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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 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 detail"888" Tweets on the Art and Science of Internet-Based Investing
Choffray, Jean-Marie ULg

E-print/Working paper (2017)

Here we are! "888" Tweets on The Art and Science of Investing to “show you the way”, to share some observations on the evolution of the world, the behavior of the financial markets, and to illustrate the ... [more ▼]

Here we are! "888" Tweets on The Art and Science of Investing to “show you the way”, to share some observations on the evolution of the world, the behavior of the financial markets, and to illustrate the key heuristics that I learned over the last twenty years. As, without any doubt, I am no Warren Buffett, feel free to disagree and develop you own “theory” of investing. Painful and solitary work... Success is at that price! And, based on what I did - and did not! - achieve, it shouldn’t be hard to do much better... That’s my wish for you! [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.

See detailThe Belgian election system
Bouhon, Frédéric ULg

Conference (2017, March 21)

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See detailTranscriptome analysis of pancreatic cells across distant species highlights novel important regulator genes.
tarifeno-Saldiva, estefania; Lavergne, Arnaud ULg; Bernard, Alice et al

in BMC Biology (2017), 15

Background Defining the transcriptome and the genetic pathways of pancreatic cells is of great interest for elucidating the molecular attributes of pancreas disorders such as diabetes and cancer. As the ... [more ▼]

Background Defining the transcriptome and the genetic pathways of pancreatic cells is of great interest for elucidating the molecular attributes of pancreas disorders such as diabetes and cancer. As the function of the different pancreatic cell types has been maintained during vertebrate evolution, the comparison of their transcriptomes across distant vertebrate species is a mean to pinpoint genes under strong evolutionary constrains due to their crucial function and which have preserved their selective expression in these pancreatic cell types. Results In this study, RNA-sequencing was performed on pancreatic alpha-, beta- and delta endocrine cells as well as the acinar and ductal exocrine cells isolated from adult zebrafish transgenic lines. Comparison of these transcriptomes identified many novel markers including transcription factors and signaling pathways components specific for each cell type. By performing interspecies comparisons, we identified hundreds of genes with conserved enriched expression in endocrine and exocrine cells among human, mouse and zebrafish. This list includes many genes known as crucial for pancreatic cell formation or function, but also pinpoints many factors whose pancreatic function is still unknown. A large set of endocrine-enriched genes can already be detected at early developmental stages as revealed by the transcriptomic profiling of embryonic endocrine cells, indicating a potential role in cell differentiation. The actual involvement of conserved endocrine genes in pancreatic cell differentiation was demonstrated in zebrafish for myt1b, whose invalidation leads to a reduction of alpha-cells, and for cdx4, selectively expressed in endocrine delta-cells and crucial for their specification. Intriguingly, comparison of the endocrine alpha- and beta-cell subtypes from human, mouse and zebrafish reveals a much lower conservation of the transcriptomic signatures for these two endocrine cell subtypes compared to the signatures of pan-endocrine and exocrine cells. These data suggest that the identity of the alpha- and beta-cells relies on a few key factors, corroborating numerous examples of inter-conversion between these two endocrine cell subtypes. Conclusion. This study highlights both evolutionary conserved and species-specific features that will help to unveil universal and fundamental regulatory pathways as well as pathways specific to human and laboratory animal models such as mouse and zebrafish. [less ▲]

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See detailSimultaneous synthesis and chemical functionalization of emulsion-templated porous polymers using nitroxide-terminated macromolecular surfactants
Mathieu, Kevin ULg; De Winter, Julien; Jérôme, Christine ULg et al

in Polymer Chemistry (2017), 8(11), 1850-1861

The design of functional 3D macroporous monoliths has become a necessity for a wide range of applications. Traditional post-modification strategies of porous materials are efficient but often consist in ... [more ▼]

The design of functional 3D macroporous monoliths has become a necessity for a wide range of applications. Traditional post-modification strategies of porous materials are efficient but often consist in tedious multi-steps processes. This work describes a straightforward macromolecular surfactant-assisted method for producing chemically functionalized macroporous polyHIPEs with interconnected structures. Accordingly, high internal phase emulsion-templated polymerizations were implemented in the presence of SG1-terminated amphiphilic copolymers prepared by nitroxide- mediated radical polymerization (NMP). The latter served as both stabilizers and functionalizing agents upon thermal activation of its terminal alkoxyamine and covalent anchoring of the released radical copolymer onto the walls of the scaffold. The effect of the polymerization temperature on the functionalization and openness of the final porous materials was explored. As a result, a range of open-cell styrene and acrylate-based polyHIPEs chemically grafted with PEO were obtained. Moreover, polyHIPEs were also decorated with alkyne-bearing PEO and subsequently modified via CuAAc click chemistry in order to demonstrate the potential of this macromolecular surfactants-assisted functionalization method. [less ▲]

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See detailL'extrême droite et le populisme en Europe
Debras, François ULg

Scientific conference (2017, March 21)

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See detailInfluence of granular fraction and origin of recycled concrete aggregates on their properties
Zhao, Zengfeng ULg; Courard, Luc ULg; Michel, Frédéric ULg et al

in European Journal of Environmental and Civil Engineering (2017)

Large quantities of construction and demolition wastes are produced each year. In order to make good use of recycled concrete aggregates (RCA) in concrete, it is very important to study the influence of ... [more ▼]

Large quantities of construction and demolition wastes are produced each year. In order to make good use of recycled concrete aggregates (RCA) in concrete, it is very important to study the influence of the granular fraction and the origin of RCA on their properties. In this study, RCA from industrial produced blocks (RCA_Blocks) and slabs (RCA_Slabs) were crushed and then separated into four granular fractions (0/2, 2/6.3, 6.3/14, 14/20 mm). Each granular fraction of RCA was physically characterised. Real RCA from recycling plant were also used for comparison. The results showed that recycled sands offered significantly higher cement paste content (higher bound water content) than coarse recycled aggregates. The fine RCA had therefore a higher water absorption coefficient compared to coarser fractions of RCA. The water absorption of finer fraction of RCA could be extrapolated precisely from the relationship between water absorption and cement paste content (or bound water content) of three coarse fractions of RCA. The values of hardened cement paste content obtained for the RCA_Blocks were lower than those measured on the RCA_Slabs, which was due to a smaller amount of initial cement paste content in blocks. The results showed that RCA_Slabs were more angular than RCA_Blocks. [less ▲]

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See detailConférence-débat avec le Raoul Collectif
Cormann, Grégory ULg; Hamers, Jérémy ULg

Conference given outside the academic context (2017)

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See detailLichtenstein procedure under local anaesthesia
DETRY, Olivier ULg

Conference (2017, March 18)

LICHTENSTEIN REPAIR UNDER LOCAL ANAESTHESIA Pr Olivier Detry, Dpt of Abdominal Surgery and Transplantation, CHU Liège, Liège, Belgium. Email: oli.detry@chu.ulg.ac.be Despite many studies confirming the ... [more ▼]

LICHTENSTEIN REPAIR UNDER LOCAL ANAESTHESIA Pr Olivier Detry, Dpt of Abdominal Surgery and Transplantation, CHU Liège, Liège, Belgium. Email: oli.detry@chu.ulg.ac.be Despite many studies confirming the feasibility and the interest of local anaesthesia for inguinal hernia repair [1-3], its use is not generalized amongst abdominal surgeons. The advantages of local anaesthesia are indeed clear, including reduced costs, reduced hospital stay and reduced post operative pain. The success of the procedure depends on the skills and the motivation of the surgeon, of the nursing teams, and of the patient him/herself. Perfect knowledge of the surgical technique and of the regional nerve anatomy is required. The Lichtenstein repair may be easily performed under local anaesthesia, but should be proposed in the early experience to non-obese patients suffering from limited inguinal hernia. It can even be performed by surgical residents [4]. Practically, local anaesthesia requires some patience and quiet in the operative room. Operators should be aware that the action of local anaesthesia is delayed after injection. Local anaesthetics should be buffered [5] and at body temperature at time of injection. Local anaesthetics containing Adrenalin allow longer pain control, with limitation of bleeding and less toxicity. Large and brutal movements should be avoided. Transversus abdominis plane (TAP) block can also be proposed [6]. The surgical and anaesthetic techniques for inguinal hernia repair should be tailored to the specific characteristics of the hernia and of the patient. There is no method of choice that might fit for every patient. References [1] van Veen RN, Mahabier C, Dawson I, Hop WC, Kok NF, Lange JF, et al. Spinal or local anesthesia in lichtenstein hernia repair: a randomized controlled trial. Ann Surg 2008;247:428-433. [2] Verstraete L, Becaus N, Swannet H, Ceelen W, Duchateau L, Speybroeck N. Long term outcome after lichtenstein hernia repair using general, locoregional or local anaesthesia. Acta Chir Belg 2015;115:136-141. [3] Dhankhar DS, Sharma N, Mishra T, Kaur N, Singh S, Gupta S. Totally extraperitoneal repair under general anesthesia versus Lichtenstein repair under local anesthesia for unilateral inguinal hernia: a prospective randomized controlled trial. Surg Endosc 2014;28:996-1002. [4] Paajanen H, Varjo R. Ten-year audit of Lichtenstein hernioplasty under local anaesthesia performed by surgical residents. BMC Surg 2010;10:24. [5] Ball EL, Sanjay P, Woodward A. Comparison of buffered and unbuffered local anaesthesia for inguinal hernia repair: a prospective study. Hernia : the journal of hernias and abdominal wall surgery 2006;10:175-178. [6] Milone M, Di Minno MN, Musella M, Maietta P, Salvatore G, Iacovazzo C, et al. Outpatient inguinal hernia repair under local anaesthesia: feasibility and efficacy of ultrasound-guided transversus abdominis plane block. Hernia : the journal of hernias and abdominal wall surgery 2013;17:749-755. [less ▲]

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See detailApprentissage et mémoire chez l'enfant et l'adulte trisomique 21
Comblain, Annick ULg

Conference (2017, March 17)

Si le profil langagier des personnes trisomiques 21 est de mieux en mieux connu et décrit, certains aspects du développement et du fonctionnement cognitif des personnes atteintes demeurent encore peu ... [more ▼]

Si le profil langagier des personnes trisomiques 21 est de mieux en mieux connu et décrit, certains aspects du développement et du fonctionnement cognitif des personnes atteintes demeurent encore peu étudiés. Ainsi, les conséquences de la présence d’un chromosome surnuméraire dans leur patrimoine génétique, sur des domaines tels que le développement mnésique, les apprentissages académiques (lecture et arithmétique) ou la problématique du vieillissement cognitif restent peu étudiés et encore sujets à controverse. Même si depuis plusieurs décennies, on sait que la mémoire à court terme verbale des personnes trisomiques 21 est déficitaire, son fonctionnement exact et les conséquences de ce déficit sur le développement d’autres domaines comme le langage oral et la lecture restent relativement peu explorés en regard des nombreuses études descriptives sur les déficits observés dans la maîtrise langage oral. A l'heure ou l'inclusion des personnes atteintes d'une déficience intellectuelle devient une pratique de plus en plus courante et recommandée, il semble essentiel d'approfondir notre connaissance du développement cognitif de ces personnes de manière à mettre en place des moyens adaptés au sein des classes et de potentialiser apprentissages. Par ailleurs, la problématique du vieillissement et plus particulièrement de l’incidence de la maladie d’Alzheimer est devenue, de par l’espérance de vie accrue des personnes trisomiques 21, un sujet de recherche de plus en plus développé. [less ▲]

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See detailMusique et plaisanterie. Ethnographie de trois groupes sociaux (coolooji, ñeeñɓe et mbiruuji) à Djéwol (Mauritanie)
Sow, Aboubakry ULg

Doctoral thesis (2017)

The village of Djéwol (Mauritania) is located on the right bank of the Sénégal river and its' population is estimated to approximately 9000 inhabitants that are split to two communities, the Haalpulaar ... [more ▼]

The village of Djéwol (Mauritania) is located on the right bank of the Sénégal river and its' population is estimated to approximately 9000 inhabitants that are split to two communities, the Haalpulaar and the Soninké who are organinized into hierarchies. Straddling on both communities are the ñeeñɓe (social mediators) and the riimayɓe (servants), who are the main producers and actors of music. Although sometimes they declare themselves to be Haalpulaar, other times, they call themselves Soninké, mainly because of bilingualism and versatility of their music. For this reason, the ñeeñɓe and riimayɓe are conveyed to all manifestations and festivities that punctuate the life of the village. On such occasions, other genres of music are also played by coolooji (social protesters) and the mbiruuji (fighters), both of these being marginal subclasses who are constantly in conflict with the ñeeñɓe. Based on my position of researcher/musian/haalpulaar/dimo (noble) originating from this village and on my personal journey, while using a reflexive method, I will question the rôle and the place in the society of the three actors previously mentioned : The coolooji, the ñeeñɓe and the mbiruuji. Starting with an ethnological description and an anthropological analysis of the different operating modes of yano (pleasantry procedure) – which allow the denɗiraagal (similar to pleasantry) to be set into motion or not – in their articulation of music, it will be a matter of asking ourselves in which way the the coolooji, the ñeeñɓe and the mbiruuji define themselves and contribute to defining others through yano and music. Thus, the first part of this thesis suggests, beyond the presentation of the historical and social context of the community and Djéwol village, adopting a synoptic perspective on the Haalpulaar and Soninké music of the region near the Sénégal river. The second part, however, will focus on the origin of the different types of relations in jiidugal (kin) and of denɗiraagal (related of pleasantry) which proceed by using the yano, as well as the musical art associated with the later. Finally, the last part will be dedicated to analyzing the interactions, conflicting or not, as well as the absence of interactions between the coolooji, the ñeeñɓe and the mbiruuji while highlighting the similarities and the differences between these three significant figures. In conclusion, the situation will be analyzed in the light of the contemporary reconfigurations and of the evolution of the bounds tied between the denɗiraagal and the surrounding social networks. Le village de Djéwol (Mauritanie) se situe sur la rive droite du fleuve Sénégal et compte aujourd’hui 9000 habitants se répartissant en deux communautés, haalpulaar et soninké, fortement hiérarchisées en leur sein. À cheval sur les deux communautés, se trouvent les ñeeñɓe (médiateurs sociaux) et les riimayɓe (serviteurs) qui sont les principaux producteurs et acteurs de musique. Ceux-ci se déclarent tantôt haalpulaar tantôt soninké, notamment en raison de leur bilinguisme et de la polyvalence de leurs musiques. À ce titre, les ñeeñɓe et les riimayɓe sont conviés à toutes les manifestations et festivités qui rythment la vie du village. En ces occasions, d’autres genres de musiques sont également pratiqués par les coolooji (contestataires sociaux) et les mbiruuji (lutteurs), deux « sous-groupes marginaux » qui sont constamment en conflit avec les ñeeñɓe. En m’appuyant, de manière réflexive, sur ma position de chercheur/musicien/haalpulaar/dimo (noble) originaire du village et sur mon parcours, j’interrogerai le rôle et la place dans la société de trois des acteurs mentionnés : les coolooji, les ñeeñɓe et les mbiruuji. À partir de la description ethnographique et de l’analyse anthropologique des divers modes opératoires du yano (procédé de plaisanterie) – qui permettent d’activer ou de désactiver le denɗiraagal, parenté à plaisanterie – dans leur articulation avec la musique, il s’agira de se demander de quelle manière les coolooji, les ñeeñɓe et les mbiruuji se définissent et contribuent à définir autrui à travers le yano et la musique. Ainsi, la première partie de cette thèse proposera, au-delà de la présentation du contexte historique et social de la commune et du village de Djéwol, un regard synoptique sur les musiques haalpulaar et soninké de la région du fleuve Sénégal. La deuxième partie s’intéressera quant à elle à l’origine des différents types de parenté jiidugal (parenté) et de denɗiraagal (parenté à plaisanterie) procédant par le yano, ainsi qu’à l’art musical associé à ce dernier. Enfin, la dernière partie, consacrée à l’analyse des interactions, conflictuelles ou non, et de l’absence d’interactions entre les coolooji, les ñeeñɓe, et les mbiruuji, mettra en évidence les similitudes et les différences entre ces trois figures. La situation sera finalement analysée à la lumière des reconfigurations contemporaines et de l’évolution des liens de denɗiraagal sur les réseaux sociaux. [less ▲]

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See detailPrésentation du projet de thèse : Performance des entreprises et ressources territoriales multi-échelles en Belgique et Wallonie
Wilmotte, Pierre-François ULg

Conference (2017, March 16)

Présentation du projet doctoral dans le cadre du séminaire des doctorants de l'ASRDLF. L'objectif est de présenter le projet mais aussi de mettre en avant les difficultés éventuelles pour recueillir des ... [more ▼]

Présentation du projet doctoral dans le cadre du séminaire des doctorants de l'ASRDLF. L'objectif est de présenter le projet mais aussi de mettre en avant les difficultés éventuelles pour recueillir des conseils et suggestions de doctorants ou d'enseignants-chercheurs. Le projet a été présenté avec les éléments suivants : contexte, questions de recherche, méthodologie, premiers résultats et éléments attendus. [less ▲]

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