References of "Scientific congresses and symposiums"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailSPATIODATA, un modèle de bâtiment non-constructif, collaboratif et multi-usage
Delfosse, Vincent ULg; Boulanger, Christelle ULg; Jeunejean, Aurélie ULg et al

in Actes du 6ème Séminaire de Conception Architecturale Numérique (2014, June 19)

There is an increasing number of mobile applications supporting specific activities related to the indoor building environment. SpatioData is a research project aiming at the development of a ... [more ▼]

There is an increasing number of mobile applications supporting specific activities related to the indoor building environment. SpatioData is a research project aiming at the development of a collaborative platform for the effective sharing of building-related data and supporting a wide range of different activities. This paper discusses the specific data model at the heart of the project. A comparison with the traditional BIM models is given in order to motivate the choices made in this project. [less ▲]

Detailed reference viewed: 14 (6 ULg)
Peer Reviewed
See detailUn panorama du temps. Robida chroniqueur des Expositions universelles
Stienon, Valérie ULg

Conference (2014, June 19)

Robida est familier des Expositions universelles. Sa carrière de dessinateur-journaliste est en grande partie rythmée par les événements sociaux qu’elles constituent. Il illustre le démontage de ... [more ▼]

Robida est familier des Expositions universelles. Sa carrière de dessinateur-journaliste est en grande partie rythmée par les événements sociaux qu’elles constituent. Il illustre le démontage de l’Exposition de Paris de 1867 dans le Journal Amusant du 9 novembre 1867. Il est envoyé à Vienne comme dessinateur-correspondant du Monde illustré pour celle de 1873. Il visite l’Exposition de 1889 et en rend compte en double-page dans La Vie Parisienne du 11 mai 1889 (« Demandez, l’inauguration officielle de la Tour ! »). Enfin, il participe activement à l’Exposition de 1900 avec la reconstitution minutieuse, pendant près de deux ans, du « Vieux Paris », une attraction à succès située entre le Pont de l’Alma et la passerelle Debilly. En tant que manifestation très fréquentée, qui fait l’objet d’une abondante publicité et qui engage l’image d’une ville à dimension internationale, l’exposition dans ses diverses formes (universelle, internationale, industrielle) constitue un nouveau mode de communication et un lieu de sociabilité spécifique dans la seconde moitié du XIXe siècle. Le chroniqueur, le journaliste et le dessinateur sont amenés à commenter et à représenter ce type d’événement célébratif qui implique tout à la fois une esthétique de la monstration, une rhétorique publicitaire et une réflexivité patrimoniale sur le siècle. Lieu de présentation de l’innovation, animé par un imaginaire du progrès technique et industriel, l’exposition a pu ainsi constituer une matrice féconde pour l’œuvre d’anticipation de Robida. Cette communication propose d’examiner ce que la production de Robida doit aux discours et aux représentations liés aux Expositions universelles dans les deux décennies de 1880 et 1890. Des thématisations explicites, des visites fictives en mots et en images, ainsi qu’un abondant intertexte d’actualité témoignent de ce rapport à un discours social qui traverse une œuvre conjecturale ambiguë. Si les liens thématiques du Vingtième Siècle à l’Exposition Internationale d’Électricité de 1881 sont bien connus, il faut aussi envisager les aspects de la production de Robida qui impliquent le support journalistique. C’est le cas des dessins de presse qui préparent de manière critique la réception des Expositions, comme le montre la couverture de La Caricature du 16 juin 1886 faisant, trois ans à l’avance, l’éloge paradoxal du projet de métro aérien coupable d’encombrer le ciel parisien. C’est aussi le cas des inventions moquées dans sa correspondance fictive avec le dessinateur Christophe entre 1896 et 1901 dans « La Boîte aux lettres » du Petit Français illustré, où Robida-Théodule Asenbrouck imagine des machines telles que la « pince-scie-brosse-polissoir électrique » pour découper la Lune en douze tranches afin d’éclairer les grandes capitales, en particulier la Ville-Lumière. L’Exposition constitue également un cadre de transposition fictive créatif, comme en témoigne le récit sériel Jadis chez aujourd’hui du Petit Français illustré, imaginant Louis XIV et sa cour transportés à l’Exposition universelle de 1889 et visitant la Galerie des Machines avec un regard décalé sur l’époque contemporaine. Des éléments graphiques et stylistiques récurrents résultent de ce commentaire journalistique des Expositions, à l’image d’une tour Eiffel dont un seul pied suffit à constituer un indicateur chrono-topographique symbolisant la modernité contestée. Enfin, on peut considérer comment Robida prolonge à sa manière des inventions existantes, notamment dans l’illustration du texte d’Octave Uzanne La Locomotion future, paru dans Le Monde Moderne en 1895, ou avec la voiture aéroplane déclinée à partir du quadricycle Daimler apparu à l’Exposition de 1889. Le dialogue attentif et moqueur de Robida avec les projets et les discours des Expositions universelles permet de reconsidérer l’humour de l’anticipateur en le situant plus résolument dans les registres satirique et fantaisiste propres à prendre en charge les facéties du « feu congelé », du « poney-vapeur » ou du « perce-brouillard à hélice nasale », que dans la seule prospective pessimiste d’un génial visionnaire. Cet angle d’étude de l’œuvre d’anticipation offre aussi l’occasion d’examiner la part de l’intertexte d’actualité intervenant dans une pratique générique, graphique et éditoriale du panorama temporel. Entendons par là la littérature des guides pour visiteurs d’Expositions qui renoue avec une tradition des Petits-Paris initiée dans la littérature « panoramique » des années 1840. Ces parcours-découvertes balisés et ces bilans des curiosités urbaines ne sont pas sans évoquer ceux auxquels contribue Robida dans Le Vieux Paris. Guide historique, pittoresque et anecdotique (une cinquantaine de dessins), dans l’illustration du guide satirique L’Exposition comique (Dentu, 1889) ou encore dans le récit illustré du Dix-neuvième Siècle. S’ils s’articulent à un passé patrimonial sous la forme d’un inventaire du siècle qui se regarde réflexivement, ils ont aussi pu contribuer à l’anticipation en associant scènes dynamiques et vues d’ensemble dans un parcours temporel indissociable de ses dimensions topographiques. [less ▲]

Detailed reference viewed: 7 (1 ULg)
Peer Reviewed
See detailContribution of ion mobility for structural analysis and analytical chemistry: Use of selective IMS shift reagents (SSR)
Kune, Christopher ULg; Far, Johann ULg; Delvaux, Cédric ULg et al

Poster (2014, June 19)

Ion mobility is a gas phase separation technique based on the Collisional Cross Section (CCS) of ions. It discriminates isobaric and isomeric ions provided their CCS difference is larger than the ... [more ▼]

Ion mobility is a gas phase separation technique based on the Collisional Cross Section (CCS) of ions. It discriminates isobaric and isomeric ions provided their CCS difference is larger than the instrumental resolution. This work proposes a new method to overcome this limitation while providing additional structural information. A Selective Shift Reagent (SSR) is a ligand specifically modifying the CCS of ions. Indeed specific non-covalent complexes can be form with a suitable SSR to reach the required selectivity and the CCS induced shift. A CID dissociation of the complex may be used after IMS separation to produce specific MS/MS spectra of the targeted analyte. This concept paves the way for new analytical strategies by ion mobility based on non-covalent complex formation. [less ▲]

Detailed reference viewed: 43 (10 ULg)
Full Text
Peer Reviewed
See detailLes univers vidéoludiques : des fictions mobiles et jouables
Barnabé, Fanny ULg

Poster (2014, June 18)

La question de la fiction constitue, depuis le début des années 2000, une clef d’entrée privilégiée pour étudier le médium vidéoludique. La capacité du jeu vidéo à prendre en charge la représentation ... [more ▼]

La question de la fiction constitue, depuis le début des années 2000, une clef d’entrée privilégiée pour étudier le médium vidéoludique. La capacité du jeu vidéo à prendre en charge la représentation d’une histoire par ses propres moyens (et non en empruntant ceux de la littérature ou du cinéma) a été tantôt affirmée (Ryan, 2003 ; Murray, 1998), tantôt contestée (Frasca, 1999 ; Juul, 2001 ; Eskelinen, 2001). Dès lors – même si les oppositions à son sujet sont aujourd’hui plus nuancées – elle demeure un objet problématique dont le traitement entraîne souvent d’importants détours théoriques. Les concepts de la narratologie « traditionnelle » (tels que celui d’un récit clos et prédéfini ou d’une narration « unidirectionnelle ») semblent a priori peu compatibles avec les impératifs d’interaction et de jouabilité qui sont au cœur de l’expérience vidéoludique. Quels outils adopter, en conséquence, pour décrire ce qui advient de la fiction lorsqu’elle est prise en charge par le jeu ? C’est à cette question que nous tâcherons de répondre en définissant les contours d’une notion souvent évoquée par la recherche, mais peu théorisée : celle d’« univers fictionnel ». Pour ce faire, nous nous nourrirons tant des avancées des games studies et des « play studies » (Triclot, 2011) que des théories de la fiction (Schaeffer, 1999) et de ses modes actuels de consommation par les amateurs (Jenkins, 2006). La distinction opérée par Amato (2005) entre les notions de cosmos, de diégèse et de ludiégèse permettra également de préciser la définition de ce qu’est un univers lorsqu’il est régi par le jeu. En effet, la narrativité propre au jeu vidéo ne semble pas répondre à la logique linéaire du récit : une grande part de l’histoire n’est généralement présente que de manière « latente » (Letourneux, 2005) dans une série d’éléments hétérogènes (le texte, l’interface, les décors, les sons, les objets…), situés à différents niveaux de l’œuvre et dont le sens narratif peut ou non être activé par le joueur (Guardiola, 2005 parle, à ce titre, de la dimension « permissive » du jeu vidéo). Pour décrire cette pluri-dimensionnalité et cette dispersion de l’histoire au sein d’« éléments de narrativisation » (Genvo, 2002), la notion de récit apparaît comme réductrice. À l’inverse, celle d’univers (définie dès lors comme un agencement d’éléments non hiérarchisés et éventuellement porteurs d’une narrativité latente) présente une forte opérationnalité, due principalement à deux de ses caractéristiques : son ouverture et sa nature modulable. Son ouverture, tout d’abord, car elle permet non seulement de prendre en compte l’ensemble des composantes de la fiction qui sont internes à l’œuvre vidéoludique, mais aussi celles qui lui sont externes (qu’il s’agisse du paratexte, des livrets des jeux, des bandes annonces,… ou encore de véritables développements narratifs autonomes, réalisés sur différents médias). Sa malléabilité, ensuite, car le concept d’univers, contrairement à celui de narration, admet l’interactivité : c’est le joueur qui actualise le récit (il participe à son énonciation) et qui, par la continuité de sa présence, organise les « éléments de narrativisation » en une configuration cohérente. En outre, concevoir la fiction comme un agencement de diverses composantes permet d’envisager les constantes évolutions que lui font subir les communautés d’amateurs : ceux-ci, en confrontant leurs représentations, développent par exemple des modèles collectifs « non officiels » (les « fanons » ; voir Hellekson et Busse, 2006) qui ont un impact certain sur la vie des fictions. L’univers fictionnel constitue, en somme, un outil théorique porteur qui rend possible la description des points de passage entre jeu et fiction et l’évaluation des contraintes que l’un exerce sur l’autre. Toutefois, bien qu’il ait initialement été élaboré pour correspondre au domaine spécifique du jeu vidéo, le concept semble déborder de ces premiers questionnements et s’adapter, plus généralement, à l’étude des modes actuels de production et de consommation de la fiction. En effet, son ouverture invite, d’une part, à élargir la conception traditionnelle de la narration et à l’envisager comme un ensemble transmédiatique. D’autre part, sa nature d’agencement n’est pas sans rappeler les théories d’Azuma (2008) selon lesquelles les fictions postmodernes ne sont plus considérées comme des unités finies et fermées, mais comme des agencements qui puisent dans un fonds commun, une « base de données » perpétuellement renouvelée. Chaque élément investi par la fiction intègre ce fonds commun et devient alors susceptible de connaître des continuations, des réappropriations, des réagencements. Les histoires conçues sur ce mode ne sont pas lues, mais vécues et explorées : la lecture devient une expérience et une expérimentation. [less ▲]

Detailed reference viewed: 13 (1 ULg)
Full Text
Peer Reviewed
See detailLes approches sémiotiques du portrait photographique. De l’identité à l’“air”
Dondero, Maria Giulia ULg

in COnTEXTES : Revue de Sociologie de la Littérature (2014, June 18), 14

L’objectif de cet article est d’abord méthodologique : il entend déployer les instruments de l’analyse sémiotique, et notamment énonciative et temporelle, des images photographiques. Ensuite, il vise à ... [more ▼]

L’objectif de cet article est d’abord méthodologique : il entend déployer les instruments de l’analyse sémiotique, et notamment énonciative et temporelle, des images photographiques. Ensuite, il vise à esquisser la spécificité du genre du portrait et à interroger l’identification de caractéristiques singularisant le portrait d’écrivain. [less ▲]

Detailed reference viewed: 9 (0 ULg)
Full Text
Peer Reviewed
See detailThe search for a core functionality network in chondrocyte differentiation using heuristic and genetic algorithms
Kerkhofs, Johan ULg

Conference (2014, June 18)

Introduction: In the growth plate a continuing process where cartilage is replaced by bone provides the fuel for bone growth until its closure towards the end of puberty. At the cellular level the growth ... [more ▼]

Introduction: In the growth plate a continuing process where cartilage is replaced by bone provides the fuel for bone growth until its closure towards the end of puberty. At the cellular level the growth rate is maintained by proliferation and enlargement of maturing cells (hypertrophy). Mature cartilage cells (hypertrophic chondrocytes) secrete Ihh, a growth factor that induces expression of PTHrP, another growth factor, in immature proliferating chondrocytes. Since PTHrP in turn inhibits chondrocyte maturation, Ihh secretion limits the number of maturing chondrocytes through a negative feedback loop, striking a balance between proliferation and hypertrophy [Kronenberg, 2003]. Materials and methods: A gene network centering on the control of Ihh, PTHrP and transcription factors Sox9 and Runx2, which are the master regulators of early and late chondrocyte differentiation respectively, was manually constructed from literature. The dynamics of this network are simulated in a discrete framework that divides reactions into two speed classes. In this framework all interactions are considered additive, and each interaction is associated with a weight. Starting from the observation that the gene network must activate Runx2 in the presence of Ihh and Sox9 in the presence of Ihh and PTHrP, we investigate which edges are vital in achieving this. To this end, we employ both a heuristic and a genetic algorithm where the weights attached to the edges function as variables. In the heuristic algorithm weights are uniformly distributed in [0,1] and the means (based on 450 samples) of the weights that satisfy the above mentioned observations are contrasted with those that do not. If the difference of the means passes a certain threshold, the weight of the corresponding edge is fixed at 1. Results and discussion: Preliminary results from the heuristic algorithm show that fixing 14 weights (out of 147) is sufficient to match the biological observations in about 22% of cases, all other weights being selected randomly. The selected edges show that the BMP pathway is crucial in effecting a switch between hypertrophy in the absence of PTHrP and proliferation in its presence. This observation can be substantiated by earlier findings that BMP signalling plays a crucial role in prehypertrophic cells that are on the verge of hypertrophy [Yoon, 2006]. References: Kronenberg, 2003, Nature, 423:332-336; Yoon et al., 2006, Development, 133:4667-4678. [less ▲]

Detailed reference viewed: 6 (0 ULg)
Full Text
See detailThe potentiality of PDMAEMA-based polycation for cardiovascular applications
Flebus, Luca ULg; Lombart, François ULg; Martinez, Lucia et al

Conference (2014, June 18)

Detailed reference viewed: 8 (0 ULg)
Peer Reviewed
See detailAdolescent male sexual offenders: pubertal timing, psychosocial functioning and sexual abuse: what links?
Glowacz, Fabienne ULg

Conference (2014, June 17)

The impact of pubertal development on the psychological and social functioning of the teenager arouses a particular interest; the most recent research shows the existence of complex relationships between ... [more ▼]

The impact of pubertal development on the psychological and social functioning of the teenager arouses a particular interest; the most recent research shows the existence of complex relationships between pubertal development and the manifestation of internalized and externalized disorders. According to a biosocial model, biological and social factors interact in their influence on sexual behavior. A number of studies have shown that sexual activity is associated with pubertal timing. Our study is interested specifically in the links between sexual activity (and sexual abuse) during adolescence and pubertal maturation in a population of juvenile sexual offenders aged between 12 and 18 years. We measured the pubertal variable starting from the perceived pubertal timing (PPT), which evaluates the teenagers' perception of their pubertal maturation, compared with that of their peers, to understand its impact on various dimensions of the functioning of teenagers: the perception of self , aggressiveness, association with peers, self-revealed delinquency and sexual offenses. Two predominant hypothesis are used for explain influence of pubertal timing on sexual offense: the maturational deviance hypothesis and the early timing hypothesis. Our results confirm the importance of integrating the puberty variable into research on adolescent male sexual offenders, but also at the level of intervention. [less ▲]

Detailed reference viewed: 7 (0 ULg)
Full Text
Peer Reviewed
See detailPrior light history impacts on higher order cognitive brain function
Chellappa, Sarah Laxhmi ULg; Ly, Julien; Meyer, Christelle ULg et al

Conference (2014, June 17)

Detailed reference viewed: 16 (1 ULg)
Full Text
See detailAssessment of Solvent Degradation within a Global Process Model of Post-Combustion CO2 Capture
Léonard, Grégoire ULg; Heyen, Georges ULg; Toye, Dominique ULg

Conference (2014, June 17)

Solvent degradation may be a major drawback for the large-scale implementation of post-combustion CO2 capture due to amine consumption and emission of degradation products. However, its influence on the ... [more ▼]

Solvent degradation may be a major drawback for the large-scale implementation of post-combustion CO2 capture due to amine consumption and emission of degradation products. However, its influence on the process operations has rarely been studied. In the present work, a kinetics model describing solvent oxidative and thermal degradation has been developed based on own experimental results for the benchmark solvent, i.e. 30 wt% monoethanolamine (MEA) in water. This model has been included into a global Aspen Plus model of the CO2 capture process. The selected process modelling approaches are described in the present work. Using the resulting simulation model, optimal operating conditions can be identified to minimize both the energy requirement and the solvent degradation in the process. This kind of process model assessing solvent degradation may contribute to the design of large-scale CO2 capture plants to consider not only the process energy penalty, but also its environmental penalty. Indeed, both aspects are relevant for the large-scale deployment of the CO2 capture technology. [less ▲]

Detailed reference viewed: 20 (1 ULg)
Full Text
Peer Reviewed
See detailThe circadian system sets the temporal organization of basic human neuronal function
Chellappa, Sarah Laxhmi ULg; Ly, Julien; Gaggioni, Giulia et al

Conference (2014, June 16)

Detailed reference viewed: 15 (3 ULg)
Full Text
See detailDétermination de la teneur en équol dans les laits commercialisés en Wallonie (Belgique)
Daems, Frédéric ULg; Jasselette, Christophe; Franckson, Delphine et al

Poster (2014, June 13)

Detailed reference viewed: 7 (0 ULg)
Peer Reviewed
See detailMeasuring the body, measuring through the body
Vangeebergen, Thomas ULg

Conference (2014, June 13)

Body is a particular relevant way to tackle design processes, because of the multiplicity of status it can acquire during these processes: a source of information, a target to fit, a device to perform, a ... [more ▼]

Body is a particular relevant way to tackle design processes, because of the multiplicity of status it can acquire during these processes: a source of information, a target to fit, a device to perform, a complex technology, an apparatus for the users. A specific body is presented in this paper: the measured body. Trough racial anthropology, sport performances, demographic statistics, medical treatments, psycho-cognitive surveys, quantified self, or in many other contexts, human body is subject to a wide range of various measures. I would on my own propose some thoughts grounded on field exploration, concerning sensory analysis practices, in various laboratories. According to the symmetrical glaze STS have gave from the beginning to both human and non-humans, objects and subjects, the body is for a start itself one of the “stuffs” overlapping categories, blurring distinctions between things and persons, at the same a time a given and an object to perform. The measures of the body, and made with/through the body, highlight how it could be enacted, revealed, understood, improved by technology, especially when it requires some quantitative data. But it allows us also to grasp how the body is viewed simultaneously as a technological device and as the data origin, to intervene during complex practices (e.g. standardization, lab experiments, and marketing surveys). One of the numerous outcomes of such research could be the role of these bodily measurements in the definition of the actors, as well individuals than collectives. By the way it takes on a share on the network tying body to numerical data and to materiality-other-than-human, to measure the body/ through the body seems to afford socio-materiality in a particularly productive manner. Many scholars have inquired about numbers, how they could bring objectivity, how they produce confidence and security, and how finally they participate to black-box the measures themselves. Here, the aim is to understand the specificity of the body as measurement issue, being the interface of the-objects-to-be-measured and the instrument-of-measure. [less ▲]

Detailed reference viewed: 27 (4 ULg)
Full Text
Peer Reviewed
See detailThe Discretionary Use of Strasbourg Jurisprudence by the International Criminal Court
Deprez, Christophe ULg

Conference (2014, June 13)

Although the case law of the European Court of Human Rights ("ECtHR") has had and still shows critical influence on the development of the practice of the International Criminal Court ("ICC"), it remains ... [more ▼]

Although the case law of the European Court of Human Rights ("ECtHR") has had and still shows critical influence on the development of the practice of the International Criminal Court ("ICC"), it remains unclear what the authority of such external jurisprudence is vis-à-vis the international criminal judge. While it is virtually undisputed that human rights law, in general terms, is applicable to proceedings before the ICC, many scholars tend to adopt a much nuanced approach to the authority of human rights case law in particular. This paper aims to shed further light on the issue by addressing the question whether ICC judges have used Strasbourg jurisprudence in a consistent manner, in particular as regards the authority which they decided to vest the latter with. It demonstrates that ICC Chambers have relied on European human rights practice, alternatively, as a mere source of inspiration, as binding interpretation, as a corpus having ambivalent authority, or as a source whose legal value it simply left unspecified. This leads us to conclude that, on the whole, the ICC has been mostly inconsistent regarding the value of ECtHR case law in the context of international criminal proceedings. Such inconsistency, we argue, amounts to a discretionary use of Strasbourg jurisprudence that further reinforces the Court's paradoxical position as the ultimate authority for defining the boundaries of its own human rights constraint. [less ▲]

Detailed reference viewed: 8 (1 ULg)
Peer Reviewed
See detailCompeting One-Way Essential Complements : the Forgotten Side of the Net Neutrality Story}
Broos, Sébastien ULg; Gautier, Axel ULg

Conference (2014, June 12)

We examine the incentives of an internet service provider (ISP) to break net neutrality by excluding internet applications competing with its own products, a typical example being the exclusion of VoIP ... [more ▼]

We examine the incentives of an internet service provider (ISP) to break net neutrality by excluding internet applications competing with its own products, a typical example being the exclusion of VoIP applications by a telecom company offering internet and voice services. We show that exclusion is not a concern when the ISP is a monopoly because it can extract the additional surplus created by the application through price rebalancing. By contrast, when ISP’s compete, in an attempt to differentiate, only one ISP will offer the app. Applying a no-exclusion rule in this case can lead to monopoly. [less ▲]

Detailed reference viewed: 7 (0 ULg)
Full Text
Peer Reviewed
See detailExperimental tests and numerical modelling on eight slender steel columns under increasing temperatures
Franssen, Jean-Marc ULg; Zhao, Bin; Gernay, Thomas ULg

in Li, G.Q.; Jiang, S.C.; Chen, Suwen (Eds.) et al Progress on Safety of Structures in Fire (2014, June 11)

In order to fill the lack of knowledge about slender elements behavior at elevated temperatures,, a European research project called FIDESC4 has been funded by the RFCS. This project involves experimental ... [more ▼]

In order to fill the lack of knowledge about slender elements behavior at elevated temperatures,, a European research project called FIDESC4 has been funded by the RFCS. This project involves experimental testing, parametric numerical analyses and development of simple design rules. The present paper reports the characteristics and the results of the FIDESC4 experimental test campaign performed at the University of Liege on slender steel columns at elevated temperatures. A total of eight columns have been tested, all of them with I shape section. Six columns were made of welded sections (some prismatic and some tapered members) and two columns were with hot rolled sections. The nominal length of the columns was 3 meters with the whole length being heated. The strength of the material (webs and flanges) was measured on sample before the tests. The order of magnitude of the initial geometrical imperfections was recorded. The columns were not restrained against longitudinal thermal elongation. The supports at the ends were cylindrical thus inducing a restrain against rotation in one plane while allowing rotation in the other plane. The allowed direction of rotation was chosen in each test to induce buckling around the strong or the weak axis. The load was applied at ambient temperature and maintained for a period of 15 minutes after which the temperature was increased under constant load. The load was applied concentrically on some tests and with an eccentricity in other tests. The load eccentricity was either applied at both ends, leading to constant bending moment distribution along the length, or at one end only, leading to a triangular bending moment distribution. Heating was applied by electrical resistances enclosed in ceramic pads. The columns and the ceramic pads were wrapped in ceramic wool insulating material. This technique was preferred to gas heating in a standard test furnace because it allows applying a slower and better controlled heating rate and thus obtaining a more uniform temperature distribution in the member. It is also easier to measured lateral displacements of the column. Preliminary blank tests were performed on unloaded specimen in order to determine the heating range to be used later on the loaded columns. The paper will also report on a modification of the heating technique that was applied and improved significantly the uniformity in the temperature distribution. Numerical simulations were performed before the tests using shell elements of the software SAFIR and assumed values of the material properties in order to predict the failure modes. It was essentially crucial to determine whether lateral supports at intermediate levels should be provided in order to ensure failure in the desired direction. Experience showed that the failure modes developed as predicted by the numerical simulations. Besides a thorough description of the experiments, the paper will also present the obtained results in terms of failure mode, ultimate temperature and evolution of longitudinal and transverse displacement. Some information will also be given about the level of detail that has to be used in the numerical model in order to get accurate results at a reasonable price. [less ▲]

Detailed reference viewed: 77 (10 ULg)
See detailInternet : support, médium ou épimédium ?
Barnabé, Fanny ULg; Dozo, Björn-Olav ULg

Conference (2014, June 11)

Detailed reference viewed: 11 (2 ULg)
Full Text
Peer Reviewed
See detailLes remèdes d'origine égyptienne utilisés dans la médecine vétérinaire antique
Marganne, Marie-Hélène ULg

Conference (2014, June 10)

Recherche systématique des ingrédients d'origine égyptienne attestés dans les recettes des écrits vétérinaires grecs et latins, et comparaison de leur utilisation à celle de la médecine humaine, avec ... [more ▼]

Recherche systématique des ingrédients d'origine égyptienne attestés dans les recettes des écrits vétérinaires grecs et latins, et comparaison de leur utilisation à celle de la médecine humaine, avec évaluation de leur accessibilité et leur coût. [less ▲]

Detailed reference viewed: 6 (0 ULg)
See detailFe and Mg Isotope Fractionation in Olivine from the NWA 1068 Shergottite
Collinet, Max ULg; Charlier, Bernard ULg; Namur, Olivier et al

Conference (2014, June 09)

Detailed reference viewed: 15 (2 ULg)
Full Text
See detailHigher Symmetries of the conformal Laplacian
Radoux, Fabian ULg

Conference (2014, June 09)

Detailed reference viewed: 3 (0 ULg)
See detailGround-based transmission spectrum of WASP-80 b, a gas giant transiting an M-dwarf
Delrez, Laetitia ULg; Gillon, Michaël ULg; Lendl, Monika ULg et al

Poster (2014, June 09)

We present here some results from our ground-­based multi-­object spectroscopy program aiming to measure the transmission spectrum of the transiting hot Jupiter WASP-80b using the VLT/FORS2 instrument ... [more ▼]

We present here some results from our ground-­based multi-­object spectroscopy program aiming to measure the transmission spectrum of the transiting hot Jupiter WASP-80b using the VLT/FORS2 instrument. WASP-­80b is a unique object as it is the only known specimen of gas giant orbiting an M-dwarf that is bright enough for high SNR follow-­up measurements. Due to the nature of its host star, this hot Jupiter is actually more `warm' than `hot', with an estimated equilibrium temperature of only 800K. It is thus a prime target to improve our understanding of giant exoplanet atmospheres in this temperature range. [less ▲]

Detailed reference viewed: 1 (0 ULg)
Full Text
Peer Reviewed
See detailEffects of tillage practices and crop residue exportation on earthworm communities and soil physico-­chemical properties in silt loam arable soil (Belgium)
Lemtiri, Aboulkacem ULg; Colinet, Gilles ULg; Alabi, Taofic ULg et al

Poster (2014, June 08)

Earthworms are known to play integral roles in soils, and are often referred to as vital soil and ecosystem engineers due to their capacity to influence a wide range of chemical, physical, and biological ... [more ▼]

Earthworms are known to play integral roles in soils, and are often referred to as vital soil and ecosystem engineers due to their capacity to influence a wide range of chemical, physical, and biological properties of soil environments. Therefore, it is important to understand how earthworm communities are impacted by tillage systems and crop management practices. In the present study, earthworm and soil samples were collected from wheat cultivated fields in Gembloux, Belgium under the following four experimental treatments: (1) conventional tillage with crop residues left in the soil (CT/IN); (2) conventional tillage with crop residues removed from the field (CT/OUT); (3) reduced tillage with crop residues left in the soil (RT/IN); and (4) reduced tillage with crop residues removed from the field (RT/OUT). The different tillage systems were applied for four consecutive years prior to the initiation of the current study. Results indicated soil compaction was significantly higher in RT compared with CT up to a depth of 6–49 cm. Significant differences were not detected between residue incorporation depth systems, where results showed mean earthworm abundance was respectively 182.25 and 180 individuals.m-2 in CT and RT. Mean earthworm biomass was similarly not significantly different between CT and RT, where results were respectively 48.52 and 57.27 g.m-2. However, a significant difference was observed between IN and OUT treatments, suggesting the exportation of wheat residues will limit earthworm abundance and biomass in CT and RT plots. Data showed high representation of the endogeic earthworm ecological category, notably N. c. caliginosus regardless of treatment. Despite tillage system and exportation of crop residues, N. c. caliginosus, L. terrestris, and A. r. rosea exhibited high abundance, indicating tolerance to soil environmental conditions. For each depth, measures of soil physico-chemical properties showed significant differences among treatments. Furthermore, soil chemical property attributes were significantly higher in the first soil centimetres compared to lower soil layers. These results were attributable to earthworm activity and wheat residues, suggesting earthworms contributed to nutrient dynamics, particularly at increased soil depths. Overall, the results emphasise the influence of exportation of crop residues on earthworm community and also, the important influence of earthworm activity on soil physico-chemical properties change, processes which are closely linked. [less ▲]

Detailed reference viewed: 15 (1 ULg)
Full Text
See detailFast Ambient Pressure Thermal cycling of space solar arrays samples under equivalent AM0 illumination conditions
Guiot, Marc ULg; Fernandez Lisbona, Emilio; Witteveen, Bob et al

Conference (2014, June 08)

Detailed reference viewed: 13 (1 ULg)
Peer Reviewed
See detailLe sort des travailleurs d’une entreprise en réorganisation judiciaire
Kéfer, Fabienne ULg; Gailliet, Guillaume ULg

in Clesse, Jacques (Ed.) Questions choisies de droit social. Hommage à Michel Dumont (2014, June 06)

Le droit de l’entreprise en difficulté entretient avec le droit du travail des liens tendus. La préservation du potentiel économique de l’entreprise s’affronte aux dispositions visant à éviter la ... [more ▼]

Le droit de l’entreprise en difficulté entretient avec le droit du travail des liens tendus. La préservation du potentiel économique de l’entreprise s’affronte aux dispositions visant à éviter la dégradation de la situation des travailleurs. Le complexe normatif étudié reflète le point actuel du rapport de force entre le monde économique et les syndicats. Les salariés sont, en définitive, amenés à faire une grande partie du sacrifice nécessaire pour atteindre l’objectif économique recherché. Ce constat est perceptible dans l’hypothèse d’une réorganisation par accord collectif et dans celle du transfert sous autorité de justice, qui témoignent des rapports complexes entre les intérêts économiques et sociaux. La conciliation de ces intérêts divergents s’effectue sous la surveillance du juge. [less ▲]

Detailed reference viewed: 16 (2 ULg)
Full Text
Peer Reviewed
See detailOn-the-fly domain adaptation of binary classifiers
Pierard, Sébastien ULg; Marcos Alvarez, Alejandro ULg; Lejeune, Antoine ULg et al

in 23rd Belgian-Dutch Conference on Machine Learning (BENELEARN) (2014, June 06)

This work considers the on-the-fly domain adaptation of supervised binary classifiers, learned off-line, in order to adapt them to a target context. The probability density functions associated to ... [more ▼]

This work considers the on-the-fly domain adaptation of supervised binary classifiers, learned off-line, in order to adapt them to a target context. The probability density functions associated to negative and positive classes are supposed to be mixtures of the source distributions. Moreover, the mixture weights and the priors are only available at runtime. We present a theoretical solution to this problem, and demonstrate the effectiveness of the proposed approach on a real computer vision application. Our theoretical solution is applicable to any classifier approximating Bayes' classifier. [less ▲]

Detailed reference viewed: 38 (4 ULg)
Full Text
Peer Reviewed
See detail[18F]UCB-H AS A NEW PET RADIOTRACER FOR SYNAPTIC VESICLE PROTEIN 2A
Bahri, Mohamed Ali ULg; Bastin, Christine ULg; Aerts, Joël ULg et al

Poster (2014, June 06)

Synaptic vesicle protein 2A (SV2A) is widely distributed in the brain and has been demonstrated to be involved in vesicle trafficking. The critical role of SV2A in proper nervous system function is shown ... [more ▼]

Synaptic vesicle protein 2A (SV2A) is widely distributed in the brain and has been demonstrated to be involved in vesicle trafficking. The critical role of SV2A in proper nervous system function is shown, for example, by the fact that it is a binding site and the primary mechanism of levetiracetam. Levetiracetam is an antiepileptic drug which has recently been suggested to reduce synaptic deficits in a mouse model for Alzheimer’s disease and to improve cognition in patients with amnestic mild cognitive impairment. We here aimed to investigate the cerebral distribution of [18F]UCB-H, a fluorine-18 radiolabelled PET imaging tracer, which has a high affinity with the SV2A. [18F]UCB-H was radiosynthesized under GMP conditions. Dynamic PET data of the head of four healthy volunteers were acquired over 100 minutes after injection of 170.4 ± 24.9 MBq of [18F]UCB-H. The arterial input function was obtained by blood sampling during the dynamic PET acquisition. The analysis of the blood data reveled a consistent amount of [18F]UCB-H in whole blood and plasma which indicates a very low degree of binding of the tracer to the red blood cells. The unchanged fraction of [18F]UCB-H in plasma showed a bi-exponential behavioral decrease with a starting fraction of 92% of the injected amount of the tracer, measured at 3 min post injection. This fraction decreased to about 50% at 10 min post injection. The [18F]UCB-H PET data showed a high and rapid uptake in the grey matter structures, matching the known ubiquitous distribution of the SV2A in the brain. The kinetics of the tracer in the brain was characterized by an initial high uptake phase followed by rapid washout allowing the standard compartmental modeling (1-tissue compartment, 2-tissue compartment, and Logan graphical analysis). The three models gave consistent results. The two-tissue compartment model fitted the experimental data best and provided a total distribution volume of the [18F]UCB-H in the brain greater than 7 mL/cm3 and a specific distribution volume around 3 mL/cm3. Our results suggest that [18F]UCB-H is a good candidate as radiotracer for brain SV2A proteins and could be used for human studies. In the future, SV2A modifications might be assessed in neurological pathologies such as Alzheimer’s disease. [less ▲]

Detailed reference viewed: 13 (4 ULg)
Full Text
Peer Reviewed
See detailComparison between wind speed observed at 100m height and wind speeds simulated by the WRF and MAR models
Doutreloup, Sébastien ULg; Fettweis, Xavier ULg; Erpicum, Michel ULg et al

Poster (2014, June 06)

In the context of FLEXIPAC project funded by "RELIABLE" program of Walloon Region (Belgium), the Laboratory of Climatology and Topoclimatology (LCT) of the University of Liège (Belgium) aims to adjust the ... [more ▼]

In the context of FLEXIPAC project funded by "RELIABLE" program of Walloon Region (Belgium), the Laboratory of Climatology and Topoclimatology (LCT) of the University of Liège (Belgium) aims to adjust the WRF regional model (v.3.4.) forced by ERA-Interim model. Our analysis shows that wind speeds at 100m height simulated by WRF are systematically overestimated compared to wind speeds extracted from wind productions of two wind farms. In order to identify this problem, four comparisons were performed in this contribution. Firstly, we compare WRF model with reanalysis based forcing model. Secondly, we compare two WRF simulations, where one of them has a more precise spatial resolution. Thirdly, we smooth WRF outputs in time (6-hr running mean) in order to study the accuracy of the 30-min variability generated by WRF model. Finally, we comp compare the WRF model with the MAR (v3.3.) regional model using the same forcing at its lateral boundaries. This last one seems to suggest that the MAR model better simulates wind speeds at 10m and at 100m than WRF model and then that wind speed underestimation by WRF is well linked to the WRF physics itself. [less ▲]

Detailed reference viewed: 40 (3 ULg)
Full Text
See detailMuti-scale methods with strain-softening: damage-enhanced MFH for composite materials and computational homogenization for cellular materials with micro-buckling
Wu, Ling ULg; Nguyen, Van Dung ULg; Adam, Laurent et al

Conference (2014, June 06)

In this work, multi-scale methods with strain softening are developed in the contexts of damage modeling for composite laminates and of buckling analyses in cellular materials. First, an anisotropic ... [more ▼]

In this work, multi-scale methods with strain softening are developed in the contexts of damage modeling for composite laminates and of buckling analyses in cellular materials. First, an anisotropic gradient–enhanced continuum damage model is embedded in a mean–field homogenization (MFH) process for elasto-plastic composites. The homogenization procedure is based on the newly developed incremental secant mean-field homogenization formulation, for which the residual stress and strain states reached in the phases upon a fictitious elastic unloading are considered as starting point to apply the secant method. The mean stress fields in the phases are then computed using isotropic secant tensors, which are naturally used to define the Linear Comparison–Composite The resulting multi– scale model is then applied to study the damage process at the meso–scale of laminates, and in particular the damaging of plies in a composite stack. By using the gradient–enhanced continuum damage model, the problem of losing uniqueness upon strain softening is avoided. Second, an efficient multi–scale finite element framework capturing the buckling instabilities in cellular materials is developed. As a classical multi–scale computational homogenization scheme loses accuracy with the apparition of the macroscopic localizations resulting from the micro–buckling, the second order multi–scale computational homogenization scheme is considered. This second–order computational framework is enhanced with the following novelties so that it can be used for cellular materials. At the microscopic scale, the periodic boundary condition is used because of its efficiency. As the meshes generated from cellular materials exhibit a large void part on the boundaries and are not conforming in general, the classical enforcement based on the matching nodes cannot be applied. A new method based on the polynomial interpolation2 without the requirement of the matching mesh condition on opposite boundaries of the representative volume element (RVE) is developed. Next, in order to solve the underlying macroscopic Mindlin strain gradient continuum of this second–order scheme by the displacement–based finite element framework, the treatment of high order terms is based on the discontinuous Galerkin (DG) method to weakly impose the C1-continuity. Finally, as the instability phenomena are considered at both scales of the cellular materials, the path following technique is adopted to solve both the macroscopic and microscopic problems. [less ▲]

Detailed reference viewed: 23 (12 ULg)
Full Text
See detailDesign and synthesis of high-affinity ligands of AMPA receptors and study of their Fluorine-18 radiolabeling
Deverdenne, François ULg; Goffin, Eric ULg; Plenevaux, Alain ULg et al

Poster (2014, June 05)

The AMPA subtype of glutamatergic receptors is the main actor in the excitatory neurotransmission in the mammalian central nervous system. These receptors are involved in the expression and the ... [more ▼]

The AMPA subtype of glutamatergic receptors is the main actor in the excitatory neurotransmission in the mammalian central nervous system. These receptors are involved in the expression and the maintenance of the long-term potentiation, a phenomenon closely linked to cognitive and memorization processes. Based on experimental data collected in recent years, the use of AMPA potentiators seems to be an interesting approach in the treatment of cognitive deficits (e.g. Alzheimer disease), schizophrenia or depression. Such AMPA signal potentiation could be mediated by positive allosteric modulators (PAMs) of the AMPA receptors, a class of compounds able to produce a fine signal tuning in the presence of the endogenous ligand in the synapse, providing less toxicity than direct agonists. With this approach, the laboratory of Medicinal Chemistry of Liège university developed many series of AMPA potentiators , among which 1,2,4-benzothiadiazine 1,1-dioxides (BTDs). In order to better understand the in vivo mapping of AMPA receptors and its evolution in neurological diseases, the present work aims at developing the design and the synthesis of BTDs positive allosteric modulators radiolabeled with a fluorine-18 atom. Based on previously synthesized series in this field, we investigate the synthesis of a new class of high-affinity AMPA potentiators characterized by the presence of a fluorine atom at selected positions on the structure of the AMPA potentiators. Thanks to in vitro pharmacological evaluations, we will further determine the best candidates for their fluorine-18 radiolabeling. [less ▲]

Detailed reference viewed: 11 (1 ULg)
Full Text
See detailLa charge de confesseur princier au XVIIème siècle, une définition controversée
Pirlet, Pierre-François ULg

Conference (2014, June 05)

Si la mission d'un confesseur au début du XVIIème siècle est strictement définie par les textes canoniques du catholicisme comme celle d'un administrateur de sacrement, la définition des tâches revenant ... [more ▼]

Si la mission d'un confesseur au début du XVIIème siècle est strictement définie par les textes canoniques du catholicisme comme celle d'un administrateur de sacrement, la définition des tâches revenant au confesseur du Prince est étonnamment lâche. Du premier, on attendait qu'il jugeât les actes de son pénitent, propose une consolation – sous la forme d'exercices expiatoires – destinés à le réconcilier avec Dieu, et offre une direction spirituelle visant à prévenir les rechutes dans le péché. Mais confesser le Prince contraignait le religieux qui s’y attelait à un exercice bien plus complexe. Il lui revenait de juger et d'apporter une direction de conscience aux deux personnes du roi : l'humaine et l'institutionnelle. En effet, il eût été impossible de distinguer formellement l'âme du souverain de celle du mortel. De même, il échoyait au confesseur de conseiller son pénitent quant à l'aspect moral de ses décisions, que celles-ci n'impliquèrent que sa personne, ou au contraire l'ensemble des territoires et des sujets sous sa conduite. De cette difficulté naquit une controverse quant à l'implication nécessaire et raisonnable du confesseur princier dans les affaires temporelles : la papauté, les rois d'Espagne, les ecclésiastiques de cour madrilènes, les gouverneurs-généraux des Pays-Bas et les supérieurs des ordres religieux dont étaient issus les confesseurs – et particulièrement la Compagnie de Jésus – proposèrent tous une définition différente – et controversée – des prérogatives de ce religieux au cœur du pouvoir. En prenant appui sur la situation des confesseurs de la cour de Bruxelles durant la grande première moitié du XVIIème siècle, nous tâcherons au travers de cette communication de proposer un aperçu global des différentes définitions de la confession princière telles que défendues par les contemporains. Notre exposé proposera en outre un rapide regard sur les deux approches utilisées par les historiens pour reconstituer les différentes définitions de la charge : à la patiente collecte et à l'analyse des traces laissées dans les sources par l'activité au quotidien des confesseurs (approche bottom-up) se confronte une méthode cherchant une définition d'époque des prérogatives de ces religieux faisant autorité (approche top-down). Nous constaterons que ces deux approches, qui ne s'opposent pas, s’accommodent néanmoins difficilement l'une à l'autre, créant ainsi une controverse non plus dans l'objet, mais dans la méthode. [less ▲]

Detailed reference viewed: 13 (1 ULg)
Full Text
Peer Reviewed
See detailExploration du récit de vie d’adolescents
Poudat, Céline; Boulard, Aurore ULg

in Née, Emilie; Daube, Jean-Michel; Valette, Mathieu (Eds.) et al Proceedings-actes des 12èmes journées d'analyse statistique de données textuelles (2014, June 05)

The present paper follows on from the research we presented in previous JADT (Boulard, Poudat, Gauthier 2012). We still focus on the development of narrative competence (Habermas et Bluck 2000) in ... [more ▼]

The present paper follows on from the research we presented in previous JADT (Boulard, Poudat, Gauthier 2012). We still focus on the development of narrative competence (Habermas et Bluck 2000) in children and adolescents. Although children develop narrative skills, life narratives only emerge in adolescence. On the basis of a corpus made of spontaneous oral speech, we had empirically demonstrated that pre-adolescents aged of 12 had developed stabilized narrative skills enabling them to produce life narratives. Here, we propose a first exploration of the overall structure of adolescent life stories, thanks to a corpus of 268 oral self narratives completed with a questionnaire. [less ▲]

Detailed reference viewed: 9 (4 ULg)
Peer Reviewed
See detailLes médiateurs scolaires en action : des discours aux pratiques
Dethier, Baptiste ULg

Conference (2014, June 05)

En 1993, dans un contexte marqué les questions d’insécurité, de violence scolaire, de crise de confiance envers les institutions ou encore de décrochage scolaire, 28 médiateurs sont engagés dans autant ... [more ▼]

En 1993, dans un contexte marqué les questions d’insécurité, de violence scolaire, de crise de confiance envers les institutions ou encore de décrochage scolaire, 28 médiateurs sont engagés dans autant d’établissements scolaires aux publics défavorisés de la région bruxelloise. Ce projet pilote, voyant le jour sous la houlette du Ministère de l’enseignement, ne sera institutionnalisé qu’en 1998 dans un décret créant le Service de Médiation Scolaire, divisé en deux entités : 56 médiateurs internes à Bruxelles et 30 médiateurs externes (répartis par zones couvrant plusieurs établissements) en Wallonie. Par ailleurs, d’autres niveaux de pouvoir (communes, diocèses, écoles) créaient également, localement, leurs propres fonctions de médiateur scolaire. Actuellement, on en dénombre environ 120 en Belgique francophone. Ce nouvel acteur, bien que peu étudié, incarnerait un nouveau mode de régulation sociale (Bonafé-Schmitt, 1996) remettant en question les équilibres historiques du système scolaire (Verhoeven, 1997). En effet, il se présente comme un tiers neutre et indépendant de l’établissement, permettant ainsi la création d’un espace où peuvent se résoudre différents problèmes concernant les personnes demandeuses, qu’elles soient élèves, membres du personnel scolaire ou encore parents. Dans un premier temps, notre attention se porte sur l’ensemble des acteurs portant le nom de médiateurs scolaires (Kuty et al., 2012). Au sein d’un cadre légal ne définissant que vaguement leur fonction, ces derniers sont néanmoins globalement chargés de prévenir la violence et le décrochage scolaires et de favoriser, conserver ou rétablir le climat de confiance entre élèves, écoles et familles. À partir de là, ils ont progressivement construit leurs propres pratiques et leur identité, cherchant par là à trouver et à consolider leur place au sein d’un milieu scolaire déjà marqué par la présence de multiples acteurs. Dans un second temps, des études de cas approfondies dans six établissements d’enseignement secondaire permettent de constater que les médiateurs ne disposaient pas du monopole de la médiation (Dubois et Dethier, 2013), concept polysémique auquel de nombreux acteurs se réfèrent pour qualifier certains aspects de leur travail quotidien. En outre, le recours à la médiation ou aux médiateurs ne se révèle être qu’une solution parmi d’autres pour faire face aux différents problèmes rencontrés par les acteurs : violence, décrochage, absentéisme, échec scolaire, conflits, problèmes socio-économiques… Ces constats exigent une étude empirique approfondie du travail concret réalisé par les médiateurs scolaires, une étude attentive à leurs discours mais aussi à l’observation de leurs pratiques et interactions directes avec les différents acteurs scolaires. Les résultats de cette étude font l’objet de cette communication. Cette contribution se base sur un corpus composé de onze entretiens individuels, trois focus groups et trois périodes d’observation non participante auprès de médiateurs belges francophones membres d’un même service. Ces derniers revendiquent une posture de tiers neutre et indépendant dans l’école, ainsi que des principes basés sur le non-jugement, la confidentialité, l’accueil inconditionnel de la demande ou encore la non-expertise. Il s’agira par conséquent de rendre compte de la manière dont ces médiateurs traduisent leurs discours en pratiques au quotidien. [less ▲]

Detailed reference viewed: 14 (2 ULg)
Full Text
Peer Reviewed
See detailLa psychopathologie à la lumière des histoires de vie : Etude de la fonction narrative d’adolescents obèses et dépressifs.
Jadin, Aurore ULg; Gauthier, Jean-Marie ULg; Boulard, Aurore ULg

in Née, Emilie; Daube, Jean-Michel; Valette, Mathieu (Eds.) et al Proceedings-Actes des 12èmes journées internationales d'analyse statistique de données textuelles (2014, June 05)

Obesity in adolescence is a complex chronic illness with havy consequences in short, medium and long terms, both in terms of physical health and mental health, disturbing the body and identity of these ... [more ▼]

Obesity in adolescence is a complex chronic illness with havy consequences in short, medium and long terms, both in terms of physical health and mental health, disturbing the body and identity of these youngs (High Authority of Health, 2011; Nietsen and Bruwier, 2007). The literature mentions depression as a pathology associated with obesity. Some researchers consider obesity as a cause of depressive symptoms while others researchers see depression like a risk factor for excessive weight gain (Blaine, 2008). Depression in adolescence has been the subject of epidemiological studies for some years. In adolescents, the prevalence rates vary from 5 to 7 % for major depressive episode (MDE) with a prevalence of 2 girls for one boy (Alvin and Marcelli, 2005). The specific symptoms of depressed mood are present in 30-40 % of schooled adolescents (Boulard et al., 2012). During adolescence, the individual acquires the ability to link the various elements of one’s life and build a coherent life story. The adolescent will write one’s story in a personal context. According to Habermas et al. (2008), both the form and the content of life stories show how the individual integrates the lived experiences in a coherent whole. Based on the statistical analysis of textual data, we compared the life stories of 28 obese adolescents, depressed schooled adolescents, depressed hospitalized adolescents and control ones. The first results show specific structures and particular contents depending on these groups. The use of pronouns, temporal markers and the reported events differ by groups. Beyond clinical results, this research also highlights the interest of statistical analysis of textual data (ADT) to improve the understanding of adolescent’s psychopathology. [less ▲]

Detailed reference viewed: 32 (10 ULg)
Full Text
Peer Reviewed
See detailFunctional study of the Ser/Arg-rich splicing factor SRSF5a during zebrafish embryonic development
Joris, Marine ULg; Muller, Marc ULg; Motte, Patrick ULg

Poster (2014, June 05)

Nuclear pre-mRNA splicing is a key process regulating gene expression in eukaryotes. Splicing consists in the removal of introns and the joining of exons within a dynamic macromolecular complex called the ... [more ▼]

Nuclear pre-mRNA splicing is a key process regulating gene expression in eukaryotes. Splicing consists in the removal of introns and the joining of exons within a dynamic macromolecular complex called the spliceosome, which consist of five small nuclear ribonucleoproteins (snRNPs) and numerous non snRNPs proteins (1). Amongst these non snRNPs proteins, the SR proteins family constituted an important group of splicing factors that are involved in constitutive and alternative splicing (2,3). SR proteins are structurally related as they are characterized by one or two RNA-recognition motifs (RRMs) in N-ter and a C-terminal domain enriched in dipeptide Ser/Arg. Phylogenetic inference using the RRM domain allowed us to identify 13 encoding genes for SR proteins in the vertebrate model organism, Danio rerio. The Zebrafish is increasingly recognized as a powerful model for the study of vertebrate embryonic development in a physiological context. The roles of SR splicing factors during animal cell differentiation and development are largely unknown. The aim of the present research is to investigate SR proteins functions during zebrafish development by using molecular and genetic approaches. In this study, we investigated the role of the SR splicing factor SRSF5a. The expression profile was determined by in situ hybridization at 24, 48 and 72 hours post-fertilization and showed SRSF5a expression mainly in brain, retina and pharyngeal arches at these stages. Furthermore, SRSF5a knock-down by morpholinos microinjection strongly suggests an important role of this specific splicing factor during eyes and brain development. In order to gain insight into the molecular function of SRSF5a, we analysed control and morphant transcriptomes using high throughput RNA sequencing. Finally, we use a complementary approach to morpholinos and generate SRSF5a mutant fishes using TALENs (Tal effector nucleases)(4,5). 1. Wahl MC, Will CL, & Luhrmann R (2009) The spliceosome: design principles of a dynamic RNP machine. Cell 136(4):701-718. 2. Long JC & Caceres JF (2009) The SR protein family of splicing factors: master regulators of gene expression. Biochem J 417(1):15-27. 3. Graveley BR (2000) Sorting out the complexity of SR protein functions. RNA 6(9):1197-1211. 4. Moore et al. (2012) Improved Somatic Mutagenesis in Zebrafish Using Transcription Activator-Like Effector Nucleases (TALENs). Plos One 120(1):1-12. 5. Cade et al (2012) Highly efficient generation of heritable zebrafish gene mutations using homo- and heterodimeric TALENs. Nucleic acid research Vol 40, No 16:8001-8010. [less ▲]

Detailed reference viewed: 7 (0 ULg)
Full Text
Peer Reviewed
See detailA PREFERENTIAL FOLDED CONFORMATION OF SOME BIS-(8-ISOPROPYL-ISOQUINOLINIUM) DERIVATIVES EXPLAINS STEREOSELECTIVE REDUCTION BY SODIUM BOROHYDRIDE
Dilly, Sébastien ULg; Badarau, Eduard; Dufour, Fabien et al

Poster (2014, June 05)

Small conductance Ca2+-activated K+ (SK) channels play a role in modulating the firing rate and the firing pattern of neurons [Waroux, Eur J Neurosci, 2005, 22, 3111]. A blockade of these targets could be ... [more ▼]

Small conductance Ca2+-activated K+ (SK) channels play a role in modulating the firing rate and the firing pattern of neurons [Waroux, Eur J Neurosci, 2005, 22, 3111]. A blockade of these targets could be useful for the treatment of cognitive dysfunction, neuronal hyperexcitability or dopamine related disorders [Liégeois, Curr Med Chem, 2003, 10, 625]. At the peripheral level, the inhibition of these channels was demonstrated to prevent and terminate atrial fibrillation [Diness, Circ Arrhythm Electrophysiol, 2010, 3, 380]. Moreover, SK channels might represent potential targets for a new class of anticancer agents due to their involvement in breast cancer cell migration [Potier, Mol Cancer Ther, 2006, 5, 2946]. So far, available blockers are not suitable CNS pharmacological tools being either peptides or small molecules with permanent positive charges [Liégeois, Curr Med Chem, 2003, 10, 625; Graulich, J Med Chem, 2007, 50, 5070; Badarau, Bioorg Med Chem Lett, 2011, 21, 6756]. Therefore, symmetrical bis-isoquinolinium compounds have subsequently been transformed to 1,2,3,4-tetrahydroisoquinoline analogues by using sodium borohydride leading to a diastereoisomeric mixture (figure 1) in order to obtain potential CNS-penetrating agents [Graulich, Bioorg Med Chem Lett, 2008, 18, 3440; Neny, Proceedings of the 12th International Conference on In Vivo Methods, Vancouver, Canada, 2008, 267; Koulchitsky, Acta Physiologica, 2009, 195, 670]. Resolution of these mixtures and characterization of the corresponding stereoisomers [Wouters, Eur J Med Chem, 2010, 45, 3240] are necessary before further biological evaluation. In a series of 8- isopropyl analogues, chiral resolution failed for the analogues with propyl and m-xylyl linkers since two and one peaks, respectively, were detected [Nistor, J Pharm Biomed Anal, 2013, 74, 273]. Could these results be explained by an ineffective resolution or would another phenomenon be involved? Further analysis using chiral chromatography, mass spectroscopy and circular dichroism of a sample of the propyl analogue revealed that it is a racemic mixture. X-ray cristallography and conformational analysis indicated a folded conformation of the propyl and m-xylyl analogues (figure 2) responsible for a stereoselective attack of the borohydride reagent during the reduction step. Additional 1H-NMR investigations support structural features detected by theoretical analysis. [less ▲]

Detailed reference viewed: 11 (0 ULg)
Peer Reviewed
See detailApproche lexicométrique des controverses climatiques
Scotto d'Apollonia, Lionel; Luxardo, Giancarlo; Piet, Grégory ULg

Poster (2014, June 05)

D’un point de vue historique, les controverses climatiques prennent racine à la fin du XIXe siècle et se sont déployées tout au long du XXe siècle. Elles prennent toutefois une tournure plus politique, en ... [more ▼]

D’un point de vue historique, les controverses climatiques prennent racine à la fin du XIXe siècle et se sont déployées tout au long du XXe siècle. Elles prennent toutefois une tournure plus politique, en ce début de XXIe siècle, en ce sens que le débat climatique « se priorise » dans les agendas politiques des Etats européens, de manière générale. Si les études sur les controverses climatiques tendent, certes, à se développer de plus en plus actuellement, l’approche linguistique demeure peu investie par rapport au potentiel analytique qu’elle pourrait apporter à la recherche sur le sujet. L’une des rares études lexicométriques concernant le climat est celle réalisée par Lamria Chetouani dont le corpus de textes s’étend de 1989 à 1990. Il faut aussi prendre en compte les travaux de Francis Chateauraynaud, qui a entrepris une démarche destinée au traitement des controverses s'appuyant sur un ensemble de techniques : la socio-informatique. Inscrit dans un cadre d’analyse socioépistémique des controverses socioscientifiques et en se basant sur un corpus de textes choisis autour de la période 2009 - 2010, notre article propose donc d'associer une analyse socio-informatique des controverses climatiques avec une utilisation d'outils lexicométriques. En nous concentrant sur le traitement discursif de quelques notions-clés, notamment l'incertitude et le risque, nous cherchons à croiser les résultats fournis par la lexicométrie (logiciel Lexico) avec ceux fournis par la socio-informatique (logiciel Prospero). En conclusion, nous ouvrons un espace de discussion sur les modes opératoires permettant d'articuler les deux approches. [less ▲]

Detailed reference viewed: 28 (0 ULg)
Full Text
Peer Reviewed
See detailBiorefine: Recovery of nutrients and metallic trace elements from different wastes by chemical and biochemical processes
Tarayre, Cédric ULg; Fischer, Christophe ULg; De Clercq, Lies et al

Conference (2014, June 05)

At present, most waste processing operations are not oriented towards the valorization of valuable reusable components such as nitrogen, phosphorus, potassium and even Metallic Trace Elements (MTEs ... [more ▼]

At present, most waste processing operations are not oriented towards the valorization of valuable reusable components such as nitrogen, phosphorus, potassium and even Metallic Trace Elements (MTEs). Currently, sewage sludge, for example is usually used as a fertilizer in agriculture, in energy production or in the field of construction. Ashes originating from sludge incineration contain heavy metals and minerals in large quantities. Manure is mainly used in agriculture, although considerable amounts of nutrients are lost and cause pollution. Digestate is also used in agriculture, but other alternatives have been proposed, such as the energetic valorization. Better valorization of these wastes in agriculture (or other sectors) is however largely constrained by a multitude of legal requirements. An important problematic point is the concentration in MTEs that is found in those wastes. Consequently, recovery of nutrients and MTEsmay be a key solution for optimal valorization of wastes. Many unit operations used in the field of chemical and biochemical engineering (mechanical operations on fluids, solids, mass and heat transfers, chemical reactions, etc.) could be used in order to achieve an efficient recovery yield of nutrients and trace elements. The aim of the BioRefine Project is to make an inventory of all recovery techniques of nutrients and MTEs in five countries: Belgium, France, Germany, United Kingdom and The Netherlands. Pilot plants will also be tested to assess the efficiency of new treatment techniques after which the most efficient processes will be chosen to be applied on a larger scale. In addition, the collected data will be used to propose exploitation scenarios taking into account legal constraints and optimized logistics.This work is supported through an INTERREG IVB NWE programme(ref. 320J-BIOREFINE). [less ▲]

Detailed reference viewed: 14 (0 ULg)
Full Text
Peer Reviewed
See detailMALDI Mass Spectrometry Imaging: a new tool to decipher the antibiome of Bacillus amyloliquefaciens
Debois, Delphine ULg; Jourdan, Emmanuel; Cawoy, Hélène et al

Conference (2014, June 05)

Soil Bacillus isolates may devote up to 8% of their genome to nonribosomal synthesis of lipopeptide (LP)- and polyketide (PK)-type antibiotics. LPs from surfactin, iturin and fengycin families are known ... [more ▼]

Soil Bacillus isolates may devote up to 8% of their genome to nonribosomal synthesis of lipopeptide (LP)- and polyketide (PK)-type antibiotics. LPs from surfactin, iturin and fengycin families are known to exert different actions on the wellness of the producing strain such as fungitoxicity (iturin, fengycin) or motility, root colonization and immune stimulating agent (surfactin). Nevertheless, few is reported about the actual antibiome secreted in situ by Bacillus cells during confrontation with phytopathogens or plant root colonization. We developed a method mimicking the conditions prevailing in the rhizosphere and, taking advantage of the versatility of Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry Imaging, we were able to localize and identify antibiotics produced in situ by bacterial cells. First, we applied this new methodology to bioassays in which Bacillus amyloliquefaciens 98S were grown together with Fusarium oxysporum, with the aim of deciphering the role of the different LP families during the phytopathogen growth inhibition. Our results showed that the three LP families were readily produced in different proportions. Especially, images of surfactins, iturins and fengycins demonstrated that iturins are the antibiotic family actually involved in the antagonism against Fusarium oxysporum. In a second approach, we used a “in planta” model in which Bacillus amyloliquefaciens S499 was simultaneously grown with Tomato and Arabidopsis thaliana roots. Imaging results, obtained during a time course analysis, showed that surfactin is always the major lipopeptide detected. In further experiments involving a refined time-window, we observed that surfactin is actually produced as soon as 24h post inoculation. These results were the starting point of a wider study showing that the early accumulation of surfactin is a complex phenomenon involving, among other mechanisms, cell-well components recognition by bacteria, and that this interaction is a win-win association for both plant and bacterial cells. [less ▲]

Detailed reference viewed: 34 (1 ULg)
Full Text
Peer Reviewed
See detailLo stato di necessità, invenzione moderna o romana?
Gerkens, Jean-François ULg

Conference (2014, June 04)

Detailed reference viewed: 15 (0 ULg)
Full Text
See detailApproche socio-écologique: arrangements de la complexité
Absil, Gaëtan ULg

Conference (2014, June 04)

Detailed reference viewed: 23 (12 ULg)
Full Text
See detailL'épaule un carrefour complexe
WANG, François-Charles ULg; LOZZA, Alessandro

Conference (2014, June 04)

Detailed reference viewed: 1 (0 ULg)
Full Text
Peer Reviewed
See detailElectrical characterization of pGeSn/nGe diodes
Baert, Bruno ULg; Gupta, Somya; Gencarelli, Federica et al

Conference (2014, June 03)

I-V characteristics of pGeSn/nGe diodes have been measured and show very good properties. Simulations of the same structure are able to reproduce most of the observed behavior and point to the ... [more ▼]

I-V characteristics of pGeSn/nGe diodes have been measured and show very good properties. Simulations of the same structure are able to reproduce most of the observed behavior and point to the predominating influence of parameters such as the band gap energy of the GeSn layer. C-V characteristics showing little frequency dependence have also been measured, and their analysis for the determination of the carrier concentration is confirmed by simulations. More investigations, including the effect of temperature and other defects at the interface or in the bulk of either layers are still required in order to explain some of the observed behaviors, notably the reverse saturation current. [less ▲]

Detailed reference viewed: 17 (0 ULg)
Full Text
See detailUn chiffre en débat. Controverse autour de la dette wallonne
Piron, Damien ULg

Conference (2014, June 03)

Detailed reference viewed: 11 (2 ULg)
See detailRay tracing enhancement for space thermal analysis: isocell method
Jacques, Lionel ULg; Masset, Luc ULg; Kerschen, Gaëtan ULg

in Sarler, Bozidar; Massaroti, Nicola; Nithiarasu, Perumal (Eds.) Third International Conference on Computational Methods for Thermal Problems (2014, June 02)

The finite element method (FEM) is widely used in mechanical engineering, especially for space structure design. However, FEM is not yet often used for thermal engineering of space structures where the ... [more ▼]

The finite element method (FEM) is widely used in mechanical engineering, especially for space structure design. However, FEM is not yet often used for thermal engineering of space structures where the lumped parameter method is still dominant. Radiative exchange factors (REFs) are usually computed through Monte Carlo ray-tracing. Due to the large number of elements composing a FE model, the computation of the REFs is prohibitively expensive. The developments of the new Isocell quasi-Monte Carlo ray tracing method are presented. The Isocell method enhances the uniformity of the generated quasi-random sequence of ray directions and leads to faster convergence. It is associated with different surface sampling to derive the REFs. The method is benchmarked against ESARAD, the standard ray-tracing engine for thermal analysis used in the European aerospace industry. Various geometries are used. In particular, one entrance baffle of the Extreme Ultraviolet Imager (EUI) instrument developed at the Centre Spatial de Liège in Belgium is used. The EUI instrument of the Solar Orbiter European Space Agency mission and will be launched in a Sun-centered 0.28 perihelion orbit in 2018. [less ▲]

Detailed reference viewed: 17 (3 ULg)
Full Text
Peer Reviewed
See detailSIMPLIFIED SEISMIC ANALYSIS OF LOCK GATES
Buldgen, Loïc ULg; Degée, Hervé ULg; Lesourne, Hervé et al

in PIANC 2014 Conference (2014, June 02)

The paper deals with the seismic design of lock gates. When such structures are submitted to an earthquake, the water contained in the chamber is responsible for an additional hydrodynamic pressure acting ... [more ▼]

The paper deals with the seismic design of lock gates. When such structures are submitted to an earthquake, the water contained in the chamber is responsible for an additional hydrodynamic pressure acting on the gate. This one is the sum of three different parts, respectively called the convective, rigid and flexible contributions. The two first ones have already been extensively studied in the literature, but the flexible part is more difficult to assess as it is largely influenced by the coupling occurring between the fluid and the gate. To overcome this difficulty, it is of course possible to use finite elements software, but doing so is not always convenient. This is why some research have been undertaken to provide a rapid way for approximating the flexible pressure on lock gates. This is achieved by applying the analytical approach that is shortly presented in this paper. As a matter of validation, the results obtained through this simplified procedure are compared to numerical solutions. The agreement between both of them is found to be satisfactory. [less ▲]

Detailed reference viewed: 16 (5 ULg)
Full Text
See detailLes déterminants de la désinsertion professionnelle
Mairiaux, Philippe ULg

Conference (2014, June 02)

Detailed reference viewed: 21 (1 ULg)
See detailComparison of Indicators to Evaluate the Resilience of Lab Scale Continuously Stirred Anaerobic Reactors Submitted to Biological Dysfunctions
Lemaigre, Sébastien; Adam, Gilles ULg; Goux, Xavier et al

Poster (2014, June 02)

Detailed reference viewed: 11 (0 ULg)
Full Text
Peer Reviewed
See detailDe la matière à l'espace: une voie d'intégration numérique et matérielle
Delvaux, Frederic ULg; Bianchi, Romuald ULg; Jancart, Sylvie ULg

in Kubicki, Sylvain; Halin, Gilles; Bignon, Jean-CLaude (Eds.) Scan 14 séminaire de conception architecturale numérique : Interaction(s) des maquettes numériques (2014, June 01)

From a collaboration of formal and architectural research between architect and artist, we present the summary of an experimental approach that illustrates the creation and construction of a functional ... [more ▼]

From a collaboration of formal and architectural research between architect and artist, we present the summary of an experimental approach that illustrates the creation and construction of a functional space, located at the borders of the sculpture and the architecture. We present a look at the method, according to a revised approach to digital modeling / re-design. This has been an exploratory approach through the study of three generic models of the form. We present the experimental method, the selection of relevant parameters in form finding coupled with the integration of material and physical data specific to the object. We also expose the benefits of this approach, its limitations and the possibilities it offers as a generic point of view. [less ▲]

Detailed reference viewed: 20 (4 ULg)
Full Text
See detailHOLOCENE DUST RECORD IN A BELGIAN PEAT BOG: MULTIPROXY GEOCHEMICAL APPROACH
Allan, Mouhamd ULg; gael, le roux; Fagel, Nathalie ULg et al

in dust 2014, Book of ABSTRACTS, International Conference on ATMOSPHERIC DUST (2014, June 01)

Ombrotrophic peatlands are unique environmental archives of natural and anthropogenic atmospheric dust deposition. Their surface layers are exclusively fed by atmospheric inputs. A peat bog core from ... [more ▼]

Ombrotrophic peatlands are unique environmental archives of natural and anthropogenic atmospheric dust deposition. Their surface layers are exclusively fed by atmospheric inputs. A peat bog core from Misten in Eastern Belgium southern covering the last 7500 years (dated by 210Pb and 14C methods) was investigated to reconstruct dust depostion based on a combination of the Rare Earth Elements (REE) and lithogenic elements concentrations, as well as Nd and Pb isotopes data. Nd isotope signature was used to decipher between local and distal dust supplies, the Pb isotopes to trace the antropogenic influences. Peat humification was used to evaluate hydroclimatic conditions. Dust fluxes show pronounced increase at 3200-2800BC, 600BC, AD600, 1000AD, 1200AD and from 1700 AD. Lead isotope signatures are consistent with local and regional contamination by coal combustion and smelting activities. The Nd values show large variability, between -5 and –13, identifying three major sources of dust: local soils, distal volcanic and desert particles. Our results are in agreement with atmospheric reconstructions from other continental archives, confirming that the Misten peat is a valid archive for dust deposition. The approach combining geochemical elementary content and isotope data in ombrotrophic peat allows to decipher between dust flux changes related to human and climate forcing. [less ▲]

Detailed reference viewed: 18 (3 ULg)
Full Text
Peer Reviewed
See detailFlanders Ahead… Wallonia Behind (But Catching Up). Reconstructing Communities through Science, Technology, and Innovation Policymaking
Charlier, Nathan ULg; Van Oudheusden, Michiel ULg

Conference (2014, June)

Abstract Drawing on a documentary analysis of two socio-economic policy programs, one Flemish (“Vlaanderen In Actie”; VIA), the other Walloon (“Marshall Plans”; MPs), and a discourse analysis of how these ... [more ▼]

Abstract Drawing on a documentary analysis of two socio-economic policy programs, one Flemish (“Vlaanderen In Actie”; VIA), the other Walloon (“Marshall Plans”; MPs), and a discourse analysis of how these programs are received in one Flemish and one Francophone quality newspaper, this paper illustrates how Flanders and Wallonia both seek to become top-performing knowledge-based economies (KBEs). The paper discerns a number of discursive repertoires, such as “Catching up,” which Flemish and Walloon policy actors draw on to legitimize or question the transformation of Flanders and Wallonia into KBEs. The “Catching up” repertoire places Flanders resolutely ahead of Wallonia in the global race towards knowledge, excellence, and science-driven innovation, but suggests that Wallonia may, in due course overtake Flanders as a top-competitive region. Given the expectations and/or fears that “Catching up” evokes among Flemish and Walloon policy actors, the repertoire serves these actors as a flexible discursive resource to make sense of, and shape, their collective futures, and thus their identities. By rendering explicit how Flanders and Wallonia each acquire a distinct identity through the global KBE, the paper underlines the simultaneity of, and the interplay between, globalizing forces and particularizing tendencies and illuminates the political, nation-building and identity-building functions of science, technology, and innovation. The paper starts from the following preliminary observations. While both the VIA plan and the MPs emphasize the need of transforming Flanders and Wallonia into KBEs in order meet the demands of globalization (OECD 1996), the plans adopt a different tone and stance. The Flemish plan repeatedly states the need of transforming Flanders into “a top region, not only in Europe, but in the world, particularly in the social and economic field” (VIA, 2006: 4). It also states that Flanders is already prosperous and already has many strengths, but that the welfare and prosperity of Flanders are “under threat” in a “challenging global economic environment” (2). The message is thus that Flanders is doing relatively well in the global economy, but that it must do even better if it is to maintain its competitive edge and its welfare. By contrast, the MP is framed from the perspective of Walloon recovery and “redressement.” Although the term “Marshall Plan” evidently brings to mind the European Recovery Program for rebuilding Western Europe after World War II, recovery also refers to the period of prosperity before the World Wars, when Wallonia was one of the most economically advanced industrial regions in Europe. The MP suggests that Wallonia’s glorious past (“le passé glorieux”) can be rewon, if the Walloons deploy every tool they can muster and work together to “relaunch” the Walloon economy (3). To incite joint action, the MP urges the Walloons to become the architects of their own fate. This aspiration is clearly expressed in the opening sentence of the first MP plan: “The federalization [of Belgium; by which is meant the regionalization of policy and competences] bestows the Walloons with political autonomy, which renders them responsible for their own destiny.” At the same time, this statement reads as a call to independence, as the Walloons are bestowed with political autonomy (by the Flemings, who have repeatedly pushed for the dismantling of Belgium as a unitary state). As the above excerpts from the Flemish and Walloon policy plans indicate, VIA and the MPs characterize a state of political and economic affairs, take position in relation to these affairs, and, most importantly, envision a prosperous future for the Flemish and Walloon region, respectively. The plans are thus driven by expectations, visions and values, as well as fears. They mobilize arguments, explanations, evaluations, descriptions and prescriptions, sometimes by drawing on tropes or stereotypes, anecdotes, and illustrations. As the plans also indicate, transforming Flanders and Wallonia into top KBE regions does not happen by itself. For instance, while the VIA plan describes Flemings as entrepreneurs, it also states that “we must dare to be entrepreneurial” (3). Similary, the MP urges Walloon citizens to change their “état d’esprit” or mindset, if economic growth is to ensue (3). Thus, identity construction and transformation are in order both in Flanders and in Wallonia. The above observations serve as starting points for our media analysis. As we want to know whether, and how, these particular conceptions of the nation/region are picked up in press reporting on STI policies, we ask the following interrelated questions: How are the Flemish (VIA) and Walloon STI policies (MPs) received in the Flemish and Francophone press? Do we discern in the press the same notions of identity as in the policy programs? Are these notions reproduced, problematized or transformed? If so, in what ways? What does this mean for Flemish and Walloon identity construction, and for the construction of “Belgium” at large? Recognizing the role of “institutions of power” (e.g. language, media, technologies) in articulating nationalism (Anderson 1991: 163; Billig 1995: 11), our analysis conceives of journalists and the press as potential policy agenda setters and opinion makers, as the press potentially reproduces and redefines political identities. As this paper will illustrate, the Flemish and Francophone press speak out on issues of collective identity and also offer various policymakers a platform to express their views on regional economic development, STI, and the state. Thus, from our perspective, policymaking is not only the prerogative of mandated policymakers, but of journalists and other opinion leaders (e.g. captains of industry) as well (Lenschow & Sprungk 2010). To enable analysis, we draw on a range of literatures, including science and technology studies, discourse analysis, and media analyses. Our approach is interpretive and interactionist, as it assumes that realities (e.g. identities, nations, as well as practices and materialities) are socially constructed rather than exist as objective phenomenon that can be discovered through empirical testing (Fischer 2003: 118). Hence, we ask how identity is created, structured, maintained, or conversely deconstructed, resisted, and challenged. Our aim is thus not to uncover an objective reality behind identity, but to understand how identities are collectively made and remade on a continuous basis. To this end, we draw on the notion of “coproduction” (Jasanoff 2006: 2) to empirically demonstrate how STI and nationalism are “coproduced” through technoscientific practices (Felt 2013). In what follows, we first present, discuss, and situate Flemish and Walloon STI policies in time and place, as a means of contextualizing the “nationalisms” inscribed in the VIA plan and MPs. Next, we present our methodological framework for discourse and media analysis, our data, and key findings. Upon drawing together these findings, we single out the storyline of “Catching up” as an important discursive backdrop against which processes of collective identity construction play out through STI policymaking and press reporting. We conclude by tying our findings into a broader discussion about the place of Belgium in Europe and the world, as nation states are constantly (re)defined in terms of their constituent segments and overarching structures, including the KBE. The paper’s topics resonate with the overall conference theme and specifically tie into the following conference strands: • Policy emergence, implementation, diffusion and transfer • National science policies and the global scientific enterprise • The multi-level governance of research and innovation and the challenge of co-ordination Keywords: Flanders, Identity, Knowledge-based economy, Science and technology policy, Wallonia. References Anderson, B. (1991), Imagined Communities. Reflection on the Origin and Spread of Nationalism. London, Verso. Billig, M. (1995), Banal Nationalism. London, Sage. Felt, U. (2013), “Keeping Technologies Out: Sociotechnical imaginaries and the formation of a national technopolitical identity,” Pre-print; Published by the Department of Social Studies of Science, University of Vienna, February 2013; http://sciencestudies.univie.ac.at/publications Fischer, F. (2003), Reframing Public Policy. Discursive Politics and Deliberative Practices. Oxford, UK, Oxford University Press. Flanders in Action (VIA); www.vlaandereninactie.be Jasanoff, S. 2006. The idiom of co-production. In: Jasanoff, S., Ed., States of Knowledge. The Coproduction of Science and Social Order. New York, Routledge, 1-12. Lenschow, A. & Sprungk, C. (2010), “The Myth of a Green Europe,” Journal of Common Market Studies, 48(1), 133-154. OECD (1996), The Knowledge Based Economy, OECD/GD, (96)102. Plan Marshall (MP); http://www.wallonie.be/fr/actualites/plan-marshall-2022 [less ▲]

Detailed reference viewed: 13 (4 ULg)
Full Text
Peer Reviewed
See detailResearch of phosphate accumulating microorganisms from WWTPs for the recovery of phosphorus from organic wastes (3BV.3.47)
Tarayre, Cédric ULg; Michels, Evi; Buysse, Jeroen et al

Poster (2014, June)

Many wastes containing reusable components, such as nitrogen, phosphorus and potassium, are not exploited through ideal processes. As an example, in Wallonia (Belgium), the main treatment applied to ... [more ▼]

Many wastes containing reusable components, such as nitrogen, phosphorus and potassium, are not exploited through ideal processes. As an example, in Wallonia (Belgium), the main treatment applied to sewage sludge consists in incinerating the material. Such a process is chosen when the heavy metals are too concentrated in the sludge, preventing an agricultural use. However, sewage sludge, as well as manure, slurry and digestate, contain notable amounts of nutrients (nitrogen, phosphorus and potassium). Some Waste Water Treatment Plants (WWTPs) are actually designed in order to promote Phosphate Accumulating Organisms (PAOs), able to store or release phosphorus in accordance with the environmental conditions. The aim of this work is to isolate PAOs from WWTPs and evaluate their applicability to phosphorus recovery from organic wastes. Metagenomics and metabolic properties are also considered. This work is supported by the BioRefine Project, a European project in which various member states focus on recovery of inorganics from organic wastestreams. [less ▲]

Detailed reference viewed: 8 (0 ULg)
See detailL’effet des dispositifs d’intermédiation sur les trajectoires professionnelles des travailleurs. Le cas d’un bureau de recrutement, recherche et sélection de personnel.
Gérard, Julie ULg

Conference (2014, June)

Au cours de ces dernières années, le souci d’allier flexibilité et sécurité au travail a conduit à l’essor considérable des métiers de l’intermédiation (Orianne et Maroy, 2008). En particulier dans le ... [more ▼]

Au cours de ces dernières années, le souci d’allier flexibilité et sécurité au travail a conduit à l’essor considérable des métiers de l’intermédiation (Orianne et Maroy, 2008). En particulier dans le domaine de l’accompagnement et du développement de carrière, divers dispositifs privés d’aide et de suivi ont vu le jour afin de contribuer à l’amélioration des conditions de travail et d’assister les travailleurs dans leurs transitions professionnelles. Par leur action, ces nouveaux dispositifs n’hésitent pas à complexifier les temporalités sociales en créant de nouvelles opportunités d’emploi et en redéfinissant les rythmes de carrière. À l’aide d’une étude de cas dans le secteur du recrutement belge, nous analyserons la capacité d’un processus de mise en emploi à remplir de tels objectifs dans un contexte de gestion mixte du marché du travail. Approchée d’une manière qualitative (entretiens semi-directifs et observations), nous étudierons l’apport de cette agence de placement au travers d’un cadre théorique qui intègre les concepts de dispositif (Foucault, 1977 ; Peeters et Charlier, 1999 ; Raffnsoe, 2008) et de réseaux sociaux (Grossetti 2005, 2008 et 2011). Nous montrerons qu’un plus de régir l’offre et la demande de travail, ce dispositif d’intermédiation, par son système de cooptation et son accompagnement de carrière, assure la fluidification du marché et sécurise la dynamique des transitions professionnelles. [less ▲]

Detailed reference viewed: 14 (2 ULg)
Full Text
Peer Reviewed
See detailÉtude des changements de circulation au-dessus de l'océan Austral en été
Belleflamme, Alexandre ULg; Fettweis, Xavier ULg; Erpicum, Michel ULg

in Camberlin, Pierre; Richard, Yves (Eds.) Actes du XXVIIème colloque de l'Association de Climatologie - Climat : système & interactions (2014, June)

Over the five last decades, the reanalyses (ERA and NCEP/NCAR) show a strengthening of the pressure gradient between the southern hemisphere subtropical anticyclone belt and the southern circumpolar lows ... [more ▼]

Over the five last decades, the reanalyses (ERA and NCEP/NCAR) show a strengthening of the pressure gradient between the southern hemisphere subtropical anticyclone belt and the southern circumpolar lows during summer. With the help of an automatic circulation type classification, we show that the strengthening of the pressure gradient is generalised to all circulation types and, paradoxically, it does not cause circulation changes. It is probably implied by the strengthening of the temperature gradient between the tropics and the South Pole, without consequences on the general circulation. Our classification also allows a successful comparison between the two reanalyses in a region where the observation data are rare. [less ▲]

Detailed reference viewed: 14 (2 ULg)
Full Text
See detailBacteria, bonds between classical karsts and karsts in silicated non carbonated rocks ?
Willems, Luc ULg

Poster (2014, June)

For several years, similar karsts to those found in the limestone have been observed in various silicated non-carbonated rocks. Several morphological arguments show that a complete dissolution of rocks is ... [more ▼]

For several years, similar karsts to those found in the limestone have been observed in various silicated non-carbonated rocks. Several morphological arguments show that a complete dissolution of rocks is necessary to explain the formation of some caves and other related forms independently of hydrotermalisme phenomena. However, the physico-chemical processes generally considered do not provide a satisfactory explanation to this dissolution. Bacterial activity found deep in many lithologies provides a solution to this apparent contradiction. [less ▲]

Detailed reference viewed: 8 (0 ULg)
Full Text
See detailThe X-ray emission of the massive stars population in Cyg OB2
Rauw, Grégor ULg; Nazé, Yaël ULg; Wright, Nick et al

Poster (2014, June)

Cygnus OB2 contains a wealth of massive stars of spectral types O, B and Wolf-Rayet. In the framework of a Chandra legacy program to study the X-ray emission from this important association, we have ... [more ▼]

Cygnus OB2 contains a wealth of massive stars of spectral types O, B and Wolf-Rayet. In the framework of a Chandra legacy program to study the X-ray emission from this important association, we have studied the X-ray properties of its massive stars population. We show that the O-stars in Cyg OB2 follow a well-defined scaling relation between their X-ray and bolometric luminosities: log(Lx/Lbol) = −7.2 ± 0.2. Except for the brightest O-star binaries, there is no general X-ray overluminosity due to colliding winds in O-star binaries. Roughly half of the known B-stars in the surveyed field are detected, but they fail to display a clear relationship between Lx and Lbol. Out of the three WR stars in Cyg OB2, probably only WR144 is itself responsible for the observed level of X-ray emission, at a very low log(Lx/Lbol) = −8.8±0.2. The X-ray emission of the other two WR-stars (WR145 and 146) is most probably due to their O-type companion along with a moderate contribution from a wind-wind interaction zone. [less ▲]

Detailed reference viewed: 11 (1 ULg)
Peer Reviewed
See detailGenetic diversity, structure and parentage analysis within several European apple germplasm collections assessed by microsatellite markers
Durel, Charles-Eric; Denancé, Caroline; Ravon, Elisa et al

Conference (2014, June)

Detailed reference viewed: 23 (1 ULg)
Full Text
Peer Reviewed
See detailDistributed Model-free Control of Photovoltaic Units for Mitigating Overvoltages in Low-Voltage Networks
Aristidou, Petros ULg; Olivier, Frédéric ULg; Hervas, Maria Emilia et al

in Proc. of CIRED 2014 workshop (2014, June)

In this paper, a distributed model-free control scheme to mitigate overvoltage problems caused by high photovoltaic generation in low-voltage feeders is proposed. The distributed controllers are ... [more ▼]

In this paper, a distributed model-free control scheme to mitigate overvoltage problems caused by high photovoltaic generation in low-voltage feeders is proposed. The distributed controllers are implemented on the photovoltaic inverters and modulate the active and reactive power injected into the network. In particular, they direct photovoltaic units first to consume reactive power and, if necessary, curtail active power generation to reduce high voltages in the feeder. [less ▲]

Detailed reference viewed: 59 (18 ULg)
Full Text
Peer Reviewed
See detailOn the Performance of the LISP Beta Network
Coras, Florin; Saucez, Damien; Iannone, Luigi et al

in IFIP Networking (2014, June)

The future Internet has been a hot topic during the past decade and many approaches towards this future Internet, ranging from incremental evolution to complete clean slate ones, have been proposed. One ... [more ▼]

The future Internet has been a hot topic during the past decade and many approaches towards this future Internet, ranging from incremental evolution to complete clean slate ones, have been proposed. One of the proposition, LISP, advocates for the separation of the identifier and the locator roles of IP addresses to reduce BGP churn and BGP table size. Up to now, however, most studies concerning LISP have been theoretical and, in fact, little is known about the actual LISP deployment performance. In this paper, we fill this gap through measurement campaigns carried out on the LISP Beta Network. More precisely, we evaluate the performance of the two key components of the infrastructure: the control plane (i.e., the mapping system) and the interworking mechanism (i.e., communication between LISP and non-LISP sites). Our measurements highlight that performance offered by the LISP interworking infrastructure is strongly dependent on BGP routing policies. If we exclude misconfigured nodes, the mapping system typically provides reliable performance and relatively low median mapping resolution delays. Although the bias is not very important, control plane performance favors USA sites as a result of its larger LISP user base but also because European infrastructure appears to be less reliable. [less ▲]

Detailed reference viewed: 41 (7 ULg)
Full Text
Peer Reviewed
See detailESTUDIO ANTE Y POST-MORTEM DE LAS CARACTERÍSTICAS FISIOPATOLÓGICAS DEL TRACTO GENITAL Y SUS FACTORES DE RIESGO EN VACAS LECHERAS EN EL SUR DE VIETNAM
Nguyen, Kien Cuong; Tomas Mulet, Cristina; Okouyi-Mfoumou, Marcel et al

Conference (2014, June)

Detailed reference viewed: 35 (5 ULg)
Full Text
See detailReceptor expression in craniopharyngiomas causing tumor growth in pregnancy: case report and review of the literature
VROONEN, Laurent ULg; TOME, Monica; THIRY, Albert ULg et al

in Abstract book : 57èmes Journées Internationales d'Endocrinologie Clinique - Henri-Pierre Klotz (2014, June)

Detailed reference viewed: 4 (0 ULg)
Peer Reviewed
See detailMembrane interactions of cyclic lipodepsipeptides from the viscosin group
Geudens, Niels; Feher, Krisztina; De Vleeschouwer et al

Poster (2014, June)

Detailed reference viewed: 7 (0 ULg)
Full Text
Peer Reviewed
See detailOn the Quality of BGP Route Collectors for iBGP Policy Inference
Cittadini, Luca; Vissicchio, Stefano; Donnet, Benoît ULg

in IFIP Networking (2014, June)

A significant portion of what is known about Internet routing stems out from public BGP datasets. For this reason, numerous research efforts were devoted to (i) assessing the (in)completeness of the ... [more ▼]

A significant portion of what is known about Internet routing stems out from public BGP datasets. For this reason, numerous research efforts were devoted to (i) assessing the (in)completeness of the datasets, (ii) identifying biases in the dataset, and (iii) augmenting data quality by optimally placing new collectors. However, those studies focused on techniques to extract information about the AS-level Internet topology. In this paper, we show that considering different metrics influences the conclusions about biases and collector placement. Namely, we compare AS-level topology discovery with \iac inference. We find that the same datasets exhibit significantly diverse biases for these two metrics. For example, the sensitivity to the number and position of collectors is noticeably different. Moreover, for both metrics, the marginal utility of adding a new collector is strongly localized with respect to the proximity of the collector. Our results suggest that the ``optimal'' position for new collectors can only be defined with respect to a specific metric, hence posing a fundamental trade-off for maximizing the utility of extensions to the BGP data collection infrastructure. [less ▲]

Detailed reference viewed: 35 (11 ULg)
Full Text
Peer Reviewed
See detailInhibition of PDH Kinase as a new therapeutic target for Age-related Macular Degeneration (AMD)
Arslan, Deniz ULg; Pirotte, Bernard ULg; De Tullio, Pascal ULg et al

Poster (2014, June)

Metabolomics is one of the most recent technologies in the world of Omics sciences. It aims at studying metabolome, which is composed of small molecular weight organic molecules (called metabolites) of a ... [more ▼]

Metabolomics is one of the most recent technologies in the world of Omics sciences. It aims at studying metabolome, which is composed of small molecular weight organic molecules (called metabolites) of a cell, an organism or a biological system. This approach gives rise to a growing number of applications in many areas, such as biomarkers discovery, clinical studies, drug efficacy and toxicity evaluation, diagnostic tools, quality control. One of the most interesting features of metabolomics is its capability to extract biochemical information reflecting biological events and then to be a powerful tool in the knowledge of the aetiology of some pathologies. Indeed, it is clear that every disease could alter more or less drastically the metabolic profile of the patients. Then a metabolomics approach could highlight the biochemical pathways affected and could allow the identification of new putative therapeutic strategies or targets that could be useful in a new drug discovery strategy. As proteomics, metabolomics approach represents a new and powerful tool for Medicinal Chemistry. Age-related Macular Degeneration (AMD) is a leading cause of vision loss in the western world among people aged 50 or older. 90% of all vision loss due to AMD results from the exudative form, which is characterized by choroidal neovascularization (CNV). Age-related changes that induce pathologic CNV are incompletely understood. A successful application of anti-VEGF approaches in the clinic is obviously a turning point in AMD treatment. Nevertheless, despite such important advances, critical issues remain to be addressed. To better understand the aetiology of this pathology, we used and improved a murine model of laser-induced choroidal neovascularization and applied a 1H NMR metabolomics study. This approach leads to the emergence of different putative biomarkers and to the validation of the CNV model for an experimental study of AMD. Among these “biomarkers”, lactate appears to be clearly involved in the development of AMD. The modulation of their plasma concentration by treatment of the animals with synthetic compounds and more specifically Pyruvate DesHydrogenase Kinase inhibitors (PDHK) significantly decrease the impact of laser induced CNV. Starting from these results, the development of new PDHK inhibitors could open the way to innovative treatment opportunities in AMD disease. [less ▲]

Detailed reference viewed: 21 (11 ULg)
Full Text
Peer Reviewed
See detailThe Impact of Dual-Tasking on Verbal Short-Term Memory in Children with Specific Language Impairment
Leclercq, Anne-Lise ULg; Maillart, Christelle ULg; Lange, Manon et al

Poster (2014, June)

Limitations in general processing capacities have been proposed to account for poor verbal short-term memory (STM) performances in children with SLI. Previous studies observed that STM performances ... [more ▼]

Limitations in general processing capacities have been proposed to account for poor verbal short-term memory (STM) performances in children with SLI. Previous studies observed that STM performances decreased to a larger extent in children with SLI as compared to their unaffected peers when the processing demands of the task increased (e.g., Ellis Weismer, et al., 2005; Montgomery, 2000a,b). However, in these studies, the increase in attention processing demands went with an increase in linguistic processing demands. Since children with SLI experience language processing problems, it is not clear whether general attention problems or language processing problems are at the root of their larger performance decrease as compared to their unaffected peers. This study aims at directly assessing the hypothesis that limitations in general attentional capacity are at the root of poor STM performances in children with SLI, using an attention demanding visual search task administered concurrently with nonword repetition task. Twenty-three children with SLI, 23 age-matched children, and 23 nonword span-matched children performed immediate serial recall tasks of nonwords. The STM lists were presented either alone or concurrently with the target detection task. Moreover, the target detection task either stopped or continued when children had to recall the nonwords. Results show a main effect of dual task condition on both nonword repetition accuracy and target detection accuracy. Performances in children with SLI were not more affected than in controls by the necessity to perform a concurrent visual attention task during nonword lists presentation. However, nonword recall seemed to be more challenging for children with SLI than for age-matched controls. Indeed, performances in the visual task were lower in children with SLI than in their age-matched controls, but not as compared to nonword span-matched controls. [less ▲]

Detailed reference viewed: 18 (1 ULg)
Full Text
Peer Reviewed
See detailThe role of segmentation and investor recognition through the lens of cross-listing activity
Mouchette, Xavier ULg; Carrieri, Francesca; Muller, Aline ULg

Conference (2014, June)

Detailed reference viewed: 11 (5 ULg)
Full Text
Peer Reviewed
See detailThe Call for project proposals « Let’s live my village »: between free interpretations and compulsory readings regarding innovation and convivial village ambiance in Wallonia.
Schmitz, Serge ULg

in Les campagnes: espaces d'innovation dans un monde urbain (2014, June)

The paper scrutinizes 186 rural development projects selected on the short list of the first and second “Lets’ live my village!” calls. It examines trends concerning rural community life and the identity ... [more ▼]

The paper scrutinizes 186 rural development projects selected on the short list of the first and second “Lets’ live my village!” calls. It examines trends concerning rural community life and the identity of the leaders/brokers. It pays attention to the way that associations define rurality. Question 14 of the application form « Does your association act in rural areas? Explain” is the main source of information for content analysis and contingency tables [less ▲]

Detailed reference viewed: 16 (5 ULg)
Full Text
Peer Reviewed
See detailArrival of european eel in Belgian Part of the Meuse: who and how are they?
Nzau Matondo, Billy ULg; Benitez, Jean-Philippe ULg; Dierckx, Arnaud ULg et al

in Proceedings of the 10th International Conference on Ecohydraulics (2014, June)

Detailed reference viewed: 14 (4 ULg)
Peer Reviewed
See detailETEROGENEITÀ GENETICA DI NOROVIRUS BOVINI IDENTIFICATI IN ITALIA
Di Felice, Eliabetta; Di Profio, Federica; Melegari, Irene et al

Poster (2014, June)

I norovirus (NoV) sono piccoli virus a RNA monocatenario appartenenti alla famiglia Caliciviridae. Sulla base dell’analisi di sequenza del gene ORF2 codificante per la proteina capsidica VP1, i NoV sono ... [more ▼]

I norovirus (NoV) sono piccoli virus a RNA monocatenario appartenenti alla famiglia Caliciviridae. Sulla base dell’analisi di sequenza del gene ORF2 codificante per la proteina capsidica VP1, i NoV sono attualmente classificati in sei genogruppi (G), con GI, GII e GIV responsabili di gastroenterite nell’uomo. Calicivirus enterici morfologicamente simili a NoV umani sono stati identificati per la prima volta in vitelli diarroici nel Regno Unito nel 1978 e in Germania nel 1980. Il sequenziamento nucleotidico dell’intero genoma ha permesso di classificare i NoV bovini (BoNoV) all’interno del genogruppo III in due genotipi, GIII.1 (prototipo Bo/Jena/80/DE) e GIII.2 (prototipo Bo/Newbury/76/UK). I BoNoV hanno una diffusione mondiale con una maggiore prevalenza di virus GIII.2-like. Tuttavia, studi recenti basati sull’analisi nucleotidica a livello della giunzione fra la polimerasi (RdRp) ed il capside, hanno dimostrato la circolazione di ceppi ricombinanti. Nel presente lavoro vengono riportati i risultati di un’indagine per la ricerca e tipizzazione di BoNoV condotta su quattro allevamenti bovini ubicati nelle province di Teramo e Pescara. A tal fine, 104 tamponi rettali collezionati da vitelli asintomatici sono stati sottoposti a nested RT-PCR impiegando due set di primer specifici per BoNoV in grado di amplificare un frammento di 326 bp della RdRp. L’RNA di BoNoV è stato identificato nel 10,5% (11/104) degli animali testati. L'analisi di sequenza ha evidenziato per nove sequenze un’elevata identità nucleotidica (nt) (88-96%) con i ceppi GIII.2-like, mentre per due è stata rilevata la maggiore identità (87-90% nt) con i BoNoV GIII.1-like. Per sette ceppi è stata ottenuta anche una sequenza di circa 750 bp che includeva oltre che la regione parziale della RdRp, la regione 5’ capsidica. Sulla base dell’analisi molecolare, cinque ceppi sono risultati strettamente correlati con BoNoV GIII.2-like, mentre solo uno dei due ceppi con polimerasi GIII.1-like, ha mostrato la maggiore identità nucleotidica nei confronti di BoNoV appartenenti al genotipo 1. Il ceppo 80/TE/IT che possedeva una polimerasi GIII.1-like, a livello capsidico ha mostrato la più alta identità con ceppi GIII.2-like, suggerendo un fenomeno di ricombinazione a livello della giunzione ORF1/ORF2. [less ▲]

Detailed reference viewed: 5 (0 ULg)
Peer Reviewed
See detailModeling of the Iturinic Antimicrobial Lipopeptide Mycosubtilin at Interfaces
Loison, Claire; Nasir, Mehmet Nail ULg; Benichou, Emmanuel et al

Conference (2014, June)

Detailed reference viewed: 7 (0 ULg)
See detailCrime Hotspots In Belgium: Spatial He terogeneity In The Multivariate Regression Model?
Trotta, Marie ULg

Conference (2014, June)

Place attractiveness is an important property to consider when modelling the spatial behaviour of a serial offender. Small spatial units are privileged in the recent literature to study the crime ... [more ▼]

Place attractiveness is an important property to consider when modelling the spatial behaviour of a serial offender. Small spatial units are privileged in the recent literature to study the crime concentration-urban backcloth relationship, with the drawback of focusing on a single city. However, the urban backcloth is also shaped by the inter-cities and city-hinterland relationships. Our objective is to model the concentration of sexual offences for entire Belgium, at the very precise scale of the statistical sector in order to take into account the role of the urban hierarchy. Methods: We analyse the ViCLAS data for Belgium between 2004 and 2011. Specifically, we study the relationship between the concentration of initial contact scenes and socio-economic characteristics and facilities of the statistical sector, using two spatial models. First, we computed a spatial lag zero-inflated model (ZINB) in order to evaluate the global predictive capacities of the model. Then, a Poisson geographically-weighted regression (GWR) was run to study the spatial heterogeneity for each of the explanatory variables. Results: The zero-inflated negative binomial model with spatial lag recovers the neighbourhood environmental quality, the concentration of economic and cultural activities, and drinking places as major significant factors (Mc Fadden’s pseudo-r² of 0.2). The Poisson geographically-weighted regression underestimates the crime concentrations but highlights the spatial heterogeneity [less ▲]

Detailed reference viewed: 20 (8 ULg)
Full Text
Peer Reviewed
See detailThe grassland model intercomparison of the MACSUR (Modelling European Agriculture with Climate Change for Food Security) European knowledge hub
Ma, Shaoxiu; Acutis, Marco; Barcza, Zoltan et al

in Proceedings of the 7th International Congress on Environmental Modelling and Software (iEMSs) June 15-19, 2014, San Diego, California, USA (2014, June)

Detailed reference viewed: 9 (2 ULg)
Full Text
Peer Reviewed
See detailAnalysis versus synthesis for trending of gas-path measurement time series
Borguet, Sébastien ULg; Léonard, Olivier ULg; Dewallef, Pierre ULg

in Proceedings of ASME Turbo Expo 2014 (2014, June)

Gas-path measurements used to assess the health condition of an engine are corrupted by noise. Generally, a data cleaning step occurs before proceeding with fault detection and isolation. Classical linear ... [more ▼]

Gas-path measurements used to assess the health condition of an engine are corrupted by noise. Generally, a data cleaning step occurs before proceeding with fault detection and isolation. Classical linear filters such as the exponentially weighted moving average filter are traditionally used for noise removal. Unfortunately, these low-pass filters distort trend shifts indicative of faults, which increases the detection delay. The present paper investigates two new approaches to non-linear filtering of time series. On one hand, the synthesis approach reconstructs the signal as a combination of elementary signals chosen from a pre-defined library. On the other hand, the analysis approach imposes a constraint on the shape of the signal (e.g., piecewise constant). Both approaches incorporate prior information about the signal in a different way, but they lead to trend filters that are very capable at noise removal while preserving at the same time sharp edges in the signal. This is highlighted through the comparison with a classical linear filter on a batch of synthetic data representative of typical engine fault profiles. [less ▲]

Detailed reference viewed: 7 (2 ULg)
Full Text
Peer Reviewed
See detailAn Investigation into the Influence of External Walls Reflectivity on the Indoor Daylight Availability in Desert Climates
Hegazy, Mohamed Amer; Attia, Shady ULg

in Conference Proceedings: Building Simulation and Optimization 2014 (2014, June)

Hot arid climates are characterized by clear sunny sky most of the year time. Such climates affects the urban morphology, which requires sometimes dense urban fabric. Narrow streets have significant ... [more ▼]

Hot arid climates are characterized by clear sunny sky most of the year time. Such climates affects the urban morphology, which requires sometimes dense urban fabric. Narrow streets have significant effect on the amount of daylight permeating indoor residential zones, which may have a negative or positive effect on the overall visual performance. This paper studies the quantitative effect of using different Façade reflectivity ratios, under different street widths, on the indoor daylight autonomy. The researcher performed a parametric analysis using DIVA for Rhino simulation tool on a hypothetical residential building unit with various window ratios facing neighbouring buildings. Four main orientations were examined under different urban contexts and wall reflectivity. This paper aims to measure daylight autonomy and address possible strategies and solutions to achieve better daylighting that can be used by architects at early design stages of housing developments in the desert climates. [less ▲]

Detailed reference viewed: 19 (2 ULg)
Peer Reviewed
See detailPhilosophy of economic security of organization: The constructivist approach
Shutyak, Yuliya ULg

Conference (2014, June)

The purpose of this paper is to present the concept of economic security of the organization. Guiding by the constructivism approach, the author conducts a narrative literature review on economic security ... [more ▼]

The purpose of this paper is to present the concept of economic security of the organization. Guiding by the constructivism approach, the author conducts a narrative literature review on economic security of organization in parallel with well-known theories of business management.The presented in the paper ideas are an impulse for a new wave in organizational research basing on a new globalizing theoretical framework. The proposed approach to organizational management through the prism of security allows connecting disjoined concepts used in organizational studies and highlights aspects important for organizational survival and growth but mostly overlooked by scientists. The paper’s value consists in evolving of a relatively unexploited concept of economic security of the organization. [less ▲]

Detailed reference viewed: 11 (1 ULg)