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See detailPotential uses of pumped urban groundwater. A case study in Sant Adrià del Besòs (Spain)
Jurado Elices, Anna ULg; Vázquez-Suñé; Pujades, Estanislao ULg

in Hydrogeology Journal (2017)

Urban groundwater has been over-exploited during the past, mainly for industrial uses, and it now tends to be reduced or abandoned due to pollution and/or changes in land use. The use and the subsequent ... [more ▼]

Urban groundwater has been over-exploited during the past, mainly for industrial uses, and it now tends to be reduced or abandoned due to pollution and/or changes in land use. The use and the subsequent disuse of groundwater resulted in rising water tables that damage underground structures (e.g., building basements and underground car parks and tunnels), leading to additional pumping in urban areas. This is the case of the underground parking lot of Sant Adrià del Besòs (NE Spain), where large amounts of urban groundwater are pumped to avoid seepage problems. The question that arises here is if this pumped groundwater can be used for other purposes (e.g., drinking water and urban irrigation) instead of wasting this valuable resource. To answer this question, it is necessary to quantify the groundwater recharge and to assess the evolution of ground-water quality in order to properly identify its potential uses. The limiting factor to define the uses of this resource is the groundwater quality because ammonium and some metals (iron and manganese) are present at high concentrations. Hence, further treatment would be needed to meet drinking water requirements. The pumped groundwater could also be used for supplying the ecological river flow and/or for mitigating seawater intrusion problems. Currently, only a small amount of this urban groundwater is used for cleaning public areas and watering public gardens. This situation highlighted the urgent need to manage this resource in a responsible and more efficient manner, especially in moments of high water demand such as drought periods. [less ▲]

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See detailRecognition memory is associated with hippocampal volume in aging population: new evidence from brain imaging study
Narbutas, Justinas ULg; Blanpain, Manon ULg; Van Egroo, Maxime ULg et al

Poster (2017, March 23)

Introduction. The hippocampus is crucial for episodic memory, especially for recollection and pattern separation (i.e., the ability to store similar episodes as distinct memory traces). Episodic memory ... [more ▼]

Introduction. The hippocampus is crucial for episodic memory, especially for recollection and pattern separation (i.e., the ability to store similar episodes as distinct memory traces). Episodic memory declines with aging and this has been associated with hippocampal dysfunction. The main objective of our study was to explore how performance on a recognition memory task designed to assess pattern separation is associated with hippocampal volume in aging population. Methods. Fourteen healthy late middle-aged participants (52-69 years-old) were evaluated on a Mnemonic Similarity Task (MST). In this task, participants study pictures and then have to discriminate between targets, similar lures, and unrelated foil objects. Recognition memory (RM) is assessed as the difference between hits and false alarms to unrelated foils, while pattern separation Bias metric (BPS) is the difference between the rate of ‘‘Similar’’ responses given to the lure items minus ‘‘Similar’’ responses given to the foils. Hippocampal volume was calculated using ASHS software, which uses T1-weighted and T2-weighted MRI to obtain optimal segmentation of hippocampal subfields. Results. Correlation analysis of preliminary data revealed that RM was significantly positively associated with the volume of the left subiculum and left perirhinal area 35, while there were no significant correlations in the right hemisphere. BPS was positively correlated with the volume of right CA2 region, but negatively associated with the volume of right CA3 region, what is more contradictory according to the current literature. No significant link was found between BPS and the volume of hippocampal subfields in the left hemisphere. Conclusion. In a middle-aged population, better visual recognition memory is associated with larger volume of the left subiculum and perirhinal area 35, two regions supporting representation of objects [less ▲]

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See detailConstruction, restauration et ornement: pour une histoire de quelques chantiers "décapants"
Houbart, Claudine ULg; Detry, Nicolas

Conference (2017, March 23)

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See detailInterest of multisite bacterial screening for the diagnosis of congenital listerisosis with negative blood culture: a case report
Snyers, Diane ULg; Thirion, Sophie ULg; Kalenga, Masendu ULg et al

Scientific conference (2017, March 23)

Listeria monocytogenes (LM) is known to cause severe invasive disease in pregnant women and in newborns. Fortunately, despite the wide natural distribution of this pathogen, clinically overt neonatal ... [more ▼]

Listeria monocytogenes (LM) is known to cause severe invasive disease in pregnant women and in newborns. Fortunately, despite the wide natural distribution of this pathogen, clinically overt neonatal infections occurs rarely. As a consequence, listeriosis is not always considered for early onset neonatal infection, especially when blood culture is negative. Indeed, identification of listeria in the blood stream by conventional bacteriological methods remains the reference method for diagnosing listeriosis. We report a case of congenital listeriosis with negative blood culture despite typical chorioamnionitis, where the pathogen was cultured in gastric aspirate.Although the disease is rare, congenital listeriosis still remain a possible challenging condition in neonatal practice as revealed by this case report. This also shows the importance of multisite bacterial culture beside conventional blood and CSF culture, in combination with histological examination of the placenta for the diagnosis of congenital listeriosis. [less ▲]

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See detailLe droit de vote en Belgique, 1830-2017
Lanneau, Catherine ULg

Conference given outside the academic context (2017)

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See detailLa Cour pénale internationale et les crimes de guerre
Deprez, Christophe ULg

Scientific conference (2017, March 23)

Ces dias ont servi de support à une présentation introductive sur la compétence de la Cour pénale internationale en matière de crimes de guerre, proposée dans le cadre du séminaire "Guerre & Droit ... [more ▼]

Ces dias ont servi de support à une présentation introductive sur la compétence de la Cour pénale internationale en matière de crimes de guerre, proposée dans le cadre du séminaire "Guerre & Droit" organisé à l'Université catholique de Louvain (2016-2017) [less ▲]

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See detailImpact of the number of alternatives during a forced-choice recognition task on recollection and familiarity in normal aging
Simon, Jessica ULg; Gilsoul, Jessica ULg; Bastin, Christine ULg

Poster (2017, March 23)

Forced-choice recognition tasks are often used to evaluate recognition memory. However, no study have specifically investigate the impact of the number of alternatives on memory performance. Here, we ... [more ▼]

Forced-choice recognition tasks are often used to evaluate recognition memory. However, no study have specifically investigate the impact of the number of alternatives on memory performance. Here, we wanted to determine, on the one hand, if the number of alternatives - two or three - and on the other hand if the degree of similarity between targets and foils have an impact on recognition strategies. Moreover, we investigated how aging interacted with these variables. We recruited 20 young and 20 older participants. During the reconnaissance task, they had to choose, among two or three photographs of faces, the one that was presented previously. Some couples of targets and foils were more similar than others (sharing 60% of common characteristics versus 40%). For each selected item, the participants had to explain what guided their choice via verbal reports. We observed similar performance between the groups for the two-alternative recognition memory task, while young participants had better performance than the older participants in the three-alternative task. Young participants used more often recollection when the similarity between targets and foils was higher, unlike older participants whose rate of recollection was not influenced by target-foil similarity. Both groups used more often familiarity in the two-alternative task, but older participants demonstrated a more liberal bias. Finally, our participants used more often elimination strategies when the similarity is low or when they had to select one item out of three. [less ▲]

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See detailLa musica di fra Giovanni da Verona
Bugini, Mariaelena ULg

Scientific conference (2017, March 23)

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See detailOverview in numerical and visuo-perceptual cognition
Rousselle, Laurence ULg

Scientific conference (2017, March 23)

Detailed reference viewed: 23 (1 ULg)
See detailNégocier les discours (in)sécuritaires au quotidien: le cas du #Brusselslockdown
Wintgens, Caroline ULg

Conference (2017, March 23)

Cette communication a pour objectif d’interroger les discours sécuritaires, leur inscription dans le quotidien et leur réception par les usagers de réseaux sociaux au quotidien, à travers le cas du ... [more ▼]

Cette communication a pour objectif d’interroger les discours sécuritaires, leur inscription dans le quotidien et leur réception par les usagers de réseaux sociaux au quotidien, à travers le cas du #Brusselslockdown. Ce hashtag, apparu sur Twitter le 22 novembre 2015, a pour particularité d’avoir été inondé d’images et vidéos de chats suite à la demande des autorités belges de ne plus diffuser d’informations sur les opérations policières en cours à Bruxelles Ce cas est approché à travers la question des mises en scène (Goffman, 1973) de la sécurité et de la performativité (Butler, 2005) de celles-ci. Les discours sur la sécurité (ceux qui apparaissent dans les médias comme ceux qui apparaissent dans l’espace public) sont performatifs. La sécurité, le danger, la menace n’existent pas en soi, ils sont construits par le discours. L’Etat et ses représentants participent à cette construction, et donc à définir ce qui est sûr et ce qui est menaçant, puisque leur légitimité repose sur la promesse de maintenir la sécurité (Campbell, 1992). D’après Campbell, Il s’agit pour l’Etat d’assurer la sécurité des citoyens face à une menace qu’il contribue à construire, mais aussi de faire savoir qu’il assure cette sécurité. Reste alors aux usagers des médias, de l’espace public, à négocier avec ces mises en scène qui semblent toujours plus présentes dans le quotidien à travers les discours politiques, la presse, les réseaux sociaux ou encore l’espace public urbain. Sur les réseaux sociaux, les usagers sont invités à parler de ce quotidien. Ils participent alors eux aussi à la construction des discours sécuritaires, et donc de la définition de l’(in)sécurité. La particularité de ce qui s’est passé sur Twitter le soir du 22 novembre est que le discours sécuritaire consistait précisément à masquer celui-ci, à le rendre invisible. Mais cette injonction au silence, réappropriée et détournée (De Certeau, 1990) par les usagers de Twitter, lui a donné une visibilité particulière. A travers ce détournement, on assiste au retour du quotidien et du domestique au cœur même d’une situation exceptionnelle relative aux affaires publiques. L’action se déplace dans l’espace privé et le met en scène. Ce brouillage des frontières ne porte cependant pas sur la définition de l’(in)sécurité. Si ces discours participent à construire celle-ci, c’est finalement pour réétablir des représentations qui sont déjà bien ancrées: le domestique est sûr, l’espace public est menaçant. Sous le hashtag #BrusselsLockdown, la représentation du domestique nous protège, celle de ce qui se déroule dans l’espace public nous met en danger. [less ▲]

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See detailLight, dark and the powerd that be: a hydroelectric project in Butembo
Geenen, Kristien ULg

in Canadian Journal of African Studies (2017), 51(1), 43-54

Despite its major importance in international trade, the city of Butembo in the North Kivu province of the Democratic Republic of Congo is deprived of such basic urban infrastructure as electricity ... [more ▼]

Despite its major importance in international trade, the city of Butembo in the North Kivu province of the Democratic Republic of Congo is deprived of such basic urban infrastructure as electricity. Private and public actors have attempted to bring power to the city, but their efforts have remained fruitless. Analysis of these failed projects to electrify the city offers a glimpse of local power relations. Why, rather than cooperating, do various local power holders counteract each other? Will gaining credit for bringing electric power to the city in turn yield political power over its future? With a special focus on a hydroelectric dam that was built but never functioned, this article sheds light on the way in which the citizens of Butembo relate to different bodies of authority. I argue that the hydroelectric dam gradually became a tool in a larger political strategy [less ▲]

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See detailRelating pessimistic memory predictions to Alzheimer’s disease brain structure
Genon, Sarah ULg; Simon, Jessica ULg; Bahri, Mohamed Ali ULg et al

Poster (2017, March 23)

Patients with Alzheimer’s disease (AD) show impairment of episodic memory and related metacognitive processes. The present study examined subjective metacognitive judgments preceding objective memory ... [more ▼]

Patients with Alzheimer’s disease (AD) show impairment of episodic memory and related metacognitive processes. The present study examined subjective metacognitive judgments preceding objective memory retrieval and investigated the neural correlates of pessimistic predictions for successfully retrieved memories in AD patients. AD patients and healthy older participants provided predictive judgements on their recognition performance before retrieval of famous (semantic) and recently learned (episodic) names. Correlations between grey matter volume (GMV) in T1 images and behavioural scores were examined with multivariate (PLS) and univariate (GLM) analyses in AD patients. AD patients showed a significant proportion of successful name recognition preceded by pessimistic prediction (Prediction_low_hits) in episodic memory. PLS revealed that behavioural pattern in AD patients was related with a mainly right lateralized pattern of GMV decrease including medial temporal lobe and posterior cingulate cortex, but also right ventrolateral prefrontal cortex (VLPFC). GLM further confirmed that pessimistic prediction negatively correlated with GMV in VLPFC. Thus, impaired monitoring processes (possibly influenced by inaccurate beliefs) allowing inferences about one’s own memory performance are primarily related to decrease GMV in VLPFC in AD patients. [less ▲]

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See detailCoarsening dynamics of a granular lattice gas
Opsomer, Eric ULg; Noirhomme, Martial ULg; Ludewig, François et al

Poster (2017, March 23)

Detailed reference viewed: 21 (5 ULg)
See detailCréer des applications graphiques en Python avec PyQt5
Denis, Pierre; Cuvelier, Thibaut ULg

Book published by D-BookeR - 1st (2017)

Ce livre s'adresse à toute personne souhaitant développer des interfaces graphiques en Python, de la simple boîte de dialogue à la création d'applications graphiques élaborées, avec menus, barre d'outils ... [more ▼]

Ce livre s'adresse à toute personne souhaitant développer des interfaces graphiques en Python, de la simple boîte de dialogue à la création d'applications graphiques élaborées, avec menus, barre d'outils, redimensionnement à la taille de l'écran, accès à une base de données, etc. Il part du principe que vous connaissez Python et avez des notions en programmation orientée objet, mais que vous débutez avec Qt et la conception d'interfaces graphiques. Qt est une bibliothèque multiplateforme extrêmement complète écrite en C++. PyQt sert de couche de liaison entre ces deux mondes et apporte Qt à l'environnement Python. Ce livre s'appuie sur la version 5.6 de Qt, destinée à être maintenue sur le long terme, tout en signalant le cas échéant d'éventuelles divergences avec la version 5.7. Tous les exemples sont donc réalisés avec PyQt5. Deux approches de développement vous sont proposées : la manière impérative par assemblage de composants (aussi appelés widgets) et la manière déclarative à l'aide du langage QML (Qt Quick). Une même application de gestion de bibliothèque sera développée à titre d'exemple avec chacune des méthodes. Pour aller plus loin, vous aborderez dans une troisième partie, l'affichage 2D interactif avec des vues graphiques (dans une application Qt Widget) et différents types d'affichages avancés avec Qt Quick (Canvas, Qt3D). Eric6 a été choisi comme environnement de développement par défaut. Vous utiliserez également Qt Creator pour développer en QML. [less ▲]

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See detailL'E-sport : définition et contextualisation
Krywicki, Boris ULg

Conference given outside the academic context (2017)

Généralités et vulgarisation à propos du phénomène de "l'e-sport", le sport électronique.

Detailed reference viewed: 30 (0 ULg)
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See detailOrganocatalytic coupling of CO2 with oxetane
Alves, Margot ULg; Grignard, Bruno ULg; Boyaval, Amélie ULg et al

in ChemSusChem (2017), 10(6), 1128-1138

The organocatalytic coupling of CO2 with oxetanes is investigated under solvent-free conditions. The influence of the main reaction parameters (type of organocatalytic system, pressure and temperature) on ... [more ▼]

The organocatalytic coupling of CO2 with oxetanes is investigated under solvent-free conditions. The influence of the main reaction parameters (type of organocatalytic system, pressure and temperature) on the yield, the product formed and the selectivity of the reaction are discussed. An onium salt combined with a fluorinated alcohol promotes the efficient and selective organocatalytic synthesis of α,ω-hydroxyl oligocarbonates by coupling CO2 with oxetanes at 130 °C and at a CO2 pressure as low as 2 MPa. NMR characterizations were correlated with MALDI-ToF analyses for elucidating the structure of the oligomers. Online FTIR studies under pressure, NMR titrations and DFT calculations allowed an in-depth understanding of the reaction mechanism. Finally, CO2- based poly(carbonate-co-urethane)s were synthesized by step- growth polymerization of hydroxyl telechelic oligocarbonates with MDI. The organocatalytic system described in this paper constitutes an innovative sustainable route to the selective preparation of hydroxyl telechelic carbonates, of high interest for many applications, notably for the polyurethane business, especially for coatings or foams. [less ▲]

Detailed reference viewed: 80 (26 ULg)