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See detailLe Fonds Weissenbruch, une histoire de l'imprimé rejoint la sphère numérique : nouveaux outils, nouvelles méthodes, nouvelles recherches ?
Simon, Stéphanie ULiege

Conference (2017, November 23)

La numérisation a été intégrée comme une composante à part entière de l'intégration du Fonds Weissenbruch dans les Bibliothèques de l'Université de Liège. La mise en ligne des documents d'archives de ce ... [more ▼]

La numérisation a été intégrée comme une composante à part entière de l'intégration du Fonds Weissenbruch dans les Bibliothèques de l'Université de Liège. La mise en ligne des documents d'archives de ce fonds, via DONum, ouvre de nouvelles perspectives de recherche. La présente communication fait le point sur les objectifs de la numérisation, les outils développés et envisage quelques pistes de nouvelles exploitations. [less ▲]

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See detailApproches intégrées en Sciences Pharmaceutiques
Ziemons, Eric ULiege

Conference (2017, November 22)

Dans une approche davantage ciblée sur les compétences, les enseignants de filière des sciences pharmaceutiques ont décidé - plutôt que de reconfigurer complètement le programme de cours - d'implémenter ... [more ▼]

Dans une approche davantage ciblée sur les compétences, les enseignants de filière des sciences pharmaceutiques ont décidé - plutôt que de reconfigurer complètement le programme de cours - d'implémenter des activités permettant aux étudiants d'intégrer les acquis de différentes disciplines, tout en développant des softskills telles que le travail en équipe et l'expression orale. Elles comportent d'une part des activités de laboratoire consistant en des manipulations successives, issues de disciplines différentes, logiquement imbriquées et d'autre part des séminaires en petits groupes mixant travail de groupe et travail individuel, avec une grande part laissée à l'aspect collaboratif. Les différents types de séminaires implémentés sont soit centrés sur le médicament, avec comme productions finales attendues la réalisation d'un poster sur une molécule à usage pharmaceutique et d'un dossier fictif de type "autorisation de mise sur le marché", soit centrés sur le patient avec comme production finale la réalisation d'une vidéo à la pharmacie didactique simulant des entrevues pharmacien-patient. Une collaboration avec l'équipe de Psychologie sociale des groupes et des organisations (PSGO) a permis de renforcer le ciblage des softskills via notamment le coaching des groupes d'étudiants et la réalisation de vidéoscopies. [less ▲]

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See detailEvaluation of leaf area index of winter wheat canopy by means of ground-based stereoscopic vision
Leemans, Vincent ULiege; Glésener, Michaël; Dumont, Benjamin ULiege et al

Poster (2017, November 22)

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See detailLe journal encyclopédique et les lumières radicales: les cas Helvétius et d'Holbach
Teicher, Elie ULiege

Conference (2017, November 22)

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See detailEl gran vidrio de Mario Bellatin y Los topos de Félix Bruzzone: estudio comparado de dos obras (particularmente) silenciosas
Licata, Nicolas ULiege

Conference (2017, November 22)

Mario Bellatin, Félix Bruzzone; el acercamiento que proponemos puede parecer atrevido. En cierta medida, realmente lo es. Numerosas diferencias separan a estos dos artistas. Son geográficas ... [more ▼]

Mario Bellatin, Félix Bruzzone; el acercamiento que proponemos puede parecer atrevido. En cierta medida, realmente lo es. Numerosas diferencias separan a estos dos artistas. Son geográficas, generacionales, biográficas, y se reflejan a su turno, formal y semánticamente, en las dos obras que estamos a punto de comparar. Pero a pesar de esta catedral de diferencias nos parece que la pregunta de fondo que plantean El gran vidrio como Los topos es igual: ¿Cómo narrar lo inefable? Es en esta pregunta, y más precisamente en la respuesta común que aportan las dos novelas mencionadas, que se centra este trabajo. En primer lugar, inclinaremos la perspectiva hacia su modo ficcional. El gran vidrio y Los topos entablan una relación curiosa con la autoficción, dado que en una y otra novela la experiencia del escritor se diluye en una ficción saturada, insólita. Otra divergencia con la autoficción más convencional es que ambos textos están plagados de silencios. Después de analizar estas dos peculiaridades, especularemos en torno a los posibles motivos de esta poética a la vez insólita y silenciosa, que se sustentaría —tal es nuestra hipótesis— en la violencia que definió desde su nacimiento la existencia de ambos escritores. [less ▲]

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See detailLa pédagogie inversée à l'université: comment, pourquoi et pour quoi? Partage d’expérience dans le cadre du Master en Sciences et Gestion de l’environnement
Denayer, Dorothée ULiege; Semal, Nathalie ULiege

Conference (2017, November 22)

Les enseignants du Master en Sciences et Gestion de l'environnement ont à faire face à des enjeux pédagogiques de taille: un domaine complexe et qui traverse les frontières des disciplines, un public ... [more ▼]

Les enseignants du Master en Sciences et Gestion de l'environnement ont à faire face à des enjeux pédagogiques de taille: un domaine complexe et qui traverse les frontières des disciplines, un public diversifié et aux acquis variés et variables, une situation de master orphelin qui inscrit étudiants et enseignants dans des trajectoires hybrides. Tout cela appelle au décloisonnement. Certains enseignants ont cherché à y répondre en expérimentant des formes de décloisonnement et de pédagogie active active. L'exposé s'est concentré sur l'expérience la plus radicale de décloisonnement qui se trouve au coeur du cours "Approche intégrée d'une question d'environnement". Décloisonnement radical car il s'agit de faire entrer à l'université les acteurs concernés par une problématique environnementale - et plus seulement les experts - pour former un collectif d'apprentissage incluant les enseignants, les étudiants et les acteurs. Les rôles de chacun sont remis en cause dans ce dispositif pédagogique : les étudiants mènent une investigation en situation complexe plutôt qu'ils ne s'approprient des connaissances académiques ; les acteurs concernés apportent l'interdisciplinarité et les enjeux en contexte; les enseignants ne sont plus détenteurs et transmetteurs de connaissances, ils apprennent le cas d'étude en même temps que les étudiants et, au coeur de ce processus, les guident dans leur démarche en s'appuyant sur et en partageant leurs savoir-faire de chercheurs. L'enjeu de cette démarche pédagogique est, pour l'étudiant, de lui permettre de développer une capacité à entrer dans une problématique directement par des situations vécues et par les expertises différenciées, partielles mais néanmoins réelles de ces acteurs, et du point de vue de la pédagogie universitaire, de s'inscrire dans une logique situationnelle de la compétence. [less ▲]

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See detailTraduire le théâtre jeunesse de Sylvain Levey
Neelsen, Sarah ULiege

Conference (2017, November 22)

Présentation et discussion de la traduction d'un extrait de pièce de Sylvain Levey dans le cadre d'un programme de formation continue à destination des traducteurs et traductrices de théâtre. Mise en voix ... [more ▼]

Présentation et discussion de la traduction d'un extrait de pièce de Sylvain Levey dans le cadre d'un programme de formation continue à destination des traducteurs et traductrices de théâtre. Mise en voix avec des acteurs et actrices du Saarländisches Staatstheater de Saarbruck sous la direction de la metteuse en scène Leyla Rabih. [less ▲]

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See detailLE PARTENARIAT PUBLIC-PRIVE (PPP) EST-IL UN MODE DE COLLABORATION POUR REUSSIR L’ARGANICULTURE AU MAROC ?
Maatala, Nassreddine ULiege; Chati, Mohammed Taoufiq

Conference (2017, November 21)

The production of quality plants that adapt to severe water conditions and resist cryptogrammic attacks remains a necessary step for the development of the argane culture. In this context, the Public ... [more ▼]

The production of quality plants that adapt to severe water conditions and resist cryptogrammic attacks remains a necessary step for the development of the argane culture. In this context, the Public-Private Partnership (PPP) can be a way of collaboration to cope with this technical constraint by ensuring the highest quality plants and to promote investment and implementation projects. Indeed, risk sharing, considered the core of PPPs, can encourage private investors to make efforts to domesticate the Argane culture. The objective of this paper is to propose an analysis of the production system of arganiculture and propose a mode of public-private partnership in order to increase the success rate of the various projects of argane culture. [less ▲]

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See detailLes "maladies rares" en Belgique : Processus de co-construction d'un objet-frontière
Duysens, Fanny ULiege

Conference (2017, November 20)

La présentation a retracé l'évolution de la catégorie "maladies rares" à l'échelle internationale puis nationale, telle qu'elle se donne à observer aujourd'hui sur le terrain de la Belgique, tout en ... [more ▼]

La présentation a retracé l'évolution de la catégorie "maladies rares" à l'échelle internationale puis nationale, telle qu'elle se donne à observer aujourd'hui sur le terrain de la Belgique, tout en soulevant certains enjeux et défis relatifs aux processus de co-construction dont elle fait l'objet dans les rapports entre les multiples acteurs impliqués. En outre, dans le cadre de cette journée d’étude interdisciplinaire, la présentation visait à croiser les observations empiriques avec des réflexions épistémologiques et méthodologiques relatives aux pratiques de recherche en sciences sociales. Il s'agissait d'expliciter l'approche mise en œuvre pour étudier l'objet "maladies rares" : comment le suivre, le construire, puis le restituer dans l’analyse ? [less ▲]

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See detailLa mystification
Stienon, Valérie ULiege

Conference (2017, November 20)

Examen des acceptions historiques, des usages conceptuels et des mécanismes du rire de mystification, appuyé sur des exemples empruntés aux XIXe-XXIe siècles et à différents médias: histoire du livre ... [more ▼]

Examen des acceptions historiques, des usages conceptuels et des mécanismes du rire de mystification, appuyé sur des exemples empruntés aux XIXe-XXIe siècles et à différents médias: histoire du livre, spectacle télévisuel, émission radiophonique et fiction cinématographique. [less ▲]

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See detailEntre crise de la légitimité et impact sociétal: le double rôle critique des historiens
Regibeau, Julien ULiege

Conference (2017, November 18)

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See detailEntorse de cheville
COLLIN, Romain ULiege; Zahraoui, Yanis ULiege; Croisier, Jean-Louis ULiege et al

Conference (2017, November 18)

Les traumatismes de la cheville et les lésions qui en résultent sont les plus fréquentes des lésions ostéo-articulaires traumatiques. L’entorse de cheville, en particulier, représente un coût socio ... [more ▼]

Les traumatismes de la cheville et les lésions qui en résultent sont les plus fréquentes des lésions ostéo-articulaires traumatiques. L’entorse de cheville, en particulier, représente un coût socio-économique considérable. Cependant, au fil du temps, la problématique reste identique : comment assurer la meilleure prise en charge et éviter toute récidive ? En effet, on constate que le taux de récidive d’entorse de la cheville est éloquent dans certaines disciplines et que les critères de reprise sportive sont limités, contrairement à d’autres lésions ostéo-articulaires. Nous souhaitons, au travers de cet exposé, mettre en lumière certains facteurs de risque de récidive aux différents temps de la prise en charge. Dans un premier temps, nous abordons quelques entités nosologiques secondaires à un traumatisme de la cheville, et définissons les séquelles fonctionnelles à risque de récidive. Dans un second temps, nous mettons en contraste l’instabilité mécanique et fonctionnelle et développons les avancées en termes de rééducation. L’entorse latérale de cheville s’inscrit le plus souvent dans un mécanisme en inversion. En fonction de l’atteinte ligamentaire, des séquelles d’instabilité et de laxité peuvent apparaître. Les lésions ligamentaires de la syndesmose tibio-fibulaire peuvent être contemporaines d'entorses latérales. Les douleurs et l’instabilité futures potentielles s’expliquent notamment par le rôle biomécanique de la pince bi-malléolaire. L’entorse de l’articulation sous-talienne passe souvent inaperçue et s’associe le plus souvent à l’entorse latérale ou à l’entorse de Chopart. Elle peut être responsable du syndrome du sinus du tarse. La fissuration ou luxation des tendons des fibulaires reste souvent négligée. La douleur rétro-malléolaire externe et l’instabilité imputables à ces lésions justifient souvent une sanction chirurgicale. Les lésions ostéochondrales du dôme du talus s’expriment souvent par des douleurs en charge et une instabilité majeure. Enfin, une neurapraxie ou axonotmnèse par étirement du nerf fibulaire superficiel peut entrainer une instabilité par défaut de contraction des muscles fibulaires. L’entorse de cheville peut induire, dans une certain nombre de cas, une instabilité chronique dite « fonctionnelle », par opposition à l’instabilité mécanique décrite ci-dessus. Cette instabilité fonctionnelle peut être due à un déficit de force des muscles everseurs, une altération des informations proprioceptives venant de la cheville ou encore à un déficit du contrôle neuromusculaire. Les patients souffrant d’instabilité chronique rapportent des épisodes récurrents de dérobement de la cheville lors de leurs activités, ainsi qu’une sensation subjective d’instabilité et d’insécurité. Cette instabilité résiduelle constitue un facteur de risque de l’entorse qu’il faudra corriger afin de permettre une reprise de l’activité dans les meilleures conditions et avec un risque réduit de récidive. La rééducation sera orientée de manière à solliciter progressivement la cheville dans des conditions de plus en plus proche du geste lésionnel afin de stimuler les mécanismes physiologiques de protection de l’articulation. Outre l’instabilité, d’autres troubles tels qu’une diminution d’amplitude en extension dorsale de cheville ou un œdème péri-articulaire seront identifiés lors du bilan de rééducation. Ces troubles devront également faire l’objet d’une prise en charge afin d’avoir une correction des déficits la plus complète possible. Les traumatismes de cheville constituent un véritable problème de santé publique en lien avec leur fréquence de survenue et leur taux de récidive. La prise en charge d’un patient nécessite l’établissement d’un diagnostic précis dans un premier temps, et l’identification rigoureuse des facteurs de risque dans un second temps. Cela permettra au rééducateur d’orienter au mieux sa prise en charge et de ne négliger aucun déficit susceptible de provoquer un nouveau traumatisme. [less ▲]

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See detailUtilisation de la réalité virtuelle comme outil thérapeutique Quels sont les facteurs influençant son acceptation auprès des cliniciens ?
Marchal, Sylvie; Etienne, Anne-Marie ULiege; Willems, Sylvie ULiege et al

Poster (2017, November 18)

Le travail d’un psychologue, d’un neuropsychologue ou encore d’un logopède évolue constamment en fonction des apports de la recherche. L’efficacité de la réalité virtuelle comme outil thérapeutique est ... [more ▼]

Le travail d’un psychologue, d’un neuropsychologue ou encore d’un logopède évolue constamment en fonction des apports de la recherche. L’efficacité de la réalité virtuelle comme outil thérapeutique est étudiée et soulignée depuis une vingtaine d’années (Malbos et al., 2013). Néanmoins, actuellement, une minorité de cliniciens l’ont intégrée dans leur pratique (Gicquel, 2016). Le but de cette étude est d’identifier les facteurs ayant un rôle déterminant dans le choix des cliniciens d’utiliser la réalité virtuelle. Pour ce faire, nous avons effectué notre travail en deux étapes : l’élaboration d’un modèle conceptuel et l’élaboration d’un questionnaire visant à éprouver la pertinence du modèle proposé. Le modèle a donc été construit sur base de la littérature concernant l’acceptation d’une technologie (Azjen, 1985 ; Davis, 1989 ; Taylor et Todd, 1995 ; Venkatesh et al., 2008). Il soutient l’idée que l’intention de réaliser un comportement dépendrait de l’utilité perçue, de l’attitude, des normes subjectives et de la perception de contrôle comportemental. Ce modèle a ensuite guidé l’élaboration des items de notre questionnaire en adaptant ceux régulièrement proposés au sein de la littérature (Davis, 1989 ; Glegg, 2013 ; Venkatesh et al., 2008). Au niveau méthodologique, la diffusion du questionnaire s’est faite par internet au travers des réseaux sociaux et professionnels francophones. La participation se réalisait sur base volontaire. Ainsi, 98 personnes ont participé à notre étude (80 femmes, 18 hommes). Cet échantillon était composé de 71 psychologues (72,4%), 15 neuropsychologues (15,3%) et 12 logopèdes (12,2%). Parmi eux, 84 répondants (85,7%) n’avait jamais utilisé la réalité virtuelle dans un contexte clinique et plus de la moitié de l’échantillon s’estimait peu familier avec cette technologie ou les recherches sur son efficacité en clinique. En accord avec nos hypothèses, nos résultats indiquent que les cliniciens tendent principalement à se référer à la norme subjective, à leur perception de contrôle sur l’utilisation de l’outil ainsi qu’à leur attitude propre envers la technologie pour former leur intention d’utiliser la réalité virtuelle dans leur pratique clinique. Par contre, l’absence de significativité de l’utilité perçue est en désaccord avec notre hypothèse. Ceci pourrait potentiellement s’expliquer par la non-familiarité des répondants avec l’utilisation de l’outil virtuel. [less ▲]

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See detailLes biais attentionnels envers l’alcool chez les « petits consommateurs » vs « gros consommateurs » dans un environnement virtuel
Pollet, Hélène; Quertemont, Etienne ULiege; Bouchard, Stéphane et al

Poster (2017, November 18)

Introduction : Les personnes dépendantes à l'alcool montrent des biais attentionnels quand elles sont confrontées à des indices liés à l’alcool (Kreusch, Vilenne, & Quertemont, 2013). D’après le modèle de ... [more ▼]

Introduction : Les personnes dépendantes à l'alcool montrent des biais attentionnels quand elles sont confrontées à des indices liés à l’alcool (Kreusch, Vilenne, & Quertemont, 2013). D’après le modèle de Wiers et al. (2007), les biais attentionnels favoriseraient la consommation répétée de substances. Objectif : Cette étude exploratoire évalue dans quelle mesure la réalité virtuelle fournit un environnement permettant de tester ces biais attentionnels. Hypothèse : Les gros consommateurs d'alcool présentent des biais attentionnels plus fréquents et plus intenses que les petits consommateurs. Méthode : Un questionnaire en ligne permettant de recruter 24 petits et 24 gros consommateurs d’alcool a d’abord été administré afin de présélectionner les sujets. Les participants ont ensuite réalisé une tâche d’immersion dans un environnement virtuel de « bar ». Le nombre de zooms effectués sur les stimuli « bières » et le nombre de commentaires rapportés en lien avec l’alcool étaient mesurés. Directement après l’immersion, la Visual Analogue Craving Scale (VAS) leur était administrée afin d’évaluer leur envie de boire. Résultats : Les « gros consommateurs » présentent davantage de zooms sur les stimuli « bières » que les «petits consommateurs». De plus, les « gros consommateurs » présentent un score plus élevé à la VAS que les «petits consommateurs », ce qui témoignerait d’une envie de consommer plus élevée après l’immersion par rapport aux « petits consommateurs ». Cependant, aucune corrélation significative n’a été mise en avant entre le nombre de zooms effectués et le score à la VAS chez les « gros consommateurs ». Conclusion : En accord avec nos hypothèses, nos résultats ont montré que les gros consommateurs présentent davantage de biais attentionnels envers les stimuli liés à l’alcool que les petits consommateurs ». Cependant, de futures recherches sont nécessaires afin de pouvoir confirmer que la réalité virtuelle fournit un environnement qui permet de tester les biais attentionnels. [less ▲]

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See detailIntégrer l’aléatoire au processus de création
Hagelstein, Maud ULiege

Conference (2017, November 18)

Dans L’art comme expérience, le philosophe anglo-saxon John Dewey développe l’idée selon laquelle le « caractère abouti d’une expérience » ne s’applique pas qu’au résultat, il est « intermédiaire » autant ... [more ▼]

Dans L’art comme expérience, le philosophe anglo-saxon John Dewey développe l’idée selon laquelle le « caractère abouti d’une expérience » ne s’applique pas qu’au résultat, il est « intermédiaire » autant que « terminal » – au sens où chaque opération constitutive de l’action mérite la même attention et où la « finition » doit être continue. L’artiste vise donc une certaine indétermination de l’expérience, capable d’intégrer quand elles se présentent les contingences liées au réel. Sans quoi l’œuvre « court le risque d’être un produit mécanique ou académique » (Dewey J., 2010, p. 237). Virtuosité, maîtrise et technique (surtout quand elles se regardent) seraient des aptitudes néfastes à la vitalité de l’art. L’acceptation docile de la convention et la reproduction rigide d’une technique existante seraient les principaux ennemis de l’expérience artistique authentique (Dewey J., 2010, p. 89). Si l’œuvre doit idéalement rester ouverte aux accidents, aux transformations, aux détours, c’est donc dans l’idée d’annuler les éventuels effets de maîtrise et de déjouer l’idée de prouesse technique. Pour cela, il faut accepter que l’issue diffère de ce que l’on a planifié : « La véritable tâche d’un artiste consiste à construire une expérience cohérente sur le plan de la perception tout en intégrant constamment le changement au fur et à mesure de son évolution » (Dewey J., 2010, p. 105). Le modèle défendu par Dewey – et repris par les artistes dans les champs du dessin, de l’expression plastique et de la performance (happening) – manifeste une ouverture non seulement assumée mais recherchée aux accidents. Celle-ci tient à la nécessité d’élargissement de l’expérience artistique à ce qui dépasse la seule production de l’œuvre mais qui l’accompagne – depuis l’émergence de l’idée, en passant par toutes les errances ou erreurs, et jusqu’à l’accomplissement du projet, qui n’est pas une fin en soi mais qui poursuit l’ensemble de la démarche. [less ▲]

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See detailFirm Performance and Multi-Scale Territorial Resources in Wallonia: Towards a Model using Business Accounting?
Wilmotte, Pierre-François ULiege; Halleux, Jean-Marie ULiege

Poster (2017, November 17)

In Europe (and in Wallonia), most public policies related to regional development and economic development aim to stimulate/reinforce the ‘’territorial resources’’ in order to improve the competitiveness ... [more ▼]

In Europe (and in Wallonia), most public policies related to regional development and economic development aim to stimulate/reinforce the ‘’territorial resources’’ in order to improve the competitiveness of the (Walloon, Belgian or European) firms. For instance, in Wallonia, one of the key action of the Marshall Plan (i.e. the main regional strategy in the domain of economic development) aims to “mobilize the territory” (in French, « mobilisation du territoire à destination du développement économique »). In this perspective, our objective is to quantify and analyse the territorial resources that impact the performance of Walloon or Belgian firms, with the final aim to advice the policy makers and to improve the related public policies. This topic is related to questions such as: Does a better accessibility of economic estates improve the performance of firms? Are cultural amenities (in order to attract talents) and land prices (in order to reduce their costs) strategic competitive advantages for firms? The poster describes some methodological issues of (in general) the PhD research and (particularly) one part of the research, concerning a multivariate statistics analysis of business accounting. [less ▲]

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See detailVulnérabilité aux inondations dans le contexte des changements climatiques à New-Bell Ngangue, un quartier planifié de la ville de Douala, Cameroun
Amanejieu, Amelie ULiege; Feumba, Rodrigue Aimé; Ngoufo, Roger et al

Conference (2017, November 17)

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See detailRecent evolution of the coastline in the Gulf on Guinea. Example of Togo and Benin (2000-2015)
Ozer, Pierre ULiege; Hountondji, Yvon-Carmen; De Longueville, Florence

Conference (2017, November 17)

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See detailBig Data and Geomatics - Towards a new paradigm in spatial information management
Kasprzyk, Jean-Paul ULiege; Hallot, Pierre ULiege

Conference (2017, November 17)

Big Data and Geomatics : towards a new paradigm in spatial information management During the last decade, the technological advances allowed a massive acquisition of digital data whose volume grows ... [more ▼]

Big Data and Geomatics : towards a new paradigm in spatial information management During the last decade, the technological advances allowed a massive acquisition of digital data whose volume grows exponentially. Going from location-based social networks to smartphones, users produce huge amounts of data that are located in space and time. The various exploitations of these large and heterogeneous datasets have created a new field called “Big Data”. As most of these data are characterized by spatial and temporal components, it has become the next challenge to handle for geomatics researchers within the next incoming year. In this presentation, we provide an overview of the main domains in geomatics that are impacted by big data. Related fields are among other things: terrestrial spatial data acquisition where the rise of powerful laser scanners, that can acquire millions of points per second in order to precisely represent built heritage in 3D, revolutionized topography; Global Navigation Satellite Systems (GNSS), powered by the European constellation Galileo, imply original researches able to increase the position accuracy of a simple smartphone user; remote sensing is now enriched by a wide open access capability thanks to Copernicus satellites which provide timely information for the management of the environment. In order to effectively manage and analyse information related to each of these revolutions, Geographical Information System (GIS) research uses innovative data storage strategies based on CityGML for 3D data, semantic web linked-data and non-structured databases (NoSQL) for the integration of heterogeneous information, data warehouses and OnLine Analytical Processing (OLAP) for decision support. The presentation is based on concrete applications about smart cities, remote sensing, firefighting… [less ▲]

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See detailVulnérabilité et adaptation des communautés lacustres aux inondations à Sô-Ava dans la basse vallée de l’Ouémé au Bénin
Lokossou, Martin Augustin; De Longueville, Florence; Ozer, Pierre ULiege

Conference (2017, November 17)

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See detailGames to understand urban planning
Dethier, Perrine ULiege; Halleux, Jean-Marie ULiege

Conference (2017, November 17)

Planning is not anymore seeing as a neutral concept. During a long period planning has been conducted as a technical activity only. Nevertheless, space “is no longer a neutral category as it was between ... [more ▼]

Planning is not anymore seeing as a neutral concept. During a long period planning has been conducted as a technical activity only. Nevertheless, space “is no longer a neutral category as it was between the 1960s and the 1980s that is viewed as a container for economic and social processes, but is rather the result of social relations among people living in a certain area or region where culture and cultural influences play a crucial role”(Knieling & Othengrafen, 2009, p. xxiii)1. Planning is indeed deeply depending on cultural context of a country and a region. Since the 1990s, the term planning culture covers comparative spatial planning research. This concept can be define as “the collective ethos and dominant attitudes of planners regarding the appropriate role of the state, market forces, and civil society in influencing social outcomes” (Sanyal, 2005, p. xxi)2. To date, planning culture literature concentrates on listing the observations and expert analyses. Our goal is to operationalise this concept as a set of values and attitudes shared by a particular group of people. For this purpose, we use experimental economics to gain empirical evidences on planning practices. Our presentation will be structured in three parts. At first, we will develop the concept of planning culture and illustrate it by the comparison of planning in Belgium and in the Netherlands. Despite many common characteristics, planning in those two countries strongly differs. On the one hand, both countries are densely populated and their territories are relatively similar. Although, on the other hand, their urban form are highly contrasted. Indeed, Belgium is characterized by an extreme sprawl whereas Netherlands has controlled the sub-urbanization processes. The second part of our presentation will be dedicated to the explanation of experimental economics. Experimental economics are experiments motivated by economics questions. “Experiments are a controlled data generation process. ‘Control’ means that most factors which influence behaviour are held constant and only one factor of interest (the “treatment”) is varied at a time”(Croson and Gächter, 2010, p. 124)3. To illustrate the field, we will realise an experiment in real time with the audience.Finally, we will finish our presentation by presenting some results of our current research that intends to objectify the role of planning culture in urban development. Based on experimental economics, our research aims to study the risk aversion as well as the importance of trust and cooperation in the development of partnership. To do so, we have organized four experiments with urban planning stakeholders in three different countries: Belgium, the Netherlands and Norway. [less ▲]

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See detail« Cap-Haïtien » or « how to ‘construct’ a flood risk in a decade »
Gracius, Gracia Joseph; Clervil, Luc; Ozer, Pierre ULiege

Conference (2017, November 17)

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See detailPrecise Positioning in multi-GNSS mode
Deprez, Cécile ULiege; Warnant, René ULiege

Conference (2017, November 17)

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See detailPeople moved and will move again
Gemenne, François ULiege; De Longueville, Florence; De Bruyckere, Luka ULiege et al

Conference (2017, November 17)

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See detailWinter season changes in Belgium: the MAR model contribution to the CORDEX.be project
Wyard, Coraline ULiege; Doutreloup, Sébastien ULiege; Scholzen, Chloé et al

Conference (2017, November 17)

In the framework of the CORDEX.be project funded by Belspo, most universities and research institutes of Belgium have worked together in order to gather existing and ongoing Belgian research activities in ... [more ▼]

In the framework of the CORDEX.be project funded by Belspo, most universities and research institutes of Belgium have worked together in order to gather existing and ongoing Belgian research activities in the domain of climate modelling to create a coherent scientific basis for future climate services in Belgium. The Laboratory of Climatology of the University of Liège has performed climate simulations using the regional climate model MAR (“Modèle Atmosphérique Régional” in French) at a resolution of 5 km over the period 1959-2014. This research aims to study the evolution of several variables computed by MAR during the winters of the last 50 years. Except in snow accumulation, results show no statistically significant trend in winter temperature or precipitation in Belgium. This results from the strong influence of natural large-scale/low-frequency oscillations in the atmospheric circulation in winter such as the North Atlantic Oscillation. [less ▲]

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See detailHigh-resolution simulations of natural and agricultural ecosystems over Belgium with the CARAIB Dynamic Vegetation Model
Jacquemin, Ingrid ULiege; Dury, Marie ULiege; Henrot, Alexandra-Jane ULiege et al

Conference (2017, November 17)

CARAIB (for CARbon Assimilation In the Biosphere) is a state-of-the-art dynamic vegetation model (DVM), initially designed to study the role of the vegetation in the global carbon cycle and the vegetation ... [more ▼]

CARAIB (for CARbon Assimilation In the Biosphere) is a state-of-the-art dynamic vegetation model (DVM), initially designed to study the role of the vegetation in the global carbon cycle and the vegetation behavior as a function of climate and soil. Motivated by the requirements of ecosystem management and land use planning studies, CARAIB was recently improved so as to deal with both natural and agricultural ecosystems and at a high resolution of 1km over Belgium. A new module, for crops and meadows, was added in the model, which deals with the specific processes (phenology) and management (sowing, harvesting,…) of these ecosystems. The spatial and temporal validation was carried out with different data sources : agricultural statistics, eddy-covariance site, field measurements,… The addition of the crop module has led to the improvement of the surface scheme, from now on including dynamic land use and land cover information. As well as describes the evolution of physical and biological processes, CARAIB has become an interesting tool to assess the sustainability under climate change of the ecological systems, in particular by the approach of the ecosystem goods and services. Indeed, if some model outputs can be directly read as quantitative indicators of ecosystem services (e.g. carbon sequestration), we have translated some of them to get, e.g., the crop yield (from net primary productivity) or an estimation of the soil erosion for simulation at the parcel level (from runoff and parcels characteristics). But whether an ecosystem services or land use planning studies, the crucial point for CARAIB is the landscape dynamics, which is not considered by the model, in the absence of anthropogenic, economic and societal factors in the system. In order to overcome this lack, CARAIB is now coupled with an agent-based model (ABM), to compose a land surface dynamics (LSD) module. The productivity and growth of natural and managed vegetation is given by the DVM to the ABM, which determines the shifts in land use and land cover. The LSD module is able to represent the mutual interactions between ecological and socio-economic systems and thus, to assess the sustainability of the different climate and socio-economic scenarios tested. [less ▲]

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See detailRisk management in Ivory Coast: case study of population evictions in Port-Bouët, Abidjan
Comoe, Boua Raymond; Ozer, Pierre ULiege

Conference (2017, November 17)

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See detailContextual analysis of Algerian floods between 1921 and 2016
Nouri, Myriem ULiege; Halleux, Jean-Marie ULiege; Ozer, Pierre ULiege

Conference (2017, November 17)

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See detailSnoring: Surgical Options beyond UPPP & Tonsillectomy
POIRRIER, Anne-Lise ULiege

Conference (2017, November 17)

Core Message. Bring the ENT surgeon on board. ENT evaluation is even more indicated for OSA patients than for simple snorers. Snoring treatment never saved a marriage. Options extend far beyond surgery ... [more ▼]

Core Message. Bring the ENT surgeon on board. ENT evaluation is even more indicated for OSA patients than for simple snorers. Snoring treatment never saved a marriage. Options extend far beyond surgery. In case of surgery, options expand far beyond UPPP. [less ▲]

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See detailCoupling an atmospheric model to an ocean model to study air-ice-ocean interactions in Antarctica: challenges and applications
Kittel, Christoph ULiege

Conference (2017, November 17)

Interactions between atmosphere, ice sheet and ocean play a crucial role in the Antarctic climate. For example, sea-air exchanges in leads and polynyas can strengthen cyclonic activities by warming and ... [more ▼]

Interactions between atmosphere, ice sheet and ocean play a crucial role in the Antarctic climate. For example, sea-air exchanges in leads and polynyas can strengthen cyclonic activities by warming and water vapour loading of air masses while associated sea heat loss and brine rejection modify water density and contribute to the dense water formation. Due to the harsh weather conditions in Antarctica, climate and ocean models appear as suitable tools to complement the scarcity of observations and to study the Antarctic climate. Nonetheless, only few models are able to represent typical processes found at high latitudes such as katabatic winds, drifting snow for the atmosphere or sea ice formation, accretion and deformation for oceans. Furthermore, due to their high non-linearity, those processes are difficult to model as they occur at different spatial and temporal scales. Current models are often forced by outputs: atmospheric conditions are provided to ocean models and ocean models outputs are used as surface conditions in atmospheric models meaning air feedbacks on ocean (or inversely) are muted. One can think models should be coupled at each time steps to take into account instantaneous interactions. Nonetheless, this method involves (too) high computational costs. The main challenge of this coupling is to take into account air-ice-ocean interactions and the temporal scale of associated processes in order to define an appropriate coupling time step. We will present both ocean and ice-atmosphere processes relative to polar climates and the specificities of the two models as well as technical coupling aspects. [less ▲]

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See detailRiver, people and uncertainties : a socio-ecological resilience of Middle Senegal River Valley
Bruckmann, Laurent ULiege

Conference (2017, November 17)

In Senegal river basin, large dams were built during the 1980’s to secure water resources after a decade of water scarcity in the 1970’s: Manantali in the upper basin with a reservoir of 12km3 and Diama ... [more ▼]

In Senegal river basin, large dams were built during the 1980’s to secure water resources after a decade of water scarcity in the 1970’s: Manantali in the upper basin with a reservoir of 12km3 and Diama close to estuary to avoid saltwater intrusion during dry season. Senegal river water resources are known under the supervision of Senegal River Basin Development Organization (OMVS), which defines water allocation between different goals (electricity, irrigation, flood-recession agriculture). The Senegal river valley, located on northern part of the basin (with low precipitation < 300 mm), deals with different socio-ecological changes, following thirty years of dam management. Hydrological changes are characterized by a new hydrological regime, especially by a higher irregularity of annual flood. The main change is the development of an irrigated agriculture along the floodplain, and the valley is a strategic place for national rice production. In these context livelihoods are particularly affected by change and uncertainties around climate change, hydrology and economy. The agricultural landscape is currently remodeled around irrigation, where traditional activities are still included and combined. The aims of this communication is to determine the influence of both changes, socio-economic and hydro-climatic, in the reorganization of the agricultural landscape of the middle Senegal river valley, and especially the way they interact together. Water management at different scales (basin level versus local level), diversification of agriculture and socio-demographic dynamics are some important factors of the socio-ecological resilience of the middle Senegal river valley to uncertainties and mutations. [less ▲]

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See detailTo which extend inundations are influenced by urban patterns?
Bruwier, Martin ULiege; Archambeau, Pierre ULiege; Erpicum, Sébastien ULiege et al

Conference (2017, November 17)

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See detailGully erosion in Kinshasa: hydromorphogenic dynamics and development of prevention tools
Makanzu Imwangana, Fils; Moeyersons, Jan; Ozer, Pierre ULiege et al

Conference (2017, November 17)

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See detailUn autre regard sur la participation des écoles et des élèves à l’enquête du PISA
Raiche, Gilles; Béland, Sébastien; Magis, David ULiege

Conference (2017, November 16)

Le Programme international pour le suivi des acquis des élèves (PISA) a pour objectif de produire des indicateurs sur les habiletés et les connaissances qui contribuent au succès des élèves, des écoles ... [more ▼]

Le Programme international pour le suivi des acquis des élèves (PISA) a pour objectif de produire des indicateurs sur les habiletés et les connaissances qui contribuent au succès des élèves, des écoles, des systèmes éducatifs et des environnements d’apprentissage (CMEC, 2015, p. 7). Depuis 2000, l’enquête du PISA est planifiée à tous les trois ans pour les élèves de 15 ans en ciblant spécifiquement les matières suivantes : la compréhension de l’écrit, la culture mathématique et la culture scientifique. Dans le cadre de la dernière passation, les résultats des Canadiens à cette enquête ont été salués dans l’ensemble du pays : les élèves se classent dans le groupe des pays les plus performants pour toutes les disciplines couvertes. Par contre, le taux de participation des écoles ainsi que les taux d’exclusions des élèves au regard de divers handicaps, qui pourraient éventuellement avoir un impact sur les résultats et le classement international, ont été critiqués à travers le pays. Cette présentation a comme objectif d’étudier le rendement des élèves canadiens au programme international des acquis scolaires (PISA) entre 2000 à 2015 en fonction de différentes caractéristiques relatives à la participation des écoles et au taux d’exclusion des élèves présentant certains handicaps. Des modèles de régression linéaire à niveaux multiples sont utilisés à cette fin. [less ▲]

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See detailPratiques d’évaluation des acquis, ancienneté et attitudes face à l’évaluation
Romainville, Marc; Detroz, Pascal ULiege; Auquière, Amélie ULiege et al

Conference (2017, November 16)

La présente communication est issue d’une recherche plus globale visant à identifier et à mieux comprendre les pratiques d’évaluation des acquis des étudiants auxquelles recourent les enseignants de ... [more ▼]

La présente communication est issue d’une recherche plus globale visant à identifier et à mieux comprendre les pratiques d’évaluation des acquis des étudiants auxquelles recourent les enseignants de l’enseignement supérieur et en particulier les facteurs personnels (ancienneté, attitudes vis-à-vis de l’évaluation…) et contextuels (année d’étude, taille du groupe, disciplines…) qui influencent ces pratiques. Les données ont été recueillies en 2016, d’une part, via une enquête en ligne (élaborée à l’aide du logiciel d’enquêtes Qualtrics) auprès d’enseignants de l’enseignement supérieur belge francophone que ce soit à l’Université ou en Hautes écoles (2292 réponses) et, d’autre part, via 37 entretiens semi-structurés individuels réalisés auprès d’un échantillon de ces mêmes enseignants dans des filières d’études contrastées. Les résultats présentés dans le cadre de cette communication ont trait à l’impact de deux variables personnelles : l’ancienneté des enseignants et leurs attitudes vis-à-vis de l’évaluation. Autrement dit, on cherchera à savoir si l’ancienneté et le développement professionnel qui l’accompagne traditionnellement ont des incidences sur le type de pratiques d’évaluation des acquis des enseignants. En particulier, recourent-ils à des outils de plus en plus diversifiés ou ont-ils tendance à se spécialiser dans l’un ou l’autre ? Et si oui, pourquoi ? Accentuent-ils par ailleurs le recours à l’évaluation continue par rapport au poids du contrôle terminal ? On cherchera ensuite à comprendre comment les pratiques se reconfigurent en fonction des attitudes des enseignants vis-à-vis de l’évaluation et en particulier vis-à-vis de sa fonction et de son rapport à l’apprentissage : dans quel sens une conception davantage intégrative de l’évaluation colore-t-elle les pratiques déclarées d’évaluation ? [less ▲]

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See detailDwelling on Dwelling: Home and Nature in (Native) American Literature
Lombard, David ULiege

Conference (2017, November 16)

As Greg Garrard stresses, “[i]nterpretation and critique of the various inflections of dwelling is a major task for ecocritics interested in a predominantly political, rather than moral or spiritual ... [more ▼]

As Greg Garrard stresses, “[i]nterpretation and critique of the various inflections of dwelling is a major task for ecocritics interested in a predominantly political, rather than moral or spiritual, project of cultural critique that can take us beyond pastoral and nature writing, from the landscapes of leisure to the uneven terrain of real work” (2012). In this paper, I will examine American literary texts dealing with representations of dwelling or “home” as a refuge from the “tensions” or problems caused by modern civilisation and technology. Starting with Thoreau’s Walden (1854), I will focus on the relationships between such refuges, the natural environment, and socio-political critique. Indeed, Thoreau’s work displays a philosophy on nature and dwelling that has influenced other writers to ponder on the negative effects that modern technologies, capitalism and consumerism have had on the human self and, more largely, on our physical environment. Adopting an ecocritical perspective, I will therefore consider Thoreau’s stay in Walden Pond as well as Edward Abbey’s house trailer (Desert Solitaire, 1968), Christopher McCandless’s “magic bus” as depicted in Jon Krakauer’s Into the Wild (1992) or Ken Ilgunas’s “vandwelling” (Walden on Wheels, 2013) to study the socio-political and environmental concerns raised by dwelling experiences in such peculiar or isolated “homes”. Finally, I will also briefly discuss the Native American perspective through an analysis of Leslie Marmon Silko’s novel Ceremony (1977) as an example of the Laguna Pueblo’s perception of nature or the “land” as “home”. [less ▲]

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See detailUsage des boîtiers de vote électronique et développement professionnel de l’enseignant-universitaire
Detroz, Pascal ULiege; Younes, Nathalie

Conference (2017, November 16)

Les boitiers de vote font l’objet de très nombreux articles. Les auteurs cherchent par exemple à voir si l’utilisation de cet outil a un effet sur la motivation des étudiants et leur participation au ... [more ▼]

Les boitiers de vote font l’objet de très nombreux articles. Les auteurs cherchent par exemple à voir si l’utilisation de cet outil a un effet sur la motivation des étudiants et leur participation au cours (Caldwell, 2007), sur leur engagement (Mc Gowan et Gunderson,2010), sur le climat de classe (Bain et Przybyla, 2009) ou encore sur les apprentissages qu’ils réalisent (Preszler et al., 2007). Au final, comme souvent lorsqu’il s’agit de technologie, il semble que ce soit la pédagogie supportée par l’outil qui fasse la différence : l’usage sera pertinent s’il entre en résonance et en concordance avec une pédagogie efficace. Certes, l’outil en lui-même peut avoir un effet sur la pédagogie. Influencer, de par son fonctionnement - les possibilités qu’il offre, parfois les contraintes qu’il fait peser - la manière de concevoir des dispositifs pédagogiques. Il peut ainsi modifier le rapport des enseignants à leur pédagogie, c’est-à-dire, finalement, stimuler ou catalyser le développement professionnel des enseignants dans le domaine de la pédagogie universitaire. L’effet de l’outil et de son usage sur ce développement professionnel est au cœur de notre article. En effet, nous avons greffé - sur deux dispositifs d’accompagnement technopédagogique d’enseignants novices dans le domaine des BVE - un dispositif de recherche observant l’effet de cet usage accompagné. L’un de ces dispositifs d’accompagnement était court : l’enseignant est interviewé à deux reprises et observé lors d’une séance de cours durant laquelle les BVE sont utilisés. L’autre est plus long et comprend des autoconfrontations, des interviews, le recueil de l’avis des étudiants… La méthodologie utilisée dans cette étude, de type qualitatif, confirme notre intuition de départ : l’usage accompagné de BVE chez des enseignants novices peut, sous certaines conditions dont nous ferons état lors de la communication, accélérer le développement professionnel de ces derniers. [less ▲]

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See detailOut of hospital neonatal resuscitation: a control randomised study
Servotte, Jean-Christophe ULiege; Ghuysen, Alexandre ULiege; Simonet et al

Conference (2017, November 14)

Introduction : En 2014, 64 accouchements inopinés sont survenus en Wallonie. 5,3% des naissances ont nécessité une réanimation néonatale. Or, de nombreux professionnels de l’urgence terminent leur ... [more ▼]

Introduction : En 2014, 64 accouchements inopinés sont survenus en Wallonie. 5,3% des naissances ont nécessité une réanimation néonatale. Or, de nombreux professionnels de l’urgence terminent leur formation avec une expertise insuffisante dans ce domaine (Nadel et al. 2000). En effet, la réanimation néonatale nécessite des compétences cognitives, techniques et comportementales spécifiques (Halamek et al. 2016). Objectifs : Notre étude randomisée contrôlée a évalué l’impact d’une formation utilisant la simulation clinique sur l’évolution des connaissances et des compétences techniques en réanimation néonatale, avec l’hypothèse que cette méthode a un impact supérieur à l’enseignement clinique traditionnel. Matériel & Méthodes : Des infirmiers se spécialisant en soins intensifs et aide médicale urgente (SIAMU) ont été assignés, après randomisation, à un groupe expérimental (GE) ou à un groupe contrôle (GC). Le GE a reçu un cours théorique suivi d’une formation par simulation (2h) et de 4 semaines de stage. Le GC a reçu un cours théorique suivi de 4 semaines de stage. La population a été évaluée à 2 reprises au moyen d’une simulation de réanimation néonatale et de questionnaires: avant et après la formation, à 4 semaines d’intervalle. Deux experts ont évalué à l’aveugle sur base d’une grille critériée les compétences techniques lors de la simulation. Résultats : 36 participants ont été inclus dans l’étude. Les 2 groupes ont amélioré leurs connaissances. Comparativement, le GE a davantage amélioré ses connaissances globales (p = 0,0001) et spécifiques (p = 0,0007). La formation a permis une amélioration des compétences techniques de 83,3% pour le GC et de 175% pour le GE. Cette différence est significative (p = 0,003). Conclusions : Les deux méthodes pédagogiques ont amélioré les connaissances et les compétences techniques des infirmiers SIAMU. Toutefois, l’impact est significativement supérieur en faveur de la formation utilisant la simulation par rapport à l’enseignement clinique traditionnel. [less ▲]

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See detailSowing flower strips in a wheat field to enhance biological control of aphids and support pollinators
Amy, Clara ULiege; Brigode, Mélanie ULiege; Hatt, Séverin ULiege et al

Poster (2017, November 14)

Insect pests are responsible, among other factors, for reducing the productivity of crops. While chemical insecticides used to control them cause harmful effects on human health and the environment ... [more ▼]

Insect pests are responsible, among other factors, for reducing the productivity of crops. While chemical insecticides used to control them cause harmful effects on human health and the environment, conservation biological control, i.e. managing habitats in agricultural landscapes to support pest natural enemies, turns out to be a promising approach. Moreover, the decline of pollinators in agricultural areas is observed since a few decades, being partly due to the intensification of agriculture which homogenizes and degrades agricultural landscape. To reduce the detrimental effects of agricultural intensification on biodiversity, ecosystem functioning and ecosystem services, farmers have the opportunity to adopt agri-environmental measures. Among them, the establishment of flower strips, with a recognized interest in biological control and the conservation of pollinators, is proposed. However, their establishment is not systematically efficient and profitable for the farmers. Adapting mixture composition to farmer’s need may encourage their adoption. Thus, the research project has a double goals (i) to provide intercropping flower strips for promoting the attraction of beneficial insects against pests and for promoting pollinators diversity; and (ii) to suggests diversification of farm income by planting monospecific oilseed flower strips. [less ▲]

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See detailDie Rhetorik des Friedens von Romain Rolland: ein Einfluß von Nietzsche
Franck, Thomas ULiege

Conference (2017, November 11)

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See detailRapid changes in preoptic estradiol concentration during male sexual behavior
de Bournonville, Marie-Pierre ULiege; de Bournonville, Catherine; Ball, Gregory et al

Poster (2017, November 11)

Estrogens such as estradiol (E2) exert pleiotropic effects on physiological and behavioral responses such as neuroprotection, aggression or reproduction. Estrogens derived from local brain synthesis ... [more ▼]

Estrogens such as estradiol (E2) exert pleiotropic effects on physiological and behavioral responses such as neuroprotection, aggression or reproduction. Estrogens derived from local brain synthesis (neuroestrogens) are critical for the regulation of different functions including the control of male sexual behavior. Classically, E2 acts through effects initiated in the nucleus to regulate male sexual function. Along with these long-term effects, E2 also acts rapidly (within minutes) via membrane-initiated events. These effects are thought to depend on short-term variations in the local production of estrogens, through rapid fluctuations of the enzymatic activity of brain aromatase. In Japanese quail, rapid modulations of brain aromatase activity (AA) have been reported after sexual interactions or exposure to an acute stress. These changes take place mainly in the medial preoptic nucleus (POM), a sexually differentiated structure that plays a key role in the control of male sexual behavior and where aromatase is densely expressed. Yet, it has recently been shown that, in the short term, AA does not always reflect local E2 concentration. This study was designed to determine by in vivo microdialysis whether local E2 concentrations fluctuate during sexual interactions and test whether these changes parallel the decrease in AA observed ex vivo after copulation. We first conducted a series of experiments to validate the microdialysis and E2 assay. When dialysis probes were placed in successive baths containing known increasing amounts of E2, proportional changes in E2 concentration were measured in the dialysate. Moreover, a rise in E2 concentration was detected after in vivo retrodialysis of testosterone only if the probe was located within the POM and, after a peripheral injection of E2, a sharp rise of E2 was detected regardless of the probe location. Together these results show that in vivo microdialysis is a valid method to assess endogenous fluctuations of brain E2 concentrations in behaving animals. Two independent experiments then identified a rise in E2 concentrations in POM during sexual interactions. This increase occurred within 10 min after the initiation of the sexual interaction and was specific to the POM as there was no increase in E2 concentrations in males that had their cannula outside of this area. Together these data confirm that rapid changes in AA measured ex vivo cannot be considered as a reliable proxy for E2 concentrations. The discrepancies could originate either from the different time resolution related to the two techniques or from differences in the microenvironment in which aromatase functions in vivo and during ex vivo assays. [less ▲]

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See detailAction-Based Language Gestalts in Working Memory
Dumitru, Magdalena ULiege

Conference (2017, November 11)

While evidence is mounting that perceptual grouping cues bene t working memory performance, it is debatable whether this is the main purpose of Gestalt formation. Indeed, recent ndings by Dumitru and ... [more ▼]

While evidence is mounting that perceptual grouping cues bene t working memory performance, it is debatable whether this is the main purpose of Gestalt formation. Indeed, recent ndings by Dumitru and colleagues demonstrate that people build language Gestalts that encode basic action patterns when reasoning with the connectives ‘and’ and ‘or’. Here we present novel evidence from dual memory tasks that Gestalt formation and maintenance breaks down under high working memory load for two age groups (18 to 30 year olds and 60 to 80 year olds). More importantly, the number of Gestalts evoked by the connectives (one for conjunction and two for disjunction) as well as the age-speci c performance levels with visual Gestalts predict the observed e ects. Well-established mappings between language and action patterns are thus a driving factor of Gestalt building and management in working memory. [less ▲]

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See detailHow PE teacher’s role as physical activity promotor is perceived by the students? Comparison in Quebec and Wallonia
Grenier, Johanne; Carbonneau, Ulysse; Cloes, Marc ULiege

Conference (2017, November 10)

Promoting a physically active lifestyle and preparing life-long physically educated citizens are the main objectives of any PE teacher worldwide. Nevertheless, in some countries, this objective is ... [more ▼]

Promoting a physically active lifestyle and preparing life-long physically educated citizens are the main objectives of any PE teacher worldwide. Nevertheless, in some countries, this objective is required by the curriculum while, in other, it remains an implicit priority. Such difference is noticed between Quebec and Wallonia. Since 2001, the Quebec Ministry of Education decided to entrust PE and health education to PE teachers. In the same time, in Wallonia, PE remained mainly focused on traditional topics such as motor/sports skills, fitness and social development. This could explain why Wallonian students consider that their school experience does not contribute to the development of their physically lifestyle. The aim of this study is to compare the students’ perceptions of the pedagogical approaches of the PE teachers in both countries. An online questionnaire was developed in order to determine how much the PE teacher contributes to motivate the students to be physically active, to provide confidence to the students to adopt a physically active lifestyle, to improve students’ knowledge about physical activity, and to make them autonomous active citizens. Data were collected in Quebec (193 students of 6 teachers) and in Wallonia (280 students of 11 teachers). An inductive system of categories was developed for the answers to the open questions (inter-analyst reliability > 86%). The current data analysis shows that students’ answers from both countries can be classified in the same categories. Additional treatments are needed to determine if they differ. On the other hand, pedagogical approaches described by the students are really diverse. Even when the educational requirements are not explicitly focused on the promotion of a healthy lifestyle, students mention that their PE teachers behave in a way to support their active behaviour. However, specific interventions do not seem to be well identified. [less ▲]

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See detailCuriosity, concentration and motivation Emotion-cognition process of the first 10 minutes of the Japanese Language course
Goto, Kanako ULiege

Conference (2017, November 10)

What could be the best way to increase students’ curiosity, concentration and to solidify their motivation for Japanese learning as a foreign language? During my modest experience of Japanese Language ... [more ▼]

What could be the best way to increase students’ curiosity, concentration and to solidify their motivation for Japanese learning as a foreign language? During my modest experience of Japanese Language teaching for Belgian French-native students, I observed a quite interesting fact. It seems that when a student, at the beginning (or during) the course, feels some strong, deep emotions, linked to the matters presented by the teacher, he/she will memorize more deeply the contents of the course, and will remember them long time after his/her learning period. This presentation aims to show several examples of these “emotion-cognition process”, which seems to be decisive for building a solid learning environment, in particular during the first 10 minutes of each course. [less ▲]

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See detailL’ethnopharmacologie, à l’origine de nombreux médicaments
Frederich, Michel ULiege

Conference (2017, November 10)

L’ethnopharmacologie peut être définie comme « l’étude scientifique interdisciplinaire des matières d’origine végétale, animale ou minérale, et des savoirs et pratiques s’y rattachant, que les sociétés ... [more ▼]

L’ethnopharmacologie peut être définie comme « l’étude scientifique interdisciplinaire des matières d’origine végétale, animale ou minérale, et des savoirs et pratiques s’y rattachant, que les sociétés mettent en œuvre à des fins thérapeutiques, curatives, préventives ou diagnostiques ». De nombreux médicaments indispensables aujourd’hui sont issus de ces connaissances traditionnelles : on peut citer par exemple l’universelle Aspirine®, provenant du saule, ou la quinine, médicament du paludisme, issu du quinquina Sud-Américain. Aujourd’hui encore, selon l’OMS, 80% de la population mondiale a recourt, en première intention, aux plantes médicinales pour se soigner. Néanmoins, ces connaissances traditionnelles sont aujourd’hui menacées, que ce soit pour des raisons d’appauvrissement de la biodiversité, ou de déstructuration des sociétés et des connaissances traditionnelles. 1. Fleurentin, J. Traditions thérapeutiques et médecine de demain. 2011. Editions Ouest-France. [less ▲]

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See detailImplementation of "Parler-Bambin" preventive program in the multilingual and multicultural context of nurseries/daycares in Lebanon
Moitel ép Messarra, Camille ULiege; Maillart, Christelle ULiege

Poster (2017, November 10)

This project is targeting prevention programs for language and communication difficulties in nurseries in Lebanon. More specifically, it will explore the implementation of a preventive program to enhance ... [more ▼]

This project is targeting prevention programs for language and communication difficulties in nurseries in Lebanon. More specifically, it will explore the implementation of a preventive program to enhance language skills in early childhood, and to specify the role of the Speech and Language Therapist (SLT) in this implementation. There is a growing consensus among researchers and clinicians that abilities acquired at an early age, especially in oral language, are predictive of children's academic performance and future social integration (Zorman, 2011). Preventive actions are increasingly recognized as a priority to improve public health worldwide (Law et al., 2013). In Lebanon, an ongoing national program (MHPSS 2015-2021 - MHPSS, Preventive and Curative, Ministry of Public Health, 2015) is taking part of this kind of healthcare development. Aims: Thus, taking into account some variables that affect the implementation process (environment communities, providers, prevention delivery system and the prevention support system), the aims of this project are 1) to study the feasibility of a preventive program model, that partners Speech and Language Therapist and educators or caregivers in daycare and nurseries, to facilitate language and communication in Lebanese toddlers (under 3 years old), 2) determine the success factors of the implementation. It will be based on a French program “Parler Bambin”, which is currently widely developed in France. Method: The first study will focus on the factors of engagement of different stakeholders in a prevention program: firstly, by identifying the professionals involved in nurseries in Lebanon and then identifying the characteristics of these stakeholders in diverse childcares. Data will be gathered through a questionnaire constructed or adapted from existing questionnaires for this purpose (eg, Preschool Teacher Literacy Beliefs Questionnaire [TBQ], Hindman and Wasik, 2008). Similarly, the questionnaires will address SLT’s representations about their role in supporting language in nurseries. Nominal groups or focus groups (Baribeau and Germain, 2010) and questionnaires will be also carried out to identify the facilitators of this kind of preventive actions and the specific needs of SLTs in preventive settings. A second phase will target the implementation process itself: adapting and implementing a preventive intervention, while taking into consideration implementation aspects. We will find out major variables that are worthy for the program’s implementation, by measuring its fidelity (dosage, quantity, intervention strength, quality, participant responsiveness, program differentiation, etc.), also using videos and direct coaching sessions. Pre and posttest measures will be applied on children (MCDI -The MacArthur communicative development inventories, Fenson et al., 1996; Questionnaire for parents of bilingual children LITMUS-PABIQ, COST IS0804, validation in Lebanon, Tuller 2015). Finally, following the pilot study, the implementation of the adapted program will be proposed according to different execution modalities to support its implementation: with a direct or indirect involvement of an SLT. It will be tested more widely, with particular focus on the role of the speech therapist. Evaluation measures similar to those presented in Phase 2 will be carried out. Expected results: This project will highlight the added value of speech therapy in setting up a prevention program. It also participates in the elaboration of a national strategic framework for the Speech and Language Therapy [less ▲]

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See detailTeacher-SLT co-intervention program to support language in kindergartens in Lebanon: methodology, procedures and measures
El Kouba, Edith ULiege; Maillart, Christelle ULiege

Poster (2017, November 10)

Background: The aim of this project is to develop a co-intervention program, lead by a teacher and an SLT, to support oral language in preschoolers in the Lebanese context (multicultural, multilingual ... [more ▼]

Background: The aim of this project is to develop a co-intervention program, lead by a teacher and an SLT, to support oral language in preschoolers in the Lebanese context (multicultural, multilingual). Actually, there is a growing consensus, that efforts to enhance children’s early language skills, can improve their reading skills and long-term academic achievement. However, some children are at risk of delays due to diverse environments (e.g. low socioeconomic status), and impoverished language and literacy experiences. Thus, international recommendations highlight the necessity for SLTs to conceptualize their intervention, according to community based needs, focusing on primary prevention for early communication and language difficulties, given their later impact on social and professional integration (Law 2013). Aims: In line with the recommendations of the Ministry of Public Health in Lebanon (Mental Health program services MHPSS, preventive and curative, Ministry of Public Health, 2015), the purpose of the project is to support language skills in preschoolers by adapting, implementing and analyzing co-intervention program that partners early childhood educators along with SLTs. Methods: First, we will identify the beliefs, representations and expectations of the different stakeholders (teachers, speech-language pathologists, school principals) through questionnaires and interviews among the diverse Lebanese school contexts in order to 1) identify the knowledge and 2) gather their expectations in the area of support and prevention for language difficulties in kindergarten. Second, the project aims to identify the quality of teacher-child interaction, considered as one of the primary mechanism that foster the development of child’s language competences. It is commonly assessed by using the Classroom Assessment Scoring System (CLASS-K; Pianta, La Paro, & Hamre, 2008). Ten dimensions will be considered: climate (positive or negative), teacher sensitivity, children's perspectives, behavior management, productivity, teaching practices and learning formats, concept Development, quality of feedback provided to the child, and linguistic modeling. Finally, we will design a co-intervention program that is the most consistent with the contextual, cultural and linguistic diversity in Lebanon. Two intervention settings will be addressed and compared: 1) a co-intervention with an SLT including direct coaching, and video-retroactions and 2) an implementation of the program led by the teacher after a training provided by an SLT. We will collect information about children’s bilingual environment through the Parental Bilingual Questionnaire (PABIQ-LITMUS, COST Action IS804), and we will evaluate interactions through CLASS-K (Pianta, La Paro, & Hamre, 2008), pre and post evaluation. Children's language skills will be measured through: ELO-L (Zebib, Khomsi, Henry, Messarra, & Kouba Hreich, Lebanon Tests Editions, 2017). Moreover, measurements of the fidelity of program’s implementation (dosage, adhesion, quality of the interactions, responsiveness) will also be carried out. Results: The expected results are intended to demonstrate to which extent an intervention program, to enhance communication and language skills, carried out jointly by teachers and speech therapists, would be more effective than a program delivered without the intervention of SLTs. The intervention of speech-language pathologists would thus have a more effective impact on the teachers' practices and the language skills of the children. This would justify the primary role of SLTs in indirect interventions in preschools in Lebanon. [less ▲]

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See detailInjection of spin-polarized current in a Ge-based magnetic device with coplanar contacts
Fourneau, Emile ULiege; Avila Osses, Jonathan ULiege; Silhanek, Alejandro ULiege et al

Poster (2017, November 09)

Electron spin injection and spin detection in magnetic materials are key features to the functionalization of electron spin polarization as a degree of freedom for both information processing and storage ... [more ▼]

Electron spin injection and spin detection in magnetic materials are key features to the functionalization of electron spin polarization as a degree of freedom for both information processing and storage. Currently, spin-dependent tunneling in magnetic junction devices is the most common approach to achieve efficient spin injection. However, many recent studies highlighted the interesting possibility to create spin-polarized currents in structures which combine a magnetic semiconductor, e.g. magnetic alloys based on group-IV semiconductors or diluted magnetic semiconductor compounds, forming a Schottky-like rectifying junction with a metallic ferromagnet. Although theoretical works have already addressed the performance of this structure by numerical simulations of the spin drift and spin diffusion equations, taking into account various characteristics of the ferromagnet (FM) / semiconductor (SC) interface such as barrier height and boundary roughness in 1D models, correlations with experimental results are scarce. This work aims at achieving spin injection with Ge-based magnetic structures using a rectifying junction in a coplanar architecture. We performed 2D numerical calculations of the spin drift and diffusion process in the direct neighborhood of a junction consisting of a Mn5Ge3 half-metallic ferromagnet acting as the injecting contact and an n-type Ge film, forming 3- and 4-terminal devices. Our results show that geometrical effects play a major role on the spin injection efficiency. Moreover, the simulations emphasize the asymmetry of spin accumulation at the FM/SC interface as well as a strong effect of the depletion layer caused by the Schottky contact junction. [less ▲]

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See detailRédiger en langue étrangère à l’université : des représentations à l’évaluation des pratiques scripturales
Meunier, Deborah ULiege

Conference (2017, November 09)

Le champ des littéracies universitaires (Blaser et Pollet, 2010 ; Delcambre et Lahanier-Reuter, 2010) prend pour objet d’étude les normes génériques, textuelles, pragmatiques des écrits produits à ... [more ▼]

Le champ des littéracies universitaires (Blaser et Pollet, 2010 ; Delcambre et Lahanier-Reuter, 2010) prend pour objet d’étude les normes génériques, textuelles, pragmatiques des écrits produits à l’université, mais aussi celle des représentations associées aux pratiques de lecture et d’écriture. Au-delà de la maitrise du code linguistique d’enseignement, les étudiants doivent acquérir des compétences discursives liées aux genres écrits et oraux auxquels ils sont confrontés durant leur cursus (cours magistral, séminaire, exposé, résumé, compte-rendu, rapport, travail de fin d’études,…). Nous verrons quels sont les défis que pose la maitrise des genres de discours universitaires écrits en français pour les étudiants non francophones : comment se fait l’acculturation à une écriture heuristique pour un étudiant qui apprend dans une langue étrangère ? Quelles sont les représentations (explicites ou implicites) des normes génériques activées par les enseignants (par ex. via les consignes) ? Et quelle(s) posture(s) adopter lorsqu’on doit évaluer des productions écrites en langue étrangère quand la langue (française) n’est pas objet d’enseignement ? A partir d’une analyse de discours d’enseignants en Sciences humaines, nous ferons le point sur les représentations et les normes qui régissent les pratiques et les défis actuels du français sur objectifs universitaires, en particulier lorsqu’on est face à des profils d’apprenants plurilingues et mobiles. [less ▲]

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See detailTransport de la charge sableuse dans les rivières caillouteuses de Belgique et du nord de la France grâce aux scories de la sidérurgie ancienne
Houbrechts, Geoffrey ULiege; Gob, Frédéric; Tamisier, Vincent et al

Conference (2017, November 09)

Le transport de la charge sableuse dans les rivières caillouteuse reste à l'heure actuelle relativement mal connu. Avec les techniques habituellement déployées en dynamique fluviale, le principal problème ... [more ▼]

Le transport de la charge sableuse dans les rivières caillouteuse reste à l'heure actuelle relativement mal connu. Avec les techniques habituellement déployées en dynamique fluviale, le principal problème consiste à retrouver après une crue mobilisatrice des éléments sableux marqués et dispersés longitudinalement et verticalement dans le lit des rivières. De plus, les résultats obtenus portent sur des échelles de temps relativement limitées. Nous proposons une approche nouvelle pour quantifier le transport du sable grâce à l’utilisation d’un traceur anthropique, les scories de la sidérurgie ancienne. De grandes quantités de scories sont en effet présentes dans les alluvions sableuses et caillouteuses de nombreux cours d'eau d'Europe. Ces scories sont des déchets produits dans des usines sidérurgiques installées le long des cours d'eau entre le 14e et le 19e siècle. Ces déchets étaient généralement rejetés sur les plaines alluviales, à proximité des rivières, ou directement dans les cours d'eau. Lors des crues, ces éléments ont été emportés en aval et se sont mélangés avec la charge naturelle des rivières (Houbrechts et al., 2011). Grâce aux sources historiques, il est possible de dater de manière relativement précise les périodes d'activité de ces sites sidérurgiques. En conséquence, sur la base de la distance de dispersion des scories et de l'époque de rejets, nous avons déterminé la vitesse d'avancée de la charge en saltation pour plusieurs rivières du massif ardennais, de Normandie et de Haute Marne. Cette analyse a été plus spécifiquement réalisée sur deux fractions granulométriques : entre 0,5 et 1 mm et entre 1,6 et 2,5 mm. Ces données permettent ainsi d’étudier le transport de la charge en saltation dans des rivières naturelles en tenant compte des caractéristiques granulométriques des lits (armurage) sur la mise en mouvement des fractions sableuses. Une attention particulière a par ailleurs été portée sur le rôle des obstacles transversaux sur le transit des sables. Enfin, par rapport aux techniques traditionnelles, l’utilisation des scories a permis d’analyser ces questions sur le temps long (plusieurs siècles), ce qui permet d’intégrer l’évolution historique des lits et de pleinement considérer le caractère très discontinu du transport (difficilement appréhendé lorsqu’on travaille avec le marquage de particules individuelles). [less ▲]

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See detailNeurophysiological techniques for functional quantification
DIVE, Dominique ULiege; GIFFROY, Xavier ULiege; WANG, François-Charles ULiege

Conference (2017, November 09)

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See detailLe corps, le territoire et le temps du sujet borderline
Englebert, Jérôme ULiege

Conference (2017, November 09)

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See detailEvaluation multimodale de patients en état de conscience altérée
Cassol, Helena ULiege; Wolff, Audrey ULiege

Conference (2017, November 09)

Detailed reference viewed: 13 (2 ULiège)
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See detailFrom Gasoline Alley to Walt & Skeezix. Layers of Autobiography in Frank King's Comic Strip Reprints
Crucifix, Benoît ULiege

Conference (2017, November 09)

This paper focuses on Jeet Heer and Chris Ware’s D+Q reprints of Frank King’s original 1920s-1930s newspaper comic strip, suggesting that the paratext of these 21st-century editions provide an ... [more ▼]

This paper focuses on Jeet Heer and Chris Ware’s D+Q reprints of Frank King’s original 1920s-1930s newspaper comic strip, suggesting that the paratext of these 21st-century editions provide an “autobiographical reading” of the comic strip. Heer and Ware thus participate in the retrospective integration of Frank King’s comic strip within the autobiographical paradigm dominating the graphic novel. In doing so, the reprints acknowledge how King adapted to the cultural and commercial constraints of the newspaper strip to produce an indirect form of life-writing. [less ▲]

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See detailValdem Project : From building waste LCA to buildings circular economy
Groslambert, Sylvie ULiege; Roy, Aubin

Conference (2017, November 09)

From resource prospective, building and construction sector is responsible for more than third of global resource consumption, including 12% of the fresh water use and its generation of solid waste is ... [more ▼]

From resource prospective, building and construction sector is responsible for more than third of global resource consumption, including 12% of the fresh water use and its generation of solid waste is estimated to be 40% of the total waste volume. At European level, construction and demolition waste is the largest waste stream representing one third of all waste produced in EU. Therefore the resource efficiency and management is crucial in building construction. A very significant part of the Construction and Demolition Waste (CDW) is not recycled today. Also a very limited part is used as a recycled content in the construction and building products and materials. This lack is mainly due to heterogeneity and dispersion of waste flows decreasing efficiency and economic viability of recycling. To address this issue, VALDEM project (funded by Interreg FWVL European Fund) aims to overcome barriers to increase up-cycling applications. The project focuses its activities in North of France, Flanders and Walloon regions (Belgium), and stands out from usual approaches by its cross-border view of circular economy. VALDEM aims, on one hand, to optimize buildings end of life management by developing new deconstruction, sorting and recycling processes to produce uniform and accessible material flows. On the other hand, the project aims at increasing recycling and generating high quality secondary materials (concrete and other flows) to be used in future buildings within an up cycling prospective. And finally it aims at validating the solutions from technical, scientific, economic and environmental point of view. The Environmental assessment, based on LCA, consists of identifying hotspots and key aspects to prioritize the efforts of different economic actors. As a first step, an LCA meta-analysis is conducted to provide an environmental picture for different potential activities within the scope of the project. As a next step, a comparative LCA is conducted to assess the environmental benefits and impacts of different solutions proposed in the framework of the project in a decision making context, and to limit the impact transfer and to generate the maximum value for all the stakeholders. Finally, results will be transferred to main actors (recycling operators, buildings contractors, product manufacturers …) in the three regions in order to consolidate future key aspects to eco-design a building in light of circular economy. [less ▲]

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See detail“Who Cares for those who Cared? Global Social Protection Arrangements Between Europe and Latin America”.
Vivas Romero, Maria ULiege

Conference (2017, November 09)

Belgium recently experienced an economic and political crisis. This context has reinforced the historical restrictive migratory approach while promoting policies that aim at restraining migration through ... [more ▼]

Belgium recently experienced an economic and political crisis. This context has reinforced the historical restrictive migratory approach while promoting policies that aim at restraining migration through the control of social provisions. In such an environment migrant families are categorized as an intolerable burden for the state (Lafleur and Stanek forthcoming). Evidently, these measures affected migrant family’s access to health-care, education, pension schemes and increased their unemployment rates (Castanheira et al. 2014; Pignal 2012). Nevertheless, it also drove them to diversify their resources to access social protection while negotiating them in sending, receiving and in-between countries. This paper tackles this last argument and explores the post-crisis strategies Peruvian and Colombian migrant families use to access global social protection arrangements while negotiating their access to informal and formal resources in a variety of countries in Europe and Latin America. Nonetheless, it also depicts emerging or transforming inequalities in their strategies. Global Social Protection arrangements are defined as strategies that migrants learn to put together through their life course to cope with social risks in areas such as: health-, long-term care, pensions or unemployment. Such strategies combine rights based in public welfare policies as well as market-family and community based practices. An intersectional lens (Anthias 2001) is used to explore how Andean transnational families’ ethnic, class, gender, generational positioning’s affects their strategies. The empirical data use draws from a multi-sited ethnography conducted with 15 Andean Transnational family networks over the past two years. [less ▲]

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See detailQuantitative profiling of endogenous polar metabolites from low volumes of blood samples
Kok, Miranda ULiege; Fillet, Marianne ULiege

Conference (2017, November 08)

The etiology of many diseases is not yet completely understood. The involved biological processes might be resolved using a metabolomics approach, because metabolomics provides unique challenging ... [more ▼]

The etiology of many diseases is not yet completely understood. The involved biological processes might be resolved using a metabolomics approach, because metabolomics provides unique challenging opportunities to correlate the metabolome with a physiological or pathophysiological status and provides a vision on the relationships between genes, gene expression, environment and lifestyle. Here, we present the development of two ultra-high performance liquid chromatography (UHPLC) methods coupled to mass spectrometry (MS) for the separation and quantitation of polar metabolites in blood samples. A reversed-phase UHPLC-MS/MS method has been developed to quantify anionic energetic metabolites, whereas hydrophilic interaction chromatography (HILIC)-MS/MS has been used to determine amino acids. Two sample pretreatment procedures have been developed for an optimal recovery of the respective metabolites from whole blood samples. One method involved the precipitation of proteins with organic solvents and acids. In addition, volumetric absorptive microsampling has been used for the sample preparation. Small and accurate quantities of biological fluids (10 or 20 µL) can be collected with this sampling technique, which is of great interest for volume-limited samples or serial collection of samples. The developed methods have been validated and will be applied to determine differences in metabolite concentrations between blood samples from patients and controls. This can lead to a breakthrough in the understanding of diseases and can open new therapeutic perspectives. [less ▲]

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See detailDisplacements and public health in the context of building exposure to risk
Ozer, Pierre ULiege

Conference (2017, November 08)

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See detailModulation of NMDA receptor mediated excitatory synaptic currents in dopamine neurons of the substantia nigra.
Destreel, Geoffrey ULiege; Seutin, Vincent ULiege; Engel, Dominique ULiege

Poster (2017, November 08)

Dopamine (DA) neurons of the substantia nigra pars compacta (SNc) exhibit two main firing modes, spontaneous single action potential (AP) firing and bursting. The amount of DA released by these neurons in ... [more ▼]

Dopamine (DA) neurons of the substantia nigra pars compacta (SNc) exhibit two main firing modes, spontaneous single action potential (AP) firing and bursting. The amount of DA released by these neurons in target areas depends on the presynaptic AP firing pattern and is essential to modulate several aspects of behavior such as the control of movement. Bursting activity is mediated by excitatory afferents and specifically by the activation of NMDA receptors (NMDARs). However, the level of activation of NMDARs at these synapses during spontaneous synaptic activity is unknown. We assessed the occupancy of the glycine binding sites of the NMDAR by testing the effects of coagonists and by blocking the uptake of glycine on spontaneous excitatory postsynaptic currents (sEPSCs) in DA neurons of the SNc. [less ▲]

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See detailActive Healthy Kids Belgium 2016 Report Card on Physical Activity for Children and Youth
Seghers, Jan; Wijtzes, Anne I; De Ridder, Karin A.A. et al

Poster (2017, November 08)

This 2016 Belgium Report Card on Physical Activity for Children and Youth is the first systematic evaluation of physical activity behaviors, related health behaviors, health outcomes, and influences thereon ... [more ▼]

This 2016 Belgium Report Card on Physical Activity for Children and Youth is the first systematic evaluation of physical activity behaviors, related health behaviors, health outcomes, and influences thereon, using the Active Healthy Kids Canada grading framework (Tremblay et al., 2015). A research working group as well as policy experts from both Flanders and Wallonia collaborated to determine the indicators to be graded, data sources to be used, and factors to be taken into account during the grading process. Grades were assigned based on examination of the current data and literature for each indicator against a benchmark or optimal scenario: A (81-100%) = We are succeeding with a large majority of children; B (61 – 80%) = We are succeeding with well over half of children; C (41 – 60%) = We are succeeding with about half of children; D (21 – 40%) = We are succeeding with less than half, but some, children; F (00 – 20%) = We are succeeding with very few children; INC = there is no or insufficient evidence to assign a grade. In addition to an overall grade, an indicator could be assigned a plus sign or minus sign based on the presence or absence, respectively, of substantial social inequalities, according to age, region, gender, or socioeconomic status. Eleven indicators were selected and assigned the following grades: overall physical activity (F+), organized sport participation (C-), active play (C+), active transportation (C-), sedentary behaviors (D-), school (B-), government strategies and investment (C+), and weight status (D). Incomplete grades were assigned to family and peers, community and the built environment, and dietary behaviors due to a lack of nationally representative data. Despite moderately positive social and environmental influences, physical activity levels of Belgian children and youth are low while levels of sedentary behaviors are high. [less ▲]

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See detailPE teachers as promotors of physically educated citizens: Comparison of their representations in Quebec and Wallonia
Cloes, Marc ULiege; Carbonneau, Ulysse; Grenier, Johanne

Poster (2017, November 08)

If physical education (PE) was sport oriented since the 80’s, an international movement underlined a need of change in order to deal more with the society evolution. Since the turn of the new millennium ... [more ▼]

If physical education (PE) was sport oriented since the 80’s, an international movement underlined a need of change in order to deal more with the society evolution. Since the turn of the new millennium, PE has been increasingly linked to the promotion of physically active lifestyles. The implementation of such change of core values differed dramatically from one country to another. For example, in two French speaking regions, Quebec and Wallonia, the educational stakeholders reacted in different ways. As soon as 2001, the Quebec Ministry of Education decided to entrust PE and health education to PE teachers while the Wallonian educational authorities seem to discover today the central role that PE teachers could play in promoting a healthy lifestyle in youth. In this study, we compared Quebec and Wallonian PE teachers’ representations of their role as promotors of an active lifestyle. Six Canadian (3 females) and 11 Wallonian PE teachers (6 females) answered to a semi-structured interview. It was focused on: students’ motivation and self-confidence to engage in regular physical activity; knowledge about the health benefits of an active lifestyle, and self-determination to practice regular physical activity. A content analysis of the verbatim was processed in order to identify the main concepts expressed by the subjects. At the current state of the data analysis, it appears that cultural differences are clearly identified between Canadian and Wallonian PE teachers. The development of a healthy active lifestyle is more predominant among Canadian educators who can draw their experiences in more than 10 years of the Physical and Health Education curriculum while their colleagues from Wallonia are still trying to test new approaches without a strong institutional support. Wallonian teachers could take benefit of their colleagues’ experience in order to facilitate the adoption of news teaching strategies. [less ▲]

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See detailMeasuring children motor skills with MOBAK-1: criteria adaptation and comparison of two scoring systems
Jidovtseff, Boris ULiege; Paulus, Camille ULiege; De Sousa Morgado, Liliane ULiege

in Electronic Abstract book AIESEP 2017 (2017, November 07)

Introduction The MOBAK-1 testing battery has been recently developed with the aim of assessing the locomotion and object-control abilities of first grade children. Previous researches have demonstrated ... [more ▼]

Introduction The MOBAK-1 testing battery has been recently developed with the aim of assessing the locomotion and object-control abilities of first grade children. Previous researches have demonstrated the global interest of this testing battery (1,2). However, a critical analysis of children failures in the tests revealed that some failures were related to the misunderstanding of the instruction or to unsuitable criteria and not to children inability (2). Moreover, the discrimination of the scoring system was also questioned. The aim of the study is to improve criteria in order to avoid the failure that are not related to children ability and to compare the actual dichotomous scoring system with another scoring system taking in consideration the progression of the children. Methods The MOBAK-1 testing battery will be addressed to 30 first grade children. Criteria for each test will be adapted according to previous observations (2) and will include familiarization with the task and additional trial when it is clear that the failure is not due to children ability. All the children will be assessed at the same time with the actual dichotomous scoring system and with an original scoring system that takes the children level of development into account. Results We hypothesized that the adaptation of the criteria will improve the testing battery discrimination. We also expected that the scoring system based on children progression will be more accurate but will be more difficult to be used by unexperienced teachers. Conclusion According to the results of the study, concrete improvements will be addressed to the researchers who work on MOBAK testing battery development. References 1. Herrmann, C., Gerlach, E., & Seelig, H. (2015). Development and validation of a test instrument for the assessment of basic motor competencies in primary school. Measurement in Physical Education and Exercise Science, 19(2), 80-90. 2. Jidovtseff B., Vandeloise V., Cloes M., Morgado L., Mornard M. (2017). Measuring children motor skills with MOBACK-1: descriptive data and critical analysis Book of abstracts. CIAPSE 2017. Finland. [less ▲]

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See detailGeneration of unidirectional composite stochastic volume elements from micro-structural statistical information
Wu, Ling ULiege; Bidaine, Benoit; Major, Zoltan et al

Conference (2017, November 07)

The purpose of this work is to generate Stochastic Volume Element (SVE) of unidirectional composites using statistical information obtained from imaging technique in order to study the effect of the micro ... [more ▼]

The purpose of this work is to generate Stochastic Volume Element (SVE) of unidirectional composites using statistical information obtained from imaging technique in order to study the effect of the micro-structure uncertainty on the meso-scale behavior. When considering a homogenization-based multiscale approach, the material properties are obtained at each integration point of a macro-structure from the resolution of a micro-scale boundary value problem. When the separation of scales holds, the macro-point is viewed at the micro-level as the center of a Representative Volume Element (RVE). However, for composite materials which suffer from a large scatter in their constituent properties and microstructure, the separation of scales does not always hold, in particular at the onset of failure, and structural properties exhibit a scatter. In order to predict this scatter, Stochastic Volume Elements (SVE) [1, 2] of unidirectional fiber composite materials should be built from experimental measurements, see Fig. 1(a). Toward this end, statistical functions of the fibers features such as radius, the closest neighboring distance etc. [3] are extracted from several SEM images to generate statistical functions of the micro-structure. The dependent variables are then represented using the copula framework, allowing generating micro-structures, see Fig. 1(b), using an inclusions additive process. Simulations on the generated SVEs are then used to extract the probabilistic meso-scale stochastic behavior. In the future the extracted behaviors will be used to build a stochastic model of homogenized properties based on Mean-Field-Homogenization in order to predict statistical macro-scale behaviors and in particular the failure onset. References [1] Ostoja-Starzewski, M., Wang, X. Stochastic finite elements as a bridge between random material microstructure and global response. Comput. Meth. in Appl. Mech. and Eng. (1999) 168: 35-49. [2] Lucas, V., Golinval, J.-C., Paquay, S., Nguyen, V.-D., Noels, L., Wu, L. A stochastic computational multiscale approach; Application to MEMS resonators. Comput. Meth. in Appl. Mech. and Eng. (2015) 294, 141-167. [3] Vaughan, T.J., McCarthy C.T. A combined experimentalnumerical approach for generating statistically equivalent fibre distributions for high strength laminated composite materials. Compos. Sci. and Tech. (2010) 70, 291-297. [less ▲]

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See detailPictorial scale of perceived water competences The building of a new tool adapted to the children
Jidovtseff, Boris ULiege; De Sousa Morgado, Liliane ULiege; Sääkslahti, Arja et al

Conference (2017, November 07)

Introduction Researches have demonstrated the interest to develop pictorial instrument for assessing fundamental movement skill perceived competence in young children (1). Perceived competence appears ... [more ▼]

Introduction Researches have demonstrated the interest to develop pictorial instrument for assessing fundamental movement skill perceived competence in young children (1). Perceived competence appears appear at least as important as actual competence as it may more directly affect motivation towards an active behavior (2). For different reasons, it is worth developing such a pictorial instrument for assessing children’s perceived water competencies. With that aim, a collective of researchers have decided to work on the development of such a new tool. Methods The collective of researcher started in 2016 during AIESEP congress in Laramie (USA) and grew up by including additional experts specialized in aquatic skill and/or pictorial scale tools. Videos skype conference and email exchanges were used for communication. Important discussions and decisions concerned the list of aquatic competence skills, the scoring system, the selection of an illustrator and the characteristics of the pictures. In order to build the tool within a reasonable delay, timing with the different actions has been suggested. Results A first list of water competencies has been dressed based on scientific references (3-5). According to these skills, different practical situation have been selected to be included in the pictorial scale. The collective of researcher decided to start with a three level score system including ‘not able’, ‘in progression’ and ‘able’ pictures for each situation. All pictures must be digital in such a way they could be used on paper and/or on computer and android/apple applications. Pictures have to be neutral and to be representative of different cultures and contexts in order to be adapted to all countries and situations. The possibility of having the same image in different cultural contexts is investigated. The different steps in the scale development have been scheduled and will include: content validity, face validity, construct validity, reliability, data collection. Conclusion The development of a pictorial instrument for assessing children perceived water competencies is progressing well and a usable version of the tool should be available by the end of 2017 References 1. Barnett, L. M., Ridgers, N. D., Zask, A., & Salmon, J. (2015). Face validity and reliability of a pictorial instrument for assessing fundamental movement skill perceived competence in young children. Journal of science and medicine in sport, 18(1), 98-102. 2. Barnett, L. M., Morgan, P. J., van Beurden, E., & Beard, J. R. (2008). Perceived sports competence mediates the relationship between childhood motor skill proficiency and adolescent physical activity and fitness: a longitudinal assessment. International journal of behavioral nutrition and physical activity, 5(1), 40. 3. Langendorfer, S. J., & Bruya, L. D. (1995). Aquatic readiness: Developing water competence in young children. Human Kinetics 1. 4. Langendorfer (2015). Changing Learn-to-Swim and Drowning Prevention Using Aquatic Readiness and Water Competence, International Journal of Aquatic Research and Education, 2015, 9, 4-11 5. Quan et al. (2015). Toward Defining Water Competency: An American Red Cross Definition, International Journal of Aquatic Research and Education, 2015, 9, 12-23 [less ▲]

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See detailEcophysiology of elephants to better understand their crop selection: first results of a case study in Monts de Cristal, Gabon
Ngama, Steeve ULiege

Conference (2017, November 07)

Parasites and hormones are one of the best indicators of animal ecophysiology which clarify the role and importance of physiological processes in the ecological relations of species in their natural ... [more ▼]

Parasites and hormones are one of the best indicators of animal ecophysiology which clarify the role and importance of physiological processes in the ecological relations of species in their natural habitat. As damages on crops are often sources of conflict between humans and elephants in elephant home ranges, few data on the relevance of elephant physiology on crop selection exist. For that we investigate elephant ecophysiology to better understand if their parasitism and stress conditions underlie their crops selection. For that we measured parasite loads and stress hormone levels in feces of some elephants eating banana and others eating natural food. We conducted the study during fifteen months covering five different local seasons of the research site in Mont de Cristal, Gabon. Here we report first results from two seasons. We collected 485 samples of elephant dungs and more than 1200 samples of food items eaten by elephants. While stress levels are not correlated to banana selection, the presence of parasites is. Our results show higher parasite loads in dungs of elephants eating banana than in those of elephants eating natural food resources species. Thus elephants may eat banana more as a medicine item than a food resource. But we still need to confirm these results by assessing this trend over seasons and with reproduction hormones. [less ▲]

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See detailDevelopment of an Interferometric Mass Processing Chain for Multitemporal Ground Deformation Measurements
Libert, Ludivine ULiege; De Rauw, Dominique ULiege; d'Oreye, Nicolas

Conference (2017, November 07)

The main goal of the RESIST project is to understand the mechanisms driving volcanic eruptions and landslides in the Kivu region, on the East African Rift. In order to model both volcanic and landslide ... [more ▼]

The main goal of the RESIST project is to understand the mechanisms driving volcanic eruptions and landslides in the Kivu region, on the East African Rift. In order to model both volcanic and landslide processes, it is necessary to measure ground deformations in the region accurately. For this purpose, both ground-based instruments (e.g. GPS network) and spaceborne data (e.g. optical and SAR images) are used. One aspect of the project focuses on Differential SAR Interferometry (DInSAR), which is a technique used to map ground deformations occurring between two SAR images acquired at different times. It is today a well-mastered technique that offers large spatial coverage with a typical temporal sampling of one to several days, depending on the chosen sensor. In the last years, multitemporal approaches based on DInSAR have been developed, like the Small BAseline Subset (SBAS) [1] and Multidimensional Small BAseline Subset (MSBAS) [2] techniques, or the Persistent Scatterers Interferometry (PSI) [3]. In the framework of RESIST, we use MSBAS to perform ground deformations monitoring along time. The Multidimensional Small BAseline Subset (MSBAS) technique produces 2-D time series of ground deformations by integrating data sets of SAR images acquired by different sensors, with different spatial and temporal sampling, resolutions, incidence angles, wavelengths, pass directions and other varying parameters. By combining at least two data sets with overlapping spatial and temporal coverage and an extended range of look angles, the evolution of deformations in the vertical and west-east directions can be computed by the MSBAS approach [2]. The MSBAS software feeds on a large amount of deformation maps, which are produce by DInSAR. Such an amount of data cannot be produced by hand and that is the reason why we developed an automatic interferometric processing chain meant to produce large amounts of products adequate for multitemporal methods like MSBAS. The interferometric processing is supported by the CSL InSAR Suite (CIS) software developed at Centre Spatial de Liège, which presents the advantages to be fully adaptable to the needs of the MSBAS technique and the thematic specificities. Indeed, numerous options (e.g. adaptive filtering, wide swath interferometry) have been added to the CIS software in the framework of the RESIST project. In a first time, we will briefly present the MSBAS approach and its advantages regarding the ground deformation measurements. In the second part of the presentation, we will introduce the mass processing chain step by step and its functionalities. Critical steps of the chain, like the chosen strategy for the interferometric pairs selection, the integration of Sentinel-1 data or the image interpolation approach, will be presented in more details. Finally, preliminary results of an MSBAS processing over the Bukavu area will be presented. REFERENCES: [1] Berardino, P., Fornaro, G., Lanari, R., and Sansosti, E. (2002). A new algorithm for surface deformation monitoring based on small baseline differential SAR interferograms, IEEE Trans. Geosci. Remote Sens., 40, 11, pp. 2375-2383. doi: 10.1109/TGRS.2002.803792. [2] Samsonov, S., and d’Oreye, N. (2012). Multidimensional time series analysis of ground deformation from multiple InSAR data sets applied to Virunga Volcanic Province, Geophysical Journal International, 191, 3, pp. 1095-1108. doi: 10.1111/j.1365-246X.2012.05669.x [3] Ferretti, A., Prati, C., and Rocca, F. (2001). Permanent scatterers in SAR interferometry, IEEE Trans. Geosci. Remote Sens., 39, 1, pp. 8-20. doi: 10.1109/36.898661. [less ▲]

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See detailERα- and dose-dependent effect of estetrol on angiogenesis and tumor growth
Gallez, Anne ULiege; BLACHER, Silvia ULiege; Gérard, Céline et al

Poster (2017, November 07)

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See detailGeneration of open foam RVEs with sharp edges using Distance fields and Level sets
Kilingar, Nanda Gopala ULiege; Noels, Ludovic ULiege; Massart, Thierry Jacques et al

Conference (2017, November 07)

A methodology to generate Representative Volume Elements for open foam cellular materials based on distance and level set functions is explained. The main focus of this work is to properly represent the ... [more ▼]

A methodology to generate Representative Volume Elements for open foam cellular materials based on distance and level set functions is explained. The main focus of this work is to properly represent the geometry of the sharp edges of the foam struts that are resulting from the solidification phase during manufacturing. An approach to generate RVEs for open-cell foams is described in [1], where arbitrary shaped tessellations are produced and specific combination of distance functions are used to generate open foam RVEs. Steep discontinuities in the distance functions derivatives result in the generation of jagged sharp edges, due to the use of discrete level set functions. The procedure to extract geometries from multiple level set functions to reproduce such sharp edges of the struts proposed in [1] has been incorporated in the current work. The individual cells are extracted as inclusion surfaces based on distance functions. The inclusion surfaces are then modified using multiple level set functions, and the sharp edges are computed from the intersection of these inclusions. The resulting geometry can then be meshed using size functions based on curvature and narrowness and a mesh optimization inspired from [2]. The methodology to produce high quality meshes based on [3] will be outlined (Figure 2). The resulting FE models will be then used in simulations to assess the practical applications of these models by comparing with experimental data of physical samples. [less ▲]

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See detailCharacterization and regulation of the intestinal epithelial cell response to colitogenic triggers
El Abbas, Sophie ULiege; Beguin, C; Schyns, Joey ULiege et al

in Proceedings of Annual meeting of the French Society for Immunology (SFI) (2017, November 07)

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See detailA stochastic 3-scale method to predict the thermo-elastic behaviors of polycrystalline structures
Wu, Ling ULiege; Lucas, Vincent; Golinval, Jean-Claude ULiege et al

Conference (2017, November 07)

The purpose of this work is to upscale material uncertainties in the context of thermo-elastic response of polycrystalline structures. The probabilistic behavior of micro-resonators made of ... [more ▼]

The purpose of this work is to upscale material uncertainties in the context of thermo-elastic response of polycrystalline structures. The probabilistic behavior of micro-resonators made of polycrystalline materials is evaluated using a stochastic multi-scale approach defined using the following methodology. 1. Stochastic volume elements (SVEs) [1] are defined from Voronoi tessellations using experimental measurements of the grain size, orientation, and surface roughness [2]; 2. Mesoscopic apparent thermo-elastic properties such as elasticity tensor, thermal conductivity tensor, and thermal dilatation tensor are extracted using a coupled homogenization theory [3, 4] applied on the SVE realizations; 3. A stochastic model of the homogenized properties extracted from Voronoi tessellations using a moving window technique is then constructed in order to be able to generate spatially correlated meso-scale random fields; 4. These meso-scale random fields are then used as input for stochastic finite element simulations. As a result, the probabilistic distribution of micro-resonator properties can be extracted. The applications are two-fold: 1. A stochastic thermo-elastic homogenization, see Fig. 1(a), is coupled to thermoelastic 3D models of the micro-resonator in order to extract the probabilistic distribution of the quality factor of micro-resonators [5]; 2. A stochastic second-order mechanical homogenization, see Fig. 1(b), is coupled to a plate model of the micro-resonator in order to extract the effect of the uncertainties related to the surface roughness of the polycrystalline structures [2]. References [1] Ostoja-Starzewski, M., Wang, X. Stochastic finite elements as a bridge between random material microstructure and global response. Comput. Meth. in Appl. Mech. and Eng. (1999) 168: 35-49. [2] Lucas, V., Golinval, J.-C., Voicu, R., Danila, M., Gravila, R., Muller, R., Dinescu, A., Noels, L., Wu, L. Propagation of material and surface profile uncertainties on MEMS micro-resonators using a stochastic second-order computational multi-scale approach. Int. J. for Num. Meth. in Eng. (2017). [3] Temizer, I., Wriggers, P. Homogenization in finite thermoelasticity.J. of the Mech. and Phys. of Sol. (2011) 59, 344-372. [4] Nguyen, V. D., Wu, L., Noels, L. Unified treatment of boundary conditions and efficient algorithms for estimating tangent operators of the homogenized behavior in the computational homogenization method. Computat. Mech. (2017) 59, 483-505. [5] Wu, L., Lucas, V., Nguyen, V. D., Golinval, J.-C., Paquay, S., Noels, L. A Stochastic Multi-Scale Approach for the Modeling of Thermo-Elastic Damping in Micro-Resonators. Comput. Meth. in Appl. Mech. and Eng. (2016) 310, 802-839. [less ▲]

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See detailFonction publique et ressources humaines. Communes de la Province de Luxembourg
Grandjean, Geoffrey ULiege

Conference (2017, November 06)

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See detailCoding of papers submitted to the 14th Congresso Brasileiro de Medicina de Família e Comunidade
Augusto, Daniel; Rebolho, Ricardo; Jamoulle, Marc ULiege et al

Conference (2017, November 05)

Introduction: The intention of codifying the 14th CBMFC's work with the use of 3CGP (Core Concept Classification in General Practice Family Medicine) appeared during the 21st WONCA World Conference of ... [more ▼]

Introduction: The intention of codifying the 14th CBMFC's work with the use of 3CGP (Core Concept Classification in General Practice Family Medicine) appeared during the 21st WONCA World Conference of Family Physicians, when members of the organizing committee of the 14th CBMFC were able to participate in an activity given by Dr Marc Jamoulle on the subject and realized how important it could be to use 3CGP. It consists of using the International Classification of Primary Care (CIAP-2) and the Q-Codes to classify the contents of abstracts submitted to the congress. CBMFCs are large events, which usually receive a substantial number of abstracts. The experience of using 3CGP in an event of this magnitude can have a great impact for the development of the specialty in the country, besides having a pioneering character, contributing for 3CGP to become an international standard in the congresses of family and community medicine. Objectives: Assist the author in the choice of theme; Teaching how to index; Contribute to updating the Q Codes; Manage the congress; Contribute in the management of knowledge in family and community medicine. Method: This is an action research experiment that will consist of the coding of all abstracts submitted to the 14th CBMFC with the use of 3CGP. Authors will be introduced to the classification system by means of an introductory text and should submit their work on the event site using a system that already allows them to perform the encoding of the abstract. The data obtained in this process will be evaluated by members of the organizing committee of the 14th CBMFC, who will be in charge of synthesizing it. [less ▲]

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See detailOstéochondrites
Kaux, Jean-François ULiege; Maillard, Bérengère

Conference (2017, November 04)

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See detailComparison of faecal microbiota of horses suffering from atypical myopathy and healthy co-grazers
Cerri, Simona ULiege; Taminiau, Bernard ULiege; Votion, Dominique ULiege et al

Poster (2017, November 02)

Objectives: To characterize faecal microbiota of horses with atypical myopathy (AM) compared with healthy co-grazers (HcG). Methods: Fresh faecal samples were obtained from 6 horses (1 stallion, 3 ... [more ▼]

Objectives: To characterize faecal microbiota of horses with atypical myopathy (AM) compared with healthy co-grazers (HcG). Methods: Fresh faecal samples were obtained from 6 horses (1 stallion, 3 geldings and 2 females; mean age of 11.810 years) with confirmed AM and 6 HcG (4 geldings and 2 females; mean age of 13.68 years) during autumn-2016 and spring-2017 AM outbreaks in Belgium. Bacterial taxonomy profiling obtained by 16S amplicon sequencing of faeces was used to identify differentially distributed bacterial taxa between AM and HcG. Results were statistically compared using Welch's t-test with STAMP software. Results: A total of 90,407 sequences were analysed and clustered to 8,066 operational taxonomic units. Bacterial populations were distributed between 17 phylas, although 20% of sequences could not be attributed to an existing phylum. Horses with AM harboured a significantly higher relative abundance of Ruminococcaeae family with a significantly lower Lachnospiraceae when compared to HcG. Discussion: AM is caused by hypoglycin A intoxication, but only a part of horses pasturing in the same toxic environment develops the pathology, suggesting that there may be protective factors at the horse level. The results of this study show significant differences in faecal microbiota between AM cases and HcG, which could suggest that microbiota could play a role in the development or prevention of clinical disease. Conclusions: Results demonstrate that microbiota of AM affected horses is significantly different compared to HcG. Significance: Microbiome could influence the development of AM, but this role deserves further investigation. [less ▲]

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See detailRaman Chemical Imaging in Kidney Stone Analysis
Castiglione, Vincent ULiege; Sacre, Pierre-Yves ULiege; CAVALIER, Etienne ULiege et al

Poster (2017, November 02)

Background: The structure of kidney stones might provide clinical useful information in addition to the stone composition. The Raman chemical imaging (RCI) is a new technology used for the production of ... [more ▼]

Background: The structure of kidney stones might provide clinical useful information in addition to the stone composition. The Raman chemical imaging (RCI) is a new technology used for the production of two-dimensions maps of the constituents' distribution in samples. We aimed at determining the use of RCI in urinary stone analysis. Methods: Twelve calculi were analyzed by RCI using a confocal Raman microspectrophotometer. They were selected according to their heterogeneous composition and morphology. Prior to the analysis, samples were sliced and milled in order to detect the nucleus of the stones and having a smooth surface. RCI was performed on the whole section of stones. Once acquired, the data were baseline corrected and analyzed by MCR-ALS. Results were then compared to the spectra obtained by Fourier Transform Infrared spectroscopy, the gold standard method for the determination of urolithiasis composition. Results: RCI succeeded in identifying all the chemical components contained in each sample, including monohydrate and dihydrate calcium oxalate, anhydrous and dihydrate uric acid, apatite, struvite, brushite, whitlockite and ammonium urate. However, proteins couldn't be detected because of the huge autofluorescence background and the small concentration of these poor Raman scatterers. Carbapatite and calcium oxalate were correctly detected even when they represented less than 5 percent of the whole stones, allowing the detection of very small structures like Randall's plaques. Moreover, RCI provided the distribution of components within the stones. The nuclei were accurately identified, as well as thin layers of other components. Conversion of dihydrate to monohydrate calcium oxalate was correctly observed in the center of one sample. Conclusion: RCI showed a good accuracy in comparison with infrared spectroscopy in identifying components of kidney stones. In addition, RCI is nondestructive enabling the storage of samples. This analysis was also useful in determining the organization of components within stones, which help locating constituents in low quantity, such as nuclei. However, this analysis is time-consuming, which makes it more suitable for research studies rather than routine analysis. [less ▲]

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See detailThe supergiant O + O binary system HD 166734: a new study
Gosset, Eric ULiege; Mahy, Laurent ULiege; Damerdji, Yassine ULiege et al

in The Lives and Death-Throes of Massive Stars (2017, November 01)

We present here a modern study of the radial velocity curve and of the photometric light curve of the very interesting supergiant O7.5If + O9I(f) binary system HD 166734. The physical parameters of the ... [more ▼]

We present here a modern study of the radial velocity curve and of the photometric light curve of the very interesting supergiant O7.5If + O9I(f) binary system HD 166734. The physical parameters of the stars and the orbital parameters are carefully determined. We also perform the analysis of the observed X-ray light curve of this colliding-wind binary. [less ▲]

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See detailUp and downs of a magnetic oblique rotator viewed at high resolution
Nazé, Yaël ULiege; Zhekov, S. A.; Ud-Doula, A.

in The Lives and Death-Throes of Massive Stars (2017, November 01)

In 2006, the Of?p star HD191612 became the second O-star where a magnetic field was discovered. It provided a benchmark to understand the Of?p phenomenon as a whole. Ten years later, an X-ray monitoring ... [more ▼]

In 2006, the Of?p star HD191612 became the second O-star where a magnetic field was discovered. It provided a benchmark to understand the Of?p phenomenon as a whole. Ten years later, an X-ray monitoring performed at high-resolution reveals the behaviour of the hottest magnetospheric plasma: it is located at ~ 2R [SUB]⊙[/SUB], hot but not extreme (log(T) ~ 7), producing unshifted lines, and displaying a very repetitive variability. A direct comparison with simulations yields an overall good agreement, with only a few further improvements needed. [less ▲]

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See detailInvestigating the Magnetospheres of Rapidly Rotating B-type Stars
Fletcher, C. L.; Petit, V.; Nazé, Yaël ULiege et al

in The Lives and Death-Throes of Massive Stars (2017, November 01)

Recent spectropolarimetric surveys of bright, hot stars have found that ~10% of OB-type stars contain strong (mostly dipolar) surface magnetic fields (~kG). The prominent paradigm describing the ... [more ▼]

Recent spectropolarimetric surveys of bright, hot stars have found that ~10% of OB-type stars contain strong (mostly dipolar) surface magnetic fields (~kG). The prominent paradigm describing the interaction between the stellar winds and the surface magnetic field is the magnetically confined wind shock (MCWS) model. In this model, the stellar wind plasma is forced to move along the closed field loops of the magnetic field, colliding at the magnetic equator, and creating a shock. As the shocked material cools radiatively it will emit X-rays. Therefore, X-ray spectroscopy is a key tool in detecting and characterizing the hot wind material confined by the magnetic fields of these stars. Some B-type stars are found to have very short rotational periods. The effects of the rapid rotation on the X-ray production within the magnetosphere have yet to be explored in detail. The added centrifugal force due to rapid rotation is predicted to cause faster wind outflows along the field lines, leading to higher shock temperatures and harder X-rays. However, this is not observed in all rapidly rotating magnetic B-type stars. In order to address this from a theoretical point of view, we use the X-ray Analytical Dynamical Magnetosphere (XADM) model, originally developed for slow rotators, with an implementation of new rapid rotational physics. Using X-ray spectroscopy from ESA's XMM-Newton space telescope, we observed 5 rapidly rotating B-types stars to add to the previous list of observations. Comparing the observed X-ray luminosity and hardness ratio to that predicted by the XADM allows us to determine the role the added centrifugal force plays in the magnetospheric X-ray emission of these stars. [less ▲]

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See detailX-rays from colliding winds in massive binaries
Nazé, Yaël ULiege; Rauw, Grégor ULiege

in The Lives and Death-Throes of Massive Stars (2017, November 01)

In a massive binary, the strong shock between the stellar winds may lead to the generation of bright X-ray emission. While this phenomenon was detected decades ago, the detailed study of this emission was ... [more ▼]

In a massive binary, the strong shock between the stellar winds may lead to the generation of bright X-ray emission. While this phenomenon was detected decades ago, the detailed study of this emission was only made possible by the current generation of X-ray observatories. Through dedicated monitoring and observations at high resolution, unprecedented information was revealed, putting strong constraints on the amount and structure of stellar mass-loss. [less ▲]

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See detailEssay of Siganus sutor aquaculture in Madagascar: for promising alternative activity for traditional fishermen
Ravelohasina, Helga; Rasolofonirina, R.; Mahafina, J. et al

Poster (2017, November)

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See detailInfluence de la géométrie du quadrant amont et comportement hydraulique sous forte charge des seuils profilés standard
Erpicum, Sébastien ULiege; Pirotton, Michel ULiege; Blancher, Benoit et al

in Loudière, Daniel (Ed.) Hydraulique des barrages et des digues (2017, November)

In order to study the variation of the hydraulic characteristics of ogee-crested weirs for upstream heads higher than the design head, several profiles have been tested on an experimental facility ... [more ▼]

In order to study the variation of the hydraulic characteristics of ogee-crested weirs for upstream heads higher than the design head, several profiles have been tested on an experimental facility specifically designed and instrumented. These profiles have been defined regarding the real profiles of spillways of dams operated by EDF as well as the most used geometry of the literature. The experimental tests have been supplemented by numerical modeling, whose results were found to be very similar. The analysis shows that the discharge coefficient increases with the upstream head until head ratios around 5.5. This evolution follows very well the power equations from the literature. For higher head ratios, the discharge coefficient abruptly decreases from a value around 0.6 to a value around 0.55. This decrease corresponds to the apparition between the main flow and the weir of a low velocity area (the lower nappe does no more correspond to the weir profile). The analysis also shows a significant reduction of the discharge coefficient (around 10%) if the upstream quadrant design head is higher than 2 times the design head of the downstream quadrant. On the contrary, no modification of the discharge coefficient is measured if the upstream quadrant design head is smaller than the downstream quadrant one. [less ▲]

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See detailENTOFÔR project -From waste to resource
Lecrenier, Marie-Caroline ULiege; Fumière, Olivier; Berntssen, M.H.G. et al

Poster (2017, November)

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See detailRecent Adavances in the Analytical Chemistry of Cadaveric Decomposition
Focant, Jean-François ULiege; Dubois, Lena ULiege; Perrault, Katelynn ULiege et al

in Journal of Integrated Omics (2017, November)

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Peer Reviewed
See detailBarrage d’Aubusson d’Auvergne (63) Mise aux normes d’un évacuateur de crues de type seuil latéral double
Routtier; Erpicum, Sébastien ULiege; Pirotton, Michel ULiege

in Loudière, Daniel (Ed.) Hydraulique des barrages et des digues (2017, November)

A scale model of the double side weir spillway of Aubusson d’Auvergne dam has been built and operated with a 1:20 scale factor and Froude similitude. The model enabled designing and optimizing, in ... [more ▼]

A scale model of the double side weir spillway of Aubusson d’Auvergne dam has been built and operated with a 1:20 scale factor and Froude similitude. The model enabled designing and optimizing, in concertation with the Client, a modified geometry of the structures meeting updated discharge capacity requirements. The modified geometry includes a fish ladder within the limits of the secondary channel. It implies modifications of the secondary channel cross section and longitudinal profile, the building of a side wall along the right bank and of a downstream ski jump with a deflector as well as a partial lowering of the side wall between the main and the secondary channels on its downstream part in order to optimize the use of the existing ski jump. From the designer point of view, the use of a hydraulic model enables, for a structure with a complex and non-conventional geometry, to clearly identify its hydraulic limitations and the solutions to be analyzed in order to mitigate them and thus fulfill the new design criteria. It would probably not have been possible to define the proposed solution without the use of a physical model as it is closely related to the hydraulic specificities of the studied structure. Thus, even in the case of small dams, hydraulic experimental modeling may improve the design, making it safer, better optimized and then decrease the project overall costs. [less ▲]

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