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See detailSeasonal dynamics of organic carbon in the Tana River Basin, Kenya
Tamooh, F.; Meysman, F.; Marwick, T.R. et al

Conference (2012, April 22)

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See detailHistorical changes in carbon dioxide (CO2) and dimethyl sulphide (DMS) emissions in the eutrophied Southern North Sea
Gypens, N.; Borges, Alberto ULg; Lancelot, C.

Conference (2012, April 22)

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See detailVariability of shelf sea pH and surface water CO2 in response to North Atlantic Oscillation forcing
Salt, L.; Thomas, H.; Prowe, A.E.F. et al

Conference (2012, April 22)

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See detailArthur a un cancer: pour nous, frères et soeurs, pas facile à vivre
BADOT, Isabelle ULg; Missotten, Pierre ULg

Conference (2012, April 21)

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See detailUne épée pour saint Pierre ? Les princes français et le Grand Schisme d’Occident
Masson, Christophe ULg

Conference (2012, April 20)

Afin d’assurer le succès des idées premières – prétentions territoriales ou guerre sainte – qui ne pouvait passer que par des entreprises militaires de grande ampleur, on les légitima par une autre série ... [more ▼]

Afin d’assurer le succès des idées premières – prétentions territoriales ou guerre sainte – qui ne pouvait passer que par des entreprises militaires de grande ampleur, on les légitima par une autre série d’idées, plus à même de mobiliser les énergies, et donc les armes. La défense du pape d’Avignon fut l’occasion pour Louis Ier, Louis II – dans une moindre mesure – et Louis Ier d’Orléans de financer leurs troupes à destination de Naples, pour les deux premiers, de Milan, pour le dernier. De la même manière, dans le cas de Boucicaut et de sa lutte contre les Infidèles, il fallait prendre la place de lieutenant du roi à Gênes pour, ensuite, profiter des ressources militaires, en l’occurrence maritimes, de la toujours riche république marchande. Aussi, pour répondre à la question que pose cet ouvrage, on peut affirmer qu’idées et armes furent interdépendantes lors de ces conflits ayant comme point de mire la foi, une foi qui s’effaça très souvent derrière les ambitions seigneuriales des protagonistes [less ▲]

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See detailExercer une pratique réflexive au quotidien à l'aide d'un log book
VIERSET, Viviane ULg

Conference (2012, April 20)

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See detailReflections on the notion of 'consumer behaviour'
Hendrickx, Kim ULg

Conference (2012, April 20)

Today, consumer behavior has become a key concept in scientific publications and in international public health strategies. Both 'behavior' and the 'consumer' are in the title of the 3rd annual conference ... [more ▼]

Today, consumer behavior has become a key concept in scientific publications and in international public health strategies. Both 'behavior' and the 'consumer' are in the title of the 3rd annual conference of the Belgian Nutrition Society. This paper proposes a reflection on these concepts, and invites for further discussion. Firstly, the 'consumer' and his attributes will be briefly explored through an analysis of the Health Claims Regulation EC No 1924/2006. This document, intended to protect consumers from misleading information, uses a model of the consumer rooted in rational choice theory. Secondly, as medical sociologist David Armstrong (2009) has shown, the term 'behavior' has been brought in relation to health outcomes only relatively recently in medicine and public health. As such, it has come to be defined as a modifiable risk factor. I argue that European public health strategies have integrated this definition of behavior and the related idea of 'lifestyle' into rational choice theory. As such, 'behavior' and 'lifestyle' frame problems of health and disease in a specific way. The third section of this paper will confront this model of problem-framing with different understandings of 'behavior' coming from historical and contemporary sociological research. [less ▲]

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See detailBilan prématuré d'une expérience collective d'enseignement
Cormann, Grégory ULg

Conference (2012, April 20)

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See detailIn nome della libertà: l’aspiration à la liberté dans les écrits de Francesco Guicciardini
Miesse, Hélène ULg

Conference (2012, April 20)

On peut distinguer dans la correspondance de Guichardin trois moments historiques au cours desquels la liberté est mise en danger par les armes. Premièrement, l’ambassade espagnole de 1512, lorsque le ... [more ▼]

On peut distinguer dans la correspondance de Guichardin trois moments historiques au cours desquels la liberté est mise en danger par les armes. Premièrement, l’ambassade espagnole de 1512, lorsque le jeune Guichardin est envoyé en mission auprès du roi d’Espagne pour sonder ses intentions. Ensuite, l’année 1525, moment de constitution de la ligue de Cognac, durant laquelle Guichardin consacre une partie de son temps à la rédaction de discours contradictoires sur le meilleur comportement politico-militaire à adopter pour « libérer l’Italie ». Enfin, l’année 1527 qui voit le terrible sac de Rome. Si la notion de liberté est généralement associée au bien-être, à la paix et à la santé, de Florence dans la première période, de la péninsule dans le deuxième moment, de Florence et de la Péninsule dans le troisième et justifie – paradoxalement – le passage aux armes pour la défendre, la conserver ou, pire, la restituer, selon les moments, le mot « liberté » ne recouvre toutefois pas le même sens. Lorsqu’il s’agit de protéger Florence, Guichardin entend défendre l’autogestion de la ville pourtant sous gouvernement médicéen ; la « liberté commune » ou « liberté d’Italie » renvoient à la seule absence d’étrangers dans la péninsule, alors qu’en 1527, lors du retour à un gouvernement populaire à Florence, la « libertà della città » n’est autre que l’appellation pour désigner ce même gouvernement populaire républicain. Tandis que, sur le terrain, les soldats s’affrontent pour « libérer » tel morceau de l’Italie – au sens renaissant d’ensemble de cités-état vivant en équilibre – voire la péninsule entière de tout occupant étranger, dans ses lettres Guichardin mène le même combat, tentant par la force de la plume de faire fléchir les uns et de convaincre les autres, n’hésitant pas à exploiter les multiples sens recouverts par le mot « liberté ». [less ▲]

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See detailPilot project « Walphy » : Walloon experimentation of river restoration
Peeters, Alexandre ULg; Verniers, Gisèle; de le Court, Bernard et al

Conference (2012, April 20)

According to the Water Framework Directive (WFD 2000/60), our rivers and water bodies are required to achieve the “good ecological status” by 2015. This requirement is related to the physico-chemical ... [more ▼]

According to the Water Framework Directive (WFD 2000/60), our rivers and water bodies are required to achieve the “good ecological status” by 2015. This requirement is related to the physico-chemical, biological water quality as well as the hydromorphological quality. In this context, a LIFE Environment project, co-founded by the European Union and the Service Publique de Wallonie, was launched in 2009 for a period of five years. It aims to realize the experimental and demonstrative river restoration works on three “at risk” water bodies, based on two axes: longitudinal continuity and transversal continuity. The first two selected water bodies (Bocq, eastern tributary of the Meuse) are suitable for the restoration works which concern the longitudinal continuity due to the presence of dams and other obstacles between 1 and 3 m high. These works consist in dam management (weir removal or fish ladders) taking into account hydromorphological (bedload transport) and biological (invertebrate or fish species free movement) impacts. The third water body (Eau Blanche, western tributary of the Meuse) presents straightened rivers with artificial banks which consequently lead to poor connections between the stream and its floodplain. This water body is therefore appropriated for the works based on the transversal continuity recovery. These works consist in enhancing straightened river channel and restoring meanders or banks. Until now, these works have been realized on more than 5 km. These works are being monitored on the basis of geomorphological and ecological analysis. The geomorphological monitoring is based on surveys conducted before and after the works. It concerns the bedload transport, the clogging of the gravel layer and the morphological changes of the river following the works. The ecological monitoring is based on two indicators: macroinvertebrates and fishes. Standardized and repeatable methods were developed to compare the situation before and after the works, especially through the analysis of microhabitats. In addition, we use another two complementary indexes of physical quality for this monitoring. Developed by the consulting office Teleos, these indexes have a fish orientation and have been implemented in many of our stations. [less ▲]

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See detailIntroduction
Dumont, Jonathan ULg; Masson, Christophe ULg

Conference (2012, April 20)

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See detailL’inflammation induite par les acides gras libres
L'Homme, Laurent ULg

Conference (2012, April 19)

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See detailCrise de la socialisation au sein d'une Société du travail sur Soi
Vrancken, Didier ULg

Conference (2012, April 19)

Ainsi que l’ont bien identifié les organisateurs de ce colloque, il est difficile d’évoquer aujourd’hui le thème de la socialisation en sociologie sans lui accoler le terme de crise. A telle enseigne que ... [more ▼]

Ainsi que l’ont bien identifié les organisateurs de ce colloque, il est difficile d’évoquer aujourd’hui le thème de la socialisation en sociologie sans lui accoler le terme de crise. A telle enseigne que l’on peut avancer qu’une réelle lecture « déclinologique » s’est répandue dans de nombreux pays européens et en particulier dans le domaine de la sociologie francophone. Ainsi cette crise de la socialisation va-t-elle souvent de pair avec la montée de l’individualisme, se déclinant notamment autour des thèmes du « retour de l’acteur », de la montée du nouvel « individualisme », de l’émergence du « sujet », de la « singularité », de la « subjectivation », etc. Tous ces thèmes laissant de plus en plus entrapercevoir un individu autonome mais surchargé par le poids des responsabilités. Un individu mis à l’épreuve (de la vie, des autres, de lui-même), un individu tenu de miser sur ses capacités mais en même temps saisi par le doute, celui d’être continuellement à la hauteur, d’« être capable ». De plus en plus d’études en sciences humaines et sociales se sont penchées sur la face sombre de cette évolution, celle de l’émergence de pathologies du lien social telles que les addictions, la dépression, le harcèlement moral, la souffrance sociale et ses multiples dimensions : souffrance au travail face à l’organisation ; précarité sociale ou encore appel constant à la subjectivité pour s’affirmer. Dans cette optique, la crise est alors perçue comme un affaiblissement du lien social en regard des sociétés qui nous ont précédés. Cette assertion sera pleinement discutée dans le cadre de cette conférence. [less ▲]

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See detailLeonardo da Vinci nella collezione reale di pitture
Fagnart, Laure ULg

Conference (2012, April 19)

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See detailAdvances in biomaterials to repair cartilage
Maquet, Véronique; Chausson, Mickael; Gautier, Sandrine et al

Conference (2012, April 19)

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See detailWhat is new in anemia treatment in CKD since 2010?
Krzesinski, Jean-Marie ULg

Conference (2012, April 18)

•Partial correction (Hb in the range of 10-11.5 g/dL) of CKD-related anemia appears a safer strategy during the last 5y. So recommendation is to start ESA only when Hb <10 and to avoid too high ESA dose ... [more ▼]

•Partial correction (Hb in the range of 10-11.5 g/dL) of CKD-related anemia appears a safer strategy during the last 5y. So recommendation is to start ESA only when Hb <10 and to avoid too high ESA dose (CE DOSE study ongoing in HD)! •Identify resistant patients and try to improve it. •Importance of adequate iron management and of hepcidin role in the all-mortality risk in CKD. Newer strategies for correcting anemia are currently explored [less ▲]

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See detailPrazeres do raio-x: estudo de um striptease radiográfico
Sturnack, Lionel ULg

Conference (2012, April 18)

O striptease que propomos analisar é na verdade o título de uma obra que pertence à produção da artista italiana Benedetta Bonichi. Trata-se de uma composição mista, a meio caminho entre os raios-x e a ... [more ▼]

O striptease que propomos analisar é na verdade o título de uma obra que pertence à produção da artista italiana Benedetta Bonichi. Trata-se de uma composição mista, a meio caminho entre os raios-x e a fotografia. “Striptease” chamou a nossa atenção por várias razões. Com certeza, por seu caráter surpreendente, sendo uma cena erótica e ao mesmo tempo uma radiografia. Mas também por sua estética particular em relação aos outros artistas que desenvolvem uma técnica similar. O propósito de nossos passos é levar em consideração o lugar da obra estudada no espaço de realizações em raio-x artístico, numa perspectiva semiótica. Pretendemos desta maneira chegar à descrição fina de “Striptease, por meio do estabelecimento de um conjunto de formantes plásticos estáveis funcionando como base sobre a qual se correlacionam e se diferenciam os raios-x artísticos estudados. Por isso, desenvolveremos o estudo segundo três etapas gerais. Com a primeira, tentaremos efetuar uma descrição de “Striptease” segundo os três eixos da leitura plástica padrão, tal como foram trabalhados por Jean-Marie Floch: cromático, eidético e topológico. Na segunda etapa, adotaremos o mesmo ponto de vista para a descrição plástica de cinco obras de quatro outros artistas. O interesse da segunda parte consiste em ver como se atualizam as unidades plásticas em cada realização particular, a fim de observar as suas possíveis convergências e divergências. Na última etapa, poderemos considerar a estética de cada obra à luz das atualizações plásticas e das integrações entre elas com outros patamares temáticos. Conseguiremos, finalmente, entender a pertinência e a particularidade de “Striptease” como obra com vocação reflexiva a respeito da prática do raio-x artístico. [less ▲]

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See detail1-84 PTH and KDIGO Guidelines
CAVALIER, Etienne ULg

Conference (2012, April 18)

Detailed reference viewed: 172 (4 ULg)
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See detailNew alginate-chitosan hydrogel to repair cartilage
Henrotin, Yves ULg

Conference (2012, April 18)

Detailed reference viewed: 23 (0 ULg)
See detailDu diagnostic à l'intervention en entreprise: quelle réalité, quelles limites?
Hansez, Isabelle ULg

Conference (2012, April 17)

Detailed reference viewed: 35 (5 ULg)
See detailAnémies et insuffisance rénale : quoi de neuf?
Krzesinski, Jean-Marie ULg

Conference (2012, April 17)

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See detailLearning Latin: Grammars and Annotations in Latin Papyri
Scappaticcio, Maria Chiara ULg

Conference (2012, April 14)

Detailed reference viewed: 26 (1 ULg)
See detailmigrations congolaises en Belgique et géographies religieuses
Demart, Sarah ULg; Melice, Anne ULg; Meiers, Bénédicte ULg

Conference (2012, April 13)

Detailed reference viewed: 32 (1 ULg)
See detailparticipation politique, diaspora congolaise et transnationalismes
Demart, Sarah ULg; Bodeux, Leila

Conference (2012, April 13)

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See detailMonstrosity, Hunger, and Resistance
Delville, Michel ULg; Norris, Andrew

Conference (2012, April 12)

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See detailMagnetic shielding properties of a cut superconducting hollow cylinder : modelling and experiment
Vanderbemden, Philippe ULg; Elschner, Steffen; Hobl, A et al

Conference (2012, April 11)

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See detailOn the accurate selection of asymptotic detection thresholds for Infit and Outfit indexes of person fit
Magis, David ULg; Raîche, Gilles; Béland, Sébastien

Conference (2012, April 11)

It exists a bunch of person fit indexes but Lz (Drasgow, Levine, & Williams, 1985), Infit mean square W (Wright & Masters, 1982) and Outfit mean square U (Wright & Stone, 1979) are certainly the most ... [more ▼]

It exists a bunch of person fit indexes but Lz (Drasgow, Levine, & Williams, 1985), Infit mean square W (Wright & Masters, 1982) and Outfit mean square U (Wright & Stone, 1979) are certainly the most popular. However, they have the undesirable property that their limiting distribution depends on the true ability level, which is generally unknown. In addition, the asymptotic distribution of U and W indexes was not clearly stated. Snijders (2001) proposed a generalization of the index Lz to incorporate estimated ability levels in its computation, and derived subsequent asymptotic normality of this modified Lz* index. The purpose of this talk is threefold. First, the generalization of Lz to Lz* is briefly sketched. Second, it is shown how this generalization can be successfully applied to both U and W indexes, yielding generalized U* and W* indexes respectively. Third, the accuracy of generalized indexes in detecting person (mis)fit is assessed through a simulation study. Three situations were investigated: (a) absence of misfit; (b) presence of cheating (yielding spuriously high scores); (c) presence of inattention (yielding spuriously low scores). Several conditions were varied, such as test length and aberrance rates when misfit was introduced. Response patterns were generated under the Rasch model and maximum likelihood estimation was performed to obtain the ability estimates. Several significance levels were selected. It is observed, that the generalized indexes Lz*, U* and W* better recover the significance level than their standard alternatives Lz, U and W respectively, while they are more powerful in identifying the two types of person misfit. In particular, the modified index W* has the best improvement in performance with respect to its original version W. It is concluded that Snijders' generalization of Lz index to Lz* is also accurate for U and W indexes under Rasch modelling. Possible extensions to other person fit indexes, such as ECI indexes (Tatsuoka, 1984), other ability estimators, and other IRT models are eventually briefly discussed. [less ▲]

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See detailTiO2 templated multilayer films used as high efficiency photoelectrode in liquid or solid DSSCs
Dewalque, Jennifer ULg; Cloots, Rudi ULg; Mathis, François ULg et al

Conference (2012, April 10)

Mesoporous anatase thin films are very promising materials to act as electrode in dye-sensitized solar cells. Randomly oriented nanocrystalline TiO2 particles are usually used to prepare photoelectrodes ... [more ▼]

Mesoporous anatase thin films are very promising materials to act as electrode in dye-sensitized solar cells. Randomly oriented nanocrystalline TiO2 particles are usually used to prepare photoelectrodes with a thickness of 10-15 µm. Templated-assisted dip-coating techniques are used to obtain thin films with ordered porosity. However, monolayer films prepared by dip-coating from a solution suffer from a low quantity of active material with a limited surface area, leading to poor photovoltaic performances. Therefore a multilayer deposition process is needed to increase the film thickness along with surface area. Multilayer dip-coating procedures have already been reported but are usually characterized by a lack of linearity in the evolution of parameters (roughness, surface area, PV performances) as the number of layer increases. In this study, we investigate a dip-coating-based multilayer deposition technique delaying these limitations. First, the influence of the template on the film organization and porosity is studied in terms of long-range order, percentage of porosity, pore size, surface area and pores connectivity. Different techniques such as transmission electron microscopy (TEM), atmospheric poroellipsometry (AEP) and UV-visible absorption spectroscopy (UV-vis.) have been used to describe the microstructural features of the films. The film exhibiting the highest dye loading was selected and its thickness gradually increased up to 4 µm. Finally, the photovoltaic performances of the thick films (1 to 4 µm) have been evaluated in combination with the N719 dye and a liquid electrolyte and show excellent efficiency (6.1%) when compared to values reported in the literature. Such mesostructured films were compared in terms of photovoltaic performance with TiO2 nanoparticles films, generally used in DSSC. Films were further evaluated by Rutherford Backscattering Spectrometry (RBS) as high performance photoelectrode in solid-state DSSCs, in combination with Z907 dye and Spiro-OMeTAD as solid electrolyte. [less ▲]

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See detailL'interprétation réaliste des jugements existentiels de Conrad-Martius
Seron, Denis ULg

Conference (2012, April 06)

Hedwig Conrad-Martius a développé, dans les années 1930, une conception en grande partie originale du jugement existentiel, dans la perspective d’une ontologie d’allure aristotélicienne. L’idée à la base ... [more ▼]

Hedwig Conrad-Martius a développé, dans les années 1930, une conception en grande partie originale du jugement existentiel, dans la perspective d’une ontologie d’allure aristotélicienne. L’idée à la base de cette conception est que l’être existentiel et l’être copule sont unis par une relation d’analogie, et que celle-ci doit servir de principe directeur pour la clarification des « sens de l’être ». Cette idée a conduit Conrad-Martius à élaborer une théorie assez sophistiquée de l’« être immanent à l‘état de choses », ainsi qu’une conception réaliste suivant laquelle le prédicat existentiel exprime une propriété de premier degré, qui doit être mise au jour par l’intuition des essences. On s’attachera non seulement à détailler son analyse du jugement existentiel, en remontant à ses sources chez Reinach, Pfänder et, indirectement, chez Meinong, mais aussi à en clarifier quelques implications métaphysiques. [less ▲]

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See detailRaymond De Becker et l'identité belge
Lanneau, Catherine ULg

Conference (2012, April 05)

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Peer Reviewed
See detailResidual Stress in Veneering Ceramic
MAINJOT, Amélie ULg

Conference (2012, April 04)

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See detailContribution of high mass resolution and accuracy of FTMS to molecular imaging
Debois, Delphine ULg; Calligaris, David ULg; Cimino, Jonathan ULg et al

Conference (2012, April 04)

Since its first implementation in 1997, MALDI Mass Spectrometry Imaging (MALDI MSI) has become an important tool in the proteomic arsenal, especially for biomarker hunting. First dedicated to high ... [more ▼]

Since its first implementation in 1997, MALDI Mass Spectrometry Imaging (MALDI MSI) has become an important tool in the proteomic arsenal, especially for biomarker hunting. First dedicated to high molecular weight, MALDI MSI is more and more used to map the distribution of small molecules too (lipids, drugs and metabolites,…). Last developments tend to improve the sample treatments to obtain the best spatial resolution as possible. From this perspective, great efforts have been made on the MALDI matrix deposition methods. Now, one of the remaining challenges for MALDI-MSI users consists of identification of detected molecules. For high molecular weight, methods inspired by classical proteomics techniques, are regularly used. Bottom-Up (PMF obtained after in situ trypsin digestion) and Top-Down (in situ In-Source Decay) approaches have been used directly from a tissue slice, leading to the identification of some of the most abundant proteins present at the surface of the tissue. When small molecules are analyzed, the identification is more straightforward. Indeed, tandem mass spectrometry can easily be used, leading to the fragmentation of the detected compounds which allows their unambiguous identification. This identification is even more reliable when high resolution exact mass measurements can be performed. In this talk, I will present how in our lab, we profit of the exceptional features of FT-ICR mass spectrometry for imaging and especially for identification purposes. The first example will deal with the benefit of high mass accuracy and high mass resolution for ISD-based protein identification. The mass accuracy and high mass resolution coupled with the use of a “cleaning” software allow unequivocal assignment of ISD fragments of proteins, in the low mass range (m/z between 300 and 900), whether from pure solutions or from tissue slices. The next examples will deal with the imaging of small molecules. The identification of drugs and their metabolites is facilitated with high mass accuracy. In our lab, we work on the localization of methadone and its first metabolite, EDDP in necrophagous fly larvae. In the mass range of these compounds (278-310 m/z), many matrix ion peaks are detected and the unique features of FT-ICR allows for unambiguous identification thanks to exact mass measurements. We also use MALDI Imaging to map the messenger molecules between plant roots and beneficial bacteria. The comparison of spectra recorded with a TOF/TOF instrument and with a FT-ICR demonstrates that high resolution allows for detecting molecules which could have been missed otherwise. It also allows to distinguish unknown compounds from alkali adducts of known molecules. [less ▲]

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See detailSurface water diffuse pollution by PPP: focus on runoff & erosion
Bah, Boubacar Billo ULg; Vandendael, Laurent; Oger, Robert ULg et al

Conference (2012, April 04)

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See detailVoir/savoir. Le partage du sensible
Havelange, Carl ULg

Conference (2012, April 04)

Detailed reference viewed: 45 (9 ULg)
See detailStochastic Dimension Reduction Techniques for Uncertainty Quantification of Multiphysics Systems
Phipps, Eric; Arnst, Maarten ULg; Constantine, Paul et al

Conference (2012, April 02)

Uncertainty quantification of multiphysics systems represents numerous mathematical and computational challenges. Indeed, uncertainties that arise in each physics in a fully coupled system must be ... [more ▼]

Uncertainty quantification of multiphysics systems represents numerous mathematical and computational challenges. Indeed, uncertainties that arise in each physics in a fully coupled system must be captured throughout the whole system, the so-called curse of dimensionality. We present techniques for mitigating the curse of dimensionality in network-coupled multiphysics systems by using the structure of the network to transform uncertainty representations as they pass between components. Examples from the simulation of nuclear power plants will be discussed. [less ▲]

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See detailQuels modes de gouvernance pour la PMI tunisienne? Les enseignements de la littérature
Ghorbel, Jihene ULg; Van Caillie, Didier ULg

Conference (2012, April 02)

Les Petites et Moyennes Entreprises (PME), et tout particulièrement les Petites et Moyennes Industries (PMI), constituent un des piliers de l’économie tunisienne. Néanmoins, malgré l’abondance des études ... [more ▼]

Les Petites et Moyennes Entreprises (PME), et tout particulièrement les Petites et Moyennes Industries (PMI), constituent un des piliers de l’économie tunisienne. Néanmoins, malgré l’abondance des études consacrées aux PME dans le monde, rares sont les recherches scientifiques qui portent sur les spécificités des PME industrielles dans ce contexte géographique donné. Simultanément, face au phénomène de mondialisation croissante de l'économie et aux crises économiques et financières qui marquent la vie économique mondiale en cette première décennie du nouveau millénaire, un consensus émerge dans la littérature conduisant au constat que les PME et les PMI doivent impérativement renforcer et améliorer à la fois leurs systèmes de contrôle et de gouvernance si elles veulent jouer un rôle majeur dans leur tissu économique respectif et si elles souhaitent consolider leur crédibilité auprès de l'ensemble de leurs partenaires externes (banquiers, Pouvoirs Publics, organes de contrôle externes, ...). Notre contribution se propose dès lors, à partir d’une analyse de la littérature relativement limitée spécifique à l'objet de recherche particulier que constitue la PMI tunisienne, de mettre en évidence les spécificités de la PMI tunisienne et ses conséquences sur le design d'un système de gouvernance qui permettrait d'asseoir leur crédibilité et donc leur assise dans le paysage économique tunisien. [less ▲]

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See detailSimuler la ressource forestière à l'échelle d'un massif : application de SIMMEM et GYMNOS
Ligot, Gauthier ULg; Vallet, Patrick; Perin, Jérôme ULg et al

Conference (2012, April 02)

Detailed reference viewed: 50 (16 ULg)
See detailDimension Reduction and Measure Transformation in Stochastic Multiphysics Modeling
Arnst, Maarten ULg; Ghanem, Roger; Phipps, Eric et al

Conference (2012, April 02)

We present a computational framework based on stochastic expansion methods for the efficient propagation of uncertainties through multiphysics models. The framework leverages an adaptation of the Karhunen ... [more ▼]

We present a computational framework based on stochastic expansion methods for the efficient propagation of uncertainties through multiphysics models. The framework leverages an adaptation of the Karhunen-Loeve decomposition to extract a low-dimensional representation of information passed from component to component in a stochastic coupled model. After a measure transformation, the reduced-dimensional interface thus created enables a more efficient solution in a reduced-dimensional space. We demonstrate the proposed approach on an illustration problem from nuclear engineering [less ▲]

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See detailTwo distinct origins of long-term learning effects in verbal short-term memory?
Majerus, Steve ULg; Oberauer, K.

Conference (2012, April)

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See detailAnticipatory Modeling and Simulation for Inter Regional Security
Dubois, Daniel ULg; Asproth, Viveca; Stig C, Holmberg et al

Conference (2012, April)

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See detailExperimental Results of Flat Fresnel Doublets made of PMMA and PC
Languy, Fabian ULg; Fleury-Frenette, Karl ULg; Lenaerts, Cedric ULg et al

Conference (2012, April)

To reduce the chromatic aberration lots of imaging systems like cameras and telescopes turn to achromatic doublets. On the other hand, to be cheaper, lighter and thinner, more and more systems like ... [more ▼]

To reduce the chromatic aberration lots of imaging systems like cameras and telescopes turn to achromatic doublets. On the other hand, to be cheaper, lighter and thinner, more and more systems like projectors and headlights use Fresnel lenses. To combine high performances and low cost, the use achromatic Fresnel doublets has been investigated. [less ▲]

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See detailHigher-Moment Risk Exposures in Hedge Funds
Lambert, Marie ULg; Hübner, Georges ULg; Papageorgiou, Nicolas

Conference (2012, April)

The paper singles out the key roles of US equity skewness and kurtosis in the determination of the market premia embedded in Hedge Fund returns. We propose a conditional higher-moment asset pricing model ... [more ▼]

The paper singles out the key roles of US equity skewness and kurtosis in the determination of the market premia embedded in Hedge Fund returns. We propose a conditional higher-moment asset pricing model with location, trading and higher-moment factors in order to describe the dynamics of the Equity Hedge (Market Neutral, Short Selling and Long/Short strategies), Event Driven, Relative Value, and Funds of Hedge Funds styles. The volatility, skewness and kurtosis implied in the US options markets are used by Hedge Fund managers as instruments to anticipate market movements. Managers should adjust their market exposure in response to variations in the implied higher moments. We show that higher-moment premia improve a conditional asset pricing model both in terms of explanatory power (R-squares and Schwarz criterion) and specification errors across all Hedge Fund styles. [less ▲]

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See detailCLUPI, a high-performance imaging system on the ESA-NASA rover of the 2018 ExoMars mission to discover biofabrics on Mars
Josset, Jean-Luc; Westall, Frances; Hofmann, B.A. et al

Conference (2012, April)

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See detailDo Identities Matter More than Party Interests in Ethno-Territorial Politics? Conceptual and Empirical Insights from Multilevel and Deeply Divided Belgium
Reuchamps, Min ULg; Dodeigne, Jérémy ULg; Sinardet, Dave

Conference (2012, April)

In territorial politics, identities are a chief variable of the political life. By definition, the ethno-linguistic identities play(ed) an important role in the political dynamics of several highly ... [more ▼]

In territorial politics, identities are a chief variable of the political life. By definition, the ethno-linguistic identities play(ed) an important role in the political dynamics of several highly divided societies. In most cases, the institutional design is in fact adapted or has been adapted to the ethno-linguistic divisions of the country. According to quite a few scholars, it is especially true for political elites who are not only shaped by this variable but also use this variable to legitimate their attitudes and actions. Therefore political elites of each ethno-linguistic group appeared to behave as monolithic blocks, standing against each other along ethno-linguistic lines. Nonetheless, this view neglects the role of party interests in explaining the behaviors of political elites. An important question for ethno-territorial politics should be raised: do identities matter more that party interests? The current reform of the – multilevel and deeply-divided – Belgian state provides a fertile ground to test this hypothesis. To what extent, party interests can account for political elites’ position in the debate about the 6th Belgian constitutional reform? To explore these questions, we surveyed every representative of Belgium’s seven legislative assemblies with a standardized questionnaire (Summer 2011). This research will help us apprehend the rationale behind political elites’ attitudes – be it identities, party interests or a mix of them – negotiating the new boundaries of the state and above all shed light on territorial politics in Europe. So doing, this paper aims at contributing to the debate that explores the possibility of a unified analytical approach bridging ethno-territorial politics and party politics. [less ▲]

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See detailBelgium’s political elites and the crisis
Dodeigne, Jérémy ULg; Sinardet, Dave; Reuchamps, Min ULg

Conference (2012, April)

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See detailEsthetic management : a team approach.
MAINJOT, Amélie ULg; LAMBERT, France ULg

Conference (2012, April)

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See detailThe earthquake sedimentary record in marine sediment from cores in the western part of the Marmara Sea, Turkey
Drab, Laureen; Hubert, Aurelia ULg; Schmidt, Sabine et al

Conference (2012, April)

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See detailHow does elicitor and antimicrobial fengycin interact with plasma membranes of sensitive cells ?
Nasir, Mehmet Nail ULg; Eeman, Marc; Lins, Laurence ULg et al

Conference (2012, April)

Fengycin is characterized by its strong antifungal and low hemolytic activities. It has also been recently demonstrated that it has plant elicitor properties and is also able to enhance the elicitors’ ... [more ▼]

Fengycin is characterized by its strong antifungal and low hemolytic activities. It has also been recently demonstrated that it has plant elicitor properties and is also able to enhance the elicitors’ activity of surfactin. The cell target of its biological activities is supposed to be plasma membrane. In spite of these interesting biological activities, fengycin has not been extensively investigated probably because of the difficulties related to its production. In a first time; we have characterized the interfacial properties of fengycin by tensiometry measurements and demonstrated that this surface activity was pH-dependent. In a second time; we have investigated the interactions of the lipopeptide with membrane lipids using model membranes such as Langmuir monolayers and multilammelar vesicles (MLVs). Our results indicate that the lipopeptide was able to penetrate into different lipid monolayers showing a preference for sterol-containing monolayers. In order to better understand the mechanism of the interactions of fengycin with membranes at the molecular level, MLVs with or without fengycin have been analyzed by spectroscopic techniques. We have shown that conformational changes of the lipopeptide occurred in the presence of lipids and they were more significant in the presence of sterol. Moreover, tyrosine residues of the lipopeptide seem to play an important role in these interactions. In conclusion, we have determined that the surface-active behavior as well as the conformation of fengycin depends on its environment. We have also showed that the lipopeptide does not interact with all class of lipids in the same way and presents a preference for sterols. The presence of key groups within peptide cycle has also been supposed for the biological activities of the lipopeptide. [less ▲]

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See detailLa globalisation : cinq thèses et trois scénarios
Jacquemain, Marc ULg

Conference (2012, April)

La communication reprend l'idée de Zaki Laïdi, selon laquelle au-delà de l'accélération des flux économiques, la globalisation doit être considérée comme un transformation des représentations du monde. Il ... [more ▼]

La communication reprend l'idée de Zaki Laïdi, selon laquelle au-delà de l'accélération des flux économiques, la globalisation doit être considérée comme un transformation des représentations du monde. Il propos d'apppliquer cette logique à quelques grands travaux sociologiques récents sur la globalisation et montrer comment ces travaux eux-mêmes contribuent à faconner des "imaginaires" au sens de Zaki Laïdi [less ▲]

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See detailThe optimization of microsatellite genotyping and genetic sexing of non-invasively collected polar bear tissue: Implications for monitoring and census.
Harris, Christopher; Van Coeverden De Groot, Peter; Kamookak, L et al

Conference (2012, April)

The monitoring of Polar Bears in Canada has been completed largely through management unit (MU) wide capture-mark-recapture (CMR) surveys. While this data is very useful at the time of collection, these ... [more ▼]

The monitoring of Polar Bears in Canada has been completed largely through management unit (MU) wide capture-mark-recapture (CMR) surveys. While this data is very useful at the time of collection, these surveys are expensive and take time to plan and execute; cannot be feasibly executed across the polar bear range at intervals that reflect the expected rapid environmental changes in the Arctic; and are disdained by the Inuit as being invasive. As part of recent efforts to explore less expensive and non-invasive methods to monitor polar bears (see Wong et al & Van Coevderden de Groot et al this conference) we are evaluating genetic information obtained from non-invasively collected polar bear tissue. In this work we report on the genetic data obtained from non-invasively collected harisnags recovered from sampling stations erected between May-June 2006-2009 in M’Clintock Channel, Nunavut. Across the 4 years 344 hair snags were collected; following Paetkau (2004) we optimized 6 microsatellite loci to reliably amplify polar bear DNA from this tissue and we modified the procedure of Pages et al (2009) to reliably genetically sex these tissues. Our estimates for two common errors with this type of tissue across all loci – allelic dropout (0.026) and false allele (0.03) - were both less than p =.05. This suggests these errors are not going to significantly affect the accuracy of the consensus genotypes collected from these data. Using consensus genotypes from relevant hairsnags, we posit a minimum of 59 (max 82) unique bears entered our sampling stations. Of these, 24% were female, 64% were male, and 12% could not be sexed. We resampled 2 bears in 2006, 1 in 2007, 0 bears in 2008 and 14 bears in 2009 – the 2009 value reflects significantly increased sampling effort in 2009. Five bears were re-sampled between the non-invasive surveys in 2006-2009. When comparing our data to a subset of cubs and subadults captured during the Taylor et al. (2006) CMR survey of M’Clintock Channel (MU), we found 6 genotype matches. Our sampling stations may have a male bias as the sex ratio from the 1998-2000 CMR study was 42.1% ♂ (Taylor et al 2006) vs. 64% ♂ (this study). We cannot accurately determine the age bias (but see Wong et al this conference). Genetic data from Polar bear faecal samples may provide an unbiased sex and age sample of polar bears in any MU. Any data from these samples will help refine hairsnag derived MKNA estimate of polar bears from any MU. Here we report on our efforts to genotype and genetically sex 95 faecals we have collected from M’Clintock Channel from 2006-2009. Finally, we discuss the implications of these findings, results from other noninvasive work (Wong et al & Van Coevderden de Groot et al this conference) and ongoing/proposed work in the context of i) a non-invasive Inuit-based polar bear activity and health survey, and ii) a more rigorous census method which may allow more precise adjustments of harvest levels than currently possible using infrequently collected CMR data only. [less ▲]

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See detailThe oxygen nightglow emissions of Venus: vertical distribution and role of collisional quenching
Gérard, Jean-Claude ULg; Soret, Lauriane ULg; Migliorini, Alessandra et al

Conference (2012, April)

The oxygen nightglow emissions of Venus: vertical distribution and role of collisional quenching J.-C. Gérard (1), L. Soret (1), A. Migliorini (2), G. Piccioni (2), and P. Drossart (3) (1) LPAP ... [more ▼]

The oxygen nightglow emissions of Venus: vertical distribution and role of collisional quenching J.-C. Gérard (1), L. Soret (1), A. Migliorini (2), G. Piccioni (2), and P. Drossart (3) (1) LPAP - Université de Liège - Belgium (jc.gerard@ulg.ac.be, 0032 4 366 9711), (2) INAF - Rome, Italy, (3) LESIA, Observatoire de Paris - Meudon, France Three-body recombination of atomic oxygen produces O2 molecules excited in different electronic states such as a 1∆g, b 1 􏰀+g , A 3 􏰀+u , c 1 􏰀uand A’ 3∆u, each with a specific quantum efficiency. When they radiate, optical transitions are observed in a wide range of wavelengths extending from the ultraviolet to the near infrared. In planetary atmospheres, spontaneous radiative deexcitation compete with collisional quenching with ambient molecules and atoms. As a consequence, the corresponding airglow emission profiles may significantly differ from each other in brightness and altitude of the emitting layer. We model the volume emission rates and limb profiles of the O2 Atmospheric Infrared (a 1∆-X 3 􏰀), Herzberg I (A 3 􏰀-X 3 􏰀), Herzberg II (c 1 􏰀-X 3 􏰀), Chamberlain (A’ 3∆-a 1∆) bands expected on the Venus night side. The quenching rates are taken from laboratory and observational planetary data and we apply two different methods to determine the oxygen and CO2 density profiles. One is based on recent analysis of data collected by instruments on board the Venus Express mission. The second one uses a one-dimensional chemical-diffusive model where the free parameters are the strength of turbulent transport and the downward flux of O atoms. Both approaches indicate that the calculated intensities of each transition range over several orders of magnitude and that differences are expected in the altitude of the maximum emission. These predictions will be compared with VIRTIS/Venus Express limb observations, which make it possible to derive the vertical distribution of the O2 emissions in the visible and infrared. These measurements suggest that no difference is observed between the altitude of the peak of the IR Atmospheric and Herzberg II bands. Conclusions will be drawn about the validity of the current set of quenching coefficients used in the model. [less ▲]

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See detailEarly Jezirah 3b Pottery from Tell Beydar. Selected Inventories from latest excavation campaigns
Mas, Juliette ULg; Gavagnin, Katia

Conference (2012, April)

Since 1992, excavations at Tell Beydar have offered the opportunity to explore an urban centre of the Upper Khabur region. The extensive exploration of the EJZ 3b levels gave us access to the urbanism and ... [more ▼]

Since 1992, excavations at Tell Beydar have offered the opportunity to explore an urban centre of the Upper Khabur region. The extensive exploration of the EJZ 3b levels gave us access to the urbanism and the architecture of the city as well as its material culture, especially the pottery. The assemblages presented in this paper were exclusively found directly on the floors of various buildings (of a public, domestic, religious, offi- cial nature) and inside a grave. Most of these inventories consist of complete vessels discovered either intact or smashed but restorable. The aim of this paper is to investigate if, or to what extent, the intra-site distribution of the morphological repertoire of Beydar IIIb ceramic is related to its context of use. [less ▲]

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See detailModelling autotrophic and heterotrophic components of soil respiration in wheat fields
Delogu, Emilie; LeDantec, Valérie; Buysse, Pauline ULg et al

Conference (2012, April)

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See detailNon invasive sleep monitoring
Deliège, Benjamin; Coppieters't Wallant, Dorothe ULg

Conference (2012, April)

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See detailEvaluating COSMO’s lake module (FLake) for an East-African lake using a comprehensive set of lake temperature profiles
Thiery, Wim; Martynov, Andrey; Darchambeau, François ULg et al

Conference (2012, April)

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See detailModelling the risk of ecosystem disruption in Europe with a dynamic vegetation model
Dury, Marie ULg; Hambuckers, Alain ULg; Warnant, Pierre et al

Conference (2012, April)

What will be the European ecosystem responses to future climate? With unprecedented speed and extent, the projected climate change might lead to a disruption of terrestrial plants functioning in many ... [more ▼]

What will be the European ecosystem responses to future climate? With unprecedented speed and extent, the projected climate change might lead to a disruption of terrestrial plants functioning in many regions. In the framework of the EcoChange project, transient projections over the 1901-2100 period have been performed with a process-based dynamic vegetation model, CARAIB DVM (Dury et al., 2011, iForest 4: 82, 99). The vegetation model was driven by the outputs of four climate models under the SRES A1B scenario: the ARPEGE/Climate model and three regional climate models (KNMI-RACMO2 , DMI-HIRHAM5 and HC-HadRM3Q0 RCMs) from the European Union project ENSEMBLES. DVMs are appropriate tools to apprehend potential climate change impacts on ecosystems and identify threatened regions over Europe. CARAIB outputs (soil moisture, runoff, net primary productivity, fire, etc.) were used to characterize the ecosystem evolution. To assess consequences on biodiversity, the evolution of 100 natural common European species (47 herbs, 12 shrubs and 41 trees) has been studied year-to-year over the 1901-2100 period. Under the combined effects of projected changes particularly in temperature and precipitations, CARAIB simulates important reductions in the annual soil water content. The species productivities vary strongly from year to year reaching during the driest years values much lower than present-day average productivity. According to CARAIB, a lot of species might go beyond their water tolerance very frequently, particularly after 2050, due to more intense summer droughts. In the northern part of Europe and in the Alps, with reduced temperature variability and positive soil water anomalies, NPP variability tends to decrease. Regions with more severe droughts might also be affected by an increase of the frequency and intensity of wildfires. With this background, the species distributions might be strongly modified. 15% of tree species and 30% of herb and shrub species (respectively 30% and 60% if the CO2 fertilization effect on species is not taken into account) might experience a loss of 30% or more of their current distribution. Proportions of new species appearance at the end of the century were also studied. Southern Europe might suffer important species extinction while the more suitable climate conditions in northern Europe might lead to a gain in species diversity. [less ▲]

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See detailHow convection and diffusion processes might affect biological imprints, a challenge for modelers
Tison, J.-L.; Zhou, Jiayun ULg; Thomas, D. et al

Conference (2012, April)

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See detailLight as a modulator of cognitive brain functions
Vandewalle, Gilles ULg

Conference (2012, April)

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See detailChargement de marchandises dans un avion cargo: le cas des marchandises nécessitant des précautions particulières
Schyns, Michael ULg; Limbourg, Sabine ULg; Kleyntssens, Thomas ULg

Conference (2012, April)

D'une part, les entreprises de transport aérien ont acheminé en 2010 plus d’un tiers de la valeur des exportations mondiales. D'autre part, le chargement des avions est une opération complexe soumise à de ... [more ▼]

D'une part, les entreprises de transport aérien ont acheminé en 2010 plus d’un tiers de la valeur des exportations mondiales. D'autre part, le chargement des avions est une opération complexe soumise à de nombreuses contraintes et peu d'outils sont disponibles pour aider les loadmasters à trouver la meilleure disposition des conteneurs dans les avions. Limbourg, Schyns et Laporte (2011) ont proposé un modèle à variables entières pour traiter les problèmes élémentaires. Notre travail est une extension de ces travaux. Nous considérons des chargements spéciaux qui impliquent des précautions particulières (produits dangereux, animaux, produits réfrigérés, aliments périssables, ...) ainsi que le transport de marchandises de plus grande taille. L’ajout de ces deux types de contraintes se justifie par la grande fréquence de ces situations dans des problèmes réels rencontrés par nos partenaires industriels. Le problème résultant est très complexe et nous proposons un outil pour le résoudre. [less ▲]

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See detailLe statut du “logos” dans Être et temps.
Gauvry, Charlotte ULg

Conference (2012, April)

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See detailIntentionnalité de se
Dewalque, Arnaud ULg

Conference (2012, March 30)

Le programme philosophique de Chisholm prétend constituer une alternative au programme mis en œuvre par Quine dans "Word and Object" (1960). Son ambition est de rendre compte de notre capacité à nous ... [more ▼]

Le programme philosophique de Chisholm prétend constituer une alternative au programme mis en œuvre par Quine dans "Word and Object" (1960). Son ambition est de rendre compte de notre capacité à nous référer à des objets, non pas à partir d’un cadre prioritairement sémantico-linguistique (comme le fait Quine), mais à partir de ce que l’on appelle communément les « attitudes intentionnelles », telles que croire, désirer, espérer, etc. Chisholm défend ainsi ce qu’il appelle la « primauté de l’intentionnel », ce qui signifie en fait la primauté du point de vue mental sur le point de vue linguistique . Dans "The First Person" (1981), Chisholm développe une deuxième thèse bien plus ambitieuse et bien plus problématique: il soutient que toute référence mentale à un objet doit être construite comme une auto-référence, une référence à soi-même (thèse de la « primauté du personnel »). Je retrace ici la provenance brentanienne de cette thèse et je présente quelque difficultés de l'argumentation de Chisholm. [less ▲]

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See detailDivergences morphologiques et génétiques chez une espèce de demoiselle (Pomacentridae): Pomacentrus coelestis
Frederich, Bruno ULg; Liu, Shang-Yin

Conference (2012, March 30)

La différentiation des populations est l’un des principaux thèmes de la biologie de l’évolution. Mise à part l’étude des variations des patrons de coloration, très peu d’études concernent les divergences ... [more ▼]

La différentiation des populations est l’un des principaux thèmes de la biologie de l’évolution. Mise à part l’étude des variations des patrons de coloration, très peu d’études concernent les divergences morphologiques entre les populations de poissons des récifs coralliens. Dans ce travail, nous avons étudié la différentiation morphologique et génétique entre plusieurs populations de l’espèce de demoiselle, Pomacentrus coelestis Jordan & Starks, 1901, dans le Nord-Ouest de l’océan Pacifique. Cette espèce, inféodée aux récifs coralliens, se nourrit principalement de zooplancton. Elle est particulièrement abondante dans cette région du monde. Les formes des mâchoires buccales (c’est-à-dire la mandibule et le prémaxillaire) ont été étudiées au moyen des méthodes de morphométrie géométrique et la structure génétique des populations a été caractérisée au moyen de cinq microsattelites (POM3, POM2, AC1578, Pom2269 et Pom2416). Différents tests statistiques ont révélé une variation significative de forme entre les populations de P. coelestis pour chacune des deux pièces squelettiques. Les variations de forme de la mandibule et du prémaxillaire apparaissent non-corrélées. Les variations morphologiques de la mandibule accompagne une rupture génétique entre des populations de l’île principale du Japon et les îles d’Okinawa et Taiwan. Cependant, les tests de Mantel et Procrustes n’ont révélé aucune congruence entre les structures génétiques et morphologiques. Des variables géographiques telles que la latitude, la longitude et les distances kilométriques expliquent peu ou pas les variances morphologiques observées. Dans notre discussion, nous illustrons que la plasticité phénotypique serait un mécanisme évolutif potentiel sous-jacent à la différence de formes entre les populations de P. coelestis. Cependant l’hypothèse d’une divergence adaptative ne pourrait cependant pas être exclue vu que nous avons uniquement étudié des marqueurs génétiques neutres (microsattelites). Une approche écomorphologique suggère que des régimes alimentaires différents pourraient être liés aux variations de forme des mâchoires buccales. A titre d’exemple, les individus des populations de l’île principale du Japon ont des mandibules plus massives suggérant des activités de broutage et/ou de morsure plus fréquentes. Inversément, les individus de Taiwan et d’Okinawa arborent un processus ascendant du prémaxillaire proportionellement plus long que les poissons des autres populations. Cette caractéristique, directement liée à l’efficacité de protrusion des mâchoires supérieures, confirmerait un degré de zooplanctonophagie plus élevé chez ces deux populations. [less ▲]

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See detailGlobal imbalances, Exchange Rates and Economic Growth
Artige, Lionel ULg; Cavenaile, Laurent

Conference (2012, March 29)

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See detailDelayed graft function does not harm the future of donation-after- cardiac-death kidney transplants
LeDinh, H; WEEKERS, Laurent ULg; BONVOISIN, Catherine ULg et al

Conference (2012, March 29)

Introduction: Delayed graft function (DGF) occurs more frequently in kidney transplants from donation after cardiac death (DCD) than from donation after brain death (DBD). We investigated the effect of ... [more ▼]

Introduction: Delayed graft function (DGF) occurs more frequently in kidney transplants from donation after cardiac death (DCD) than from donation after brain death (DBD). We investigated the effect of DGF on post-transplant outcomes in controlled DCD kidney grafts. Patients and Methods: This single-center retrospective study recruited 80 controlled DCD kidney allo- grafts which have been performed at the University Hospital of Sart Tilman, University of Liège, from Jan 2005 to Dec 2011. Results: Mean patient follow-up was 28.5 months. No primary non-function grafts were encountered. DGF rate was 36%. Overall graft survivals between groups with and without DGF were 92.4% and 95.1% at 1 year, 92.4% and 91.7% at 3 years, and 84.7% and 91.7% at 5 years (p=ns), respectively. Patients with and without DGF had the same survival rates at the corresponding time points (92.4% and 97.1%, 92.4% and 93.7%, and 84.7% and 93.7%, p=ns, respectively). Estimated glomerular filtration rate (eGFR) was significantly lower in DGF group compared to non-DGF group at hospital discharge (29 vs 42 ml/min, p=0.001) and up to 1 year post-transplant (46 vs 53 ml/min, p=0.045), but the differ- ence disappeared afterwards (50 vs 48 ml/min at 3 years, and 54 vs 53 ml/min at 5 years, p=ns). DGF did not increase the risk of acute rejection or surgical complications. 29.6% of recipients with DGF de- veloped acute rejection (biopsy-proven rejection and clinically suspected rejection) compared with 29.2% of recipients without DGF (p=ns). The rate of all surgical complications was 33.3% and 25% in recipients with and without DGF (p=ns). However, DGF prolonged significantly the length of hospitaliza- tion in DGF than non-DGF group (18.9 vs 13 days, p=0.000). Donor BMI 􏰤 30 kg/m2􏰁􏰀􏰚􏰌􏰈􏰏􏰥􏰏􏰌􏰝􏰣􏰀􏰕􏰉􏰂􏰀􏰤 30 kg/m2 and pre-transplant dialysis duration increased the risk of DGF in a multivariate logistic regression analysis. Conclusions: Apart from longer hospital stay, DGF had no deleterious impact on the future of DCD kidney allografts. Comparable graft and patient survival, renal function, rejection rate and surgical com- plications were observed between groups with and without DGF. [less ▲]

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See detailLa transgression de la norme dans la religion grecque antique : le cas de l'impiété (asebeia)
Delli Pizzi, Aurian ULg

Conference (2012, March 29)

Présentation diachronique du concept d'impiété dans la religion grecque antique

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See detailNeuromorphic reinforcement learning
Dethier, Julie ULg; Ernst, Damien; Sepulchre, Rodolphe

Conference (2012, March 29)

Living organisms are able to successfully perform challeng- ing tasks such as perception, classification, association, and control. In hope for similar successes in artificial systems, neuromorphic ... [more ▼]

Living organisms are able to successfully perform challeng- ing tasks such as perception, classification, association, and control. In hope for similar successes in artificial systems, neuromorphic engineering uses neurophysiological models of perception and information processing in biological sys- tems to emulate their functions but also resemble their struc- ture [1]. In this abstract, we focus on the basal ganglia (BG), brain region in control of primitive functions of the nervous system, and specifically on their involvement in action selec- tion and reinforcement learning (RL). We hypothesize that neuromorphic-inspired systems will greatly benefit the RL community. [less ▲]

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See detailConclusions générales et perspectives
Seron, Vincent ULg

Conference (2012, March 29)

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See detailDo common principles underlie the representation of order in STM and numerical judgment tasks?
Attout, Lucie ULg; Majerus, Steve ULg

Conference (2012, March 29)

Although many studies have explored magnitude effects in numerical cognition, the representation of order information has received only limited interest. We explored the hypothesis that common abstract ... [more ▼]

Although many studies have explored magnitude effects in numerical cognition, the representation of order information has received only limited interest. We explored the hypothesis that common abstract ordinal representations underlie the representation of order information across different domains. We tested this hypothesis by determining the similarity of distance effects in short-term memory (STM) order probe recognition (did ‘8’ occur before ‘5’ in the list ‘3, 6, 5, 4, 8, 7’ presented a few seconds ago?) and in order judgment tasks (does ‘1’ occur before ‘2’), both numerical and alphabetical stimuli were used. In numerical cognition, adjacent numbers are typically judged more slowly than more distant numbers. In fifty healthy adults, we observed significant distance effects across all tasks: in the order judgment tasks, adjacent numbers/letters were judged more slowly than more distant numbers/letters; in the STM tasks, order recognition was slowed for stimuli stemming from adjacent positions in the STM list as compared to stimuli stemming from more distant positions. Regression slopes for distance effects were identical across the different tasks and conditions. Furthermore, the size of distance effects correlated significantly across tasks, except for the order judgment task with numerical stimuli. We will discuss the implications of these results for a hypothetical common representational system of order information in STM and numerical cognition. [less ▲]

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See detailStriptease em raio-x: algumas interrelações artístico-científicas no domínio visual.
Sturnack, Lionel ULg

Conference (2012, March 28)

O striptease que propomos analisar é na verdade o título de uma obra que pertence à produção da artista italiana Benedetta Bonichi. Trata-se de uma composição mista, a meio caminho entre os raios-x e a ... [more ▼]

O striptease que propomos analisar é na verdade o título de uma obra que pertence à produção da artista italiana Benedetta Bonichi. Trata-se de uma composição mista, a meio caminho entre os raios-x e a fotografia. “Striptease” constitui uma base analítica interessante para várias razões. Com certeza, por seu caráter surpreendente, sendo uma cena erótica e ao mesmo tempo uma radiografia. Mas também e sobretudo por sua estética particular em relação aos outros artistas que desenvolvem uma técnica similar. Uma parte do nosso estudo consistirá na abordagem indispensável mesmo que breve das realizações de quatro outros artistas que trabalham com os raios-x. O propósito de nossos passos é levar em consideração o lugar da obra estudada no espaço de realizações em raio-x artístico, numa perspectiva semiótica. Pretendemos desta maneira chegar à descrição fina de “Striptease”, ou seja, conseguir por um lado estabelecer os critérios sobre os quais se correlacionam e se diferenciam os raios-x artísticos vistos e, por outro lado e graças à primeira etapa, dar conta da riqueza da obra da italiana. Desenvolveremos o estudo segundo três etapas gerais. Com a primeira, efetuaremos uma descrição de “Striptease” segundo os três eixos da leitura plástica padrão, tal como foram trabalhados por Jean-Marie Floch: cromático, eidético e topológico. Na segunda etapa, adotaremos o mesmo ponto de vista para a descrição plástica de cinco obras de quatro outros artistas: Nick Veasey, a agência Butter, Wim Delvoye e Claudio Mubarac. O interesse da segunda parte consiste em mostrar que o tipo de descrição estabelecido para “Striptease” vale nos outros casos e como se atualizam as unidades plásticas em cada realização particular, a fim de observar as suas possíveis convergências. Na última etapa, poderemos considerar a estética de cada obra à luz das atualizações plásticas e das integrações entre elas com outros patamares temáticos. Conseguiremos, finalmente, entender a pertinência e a particularidade de “Striptease” como metalinguagem crítica por meio destas considerações temáticas e plásticas. [less ▲]

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See detailMercury in blood of free-ranging seals Phoca vitulina from the North Sea: Time-trend and association with environmental factors
Das, Krishna ULg; Brochoire, Charlène ULg; Chambosse, Mélanie et al

Conference (2012, March 27)

The harbour seal (Phoca vitulina) population from the North Sea has experienced various fluctuations these last decades due to habitat loss, prey fluctuation and pollution of the marine environment ... [more ▼]

The harbour seal (Phoca vitulina) population from the North Sea has experienced various fluctuations these last decades due to habitat loss, prey fluctuation and pollution of the marine environment. Recently, development of monitoring programs and non-invasive sampling techniques, including seal catches allowed blood sampling on a regular basis together with measurements of blubber thickness, body mass, sex and body length. Concentrations of total mercury (T-Hg) and other trace elements (Cd, Pb, Zn, Cu, Fe) as well as ∂13C and ∂15N values were determined by mass spectrometry in blood of 75 wild harbour seals caught in the German Wadden Sea between 1997 and 2011. ∂13C and ∂15N mean values (-17.5‰ and 18.1 ‰ respectively) were strongly similar to that measured previously in the muscle of stranded harbour seals from the Wadden Sea. In contrast, ∂15N mean value was strikingly higher than that recorded in grey seals (Halichoerus grypus) from Scotland (14.1 ‰ respectively; Habran et al. submitted.) while ∂13C values remained similar between the two seal species. These values confirmed the high trophic position of the harbour seal in the North Sea. In contrast to Cd and Pb, T-Hg in blood harbour seals reached concentrations as high as 2.1 μg.g-1 dry weight (10 times higher than the 0.21 μg.g-1 dry weight recorded for grey seals from Scotland) but depended on several factors including ∂15N values, age group and the body mass. T-Hg was detected in juveniles confirming maternal transfer to offspring and time-trend revealed no decrease of T-Hg in blood of harbour seals these last 15 years. [less ▲]

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See detailIntraocular Lenses with Functionalized Surfaces by Biomolecules in Relation with Lens Epithelial Cell Adhesion
Huang, Yi-Shiang ULg

Conference (2012, March 27)

A cataract is pathology opacity of the lens or capsule of the eye, causing impairment of vision or even blindness. In 1998, it was estimated that worldwide 19.4 million people were bilaterally blind from ... [more ▼]

A cataract is pathology opacity of the lens or capsule of the eye, causing impairment of vision or even blindness. In 1998, it was estimated that worldwide 19.4 million people were bilaterally blind from age-related cataract. Surgery, with lens extraction and intraocular lens implantation, is still the only currently available treatment. More than 1.3 million cataract operations were performed in the USA in 1998 at a cost of $3.5 billion. The most common complication after implantation of intraocular lenses (IOLs) is the posterior capsular opacification (PCO) or secondary cataract. This is the result of lens epithelial cells (LECs) proliferation and their transition to mesenchymal cells. In 1997, a Sandwich theory was proposed to elucidate the developmental process of PCO. According to this model, an IOL with higher affinity to LECs will induce a less PCO. In our research, the pHEMA (Poly(2-hydroxyethyl methacrylate)) based acrylic hydrophilic polymer is subjected to the surface modification by conjugating with the bioactive peptides. The RGD sequence, known for its excellent biocompatibility, is designed to stimulate the biointegration between the LECs and the polymer implant. Our research program will focus on the evaluation of the physical, mechanical and biological properties of the lens before and after peptide grafting. These diverse tests include contact angle measurements, Atomic Force Microscopy (AFM), x-ray photoelectron spectroscopy (XPS), FTIR/ATR, Scanning Electron Microscopy (SEM), and the MTS cytotoxicity assay. [less ▲]

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See detailEverybody knows what IRT is... (really?)
Magis, David ULg

Conference (2012, March 27)

Item response theory (IRT) is not only a famous acronym, it also covers a broad range of statistical and psychometric models, methods, and applications in psychology and educational science. However, IRT ... [more ▼]

Item response theory (IRT) is not only a famous acronym, it also covers a broad range of statistical and psychometric models, methods, and applications in psychology and educational science. However, IRT looks somewhat misunderstood or even esoteric to the non-statisticians and non-psychometricians. The main goal of this talk is to briefly and clearly present the main aspects of traditional IRT: objectives, assumptions, basic models, and basic estimation methods. As a secondary purpose, extensions of IRT to more complex situations (polytomous data, multidimensional and hierarchical models, computerized adaptive testing, differential item functioning, nonparametric IRT) are briefly outlined. This talk will be as little technical as possible, focusing on the main concepts and applications of this theory. [less ▲]

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See detailPreparation of drug-loaded scaffolds for biomedical applications using supercritical carbon dioxide technology
Champeau, Mathilde; Jérôme, Christine ULg; Tassaing, Thierry

Conference (2012, March 25)

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See detailRelationships between structure-interfacial-functional properties: The rheology at interfaces from small to polymeric carbohydrate-based surfactants
Razafindralambo, Hary ULg

Conference (2012, March 25)

Amphiphilc molecules are one of the most important compounds in our planet owing to their fundamental role as catalysts of interfacial free energy in nature, biological systems, and manufacturated ... [more ▼]

Amphiphilc molecules are one of the most important compounds in our planet owing to their fundamental role as catalysts of interfacial free energy in nature, biological systems, and manufacturated products [1]. Their chemical structure and configuration, which governs their properties and activities, may be classified in small, intermediate, and large sizes. To better understand the effect of such a parameter, the behaviors of various carbohydrate-based surfactants, from small to polymeric molecular structures at the air-water interface, and in bulk liquid for their ability to form and stabilize related colloidal systems like micelles and foams have been investigated. In particular, rheological properties including elasticity and viscosity components at the air-water interface have been determined by oscillatiory mode under different oscillation frequency and surfactant concentration conditions using a pending drop tensiometer system. Their micellar and foaming properties have been characterized and evaluated in terms of CMC-micelle size and formation-stability, respectively. Reference: [1] Razafindralambo, H.; Blecker, C.; Paquot, M., Screening of Basic Properties of Amphiphilic Molecular Structures for Colloidal System Formation and Stability. In Amphiphiles: Molecular Assembly and Applications, Ed. R. Nagarajan, American Chemical Society: 2011;. Vol. 1070, pp 53-66. [less ▲]

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