of such low dose exposure as well as the effects of adult exposure have not been studied. One day-old and 90 day-old female rats received daily subcutaneous injections of corn oil (vehicle) or BPA (25ng/kg/d or 5mg/kg/d) for 15 days. The early postnatal exposure to both BPA doses significantly decreased the percentage of females with a regular cycle (BPA-25ng: 51±15%; BPA-5mg: 7±7%; OIL: 86±2%). The estrus cycle alterations were characterized by a decrease in time spent in proestrus (BPA-25ng: 13±3%; BPA-5mg: 12±3%; OIL: 18±3%). During adult exposure, both doses caused a disruption of the estrous cycle characterized by a significant decrease in the average time spent in proestrus (BPA-25ng: 19±2%; BPA-5mg: 17±1%; OIL: 23±1%). This effect was transient as the exposed females showed a regular cycle one month after the last dose of BPA. After adult exposure, we also observed a disruption of folliculogenesis characterized by a significant decrease of antral follicles (BPA-25ng: 21±2%; BPA-5mg: 21±2%; OIL: 36±2%) and increase of atretic follicles (BPA-25ng: 24±4%; BPA-5mg: 26±6%; OIL: 15±1%). GnRH secretion measured ex vivo 24h after adult exposure was moderately affected by BPA. Indeed, GnRH interpulse interval was significantly different when comparing animals exposed to the high or low dose of BPA but not when comparingexposed animals to the control group (BPA-25ng: 42.6±0.5; BPA-5mg: 40.2±0.6%; OIL: 41.1±0,2minutes±SEM). In conclusion, while exposure to BPA produces persistent alterations of the estrous cycle after early postnatal exposure, exposure during adulthood appears to cause activational non-persistent alternations of both the estrous cycle and folliculogenesis. [less ▲]

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See detailThe use of stable isotopes in marine animal trophic ecology
Sturaro, Nicolas ULg; Lepoint, Gilles ULg; Frederich, Bruno ULg et al

Conference (2017, May 05)

Stable isotope analysis has been recognised as a useful tool for studying animal diet, identifying trophic relationships, and delineating food web structures as well as their alteration by human ... [more ▼]

Stable isotope analysis has been recognised as a useful tool for studying animal diet, identifying trophic relationships, and delineating food web structures as well as their alteration by human activities. Over the past decade, the number of studies using stable isotopes of carbon and nitrogen in marine trophic ecology has increased rapidly as technological advancements greatly facilitate their use. This tool is now among the most popular in ecology and several fields of investigations have developed, including the extension of analyses to more ‘difficult’ stable isotope ratio measurements such as sulfur, the use of isotope mixing models, and the creation of compound-specific stable isotope analysis. Here, we present three case studies taken from our own investigations and previously published literature. The first investigates seagrass detritus ecosystem in which the coexistence of a rich number of species of crustacean raises the question of whether trophic diversity exist among these species. The second examines the feeding habits of coral reef fish and explores whether habitat choice on the reef and their behaviour emerges as good predictors of diet. The third presents the potential use of stable isotope analysis in studying the nutrition of scleractinian corals, which are complex symbiotic organisms that usually present both autotrophic and heterotrophic pathways. This tool has enhanced our understanding of coral species biology, yet it remains underused. Overall, we aim to provide initial insights into stable isotope analysis for illustrating their utility and potential applications to better understand food web structures and species diet in the waters around Taiwan. [less ▲]

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See detailStaaten mit ausgeprägter Regionalautonomie - Fallstudie : Belgien
Behrendt, Christian ULg

Conference (2017, May 05)

Exposé donné à l'invitation du Congrès des pouvoirs locaux et régionaux du Conseil de l'Europe, dans le cadre de la conférence "Pour une réforme territoriale réussie : Causes et méthodes de réformes infra ... [more ▼]

Exposé donné à l'invitation du Congrès des pouvoirs locaux et régionaux du Conseil de l'Europe, dans le cadre de la conférence "Pour une réforme territoriale réussie : Causes et méthodes de réformes infra-nationales dans les pays membres du Conseil de l'Europe", Eupen, Belgique, 5 mai 2017. [less ▲]

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See detailControlled synthesis of α-olefins-based copolymers by organocobalt(III) complexes
Demarteau, Jérémy ULg; Debuigne, Antoine ULg; Detrembleur, Christophe ULg

Conference (2017, May 04)

Polyolefins, and ethylene-vinyl acetate (EVA) copolymers in particular, are highly attractive materials that are industrially synthesized by a free radical process for large range of applications from ... [more ▼]

Polyolefins, and ethylene-vinyl acetate (EVA) copolymers in particular, are highly attractive materials that are industrially synthesized by a free radical process for large range of applications from food packaging to coatings. Their production requires drastic synthesis conditions (high pressure and high temperature) and the resulting polymers are generally ill-defined. Controlling the polymerization of these unconjugated monomers remains however extremely difficult because of the lack of stabilizing group on their double bond. Moreover, the preparation of chain-end functionalized polyolefins is actually impossible under these conditions. This communication aims at reporting an efficient platform for the precision design of alpha-olefin-based copolymers through a controlled radical polymerization technique called Cobalt-Mediated Radical Polymerization (CMRP). The latter is based on the reversible deactivation of the radical chains by a cobalt complex bearing acetylacetonate (acac) ligands, which is very efficient under mild experimental conditions. The presentation will focus on three main axes: (i) the synthesis of a novel organocobalt(III) complex useful for the functionalization of the polymer chains, (ii) the preparation of various EVA architectures, (iii) the controlled copolymerization of vinyl acetate with a perfluorinated alkene, i.e. perfluorohexylethylene. The hydrolysis of the pendent esters moieties of these fluorinated copolymers paved the way to their polyvinylalcohol counterparts with a marked amphiphilicity. [less ▲]

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See detailVrai, faux, non-fictif : l’essai comme saisie des mondes contemporains
Claisse, Frédéric ULg

Conference (2017, May 04)

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See detailUnusually high sea ice cover influences resource use by benthic invertebrates in coastal Antarctica
Michel, Loïc ULg; Dubois, Philippe; Eleaume, Marc et al

Conference (2017, May 04)

Antarctica currently undergoes strong and contrasted impacts linked with climate change. While the West Antarctic Peninsula is one of the most rapidly warming regions in the world, resulting in sea ice ... [more ▼]

Antarctica currently undergoes strong and contrasted impacts linked with climate change. While the West Antarctic Peninsula is one of the most rapidly warming regions in the world, resulting in sea ice cover decrease, the sea ice cover of East Antarctica unexpectedly tends to increase, possibly in relation with changes in atmospheric circulation. Changes in sea ice cover are likely to influence benthic food web structure through modifications of benthic-pelagic coupling, disruption of benthic production and/or modifications of benthic community structure (i.e. resource availability for benthic consumers). Here, we studied shallow (0-20 m) benthic food web structure on the coasts of Petrels Island (Adélie Land, East Antarctica) during an event of unusually high spatial and temporal (two successive austral summers without seasonal break-up) sea ice cover. Using stable isotope ratios of C and N and the SIAR mixing model, we examined importance of 4 organic matter sources (benthic macroalgae, benthic biofilm, sympagic algae, suspended particulate organic matter) for nutrition of dominant primary consumers and omnivores. 14 invertebrate taxa including sessile and mobile polychaetes, gastropods, bivalves, sea stars, sea urchins and sea cucumbers were studied. Our results indicate that most benthic invertebrates predominantly relied on sympagic algae. Despite its very high abundance, trophic role of benthic biofilm seemed limited. However, interpretation of data was complicated by the peculiar ecophysiological features of Antarctic invertebrates, whose very low metabolic rates could be associated to low isotopic turnover and long time to reach isotopic equilibrium with their food items. Resource use by consumers from Adélie Land markedly differed from literature data about invertebrate diet in coastal Antarctica, suggesting 1) important influence of increased sea ice cover on benthic food web structure and 2) high spatial and/or temporal variation in the feeding habits of studied organisms, likely linked with a high degree of trophic plasticity. Our results provide insights about how Antarctic benthic consumers, which have evolved in an extremely stable environment, might adapt their feeding habits in response to sudden man-driven changes in environmental conditions and trophic resource availability. [less ▲]

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See detailEnsuring consistency of tools dedicated to biodiversity and ecosystem services : case studies
Pécheur, Emilie ULg; Maebe, Laura ULg; Piqueray, Julien

Conference (2017, May 04)

Public awareness regarding key issues of biodiversity and ecosystem services gave rise to several policies aiming at their consideration in human activities. These policies led to a bunch of legal ... [more ▼]

Public awareness regarding key issues of biodiversity and ecosystem services gave rise to several policies aiming at their consideration in human activities. These policies led to a bunch of legal constraints and incentives that are as many tools to preserve and restore both biodiversity and ecosystem services. However, these tools are often activated in a punctual way, following private initiatives or opportunities and without much reflection about the stakes beyond the actors’ own interests. This results in scattered actions, a lack of cohesion in land planning and sometimes conflicts between stakeholders. Yet biodiversity and ecosystem services need a collaborative management, beyond the individualist approach, to ensure the success and continuity of launched projects. Two case studies illustrate the collaborative and structured application of diverse tools by and for a variety of stakeholders willing to respond to specific needs. The first case is biodiversity-oriented, as it concerns the conservation of Bromus grossus, a plant species listed in Annex II of the Natura 2000 “Habitat” directive, which only grows in agroecosystems. The second case study worked on land multi-functionality in three Walloon municipalities, using ecosystem services as a tool for a land consolidation plan. These two examples highlight: 1° the key actors for the launching and cohesion of the projects, 2° the strengthening steps for short and mid-term success and 3° some conflicting elements interfering with coherent development plans. [less ▲]

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See detailOPTIBRI Opening and Project Overview
Habraken, Anne ULg; Duchene, Laurent ULg; Bouffioux, Chantal ULg et al

Conference (2017, May 03)

presentation of genesis of the project, his goal and objectives, the partnership, the task flowchart and main achievements

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See detailMontenegrin ponds and lakes under threat: multiple stressors caused large-scale amphibian decline
Denoël, Mathieu ULg; Kalezić, Miloš; Džukić, Georg et al

Conference (2017, May 03)

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See detailPenser l’anticipation par le discours social. Variations sur le radium
Stienon, Valérie ULg

Conference (2017, May 03)

Une véritable fureur du radium s’empare du premier tiers du XXe siècle, sur une période allant de la découverte des rayons X par Röntgen en 1895, de la radioactivité par Becquerel en 1896 puis du radium ... [more ▼]

Une véritable fureur du radium s’empare du premier tiers du XXe siècle, sur une période allant de la découverte des rayons X par Röntgen en 1895, de la radioactivité par Becquerel en 1896 puis du radium par le couple Curie en 1898, jusqu’à la mort de Marie Curie en 1934. Le radium constitue un cas intéressant pour interroger les possibles de la science, l’extension de l’imaginaire social par ses applications au quotidien et ses modalités de mise en récit entre réalité, croyance et fiction. À travers un large corpus d'articles de presse (articles scientifiques, romans-feuilletons, publicités, petites annonces, blagues illustrées) et de romans (aventure, fantastique, espionnage), la communication propose une approche contextuelle et médiatique du récit d'anticipation. La réflexion doit permettre de réévaluer des cadres de réception de l'anticipation souvent limités à l’alternative entre prophétisme du texte supposé visionnaire et obsolescence de la thématique non advenue ou passée de mode. [less ▲]

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See detailX-ray tomography : a tool for revealing local distribution of liquid in structured packed columns
Toye, Dominique ULg

Conference (2017, May)

Presentation of the x-ray tomography setup and of the experimental results relative to the fluid distribution and to the flow morphology in a column packed with high performance packing (Mellapak 752Y ... [more ▼]

Presentation of the x-ray tomography setup and of the experimental results relative to the fluid distribution and to the flow morphology in a column packed with high performance packing (Mellapak 752Y). The influence of liquid flowrate and of liquid viscosity is addressed. Results are used to get information required to model the mass-transfer performance in the column. [less ▲]

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See detailLe Service de l’Évaluation Spéciale de la coopération belge au développement : un acteur singulier – retours de terrain.
Contor, Justine ULg

Conference (2017, May)

Cette communication propose de revenir sur nos résultats de terrain s’intéressant à l’évolution d’un acteur singulier de la politique de coopération belge au développement : le Service de l’Évaluation ... [more ▼]

Cette communication propose de revenir sur nos résultats de terrain s’intéressant à l’évolution d’un acteur singulier de la politique de coopération belge au développement : le Service de l’Évaluation Spéciale (SES). Il s’agit d’un service d’évaluation de la politique fédérale de coopération belge au développement, créé à la suite d’une crise politique majeure à la fin des année 1990 en Belgique. À sa création en 2003, le SES est chargé d’évaluer toutes les activités relatives aux politiques de coopération au développement, et de rendre compte au Parlement fédéral belge à propos des conclusions et recommandations issues des évaluations. Mais, le Service a rencontré de nombreuses difficultés opérationnelles, budgétaires, internes et externes, voyant sa légitimité remise en cause. En 2013, l’ancien chef de service voit la fin de son mandat arriver et avec elle la fin (presque) certaine du SES. En 2014, une nouvelle alliance politique est au pouvoir en Belgique et un nouveau ministre est en charge de la coopération au développement. Il entreprend une réforme et le SES se voit attribuer de nouvelles compétences, davantage stratégiques. Il est désormais chargé, en plus de ces missions passées, de conseiller l’administration et le ministre ; de certifier, d’évaluer et d’harmoniser les systèmes de suivi et d’évaluation de l’ensemble des acteurs de la coopération belge. Un nouveau chef de service a été nommé et le SES doit faire face à de nouveaux défis : méthodologique, thématiques, opérationnels, en termes de vision, ou encore en ce qui concerne sa communication interne et externe. [less ▲]

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See detailProcess intensification of the synthesis of glycerol carbonate under microwave irradiation or continuous-flow conditions
Estager, Julien; Pleck, Julie; Gerardy, Romaric ULg et al

Conference (2017, May)

Despite low crude oil prices and the increasing access to shale gas, the establishment of a biobased economy remains a worldwide priority. An integrated biobased economy would not only consider renewable ... [more ▼]

Despite low crude oil prices and the increasing access to shale gas, the establishment of a biobased economy remains a worldwide priority. An integrated biobased economy would not only consider renewable biobased resources to provide industrially relevant chemicals, but would also redefine chemical processing by using greener, safer and more selective process technologies. The last few decades have witnessed the emergence of promising alternative energy sources such as microwave irradiation and alternative process technology such as continuous-flow reactors. Even if biobased chemicals are still marginal on the marklet compared to petrochemicals, many biorefineries are now able to convert biomass into biobased chemical building blocks of good purity on large scales. Amongst these products, glycerol – a side product of the biodiesel industry – is a particularly appealing chemical platform thanks to its high functionality and its wide availability. Various high-value added chemicals can be obtained from glycerol, among which glycerol carbonate retained our attention. Glycerol carbonate is an attractive glycerol derivative that can be used in many applications ranging from low-VOC solvent to polymer synthesis. Many publications describe its synthesis using different catalysts or alternative activation methods such as microwave. Our research effort in process intensification for the industrial valorization of biomass led us to develop an intensified carbonation process of glycerol under microwave irradiation, affording an unprecedented reactivity with short reaction times and high selectivity towards glycerol carbonate. Based on this preliminary study, and using the microwave-to-flow paradigm, continuous-flow processes using mesofluidic reactors have been developed to obtain glycerol carbonate in good yield and high purity. [less ▲]

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See detailIdentifying novel biomarkers for the rapid diagnosis of invasive aspergillosis using GC×GC-TOFMS
Stefanuto, Pierre-Hugues ULg; Rees, Christiaan A.; Beattie, Sarah R. et al

Conference (2017, May)

Aspergillus fumigatus is a filamentous fungus responsible for the life-threatening infection, invasive aspergillosis (IA), in immunocompromised individuals. Currently, IA diagnostic methods take days to ... [more ▼]

Aspergillus fumigatus is a filamentous fungus responsible for the life-threatening infection, invasive aspergillosis (IA), in immunocompromised individuals. Currently, IA diagnostic methods take days to produce a result and methods to obtain samples are invasive. One approach to improve the time-to-diagnosis is based on utilizing our knowledge of fungal metabolism during pathogenesis. Recent studies have demonstrated the importance of oxygen availability during IA, which presents a potential diagnostic opportunity. In this study, we analyzed the early (1 hr) and late (8 hr) volatile profile of A. fumigatus strain CEA1o under oxygen replete (~20% O2) and deplete (0.2% O2) conditions. In order to comprehensively screen the headspace of these cultures, we applied headspace solid phase microextraction (HS-SPME) associated with comprehensive two-dimensional gas chromatography coupled to time of flight mass spectrometry (GC×GC-TOFMS). Comparing the headspace of the four culture conditions, we were able to identify specific volatile biomarkers of low oxygen fungal growth: ethanol, acetaldehyde, 2-propanol, 2,3-butanedione, and 3-hydroxy-2-butanone. Based on the putative identifications of these compounds, we identified potential metabolic pathways that are responsible for their production. The two first compounds are known to be produced during hypoxia metabolism of glucose, however, the three others suggest that previously uncharacterized metabolic pathways may be utilized by A. fumigatus in low oxygen conditions. Validation of these biomarker identities and translation into patients may generate metabolic insight into these organisms during IA pathogenesis. [less ▲]

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See detailChallenges of CO2 capture as an application of fluid separation techniques
Léonard, Grégoire ULg

Conference (2017, May)

The presentation offers a review of CO2 capture technologies presented as an application of fluid separation. CO2 capture processes (Post-combustion, pre-combustion, oxyfuel combustion and industrial ... [more ▼]

The presentation offers a review of CO2 capture technologies presented as an application of fluid separation. CO2 capture processes (Post-combustion, pre-combustion, oxyfuel combustion and industrial processes) and CO2 capture methods (absorption, adsorption, membranes...) are described, and illustrated by industrial examples of these technologies. Techno-economic challenges faced by these technologies are also mentionned, and perspectives for future developments are discussed. [less ▲]

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See detailL'intrapreneuriat, vecteur de nouvelles formes de collaborations ?
Lisein, Olivier ULg

Conference (2017, May)

Intervention sur les enjeux, les challenges et les bénéfices potentiels de l'intrapreneuriat comme vecteur d'innovations et de collaborations pour et au sein des entreprises. Intervention réalisée lors de ... [more ▼]

Intervention sur les enjeux, les challenges et les bénéfices potentiels de l'intrapreneuriat comme vecteur d'innovations et de collaborations pour et au sein des entreprises. Intervention réalisée lors de la table ronde "Interview d’experts: Les nouvelles pratiques de management dans l’entreprise collaborative" dont le fil conducteur est résumé comme suit : "Face à un marché en pleine mutation, nous verrons lors de cette table ronde quelles actions de management les entreprises mettent en place pour valoriser les individus et développer leurs compétences, mais aussi pérenniser une relation empreinte d’autonomie". [less ▲]

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See detailIsomeric species detection of base oil hydrocarbons by photo ionization GC×GC-HRTOF-MS
Giri, Anupam ULg; Courtiade, M; Racaud, A et al

Conference (2017, May)

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See detailPerceived management commitment to safety and safety behaviors: the moderating role of trust and support
Laurent, Julie ULg; Chmiel, Nik; Hansez, Isabelle ULg

Conference (2017, May)

Instrumental processes, based on the idea that individual perceptions of safety climate inform behavior outcomes expectancies (Zohar, 2008), and reciprocation processes, based on social exchange theory ... [more ▼]

Instrumental processes, based on the idea that individual perceptions of safety climate inform behavior outcomes expectancies (Zohar, 2008), and reciprocation processes, based on social exchange theory (Blau, 1964), have been identified as important processes to take into account in order to understand safety behaviors (Chmiel & Hansez, 2016). The main aim of this study is to go further in the explanation of the processes linking perceived management commitment to safety (PMCS) to safety behaviors, by testing the moderating role of two variables reflecting the way workers perceive their supervisor: safety specific trust in the supervisor, illustrating instrumental processes and perceived supervisor support (PSS), illustrating reciprocation processes. In two samples, a survey methodology and Latent Moderated Structural (LMS) equation modelling were used to test our hypotheses. Overall, and although results were mixed and discussed, high PMCS, when combined with high trust or high PSS, resulted in safer behaviors. We did not find such significant effects as explaining routine violations. The patterns of results were similar in the two samples. The main limitations are the use of single-source and self-reported data may lead to common-method variance bias and the cross-sectional nature of the study. Future longitudinal research is needed to test causality. An important implication for companies is to be aware of the powerful role played by management: building trusting relationship (by behaving consistently regarding safety) and encouraging managers to show support to their employees in a context where safety is considered as important are keys to potentially achieve safe behaviors. [less ▲]

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See detailNon-Invasive Analysis of Mural Painting from a Late-Republican House (1st century B.C.) in Ostia
Strivay, David ULg; Herens, Elodie ULg; Morard, Thomas ULg et al

Conference (2017, May)

This paper is a comprehensive analytical study of the murals belonging to an ancient Roman house through the characterization of materials. The project focuses on the wall paintings of the Domus dei ... [more ▼]

This paper is a comprehensive analytical study of the murals belonging to an ancient Roman house through the characterization of materials. The project focuses on the wall paintings of the Domus dei bucranes, a house of the end of the Republican era discovered on the site of the Schola of Trajan in Ostia. This Domus has undergone several phases of development in the 1st century BC before being destroyed around 20 BC. A new house was immediately rebuilt after a major change from the ground, which allowed exceptional preservation of the decoration system. The results complement our knowledge of Roman painting techniques during the 1st century BC and also provide a comprehensive multidisciplinary approach to the problem of conservation of wall paintings. These two related objectives have been studied using non-destructive testing methods (MA-XRF, FTIR and Raman spectroscopy). The analyzes have been performed in situ using our mobile systems. The different set-ups had to be modified in order to be able to work on horizontal surfaces, specially our XRF scanner. The study of the pictorial layers address various issues in the field of archaeology: what technique has been implemented? Does the same technique was used in both phases of the development of Domus? Do they correspond to the techniques described by ancient writers? These responses are compared to those observed in other sets of murals dating from the 1st century BC. [less ▲]

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See detailWork environment and work-to-family conflict: Mediating role of work investment.
Babic, Audrey ULg; Stinglhamber, Florence; Barbier, Marie ULg et al

Conference (2017, May)

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See detailDes friches minières comme capital rural ?
Schmitz, Serge ULg

Conference (2017, May)

La communication a pour but de proposer un typologie théorique des friches minières et d'interroger leur potentiel de développement.

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See detailEvaluation of the implementation of integrated care for people with chronic conditions
Van Durme, Thérèse; Anthierens, Sibyl; Van Hecke, Ann et al

Conference (2017, May)

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See detailPreserving the Story of Heritage in Ruins Using Online Digital Repositories; The Case of Urbex
Eisazadeh, Negin ULg; Bordalejo, Barbara

Conference (2017, May)

Urban explorers have for some time been producing informal iconographic and textual records of manmade structures which because of being abandoned or inaccessible for the general public, are not usually ... [more ▼]

Urban explorers have for some time been producing informal iconographic and textual records of manmade structures which because of being abandoned or inaccessible for the general public, are not usually in the public eye and are often in a state of deterioration and in danger of being destroyed. This interdisciplinary research which connects the fields of architecture, history, conservation, and digital humanities, looks into the materials recorded by the urban exploration (urbex) community and investigates their potential for the protection and documentation of decaying or demolished abandoned architectural heritage sites. For the management and dissemination of heritage information for the abandoned sites, more specifically, the recently demolished Château de Noisy, a famous urbex destination in Belgium, this study explores and builds upon the existing digital resources and looks into various tools and techniques to compile, curate and present this data to narrate the story of abandoned heritage sites. Additionally, through visualisation of data collected, cleaned, and compiled using the Flickr application programming interface (Flickr API) and Python, the changes in the urbex community’s activity since their debut on Flickr are observed. This research shows the value of the existing urbex digital data for documentation and potential conservation of abandoned heritage sites and demonstrates how a mindful digital narration of even a demolished heritage site can create an engaging and immersive experience which records and preserves the heritage and its story. Additionally, it can raise public awareness which in the case of deteriorating abandoned sites can lead to their potential revival. [less ▲]

Detailed reference viewed: 22 (4 ULg)