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See detailProfiling inferior left dorsal premotor cortex: when Area 55b meets Premotor Eye-Field
Genon, Sarah ULg; Reid, Andrew; Langner, Robert et al

Poster (2017, June)

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See detailLes limites de l’administration de la PCL - R à une population de sujets schizophrènes dans le contexte médico-légal
Englebert, Jérôme ULg; Matteucci, Marie; De Page, Louis et al

Poster (2017, May 31)

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See detailTime, preference and intensity: A contrastive study of rather (than) and eerder (dan)
Ghesquière, Lobke; Brems, Lieselotte ULg

Conference (2017, May 24)

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See detailCe que devait encore révéler le site de la Schola del Traiano à Ostia Antica
Morard, Thomas ULg

Conference (2017, May 24)

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See detailL’impact de la réserve cognitive sur le fonctionnement exécutif au cours du vieillissement normal
Lesoinne, Alexia ULg; Simon, Jessica ULg; Gilsoul, Jessica ULg et al

Poster (2017, May 20)

Il existe une forte variabilité interindividuelle quant aux effets du vieillissement sur la cognition. Selon Stern (2009), les individus qui ont développé un haut niveau de réserve cognitive résisteraient ... [more ▼]

Il existe une forte variabilité interindividuelle quant aux effets du vieillissement sur la cognition. Selon Stern (2009), les individus qui ont développé un haut niveau de réserve cognitive résisteraient mieux aux effets du vieillissement. Afin de déterminer les facteurs de réserve cognitive qui expliquent le déclin exécutif dans le vieillissement, nous avons recruté 165 participants âgés de 59 à 81 ans. Ils ont effectué sept tâches évaluant le fonctionnement exécutif : des épreuves d’inhibition (Stroop et Incompatibilité de la TAP), de flexibilité (Flexibilité de la TAP, épreuve d’alternance arithmétique « plus-moins ») et de mise à jour (subtest Lettre-Chiffre de la MEM III, mise à jour de consonnes et tâche de 2-back). De plus, les participants ont complété différents questionnaires évaluant quatre facteurs de réserve cognitive (niveau d’études, parcours professionnel, activité physique et activités de loisir). Nous avons réalisé des analyses de régression linaire hiérarchique. Après avoir contrôlé les facteurs démographiques, nous avons observé que la réalisation d’au moins une activité culturelle au cours de la vie impactait positivement les capacités d’inhibition, alors que la mise à jour était impactée négativement par un trop grand nombre de loisirs domestiques. Lorsqu’on considère les loisirs actuellement pratiqués, nous observons que la réalisation d’au moins un loisir social a un impact positif sur la flexibilité alors que deux activités à caractère social sont nécessaires pour avoir un impact positif sur la mise à jour. En conclusion, nous observons un effet mitigé et différencié de la réserve cognitive sur le déclin exécutif. [less ▲]

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See detailLa reconnaissance de la maladie mentale : perspectives en troisième et en première personne
Englebert, Jérôme ULg

Conference (2017, May 20)

La distinction des perspectives en première et troisième personnes est un apport récent et décisif de la phénoménologie à la psychologie clinique et à la psychopathologie (Parnas, Sass & Zahavi, 2012). La ... [more ▼]

La distinction des perspectives en première et troisième personnes est un apport récent et décisif de la phénoménologie à la psychologie clinique et à la psychopathologie (Parnas, Sass & Zahavi, 2012). La perspective en troisième personne consiste en l’attribution, depuis une position externe, de signes cliniques repérés indépendamment du ressenti exprimé par le patient. L’exemple typique de ces signes est le délire et l’hallucination du schizophrène. Ces symptômes cristallisent les difficultés qu’éprouve le sujet à se reconnaitre affecté du trouble (l’anosognosie), et ce point est considéré par de nombreux modèles comme une cible thérapeutique prioritaire. Il est attendu que le patient adopte la position propre à son évaluateur, et externe à sa subjectivité intrinsèque. La perspective en première personne, concentre quant à elle son attention sur l’expérience subjective exprimée par le patient. Si l’on reprend le cas de la schizophrénie, ce sont la « perte de l’évidence naturelle » des choses, un « trouble du sens commun » ou un « sentiment de diminution du soi » qui sont verbalisés. Ce pas de côté de la vision omnisciente du médical, assumant une remise en cause du pouvoir de domination qu’entraine la perspective en troisième personne, se révèle être un outil psychothérapeutique pertinent. Il désacralise le problème de l’anosognosie et ouvre la voie à une perspective intersubjective, co-construite. Nous constaterons que la reconnaissance de la maladie en troisième personne, à laquelle on intègre une considération de la perspective en première personne, permet au patient d’être partie prenante du processus thérapeutique. [less ▲]

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See detailFormer des futurs logopèdes à l’Evidence-Based Practice : défis et perspectives
Maillart, Christelle ULg; Durieux, Nancy ULg

Conference (2017, May 20)

Dans cette première intervention de l'atelier intitulé "Impacts de la recherche sur les questions de société actuelles : importance de l’evidence-based practice", nous définirons l’EBP et illustrerons la ... [more ▼]

Dans cette première intervention de l'atelier intitulé "Impacts de la recherche sur les questions de société actuelles : importance de l’evidence-based practice", nous définirons l’EBP et illustrerons la façon dont cela est enseigné à la Faculté de Psychologie, Logopédie et des Sciences de l’Education de l’Université de Liège (ULg) à travers l’exemple de la formation en logopédie. Selon leur code déontologique, les logopèdes doivent offrir à leurs patients une prise en charge de la meilleure qualité possible, en tenant compte des spécificités et des préférences de chaque patient. Ces enjeux sont au cœur de l’approche EBP qui se définit comme l’intégration consciencieuse, explicite et appropriée des meilleures preuves issues de trois sources distinctes : 1) les preuves externes venant de la recherche scientifique ; 2) les preuves internes venant de l’expérience clinique ; 3) les preuves concernant les préférences d’un patient correctement et complètement informé. Les dispositifs pédagogiques mis en place à l’ULg pour former les futurs logopèdes à cette pratique ciblent les cinq étapes de la démarche EBP, à savoir : 1) transformer le besoin d’information en une question claire et précise, 2) trouver les meilleures données probantes issues de la recherche pour répondre à cette question, 3) évaluer de manière critique ces données, 4) combiner cette évaluation critique avec la compétence clinique du praticien et les caractéristiques individuelles du patient, ses valeurs et sa situation et 5) évaluer l’efficacité de la décision clinique et l’efficience personnelle à exécuter le processus de prise de décision. L’importance d’une approche intégrée et d’une pratique répétée sera soulignée. [less ▲]

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See detailSchizophrénie et psychopathie : Analyse des difficultés d’objectivation diagnostique à partir de la PCL-R
Matteucci, Marie; Englebert, Jérôme ULg; De Page, Louis et al

Poster (2017, May 20)

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See detailL'esprit des lieux
Durand, Pascal ULg

Conference (2017, May 19)

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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 detailRecollection versus familiarité dans le vieillissement normal et pathologique : Impact du format du test
Simon, Jessica ULg; Gilsoul, Jessica ULg; SALMON, Eric ULg et al

Poster (2017, May 19)

If familiarity is better preserved than recollection in aging and in the early stage of Alzheimer's disease (Koen & Yonelinas, 2014), the experimental conditions promoting its use should be beneficial to ... [more ▼]

If familiarity is better preserved than recollection in aging and in the early stage of Alzheimer's disease (Koen & Yonelinas, 2014), the experimental conditions promoting its use should be beneficial to these populations. One condition influencing the relative contribution of recollection and familiarity during recognition is the format of the test. The aim of this study was to investigate the impact of test format on recollection and familiarity in normal aging and in MCI in two tasks where the level of performance is equalized. Seventy young participants, 70 younger-old (55-69 years old), 69 older-old (70-85 years old), and 13 MCIs were presented with forced-choice and yes/no visual recognition memory tasks with the Remember/Know/ Guess paradigm. Young participants had better recognition memory performance than younger-old, who performed better than older-old and MCIs. Recollection and familiarity declined progressively in healthy aging. In MCI, recollection was more affected than familiarity, but patients demonstrated a more liberal use of familiarity. Finally, test format did not influence strongly the results. Young people used recollection more often in the forced-choice task compared to the yes/no task. [less ▲]

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See detailConclusions
Kéfer, Fabienne ULg

Conference (2017, May 19)

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See detailExploration des processus de recollection et de familiarité chez des patients présentant une plainte mnésique : une étude longitudinale
Simon, Jessica ULg; Collette, Fabienne ULg; SALMON, Eric ULg et al

Poster (2017, May 19)

Recollection refers to recall of details about past events, and familiarity is a feeling of oldness. In this study, we tested how recollection and familiarity are affected in patients with memory ... [more ▼]

Recollection refers to recall of details about past events, and familiarity is a feeling of oldness. In this study, we tested how recollection and familiarity are affected in patients with memory complaints compared to normal aging. We recruited 23 healthy older participants, 9 patients with subjective memory impairment (SCI) and 23 patients with mild cognitive impairment (MCI). Participants performed one 2-alternative forced-choice and one Yes-No recognition memory task including pictures and words, followed by a short neuropsychological evaluation. Fifteen healthy participants and 23 patients (9 SCI and 14 MCI) took part in a neuropsychological follow-up after a mean delay of 21 months. At inclusion, MCI patients had poorer performance in recognition than the other groups, which did not differ. MCI patients had worse performance regarding familiarity and recollection indexes compared to healthy controls and SCI, who exhibit similar performance. There was no interaction between groups and format or material. During the follow-up evaluation, five MCI returned to a normal level of efficiency and were considered as SCI. Based on the French adaptation of the free and cued selective reminding test (RLRI-16), we calculated cognitive decline curves in our patients. We observed that recollection and familiarity indexes were explained by the decline curves calculated on the number of freely recalled items. So, recollection and familiarity were used less efficiently in MCI than SCI although both groups complained about their memory. [less ▲]

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See detailTraiter l’alexithymie en Hôpital de Jour Psychiatrique : Identification des modulateurs favorisant une meilleure prise en charge
Nasello, Julian ULg; Servais, Catherine; Close, Mireille et al

Poster (2017, May 19)

L’alexithymie (i.e., incapacité à exprimer ses émotions par des mots) serait-elle sensible aux traitements psychothérapeutiques dispensés en Hôpital de Jour (HPJ) ? Quelles en seraient les variables ... [more ▼]

L’alexithymie (i.e., incapacité à exprimer ses émotions par des mots) serait-elle sensible aux traitements psychothérapeutiques dispensés en Hôpital de Jour (HPJ) ? Quelles en seraient les variables prédictives ? Notre recherche a porté sur 73 participants sélectionnés en HPJ et présentant des troubles de l’humeur. En comparant les scores d’entrée et de sortie, des réductions significatives ont été observées sur tous les aspects d’alexithymie. De plus, certaines variables impactant significativement sur l’alexithymie ont été mises en avant : variables démographiques (i.e., genre ; âge ; durée de séjour) ; médication ; variables du MMPI-2 ; support social perçu (PSS). Il apparait que le PSS ainsi que cinq variables mesurées par le MMPI-2 (e.g., les pratiques antisociales ou les attitudes négatives face au traitement) tendaient à réduire ou augmenter les niveaux d’alexithymie. Dès lors, ces résultats tendent à favoriser une conception plus flexible des traits de personnalité, à mettre en évidence le rôle fondamental de la régulation exogène des émotions et à fournir aux thérapeutes les variables à prendre en considération pour optimiser la prise en charge de l’alexithymie. [less ▲]

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See detailRadiohead and Prog Rock
Delville, Michel ULg

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

Conference (2017, May 18)

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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 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 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 detailLa maladie du Renard Wallon!
DETRY, Olivier ULg

Conference (2017, May 13)

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

Conference (2017, May 12)

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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 detailBelgian speleothem records Holocene cold events?
Allan, Mohammed ULg; Deliège, Adrien ULg; Nicolay, Samuel ULg et al

Poster (2017, May 12)

Speleothem is now regarded as valuable archive of climatic conditions on the continents, offering a number of advantages relative to other continental climate proxy recorders such as lake sediments and ... [more ▼]

Speleothem is now regarded as valuable archive of climatic conditions on the continents, offering a number of advantages relative to other continental climate proxy recorders such as lake sediments and peat cores. High spatial resolution measurements of Mg, Al, Sr, Ba were realized by using laser-ablation inductively coupled plasma mass spectrometry in the Belgian Pere Noel cave. A stalagmite from the Pere Noel (PN) cave representing 12000 years dated by U/Th method. Trace element variations in speleothem are a reflection of hydrochemical conditions. These changes were interpreted as indications of changes in climate in the Han-sur-Lesse region. The similar patterns found in δ 18O, δ 13C and chemical composition along the Pere Noel stalagmite suggests that trace elements in speleothems have the potential to provide high resolution insights into palaeoclimatic variability during the Holocene. A deeper analysis reveals several periods of significant rapid climate change during the Holocene (at 10.7-9.2 ka, 8.2-7.9 ka, 7.2-6.2 ka, 4.8-4.5 ka, and 3-2.4 ka BP), which are similar to the cold events detected from different natural paleoclimate archivers. A comparison between the geochemical analysis of Père Noël speleothem and solar activity (sunspot number) reveals a significant correlation. Spectral analysis methods reveal common solar periodicities (Gleissberg cycle, de Vries cycle, unnamed 500 year, Eddy cycles, and Hallstatt cycle). The geochemical analyses have the potential to prove that PN speleothem is sensitive to changes in solar activity on centennial and millennial timescales during the Holocene. [less ▲]

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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 detailCrosstalk between VEGF and BMP9 pathway. Implications in HHT disease
Pollenus, Thomas ULg

Poster (2017, May 11)

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See detailDownstream Design for Biobased Processes
Pfennig, Andreas ULg

Conference (2017, May 11)

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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 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 detailStudy of the regulation of the operon ftsW-psr-pbp5 in Enterococcus hirae
Raymackers, Alice ULg; Maréchal, Maxime; Verlaine, Olivier ULg et al

Poster (2017, May 11)

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See detailInnovative silage additives to reduce proteolysis in the silo
Herremans, Sophie ULg; Decruyenaere, Virginie; Beckers, Yves ULg et al

Poster (2017, May 10)

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See detailLacustrine clay mineral assemblages as a proxy for land-use and climate changes over the last 4 kyr: The Amik Lake
El Ouahabi, Meriam ULg; Hubert, Aurelia ULg; Allan, Mohammed ULg et al

Poster (2017, May 10)

Lake sediments are sensitive to landscape changes and most of these changes seem to be modulated by land-use (anthropogenic factors) coupled to palaeoenvironmental/palaeoclimatic changes. In its detrital ... [more ▼]

Lake sediments are sensitive to landscape changes and most of these changes seem to be modulated by land-use (anthropogenic factors) coupled to palaeoenvironmental/palaeoclimatic changes. In its detrital fraction, the lacustrine sediments record the history of soil erosion within its catchment via the inputs of clays and others detrital products. Within a Mediterranean context, the study investigates the upper sediments infilling the central part of the Amik basin in southern Turkey. This tectonic basin was occupied and exploited by modern human at least since 6000-7000 BC. We focus on the clay mineralogy (x-ray diffraction on oriented aggregates) and magnetic susceptibility measurements (Bartington) of the sedimentary record in the area over the last 4000 years, to assess environmental changes in relation with the different land uses and/or weathering during the successive Bronze, Iron, Roman, Islamic/Ottoman and Modern civilizations. The clay fraction of Amik Lake sediments comprises smectite, kaolinite, illite, chlorite and chlorite/smectite mixed layers that are the inherited clay phases. A relative change in abundance and crystallinity and chemistry of illite attests that environmental conditions evolved in the Amik Plain from the Bronze to Modern Age in relation with climates and/or land-use changes. The history of the Amik Lake reveals different soil erosion episode. The most intense erosion phase occurred during the Bronze/Iron Ages as indicated by the clay and magnetic susceptibility proxies. The Roman period was an exceptional period with soil erosion products arriving from the watershed, probably due the water channelization. A reduction of soil erosion occurred during the post Roman period until nowadays. Significant pedogenesis transformations are evidenced, especially during the Islamic/Ottoman periods suggesting intense chemical weathering conditions related to climate change. [less ▲]

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See detailHunger Art and the Sensorium
Delville, Michel ULg

Conference (2017, May 10)

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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 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 detailValidation of a simplfied method for the crashworthiness of offshore wind turbine jackets using finite elements simulations
Pire, Timothée ULg; Echeverry Jaramillo, Sara ULg; Rigo, Philippe ULg et al

in Guedes Soares, Carlos; Garbatov, Yordan (Eds.) Progress in the Analysis and Design of Marine Structures (2017, May 08)

The work presented in this paper focuses on crashworthiness of jacket foundations used to support offshore wind turbines in moderately deep waters. In a previous research work, the authors have developed ... [more ▼]

The work presented in this paper focuses on crashworthiness of jacket foundations used to support offshore wind turbines in moderately deep waters. In a previous research work, the authors have developed a solver based on analytical formulations, derived from limit plastic analysis, to assess the damage of such foundations when impacted by a ship. The present paper describes the methodology followed to perform numerical validations of the theoretical developments, including a description of the finite element models, the computation hypotheses and the simulations performed using LS-DYNA code. Many parameters describing the collision scenario are investigated, namely the type, the mass, the initial velocity and the trajectory of the striking ship. Some comparisons between analytical and numerical results are finally shown. [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)

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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 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 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 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 ▲]

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

Conference (2017, May 04)

Detailed reference viewed: 16 (0 ULg)
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 detailHow to exploit bio- and CO2-based isocyanates-free polyurethanes for environmental and biomedical applications?
Gennen, Sandro ULg; Grignard, Bruno ULg; Alves, Margot et al

Poster (2017, May 04)

Polyurethane (PU) is one of the most important family of polymers that is largely used in coatings, foams, elastomers, sealants/adhesives in the building, automotive, household and biomedical sectors ... [more ▼]

Polyurethane (PU) is one of the most important family of polymers that is largely used in coatings, foams, elastomers, sealants/adhesives in the building, automotive, household and biomedical sectors. Classically, PU is produced by a step-growth polymerization between di- or polyols and di- or polyisocyanates. However, isocyanates are toxic and produced from even more toxic phosgene. To avoid the use of isocyanates, different synthetic alternatives for PUs have been developed. One of the most studied approaches relies on the step-growth polymerization between di- or polyamines and CO2-sourced di- or polycyclic carbonates, affording poly(β-hydroxyurethane)s (PHUs) that showed improved thermal, chemical and mechanical properties compared to conventional PUs. In this study, we would like to show how PHUs can be exploited to design (bio- and) CO2-based foams for thermal insulation as well as novel reinforced hydrogels for potential biomedical applications. First, we developed a highly efficient binary organocatalyst for the fast and selective synthesis of cyclic carbonates under very mild conditions from CO2 and various epoxides, including bio-based ones. Secondly, these cyclic carbonates were valorised as monomers for the preparation of foams and hydrogels based on PHUs. In this poster, we will describe the preparation and characterization of these PHU foams and hydrogels, and highlight their huge potential as thermal insulating materials (PHU foams) or as biomaterials for shock absorption properties (PHU hydrogels). [less ▲]

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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 detailQuantifying coral colony morphology to assess their roles in ecosystem processes
Chen, Qi; Yang, Emma; Sturaro, Nicolas ULg et al

Poster (2017, May 04)

Colony morphology is among the best predictors of the scleractinian coral’s function in the reef ecosystem. However, morphological traits are categorical and to convert this information into a ... [more ▼]

Colony morphology is among the best predictors of the scleractinian coral’s function in the reef ecosystem. However, morphological traits are categorical and to convert this information into a quantitative value remains a real challenge to quantify the influence of this parameter on ecosystem processes. Recently, the ratio between colony mass and surface area (CMA) has been proposed to represent a suitable proxy of species morphologies and their growth. Hypothetically, CMA could be used to assess a broad range of biological, ecological, and evolutionary processes in coral reef ecosystem. Here, we propose to test CMA as a predictor of coral morphology and focus on the intraspecific variation of this parameter. We used historical coral collection from the Museum of Zoology (National Taiwan University) and our own specimens collected from contrasting environments to establish a database of coral models using a high-resolution David 3D scanner. From these models, we extracted surface area and volume of the coral colonies. Colony mass was measured on a Mark S Bel balance. CMA was compared for its power in predicting species morphology with other traits such as skeleton density. Eventually, we tested the use of CMA at an intraspecific level to detect plasticity in growth rate. Our 3D models are available online (http://www.dipintothereef.com/corals.html) and constitute a valuable resource for estimating the roles of corals in the ecosystem. [less ▲]

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Peer Reviewed
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 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 detailSAFIR: a software for modeling structures in fire
Franssen, Jean-Marc ULg; Gernay, Thomas ULg

Poster (2017, May 02)

SAFIR is a computer program developed at University of Liege to model the behavior of building structures subjected to fire.

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See detailHybrid Fire Testing: A new approach for fire labs
Sauca, Ana ULg; Gernay, Thomas ULg; Mergny, Elke ULg et al

Poster (2017, May 02)

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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 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 detailCan any possible combination of modes improve intermodal attractiveness?
Mostert, Martine ULg; Caris, An; Limbourg, Sabine ULg

in Proceedings of the BIVEC-GIBET Transport Research Days 2017 (2017, May)

In its White Paper on Transport, the European Commission recognizes intermodal transport as an alternative solution to road transport. In practice, intermodal transport can be constituted by any ... [more ▼]

In its White Paper on Transport, the European Commission recognizes intermodal transport as an alternative solution to road transport. In practice, intermodal transport can be constituted by any combination of modes, while in the literature, intermodal transport is often modeled as a combination of modes in the order “road-rail/inland waterway-road”. This work develops a new intermodal allocation model which allows choosing between any direct (road, rail and inland waterways) transport and any intermodal transport chain constituted by up to three modes of transport. Intermodal solutions can pass through one or two intermodal terminals. Applied on experimental data at the European level, the model gives insight on the optimal flow distribution for economic objectives (optimization of transport operational costs) and environmental objectives (optimization of transport CO2 emissions and air pollution external costs). Results highlight that the traditional modeling of intermodal transport as a “road-rail/inland waterway-road” combination better fits economic than environmental objectives. [less ▲]

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See detailIs Young Adolescents’ Self-Esteem Predicted by Peer Acceptance? A Gender Perspective
Gaudet, Olivier; Vollet, Justin; Véronneau, Marie-Hélène et al

Poster (2017, May)

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See detailPlatelet-rich plasma versus hyaluronic acid to treat patellar tendinopathies
Kaux, Jean-François ULg; Roberjot, Mathieu; SAMSON, Antoine ULg

in The Future of Football Medicine (2017, May)

Introduction: The treatment of patellar tendinopathies could be difficult. This is the reason why new treatments have been developed, among which platelet rich plasma (PRP) injections. Some clinical ... [more ▼]

Introduction: The treatment of patellar tendinopathies could be difficult. This is the reason why new treatments have been developed, among which platelet rich plasma (PRP) injections. Some clinical series have previously evaluated the effect of PRP in the treatment of proximal patellar tendinopathies. Recent systematic review concluded that PRP could be recommend as a treatment in such indication (1). Recently, the viscoelastic properties of hyaluronic acid (HA) on liquid connective tissue have been proposed for the treatment of tendinopathies (2). Some fundamental studies show encouraging results on HA’s ability to promote tendon gliding and reduce adhesion as well as to improve tendon architectural organisation. Some observations also support its use in a clinical setting to improve pain and function. Purpose: We aimed to compare the effect of PRP injection versus two injections of HA after three months on patients who have a proximal patellar tendinopathy. Methods: Eleven leisure football players with proximal patellar tendinopathies being not relieved after minimum three months of physiotherapy treatments where included. Six of them (group 1: 29.5±9.9 y.o.; 78.9±12.8kg; 177.4±6;9cm) have received a leukocyte poor PRP injection (obtained using an aphaeresis machine) under US guidance. This technique of PRP collection enable to obtain reproducible pure PRP with the same chosen concentration of 850 000 platelets/microliter. The other five subjects (group 2: 29.3±8.1 y.o.; 77.1±10.6kg; 178.1±5.8cm) received two HA 2% (40mg/2mL) injections (2mL) at one week apart. All of them have benefited of standardized rehabilitation, 3 times a week. Concerning the evaluation of the pathology, algo-functional tests (visual analogic scale (VAS), pressure algometer, IKDC score, VISA-P score), isokinetics (Cybex Norm; concentric 60°/s (C60), concentric 240°/s (C240) and eccentric 30°/s(E30)) associated to VAS, along with the patellar tendon ultrasonography (US) have been realized over three times (pre-injection, after 6 weeks, after 3 months post-injections). Results: The results of VAS (p<0,01), algometric scores (p<0,01), IKDC scores (p<0,01) and VISA-P (p<0,01) show a considerable improvement in the two groups, but not for the US findings. For the group 1 (Table 1), isokinetic tests show significant results for the hamstrings in C60°/s with an improvement of maximum peak torque (p=0,01) for the pathological limb, a diminution (p>0,05) for the healthy limb and during the analysis of the bilateral difference (p=0,0002). For the group 2, the improvement of quadriceps maximum peak torque in C240°/s is significant (p>0,01) for the pathological knee after 6 weeks post-injections only. The VAS associated with isokinetic tests decreases significantly for all contraction modes after three months of study. Conclusions: Both PRP and HA can improve the symptoms of proximal patellar tendinopathy, even if the results are slightly better in the PRP group. [less ▲]

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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 detailSalmonella thyphimirium early onset neonatal sepsis
Thirion, Sophie ULg; RIGO, Vincent ULg; Snyers, Diane ULg et al

Poster (2017, May)

Background: Early onset neonatal sepsis due to salmonella spp is rare in developed countries. Vertical and horizontal transmissions were described, including faecal contamination of the birth canal. After ... [more ▼]

Background: Early onset neonatal sepsis due to salmonella spp is rare in developed countries. Vertical and horizontal transmissions were described, including faecal contamination of the birth canal. After a short incubation period, newborns may remain asymptomatic or present with sepsis or meningitis. Mortality rate as high as 58% were reported. Case Presentation Summary: We report a case of transplacental Salmonella Typhimurium infection in a premature infant. A mother with a one day history of fever and diarrhoea spontaneously delivered a premature boy at 35 weeks of gestation. On day 3, the infant presented with symptoms suggesting necrotizing enterocolitis: apnea, respiratory distress, feeding intolerance, bloody diarrhea and fever. Feeding were suspended and intravenous antibiotic therapy (ampicillin, amikacine and metronidazole) initiated. Laboratory data showed an inflammatory syndrome with elevated C-reactive proteine (71 mg/l), leukocytopenia (7270/mm3) and severe lymphopenia (580/mm3). Enterocolitis stage 1 (Bell classification) was diagnosed based on clinical and radiological evaluation. Salmonella spp were grown from the baby’s blood and stools and from the mother’s stools; the National Reference Center identified a Salmonella Typhimurium. Cerebrospinal fluid culture remained sterile. Clinical and biological evolutions were rapidly favourable with 14-days of cefotaxim IV. Maternal history revealed consumption of raw meat 3 days before delivery.Learning Points/Discussion: Salmonella spp should be considered in the differential diagnosis of early onset sepsis, particularly when mother presents gastrointestinal symptoms. Food safety education is crucial. The consumption of raw or uncooked meat during pregnancy should be avoided regardless toxoplasmosis immunization status. To avoid outbreaks in the neonatal ward (as reported in the literature), rapid detection and prompt institution of isolation and clustering measures are important. [less ▲]

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See detailEcomorphology of the axial skeleton in Odontocetes and Mysticetes
Gillet, Amandine ULg; Parmentier, Eric ULg

Poster (2017, May)

Ecomorphology concerns the study of the relationships between functional design and the environmental constraints acting on organisms. It aims to understand how the morphological variations among species ... [more ▼]

Ecomorphology concerns the study of the relationships between functional design and the environmental constraints acting on organisms. It aims to understand how the morphological variations among species can be related to environmental factors and impact fitness. Having a large diversity both in their morphology and ecology, the cetacean taxa appears to be the ideal taxa to tackle the relationships between the locomotor system and way of life. Different studies have already showed that the number and shape of vertebrae in different cetaceans can reflect the stiffness of the body and consequently can impact their swimming mode. The aim of this study is to establish relationships between characteristics of the vertebral column of different cetaceans and their ecology. Meristic and morphometric data were collected on the vertebrae (centrum lengths, heights and widths, neural spine heights and transverse processes lengths) of species of odontocetes housed in different Natural History Museums in the world (AM-ULg, RBINS, MNHN, SMNS, NRM, Queensland, PEM, Iziko). Preliminary results show clear morphological variations between species at the level of the number and sizes of vertebrae. There is a clear relationship between body size and number of vertebrae except in Delphinidae. This family has an important higher vertebral count. These differences should be related to different swimming modes and reflect the different ecological behaviours of the studied cetaceans. [less ▲]

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See detailL'enseignement-apprentissage du français dans le qualifiant : regards croisés
Scheepers, Caroline ULg; Outers, Pierre ULg; Werner, Anne-Catherine ULg

Poster (2017, April 29)

La présentation donne à voir les résultats partiels d'une recherche exploratoire qui a consisté à questionner les élèves et les professeurs de l'enseignement secondaire de transition et du qualifiant à ... [more ▼]

La présentation donne à voir les résultats partiels d'une recherche exploratoire qui a consisté à questionner les élèves et les professeurs de l'enseignement secondaire de transition et du qualifiant à propos de leurs représentations relatives à l'enseignement-apprentissage du français dans le qualifiant. Pour l'heure, nous disposons des réponses apportées par 30 enseignants et par 450 élèves. A terme, cinquante enseignants et 1000 élèves sont concernés. [less ▲]

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See detailA landslide susceptibility map of Africa
Broeckx, Jente; Vanmaercke, Matthias ULg; Duchateau, Rica et al

Conference (2017, April 28)

Studies on landslide risks and fatalities indicate that landslides are a global threat to humans, infrastructure and the environment, certainly in Africa. Nonetheless our understanding of the spatial ... [more ▼]

Studies on landslide risks and fatalities indicate that landslides are a global threat to humans, infrastructure and the environment, certainly in Africa. Nonetheless our understanding of the spatial patterns of landslides and rockfalls on this continent is very limited. Also in global landslide susceptibility maps, Africa is mostly underrepresented in the inventories used to construct these maps. As a result, predicted landslide susceptibilities remain subject to very large uncertainties. This research aims to produce a first continent-wide landslide susceptibility map for Africa, calibrated with a well-distributed landslide dataset. As a first step, we compiled all available landslide inventories for Africa. This data was supplemented by additional landslide mapping with Google Earth in underrepresented regions. This way, we compiled 60 landslide inventories from the literature (ca. 11000 landslides) and an additional 6500 landslides through mapping in Google Earth (including 1500 rockfalls). Various environmental variables such as slope, lithology, soil characteristics, land use, precipitation and seismic activity, were investigated for their significance in explaining the observed spatial patterns of landslides. To account for potential mapping biases in our dataset, we used Monte Carlo simulations that selected different subsets of mapped landslides, tested the significance of the considered environmental variables and evaluated the performance of the fitted multiple logistic regression model against another subset of mapped landslides. Based on these analyses, we constructed two landslide susceptibility maps for Africa: one for all landslide types and one excluding rockfalls. In both maps, topography, lithology and seismic activity were the most significant variables. The latter factor may be surprising, given the overall limited degree of seismicity in Africa. However, its significance indicates that frequent seismic events may serve as in important preparatory factor for landslides. This finding concurs with several other recent studies. Rainfall explains a significant, but limited part of the observed landslide pattern and becomes insignificant when also rockfalls are considered. This may be explained by the fact that a significant fraction of the mapped rockfalls occurred in the Sahara desert. Overall, both maps perform well in predicting intra-continental patterns of mass movements in Africa and explain about 80% of the observed variance in landslide occurrence. As a result, these maps may be a valuable tool for planning and risk reduction strategies. [less ▲]

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See detailOccurrence of greenhouse gases (CO2, N2O and CH4) in groundwater of the Walloon Region (Belgium).
Jurado Elices, Anna ULg; Borges, Alberto ULg; Pujades, Estanislao ULg et al

Conference (2017, April 28)

Greenhouse gases (GHGs) are an environmental problem because their concentrations in the atmosphere have continuously risen since the industrial revolution. They can be indirectly transferred to the ... [more ▼]

Greenhouse gases (GHGs) are an environmental problem because their concentrations in the atmosphere have continuously risen since the industrial revolution. They can be indirectly transferred to the atmosphere through groundwater discharge into surface water bodies such as rivers. However, their occurrence is poorly evaluated in groundwater. The aim of this work is to identify the hydrogeological contexts (e.g., chalk and limestone aquifers) and the most conductive conditions for the generation of GHGs in groundwater at a regional scale. To this end, carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) concentrations, major and minor elements and environmental isotopes were monitored in several groundwater bodies of the Walloon Region (Belgium) from September 2014 to June 2016. The concentrations of GHGs in groundwater ranged from 1769 to 100519 ppm for the partial pressure of CO2 and from 0 to 1064 nmol/L and 1 to 37062 nmol/L for CH4 and N2O respectively. Over- all, groundwater was supersaturated in GHGs with respect to atmospheric equilibrium, suggesting that groundwater contribute to the atmospheric GHGs budget. Prior inspection of the data suggested that N2O in groundwater can be produced by denitrification and nitrification. The most suitable conditions for the accumulation of N2O are promoted by intermediate dissolved oxygen concentrations (2.5-3 mg L−1) and the availability of nitrate (NO3 ). These observations will be compared with the isotopes of NO3 . CH4 was less detected and at lower concentration than N2O, suggesting that groundwater redox conditions are not reducing enough to promoted the production of CH4. The results will be presented and discussed in detail in the presentation. [less ▲]

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See detailThe Prediction-Focused Approach: An opportunity for hydrogeophysical data integration and interpretation
Hermans, Thomas ULg; Nguyen, Frédéric ULg; Klepikova, Maria et al

Conference (2017, April 28)

Hydrogeophysics is an interdisciplinary field of sciences aiming at a better understanding of subsurface hydrological processes. If geophysical surveys have been successfully used to qualitatively ... [more ▼]

Hydrogeophysics is an interdisciplinary field of sciences aiming at a better understanding of subsurface hydrological processes. If geophysical surveys have been successfully used to qualitatively characterize the subsurface, two important challenges remain for a better quantification of hydrological processes: (1) the inversion of geophysical data and (2) their integration in hydrological subsurface models. The classical inversion approach using regularization suffers from spatially and temporally varying resolution and yields geologically unrealistic solutions without uncertainty quantification, making their utilization for hydrogeological calibration less consistent. More advanced techniques such as coupled inversion allow for a direct use of geophysical data for conditioning groundwater and solute transport model calibration. However, the technique is difficult to apply in complex cases and remains computationally demanding to estimate uncertainty. In a recent study, we investigate a prediction-focused approach (PFA) to directly estimate subsurface physical properties from geophysical data, circumventing the need for classic inversions. In PFA, we seek a direct relationship between the data and the subsurface variables we want to predict (the forecast). This relationship is obtained through a prior set of subsurface models for which both data and forecast are computed. A direct relationship can often be derived through dimension reduction techniques. PFA offers a framework for both hydrogeophysical “inversion” and hydrogeophysical data integration. For hydrogeophysical “inversion”, the considered forecast variable is the subsurface variable, such as the salinity. An ensemble of possible solutions is generated, allowing uncertainty quantification. For hydrogeophysical data integration, the forecast variable becomes the prediction we want to make with our subsurface models, such as the concentration of contaminant in a drinking water production well. Geophysical and hydrological data are combined to derive a direct relationship between data and forecast. We illustrate the process for the design of an aquifer thermal energy storage (ATES) system. An ATES system can theoretically recover in winter the heat stored in the aquifer during summer. In practice, the energy efficiency is often lower than expected due to spatial heterogeneity of hydraulic properties combined to a non-favorable hydrogeological gradient. A proper design of ATES systems should consider the uncertainty of the prediction related to those parameters. With a global sensitivity analysis, we identify sensitive parameters for heat storage prediction and validate the use of a short term heat tracing experiment monitored with geophysics to generate informative data. First, we illustrate how PFA can be used to successfully derive the distribution of temperature in the aquifer from ERT during the heat tracing experiment. Then, we successfully integrate the geophysical data to predict medium-term heat storage in the aquifer using PFA. The result is a full quantification of the posterior distribution of the prediction conditioned to observed data in a relatively limited time budget. [less ▲]

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See detailN2O eddy covariance fluxes : from field measurements to flux analysis
Lognoul, Margaux ULg; Debacq, Alain ULg; Heinesch, Bernard ULg et al

Poster (2017, April 28)

N2O eddy covariance data were collected for a complete season of sugar beet crop (from first fertilization to harvest). Data treatment and preliminary results are presented.

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See detailPathological hip fractures
KURTH, William ULg

Conference (2017, April 28)

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See detailMotion analysis: a prevention tool
Schwartz, Cédric ULg; CROISIER, Jean-Louis ULg; Forthomme, Bénédicte ULg et al

Conference (2017, April 28)

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See detailGlobally significant greenhouse-gas emissions from African inland waters
Borges, Alberto ULg; Bouilon, S

Conference (2017, April 28)

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See detailPosterior approach in total hip arthroplasty
KURTH, William ULg

Conference (2017, April 28)

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See detail“New Ways of Working” and their managerial myths: the resurgence of liberation and distributed surveillance?
Jemine, Grégory ULg

Conference (2017, April 27)

Through this contribution we aim to explore how two well-known bodies of knowledge, namely the panopticism as developed by Foucault (2012) and the works from the Human Relations movement (Mayo, 1949) are ... [more ▼]

Through this contribution we aim to explore how two well-known bodies of knowledge, namely the panopticism as developed by Foucault (2012) and the works from the Human Relations movement (Mayo, 1949) are being reprocessed and reinjected by managerial actors in organisational projects of “modernisation” such as “New Ways of Working”. Nowadays, in open and flexible workspaces, visual and acoustic privacy at work tend to disappear (Van der Voort, 2004) which leaves room for a constant monitoring of employees’ behaviours, mainly performed by the peers (Sewell & Taskin, 2015). The old managerial myth of distributed surveillance resurfaces as everyone is in a position to monitor his colleagues, generating a global feeling of unease. Simultaneously several managerial discourses advocate for abolishing direct supervision and liberating the employees of the bureaucratic factors through self-managed teams and empowerment. The defenders of “freedom” in companies build their argumentation on former findings from the Human Relations movement such as the improved efficiency of small groups and the benefits of removing rules. In an historical perspective, we wonder why and how such elements of knowledge produced several decades ago now become performative in several Belgian companies. [less ▲]

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