References of "Unpublished conference/Abstract"      in Complete repository Arts & humanities   Archaeology   Art & art history   Classical & oriental studies   History   Languages & linguistics   Literature   Performing arts   Philosophy & ethics   Religion & theology   Multidisciplinary, general & others Business & economic sciences   Accounting & auditing   Production, distribution & supply chain management   Finance   General management & organizational theory   Human resources management   Management information systems   Marketing   Strategy & innovation   Quantitative methods in economics & management   General economics & history of economic thought   International economics   Macroeconomics & monetary economics   Microeconomics   Economic systems & public economics   Social economics   Special economic topics (health, labor, transportation…)   Multidisciplinary, general & others Engineering, computing & technology   Aerospace & aeronautics engineering   Architecture   Chemical engineering   Civil engineering   Computer science   Electrical & electronics engineering   Energy   Geological, petroleum & mining engineering   Materials science & engineering   Mechanical engineering   Multidisciplinary, general & others Human health sciences   Alternative medicine   Anesthesia & intensive care   Cardiovascular & respiratory systems   Dentistry & oral medicine   Dermatology   Endocrinology, metabolism & nutrition   Forensic medicine   Gastroenterology & hepatology   General & internal medicine   Geriatrics   Hematology   Immunology & infectious disease   Laboratory medicine & medical technology   Neurology   Oncology   Ophthalmology   Orthopedics, rehabilitation & sports medicine   Otolaryngology   Pediatrics   Pharmacy, pharmacology & toxicology   Psychiatry   Public health, health care sciences & services   Radiology, nuclear medicine & imaging   Reproductive medicine (gynecology, andrology, obstetrics)   Rheumatology   Surgery   Urology & nephrology   Multidisciplinary, general & others Law, criminology & political science   Civil law   Criminal law & procedure   Criminology   Economic & commercial law   European & international law   Judicial law   Metalaw, Roman law, history of law & comparative law   Political science, public administration & international relations   Public law   Social law   Tax law   Multidisciplinary, general & others Life sciences   Agriculture & agronomy   Anatomy (cytology, histology, embryology...) & physiology   Animal production & animal husbandry   Aquatic sciences & oceanology   Biochemistry, biophysics & molecular biology   Biotechnology   Entomology & pest control   Environmental sciences & ecology   Food science   Genetics & genetic processes   Microbiology   Phytobiology (plant sciences, forestry, mycology...)   Veterinary medicine & animal health   Zoology   Multidisciplinary, general & others Physical, chemical, mathematical & earth Sciences   Chemistry   Earth sciences & physical geography   Mathematics   Physics   Space science, astronomy & astrophysics   Multidisciplinary, general & others Social & behavioral sciences, psychology   Animal psychology, ethology & psychobiology   Anthropology   Communication & mass media   Education & instruction   Human geography & demography   Library & information sciences   Neurosciences & behavior   Regional & inter-regional studies   Social work & social policy   Sociology & social sciences   Social, industrial & organizational psychology   Theoretical & cognitive psychology   Treatment & clinical psychology   Multidisciplinary, general & others     Showing results 901 to 1000 of 16398     5 6 7 8 9 10 11 12 13 14 15     Validation d'une méthode d'analyse quantitative de l'équol par UPLC®-MS/MS dans le lait de vache - Application aux laits commercialisés en Wallonie (Belgique)Daems, Frédéric ; Lognay, Georges ; Romne, Jean-Michel et alConference (2015, May 27)Dans le cadre d’un projet intitulé «PhytoHealth », une méthode d’analyse quantitative de l’équol dans le lait a été développée et validée selon les recommandations de l’EMA/CVMP/VICH/463202/2009. Celle-ci ... [more ▼]Dans le cadre d’un projet intitulé «PhytoHealth », une méthode d’analyse quantitative de l’équol dans le lait a été développée et validée selon les recommandations de l’EMA/CVMP/VICH/463202/2009. Celle-ci est constituée d’une étape d’hydrolyse enzymatique, suivie d’une double extraction liquide/liquide et d’une analyse par chromatographie liquide ultra performante couplé à un spectromètre de masse en tandem (UPLC®-MS/MS). Une fois les différents paramètres tels que la fiabilité, sensibilité et/ou robustesse de la méthode confirmées, celle-ci a permis, pour la première fois, d’estimer la teneur en équol d’ échantillons de laits commercialisés en Wallonie. Une Cinquantaine de laits ont été prélevés aléatoirement dans les commerces durant une période définie. Tous les échantillons possédaient une teneur en équol ≥ 10ng.mL-1. En comparant les valeurs moyennes, on a constaté qu’il n’y avait pas de différence entre les 4 catégories de laits analysés (entier, demi-écrémé, écrémé et cru). Par contre, une différence hautement significative a pu être observée entre les laits provenant de la filière biologique et ceux de la filière conventionnelle. Dans le premier cas, les teneurs varient entre 10 et 50 ng.mL-1 par contre, dans le second, elles varient entre 70 et 130 ng.mL-1. Cet impact de la filière biologique sur la teneur en équol dans les laits a pu être confronté à d’autres études européennes et confirmé. [less ▲]Detailed reference viewed: 49 (6 ULg) Application du plan d’expérience de Box-Behnken et de la méthodologie des surfaces de réponses pour optimiser une méthode de quantification de phyto-œstrogènes dans les fourragesDaems, Frédéric ; Lognay, Georges ; Romnee, Jean-Michel et alConference (2015, May 27)Dans le cadre d’un projet de valorisation des prairies, intitulé « PhytoHealth », une méthode d’analyse quantitative constituée d’une étape d’extraction à l’aide d’un bain à ultrasons, suivi d’une ... [more ▼]Dans le cadre d’un projet de valorisation des prairies, intitulé « PhytoHealth », une méthode d’analyse quantitative constituée d’une étape d’extraction à l’aide d’un bain à ultrasons, suivi d’une hydrolyse enzymatique et d’une analyse par UPLC®-MS/MS a été développée pour assurer le dosage de phyto-œstrogènes dans les fourrages. Pour alléger l’optimisation de la préparation des échantillons, la méthodologie des surfaces de réponses a été utilisée. Un plan d’expérience de Box-Behnken a été appliqué aux étapes d’extraction et d’hydrolyse. Parmi les différents facteurs pris en compte, les impacts de la nature du solvant utilisé lors de l’extraction ainsi que la température et le pH lors de l’hydrolyse, ont clairement pu être mis en évidence. L’ensemble des données générées a également permis de définir des conditions optimales d’extraction et d’hydrolyse pour chacun des composés. Ces conditions n’étant pas identiques pour chacun d’entre eux, un compromis a été trouvé afin de pouvoir analyser l’ensemble de ces composés simultanément. L’ensemble de la méthode a ensuite été validée selon les recommandations de l’EMA/CVMP/VICH/463202/2009, pour confirmer sa fiabilité et robustesse. Cette dernière, combinée au model d’ensilage en sacs sous vide, a permis pour la première fois de suivre la cinétique d’évolution de 4 phyto-œstrogènes (daidzéine, génistéine, formononétine et biochanin A) durant une période d’ensilage. [less ▲]Detailed reference viewed: 49 (4 ULg) Direct Numerical Simulation of Mixed Convection in Turbulent Channel Flow: On the Reynolds number dependency of momentum and heat transfer under unstable stratificationSid, Samir ; Dubief, Yves; Terrapon, Vincent Conference (2015, May 27)Direct numerical simulations of unstably stratified turbulent channel flow have been performed in order to investigate the Reynolds number effect on mixed convection. Six different cases are considered ... [more ▼]Direct numerical simulations of unstably stratified turbulent channel flow have been performed in order to investigate the Reynolds number effect on mixed convection. Six different cases are considered with friction Reynolds number Re_\tau =180 and 395 and friction Richardson number Ri_\tau = 0, 100 and 1000. It is shown that both friction coefficient and Nusselt number increase under unstable stratification for a sufficiently large Richardson number. At low Richardson number, the friction coefficient can either increase or decrease depending on the Reynolds number. The drag reduction is associated with an increase of mean velocity due to an enhanced dissipation of Reynolds shear stress by pressure strain in the buffer region. The breakdown of the Reynolds analogy is demonstrated as the turbulent Prandtl number exhibits a non-constant behavior due to buoyancy. [less ▲]Detailed reference viewed: 53 (8 ULg) Control of nuclear sample polarization using optical pumping and radio-frequency methodsLenaers, Florence ; Glover, Rohan ; Bastin, Thierry Conference (2015, May 27)Laser-cooled and trapped radioactive isotopes are now being used to probe the properties of the weak interaction in nuclear beta decay. In this context, it is essential that one be able to control the ... [more ▼]Laser-cooled and trapped radioactive isotopes are now being used to probe the properties of the weak interaction in nuclear beta decay. In this context, it is essential that one be able to control the nuclear polarization of the atomic samples. We present two polarization/depolarization schemes for argon-35, whose mirror transition to chlorine-35 is a particularly sensitive candidate for precision measurements in nuclear beta decay. [less ▲]Detailed reference viewed: 29 (4 ULg) Dense-lineability in classes of ultradifferentiable functionsEsser, Céline Conference (2015, May 27)The Denjoy-Carleman classes are spaces of smooth functions which satisfy growth conditions on their derivatives defined through weight sequences. In this talk, given a Denjoy-Carleman class E of Beurling ... [more ▼]The Denjoy-Carleman classes are spaces of smooth functions which satisfy growth conditions on their derivatives defined through weight sequences. In this talk, given a Denjoy-Carleman class E of Beurling type that strictly contains another non-quasianalytic class F of Roumieu type, we handle the question of knowing how large the set of functions in E that are nowhere in the class $F$ is. In particular, we prove the dense-lineability of the set of functions of $E$ which are nowhere in F. Consequences for the Gevrey classes are also given. We extend then these results to the case of classes of ultradifferentiable functions defined imposing conditions on their Fourier Laplace transform using weight functions. [less ▲]Detailed reference viewed: 16 (3 ULg) Tel Quel, Change et Poétique en 1970 : "l'affaire de Lausanne"Lorent, Fanny Conference (2015, May 27)Detailed reference viewed: 12 (2 ULg) Outils logiques pour l’analyse des sensations. Théorie des ensembles et méréologieLeclercq, Bruno Conference (2015, May 26)Detailed reference viewed: 27 (0 ULg) Process-based method for groundwater resource vulnerability mapping with regards to solute contamination at the surfacePopescu, Cristina; Brouyère, Serge ; Orban, Philippe et alConference (2015, May 26)Numerous groundwater vulnerability methods have been developed taking into consideration a variable number of factors. The most common techniques are based on calculation of an index expressing the ... [more ▼]Numerous groundwater vulnerability methods have been developed taking into consideration a variable number of factors. The most common techniques are based on calculation of an index expressing the protective effect of underground formations overlying the groundwater resource. However, it has been shown that different overlay and index methods applied to the same system can yield dramatically dissimilar results (among others, Gogu et al., 2003). The limitation of most of these methods is related to their use of a qualitative definition of groundwater vulnerability, as opposed to a definition based on a quantitative description of contaminant migration. A process-based point of view is proposed and based on three factors describing a pollution event (Brouyère et al., 2001): (1) the transit time from the source to the target, (2) the duration of the contamination breakthrough at the target, (3) the ratio between the maximum concentration at the target to the released concentration at the contamination source. The assessment can then be based on the impulse response at the ‘target’ to a Dirac-type solicitation (point, unit mass, instantaneous source of pollution), considering only physical hydrodispersive processes for intrinsic vulnerability and both physical and biochemical processes for specific vulnerability. The breakthrough curve obtained after a vertical transfer through the overlying layers can be computed pixel by pixel. Automatically processing the columns with identical characteristics, 1D partially saturated flow and solute transport computations are performed. Different maps are obtained for the three above mentioned factors. On the basis of these results, different vulnerability maps can be built according to the weighting coefficients agreed by the local community or decision makers. This concept allows a clear distinction between conventional aspects and process-based results in the building of a final vulnerability indicator. This methodology has the further advantage to consider the possible impact of runoff conditions occurring at the land surface and possibly leading to lateral contamination of groundwater through downstream preferential infiltration features. To solve this problem, Popescu et al. (2004 & 2008) and Dassargues et al. (2009) proposed a method for quantifying a lateral “dangerosity” coefficient using runoff coefficients based on land use, slopes, and soil properties. A test application is illustrated on a case-study located in a limestone basin in Belgium. [less ▲]Detailed reference viewed: 23 (5 ULg) Venus nightglow intensity and solar activity: any correlation?Soret, Lauriane ; Gérard, Jean-Claude Conference (2015, May 26)We examine if any correlation is observed between the brightness of the O2 nightside airglow and the EUV solar irradiance using the full database of VIRTIS IR images. We conclude that, as was the case for ... [more ▼]We examine if any correlation is observed between the brightness of the O2 nightside airglow and the EUV solar irradiance using the full database of VIRTIS IR images. We conclude that, as was the case for the NO airglow observed during the Pioneer Venus mission, no response to solar activity is observed. [less ▲]Detailed reference viewed: 24 (1 ULg) Propagation of uncertainties in the modelling of MEMS resonators (using a 3-scale probabilistic approach)Lucas, Vincent ; Wu, Ling ; Golinval, Jean-Claude et alConference (2015, May 26)In order to ensure the accuracy of MEMS vibrometers, the first resonance frequency should be predicted at the design phase. However, this prediction is subjected to randomness: there is a scatter in the ... [more ▼]In order to ensure the accuracy of MEMS vibrometers, the first resonance frequency should be predicted at the design phase. However, this prediction is subjected to randomness: there is a scatter in the reached value resulting from the uncertainties involved in the manufacturing process. The purpose of this work is to take into account these uncertainties of the microstructure. The objective is a non-deterministic model that can be used since the design stage. The material is the source of uncertainties: the beam resonator is made of a polycrystalline material in which each grain has a random orientation. Solving the problem with a full direct numerical simulation combined to a Monte-Carlo method allows the probability density function of the resonance frequency to be computed. However this methodology is computationally expensive due to the number of degrees of freedom required to study one sample, motivating the development of a computationally efficient method. Towards this end a 3-scales stochastic model for predicting the resonance frequency of a micro-beam made of a polycrystalline linear anisotropic material is described. At the lower scale, we model the micro-structure with micro-volume elements. Due to the small-scale involved, the representativity of these micro-volume elements is not achieved and thus Statistical Volume Elements (SVE) are considered. These SVEs are generated under the form of a Voronoï tessellation, each grain being assigned a random orientation. Computational homogenization is applied over the SVEs, along with a Monte-Carlo procedure, to obtain a stochastic characterization of the elasticity tensor at the second scale of interest, the meso-scale. The spatial correlation between SVEs is also estimated. A generator based on spectral methods is implemented. Afterwards, using a stochastic finite element method, these meso-scale uncertainties are propagated by taking account of the spatial correlation up to the higher scale to predict the probabilistic behavior of the MEMS resonator. [less ▲]Detailed reference viewed: 21 (4 ULg) Sensitivity and vulnerability to groundwater overexploitation by a ‘pressure state impact’ and process based approachBeaujean, Jean; Lemieux, Jean-Michel; Therrien, René et alConference (2015, May 26)A methodology is developed for proposing a groundwater vulnerability assessment in a Pressure-State-Impact causal chain that is familiar to decision makers. The ‘Driver Pressure State Impact Response’ ... [more ▼]A methodology is developed for proposing a groundwater vulnerability assessment in a Pressure-State-Impact causal chain that is familiar to decision makers. The ‘Driver Pressure State Impact Response’ (DPSIR) framework, for describing interactions between society and the environment, defines a chain of Drivers that exert Pressures on the State of a given resource, such as groundwater, which then generates an Impact that will require an appropriate Response (Kristensen, 2004). The method is here based on the calculation of sensitivity coefficients for a user-defined groundwater state for which several physically-based indicators are proposed. These sensitivity coefficients reflect the easiness with which the groundwater state transmits pressures into impacts. They are grouped into a vulnerability matrix of pressures and impacts that quantify vulnerability for every combination of causal links identified in the DPSIR chain. For that reason, the sensitivity coefficients are converted to vulnerability, using the concept of ‘transgressing a given threshold’, which is commonly used in socioeconomic sciences (Luers et al. 2003). The concept of ‘rising above a given concentration threshold’ can be used for groundwater quality issues. The concept of ‘falling below a given piezometric head threshold’ can be used for groundwater quantity issues as aquifer overexploitation problems. Outside the careful selection of the sensitivity analysis method that can significantly influence the computational effort (Beaujean et al., 2013), emphasis is given to the illustration of the general methodology on a simple groundwater quantity case (of an alluvial aquifer with concerns related to water supply) demonstrating the potential use of this general and physically based vulnerability assessment method. While the methodology is general, the choice of causal chains has to be made prior to the calculation. The vulnerability is also related to a damaged state and is related to the ‘distance’ between the current state and a given threshold. This choice is arbitrary such that the vulnerability is sensitive to the choice of the threshold. [less ▲]Detailed reference viewed: 25 (0 ULg) De la spécification à la création de nouvelles catégorisations sociales: Le cas de francophones vivant en Flandre et de néerlandophones vivant en WallonieDassargues, Alix Conference (2015, May 26)Nos recherches doctorales visent à étudier la manière dont des individus en situation d’allophonie « illégitime » se catégorisent socialement. Puisqu’aucune catégorie identitaire légitime (c.-à-d ... [more ▼]Nos recherches doctorales visent à étudier la manière dont des individus en situation d’allophonie « illégitime » se catégorisent socialement. Puisqu’aucune catégorie identitaire légitime (c.-à-d. institutionnalisée par les dictionnaires, les médias, les politiciens ou autres instances légitimatrices (Bourdieu 1982)) ne rend compte de la situation de francophones vivant en Flandre (région belge unilingue néerlandophone) et de néerlandophones vivant en Wallonie (région belge unilingue francophone excepté une petite communauté germanophone institutionnellement reconnue et territorialisée), ces individus conceptualisent le champ social de façon originale afin qu’il corresponde à leurs propres expériences de vie (Harder 2010 : 18). En se basant sur des principes tels que la légitimité d’un lexème dans l’espace discursif ou encore le caractère idiolectal ou non d’une catégorisation, nous nous proposons d’observer les modes de conceptualisation de l’identité par des locuteurs particulièrement aptes à formuler des catégorisations originales du champ social puisque leurs expériences de vie ne font pas l’objet de catégorisations légitimes. À partir de transcriptions d’entretiens semi-directifs, nous avons examiné le discours de témoins afin d’analyser leurs conceptualisations du champ social à travers les catégorisations qu’ils emploient. Nous prenons en compte les catégories légitimes et illégitimes citées dans les témoignages selon leur institutionnalisation (présence ou non dans les dictionnaires et dans les discours médiatiques) et la manière dont elles sont considérées par les locuteurs (catégorie considérée comme légitime ou non par les locuteurs). De la sorte, une typologie de nouvelles catégorisations identitaires a pu être établie sur la base d’une analyse linguistique : spécification d’un lexème légitime par une proposition relative , spécification d’un signifié par un redoublement de certains signifiants légitimes , spécification d’un signifié par l’instauration d’une gradation dans l’adéquation avec une catégorie légitime (stéréotype institutionnalisé) , modifications de signifiés dans des catégorisations légitimes , création de nouvelles catégorisations à partir d’adjectifs et de lexèmes légitimes , création de métaphores en transposant l’expérience d’un domaine conceptuel des catégories sociales (cf. Lakoff & Johnson 1980). Cette recherche interdisciplinaire suggère que la construction de sens s’établit à partir d’autres connaissances déjà organisées entre elles (Harder 2010:113) et partagées par une communauté d’individus. En choisissant le thème ambitieux de l’identification (ou la catégorisation) de soi et des autres, cette recherche permet également de transposer les connaissances de la linguistique cognitive au domaine social. Ainsi, elle confirme notamment que le modèle sémantique basé sur un prototype (Rosch 1978; Lakoff 1987) est adéquat pour rendre compte de la construction individuelle du sens dans le champ social. [less ▲]Detailed reference viewed: 19 (1 ULg) A stochastic multiscale analysis for MEMS stiction failureHoang Truong, Vinh ; Wu, Ling ; Golinval, Jean-Claude et alConference (2015, May 26)Stiction is a major failure in microelectromechanical system (MEMS) devices in which two contacting surfaces can remain stuck together because of the adhesive forces, such as van der Waals forces and ... [more ▼]Stiction is a major failure in microelectromechanical system (MEMS) devices in which two contacting surfaces can remain stuck together because of the adhesive forces, such as van der Waals forces and capillary forces. Stiction is a multiscale problem which is characterized by three different lengths: the MEMS device characteristic length, the roughness of the contacting surfaces, and the distance range of the adhesive forces. Because MEMS surfaces roughness and adhesive force distances are of comparable scales, the randomness in the contacting surfaces can result in important uncertainties on the interacting forces, and in turn lead to a scatter in the MEMS structural behavior. The purpose of this work is to quantify the uncertainties on the macro stiction behavior of a MEMS structure due to the randomness in its contacting surfaces. A full analysis, such as the combination of a Monte-Carlo simulation to generate random surfaces combined with finite element (FE) analyses to model the stiction behavior, is expensive in terms of the computational cost due to the difference in the scales between the macro characteristic length and the distance range of the adhesive forces. Thus, in this work, we develop a stochastic multiscale analysis. At the micro scale, the uncertainties in the interacting forces between two rough surfaces are investigated. The power spectral density function of the surface is characterized from experimental topology measurements, and interacting surfaces are then generated as Gaussian random surfaces. For each generated random surface, the interacting adhesive forces are calculated by using a modified Dejarguin-Muller-Toporov (DMT) model. The resulting adhesive contact forces can be integrated using the finite element method at the structural scale by associating to each discretized contacting point a sampled surface. We then use the Monte-Carlo method to quantify the uncertainties in the stiction behavior of the MEMS device. [less ▲]Detailed reference viewed: 43 (16 ULg) About the Regularity of Cantor's BijectionSimons, Laurent ; Nicolay, Samuel Conference (2015, May 25)In 1878, Cantor proved that there exists a one-to-one correspondence between the points of the unit line segment [0,1] and the points of the unit square [0,1]². Since this application is defined via ... [more ▼]In 1878, Cantor proved that there exists a one-to-one correspondence between the points of the unit line segment [0,1] and the points of the unit square [0,1]². Since this application is defined via continued fractions, it is very hard to have any intuition about its smoothness. In this talk, we explore the regularity and the fractal nature of Cantor's bijection, using some notions concerning the metric theory and the ergodic theory of continued fractions. This talk is based on a joint work with S. Nicolay. [less ▲]Detailed reference viewed: 15 (0 ULg) Gestion des déchets nucléaires en France et en Belgique: Quelle place pour la critique ?Parotte, Céline Conference (2015, May 25)Depuis les années 1970, avec la multiplication des controverses scientifiques (Callon, Lascoumes et Barthe 2001), souvent liées à des mouvements pacifistes en environnementalistes ; nous assistons à la ... [more ▼]Depuis les années 1970, avec la multiplication des controverses scientifiques (Callon, Lascoumes et Barthe 2001), souvent liées à des mouvements pacifistes en environnementalistes ; nous assistons à la naissance d’un flux d’incertitude et de critique politico-sociale, dirigée principalement vers le monde scientifique, sa production et ses hésitations. Il est malaisé de prévoir si cela mènera à une réelle désolidarisation des notions de science, technologie et progrès, mais il reste à supposer que cette critique permettra une gestion plus réflexive des effets majeurs du développement scientifique et technologique (Schot et Rip 2009). En d’autres termes, bien que les liens entre les idéologies du progrès et de la technologie restent très souvent puissants et non remis en question, on assiste au même moment à une critique sociale des conséquences sur le processus de gestion des choix technologiques qui s’y rapportent. Cette contribution propose de s’attarder sur le cas de la gouvernance socio technique de la gestion des déchets hautement radioactifs depuis le « tournant participatif » opéré dans les années 90 en France et en Belgique. Il s’agit de poser un regard critique sur l’apparition d’un nouveau mode de gouvernance plus participatif (au travers de l’inclusion de nouveaux acteurs) et ses conséquences. Dans quelle mesure ceux-ci redéfinissent-ils les positionnements du monde scientifique au sein du processus décisionnel ? Comment le monde scientifique reçoit-il les critiques qui lui sont adressées ? Plutôt que des tendances globales, cette contestation témoigne le plus souvent d’une mosaïque d’activités critiques dynamiques, concurrentes ou complémentaires dont les effets semblent faire vaciller — ou à tout le moins mettre sous tension — l’organisation, les routines et les institutions des sociétés modernes (Delvenne 2011). Cette mosaïque reflète le dynamisme des acteurs sociaux qui propagent leurs agendas et défendent leurs intérêts à travers la négociation de concessions, l’enchevêtrement de décisions et la cristallisation de rapports de force. En d’autres termes, les avancées d’un projet comme la gestion des déchets nucléaires ne sont pas la progression inéluctable d’un processus uniformément accepté par toutes les tendances de la société. En réalité, il existe une multitude d’acteurs qui influencent sans cesse la nature de ses contours. Ces acteurs sociaux bénéficient d’espaces politiques et institutionnels divers pour exprimer leurs préférences et tenter de transformer durablement les critiques qu’ils formulent en actions politiques qui trouvent un écho plus large au sein de la société. [less ▲]Detailed reference viewed: 34 (4 ULg) Charles Juliet : Du portrait a-posteriori à l’écriture de soi L’adresse à la mère comme tentative de désenfouissement dans LambeauxVandormael, Thomas Conference (2015, May 25)Lambeaux propose un diptyque de portraits. Dans la première partie, celui de la mère biologique. Dans la seconde, celui de l’auteur lui-même et au sein de celui-ci, enfin, le portrait de la mère adoptive ... [more ▼]Lambeaux propose un diptyque de portraits. Dans la première partie, celui de la mère biologique. Dans la seconde, celui de l’auteur lui-même et au sein de celui-ci, enfin, le portrait de la mère adoptive. La dimension vocative explicite de la narration en constitue à la fois l’originalité et le paradoxe. Le recours au « Tu » dans l’ensemble du texte fait advenir une poétique de l’adresse en laquelle se cristallise la spécificité du récit de filiation propre à l’autofiction de la littérature contemporaine : différent du simple devoir de mémoire ou encore de la - très en vogue - commémoration, il se situe plutôt du côté de la restitution, à laquelle il y a deux sens à donner : à la fois reconstituer ce qui fut et s’est défait, et rendre leur existence à ceux qui s’en sont trouvés dépouillés en faisant apparaître ce qui demeure enfoui et dont on n’a pu hériter. Pour répondre au silence d’une mère qu’il n’a pas connue et qui elle-même n’a pas pu s’exprimer, faute d’accès au langage ou d’une présence pour l’écouter, Juliet choisit l’instantané et l’immédiateté d’un discours d’interpellation au présent et la forme du dialogue avec les morts, forcément toujours en partie déjà voué à l’échec. Dès lors, notre propos souhaite interroger comment le choix du vocatif permet un dédoublement fécond du sujet,faisant advenir une relation de soi à soi qui déjoue les processus classiques de l'autobiographie.﻿﻿ [less ▲]Detailed reference viewed: 46 (1 ULg) Electric current crowding in nanostructured conductorsSilhanek, Alejandro Conference (2015, May 24)When current stream lines are forced to depart from their rectilinear trajectory due to the presence of an obstacle, they conglomerate at the sharp bends encountered on their paths. The consequent current ... [more ▼]When current stream lines are forced to depart from their rectilinear trajectory due to the presence of an obstacle, they conglomerate at the sharp bends encountered on their paths. The consequent current crowding is present in normal metals as well as in superconductors and has been, since long ago, identified as a key player in electromigration phenomena leading to failure in integrated circuit interconnects while might also be at the origin of local ablation in planar plasmonic structures. More recently, current crowding has been recognized as an important factor limiting the performance of superconducting single-photon detectors, leading to flux quanta motion rectification, or being a source of unwanted ratchet signal and depletion of surface barriers for magnetic flux penetration. In this talk, we will also show that in nanostructured superconductors at low temperatures, current crowding can trigger abrupt flux avalanches developing well defined geometrical patterns. Our experimental findings are backed up to the finest details, by simulations based on a phenomenological thermomagnetic model which, in turn, can be used to predict such complex structures and, given its reliability, allows one to estimate physical variables of more difficult experimental access, such as the local values of temperature and electric field. [less ▲]Detailed reference viewed: 40 (8 ULg) La pneumoconiose des ouvriers mineurs : quelles connaissances pour quelles actions (c. 1860 – c. 1960)Geerkens, Eric Conference (2015, May 23)Detailed reference viewed: 18 (0 ULg) Immersie-onderwijs met het Nederlands als doeltaal: Onderzoek naar de attitudes en motivatie van de ouders van immersie- en niet-immersie-leerlingen uit Luikse secundaire scholende Le Vingne, Charlotte Conference (2015, May 23)Detailed reference viewed: 29 (3 ULg) Exploration de facteurs cognitifs et thymiques en lien avec les symptômes psychotiques : Analyses en clusters.Laloyaux, Julien ; Laroi, Frank ; Nuyens, Filip et alConference (2015, May 22)Introduction Il est maintenant reconnu qu’il existe différentes trajectoires possibles au développement et au maintien des symptômes psychotiques tels que les hallucinations et les idées délirantes. Ces ... [more ▼]Introduction Il est maintenant reconnu qu’il existe différentes trajectoires possibles au développement et au maintien des symptômes psychotiques tels que les hallucinations et les idées délirantes. Ces phénomènes sont également en lien avec différents mécanismes cognitifs (e.g. style d’encodage, impulsivité) et facteurs thymiques (e.g. anxiété, dépression). Cependant, le poids de ces facteurs peut certainement varier en fonction des différentes trajectoires. Objectifs L’objectif de cette étude est d’explorer l’impact de différents facteurs cognitifs et thymiques sur les symptômes psychotiques dans un large échantillon issu de la population normale afin d’essayer d’en faire ressortir des profils différents avec l’aide d’analyses en clusters. Les mesures suivantes ont été incluses : Launay-Slade Hallucinations Scale, Schizotypal Personality Questionnaire-Brief, Peters et al. Delusions Inventory, UPPS Impulsive Behavior Scale, Beck Depression Inventory, State-Trait Anxiety Inventory (trait). [less ▲]Detailed reference viewed: 29 (2 ULg) Assessing the consistency of ventilation in ocean biogeochemical models: oxygen solubility tracerMouchet, Anne Conference (2015, May 22)Detailed reference viewed: 17 (0 ULg) Make the ureter your friendBonnet, Pierre Conference (2015, May 22)Detailed reference viewed: 16 (1 ULg) Alain Robbe-Grillet face à l'entretien journalistique : paradoxesLorent, Fanny Conference (2015, May 22)Detailed reference viewed: 16 (3 ULg) Modulatory effects of Ruthenium (II)-based complexes on oxidative stress induced by activated HL60 cells and NeutrophilsMouithys-Mickalad, Ange ; Collienne, Simon ; Franck, Thierry et alConference (2015, May 22)There is a growing interest on the use of metal-based chemotherapeutic agents to fight different types of cancers [1]. The most used family of the organometallic compounds is platinum derivatives whose ... [more ▼]There is a growing interest on the use of metal-based chemotherapeutic agents to fight different types of cancers [1]. The most used family of the organometallic compounds is platinum derivatives whose Cisplatin (CisPt) is the lead compound used for the treatment of various cancers including lung, testis, gastric, breast, etc. Nevertheless, beside its recognized therapeutic effects, side effects such as gastric toxicity and acute kidney failure were observed during the treatment, limiting its clinical use. Other compounds are currently studied and among them, Ruthenium (Ru) complexes have gained more importance for their less toxicity and lower aggressive effect on healthy tissues than CisPt. Ru-complexes are also more resorbed and excreted [2]. Numerous studies focused on the mechanisms of action of Ruthenium compounds to fight cancer, including antioxidant or pro-oxidant activity. During inflammation, activation and infiltration of neutrophils contribute to oxidant stress playing a crucial role in tumor development. Likewise, the degranulation of neutrophil causes the release of myeloperoxidase (MPO) which reacts with H2O2 to catalyze redox reactions. A therapeutic target to control inflammation is the modulation of oxidant enzymes and cells involved in radical species production and redox reactions. Because Ruthenium compounds can easily enter into cancer cells, a series of Ru(II)-complexes newly synthesized were used for this purpose. They were first tested for their radical scavenging activities using ABTS and 1,1-diphenyl-2-picrylhydrazyl (DPPH) assays. Amongst them, compound 1 (LD0436) and compound 2 (LD04037) were then studied for their ability to modulate the reactive oxygen species (ROS) production by inflammatory cells like human promyelocytic leukemia cell line (HL 60) and neutrophils (PMN) using fluorescence, chemiluminescence (CL) and electron spin resonance ESR techniques. The toxicity of those Ru-complexes against HL-60 and neutrophils was checked using Trypan blue exclusion assay. Altogether, CL and ESR findings indicate that both complexes 1 (LD0436) and 2 (LD0437) exhibit a dose-dependent inhibitory activity compared to CisPt, gallic acid, curcumin and quercetin, which were taken as reference molecules in the different systems investigated. Similarly, the tested complexes also display an antioxidant profile on the substrate oxidation catalyzed by peroxidase such as MPO mainly involved in acute and chronic inflammatory situations. 1: (RuCl(p-Cymen)(S2C.IDip)]+(PF6)-], 2: (RuCl(p-Cymen)(S2C.Icy)]+(PF6)-] References: 1. Ceresa C, Brawin A, Cavaletti G, Trinidad A et al., (2014) Current Medicinal Chemistry 20(21), 2237-2265. 2. Liu, Y, Zhang X, Zhang R, et al., (2011) European Journal of Inorganic Chemistry. 1974-1980. [less ▲]Detailed reference viewed: 51 (9 ULg) Participation à la journée d'études "Intervenants et interventions médico-psycho-sociaux dans le système de justice pénale"Cormann, Grégory Conference (2015, May 22)Detailed reference viewed: 23 (6 ULg) Quels profils caractérisés par l'humeur, l'activation comportementale et les stratégies de régulation émotionnelle pouvons-nous identifier dans une population adulte ?Wagener, Aurélie Conference (2015, May 22)The behavioural model of depression put forward that the level of activities in depressed patients decreases which maintains their low mood. Depressed patients are also known to use non-adaptive cognitive ... [more ▼]The behavioural model of depression put forward that the level of activities in depressed patients decreases which maintains their low mood. Depressed patients are also known to use non-adaptive cognitive coping strategies (e.g. rumination, catastrophizing). Previous research underlined that cognitive coping strategies predict the level of activation (non-adaptive cognitive coping strategies predict a low level of activation). According to the dimensional approach of psychopathology, we hypothesised that sub-groups of depressed and non-depressed adults could be identified depending on their level of activation and the kind of cognitive coping strategies they use. In order to test this hypothesis, we investigated the relationships between the level of activation, the cognitive coping strategies, anxiety and depression with a cluster-analysis approach. 762 adults (530 women, 232 men; mean age= 31.54, SD= 12.08) completed an online survey assessing the above-mentioned variables with self-reports measures (BADS-SF, CERQ, BDI-II, STAI-Y B). Results identified four clusters that differed according to the level of activation, the cognitive coping strategies, the anxiety and the depression. For instance, one of the four classes highlighted that non-active depressed adults used catastrophizing and rumination contrary to another classes of active non-depressed ones. These results, providing interesting guidelines for psychological interventions, will be discussed further during the congress. [less ▲]Detailed reference viewed: 55 (6 ULg) Thématique 3 - Logement et aménagement du territoire (Président de séance et animateur)Ozer, Pierre Conference (2015, May 22)Detailed reference viewed: 3 (0 ULg) Effect of inulin and wheat bran in the creep feed of neonatal pigletsLi, Bing ; Leblois, Julie ; Bindelle, Jérôme et alConference (2015, May 22)Detailed reference viewed: 39 (10 ULg) Assessing employees propensity to engage in OCB: incremental validity of SJT beyond personality.Lothe, Benoit ; Hansez, Isabelle ; Scius, Anthony et alConference (2015, May 21)This study presents the validation results of a SJT developed in collaboration with a Belgian french speaking mutual insurance company for the assessment of employees OCB. The purpose is to provide ... [more ▼]This study presents the validation results of a SJT developed in collaboration with a Belgian french speaking mutual insurance company for the assessment of employees OCB. The purpose is to provide empirical evidence concerning the validity of using the SJT by examining the issues of OCB criterion validity, incremental validity beyond a personality inventory, applicant perception and SJT transparency level. The SJT was developed in-house and following relevant literature recommendations (Weekley, Ployhart & Holtz, 2006). Data were collected on 117 white-collar employees. Three other measurements were concurrently collected: OCB using Williams & Anderson (1991) self-reported scales, personality using the Gosling, Rentfrow & Swann (2003) ten item inventory (TIPI) and applicant perception using SPJS (Bauer, & al., 2001). An open-ended question was used to access the extent to which applicants are able to identify the SJT criteria. Results indicated that the SJT is a relevant predictor of OCB (r = .42; p<.001). The SJT also provides incremental explanation of the OCB criteria beyond the personality inventory (∆R² = .11; p<.001). There was in average an agreement about the acceptability of the SJT in terms of perceived procedural justice. No relationships were found between applicant ability to correctly identify the SJT criteria and SJT score or OCB self-rating. This study is to our knowledge among the first attempt to develop and validate a tool to fill the gap on how to predict employees OCB (Organ, Podsakoff & Podsakoff, 2010). Implications for the personnel selection and current limitations will be discussed. [less ▲]Detailed reference viewed: 45 (0 ULg) Comment faire circuler les semences ? Enjeux et perspectives pour les alternativesHecquet, Corentin Conference (2015, May 21)Detailed reference viewed: 44 (9 ULg) De Wittgenstein à Debuyst, en passant par Deleuze : à propos de « La criminologie clinique, un passage par Wittgenstein »Englebert, Jérôme Conference (2015, May 21)Detailed reference viewed: 36 (7 ULg) Investigation of the consistency of the recent CH4 increase derived from NDACC-FTIR, ACE-FTS and GEOS-ChemBader, Whitney ; Conway, Stephanie; Strong, Kim et alConference (2015, May 21)We present an update on the status of the recent methane increase study based on six FTIR ground-based sites, ACE-FTS satellite occultations and GEOS-Chem simulation.Detailed reference viewed: 48 (7 ULg) Impact des matières organiques sur la dynamique des éléments traces métalliques dans les systèmes sol-planteLiénard, Amandine ; Colinet, Gilles Conference (2015, May 21)Detailed reference viewed: 36 (6 ULg) Erasmus : Eloge de la raison ou de la folie. Quel enseignement des langues pour quelle Europe ?Defays, Jean-Marc Conference (2015, May 21)Detailed reference viewed: 16 (0 ULg) Transmettre un patrimoine et/ou sauvegarder l’Empire ? Retour sur les projets de partage du pouvoir de Charlemagne (806-813)Close, Florence Conference (2015, May 21)Detailed reference viewed: 14 (0 ULg) The neural bases of proactive and reactive control processes in normal agingCollette, Fabienne Conference (2015, May 21)Detailed reference viewed: 18 (0 ULg) Thématique 6 - Le rôle des pouvoirs publics dans la transition (Président de séance)Ozer, Pierre Conference (2015, May 21)Detailed reference viewed: 1 (0 ULg) Visualisation of glutamate neurotransmission with PET-probes targeting AMPA subtype receptorsDeverdenne, François Conference (2015, May 21)Detailed reference viewed: 18 (4 ULg) La parodie dramatique : un miroir déformant de l'identité auctoriale? Le cas de "Tancrède jugée par ses soeurs" (1760)Daubercies, Laurence Conference (2015, May 21)Detailed reference viewed: 21 (1 ULg) Anatomy of the pelvis re-designedBonnet, Pierre Conference (2015, May 21)Detailed reference viewed: 24 (0 ULg) Changes of macrofauna stable isotope compositions in a very inconstant seagrass detritic habitat: actual diet modification or baseline shift?Remy, François ; Mascart, Thibaud ; Dauby, Patrick et alConference (2015, May 20)Decayed leaves of the Neptune grass Posidonia oceanica, detached and then exported during storms, constitute an important compartment in terms of organic matter transfer from the seagrass bed to the other ... [more ▼]Decayed leaves of the Neptune grass Posidonia oceanica, detached and then exported during storms, constitute an important compartment in terms of organic matter transfer from the seagrass bed to the other habitats, particularly coastal habitats. These exported litter accumulations (ELA) support a diverse (more than 130 species) and abundant (up to 4900 id.m-2) vagile macrofauna (invertebrates > 500µm) assemblage which may play a key role in the degradation, enrichment and carbon transfer from P. oceanica dead material to coastal food chains. Indeed, preliminary results of vagile invertebrates gut content observations show that even if only a few of these species ingest a large proportion of P.oceanica dead leaves fragments, most of the others ingest a small but non-negligible part, suggesting a potential role of the whole community in the mechanical fragmentation of the dead leaves. ELA are very dynamic habitats with highly variable food availability, quality, and composition. Such an inconstant habitat may result in drastic modifications of the invertebrate community but also of its trophic structure and ecology. To test this hypothesis of influence of pulsed availability, quality and composition of food sources on the vagile macrofauna diet, we took seasonal samples in Calvi Bay (Corsica, 8°45’E; 42°35’N), at two sites between August 2011 and May 2012. Stable isotopes analysis (C&N) were conducted at an individual level on dominant macrofauna species and mixing and isotopic niche model packages in R were used. Bayesian inference “SIBER” package highlighted significant seasonal and spatial differences of diet at the community, specific and even intraspecific level. Data confirm the potential transfer of seagrass material to animal tissues but in various proportions depending of the species and the season. But one question remained: are these variations reflection a true diet change, or only a spatiotemporal baseline variation of the food sources isotopic composition? “SIAR” Bayesian mixing model showed that it depends on the species and that the two responses co-occur. We emphasized the need to work at the specific level but also with an adequate temporal resolution for sampling to encompass diet and baseline variability. [less ▲]Detailed reference viewed: 61 (5 ULg) Simulations numériques sur des solides plongés, dans un contexte X-FEMDuboeuf, Frédéric ; Béchet, Eric Conference (2015, May 20)Ce travail traite des différents enjeux pour conserver toutes les capacités des calculs par éléments finis, en s’affranchissant des maillages conformes à la géométrie. La représentation de la géométrie ... [more ▼]Ce travail traite des différents enjeux pour conserver toutes les capacités des calculs par éléments finis, en s’affranchissant des maillages conformes à la géométrie. La représentation de la géométrie, la construction d’un espace fonctionnel adapté et l’imposition des conditions aux limites sont abordées dans le contexte de la méthode des éléments finis étendus, tout particulièrement en présence de solides plongés dans un espace de dimension supérieure. L’approche proposée permet de traiter tout type de plongement, c.-à-d. des problèmes 1, 2, et/ou 3D plongés dans des maillages 2 ou 3D. [less ▲]Detailed reference viewed: 52 (18 ULg) Critical analysis and alternative treatment of Type Ia Supernovae dataHauret, Clémentine Conference (2015, May 20)Detailed reference viewed: 18 (7 ULg) Quelles stratégies africaines face aux émergents?Mputu Ingole, Jean-Claude Conference (2015, May 20)Le rapprochement entre l’Afrique et les pays émergents pose toute une série des questions. Dans cet article, nous voulons nous interroger sur la position africaine face à ces nouveaux acteurs. Le ... [more ▼]Le rapprochement entre l’Afrique et les pays émergents pose toute une série des questions. Dans cet article, nous voulons nous interroger sur la position africaine face à ces nouveaux acteurs. Le continent africain est-il un acteur conscient des enjeux en cours avec ces nouveaux « partenaires », pour reprendre les termes de l’Union Africaine, ou comme le suggère certains auteurs, elle serait entrain de subir une fois de plus la volonté des acteurs extérieurs ? Car si l’on constate que l’ensemble des pays émergents ont mis en place des nouvelles stratégies africaines, le contraire ne paraît pas évident. Ce papier se propose donc de voir s’il existe une ou plusieurs stratégies africaines vis-à-vis des émergents et si oui, de les analyser dans le contexte d’un monde en pleine mutation avec des nouveaux enjeux. Comment l’Union Africaine fait face aux nouvelles sollicitations des Etats émergents ? Compte-t-elle en tirer profit pour sa propre affirmation comme une actrice qui compte ou bien est-elle marginalisée par les Etats africains qui chacun, en ce qui le concerne, recherche ses propres intérêts. A-t-elle mis en place des nouveaux instruments pour gérer, selon ses intérêts cet accroissement de coopération avec les pays émergents. Quels rôles jouent les organisations régionales et/ou le NEPAD dans le développement de ces nouvelles coopérations ? Car au moment où la croissance africaine est l’une des plus fortes au monde et que le nombre de ses partenaires ne cesse d’augmenter, il est dès lors question de savoir comment l’Afrique se prépare à saisir ces nouvelles opportunités pour renforcer sa présence sur le monde avec ou sans les émergents. [less ▲]Detailed reference viewed: 24 (4 ULg) Nature-based agricultural practices for healthier food and environment - The example of agroforestry and wildflower stripsArtru, Sidonie ; Hatt, Séverin ; Boeraeve, Fanny et alConference (2015, May 20)Detailed reference viewed: 43 (4 ULg) La coopération Sud-Sud au sein des BRICS ; un nouveau paradigme d’aide au développement? Le cas du Brésil en MozambiqueCusson, Gabrielle Conference (2015, May 20)L’émergence et l’affirmation de nouvelles puissances dites du « Sud », dont celles des BRICS, ont donné un nouveau souffle à la coopération Sud-Sud (CSS), et ce spécialement en Afrique. Ces émergents ... [more ▼]L’émergence et l’affirmation de nouvelles puissances dites du « Sud », dont celles des BRICS, ont donné un nouveau souffle à la coopération Sud-Sud (CSS), et ce spécialement en Afrique. Ces émergents jouissent d’une marge de manœuvre politique et économique grandissante qui leur permet de multiplier les partenariats Sud-Sud, de contribuer financièrement à la coopération au développement et d’instaurer de nouvelles structures d’institutionnalisation de CSS. La stratégie de CSS des BRICS se veut différente du modèle traditionnel de coopération Nord-Sud (CNS) ; elle s’appuie sur des principes de solidarité, offre une aide sans condition, se base sur des relations horizontales permettant des bénéfices mutuels pour les partenaires. Cependant, la CSS engagée par les BRICS n’est pas exempte de retombées politiques, diplomatiques ou commerciales à leur égard. Dans ce contexte, il est valable de se questionner à savoir si une politique de coopération au développement déployée par une puissance émergente peut être désintéressée et s’il est possible d’établir des relations d’égal à égal alors qu’elle se développe dans un cadre de rapports entre un donateur et un récepteur ? Cette présentation tentera de déterminer si le modèle de CSS soutenu par les BRICS s’inscrit dans un nouveau paradigme pour repenser l’efficacité de l’aide au développement en Afrique ou s’il reproduit la structure d’aide traditionnelle du modèle de CNS. Pour ce faire, nous étudierons le cas de la pénétration brésilienne au Mozambique, soit son implication technique et financière au développement de l’exploitation de certaines cultures à des fins de production de biocarburants. [less ▲]Detailed reference viewed: 42 (5 ULg) L’influence normative de la Chine en Amérique latine, un défi stratégique pour l’Union européenne ?Wintgens, Sophie ; Dabène, OlivierConference (2015, May 20)La Chine est aujourd’hui devenue un partenaire commercial incontournable, un important pourvoyeur d’investissements directs étrangers et un grand fournisseur de prêts financiers pour un nombre croissant ... [more ▼]La Chine est aujourd’hui devenue un partenaire commercial incontournable, un important pourvoyeur d’investissements directs étrangers et un grand fournisseur de prêts financiers pour un nombre croissant de pays d’Amérique latine. L’accroissement de ses échanges économiques et commerciaux avec ce sous-continent va de pair avec l’imposition des normes économiques et politiques dont sa politique commerciale internationale est porteuse. Cet article pose dès lors la question du défi que représente cette influence normative chinoise pour la stratégie déployée par l’Union européenne envers l’Amérique latine. [less ▲]Detailed reference viewed: 25 (5 ULg) L'organisation spatiale des pôles de compétitivité en Wallonie. Vers une nouvelle géographie économique du territoire wallon ?Wilmotte, Pierre-François ; Halleux, Jean-Marie Conference (2015, May 20)The objective was to introduce the Walloon clusters thanks to the concepts of proximity, agglomeration economies, the local buzz and the global pipelines. The presentation show that the role of ... [more ▼]The objective was to introduce the Walloon clusters thanks to the concepts of proximity, agglomeration economies, the local buzz and the global pipelines. The presentation show that the role of agglomeration economies and proximity are variable according to the clusters. That causes a new economic geography for the economic base of Wallonia. [less ▲]Detailed reference viewed: 34 (7 ULg) Les circuits-courts en alimentation comme réponse au défi climatiqueOzer, Pierre Conference (2015, May 20)Detailed reference viewed: 52 (5 ULg) Structural properties of densified GexSe1-x glassesYildirim, Can ; Micoulaut, Matthieu; Raty, Jean-Yves Conference (2015, May 20)The evolution in structural properties of liquid and densified glassy GexSe1-x is investigated by use of First Principles Molecular Dynamics (FPMD) combined with X-ray absorption (XAS) experiments for the ... [more ▼]The evolution in structural properties of liquid and densified glassy GexSe1-x is investigated by use of First Principles Molecular Dynamics (FPMD) combined with X-ray absorption (XAS) experiments for the glassy state. Four different compositions (x=10%, 16%, 18% and 33%) representing the flexible and stressed rigid sides of the reversibility window are the focus of the study. The target systems were studied at pressures up to ~ 11 GPa under both annealed and cold compression conditions. We examine the structure factors, pair distribution functions, bond angle distributions, coordination numbers and neighbor distributions. The results show that the real and reciprocal space properties are in very good agreement with the experimental findings. The structural evolution during densification reveals the edge sharing tetrahedra is maintained upon compression whereas Ge-Ge homopolar bonds tend to increase in number. Ge-Se-Ge bond angular distributions show a transformation from tetrahedral octahedral geometry. We discuss the effect of thermal history on structural properties during densification. [less ▲]Detailed reference viewed: 17 (2 ULg) Ressources minières en RDC, quelle(s) politique(s) des BRICS? Le cas des stratégies face aux minerais de conflit.Weerts, Audrey Conference (2015, May 20)Detailed reference viewed: 41 (11 ULg) Tuta absoluta (Lepidoptera: Gelechiidae) development on wild and cultivated plant speciesBawin, Thomas ; Dujeu, David ; Fagan, Maud et alConference (2015, May 19)The tomato leafminer, Tuta absoluta (Lepidoptera: Gelechiidae), is a widespread invasive species damaging economically important cultivated solanaceous crop plants, including tomatoes and potatoes. Little ... [more ▼]The tomato leafminer, Tuta absoluta (Lepidoptera: Gelechiidae), is a widespread invasive species damaging economically important cultivated solanaceous crop plants, including tomatoes and potatoes. Little is known about the ability of this microlepidoptera to encounter and develop on alternative wild and agricultural plant species. These plants could provide refuges and have to be identified for more efficient integrated management strategies. In the present study, we assessed under laboratory conditions the ability of T. absoluta to develop on such plant species referred as potential hosts in the literature, including Solanaceae, Chenopodiaceae, Convolvulaceae, Fabaceae, and Malvaceae. For each plant species, fitness tests were performed in Petri dishes by isolating single individuals with excised leaf. We found that Solanum species allowed higher larval survivability and shorter development time (from egg to adult emergency) compared to the other plants. Non-solanaceous plants were not able to sustain T. absoluta larvae. Two choice behavioral assays performed in flying tunnels revealed that adult distribution and female oviposition did not differ between Solanum species, which were preferred to other tested solanaceous plants. These results appeared to be consistent with survival rates and development times. Because larval survivability depends on the female’s oviposition choice, the hypothesis that host plant choice is influenced by plant volatile organic compounds has to be tested. Volatile organic compounds released by solanaceous plants were trapped using a dynamic collection system, and analyzed by GC-MS. Solanum volatile profiles showed similarities, and were presenting quantitative and qualitative differences with the other tested solanaceous plants, providing some explanations in the observed behavioral discrimination. Further electrophysiological and behavioral assays are required to confirm the effect of specific chemicals on the choice of the oviposition site in T. absoluta. It can be concluded that Solanum species are the more suitable hosts for T. absoluta development. Other solanaceous plant species could be opportunistically colonized with little incidence but care should be taken in these results as genetic variability in insects and plants, as well as plant physiological state, might have an impact on the pest survivability. [less ▲]Detailed reference viewed: 71 (8 ULg) Efficiency of pheromone-based formulations against phytophagous pestsFassotte, Bérénice ; Vandereycken, Axel ; Chevalier Mendes Lopes, Thomas et alConference (2015, May 19)Innovative integrated pest management methods are needed to overcome market withdrawal of synthetic pesticides. Therefore, the identification of environment-friendly bio-products carrying direct or ... [more ▼]Innovative integrated pest management methods are needed to overcome market withdrawal of synthetic pesticides. Therefore, the identification of environment-friendly bio-products carrying direct or indirect biocide activity is one promising alternative option. Our researches focus on the identification of appropriate formulations releasing volatile organic compounds that are attractant for natural enemies of insect pests. However, the elaboration of slow-release devices that ensure stable and controlled release of active volatile compounds is quite challenging. Here, we developed a formulation based on E-β-farnesene and (-)-β-caryophyllene, these two semiochemicals having strong attractive potential on aphid natural enemies including lady beetles and hoverflies. Both compounds were encapsulated together in alginate gel beads. The blend efficiency was first evaluated through laboratory assays, and then in wheat and broad bean fields, by considering the abundance and diversity of aphids and their natural enemies. [less ▲]Detailed reference viewed: 58 (10 ULg) Approche contingente du design du système d’information comptable dans les PMI tunisiennesGhorbel, Jihene Conference (2015, May 19)Malgré les recherches qui sont de plus en plus nombreuses sur le système d’information comptable dans les PME, les résultats trouvés sont mitigés et contradictoires. Ainsi, nous essayons à travers ce ... [more ▼]Malgré les recherches qui sont de plus en plus nombreuses sur le système d’information comptable dans les PME, les résultats trouvés sont mitigés et contradictoires. Ainsi, nous essayons à travers ce travail de contribuer au débat relatif du design du système d’information comptable dans les PMI des pays en voie de développement comme la Tunisie. Dans une optique comptable et face aux défis auxquels se trouvent confrontées les entreprises et pour légitimer leur compétitivité et leur crédibilité, nous nous intéressons à une série de facteurs structurels et comportementaux susceptibles de mieux cerner le design du système d’information comptable. En recourant aux méthodes des équations structurelles, cette recherche révèle que le design du système d’information comptable auprès de 221 PMI est influencé par plusieurs facteurs contextuels. [less ▲]Detailed reference viewed: 38 (6 ULg) Screening for interesting elicitors to protect wheat against Zymoseptoria triticiLe Mire, Géraldine ; Siah, Ali; Fauconnier, Marie-Laure et alConference (2015, May 19)Plants face an array of biotic and abiotic stresses in their environment, making it necessary to use various chemical inputs to maintain satisfactory yield. Today, conventional agriculture is evolving ... [more ▼]Plants face an array of biotic and abiotic stresses in their environment, making it necessary to use various chemical inputs to maintain satisfactory yield. Today, conventional agriculture is evolving towards more sustainable practices, out of respect for human health and the environment. Elicitors are considered as promising biological control tools and draw major interest in IPM strategies. These plant-immunity triggering compounds, also called “stimulators of plant natural defenses”, induce a general and systemic resistance in the plant to various diseases. Although numerous elicitors have already been identified and some of them reached the market since the late 1970s, further investigations are still required to better understand the mode of action of these molecules in the plant and ensure a consistent efficiency under various field conditions. Few elicitors have yet been successfully tested and formulated to protect crop plants such as wheat, which is cultivated over large areas in Europe. This study focuses on the screening of ten potential elicitor products of various origins and structures to protect winter wheat against the fungal pathogen Zymoseptoria tritici. Greenhouse trials were carried out to measure the ability of the different products to reduce disease foliar symptoms (necrosis, chlorosis and pycnidia). In addition, the phytotoxicity and biocide activities of these products were evaluated under greenhouse and laboratory conditions, respectively. The corresponding results will be presented and discussed with the perspective to choose the best elicitor candidates and to undertake investigations on the signaling pathway and the influence of environmental parameters on the elicitation capacity. [less ▲]Detailed reference viewed: 71 (24 ULg) L'alliance impie à travers l'épistolaire du roi de FranceMarchandisse, Alain Conference (2015, May 19)Detailed reference viewed: 22 (2 ULg) From the Hubble Space Telescope to Juno, unraveling the secrets of Jupiter's UV auroraeBonfond, Bertrand Conference (2015, May 19)The successive generations of instruments on board the Hubble Space Telescope (HST) have revealed an increasing amount of details concerning the aurorae of Jupiter. Among the most striking results is the ... [more ▼]The successive generations of instruments on board the Hubble Space Telescope (HST) have revealed an increasing amount of details concerning the aurorae of Jupiter. Among the most striking results is the finding that these aurorae are actually made of a multitude of components arising from a variety of processes, ranging from the local interaction of the Jovian moons with the magnetospheric plasma to solar-wind induced compression of the whole magnetosphere. In this presentation, I will review a few recent results obtained from Hubble Space Telescope observations. First, I will show how the morphology and the dynamics of the Ganymede footprint, i.e. the aurora on Jupiter created by the electromagnetic interaction between Ganymede and Jupiter, allowed us to infer the processes at play. Then, I will present results on the vertical profile of the auroral emissions and what they tell us about the acceleration of the electrons causing the auroral emissions. Furthermore, I will describe some of the short-timescale dynamics of the polar-most emissions, including their quasi-periodic nature. Finally, I will conclude with a short description of the expected outcome of the Juno mission, which will provide its first scientific results in fall 2016. [less ▲]Detailed reference viewed: 57 (0 ULg) Spray retention variaility by barleyBoukhalfa, Hassina dite Hafida ; Lebeau, Frédéric Conference (2015, May 19)The effectiveness of a phytosanitary treatment depends on the amount of product actually retained by the plant leaves relative to the volume per hectare applied. Parameters affecting spray retention ... [more ▼]The effectiveness of a phytosanitary treatment depends on the amount of product actually retained by the plant leaves relative to the volume per hectare applied. Parameters affecting spray retention include application variables such as nozzle type, operating pressure and formulation, and target properties such as species and growth stage. These variables condition more specific parameters such as the number of droplet impacts by unit area of leaf, the droplet size and velocity distributions at impact, droplet physicochemical properties (dynamic surface tension and viscosity) for the application variables and leaf wettability and plant architecture for the target. During a uniform treatment of the crop, each plant receives various droplet distributions that behave differently during impact depending on its architecture. In consequence, this contributes to increase the varying retentions observed between plants in field trials, leading in practice to apply an amount of product always greater than required to provide the level of crop protection needed for insuring high yields. The aim of this paper is to observe the retention variability that can occur during a treatment depending on the equipment, tank mix formulation and crop properties. The spray retention variability was assessed for three tank mix formulations: tap water, tap water with break thru, and tap water with Li700. For each formulation ten sprays were realized on five barley plants at the two leaves growth stage (BBCH stage 12) grown indoor in controlled conditions and ten sprays realized on individual barley plants at the same growth stage. The amount of spray actually retained by barley plants was assessed by dosing a fluorescent tracer added to the mixtures. Barley plants were placed linearly below the center of a moving nozzle at the speed of 2m/s using a pressure of 2 bars. The last step was measuring leaf area for each spray and calculating the amount of sprays retained by barley plants to determine the variability of spray retention. [less ▲]Detailed reference viewed: 17 (8 ULg) Figer la mémoire, narrer le souvenir. De quelques documentaires photographiques.Hamers, Jérémy Conference (2015, May 19)Detailed reference viewed: 22 (1 ULg) Observational signatures of past mass-exchange episodes in massive binaries : The case of HD149404Raucq, Françoise ; Rauw, Grégor ; Gosset, Eric et alConference (2015, May 19)Detailed reference viewed: 17 (1 ULg) Xérogels de carbone en tant qu’anode de batteries Li-ion: Vers une relation texture - performances électrochimiquesPiedboeuf, Marie-Laure ; Léonard, Alexandre ; Deschamps, Fabien et alConference (2015, May 18)Detailed reference viewed: 19 (2 ULg) Présentation de cas pratique - atelier n°2 « Outils et méthodes de formation : quels outils (EAD, MOOC, partage social, manuels...) et quelles méthodes (enseignement mixte, classe inversée, résolution de problèmes, travaux en groupe...) face à des groupes de tailles très variables ? Comment former avec peu de moyens (financiers, humains, matériels) ? »Pasquet, Coralie Conference (2015, May 18)Au cours du premier quadrimestre de l’année académique 2014 - 2015, une nouvelle activité a été proposée aux 280 étudiants inscrits en 3ième année du grade de Bachelier en Médecine à ... [more ▼]Au cours du premier quadrimestre de l’année académique 2014 - 2015, une nouvelle activité a été proposée aux 280 étudiants inscrits en 3ième année du grade de Bachelier en Médecine à l’Université de Liège, ce dans le cadre du « Module Système Nerveux ». La réalisation progressive de cette activité s'est effectuée exclusivement en ligne. [less ▲]Detailed reference viewed: 114 (6 ULg) Démocratie et populisme: quelle réalité pour quelle légitimité?Biard, Benjamin; Debras, François Conference (2015, May 18)Detailed reference viewed: 27 (12 ULg) Design of new multifunctional nanocarriers for protein deliveryParilti, Rahmet ; Jérôme, Christine ; Howdle, Steven M. et alConference (2015, May 18)Polymeric nanoparticles have been extensively investigated for their biomedical applications especially as drug carriers. However, efficient encapsulation and delivery of therapeutic proteins in targeted ... [more ▼]Polymeric nanoparticles have been extensively investigated for their biomedical applications especially as drug carriers. However, efficient encapsulation and delivery of therapeutic proteins in targeted manner still present challenges. This project aims to develop a novel one-pot strategy to obtain nanoparticles able to carry proteins in their core, as well as bearing targeting and/or imaging agents on their surface. In addition to this objective, polymerizations are carried out in supercritical carbon dioxide (scCO2), which confers environmentally benign features to the process. Dispersion polymerizations of hydrophilic monomer 2-hydroxyethyl methacrylate (HEMA) in are carried out in scCO2 in the presence of an initiator, cross-linker and CO2-philic photoclevable stabilizer. Upon exposure to UV light, the o-nitrobenzyl junctions present at the surface of the particles are cleaved, thus providing water dispersible hydrogels. Spherical monodisperse nanoparticles were successfully synthesized in scCO2 with two different conditions. Milder reaction conditions were achieved by using 2,2'-Azobis(4-methoxy-2,4-dimethyl valeronitrile (V70) as an initiator which opens up the platform for one-pot protein encapsulation in scCO2. [less ▲]Detailed reference viewed: 61 (5 ULg) A tool for the precision synthesis of poly(ionic liquid)s in waterCordella, Daniela ; Kermagoret, Anthony; Debuigne, Antoine et alConference (2015, May 18)In recent years, poly(ionic liquid)s (PIL)s were found to take an enabling role in important fields of polymer chemistry and material science. PILs combine the unique properties of ionic liquids with the ... [more ▼]In recent years, poly(ionic liquid)s (PIL)s were found to take an enabling role in important fields of polymer chemistry and material science. PILs combine the unique properties of ionic liquids with the flexibility and properties of macromolecular architectures giving rise to a new family of functional polymers that opens new area of applications such as polymer electrolytes in electrochemical devices, powerful dispersants and stabilizers, absorbing membranes, precursors for carbon materials, porous polymers, etc. In this communication, we will report on the implementation of organometallic-mediated radical polymerization (OMRP) technique for the precision synthesis of unprecedented PILs (co)polymers. We will discuss how an organocobalt complex can efficiently control the growth of vinyl imidazolium chains and lead to PILs with predicted molar masses and low polydispersities under mild experimental conditions, which provide low temperatures (compared to the conventional radical polymerization techniques) and also the use of water as green polymerization medium. The huge potential of this system will be also highlighted by describing the one-pot synthesis of vinyl imidazolium-based block copolymers in heterogeneous conditions. This OMRP is unique for providing well-defined vinyl imidazolium based-copolymers opening for advanced PILs applications. [less ▲]Detailed reference viewed: 46 (4 ULg) Aging mechanisms in amorphous GeTeRaty, Jean-Yves ; Zhang, Wei; Luckas, Jennifer et alConference (2015, May 18)Aging phenomena are common to all amorphous structures, but of special importance in phase change materials (PCM) since it impedes the realization of multi-level memories. Different interpretations have ... [more ▼]Aging phenomena are common to all amorphous structures, but of special importance in phase change materials (PCM) since it impedes the realization of multi-level memories. Different interpretations have been proposed, but we focus here on the structural relaxation of amorphous GeTe, chosen because it is the simplest system that is representative of the wider class of GST alloys, lying along the GeTe-Sb2Te3 composition line of the GeSbTe phase diagram. We investigate the structure of amorphous GeTe using Density Functional Theory based Molecular Dynamics, using either the standard Generalized Gradient Approximation, or more elaborate Van der Waals approximation. New insight is provided on the stability of homopolar GeGe bonds and tetrahedral Ge bonding, in relation with the resistance drift phenomenon, that is investigated experimentally using photothermal deflection spectroscopy experiments [less ▲]Detailed reference viewed: 16 (2 ULg) Classical analogy for the deflection of flux avalanches by a metallic layerSilhanek, Alejandro Conference (2015, May 17)Motivated by the experimental observation of the exclusion of magnetic flux avalanches in a superconducting sample partially covered by a conducting capping layer, we have investigated the simpli fied ... [more ▼]Motivated by the experimental observation of the exclusion of magnetic flux avalanches in a superconducting sample partially covered by a conducting capping layer, we have investigated the simpli fied case of the interaction of a magnetic charge (monopole and dipole) with a semi-in finite conducting plane. We have found that early theoretical descriptions for the damping enhancement due to the metallic sheet needed a correction at large vortex velocities where a decrease of the damping coe fficient is expected. We also demonstrate that vortex trajectories are strongly modi fied when penetrating into the area covered by the metallic sheet and may even be fully diverted from that area thus providing a qualitative explanation for the bending of the trajectories of flux avalanches. Our fi ndings may be extended to study the damping of Larkin-Ovchinnikov vortex instabilities and phase-slip lines in current driven systems. [less ▲]Detailed reference viewed: 26 (1 ULg) Using stable isotopes to unravel the role of sea-ice in the methane cycleSapart, C.J.; Zhou, Jiayun; Carnat, G. et alConference (2015, May 16)Methane plays an important role in the Earth’s climate system. The atmospheric methane concentration has increased in concert with the industrialization, but since the mid 80’s the methane growth rate ... [more ▼]Methane plays an important role in the Earth’s climate system. The atmospheric methane concentration has increased in concert with the industrialization, but since the mid 80’s the methane growth rate decreased to reach a near-zero level in 2000 and started to increase again from 2007 on. However, the underlying variations in sources and/or sinks that cause these variations are to date not well understood. To predict future climate, it is essential to unravel the processes controlling the methane cycle, especially in the Arctic regions, which are highly vulnerable to climate change and contain large methane reservoirs. Recently, an unexpected methane excess has been reported above Arctic sea-ice showing that sea-ice might play a significant role in the methane cycle. Nonetheless, the nature of the process leading to methane production in or nearby sea-ice has not yet been identified. We applied a new multi-proxy approach merging atmospheric chemistry, glaciology and biogeochemistry to understand and quantify the processes responsible for the methane excess above sea-ice. We performed methane isotope (d13C and dD) analyses on sea-ice samples, as well as geochemical measurements, to determine the possible pathways involved in methane production and removal in or nearby sea-ice. We will present results from sea-ice samples drilled above the shallow-shelf in Barrow (Alaska) from January to June 2009 as well as above deep Southern Ocean locations in 2013. It has long been thought that methane present in sea-water would oxidize in or under the sea ice, but our first stable isotope sea ice profiles show no significant oxidation pattern. On the other hand, we show that landfast sea ice from both the shallow-shelf of Barrow and our deeper Southern Ocean site is supersaturated in methane and that under specific conditions methane is likely formed in the ice. [less ▲]Detailed reference viewed: 26 (0 ULg) Drivers of inorganic carbon dynamics in first-year sea ice: A model studyMoreau, S.; Vancoppenolle, M.; Delille, Bruno et alConference (2015, May 16)Sea ice is an active source or a sink for carbon dioxide (CO2), although to what extent is not clear. Here, we analyze CO2 dynamics within sea ice using a one-dimensional halo-thermodynamic sea ice model ... [more ▼]Sea ice is an active source or a sink for carbon dioxide (CO2), although to what extent is not clear. Here, we analyze CO2 dynamics within sea ice using a one-dimensional halo-thermodynamic sea ice model including gas physics and carbon biogeochemistry. The ice-ocean fluxes, and vertical transport, of total dissolved inorganic carbon (DIC) and total alkalinity (TA) are represented using fluid transport equations. Carbonate chemistry, the consumption and release of CO2 by primary production and respiration, the precipitation and dissolution of ikaite (CaCO3•6H2O) and ice-air CO2 fluxes, are also included. The model is evaluated using observations from a 6-month field study at Point Barrow, Alaska and an ice-tank experiment. At Barrow, results show that the DIC budget is mainly driven by physical processes, wheras brine-air CO2 fluxes, ikaite formation, and net primary production, are secondary factors. In terms of ice-atmosphere CO 2 exchanges, sea ice is a net CO2 source and sink in winter and summer, respectively. The formulation of the ice-atmosphere CO2 flux impacts the simulated near-surface CO2 partial pressure (pCO2), but not the DIC budget. Because the simulated ice-atmosphere CO2 fluxes are limited by DIC stocks, and therefore < 2 mmol m-2 day-1, we argue that the observed much larger CO2 fluxes from eddy covariance retrievals cannot be explained by a sea ice direct source and must involve other processes or other sources of CO2. Finally, the simulations suggest that near surface TA/DIC ratios of 2, sometimes used as an indicator of calcification, would rather suggest outgassing. [less ▲]Detailed reference viewed: 25 (0 ULg) Savoirs savants et savoirs professionnels dans les humanités : une nouvelle configuration pour les savoirs critiques ?Caeymaex, Florence Conference (2015, May 15)Detailed reference viewed: 4 (0 ULg) Why are flux avalanches deflected by a metallic layer?Brisbois, Jérémy Conference (2015, May 15)Sudden avalanches of magnetic flux bursting into a superconducting sample are deflected from their trajectories when they encounter a conductive layer deposited on top of the superconductor. Remarkably ... [more ▼]Sudden avalanches of magnetic flux bursting into a superconducting sample are deflected from their trajectories when they encounter a conductive layer deposited on top of the superconductor. Remarkably, in some cases the flux is totally excluded from the area covered by the conductive layer. Even if this phenomenon has been known for a few years, there is currently no theoretical model describing it. Moreover, the question whether the deflection would also be observed for a single vortex entering the region covered by a metallic layer is still unanswered. In this work we use the magneto-optical imaging (MOI) technique, based on the Faraday effect, to show that a conductive layer (Cu) can repel flux avalanches triggered in an underlying superconducting film (Nb) (see figure). We present a simple classical model that accounts for the deflection of a single vortex and considers a magnetic monopole approaching a semi-infinite conductive plane. This model suggests the important role played in the avalanche deflection by electromagnetic braking, arising from the eddy currents induced by the moving vortex in the metal. Moreover, we have found a decrease of the vortex damping coefficient due to the metallic sheet at large vortex velocities, correcting early theoretical descriptions where a linear behaviour was proposed. [less ▲]Detailed reference viewed: 26 (4 ULg) What makes the invasive Harmonia axyridis so successful? Six years of research in Gembloux provide additional answersFassotte, Bérénice ; Durieux, Delphine ; Vandereycken, Axel et alConference (2015, May 14)Following the introduction of the invasive species Harmonia axyridis (Pallas) in Europe, many research works were conducted on its ecological, economic and social impacts. Recently, our team has been ... [more ▼]Following the introduction of the invasive species Harmonia axyridis (Pallas) in Europe, many research works were conducted on its ecological, economic and social impacts. Recently, our team has been involved in the characterization of the behavioral traits making this lady beetle species so successful. The main conclusions of two PhD works will be shortly presented: (1) Through a six-year inventory performed in Belgian agroecosystems, we have demonstrated that H. axyridis has become well established and was among the most abundant aphidophagous predatory species, causing a severe depression of biodiversity, even if communities of aphid predators are still quite diversified. (2) The social issues associated with the establishment of overwintering aggregations in human constructions were also carefully investigated. We have demonstrated the importance of social interactions on the establishment and cohesion of the aggregates. Finally, we have demonstrated that the deposition of a set of saturated and non-saturated hydrocarbons on the surfaces where the lady beetles were settling on, allowed their conspecifics to follow their markings and join the group. [less ▲]Detailed reference viewed: 46 (9 ULg) Preclinical molecular imaging: from the laboratory bench to the patient.Plenevaux, Alain Conference (2015, May 14)Preclinical molecular imaging plays a key role in the study of diseases and the development – evaluation - validation of novel treatments and diagnostic techniques. The actual aim is to facilitate the ... [more ▼]Preclinical molecular imaging plays a key role in the study of diseases and the development – evaluation - validation of novel treatments and diagnostic techniques. The actual aim is to facilitate the translation of novel therapies and diagnostic agents into patients by providing in vivo proof-of-principle data in animal models of diseases and accordingly match some of the legal requirements before human clinical trials. The real power of preclinical imaging stems in the fact that the in vivo data are collected non-invasively thus making longitudinal studies possible. The evolution of the disease or the actual impact of innovative treatments can be evaluated in the same animal over a long period of time. The major modalities used in preclinical molecular imaging (all present in our laboratory) are the positron emission tomography (microPET), the x-ray tomodensitometry (microCT) and the magnetic resonance imaging (microMRI). The Cyclotron Research Centre (CRC) at ULg is a multidisciplinary laboratory which relies on i.e. a medical cyclotron for radioisotope productions, a radiochemistry unit for the development of new radiopharmaceuticals and process automations, a GMP unit for the radiopharmaceutical productions, a preclinical imaging unit and a clinical imaging unit (with MRI, PET, EEG, TMS…). All expertise and qualified staff are present on site. The CRC has all permissions and approvals for radiopharmaceutical productions and human clinical trials. During this presentation will take the recent development of the first SV2A radioligand [18F]UCB-H to illustrate how the CRC can bring new ideas from the laboratory bench to the patient. [less ▲]Detailed reference viewed: 20 (0 ULg) First evidence of a volatile sex pheromone in Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae)Fassotte, Bérénice ; Fischer, Christophe ; Durieux, Delphine et alConference (2015, May 13)To date, volatile sex pheromones have not been identified in the Coccinellidae family; yet, various studies have suggested that such semiochemicals exist. Here, we collected volatile chemicals released by ... [more ▼]To date, volatile sex pheromones have not been identified in the Coccinellidae family; yet, various studies have suggested that such semiochemicals exist. Here, we collected volatile chemicals released by virgin females of the multicolored Asian lady beetle, Harmonia axyridis (Pallas), which were either allowed or not allowed to feed on aphids. Virgin females in the presence of aphids, exhibited “calling behavior”, which is commonly associated with the emission of a sex pheromone in several Coleoptera species. These calling females were found to release a blend of volatile compounds that is involved in the remote attraction (i.e., from a distance) of males. Gas Chromatography Mass Spectrometry (GC-MS) analyses revealed that (–)-β-caryophyllene was the major constituent of the volatile blend (ranging from 80 to 86%), with four other chemical components also being present; β-elemene, methyl-eugenol, α-humulene, and α-bulnesene. In a second set of experiments, the emission of the five constituents identified from the blend was quantified daily over a 9-day period after exposure to aphids. We found that the quantity of all five chemicals significantly increased across the experimental period. Finally, we evaluated the activity of a synthetic blend of these chemicals by performing bioassays which demonstrated the same attractive effect in males only. The results confirm that female H. axyridis produce a volatile sex pheromone. These findings have potential in the development of more specific and efficient biological pest-control management methods aimed at manipulating the behavior of this invasive lady beetle. [less ▲]Detailed reference viewed: 57 (8 ULg) Dark anti-atomsWallemacq, Quentin Conference (2015, May 13)Detailed reference viewed: 1 (0 ULg) On the nature of cosmological timeHauret, Clémentine Conference (2015, May 13)Detailed reference viewed: 12 (4 ULg) Epithelial-to-Mesenchymal Transitions modulate interactions between Circulating Tumor Cells and the coagulation system: implication for the metastatic spread.Bourcy, M; Suarez-Carmona, M; Francart, ME et alConference (2015, May 13)Detailed reference viewed: 8 (0 ULg) Exploring Tumor lipid Heterogeneity by High-Resolution Mass Spectrometry Imaging.Cimino, Jonathan ; Far, Johann ; Debois, Delphine et alConference (2015, May 13)Detailed reference viewed: 10 (2 ULg) First experimental realization of an Iron Magneto-Optical TrapBastin, Thierry ; Crauwels, Justine ; Huet, Nicolas et alConference (2015, May 13)Detailed reference viewed: 47 (4 ULg) Jupiter's equatorward auroral featuresDumont, Maïté ; Grodent, Denis ; Radioti, Aikaterini et alConference (2015, May 13)Detailed reference viewed: 19 (3 ULg) Auroral emissions at Jupiter and Saturn, at the crossroads of Astrophysics Geophysics and Plasma PhysicsGrodent, Denis Conference (2015, May 13)Auroral physics is at the intersection of more general fields of physics such as Astrophysics, Geophysics and Plasma Physics. In particular, the giant planets Jupiter and Saturn may be seen as slow ... [more ▼]Auroral physics is at the intersection of more general fields of physics such as Astrophysics, Geophysics and Plasma Physics. In particular, the giant planets Jupiter and Saturn may be seen as slow rotating pulsars. For these two planets, there is a direct link between this pulsar-like behaviour and the auroral processes that are taking place in their atmosphere. We will take the example of Jupiter to illustrate haw the aurora is generated in the magnetosphere as a result of the volcanic activity of the moon Io. [less ▲]Detailed reference viewed: 21 (0 ULg) Is the natural shape of ions in the gas phase spherical ? The allegory of the cave (Plato) applied in mass spectrometryFar, Johann ; Haler, Jean ; Kune, Christopher et alConference (2015, May 13)The transfer of ions from solution to gas phase is a critical step to produce « native species ». Coming from a highly solvating medium, ionic species will tend to find new equilibrium conformations in ... [more ▼]The transfer of ions from solution to gas phase is a critical step to produce « native species ». Coming from a highly solvating medium, ionic species will tend to find new equilibrium conformations in the gas phase. The pathway to reach the thermodynamically stable conformation(s) involves crossing potential barriers according to the type of interactions involved. When these barriers are too high compared to the internal energy of the ions, it may result in a “partial memory” (as structural preservation) of the conformation in solution. In order to evaluate the effect of the solvent evaporation and of the various collision processes encountered by the ions in the mass spectrometer we based our strategy on the determination of deviations from a spherical shape, supposed to be the natural state of ions in the gas phase. [less ▲]Detailed reference viewed: 47 (19 ULg) Anti-E6/E7/MCL1 pegylated lipoplexes for a topical treatment of HPV16 induced lesionsLechanteur, Anna ; Furst, Tania ; Evrard, Brigitte et alConference (2015, May 13)Detailed reference viewed: 11 (1 ULg) À l'Est, rien de nouveau ? Diversité des débuts du Paléolithique supérieur de l'Europe orientale à l'Asie centraleFlas, Damien Conference (2015, May 13)Detailed reference viewed: 16 (0 ULg) Epithelial-to-mesenchymal transitions and the metastatic spreadGilles, Christine Conference (2015, May 13)Detailed reference viewed: 11 (2 ULg) Anticoherence of multiqubit symmetric statesBaguette, Dorian ; Bastin, Thierry ; Martin, John Conference (2015, May 13)Detailed reference viewed: 32 (1 ULg) Camps, lieux de mobilité-immobilité: une analyse du processus de sécurisation de l'immigration à partir des camps des pays de première entrée dans l'UEDa Silva, Amanda Carolina Conference (2015, May 13)Detailed reference viewed: 21 (0 ULg) Deciphering mechanisms of cancer adaptation to targeted therapySounni, Nor Eddine Conference (2015, May 12)Targeted therapies designed towards specific molecules such as the receptor tyrosine kinase inhibitors (TKRIs) emerged in recent years and are currently in clinical use for multiple tumor types ... [more ▼]Targeted therapies designed towards specific molecules such as the receptor tyrosine kinase inhibitors (TKRIs) emerged in recent years and are currently in clinical use for multiple tumor types. Unfortunately, their efficacy is limited, in part due to the development of resistance to treatment. The first part of my talk will be focused on mechanisms of adaptation to antiangiogenic therapy using RTKIs in preclinical studies. Our recent data suggest that RTKIs withdrawal results in accelerated tumor progression and metastasis. We found that antiangiogenic therapy induced a metabolic shift in cancer and stromal cells to a glycolytic and hypoxic state during treatment, which was reversed upon therapy withdrawal, resulting in a shift to de novo lipogenesis and increased TCA cycle activity to promote tumor regrowth. Targeting lipid metabolism using pharmacological inhibition or specific knockdown of FASN suppressed the RTKIs withdrawal–associated tumor regrowth and metastasis. The second part of my talk will shed light on EGFR signaling in triple negative breast carcinomas (TNBC) and difficulties in targeting EGFR signaling. Although anti-EGFR treatments have shown promise in some cancers, single agent therapy is ineffective in unselected TNBC and response of patients is often limited due to the acquisition of resistance. Accumulating data have appreciated the importance of the cooperation of EGFR with other cell surface proteins to induce cell transformation, growth and survival. In this context, we recently reported that MT4-MMP, a membrane-type matrix metalloproteinase (MMP17) interacts with EGFR and enhances EGFR signaling and TNBC cell proliferation. I will also talk about our preclinical models and the opportunity to identify novel potential combination of treatment regimens that would increase the clinical benefit of targeted therapy against VEGF and EGFR. [less ▲]Detailed reference viewed: 16 (2 ULg) Remote sensing of the atmospheric composition in the infrared spectral region within the Network for the Detection of Atmospheric Composition Change (NDACC) and the Total Carbon Column Observing Network (TCCON)Notholt, J; Blumenstock, T; Deutscher, N et alConference (2015, May 12)Remote sensing has been established as a powerful tool in atmospheric research. Throughout the last decades satellite and ground-based remote sensing instruments and methods have been developed to sample ... [more ▼]Remote sensing has been established as a powerful tool in atmospheric research. Throughout the last decades satellite and ground-based remote sensing instruments and methods have been developed to sample the atmosphere from the microwave to the UV/Vis. The international ground based networks NDACC-IR and TCCON are based on solar absorption spectrometry in the infrared. Both networks consist of more than 30 observations sites around the globe, from the high Arctic through mid-latitudes and the tropics to the southern hemisphere and Antarctica. NDACC concentrates on stratospheric observations in relation to ozone chemistry, in many instances, information on the vertical distribution of the target species is determined. Measured trace gases include O3, HCl, HF, HNO3, ClONO2 and many others. In addition, the tropospheric composition is studied by measuring anthropogenic and biogenic species including HCN, OCS, H2O, CO, CH2O, C2H6, and C2H2. The aim of TCCON is to acquire accurate and precise column-averaged abundances of CO2, CH4, N2O, i.e. atmospheric trace gases which have a very small natural variability. TCCON measurements are linked to WMO calibration scales by comparisons with co-incident in situ profiles measured from aircraft or balloon. Results from both networks have been used in many studies in relation to stratospheric ozone chemistry, air-pollution, and with regard to the carbon-cycle. Long-term series are necessary for trend analysis, gaining insight into annual and longer term variability and placing into context shorter term process studies. Due to the similar observation geometry, the ground-based observations are optimally suitable for satellite and model validation and form an essential part of many satellite projects. They also play an important role in the validation of the Copernicus Atmospheric Monitoring Service. In our contribution we will give an overview on the current status of both networks, ongoing efforts to improve network coverage, precision and accuracy, and several examples of scientific highlights. [less ▲]Detailed reference viewed: 87 (1 ULg) On the nature of cosmological timeHauret, Clémentine Conference (2015, May 11)Detailed reference viewed: 9 (2 ULg) Etude de l'évolution à long terme du méthane et de certains de ses dérivés au départ d'observations obtenues à la station scientifique du JungfraujochBader, Whitney Conference (2015, May 11)Detailed reference viewed: 11 (6 ULg) Les matérialités de la politiqueCaeymaex, Florence Conference (2015, May 11)Detailed reference viewed: 2 (0 ULg) IntroductionCormann, Grégory Conference (2015, May 11)Detailed reference viewed: 22 (3 ULg) The limits of sustainable metal resources availabilityPirard, Eric Conference (2015, May 11)The sustainable availability of raw materials used in manufacturing advanced products is a question that consumers will raise more and more in the future. In order to answer this legitimate request, it is ... [more ▼]The sustainable availability of raw materials used in manufacturing advanced products is a question that consumers will raise more and more in the future. In order to answer this legitimate request, it is mandatory to define characterization factors capable of taking into account the geological scarcity of an element and also the social and environmental impact of its exploitation and beneficiation. But the specificities of metals also raise the question of their availability from recycling of end-of-life products. It makes no doubt that many products have a dispersive action because of their very low metal contents or because of the complex form under which the metal has been incorporated. The metal availability from recycling will need recycling indices to be developed and specific actions to be taken to fight against improper applications causing harmful resource degradation for the future generations [less ▲]Detailed reference viewed: 34 (3 ULg) QUASARPOL: A catalog of quasar linear polarisation dataSluse, Dominique ; Hutsemekers, Damien Conference (2015, May 11)Quasar polarisation measurements are of great importance for understanding the geometry of the inner regions surrounding supermassive black holes. Unfortunately, measurements are generally heterogeneous ... [more ▼]Quasar polarisation measurements are of great importance for understanding the geometry of the inner regions surrounding supermassive black holes. Unfortunately, measurements are generally heterogeneous, and spread over hundreds of papers published in the literature. At the exception of some recent catalogs available on VIZIER or via the Virtual Observatory, there is no dedicated facility to explore those data. This matter of fact, strongly limits the exploitation of polarisation data. For the early papers, that have pioneered the field of quasar polarimetry and gathered numerous polarisation measurements, tables are not available in electronic format, further complicating the use of those invaluable data. We will present QUASARPOL, an effort for constructing a first unified catalog of several thousands of optical linear polarisation measurements of quasars and blazars. An overview of the actual catalog structure, technical difficulties, and of the status of the collected data will be presented. This catalog aims at providing an easy access to polarisation data for the community (familiar or not with polarisation measurements). The current catalog will not be exhaustive. We rather encourage its completion in a collaborative manner, with spontaneous contribution from the community in a simple tabular format. [less ▲]Detailed reference viewed: 28 (7 ULg) Prevention of Synovial Membrane Inflammation & Cartilage Degradation by a Novel ChitosanHenrotin, Yves ; Oprenyeszk, Frédéric ; Dubuc, Jean-Emile et alConference (2015, May 10)Detailed reference viewed: 19 (4 ULg) Emil Cioran à l’ère du numérique. L’énonciation éditoriale à travers la lecture d’écranVintila, Elena-Georgiana Conference (2015, May 09)Le numérique s’emparant de notre quotidien est une situation qui ne surprend plus. Cela fait que d’importantes activités se déploient en principal à l’aide de ce moyen. Comme c’est le cas de la lecture ... [more ▼]Le numérique s’emparant de notre quotidien est une situation qui ne surprend plus. Cela fait que d’importantes activités se déploient en principal à l’aide de ce moyen. Comme c’est le cas de la lecture. Une nuance est à prendre en compte ici : la présentation d’un livre et sa réception par le public lecteur est aujourd’hui possible à travers les sites marchands des livres, comme c’est le cas de l’Amazon.fr. Emil Cioran y trouve sa place. [less ▲]Detailed reference viewed: 26 (5 ULg) RADIOPHARMACY GMP QC HPLC VALIDATIONAerts, Joël ; Giacomelli, Fabrice ; Hubert, Philippe et alConference (2015, May 09)Detailed reference viewed: 38 (4 ULg) Partial volume effect impact on PET preclinical dosimetry: a simulation studySeret, Alain ; Bahri, Mohamed Ali ; Bretin, Florian et alConference (2015, May 09)Detailed reference viewed: 17 (3 ULg) Evolutions récentes de l’évaluation de la recherche. Quelques concepts pertinentsLeclercq, Bruno Conference (2015, May 09)Detailed reference viewed: 37 (5 ULg)