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See detailPremiers jalons pour une histoire du plagiat à l’Université de Liège : le cas « de Reiffenberg » (1836)
Adam, Renaud ULg

Conference (2017, February 09)

Membre d’une ancienne famille noble d’origine allemande, le baron Frédéric de Reiffenberg (1795-1850) s’est distingué dans l’histoire de Belgique pour avoir été le premier à occuper le poste de ... [more ▼]

Membre d’une ancienne famille noble d’origine allemande, le baron Frédéric de Reiffenberg (1795-1850) s’est distingué dans l’histoire de Belgique pour avoir été le premier à occuper le poste de conservateur de la Bibliothèque royale de Belgique, fondée en 1837. S’il doit notamment ce poste à l’appui qu’il reçut d’amis haut placé, il convient de rappeler que la nomination à la direction de cette institution fut pour lui une belle opportunité pour quitter Liège et, plus spécifiquement, la charge de professeur d’histoire du Moyen Âge qu’il occupait à l’Université depuis le 6 décembre 1835. En effet, au cours de l’année 1836, son parcours professionnelle fut entaché d’un scandale sans précédent qui le contraint à démissionner : une accusation de plagiat formulée par l’un de ses éminents collègues, Edouard de Lavalleye (1811-1869). La présente communication sera l’occasion de revenir sur cette affaire et son traitement médiatique. [less ▲]

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See detailLa "Vigna Manzi" à Garaguso (Basilicate), un nouveau projet de recherche archéologique de l'Université de Liège
Cuvelier, Graham ULg

Conference (2017, February 08)

En 1916, l’archéologue Vittorio di Cicco entreprenait des fouilles sur le site de la « Vigna Manzi », à Garaguso, en Basilicate. Il y découvrit les vestiges d’un temple qui contenait encore une partie de ... [more ▼]

En 1916, l’archéologue Vittorio di Cicco entreprenait des fouilles sur le site de la « Vigna Manzi », à Garaguso, en Basilicate. Il y découvrit les vestiges d’un temple qui contenait encore une partie de son mobilier et différentes offrandes dont la statuette en marbre d’une déesse trônante accompagnée d’un tempietto. Cette découverte ramenait à la lumière un site de premier ordre pour l’étude des relations qu’entretenaient, dans ces territoires d’Italie méridionale, les populations indigènes et les Grecs des cités de Grande Grèce. Dans le courant du XXe siècle, d’autres fouilles se sont succédé dans le sanctuaire de la « Vigna Manzi » – sans grand résultat. Durant l’été 2008, l’archéologue Jean-Marc Moret a cherché à identifier l’emplacement de la fouille de Vittorio di Cicco. Ce sondage lui a permis de retrouver d’autres structures monumentales augurant une découverte d’envergure. La publication de cette entreprise a ensuite été confiée à Thomas Morard, professeur à l’Université de Liège. Dans cette perspective, une campagne de documentation a été menée durant l’automne 2016. S’en suivra la reprise de l’enquête de terrain, un nouveau projet archéologique pour l’Université de Liège [less ▲]

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See detailTraduction et retraduction françaises de Conversación en La Catedral: Étude des paratextes
Belleflamme, Clémence ULg

Conference (2017, February 08)

Étude des paratextes des traductions de Conversación en la Catedral, toutes deux publiées chez Gallimard. La première, intitulée Conversation à « La Cathédrale » (1973), est l'œuvre de Sylvie Léger et ... [more ▼]

Étude des paratextes des traductions de Conversación en la Catedral, toutes deux publiées chez Gallimard. La première, intitulée Conversation à « La Cathédrale » (1973), est l'œuvre de Sylvie Léger et Bernard Sesé ; la deuxième, Conversation à La Catedral (2015), est signée Albert Bensoussan et Anne-Marie Casès. Notre analyse porte tant sur l'« épitexte » — en particulier, sur les essais d'Albert Bensoussan à propos son travail de traducteur — que sur le « péritexte » (Genette). Ces éléments fournissent en effet de précieuses informations, non seulement pour déterminer la stratégie globale adoptée par les traducteurs par rapport au texte source, mais aussi pour observer l'évolution des « normes de traduction » (Toury) à l'œuvre dans chacune des versions françaises. Les notes du traducteur, notamment, soulèvent les questions de l'implicite et de l'explicite, des connaissances supposées du lecteur cible et de la visibilité du traducteur. [less ▲]

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See detailLe latin et le grec de Michel Dubuisson : quelques réflexions sur une œuvre consacrée au bilinguisme dans l’Antiquité gréco-romaine
Ioannidopoulos, Grégory ULg

Conference (2017, February 08)

Dans son ouvrage bien connu consacré au « Latin de Polybe », M. Dubuisson s’efforça de relever de façon exhaustive les traits de langue qui trahissaient l’influence du latin chez l’historien grec. Mais au ... [more ▼]

Dans son ouvrage bien connu consacré au « Latin de Polybe », M. Dubuisson s’efforça de relever de façon exhaustive les traits de langue qui trahissaient l’influence du latin chez l’historien grec. Mais au-delà, il s’agissait également de tirer toutes les conséquences historiques des conclusions tirées de l’analyse philologique, afin de mieux comprendre l’œuvre de Polybe. M. Dubuisson fut ainsi l’un des promoteurs d’une approche plus qualitative du bilinguisme gréco-latin, approche qu’il élargit ensuite à d’autres champs d’étude. Ce faisant, il contribua à l’affinement de nos connaissances sur les rapports que Rome entretenait avec la Grèce et sa langue, et vice-versa. Et sa démarche fut féconde, tant à l’Université de Liège, où elle s’enracinait dans une tradition solide, qu’à l’extérieur. [less ▲]

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See detailReproduction control as management strategy for local overpopulation of primates in tropical human-dominated habitats: a review
Brotcorne, Fany ULg; Wandia, Nengah; Poncin, Pascal ULg et al

Conference (2017, February 08)

Today, anthropogenic pressures are posing major challenges to Asian primates, forced either to adapt ecologically and behaviourally to the human massive encroachment into natural habitats, or to disappear ... [more ▼]

Today, anthropogenic pressures are posing major challenges to Asian primates, forced either to adapt ecologically and behaviourally to the human massive encroachment into natural habitats, or to disappear. Species ability to survive in human-modified habitats greatly varies, with generalist species, such as Cercopithecines, being more likely to thrive. Several macaque species in particular proliferate in situations of commensal association with humans, which leads sometimes to local overpopulation. High density of primates, resulting from the combined effect of population spatial compression and positive demographics, systematically induces conflicts with humans over crop-raiding and nuisance issues. Different management strategies have been deployed these last decades, going from culling or trapping programmes to sterilization campaigns. Sterilization is an ethical and flourishing solution to mitigate the human-macaque conflict by limiting the population expansion, but very few empirical data are available about their efficiency and potential side effects. We propose here to review various macaque sterilization programmes conducted in Asia, highlighting the pros and cons as well as the short- and long-term effects. As a study case, we will present data on population dynamics and side behavioural effects, as the base for an ongoing sterilization programme in a population of long-tailed macaques (M. fascicularis) in Bali (Indonesia). This population has experienced a tenfold increase over the last 30 years. Vasectomy undergone by several males in a former approach was not efficient to limit births. With others, we argue that macaque’s reproductive profile requires female sterilization. The goal here is to stimulate discussion over management of forced coexistence scenarios between human and primates, since this phenomenon is an integrative part of conservation in this rapidly changing world. [less ▲]

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See detailIngénieries de formation innovantes - quelles place et fonctions pour NeopassSup ?
Poumay, Marianne ULg

Conference (2017, February 08)

Dans le contexte de l'enseignement supérieur et à l'occasion du lancement de la plateforme NéopassSup, cette communication abordait l'intérêt pédagogique d'un tel outil au service du développement ... [more ▼]

Dans le contexte de l'enseignement supérieur et à l'occasion du lancement de la plateforme NéopassSup, cette communication abordait l'intérêt pédagogique d'un tel outil au service du développement professionnel des enseignants du supérieur. Elle imaginait les usages possibles de l'outil, sur la base d'activités déjà en cours. Elle anticipait ensuite les facteurs de succès de ces usages et se clôturait sur quelques réflexions, soulignant notamment l'importance de l'accompagnement des enseignants dans ces démarches de formation et de développement professionnel. [less ▲]

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See detailPour une histoire globale des Sciences humaines à l’Université de Liège
Genin, Vincent ULg

Conference (2017, February 08)

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See detailRestauration de papyrus et techniques d'imagerie au CEDOPAL
Carlig, Nathan ULg

Conference (2017, February 08)

Si le Centre de documentation de papyrologie littéraire (CEDOPAL) de l’Université de Liège est propriétaire, depuis 1954, d’une collection de vingt papyrus, dix-neuf grecs et un copte, datés du Ier au ... [more ▼]

Si le Centre de documentation de papyrologie littéraire (CEDOPAL) de l’Université de Liège est propriétaire, depuis 1954, d’une collection de vingt papyrus, dix-neuf grecs et un copte, datés du Ier au VIIe siècle, il est également dépositaire d’une collection privée liégeoise de papyrus grecs, coptes et démotiques, actuellement en cours de restauration. Après avoir présenté le papyrus comme support d’écriture et ses caractéristiques, nous détaillerons les techniques de restauration et d’imagerie mises en œuvre lors de la restauration de la collection de papyrus du CEDOPAL et de celle de la collection privée et nous mettrons en avant les résultats obtenus et les perspectives d’analyses futures. [less ▲]

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See detailLe Projet Ramsès. Explorer la langue des pharaons au XXIe siècle
Motte, Aurore ULg; Polis, Stéphane ULg

Conference (2017, February 08)

En nous appuyant sur un historique de la chaire d’égyptologie à l’ULg (depuis sa création en 1902), nous montrons comment le Projet Ramsès est venu s’inscrire au cœur des projets de recherche du service ... [more ▼]

En nous appuyant sur un historique de la chaire d’égyptologie à l’ULg (depuis sa création en 1902), nous montrons comment le Projet Ramsès est venu s’inscrire au cœur des projets de recherche du service d’égyptologie à partir de 2006. La présentation s’attache ensuite à en présenter les derniers développements et à illustrer le caractère novateur de ce projet, tant du point de vue de l’égyptologie et de la linguistique de corpus, que du point de vue — plus large — des humanités numériques. Nous décrirons enfin le réseau de recherche européen dont il participe aujourd’hui, impliquant des collaborations suivies avec différents projets d’ampleur. [less ▲]

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See detailPassive (re)translations and active power struggles in "Book of Longing" (Leonard Cohen)
Mus, Francis ULg

Conference (2017, February 07)

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See detailLogging impact on biodiversity in Central Africa
Doucet, Jean-Louis ULg

Conference (2017, February 07)

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See detailThe prosumers and the grid
Gautier, Axel ULg; Jacqmin, Julien ULg; poudou, jean-christophe

Conference (2017, February 07)

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See detailQuantification of natural estrogens in aqueous matrices as pyridine-3-sulfonyl derivatives by UHPLC-ESI-MS/MS
Glineur, Alex ULg; Ronkart, Sébastien; Nott, Kathérine et al

Conference (2017, February 07)

Natural estrogens (estrone: E1, 17-β-estradiol : E2, estriol : E3) and synthetic estrogen (17-α-ethinylestradiol: EE2) are powerful endocrine disruptors. They may have deleterious effects on aquatic ... [more ▼]

Natural estrogens (estrone: E1, 17-β-estradiol : E2, estriol : E3) and synthetic estrogen (17-α-ethinylestradiol: EE2) are powerful endocrine disruptors. They may have deleterious effects on aquatic wildlife and also humans even at extremely low concentrations. For this reason, these molecules have been included in a watch list from the European Commission regarding emerging aquatic pollutants. The maximum detection limits are set at 0.035 and 0.40 ng/L for EE2 and E1, E2 respectively. Reaching such low levels of concentration of estrogenic compounds is a challenge, even using state-of-the-art analytical methods. In this study, we developed a UHPLC-ESI-MS/MS method allowing the quantification of E1, E2, E3 and EE2 residues in aqueous matrices. Studies commonly used ESI in negative mode albeit the poor ionization efficiency of native estrogenic compounds in this mode. In this study, the molecules were derivatised using a sulfonyl chloride reagent (pyridine-3-sulfonyl, P-3-S). The resulting response in the positive mode was significantly enhanced. Similarly to other dansyl derivatives, the product ion spectra of the P-3-S derivatives indicate ions originating from the derivatization reagent moiety. Moreover, several other ions were included in the product ion spectra of the P-3-S derivatives. Their specificity was assessed by a qualitative approach implying the analysis of different types of water samples (groundwater, surface water). Some product ions were found to be noticeably better for quantification and confirmation of the analytes. The developed analytical method was validated according to the NF T90-210 norm which is suitable to assess the performances of a method in the water quality field. The limits of quantification were 0.04, 0.05, 0.10 and 0.02 ng/L in groundwater and 0.89, 0.79,4.42 and 0.29 ng/L in surface water for E1, E2, E3 and EE2 respectively. [less ▲]

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See detailDesign optimization of Rankine cycle systems for waste heat recovery from passenger car engines
Lemort, Vincent ULg; Legros, Arnaud; Dumont, Olivier ULg et al

Conference (2017, February 07)

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See detailHydraulic and wood traits of two congeneric tropical tree species in their core habitat
Gorel, Anaïs ULg; Steppe, kathy; Beeckman, Hans et al

Conference (2017, February 06)

Background: Strong niche partitioning across rainfall gradients has been identified for several tropical tree genera. The link between hydraulic and wood anatomical traits, associated with drought ... [more ▼]

Background: Strong niche partitioning across rainfall gradients has been identified for several tropical tree genera. The link between hydraulic and wood anatomical traits, associated with drought tolerance, however remains to be explored, in order to identify the mechanisms shaping the range limits of tropical tree species. Aim: In this study, we aimed to identify the differences in hydraulic and wood traits between two congeneric tree species with contrasting distributions in moist and wet tropical forests. Location: Central African moist and wet forests Methods: In the core habitat of Erythrophleum ivorense (wet forest) and of E. suaveolens (moist), we collected branches to construct vulnerability curves and measure hydraulic capacitance, and both stem and branch wood samples to link the hydraulic traits to wood anatomy. Major results: E. suaveolens, which is characteristic of drier forests, is clearly more resistant to cavitation than E. ivorense, and also possess a greater hydraulic capacitance (i.e. the capacity that species have to mitigate periods of water storage by using internally stored water). In agreement with this great drought tolerance for E. suaveolens, wood anatomy revealed a high number of small vessels associated with small intervessel pits, features minimizing cavitation risk but also reducing water transport. Main conclusions: Drought tolerance, as indicated by both hydraulic and wood traits, strongly differed between the closely related species and explained their contrasting distribution, and affinity for moist (E. ivorense) and wet (E. suaveolens) forests. However, phenotypic plasticity in hydraulic and wood traits remained to be addressed to examine the extent of water use differences between the two species. [less ▲]

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See detailHow tree architecture varies across coexisting tropical tree species and relates to functional traits?
Loubota Panzou, Grâce Jopaul ULg; Ligot, Gauthier ULg; Loumeto, Jean-Joël et al

Conference (2017, February 06)

Architecture refers to the overall shape of a tree and the spatial position of its components. Tree height determines the position in the forest canopy and access to light, while the amount and spatial ... [more ▼]

Architecture refers to the overall shape of a tree and the spatial position of its components. Tree height determines the position in the forest canopy and access to light, while the amount and spatial distribution of the foliage depend on the depth and the width of the crown. The aim of this study is to understand how tree architecture varies across coexisting tropical tree species and relates to functional traits. Forty five coexisting tree species were sampled in the semi-deciduous forests of Northern Congo. Species were classified according to ecological strategies, specifically regeneration guilds: shade bearers (27 species), non-pioneers light demanding (14 species) and pioneers (4 species). For each species, 14–72 trees (968 trees in total) were measured over a large range of diameter (10–162 cm). At the tree level, we measured the diameter (D in cm), height (H in m), crown radius (Cr in m) and crown depth (Cd in m) and crown exposure index (CEI) was visually estimated. At species level, architectural traits (Dmax, Hmax, Crmax and Cdmax), life history traits (dispersal mode, phenology and guild) and functional traits (wood density and light requirement) were obtained. We investigates the H-D, Cr-D and Cd-D allometric relationships at the tree level using linear mixed models on log-transformed data with species as a random effect on both slope and intercept. We used the multivariate analysis to quantify the relationship between architectural, functional traits and life history traits. Based on AIC, we found that the best linear mixed model was the one with two species random parameters (intercept and slope) for H-D and Cr-D allometries, while the best model for Cd-D allometry was the one with only a random intercept. Thus, our results showed a significant variation in tree allometry between coexisting species. The interspecific variation in H-D allometry was related to light requirement while Cr-D and Cd-D allometries were more related to dispersal mode and wood density, respectively. The confirmed the existence of three ecological strategies (shade bearers, non-pioneers light demanding and pioneers) in tropical forests, specifically in Central Africa. Architectural traits were the main traits that differentiate between ecological strategies. Architectural traits are therefore strong predictors of ecological strategies of coexisting tropical tree species. [less ▲]

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See detailPredicting the future of an endemic endangered Andean bird species with a niche-based-model nested into a dynamic vegetation model
Hambuckers, Alain ULg; Zuniga, Lilian; Dury, Marie ULg et al

Conference (2017, February 05)

The slopes of the Andes are recognized as supporting the highest avian diversity in the world combined with high endemism rate but also more than 20 % of threatened species. Frugivores birds, even rare ... [more ▼]

The slopes of the Andes are recognized as supporting the highest avian diversity in the world combined with high endemism rate but also more than 20 % of threatened species. Frugivores birds, even rare species, are known as major providers of seed dispersal service. In Bolivia, the large Red-fronted Macaw (Ara rubrogenys Lafresnaye, 1847) is one of the 15 endemic species of this country. Its natural habitat is mainly semi-deciduous dry forest but this habitat is most often severely degraded. Climate change is an additional threat over tropical mountain birds and this particular species, since some scenarios suggest warming as high as 7.5°C by 2080 and significant variations in the precipitation regime and available soil water. To infer the future of bird species under warming climate, many authors use niche-based models (NBM), in which they combine effects of climate variables, alone or in combination with other environmental variables. A more elaborated approach consists in also including biotic interactions, notably the availability of particular plant species. While NBM with climate variables are now considered as a standard method to predict plant species distribution under future climate, this approach fails to consider the effect of increasing CO2 concentration in air on plant physiology. Contrariwise, dynamic vegetation models (DVM) are commonly able to reproduce this effect, although the uncertainties on the CO2 are large. This study assesses the potential impact of climate change on the range of A. rubrogenys, by combining within a NBM climate variables, relief and biotic variables, i.e. plant species resource. Plant resource is computed with a DVM and a NBM to compare the methodologies and to evaluate potential effects of CO2 on plant species distribution and indirect impacts on the bird. [less ▲]

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See detailFormes brèves et complexité narrative : l'effet de déjà-vu dans "Southcliffe" (Warp Films, 2013)
Belloi, Livio ULg

Conference (2017, February 02)

Cette communication se penche sur la mini-série anglaise "Southcliffe" (Warp Films, 2013) et s'emploie à dégager en elle divers effets de reprise et de déjà-vu. Ces effets font ensuite l'objet d'une ... [more ▼]

Cette communication se penche sur la mini-série anglaise "Southcliffe" (Warp Films, 2013) et s'emploie à dégager en elle divers effets de reprise et de déjà-vu. Ces effets font ensuite l'objet d'une interrogation touchant à la notion de "complexité narrative" (J. Mittell). [less ▲]

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See detailLocutifs et énoncés non verbaux en ancien français
Mazziotta, Nicolas ULg

Conference (2017, February 02)

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See detailLe droit fiscal à l’épreuve du droit civil: étude positive et prospective de la fiscalisation des revenus de certains acteurs relevant de l’économie sociale
Garroy, Sabine ULg

Conference (2017, February 01)

Présentation en 180 secondes de l'état de la recherche doctorale

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See detailA look at Intact Forest Landscapes and their relevance to Central African forest policy
Haurez, Barbara ULg; Daïnou, Kasso ULg; Vermeulen, Cédric ULg et al

Conference (2017, February)

Tropical forests are important providers of natural resources and ecosystem services but their ecological functions are facing increasing human pressure, linked to economic development. The preservation ... [more ▼]

Tropical forests are important providers of natural resources and ecosystem services but their ecological functions are facing increasing human pressure, linked to economic development. The preservation of tropical forest ecosystems is interrelated with effective land use planning and identification of priority areas for conservation. Initially defined by Greenpeace and the World Resources Institute (WRI) in 2000, Intact Forest Landscapes (IFLs) are large areas of forest minimally impacted by human activities. IFLs were identified by mapping industrial activities, road networks and infrastructure using remote sensing. Since 2014, when IFLs were recognized and adopted by the certification scheme Forest Stewardship Council (FSC), the IFLs have become integrated into forest management policies. In order to trace the history and evaluate the applicability of IFLs for forest management policy in the Central African context, we searched for documents related to the IFL method, and previous similar concepts. The IFL method is simple and cost-effective and enables the monitoring of forest degradation at a global scale. However, the approach mainly considers forest cover and is imprecise at the local scale. For example, hunting, one of the main threats faced by Central African ecosystems, cannot be detected by satellite imagery and is therefore disregarded in IFL identification processes. In contrast, there are other considered anthropogenic activities, such as reduced-impact selective logging, which may be compatible with forest ecosystem conservation. To better tailor the IFL approach to Central African forests, we recommend (i) the consideration of wildlife communities distribution in the analysis of disturbance, (ii) a thorough evaluation of the impacts of different human activities on forest ecosystems, and (iii) the integration of local stakeholders and governments in the design of land management strategies devised to address social, economic and environmental needs. [less ▲]

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See detailInflences of biological findings in the field of architectural theory and formal developments in the french landscape of the 1960
Van Rooyen, Xavier ULg

Conference (2017, February)

In 1960, some architects questionned the « Charte d’Athènes » and its principles. They explored the language of architecture in some Congress and took the name of Team X. During their meeting they tried ... [more ▼]

In 1960, some architects questionned the « Charte d’Athènes » and its principles. They explored the language of architecture in some Congress and took the name of Team X. During their meeting they tried to take into account the potential of different finding in sciences. The architects of the Team X group who intervened in France where mostly influenced by structuralist apprach of Levi-Strauss an the biologist François Jacob. In his book la logique du vivant , Jacob introduced some concepts, some vocabulary words which inspired architects. These terms, this architectural grammar is : fabric, cells, DNA, 3d structure. Candilis-Wood-Josic were influenced by Jacob’s book and radio conference at that time and did some projects around theses formal analogies. In our point of view, like Jean Renaudie said, biology findings influenced his vision of the society and contributed to question architecture, its forms, its vocabulary. For us, biological analogies following Jean-Pierre Chupin decription, contributed mostly to the development of the neo avant-garde in the 1960’s in France and the different constructions we can see in the french landscape marked the architectural theory and is widely reused nowadays. Through these conference, we want to demonstrate that hypothesis trhough the work of l’Atelier de Montrouge in which Jean Renaudie worked. [less ▲]

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See detailPrendre soin du sauvage. Le devenir de la nature pour métier.
Denayer, Dorothée ULg

Conference (2017, February)

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See detailArchitecture and deconstruction: translation as a matter of speculative theory
Bodart, Céline ULg

Conference (2017, February)

If this conference proposes to explore the singular and minor expressions of architectural theory, it could at first seem strange to propose here a paper about the so-called derridean years of ... [more ▼]

If this conference proposes to explore the singular and minor expressions of architectural theory, it could at first seem strange to propose here a paper about the so-called derridean years of architecture. Rather, the vast body of literature produced on this specific episode argues that the encounter of architectural discourses with derridean deconstruction played a major role into the implementation of "the gilded age of theory" (Mallgrave, Goodman, 2011). But such an "age" needs now to be redefined in regard with its own cultural boundaries. What the decon has produced in the Anglo-American field of architectural theory is not what the deconstruction has produced on the French-speaking part of the debate (following the argument of Cusset, 2005). In France, the question of the effects of the Derrida's philosophy on the contemporary architectural discourses and practices still causes a kind of discomfort. "As if" no one could face with what this disciplinary cross-over of the mid-eighties both has produced and has not succeeded in producing; "as if", failure or not, this experimental encounter could had been no effects or consequences on the theories and practices which succeeded it. From one cultural context to another, we have two different versions of a same history. Different but not unrelated. The proposition is here to invest the productive gap between these overlapped versions, in order to question their respective modes of construction but also to re-open their ways of being transmitted. From an original translation of Derrida's Haunt (Wigley, 1993) in French, I would present a methodological approach (Despret, 2001) which attempts to create the conditions of a renewed relation between different versions of what the deconstruction could have produced in architecture. The exercise of the translation is seen as a way to question the co-existence of these different possible versions; a way to slow down the multiple gestures which hastily sweep the hesitations in the shared course of their history. [less ▲]

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See detailDe Barcelone à Amsterdam : l'émergence de la conservation intégrée à travers les colloques internationaux du Conseil de l'Europe et de l'ICOMOS
Houbart, Claudine ULg

Conference (2017, January 31)

En 1975, la notion de conservation intégrée est consacrée par la Charte européenne du Patrimoine architectural, adoptée par le Comité des Ministres du Conseil de l’Europe avant d’être solennellement ... [more ▼]

En 1975, la notion de conservation intégrée est consacrée par la Charte européenne du Patrimoine architectural, adoptée par le Comité des Ministres du Conseil de l’Europe avant d’être solennellement proclamée et développée au Congrès d’Amsterdam (21-25 octobre 1975). Renouvelant fondamentalement les pratiques de rénovation des centres anciens avec l’ambition de créer un dialogue entre aménageurs et conservateurs, cette approche résulte de dix années de réflexions nourries par des échanges entre experts principalement européens, initiés non seulement par le Conseil de l’Europe (Confrontations de Barcelone (1965), Bath (1966), La Haye (1967) et Avignon (1968)), mais également par l’ICOMOS, dès sa fondation en 1965 (Colloques de Cacérès (1965), Tunis (1966), Leningrad et Graz (1969), Lausanne (1973), Rothenburg et Bruges (1975)). Si un regard macroscopique révèle le rôle central joué par Piero Gazzola et Raymond Lemaire, respectivement président et secrétaire général de l’ICOMOS et auteurs, avec François Sorlin, d’une étude de synthèse préalable à la Charte européenne, cette contribution se propose d’augmenter la focale afin de révéler, à travers l’étude des actes des colloques, le rôle des réseaux d’acteurs en présence dans l’élaboration de la nouvelle politique. [less ▲]

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See detailMotor assessment of children at school: Pupils’ opinion about MOBAK-1
Cloes, Marc ULg; Vandermeeren, Benjamin

Conference (2017, January 28)

School is a privileged place for evaluating children’s physical and motor competencies. Tests are often used for educational and/or research purposes. Adults collect the data but do not verify how ... [more ▼]

School is a privileged place for evaluating children’s physical and motor competencies. Tests are often used for educational and/or research purposes. Adults collect the data but do not verify how children experience these evaluations that can be perceived as difficult moments. Even if they are supposed to motivate pupils, they can decrease the self-perception and limit the participation. Several test batteries have been developed in order to measure motor development of young children (M-ABC, KTK, TGMD …). They are based on the assessment of performances. On the other hand, MOBAK-1 has been developed in order to verify if some motor competencies are mastered or not. To our knowledge, no study tried to determine how the pupils passing these tests feel about their experience. This study focused on that original topic. Seven primary school PE teachers administrated the MOBAK-1 tests to their classes (149 1st and 2d grades – 6-8 year-old). After the tests, pupils fulfilled an adapted questionnaire based on pictograms designed to facilitate pupils’ understanding. The most important finding is that 80.5% of the pupils answered that they loved doing the tests. Only 3 pupils expressed a negative opinion. As pointed out by the correlation between the real achievement mean scores and the perceived competence mean score for each test (r= 0.90), pupil’s self-assessment seemed appropriate. The correlation between the perceived competence and appraisal of the tests is lower (r=0.59). The gamelike status of some tests would be more determinant for their appraisal by the pupils than their level of achievement: balancing is definitely the most appreciated test (35.6% of the pupils selected it). In the same way, even if the achievement level is not high, throwing is relatively well appreciated. Trying to touch a target with a ball is funny. On the other hand, jumping and bouncing were ‘less’ appreciated. [less ▲]

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See detailInvolvement of PE teachers in motor testing. A pilot study with the MOBAK-1
Cloes, Marc ULg; Mouton, Alexandre ULg; Jidovtseff, Boris ULg et al

Conference (2017, January 28)

Fundamental motor patterns are prerequisites to specific motor/sports skills and a determinant of the involvement in physical activity. Several tools have been developed in order to measure motor ... [more ▼]

Fundamental motor patterns are prerequisites to specific motor/sports skills and a determinant of the involvement in physical activity. Several tools have been developed in order to measure motor development in children. Each test battery presents its own characteristics. MOBAK-1 focuses on two categories of basic motor competencies in order to record the effects of physical education (PE) at the elementary school level. That tool proposed 8 tests. For each of them, pupils receive point scores (0–2 points) according to the quality of their performance. MOBAK-1 is supposed to be used by PE teachers but there is still a lack of data about this, justifying the present study. We trained 7 PE teachers (4 males) and analysed the way they implemented the tests in their classes (1st and 2d grades – 6-8 year-old pupils). The training comprised a description of the tests with video examples of the expected movements and common errors, and an analysis of the reliability of the teachers evaluating pupils’ performances showed on video (at least 10 trials). A participating observation and a short interview were planned to analyse the evaluation process of each PE teacher. Catching and Rolling reached the reliability requirements within the first 10 trials while 15 to 16 videos were necessary for the six other tests. Two teachers seemed to have more difficulties that could be related to their lack of experience (P1) or a potential lower interest (P7). Before implementing the test with their classes, all teachers read again the guidelines. The majority was really satisfied by the information provided by the researchers (3.86/4) and confident about how to manage the evaluation (3.57/4). Five teachers worked alone and 4 were able to evaluate one class/lesson. All teachers developed specific strategies in order to save time. Several practical recommendations have been proposed. [less ▲]

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See detailApplication des principes de la classe inversée aux travaux pratiques de physique
Marique, Pierre-Xavier ULg; Toussaint, Pauline ULg; Van de Poël, Jean-François ULg et al

Conference (2017, January 27)

Une enquête interne au sein du département de Physique de l’Université de Liège (Belgique) a révélé que les assistants en charge des travaux pratiques considéraient importante l’aide qu’ils apportent aux ... [more ▼]

Une enquête interne au sein du département de Physique de l’Université de Liège (Belgique) a révélé que les assistants en charge des travaux pratiques considéraient importante l’aide qu’ils apportent aux étudiants en laboratoire. Malgré cela, les assistants sondés considèrent que les étudiants sont insuffisamment motivés lors de leur arrivée et observent un manque d’investissement dans la tâche au cours de ces laboratoires. En réponse à ces constats, un projet a été développé afin de tenter de faciliter la compréhension de la matière par les étudiants et d’accroître leur motivation à s’investir davantage dans leur formation, et en particulier, lors des travaux pratiques de physique. Basé sur le principe de la classe inversée, ce projet consiste en la réalisation de courtes séquences vidéo introductives aux travaux pratiques. Elles ont notamment pour objectif de présenter la matière sous une autre forme que celle utilisée lors des cours en classe. Concrètement, une première séquence est publiée quelques jours avant le laboratoire. Les concepts de base y sont illustrés et rapidement mis en application. Les étudiants sont alors invités à commenter une application particulière et non expliquée. Quelques jours plus tard, une seconde séquence vidéo est postée. Elle comprend la solution au problème et la présentation du matériel de laboratoire. Ces vidéos ont été conçues en accord avec les standards pédagogiques en la matière au niveau de la durée, de la distribution de la charge cognitive et des principes du multimédia. Une attention particulière a été apportée afin de rendre signifiante la matière enseignée au public particulier auquel elles s’adressent. Enfin, un test formatif composé de QCM permet à l’étudiant de s’auto-évaluer avant le laboratoire. Une analyse portant sur une éventuelle augmentation des notes obtenues aux questions en rapport avec ces deux laboratoires et sur la satisfaction des étudiants et des assistants sera effectuée. [less ▲]

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See detailAll Saved from Drowning? Afghan Refugees in Australia and Words Written in “The Ocean”: A Short Story by Gail Jones
Belleflamme, Valérie-Anne ULg

Conference (2017, January 27)

Gail Jones’s short story “The Ocean” was published in 2013 as part of an anthology edited by Thomas Keneally and Rosie Scott. Entitled A Country Too Far: Writings on Asylum Seekers, this anthology aimed ... [more ▼]

Gail Jones’s short story “The Ocean” was published in 2013 as part of an anthology edited by Thomas Keneally and Rosie Scott. Entitled A Country Too Far: Writings on Asylum Seekers, this anthology aimed to ask “some of [the] most admired Australian writers to bring a different perspective and depth to the public debate on asylum seekers”. With “The Ocean”, Jones takes up the challenge quite successfully and, I may also add, quite literally or meta-discursively. The short story’s two interwoven narratives are articulated following an ebb-and-flow movement that enhances the text’s play with the notions of liquidity and time. This is reminiscent of French philosopher Michel Serres’s view of time as made of counter-currents, undertows and turbulences. These liquid folds allow for originally distant points – with no link whatsoever – to become close, superimposed. This then creates an effect of strangeness which Jones cultivates, as when she claims that, since “we’re always in a forward-backward rhythm, not often fully here in the present moment” and “our present is inflected and intercepted by the past and the future, pleated and folded,” this means that, “if we were to see our contemporary world with the eyes of the future, we might see it suddenly aestheticized and made endearingly strange”. By focusing on Jones’s play with perspectives, her narrativisation of folds, and the intertextual link with Primo Levi’s The Drowned and the Saved, my paper will seek to investigate how Jones’s writing not only claims an ethical and moral dimension but also takes up a political stance: it is by writing from multiple perspectives and thus forging unexpected connections, allowing people of different backgrounds, cultures and religions to interconnect, that Jones voices resistance to the narrow-mindedness of those who are privileged in today’s world-wide migration crisis. [less ▲]

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See detailL'autoscopie au service de l'autoévaluation pour des futurs enseignants du secondaire
Francois, Nathalie ULg; Noël, Stéphanie ULg

Conference (2017, January 26)

Cette communication exposera le dispositif mis en place dans le cadre d’une formation d’enseignants du secondaire supérieur en psychologie et sciences de l’éducation pour amener les étudiants à ... [more ▼]

Cette communication exposera le dispositif mis en place dans le cadre d’une formation d’enseignants du secondaire supérieur en psychologie et sciences de l’éducation pour amener les étudiants à s’autoévaluer sur la base d’une autoscopie. Ces futurs agrégés effectuent des stages dans l’enseignement général ainsi que dans l’enseignement professionnalisant. Au-delà de la préparation et de la phase active de la pratique enseignante, il est indispensable pour les futurs enseignants (FE) de prendre du recul et d’évaluer leurs pratiques lors d’une phase post active. Afin de les soutenir dans cette démarche exigeante et non intuitive, les formatrices proposent un dispositif aux FE (Inspiré d’un dispositif organisé par l’équipe de Hindryckx MN. dans le cadre de la formation initiale des futurs enseignants du secondaire supérieur en biologie à l’Université de Liège). Celui-ci se décline en plusieurs phases soutenues par différents outils. Lors de deux des trois stages d’enseignement effectués, les futurs enseignants (FE) doivent se filmer en action lors d’une leçon de leur choix (avec l’appui logistique de leur « maitre de stage »). En effet, l’autoscopie, qui correspond à la démarche au cours de laquelle les FE se confrontent aux traces vidéoscopées de leur pratique (Beckers et Leroy, 2011), permet de poursuivre plusieurs objectifs : se (perce) voir en action pour prendre conscience de soi ; analyser et évaluer son propre comportement ; se transformer pour parvenir à une plus grande efficacité et satisfaction de soi (Peraya, 1990). Suite à la leçon filmée, les FE sont invités à procéder à une autoévaluation de leur pratique en plusieurs étapes (« retour à chaud », visionnage de la vidéo et analyse d’un moment de l’action soutenue par une démarche structurée et utilisation d’une grille d’autoévaluation des compétences d’enseignant pour permettre une généralisation). L’ensemble de ce processus individuel sera communiqué aux formatrices par le biais des rapports de stage et fera l’objet d’une évaluation et d’un feedback formatif. [less ▲]

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See detailRhétorique de l’exploit guerrier du manuscrit Gerard du Frattre à l’imprimé Gerard d’Euphrate
Lambert, Adélaïde ULg

Conference (2017, January 26)

Notre communication se centrerait sur les récits de combats singuliers le manuscrit Gerard du Frattre (1525) et dans l'imprimé Gerard d'Euphrate (1549). Alors que Gerard du Frattre est presque ... [more ▼]

Notre communication se centrerait sur les récits de combats singuliers le manuscrit Gerard du Frattre (1525) et dans l'imprimé Gerard d'Euphrate (1549). Alors que Gerard du Frattre est presque exclusivement constitué de scènes de guerre, le texte de 1459 fait se côtoyer aventures guerrières, amoureuses, comiques et merveilleuses. Eu égard à ces divergences structurelles et thématiques, le duel, qui constitue un motif relativement figé et caractéristique du genre épique, se présente comme un lieu d’observation privilégié pour mesurer les particularités stylistiques des deux proses. Malgré son intérêt de premier ordre, la langue littéraire telle qu’elle se développe dans les réécritures du début du XVIe siècle ne retient que rarement l’attention de la critique. Pour lors, nous étudierions les mécanismes linguistiques mis en place pour « faire jouer [...] les stéréotypes d’une tradition littéraire révolue », en nous attachant particulièrement au lexique et aux figures de style des récits d’exploits guerriers dans les deux récits gerardiens. [less ▲]

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See detailRecyclage de questions à choix multiples d’épreuves certificatives de physique en items de tests formatifs en ligne
Marique, Pierre-Xavier ULg; Van de Poël, Jean-François ULg; Hoebeke, Maryse ULg

Conference (2017, January 26)

Depuis septembre 2012, en Fédération Wallonie-Bruxelles de Belgique, les étudiants inscrits en première année de bachelier en médecine sont interrogés sous forme de questions à choix multiples lors des ... [more ▼]

Depuis septembre 2012, en Fédération Wallonie-Bruxelles de Belgique, les étudiants inscrits en première année de bachelier en médecine sont interrogés sous forme de questions à choix multiples lors des épreuves certificatives des cours scientifiques donnés au premier quadrimestre de leurs études. Au Département de Physique de l’Université de Liège, les questions des examens antérieurs sont répertoriées, et éventuellement améliorées, afin d’être réutilisées dans le cadre d’un outil d’entraînement en ligne, appelé « simulateur d’examens » (Marique, 2015). Cet outil est destiné à améliorer des connaissances directement en lien avec une stimulation constante de la mémoire des étudiants à l’aide de QCM. Les questions sont analysées de 2 façons différentes : d’une part sur base des résultats des étudiants lors de l’examen (indice de facilité P et P’ et indices de discrimination B et D) et d’autre part, par une évaluation effectuée par les membres de l’équipe pédagogique. Ceux-ci attribuent un niveau de difficulté à chaque question en fonction de 4 critères empiriques : abstraction, réflexion, mixité, mathématiques. Chaque évaluateur attribue une note de 1 à 3 à chacun des critères. La somme obtenue indiquera le niveau de difficulté total de la question selon une règle simple. A l’avenir, dans une perspective d’amélioration du classement par niveau des questions disponibles dans le simulateur d’examens, la concordance entre l’indice P’ et le niveau de difficulté qui lui a été attribué par l’équipe pédagogique, sera étudiée. L’impact de ce système sur l’apprentissage des étudiants fait actuellement l’objet d’un suivi particulier et précis. Toutes les tentatives des étudiants et leurs résultats sont enregistrés systématiquement en prévision d’une analyse des effets de ce système. [less ▲]

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See detailRenouveler les maquettes ? Pourquoi pas selon une approche-programme au service de la compétence
Georges, François ULg

Conference (2017, January 26)

L’approche par compétences trouve dans l’approche programme un cadre adapté à son opérationnalisation. Dans notre présentation, nous présenterons différentes façons dont des équipes se sont approprié ces ... [more ▼]

L’approche par compétences trouve dans l’approche programme un cadre adapté à son opérationnalisation. Dans notre présentation, nous présenterons différentes façons dont des équipes se sont approprié ces deux approches. Nous nous centrerons sur quelques principes propices à l’édification d’une maquette adaptée au développement de compétences et explorerons quelques pistes utiles à son évaluation qualité. Nous terminerons notre intervention par la présentation des principaux leviers susceptibles de favoriser l’implantation efficace de l’approche programme. [less ▲]

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See detailÉvaluation de la réflexivité au travers de portfolio dans trois contextes formatifs de l’enseignement supérieur
Housen, Marie ULg; Lambert, Isabelle ULg; Pirard, Florence ULg

Conference (2017, January 25)

Cette communication est centrée sur l’évaluation de compétences réflexives à partir de l’analyse de portfolios d’étudiants de 1ère année du baccalauréat « Éducateur spécialisé en accompagnement psycho ... [more ▼]

Cette communication est centrée sur l’évaluation de compétences réflexives à partir de l’analyse de portfolios d’étudiants de 1ère année du baccalauréat « Éducateur spécialisé en accompagnement psycho-éducatif », d’étudiants de 1ère année de promotion sociale en esthétique sociale et d’étudiants de 1ère année d’un master en Sciences de l’Éducation. Dans ces trois contextes formatifs de l’enseignement supérieur, nous nous sommes intéressées aux traces écrites permettant de mettre en lumière des indices de réflexivité (Hatton & Smith, 1995) et ce, à l’aide d’une grille de réflexivité (Housen & Pirard, 2016) adaptée à partir des travaux d’Alin et Michaud (2010). Par l’adaptation de cette grille, nous souhaitions créer un outil générique, sans être normatif, permettant d’être adapté à différents contextes formatifs. C’est pourquoi, nous avons choisi de mettre cette grille à l’épreuve de deux nouveaux contextes formatifs. [less ▲]

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See detailModélisation de la réponse au hasard dans les questionnaires à choix multiples : une approche par modèles de réponses aux items polytomiques
Magis, David ULg

Conference (2017, January 25)

Lorsque l’on doit évaluer les résultats d’un test à l’aide de questions à choix multiples (QCM), le traitement des réponses au hasard (« guessing ») est un enjeu crucial pour une évaluation fiable et non ... [more ▼]

Lorsque l’on doit évaluer les résultats d’un test à l’aide de questions à choix multiples (QCM), le traitement des réponses au hasard (« guessing ») est un enjeu crucial pour une évaluation fiable et non biaisée de la compétence testée. Divers mécanismes (comme l’application d’une correction pour le guessing) ont été proposées mais ne sont pas exemptes de problèmes méthodologiques. Une approche par modèles de réponses aux items (MRI) est aussi souvent considérée, mais revient à résumer les réponses des QCM en « vrai/faux » et appliquer des modèles dichotomiques (comme le modèle logistique à trois paramètres). Le but de cette présentation est double : (a) mettre en évidence les faiblesses d’une telle approche dichotomique, et (b) présenter une modification d’un modèle de réponses aux items polytomiques qui prend en compte le possible « guessing » des participants. Cette approche a l’avantage de modéliser chaque réponse possible (y compris les distracteurs) tout en autorisant une réponse au hasard pour les participants de compétence plus faibles. Une comparaison des approches dichotomique et polytomique est réalisée au moyen de données simulées selon un modèle de réponse au hasard plausible. Les avantages et inconvénients de l’approche polytomique, tant du point de vue technique que pédagogique, sont discutés. [less ▲]

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See detailAnalyser sans compter ni classer. Approches qualitatives de la recherche en soins en psychiatrie
Lejeune, Christophe ULg

Conference (2017, January 25)

Les recherches dans le champ de la santé s'appuient traditionnellement sur les protocoles standardisés de la recherche expérimentale. Ce type de recherches a montré son efficacité en médecine, en ... [more ▼]

Les recherches dans le champ de la santé s'appuient traditionnellement sur les protocoles standardisés de la recherche expérimentale. Ce type de recherches a montré son efficacité en médecine, en psychologie et en psychiatrie (notamment). Ces méthodes ne suffisent cependant plus lorsqu'il s'agit d'appréhender la situation de soin dans son épaisseur psychologique, interpersonnelle et sociale. La recherche qualitative convient alors mieux pour appréhender (par exemple) les interactions entre les patients et le personnel soignant. Spécifiques, les méthodes qualitatives n'en sont pas moins sérieuses, normées et scientifiques. Combinant rigueur, souplesse et pragmatisme, une recherche qualitative bien menée délivre une connaissance fine et permet en outre d'instruire les pratiques des premiers intéressés [less ▲]

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See detailLa détection des réponses inappropriées dans les examens: une étude de 3 indices corrigés selon la méthode de Snijders
Béland, Sébastien; Raîche, Gilles; Magis, David ULg

Conference (2017, January 25)

Certains étudiants peuvent répondre au hasard ou être inattentifs en situation d’examen. Les indices de détection de patrons de réponses inappropriés (person-fit index) sont prometteurs pour détecter ces ... [more ▼]

Certains étudiants peuvent répondre au hasard ou être inattentifs en situation d’examen. Les indices de détection de patrons de réponses inappropriés (person-fit index) sont prometteurs pour détecter ces types de réponse. Nous allons, dans le cadre de cette communication, nous pencher sur le cas de trois indices de détection populaires qui présentent des caractéristiques permettant d’en faciliter l’interprétation : lz, ZU et ZW. Par contre, des études antérieures ont montré que ces trois indices sont fortement affectés par le fait que l’habileté d’un étudiant est estimée plutôt que réelle (Molenaar et Hoijtink, 1990). Snijders (2001) a proposé une version corrigée de l’indice lz (nommée lz*) afin de tenir compte de cette difficulté. De leur côté, Magis, Béland et Raîche (2014) ont corrigé deux autres indices selon l’approche de Snijders (2001) : U* et W*. Il reste cependant à analyser plus en détails le comportement de la famille des indices corrigés, soit, lz*, U* et W*. Pour ce faire, nous effectuons une étude de simulation et une étude des données du test de classement en anglais, langue seconde (TCALS-II). Les résultats démontrent que les indices corrigés lz* et W* sont les plus intéressants à utiliser. De son côté, U* présente des résultats parfois inappropriés, ce qui relance la réflexion sur la pertinence des indices de détection basés sur les carré-moyens non-pondérés. [less ▲]

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See detailLes révolutions de Leonard Cohen et les paradoxes de la modernité
Mus, Francis ULg; Ringuet, Chantal

Conference (2017, January 24)

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See detailRelease of Neutrophils Extracellular Traps as a main trigger for asthma onset
Radermecker, Coraline ULg; Sabatel, Catherine ULg; Toussaint, Marie et al

Conference (2017, January 24)

Allergic asthma is an important Th2 associated immunopathology. Even if the pathology of the disease is well described, its etiology is still largely unknown. Nevertheless, some environmental factors like ... [more ▼]

Allergic asthma is an important Th2 associated immunopathology. Even if the pathology of the disease is well described, its etiology is still largely unknown. Nevertheless, some environmental factors like viral infections and exposition to low doses of lipopolysaccharide (LPS) strongly increase the risk of disease inception. Interestingly, these two particular risk factors both induce a strong recruitment of neutrophils into the lung. Recently, scientists highlighted the ability of neutrophils to form neutrophils extracellular traps (NETs) composed of a network of extracellular DNA associated to anti-microbial peptides. NETs release (or NETosis) is an important component in organism defence against pathogen invasion but has also been identified as initiator of pathophysiological conditions like erythematous systemic lupus, gout and diabetes. In this study, we investigated the role of NETs as potential asthma inducers in specific pro-Th2 environmental risk factors like respiratory viral infections and low LPS doses exposures (also known as hygiene hypothesis). First, we assessed the correlation between respiratory viral infection or low LPS exposure and NETosis using western blot and confocal microscopy analysis. An influenza A infection induced a strong NETs release between day three and seven after viral inoculation whereas exposition to low (100 ng LPS) but not to high (10 µg LPS) LPS doses also promoted NETosis within 24 hours following the exposition. Then we developed two mouse models, a virus-induced asthma model and a model of asthma promoted by exposition to low LPS doses. In these models, only previously infected mice or mice exposed to low LPS doses displayed all the characteristics of allergic asthma following sensitization and challenge to house dust mite (HDM). The role of NETs in asthma onset was then demonstrated using three NETosis inhibitors (DNAse, Cl-amidine and inhibitor of neutrophil elastase) in our models as infected or low LPS doses exposed mice exhibited strong decreased of all key asthma features when treated with NETs inhibitors compared to non-treated mice. Finally, to address how NETs could lead to a TH2 immune response, we analysed by flow cytometry the distinct subpopulations of lung dendritic cells (DCs) in our two mice models. We observed, during the NETs release phase, a recruitment of monocytic derived DCs (moDCs). In conclusion, we have demonstrated an unexpected role for NETs in asthma onset by recruiting lung moDCs. [less ▲]

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See detailQuel est l'intérêt du test de Pak chez les patients lithiasiques?
Castiglione, Vincent ULg

Conference (2017, January 24)

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See detailDes triangles de Pascal généralisés aux coefficients binomiaux de mots finis
Stipulanti, Manon ULg

Conference (2017, January 23)

We introduce a generalization of Pascal triangle based on binomial coefficients of finite words. These coefficients count the number of times a word appears as a subsequence of another finite word ... [more ▼]

We introduce a generalization of Pascal triangle based on binomial coefficients of finite words. These coefficients count the number of times a word appears as a subsequence of another finite word. Similarly to the Sierpinski gasket that can be built as the limit set, for the Hausdorff distance, of a convergent sequence of normalized compact blocks extracted from Pascal triangle modulo 2, we show the existence of a subset of [0, 1]×[0, 1] associated with this extended Pascal triangle modulo a prime p. [less ▲]

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See detailSous-arbres induits pleinement feuillus : résultats de complexité
Vandomme, Elise ULg

Conference (2017, January 23)

Dans les 30 dernières années, les polyominos ont été l'objet de nombreuses investigations. Un problème central, qui est pourtant toujours ouvert, est de déterminer le nombre de polyominos à n cellules ... [more ▼]

Dans les 30 dernières années, les polyominos ont été l'objet de nombreuses investigations. Un problème central, qui est pourtant toujours ouvert, est de déterminer le nombre de polyominos à n cellules carrées. Une approche possible de ce problème est d'utiliser une description combinatoire. Derrière chaque polyomino se cache un graphe dont les sommets correspondent aux cellules, tel que deux sommets sont adjacents si les cellules ont un côté en commun. Dans ce contexte, on peut étudier les polyominos dont le graphe est acyclique, appelés polyominos-arbres. En 2016, Blondin-Massé et al. ont déterminé le nombre maximal de feuilles que peut posséder un polyomino-arbre à n cellules. Dans cet exposé, nous généralisons ce problème aux graphes en général et nous montrons que le problème est NP-complet. Cependant, le problème devient polynomial lorsqu'on se restreint aux arbres et aux graphes de largeur arborescente constante. [less ▲]

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See detailStatistical description of hydrogeological parameters for the main aquifer contexts in Wallonia
Briers, Pierre ULg; Dollé, Fabien ULg; Orban, Philippe ULg et al

Conference (2017, January 20)

The Walloon Region Soil decree proposes a series of guidance documents associated to the procedures for site remediation operations. Among others, one of these documents describes methodologies and tools ... [more ▼]

The Walloon Region Soil decree proposes a series of guidance documents associated to the procedures for site remediation operations. Among others, one of these documents describes methodologies and tools for risk assessment of pollutant leaching from soil to groundwater and for pollutant dispersion through groundwater. These tools require using estimates of hydrogeolocial parameters such as hydraulic conductivity, effective (transport) porosity etc. In this context, an inventory of hydrogeological studies (regional characterization studies, groundwater protection zones…) was performed to identify and collect available field-based measurements for a statistical description and analysis of such data. Complementary to that, a simple geodatabase has been developed to manage and process these data. As expected, these results show contrasted parameter distributions per geological contexts and regions. The objective of the presentation is to describe the methodology followed for the statistical treatment of hydrogeological data and to present the results and associated database. It is believed that such results can be very useful for different hydrogeological studies, in particular as a first referential for groundwater modelling applications and any other studies where statistical descriptions of hydrogeological data are relevant. [less ▲]

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See detailMars Ozone mapping with MAVEN IUVS
Lefèvre; Stiepen, Arnaud ULg; IUVS team

Conference (2017, January 20)

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See detailCharacterization of High Altitude Clouds at the Martian Limb and Terminator Using MAVEN IUVS Observations
Deighan; Stiepen, Arnaud ULg; IUVS team

Conference (2017, January 20)

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See detailL’empathie chez les futurs médecins, innée ou acquise ?
Désert, Jean-Benoit; Nasello, Julian ULg; Cornet, Annie ULg et al

Conference (2017, January 18)

L’empathie est un processus complexe où interagissent de manière dynamique des composantes affectives, cognitives et sociales. Les étudiants en médecine seraient-ils prédisposés à être empathiques ... [more ▼]

L’empathie est un processus complexe où interagissent de manière dynamique des composantes affectives, cognitives et sociales. Les étudiants en médecine seraient-ils prédisposés à être empathiques ? L’empathie varierait-elle au cours de la formation ? Pour répondre à ces questions, nous avons comparé les niveaux d’empathie chez des étudiants en Médecine (groupe expérimental) en comparaison à des étudiants issus des Hautes Etudes Commerciales (HEC) n’ayant bénéficié d’aucune formation à la relation de soin (groupe contrôle). [less ▲]

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See detailGlobal UV Imaging by MAVEN/IUVS: Diurnal Cloud Formation, Dust Storms and Atmospheric Scattering.
Schneider; Deighan; Jain et al

Conference (2017, January 17)

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See detailIs Büchi's theorem useful for you? (for an audience of logicians)
Rigo, Michel ULg

Conference (2017, January 17)

Almost a century ago, Presburger showed that the first order theory of the natural numbers with addition is decidable. Following the work of B\"uchi in 1960, this result still holds when adding a function ... [more ▼]

Almost a century ago, Presburger showed that the first order theory of the natural numbers with addition is decidable. Following the work of B\"uchi in 1960, this result still holds when adding a function $V_k$ to the structure, where $V_k(n)$ is the largest power of $k\ge 2$ diving $n$. In particular, this leads to a logical characterization of the $k$-automatic sequences. During the last few years, many applications of this result have been considered in combinatorics on words, mostly by J. Shallit and his coauthors. In this talk, we will present this theorem of B\"uchi where decidability relies on finite automata. Then we will review some results about automatic sequences or morphic words that can be proved automatically (i.e., the proof is carried on by an algorithm). Finally, we will sketch the limitation of this technique. With a single line formula, one can prove automatically that the Thue-Morse word has no overlap but, hopefully, not all the combinatorial properties of morphic words can be derived in this way. We will not assume any background in combinatorics on words from the audience. [less ▲]

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See detailGlobal Simulation of UV Atmospheric Emissions
González-Galindo, F.; López-Valverde, M. A.; Forget, F. et al

Conference (2017, January 17)

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See detailNO Nightglow studies status
Stiepen, Arnaud ULg; Jain; Deighan et al

Conference (2017, January 16)

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See detailBreaking Bad News: the TAKE five program
VAN CAUWENBERGE, Isabelle ULg; GILLET, Aline ULg; Bragard, Isabelle ULg et al

Conference (2017, January 14)

Introduction For years, bad news delivery’s impact on patients or their relatives, as well as physicians’ stress has been a major concern. Based on studies claiming the efficacy of training courses to ... [more ▼]

Introduction For years, bad news delivery’s impact on patients or their relatives, as well as physicians’ stress has been a major concern. Based on studies claiming the efficacy of training courses to help physicians delivering such news, many protocols, like SPIKES, BREAKS or SHARE, have emerged worldwide. However, training to such protocol might be time-consuming and not suitable with junior doctors or trainees’ turnover. We hypothesised that a standardized 5-hours training program could improve bad news delivery practice. Participants and methods This preliminary study was conducted in the ED of a tertiary care academic hospital accounting for 90000 ED census per year, 16 attending physicians, 10 junior residents, and 5 trainees per month. Data were collected between November 2015 and April 2016. The study included 3 phases over 4 weeks. Video recorded single role-playing sessions happened the 1st (T1) and the 4th (T3) weeks. A 3-hour theory lesson happened the second week (T2), introducing the basics of therapeutic communication and delivering bad news. Each role-playing session lasted almost 1 hour (10 minutes briefing and medical case reading, 10 minutes role-plays and 40 minutes group debriefing). Bad news delivery performance was evaluated by a 14-points retrospective assessment tool (1). We collected data about the status and impact of a stressful event at 3-days using the French version of the IES-R scale (2). We applied Student t-tests for statistical analysis. Results 14 volunteers (10 trainees and 4 junior emergency physicians) were included in the study. On average, bad-news delivery process took 9’45’’ at T1 and 10’20’’ at T3. From T1 to T3, bad-news delivery performance increased significantly for both junior emergency physicians and trainees (p=0.0003 and p=0.0006, respectively). Further analysis revealed that most relevant increases involved the “situation” (p<0.001), “presentation” (p=0.009), “knowledge” (p=0.037), “emotions” (p=0.01) and “summary” (p=0.001) steps. We also found a significant decrease of the impact of bad-news delivery on trainee physicians’ stress (p=0.006). Discussion and conclusion These preliminary results indicate some potential for this new standardized course of bad news delivery. Apart from allowing physicians increase their communications skills, we believe that this simple 5-hour simulation-training program could alleviate physicians’ stress when they happen to break bad news. References 1. Brunet, A. et al. (2003). Validation of a French version of the Impact of Event Scale-Revised. Can J Psychiatry, 48(1), 56-61. 2. Park, I. et al. (2010). Breaking bad news education for emergency medicine residents: A novel training module using simulation with the SPIKES protocol. J Emerg Trauma Shock, 3(4), 385-388. [less ▲]

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See detailGeneralized Pascal triangles for binomial coefficients of words: a short introduction
Stipulanti, Manon ULg

Conference (2017, January 09)

We introduce a generalization of Pascal triangle based on binomial coefficients of finite words. These coefficients count the number of times a finite word appears as a subsequence of another finite word ... [more ▼]

We introduce a generalization of Pascal triangle based on binomial coefficients of finite words. These coefficients count the number of times a finite word appears as a subsequence of another finite word. Similarly to the Sierpiński gasket that can be built as the limit set, for the Hausdorff distance, of a convergent sequence of normalized compact blocks extracted from Pascal triangle modulo 2, we describe and study the first properties of the subset of [0, 1] × [0, 1] associated with this extended Pascal triangle modulo a prime p. [less ▲]

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See detailPatterns of body size and shape diversification in marine angelfishes (Pomacanthidae)
Frederich, Bruno ULg; Santini, Francesco; Konow, Nicolai et al

Conference (2017, January 06)

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See detailInnovations Thérapeutiques appliquées au diabète
RADERMECKER, Régis ULg

Conference (2017, January)

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See detailMARTIAN ULTRAVIOLET AURORA: RESULTS OF MODEL SIMULATIONS
Gérard, Jean-Claude ULg; Soret, Lauriane ULg; Shematovich, V.I. et al

Conference (2017, January)

We present recent modeling results based on observations performed with the UV spectrographs on board the Mars Express and MAVEN missions.Two types of aurora are discussed: the localized and transient ... [more ▼]

We present recent modeling results based on observations performed with the UV spectrographs on board the Mars Express and MAVEN missions.Two types of aurora are discussed: the localized and transient discrete aurora and the more stable diffuse aurora observed during periods of active solar periods. [less ▲]

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See detailPlant fibers for renewable growing media: acidification or inoculation with biocontrol fungi to reduce the N drawdown in extruded Miscanthus straw
Vandecasteele, Bart; Debode, Jane; Muylle, Hilde et al

Conference (2017)

Peat based growing media are not sustainable and not easily colonized by biocontrol organisms. Plant fibers may allow for partially replacing peat in growing media and they may have the potential to carry ... [more ▼]

Peat based growing media are not sustainable and not easily colonized by biocontrol organisms. Plant fibers may allow for partially replacing peat in growing media and they may have the potential to carry biocontrol organisms. However, they may also carry plant pathogens and they may vary in their degree of biodegradability and their interaction with N, and thus they may affect the quality of growing media. Several defiberization techniques were tested for flax shives, miscanthus and reed straw for their ability to (1) kill plant pathogens present on the plant fibers, (2) reduce the N-fixation risk of the fibers and (3) provide fibers serving as carrier of biocontrol fungi. Flax shives obtained from various sources were colonized by viable microsclerotia of the plant pathogen Verticillium dahliae. However, when sufficiently high temperatures were reached during defiberization, this technique killed the plant pathogen on the shives, allowing the use of defiberized flax shives in growing media. Untreated flax shives, miscanthus or reed straw were characterized by high N immobilization. Using these plant fibers as peat replacement in growing media may thus reduce N availability for plants. According to the incubation trials results, extruding, retruding and applying disc refining significantly reduced the N immobilization for miscanthus straw without affecting the pH of the fiber, while steam explosion significantly reduced the pH and resulted in higher N immobilisation. Extruding and retruding the flas shives increased the N fixation. Defiberized pure miscanthus or reed straw and flax shives were easily colonized by fungal biocontrol strains, e.g. Trichoderma spp. . The effect of inoculation with fungi or acidification on N fixation was tested for extruded miscanthus fibers. Inoculation with shiitake (Lentinula edodes) or Agrocybe aegerita, i.e., 2 fungi without biocontrol properties was effective in reducing the N immobilization only in a specific pH range and at high colonization degree and/or for fungi with fast colonization, but never increased the N fixation when successfully inoculated. Inoculation of extruded Miscanthus fibers with different strains of biocontrol fungi did not increase nor decrease the N immobilization. Reducing the pH of the fibers between pH 2.5 and 4.7 was effective in reducing the microbial activity and the N fixation. Finetuning the conditions is necessary when applying acidification or inoculation for reducing the N fixation in plant fibers. N immobilization in growing media is related to biological activity. We compared 3 methods to determine the microbial biomass on plant fibers in growing media incubated with mineral N fertilizers, i.e., fumigation-extraction, plfa and Q-PCR, and used water-extractable C to measure the easily available C in the plant fibers. The extrusion of miscanthus straw with or without inoculation of a biocontrol organism reduced the N immobilization when compared with the pure fiber. In case of flax shives, defiberization of plant fibers kills plant pathogens that may be present on the fibers when sufficiently high temperatures are reached during defiberization. Inoculation of plant fibers with biocontrol fungi may be beneficial for increasing the disease resistance in growing media, and we found that inoculation of extruded Miscanthus fibers with biocontrol fungi did not increase nor decrease the N immobilization. [less ▲]

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See detailImproved high throughput DNA-seq based mapping of HTLV-1 integration sites: a tool to define response to treatment, ATL prognosis and guide therapeutic strategies
Marçais, Ambroise; Artesi, Maria ULg; Durkin, Keith ULg et al

Conference (2017)

Background Adult T-cell leukemia/lymphoma (ATL) is an aggressive CD4+ T-cell malignancy caused by HTLV-1 infection and associated with extremely poor prognosis. In France, treatment strategies mainly ... [more ▼]

Background Adult T-cell leukemia/lymphoma (ATL) is an aggressive CD4+ T-cell malignancy caused by HTLV-1 infection and associated with extremely poor prognosis. In France, treatment strategies mainly include chemotherapy, antiviral therapy and allogeneic stem cell transplantation, based on clinical subtype and therapeutic responses. Response to treatment is evaluated based on consensus criteria defined in 2009 (Tsukasaki K, Hermine O et al, JCO 2009). Although immuno-phenotyping, TCRγ rearrangement and HTLV-1 proviral load (PVL) quantification are often assayed, complete clinical remission (CR) is currently defined by morphological and cytological criteria i.e. complete blood cell counts (CBC) and the presence of abnormal lymphocytes. Given the extremely poor prognosis and high rates of early relapse, a revision of the response criteria is required, calling for improved tools that integrate specific aspects of the pathophysiology of ATL to better estimate response to treatment. Methods We retrospectively analyzed longitudinal PBMC samples from 6 ATL patients diagnosed with a leukemic subtype (5 acute and 1 chronic-aggressive) which all achieved CR upon therapy, yet relapsed after a median time of 15,9 months (range 2,4-70,7). CR was assessed by morphological and cytological criteria. An improved high throughput sequencing (HTS) based method was utilized to map and quantify the abundance of HTLV-1 genomic integration sites (IS), overcoming some of the limitations of previously published protocols. The dynamic range was increased by assaying both the 5’LTR and 3’LTRs, allowing better determination of clone abundance and revealing 5’ deletions. An enrichment step limited PCR duplicates. The addition of off-the-shelf Illumina primers simplified library multiplexing and reduced the costs to the point where the protocol could be applied to a clinical setting. Results HTS- mapping of HTLV-1 IS at diagnosis revealed in all cases a unique IS that constituted 92-99% of proviral genomes, with PVLs of 33-510%. All patients were treated and achieved CR which was characterized by normalized CBC, <5% abnormal lymphocytes and the absence of measurable tumors for >4 weeks. For 3/6 patients, the clone frequency distribution of HTLV-1 infected cells at CR was composed of multiple low abundance clones, of which the unique presumed malignant IS contributed to less than 2% of proviral genomes. In contrast, clonality analysis of the remaining 3/6 patients revealed that the relative abundance of the malignant clone detected at diagnosis remained dominant at CR (36-83% of PVL), despite clinical response criteria typical of CR and a 3-20-fold decrease in PVLs. These patients relapsed after 2.4, 2.9 and 3.4 months respectively with a dominant malignant clone >95% while patients with a polyclonal architecture showed significantly longer CR (28, 59 and 71 months). Conclusions Our observations highlight the great heterogeneity within an identical CR group, underlining the need for revisiting response criteria for ATL. Our results call for the use of this improved HTS-based method to measure HTLV-1 clonality as a tool to better estimate response to treatment, predict relapse and guide therapeutic choices in the course of treatment. [less ▲]

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See detailMeasured soil erosion and catchment sediment yield data from Africa: an overview
Vanmaercke, Matthias ULg; Poesen, Jean; Broeckx, Jente

Conference (2017)

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See detailLong-term effects of exercise during youth or adulthood on cocaine reactivity in mice: qualitative developmental differences
Lespine, Louis-Ferdinand ULg; Tirelli, Ezio ULg

Conference (2017)

Epidemiological studies suggest that physical exercise could have preventive properties on drugs vulnerability. Animal research showed that rats or mice housed with a running wheel (a model of physical ... [more ▼]

Epidemiological studies suggest that physical exercise could have preventive properties on drugs vulnerability. Animal research showed that rats or mice housed with a running wheel (a model of physical exercise) can exhibit attenuated drug seeking and drug-induced psychomotor hyperactivity in comparison with their sedentary counterparts. Objectives: the aim was to evaluate the longevity of the protective effects of exercise on cocaine vulnerability and the influence of the developmental stage during which exercise is applied (in 4 experiments). Method: females and males C57BL/6J mice, aged 28 (youth) or 77 days (adults) were housed with (n=56) or without (n=28) a running wheel. After 3 weeks, half of the exercised mice (n=28) were deprived of their wheel (3 housing conditions/experiment). Three weeks later, mice were tested for sensitization to the psychomotor-activating effects of 8 mg/kg cocaine over 9 once-daily sessions (controls: saline solution). Mice were also tested 30 days later for their long-term expression of sensitization. Results: continuous wheel-running housing reduced cocaine responsiveness in both females and males regardless of the age on which exercise was introduced. Exercise performed exclusively in youth, but not over adulthood, reduced durably cocaine responsiveness, particularly in females. Conclusion: the likelihood of the long-term protection of exercise against cocaine responsiveness may depend on the age of exercise application and the gender. [less ▲]

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See detailLa Célestine versus Lazarillo: un cas de crossover littéraire
Francois, Jeromine ULg

Conference (2017)

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See detailTraduire le roman philosophique : le cas des Pages, de Murray Bail
Herbillon, Marie ULg

Conference (2017)

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See detailA Duality for Boolean Contact Algebras
Raskin, Julien ULg; Hansoul, Georges ULg

Conference (2017)

The well-known de Vries duality, established by H. de Vries in 1962, states that the category of compact Hausdorff spaces is dually equivalent to that of de Vries algebras. The notion of Boolean contact ... [more ▼]

The well-known de Vries duality, established by H. de Vries in 1962, states that the category of compact Hausdorff spaces is dually equivalent to that of de Vries algebras. The notion of Boolean contact algebra (BCA) was developed independently in the context of region-based theory of space. Düntsch and Winter established a representation theorem for BCAs, showing that every BCA is isomorphic to a dense subalgebra of the regular closed sets of a T_1 weakly regular space. It appears that BCAs are a direct generalization of de Vries algebras, and that the representation theorem for complete BCAs generalizes de Vries duality for objects. During a conference, Vakarelov raised the question of dualizing morphisms. We answer this question using concepts similar to those of modal logic's neighborhood semantics. [less ▲]

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See detailLes circuits courts : organisations hybrides sous haute(s) tension(s) ?
Maréchal, Kevin ULg; Plateau, Lou; Holzemer, Laurence

Conference (2017)

Detailed reference viewed: 13 (3 ULg)