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See detailProtection effects or natural variability? The case of seagrass amphipods
Sturaro, Nicolas ULg; Lepoint, Gilles ULg; Pérez-Perera, Amanda et al

Conference (2013, October)

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See detailAdvances in the hunt for cadaveric decomposition VOC profiling
Stefanuto, Pierre-Hugues ULg; Stadler, S; Pesesse, R et al

Conference (2013, October)

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See detailSuivis hydromorphologiques et écologiques dans le cadre du projet Walphy
Verniers, Gisèle; Peeters, Alexandre ULg; De le Court, Bernard

Conference (2013, October)

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See detailEtude de la conduction nerveuse motrice et sensitive aux membres supérieurs et inférieurs
WANG, François-Charles ULg; LEJEUNE, Thierry

Conference (2013, October)

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See detailBiodiversité et observation participative en ligne : modèle et enjeux de la plateforme Observations.be
Farah, Jihad ULg

Conference (2013, October)

Dans cette intervention, nous posons la question de la métamorphose des rapports entre citoyens et institutions suite au développement des NTIC, à travers l’exemple de la plateforme d’observation de la ... [more ▼]

Dans cette intervention, nous posons la question de la métamorphose des rapports entre citoyens et institutions suite au développement des NTIC, à travers l’exemple de la plateforme d’observation de la biodiversité Observations.be et de l’Institut Bruxellois de Gestion de l’Environnement à Bruxelles (IBGE). Nous nous intéressons surtout à voir si, comme le signale Charvolin (2009), une meilleure maîtrise des pratiques de la recherche – dans notre cas à travers les NTIC – peut réellement mettre à pied d’égalité amateur et expert. Nos réflexions ici s’appuient sur des entretiens, notamment auprès des gestionnaires du dossier biodiversité à l’IBGE et des administrateurs d’Observations.be, ainsi que sur l’analyse des fonctionnalités du site lui-même. [less ▲]

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See detailModeling post-combustion CO2 capture with assessment of solvent degradation
Léonard, Grégoire ULg; Belletante, Ségolène; Cabeza Mogador, Bruno et al

Conference (2013, October)

Post-combustion CO2 capture in power plants is one of the most mature technologies for a short-term and large-scale decrease of CO2 emissions while simultaneously addressing the growing global energy ... [more ▼]

Post-combustion CO2 capture in power plants is one of the most mature technologies for a short-term and large-scale decrease of CO2 emissions while simultaneously addressing the growing global energy demand. CO2 is chemically absorbed in an amine solvent that can be regenerated at higher temperature, producing a pure CO2 stream. However, the large impact of this technology on the power plant efficiency and the environmental penalty are the main drawbacks for large-scale implementation. In this work, an innovative approach combining process modeling and evaluation of the environmental penalty due to amine degradation is presented. Based on experimental results, the kinetics of solvent oxidative and thermal degradation is estimated and included in the process model developed in Aspen Plus. Using this model, the influence of operating parameters like the oxygen concentration in the flue gas or the solvent regeneration pressure is studied. This model is a first step for a multi-objective optimization of the CO2 capture process, assessing both energy and environmental penalties of this technology. [less ▲]

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See detailMinimishing the nutritional deficit in ill preterm infants
SENTERRE, Thibault ULg

Conference (2013, October)

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See detailSeals as sentinel species for the marine environment
Das, Krishna ULg

Conference (2013, October)

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See detailIntroduction et conclusion
Dozo, Björn-Olav ULg; Preyat, Fabrice; Tilleuil, Jean-Louis

Conference (2013, October)

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See detailCassini UVIS Saturn Auroral Images from the 2013 HST/Cassini Campaign
Pryor, Wayne; Jouchoux, Alain; Esposito, Larry et al

Conference (2013, October)

In 2013 coordinated observations of Saturn by the Cassini spacecraft and Hubble Space Telescope (HST) were obtained. During these observations the Cassini spacecraft provided a high-latitude view of ... [more ▼]

In 2013 coordinated observations of Saturn by the Cassini spacecraft and Hubble Space Telescope (HST) were obtained. During these observations the Cassini spacecraft provided a high-latitude view of Saturn's auroras. Intense auroras were observed by the Ultraviolet Imaging Spectrograph (UVIS) from close range (about 5 Saturn radii away). A 6-frame UVIS movie has been constructed from some of the observations from May 20- 21, 2013 showing the evolution of two bright auroral features. We report on the UVIS images, the corresponding spectra, and compare the UVIS data to HST images and data from other Cassini instruments. [less ▲]

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See detailThe extinction of ichthyosaurs is a facet of a major Cenomanian turnover in marine ecosystems
Fischer, Valentin ULg

Conference (2013, October)

Untangling geosphere-biosphere interactions is crucial to understand the biodiversity and how it might evolve in a changing environment. But little is known about the possible impact of environmental ... [more ▼]

Untangling geosphere-biosphere interactions is crucial to understand the biodiversity and how it might evolve in a changing environment. But little is known about the possible impact of environmental changes on animals occupying the highest levels of the marine trophic chains. The Cretaceous period offers a fantastic opportunity to investigate such relationship, being characterized by a globally warm but changing climate and a diverse assemblage of aquatic reptiles that underwent profound modifications during this period, ultimately permitting the diversification of the animals dominating nowadays marine ecosystems. The origin, magnitude and nature of these turnovers are poorly understood and have rarely been investigated in a global canvas. Especially, how and why ichthyosaurs, the ‘fish-shaped’ marine reptiles, went extinct at the beginning of the Late Cretaceous has been a mystery for decades. Previous assessments of their diversity suggested ichthyosaurs were already on the decline since the end of the Jurassic; their final extinction was therefore regarded as anecdotal. Several theories have proposed unique biological drivers to this event, including a break in the food chain or competition with other marine vertebrates. The reassessment of the taxonomy, phylogeny and paleoecology Cretaceous ichthyosaurs from Eurasia tells a much different story. Ichthyosaurs were ecologically and taxonomically diverse in several Eurasian ecosystems up to the latest Early Cretaceous. This revision also reveals that their extinction is diachronic, being staggered over four phases that span the entire Cenomanian stage. Detailed comparison with other groups suggests the multiphased extinction of ichthyosaurs is not an isolated event, as was previously assumed, but correlates with profound, multiphased turnovers among other marine animals, such as microplankton, rudists, ammonoids, and pythonomorphs. The diversity and contemporaneity of the biotic responses suggest worldwide physicochemical drivers for this profound reorganization of the marine ecosystems. The extinction of ichthyosaurs therefore appears as one of the facets of a much wider event that affected most of the marine ecosystems during the Cenomanian. [less ▲]

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See detailLes travaux de reméandration de l'Eau Blanche dans le cadre du projet Walphy: comparatif des techniques, coûts et efficacité
De le Court, Bernard; Verniers, Gisèle; Peeters, Alexandre ULg

Conference (2013, October)

L’Eau Blanche est un petit cours d’eau de plaine s’écoulant dans une région agricole. Il a subi dans les années 60 des travaux importants de rectification qui ont fortement banalisé ses habitats ... [more ▼]

L’Eau Blanche est un petit cours d’eau de plaine s’écoulant dans une région agricole. Il a subi dans les années 60 des travaux importants de rectification qui ont fortement banalisé ses habitats aquatiques et rivulaires et bloqué sa dynamique fluviale. Dans le cadre du projet Walphy, des travaux de restauration du cours d’eau ont été réalisés de 2010 à 2011 sur 3 sites, présentant des contraintes différentes en fonction desquelles on a du faire varier l’ambition de la restauration. Dans le village de Mariembourg, les aménagements se limitent à améliorer le lit mineur par des structures diversifiant les écoulements et la création de petits habitats piscicoles. A Nismes, une emprise modeste dans le lit majeur permet la recréation d’une sinuosité par déblai et remblai. A Boussu, un ancien méandre s’étalant largement dans le lit majeur a pu être récupéré. Les trois chantiers sont comparés dans leur conception, leur mise en œuvre et leur coût. Deux ans après les travaux, une évaluation de l’efficacité des réalisations est proposée sur base d’une cartographie des micro-habitats et le calcul d’indices hydromorphologiques. Par ailleurs, la dynamique du cours d’eau a fait l’objet d’un suivi basé sur l’analyse de levés topographiques. Cette analyse est complétée par les premiers résultats de suivis biologiques (macrophytes, macro-invertébrés et poissons). [less ▲]

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See detailDe l'importance des représentations pour résoudre des problèmes « non routiniers ».
Vlassis, Joëlle; Gamo, Sylvie; Fagnant, Annick ULg

Conference (2013, October)

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See detailNursing adherence on ventilator care bundle in a burn unit.
DEPAYE, Nicolas ULg; ROUSSEAU, Anne-Françoise ULg; LAPORT, Virginie ULg et al

Conference (2013, September 30)

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See detailLa météorologie et la climatologie dans la politique scientifique belge
Pirot, Pascal ULg

Conference (2013, September 28)

Detailed reference viewed: 30 (3 ULg)
See detailPères gays en transition: croyances, relations et pistes thérapeutiques
D'Amore, Salvatore ULg

Conference (2013, September 28)

Detailed reference viewed: 11 (0 ULg)
See detailPsychological factors affecting childsness
Naziri, Despina ULg

Conference (2013, September 27)

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See detailFluidothérapie chez le veau
Sartelet, Arnaud ULg; Lecomte, Denis; Theron, Léonard ULg et al

Conference (2013, September 27)

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See detailWP8 and WP9 developments: Data-Interpolating Variational Analysis (Diva) developments
Troupin, Charles ULg; Barth, Alexander ULg; Ouberdous, Mohamed et al

Conference (2013, September 27)

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See detailLondon or New York? Mobility Options of Young Belgians in Times of Crises
Lafleur, Jean-Michel ULg

Conference (2013, September 26)

Since the beginning of the financial and economic crisis, Belgium has experienced a new influx of Southern European immigration while continuing to receive large numbers EU citizens proceeding from ... [more ▼]

Since the beginning of the financial and economic crisis, Belgium has experienced a new influx of Southern European immigration while continuing to receive large numbers EU citizens proceeding from Central and Eastern European Member States. This reality is however hiding the fact that, simultaneously, a large number of Belgian citizens continue to leave the country every year. Belgian emigration has indeed tripled between 1970 and 2011 and nowadays about 35.000 citizens leave the country every year. Despite the increase in the number of Belgian pensioners retiring abroad, the modal age of departure remains low (26 years old). In this paper, I propose to examine two related questions on the emigration of young Belgians. First, what are the motivations of young Belgians to leave their home country today even though Belgium seems to be resisting better than most Member States to the economic crisis? Second, what drives Belgian emigrants to specific cities abroad? [less ▲]

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See detailCharacterization of tumor heterogeneity using bioimage informatics and 3D computational modeling
Stamatelos, Spyros; Carlier, Aurélie ULg; Kim, Eugene et al

Conference (2013, September 25)

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See detailLa communication sur les plantes invasives: bilan et perspectives
Halford, Mathieu ULg

Conference (2013, September 25)

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See detailQuelle est l’influence de la culture de la génération C sur le rapport au travail et au management ?
Cusumano, Christophe ULg

Conference (2013, September 25)

Generation C, also known as generation Z, is a term used to designate people born between 1987 and 1994. This study aims to answer the following question: Is it generation C merely a subgroup of ... [more ▼]

Generation C, also known as generation Z, is a term used to designate people born between 1987 and 1994. This study aims to answer the following question: Is it generation C merely a subgroup of generation Y, or is it a separate group? The perspective of this study is focusing on the codes, the moral values, the attitudes, and the representation towards work and management of generation C. After a brief review of the concept of generation and an overview of the scientific literature on the topic of the baby boom generation, generation X, Y, and C, the results of the empiric study will be presented. This study is based on one hand on interviews and focus groups, which allowed us to question 100 people, as well as, on the other hand on a survey answered by 400 individuals. The conclusion is that there is a moderate influence of generations on the relationship of work and management. Generation C is characterized by a heightening of the traits of generation Y. It does distinguish itself on a qualitative manner on several aspects, such as its relationship towards technology, on the management follow up, and on the perception if the company's boundaries. [less ▲]

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See detailDosage des catécholamines et métabolites par LCMS-MS
LE GOFF, Caroline ULg

Conference (2013, September 25)

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See detailConception et utilisation de « seepage-meters » artisanaux pour l'étude des interactions «rivière – eaux souterraines » au Burkina Faso
Sauret, Elie ULg; Nitcheu, Martial; Orban, Philippe ULg et al

Conference (2013, September 25)

Situé à l'ouest du Burkina Faso dans la région de Bobo Dioulasso, le bassin du Kou présente un contexte climatique et hydro(géo)logique, favorables à l'accumulation et à la mobilisation d’importantes ... [more ▼]

Situé à l'ouest du Burkina Faso dans la région de Bobo Dioulasso, le bassin du Kou présente un contexte climatique et hydro(géo)logique, favorables à l'accumulation et à la mobilisation d’importantes ressources en eaux souterraines et de surface, en témoigne, les sources de Nasso/guinguette au centre de bassin qui ont un débit d'environ 6000 m3/h. D'un point de vue hydrogéologique, les sources qui constituent les points d’émergences des formations aquifères profonds du bassin se déchargent dans la rivière (Kou) et assurent ainsi sa pérennité tout au long de l’année. D’amont en aval du bassin, le Kou est largement exploité par les agriculteurs installés ça et là de part et d’autre de ses rives. Malheureusement, au cours des vingt dernières années un afflux important de nouveaux agriculteurs a constitué une pression sur les ressources en terres et en eau du bassin, occasionnant une concurrence aigue à tendance conflictuelle entre les différents exploitants agricoles autour de la rivière. Pour mieux caractériser et, quantifier l'évolution dans le temps des ressources en eau du Kou , une série de tests et études hydrogéologiques prenant en compte les deux autres réservoirs : les aquifères sédimentaires profonds et la plaine alluviale déployé tout au long de la rivière, ont été réalisées. Les techniques de mesure directe par seepage meters des volumes d’eau échangés à l’interface «rivière - nappe» ont permis de quantifier localement les transferts d’eau et déceler les directions et sens des échanges entre les différents réservoirs. Les résultats obtenus ont montré qu’il existe des sections où le Kou gagne (1.5 m3/s) ou perd (-0.10 m3/s) de l’eau au profit ou au détriment des eaux souterraines (aquifères sédimentaires profonds et plaine alluviale). Ces résultats ont été validés par des analyses hydrochimiques des échantillons d’eau prélevés. [less ▲]

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See detailAfter-Care : from Johannesburg 1930 to the Sixties in Western Coalfield Societies
Geerkens, Eric ULg

Conference (2013, September 25)

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See detailMise en oeuvre du formalisme multifractal sur les espaces Snu
Kleyntssens, Thomas ULg; Nicolay, Samuel ULg

Conference (2013, September 24)

When considering very irregular functions, it does not make sense to try to characterize the pointwise irregularity because it can change from one point to another. It is more interesting to compute the ... [more ▼]

When considering very irregular functions, it does not make sense to try to characterize the pointwise irregularity because it can change from one point to another. It is more interesting to compute the spectrum of singularities, ie "the size'' of the set of points which share the same pointwise irregularity; by size, one means the Hausdorff dimension. To compute the spectrum of singularities in practice, we use a multifractal formalism. In 1885, Frisch and Parisi have proposed a first formalism. Its main default is that it always leads to a concave spectrum. In 2004, Stéphane Jaffard has introduced the Snu spaces. They lead to a new multifractal formalism which can detect non concave spectra. In practice, one has to avoid the concept of limit and to deal with finite size effects (for example, one can only calculate a finite number of wavelet coefficients). I present a method to determine the spectrum based on the Snu spaces and I illustrate it numerically on theoretical functions. [less ▲]

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See detailAPI design for machine learning software: experiences from the scikit-learn project
Buitinck, Lars; Louppe, Gilles ULg; Blondel, Mathieu et al

Conference (2013, September 23)

scikit-learn is an increasingly popular machine learning library. Written in Python, it is designed to be simple and efficient, accessible to non-experts, and reusable in various contexts. In this paper ... [more ▼]

scikit-learn is an increasingly popular machine learning library. Written in Python, it is designed to be simple and efficient, accessible to non-experts, and reusable in various contexts. In this paper, we present and discuss our design choices for the application programming interface (API) of the project. In particular, we describe the simple and elegant interface shared by all learning and processing units in the library and then discuss its advantages in terms of composition and reusability. The paper also comments on implementation details specific to the Python ecosystem and analyzes obstacles faced by users and developers of the library. [less ▲]

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See detailEinleitung
Brüll, Christoph ULg; Rohrkamp, René

Conference (2013, September 21)

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See detailSerial order working memory is impaired in developmental dyscalculia
Attout, Lucie ULg

Conference (2013, September 21)

Several studies explored associations between impairments in verbal working memory (WM) and numerical cognition, but with inconclusive findings. The present study explored verbal WM impairment in children ... [more ▼]

Several studies explored associations between impairments in verbal working memory (WM) and numerical cognition, but with inconclusive findings. The present study explored verbal WM impairment in children with developmental dyscalculia, by adopting the critical distinction between WM for item information (the items to be retained) and WM for order information (the order of the items within a list). We hypothesized that especially WM for order should be related to impaired numerical abilities, given that recent studies suggest close interactions between the representation of order information in WM and ordinal numerical processing. We investigated item and order WM capacities as well as basic numerical processing abilities in 16 children with dyscalculia (age: 8-11 years) and 16 typically developing children matched on age, IQ and reading abilities. WM for order information was assessed via a serial order reconstruction task which maximized serial order storage requirements. WM for item information was assessed using a single monosyllabic nonword delayed repetition maximizing phonological item processing. We observed that the group with dyscalculia performed significantly slower than the control group in symbolic order and magnitude judgment task, while not being slowed on general measures of processing speed. Dyscalculic participants also performed significantly poorer and with less precision than controls in the order WM task, but not in the item WM task. These results highlight a specific impairment for WM for serial order in dyscalculia, and could reflect a more general serial order processing impairment for both WM and numerical domains. [less ▲]

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See detailIntroduction
Bilhaut, Anne-Gaël ULg

Conference (2013, September 20)

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See detailHow to perform the most minimal invasive cholecystectomy?
DETRY, Olivier ULg

Conference (2013, September 20)

Twenty years ago, laparoscopy has totally transformed the surgical approach of the gallbladder. For those who were not in surgery at that time, it has to be reminded that most open cholecystectomies ... [more ▼]

Twenty years ago, laparoscopy has totally transformed the surgical approach of the gallbladder. For those who were not in surgery at that time, it has to be reminded that most open cholecystectomies performed in the 80’s required nasogastric tube for several days, surgical drain, and 5 to 8 days of hospitalisation. For these obvious advantages, laparoscopic cholecystectomy has become the “Gold Standard” without evidence by a randomised controlled study comparing open and laparoscopic techniques. These last years, some groups proposed variations of laparoscopic cholecystectomies that they presented as less invasive. In robotic surgery, the Da-Vinci device has been proposed without significant improvement since more than 10 years. To date, no interest of this Da-Vinci robot has been demonstrated in abdominal surgery. Its cost for acquisition, its yearly fee and the cost for each use render its use without proof of results totally inappropriate. Single-Incision Laparoscopic Surgery (SILS) has also been described to perform cholecystectomy with only one larger umbilical incision. Until now, no superiority of SILS on classical cholecystectomy has been demonstrated. The Natural Orifice Transluminal Endoscopic Surgery (NOTES) proposes to use the vagina, the stomach or the colon to remove the gallbladder. No prospective controlled comparison has proved the superiority of these approaches that sometimes do not reach common sense or usual surgical principles. What is a minimal invasive cholecystectomy? A safe and un expensive cholecystectomy, with a good anatomical exposure, a cholangiography, and a good surgical comfort allowing to perform several procedures in the same day; a cholecystectomy that can be performed as a day-case without complications; a cholecystectomy that can be performed laparoscopically in acute settings; a cholecystectomy without the risk of postoperative incisional hernia. In necessary, in young and thin woman, laparoscopic cholecystectomy may be performed using 2 mm trocars that allow a good triangulation but with minimal scars. [less ▲]

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See detailLa querelle autour d'une fondation psychologique des sciences historiques
Dewalque, Arnaud ULg

Conference (2013, September 20)

La psychologie peut-elle être considérée comme le « fondement » (Grundlage) des sciences de l’esprit ? Si oui, à quelles conditions ? Cette question a profondément divisé le paysage philosophique au ... [more ▼]

La psychologie peut-elle être considérée comme le « fondement » (Grundlage) des sciences de l’esprit ? Si oui, à quelles conditions ? Cette question a profondément divisé le paysage philosophique au tournant du XXe siècle. D’un côté, certains auteurs, comme le brentanien Carl Stumpf (1848-1936), l’élève de Dilthey, Max Frischeisen-Köhler (1878-1923), ou celui de Benno Erdmann, Erich Becher (1882-1929), répondent par l’affirmative : oui, la psychologie est la discipline fondamentale des sciences de l’esprit, comme la physique ou la mathématique est la discipline fondamentale des sciences de la nature. D’autres auteurs, en revanche, contestent que la psychologie puisse fonder les sciences historiques et réclament un autre fondement, non psychologique. C’est le cas, exemplairement, des néokantiens de l’école de Bade, Wilhelm Windelband (1848-1915) et Heinrich Rickert (1863-1936). Dans cet exposé, je suggère que l’approche psychologique présente certains avantages. L’intuition fondamentale derrière l’idée d’une fondation psychologie de la connaissance, à mon sens, est une intuition "empiriste" : l’expérience vécue est l’origine ou la source des concepts qui nous servent à connaître le monde, c’est-à-dire à expliquer le monde naturel et à comprendre le monde historique. Connaître, c’est transférer ou appliquer des « concepts psychologiques primaires », tirés de l’expérience vécue, à des objets du monde. [less ▲]

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See detailAlgebrability of nowhere Gevrey differentiable functions
Esser, Céline ULg

Conference (2013, September 17)

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See detailSoluble biomarkers to evaluate chondroprotection: The Revolution is underway !
Henrotin, Yves ULg

Conference (2013, September 17)

Detailed reference viewed: 12 (0 ULg)
See detailThe intra-articular injection of alginate-chitosan beads in an hydrogel prevents the development of osteoarthritis in ACLT model
Oprenyeszk, Frédéric ULg; Chausson, M; Maquet, V et al

Conference (2013, September 16)

Purpose To evaluate the effects of a new biomaterial composed of alginate-chitosan (AC) beads dispersed in a viscous thermogelling chitosan-based (H) hydrogel on the development of osteoarthritis (OA) in ... [more ▼]

Purpose To evaluate the effects of a new biomaterial composed of alginate-chitosan (AC) beads dispersed in a viscous thermogelling chitosan-based (H) hydrogel on the development of osteoarthritis (OA) in rabbit. Materials & Methods OA was surgically induced by the transection of the anterior cruciate ligament (ACLT) in rabbits. One week after surgery, animals received a single intra-articular injection (900 µl) of AC beads in H hydrogel (group I), H hydrogel alone (group II) or saline (group III). OA development was followed by X-rays. Blood samples were collected throughout the study to measure biological markers (PGE2 and CRP). Macroscopic observation and histological evaluation of articular cartilage and synovial membrane were performed 6 weeks after surgery. Results The X-rays analysis showed a significant decrease (p <0.05) of the Kellgren and Lawrence score in group I (1.5 ± 0.2) compared with group II (2.2 ± 0.5) and group III (3.0 ± 0.4). The size and the severity of the macroscopic OA cartilage lesion tended to decrease in group I compared to the other groups. The histological global score that refers to all compartments of the knee joint was significantly decreased in group I (11.0 ± 0.7) compared to group II (14.4 ± 0.6, p <0.01) and group III (14.8 ± 0.6, p <0.001). The injection of AC beads in H hydrogel also tended to reduce the synovial membrane inflammation. No significant variation of PGE2 and CRP serum levels were observed in each after 6 weeks follow-up whatever the treatment injected. Conclusion This study showed that AC beads dispersed in H hydrogel prevented OA in ACL transection rabbit model. This effect was not observed with the hydrogel alone, suggesting that AC beads play a role in joint protection. The preventive effect was observed in all joint compartments indicating a global protective effect of this new implantable biomaterial. [less ▲]

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See detailPsychanalyse et homosexualité
Naziri, Despina ULg

Conference (2013, September 16)

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See detailSilver nanowire network : physical properties and effects of thermal treatments
Lagrange, Mélanie; Langley, Daniel ULg; Giusti, Gael et al

Conference (2013, September 16)

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See detailRegional urban groundwater body risk assessment of contaminants using remotely sensed multi-resolution land-cover data
Batelaan, Okke; Dujardin, Juliette; Jamin, Pierre ULg et al

Conference (2013, September 15)

Contaminated sites are often the result of past relatively anarchic economical and industrial development. The last decades stakeholders are more aware of the risks posed by these sites. Within the Frac ... [more ▼]

Contaminated sites are often the result of past relatively anarchic economical and industrial development. The last decades stakeholders are more aware of the risks posed by these sites. Within the Frac-Weco project an integrated framework for the assessment, at regional scale, of the risks posed by these contaminated sites on water resources and ecosystems has been developed. The methodology is based on the calculation of contaminant fluxes reaching the receptors providing a way of estimating the level of exposure/degradation of these receptors at the groundwater body scale. The most important contamination problems at regional scale are located around old urban and industrialized areas. The land-cover distribution in these zones is of prime importance because it determines the spatial variation of groundwater recharge, which is the main vector of contaminant leaching from soil surface to groundwater. To obtain detailed information about land cover for groundwater recharge modeling, a stratified satellite image classification approach was adopted combining land-cover mapping at pixel level for the studied area as a whole with sub-pixel estimation of imperviousness within built-up zones. The obtained land-cover data is used as an input in the WetSpass model to simulate groundwater recharge at high resolution in spatially complex urban areas. In the next step the simulated groundwater recharge is used as an input in a regional scale groundwater flow and transport model simulating contaminant dispersion through the aquifer. Modeling results are further used to calculate a quality index for the whole groundwater body based on threshold values defined specifically for each contaminant. The approach proposed has been applied on the RWM073 groundwater body corresponding to the alluvial deposits of the Meuse River, Liège (Belgium). The high-resolution groundwater recharge estimations obtained by integrating remote sensing in the modeling procedure allow a better identification of the potential sources of contaminants and enable a proper quantification of total fluxes of contaminants from brownfields into the groundwater. The developed framework for regional risk assessment results in a global quality indicator for the groundwater body which can be used as input for decision-making. [less ▲]

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See detailHealth related guidelines for wind farms in Belgiu m
van den Berg, Frits; Passchier, Wim; Botteldooren, Dick et al

Conference (2013, September 15)

In 2011 the Belgian authorities have asked the Supe rior Health Council (SHC) to advise on the health e ffects of wind farms. A working group of experts with diff erent backgrounds was put together to ... [more ▼]

In 2011 the Belgian authorities have asked the Supe rior Health Council (SHC) to advise on the health e ffects of wind farms. A working group of experts with diff erent backgrounds was put together to assess all th e available literature. This group considered the req uest in the context of sustainable development and drafted an advice that was reviewed by two international ex perts. It is expected that the advice will be publi shed in the spring of 2013. The advice mentions direct effects of operational w ind turbines that may have negative consequences fo r the health and well-being of neighbouring people. It st resses the importance of factors such as the change in landscape, the possible intrusion on people’s attac hment to their environment and the effect of local economic benefits and costs associated with a wind energy project. Also, the perception of the future quality of life will determine the social acceptance of a w ind project by a local community. The advice gives a number of recommendations to better deal with all t hese aspects. The paper will give an overview and explanation of these recommendations. [less ▲]

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See detailHistoire culturelle du goût. Vers l'invention d'une gastronomie française
Von Hoffmann, Viktoria ULg

Conference (2013, September 14)

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See detailAditi et les naissances héroïques
Swennen, Philippe ULg

Conference (2013, September 13)

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See detailCrop association to improve biological control: case study on pea and wheat aphids
Chevalier Mendes Lopes, Thomas ULg; Bodson, Bernard ULg; Francis, Frédéric ULg

Conference (2013, September 13)

Nowadays, strategies used to control aphids in fields of pea, Pisum sativum L., and wheat, Triticum aestivum L., still rely on synthetic insecticides which have negative effects on the environment and ... [more ▼]

Nowadays, strategies used to control aphids in fields of pea, Pisum sativum L., and wheat, Triticum aestivum L., still rely on synthetic insecticides which have negative effects on the environment and human health. This research focused on the development of sustainable alternative methods, with special emphasis on cultural practices and plant management systems. Increasing the diversity within crops may have several beneficial effects on pest control, creating attractive habitats for indigenous beneficial fauna and simultaneously deterring pests – the ‘push-pull’approach. In this field study, two wheat/pea associations (mixed cropping and strip cropping) where compared to monocultures of pea and wheat. The abundance and diversity of adult aphidophagous insects (predators and parasitoids) were accessed weekly using yellow traps, while aphids were observed directly on plants. In both crops, the percentage of plants infested with aphids and density of aphid colonies were significantly higher in monocultures during periods of aphid abundance. Mixed cropping was particularly beneficial for the pea, whereas strip-cropping was more efficient for the wheat. The abundance of beneficials was significantly higher in monocultures comparing to the other treatments. Quantitative aphid-natural enemy food webs showed that the abundance of the two main ladybird species, Coccinella septempunctata L. and Propylea quatuordecimpunctata (L.), increased with the occurrence of Acyrthosiphon pisum (Harris) on pea plants. Abundance of the two main species of Syrphidae, Sphaerophoria scripta (L.) and Eupeodes corollae (F.), increased with the occurrence of Sitobion avenae (F.) and Metopolophium dirhodum (Walker) on wheat plants. This study shows that increasing diversity within crops can help lower aphid infestations. However, additional methods are needed to more efficiently attract aphidophagous beneficials and promote the natural control of aphids. [less ▲]

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See detailCongenital pseudarthrosis of the tibia: a mathematical approach
Van Schepdael, An; Carlier, Aurélie ULg; Ashbourn, Joanna et al

Conference (2013, September 13)

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See detailWhere are the politics in responsible innovation? European governance, technology assessments, and beyond
Van Oudheusden, Michiel ULg; Charlier, Nathan ULg

Conference (2013, September 13)

Responsible innovation (RI) is founded on the idea that the introduction and adoption of technology in society fails when technologies do not reflect societal needs and values. Hence, proponents of RI ... [more ▼]

Responsible innovation (RI) is founded on the idea that the introduction and adoption of technology in society fails when technologies do not reflect societal needs and values. Hence, proponents of RI solicit society’s opinions in an attempt to render technology developments and policies more socially responsive. Solicitation typically takes the form of broad consultations involving as many relevant stakeholders as possible, in ways that enhance inclusiveness, transparency, and deliberation. This paper asks how the RI concept is taken up and elaborated, based on accounts developed on the EU policy level and on a local, Flemish, technology assessment level. It finds that, notwithstanding important differences between these two deliberative frameworks, neither one leaves much room for politics, understood as the constitution and contestation of power. Rather, these frameworks largely ignore questions about the politics in deliberation (e.g. how actors craft RI through strategic use of argument and other advantage-seeking techniques), as well as the politics of deliberation (i.e. how RI privileges a process definition of democracy at the cost of participatory and representative perspectives). In addition, these frameworks forsake questions about the authoritative allocation of values (as in formalized, representative politics) and the institutional uptake of deliberative engagements more broadly. The paper’s aim is to provide a constructive criticism of the RI paradigm by rendering the above political issues explicit and proposing ways of taking them into account. [less ▲]

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See detailAN IMMUNOLOGICAL METHOD TO COMBINE THE MEASUREMENT OF ACTIVE AND TOTAL HUMAN MYELOPEROXIDASE ON THE SAME SAMPLE FROM A COMPLEX MEDIUM
Franck, Thierry ULg; MINGUET, Grégory ULg; Mossay, Pierre et al

Conference (2013, September 12)

Active neutrophil myeloperoxidase (MPO) is a powerful producer of oxidant molecules in acute or chronic inflammation, and it is essential to measure its activity in biological samples. We combined two ... [more ▼]

Active neutrophil myeloperoxidase (MPO) is a powerful producer of oxidant molecules in acute or chronic inflammation, and it is essential to measure its activity in biological samples. We combined two immunological techniques, the SIEFED (specific immunologic extraction followed by enzymatic detection) and an ELISA, to measure the active and total contents of human MPO on the same sample and with the same calibration curve, to define an accurate ratio between the active and total enzyme. After the extraction of MPO from aqueous or biological samples by immobilized anti-MPO antibodies followed by a washing to eliminate unbound material, the active and the total contents of the enzyme were sequentially measured without interferences (patent: EP2017351-B1, 2010). Compared to a classical sandwich ELISA, there is one additional step corresponding to the in situ measurement of MPO activity, but this step does not affect the following measurement of the total MPO content. After validation, the combined technique was applied to a whole blood model of in vitro stimulation with phorbol-myristate-acetate (PMA), cytochalasin B/N-formyl-methionyl-leucyl-phenyl-alanine (CB/fMLP) or lipopolysaccharide/ tumor necrosis factor-alpha (LPS/TNF-α) (n=9). The active/total MPO ratio in whole blood reached 0.267±0.126 for non-stimulated condition and was significantly (p<0.05) higher for PMA (0.360±0.106), CB/fMLP (0.380±0.113) and LPS/TNF-α (0.432±0.124) stimulated conditions. These different ratios highlight the real oxidant potential of MPO, which depends on the stimulating conditions, witness of what could happen in pathological situations with diagnostic purpose. The combined SIEFED/ELISA method also appeared as a powerful tool to screen potential inhibitors that could interact directly with the enzyme, either on its active site or on another key position. [less ▲]

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See detailCarbon nanotubes/polypropylene nanocomposites foams for EMI shielding applications
Tran, Minh Phuong ULg; Detrembleur, Christophe ULg; Thomassin, Jean-Michel ULg et al

Conference (2013, September 12)

In order to reduce the undesired effect of the electromagnetic interference, the developing of the materials with high capacity of electromagnetic interference (EMI) shielding has attracted a great ... [more ▼]

In order to reduce the undesired effect of the electromagnetic interference, the developing of the materials with high capacity of electromagnetic interference (EMI) shielding has attracted a great attention to scientific and industrial communities during last two decades.Indeed, polymer carbon nanotubes (CNTs) nanocomposites foams are addressed due to their high electrical conductivity and a great potential applications in electrostatic dissipation (ESD) and in electromagnetic interferences (EMI) shielding. However, the shortcoming of the addition of CNTs is that it usually leads to an increase of permittivity which results in enhancing undesirably the electromagnetic reflectivity due to the mismatch between the wave impedances for the signal propagating into air and into the absorbing material, respectively. To solve this problem, the introduction of air into these nanocomposites by the formation of foam will be favorable in order to reduce the permittivity of conductive composites. A good understanding of the influence of the foam structural parameters on the electrical properties of the foam will ultimately enable the optimum design of these materials for the targeted applications. A wide range of poly (propylene)/CNTs nanocomposites foams were synthesized using the supercritical CO2 technology. Different foaming parameters, such as the temperature, impregnation pressure will be controlled to modify the foam structure. Nanocomposite foams show higher electrical conductivity than non-foamed nanocomposites at the same volume content of CNTs. Effects of foam morphology such as cell density, pore size, volume expansion, and cell-wall thickness on electrical conductivity were comprehensively assessed. Similarly to our previous study on PMMA foam nanocomposites, the electrical conductivity of foams show higher value when the volume expansion is increased and when the average pore size is decreased. The preliminary EMI performances have highlighted that PP/CNTs foams containing 0.1 vol%CNTs are able to absorb about 90% of the incident radiation in the 25 to 40 GHz frequency range. [less ▲]

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See detailOn the Role of Out-of-Equilibrium Microstructures in Ti-6Al-4V and in Stainless Steel 316L Processed by Selective Laser Melting in Determining their Mechanical Properties
Mertens, Anne ULg; Reginster, Sylvie ULg; Paydas, Hakan ULg et al

Conference (2013, September 12)

Additive manufacturing processes such as Selective Laser Melting (SLM) appear very promising in view of the economic production of near-net-shape, complex and (almost) fully dense parts from metallic ... [more ▼]

Additive manufacturing processes such as Selective Laser Melting (SLM) appear very promising in view of the economic production of near-net-shape, complex and (almost) fully dense parts from metallic materials such as Ti alloys and stainless steels. Practically, in SLM, a metallic powder is deposited layer-by-layer in a powder bed and then molten locally according to the desired shape. An important feature of this process is that the structure undergoes an ultra-fast cooling once the beam leaves the working zone, thus giving rise to strongly out-of-equilibrium microstructures. In the case of Ti alloy Ti-6Al-4V, in particular, the microstructural anisotropy resulting from the epitaxial growth of the newly deposited layer on the material previously solidified has been shown to exert a very strong influence on the mechanical properties [1]. In the present work, the microstructures and mechanical properties of Ti-6Al-4V and of stainless steel 316L processed by SLM have been characterised in details. Since these two materials exhibit quite different physical behaviours, their careful comparison might shed more light into the role of phenomena such as epitaxial growth, out-of-equilibrium phase transformation and/or internal stresses in determining the mechanical properties of metallic parts processed by SLM. [less ▲]

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See detailAdult bone marrow stem cells in neurological diseases: Protect or repair?
Neirinckx, Virginie ULg

Conference (2013, September 12)

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See detailCorporate social solidarity: a conceptual and empirical exploration
Crutzen, Nathalie ULg; Louche, Céline; Van Liedekerke, Luc

Conference (2013, September 12)

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See detailStudy of the virulence of serotypes 4 and 9 of the Orbivirus African horse sickness virus in two mouse models
De la Grandière de Noronha Cotta, Maria Ana ULg; Zonta, William ULg; Mauroy, Axel ULg et al

Conference (2013, September 12)

African horse sickness (AHSV) is an infectious disease caused by a double stranded positive RNA virus which belongs to the family Reoviridae, genus Orbivirus. The virus has nine serotypes and is ... [more ▼]

African horse sickness (AHSV) is an infectious disease caused by a double stranded positive RNA virus which belongs to the family Reoviridae, genus Orbivirus. The virus has nine serotypes and is transmitted by a culicoides biting midge, principally Culicoides imicola. The establishment of an experimental model is needed for the investigation of the pathogenesis of this infection. Two mouse models, interferon-α receptor knock-out mice (A129 KO or IFNAR -/-) and immunocompetent mice (A129 WT), were tested. The viruses used for mice inoculations belonged to the two serotypes which caused epidemics in Europe, serotypes 4 and 9. The virus was inoculated by subcutaneous (SC) route and/or by intra-nasal (IN) route. Whole blood samples were taken from each mouse at regular intervals. The organs (liver, spleen, kidney, lung and brain) were taken at the end of the experiment or when the most affected mice were euthanized. All these samples were tested by a qRT-PCR targeting AHSV genome segment 7. Both serotypes of AHSV were detected by qRT-PCR until three weeks post-infection in blood of IFNAR -/- mice and A129 WT mice infected by SC route. Serotype 4 shows a higher peak of viremia than serotype 9. The peak of viremia was measured between day 2 and day 4 post-infection. These results demonstrate the potential of the immunodeficient mouse model for both clinical and biological features. The setting up of this mouse model has developed a tool for efficient in vivo study of AHSV. Research supported by the Belgium Federal Public Service, Health, Food Chain Safety and Environment. [less ▲]

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See detailModelling hydro-mechanical coupling using a FE² doublescale approach
van den Eijnden, Abraham Pieter ULg; Collin, Frédéric ULg; Bésuelle, Pierre et al

Conference (2013, September 11)

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Detailed reference viewed: 28 (7 ULg)
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See detailTo heal or not to heal: modeling the influence of oxygen during fracture healing.
Carlier, Aurélie ULg; Geris, Liesbet ULg; Van Oosterwyck, Hans

Conference (2013, September 11)

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See detailA gene regulatory network model evaluating the impact of individual factors in the hypertrophic switch
Kerkhofs, Johan ULg; Van Oosterwyck, Hans; Geris, Liesbet ULg

Conference (2013, September 11)

Chondrocytes undergoing hypertrophy show a major switch in phenotype underlied by a change in expression from the chondrocyte master gene, Sox9, to the osteoblastic one, Runx2. Strategies to stimulate or ... [more ▼]

Chondrocytes undergoing hypertrophy show a major switch in phenotype underlied by a change in expression from the chondrocyte master gene, Sox9, to the osteoblastic one, Runx2. Strategies to stimulate or inhibit this switch are of use in bone and cartilage tissue engineering respectively, as well as in the prevention of ectopic hypertrophy in osteoarthritis. We have constructed a literature based network comprised of 46 nodes and 161 interactions shown to play a part in chondrocyte hypertrophy. Network dynamics are simulated in discrete time through random updating by the use of additive functions to determine each node’s value. Furthermore, each species is represented by a fast variable (activity level, as determined by post translation modifications) which is assumed to be in equilibrium with a slow variable (mRNA) at all times. Through a Monte Carlo approach the importance of each node in the stability of chondrocytic phenotypes (proliferating, hypertrophic) is assessed in random initial conditions. A perturbation analysis of the stable states is used to determine the transition likelihood between states and the influence of individual nodes in this transition as a second measure of stability. Our results show that the hypertrophic state, marked by Runx2 expression, has a larger attractor basin and is more stable to perturbation than the proliferative state characterized by Sox9. The added time resolution seems to favour the Runx2 phenotype. The results for single nodes in overexpression or knockout simulations show a certain asymmetry, indicating that factors that are necessary for maintaining a certain phenotype are not necessarily useful in inducing it. [less ▲]

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See detailA MODEL FOR CELL/MATRIX GROWTH ON 3D SURFACES: A COUPLING OF LEVEL SET METHOD AND BRINKMAN EQUATION
Guyot, Yann ULg; Papantoniou, Ioannis; Chai, Yoke Chin et al

Conference (2013, September 11)

Detailed reference viewed: 56 (6 ULg)
See detailImpacts of a recent Streptococcus outbreak in a commensal population of long-tailed macaques (Macaca fascicularis) in Bali, Indonesia
Brotcorne, Fany ULg; Wandia, I. Nengah; Beudels-Jamar, Roseline et al

Conference (2013, September 11)

The quest for coexistence between humans and primates requires an extensive analysis of the impacts of the growing commensalism phenomenon. In South-east Asia, the long-tailed macaque adapts successfully ... [more ▼]

The quest for coexistence between humans and primates requires an extensive analysis of the impacts of the growing commensalism phenomenon. In South-east Asia, the long-tailed macaque adapts successfully to anthropogenic habitats. The low predation pressure in zones of human-macaque interface and the inclusion of human food in macaques’ diet can lead to local overpopulation. On the other hand, the risk of epidemic disease simultaneously increases with high primate density and proximity with human vectors. Data presented here represent 25 years-population dynamics of a commensal-living population of macaques in Ubud Monkey Forest (Indonesia). Over this period, the population experienced a dramatic growth with an average 11% annual increase rate. In June 2012, we counted 615 individuals divided in 5 groups with a very high density of 61 macaques per hectare. However, two Streptococcus outbreaks have also been reported over the same period, temporarily limiting the steep positive demographic trend of this population. The first epidemic episode appeared in 1994 and the second in July 2012, the last one resulting in 14% mortality in 3 out of 5 groups of the population (563 macaques in October 2012). The comparison between the pre- and post-outbreak periods in 2011-2012 shows changes in macaques’ ranging and behaviour. After the outbreak, the affected groups used smaller and more peripheral home ranges, while the non-affected groups centred their home ranges on the human provisioning places. Besides anthropic factors promoting population growth, epidemic diseases play a significant role in shaping the dynamics and behaviour of this synanthropic population and could have important implications in the future both in terms of management and local conservation status. [less ▲]

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See detailFirst evidence of a volatile sex pheromone in the invasive Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae)
Fassotte, Bérénice ULg; Fischer, Christophe ULg; Durieux, Delphine ULg et al

Conference (2013, September 10)

Until now, volatile sex pheromone have not been identified in the Coccinellidae, although various studies have suggested the existence of such molecules. In this work, we have sampled volatile organic ... [more ▼]

Until now, volatile sex pheromone have not been identified in the Coccinellidae, although various studies have suggested the existence of such molecules. In this work, we have sampled volatile organic compounds released in the headspace of virgin females of the multicolored Asian ladybeetle, Harmonia axyridis (Pallas), that were either allowed or not to feed on pea aphids (Acyrthosiphon pisum Harris). When fed on aphids, virgin females showed a stereotypical “calling behavior”, commonly associated with the emission of a sex pheromone in several Coleoptera species. Behavioral assays conducted with calling females in a four-arm olfactometer demonstrated that the blend of released volatile compounds was attractive for males, but not for other females. The headspace of virgin females that were not previously fed with aphids was not attractive for either sex. GC-MS analyses revealed the presence of five compounds in the volatile blend: (–)-β-caryophyllene, β elemene, methyl-eugenol, α-humulene and α-bulnesene. Subsequently, we have collected and quantified the constituents from the blend over a period of 9 days after exposure to aphids. All five compounds were produced exclusively after feeding virgin females with aphids, and their quantity significantly increased during the whole period of collection. (–)-β-caryophyllene was found to be the major constituent, representing between 80 and 89 % of the total blend. These results could promote the development of more specific and efficient management methods to manipulate the movements of this invasive ladybeetle and to reduce its negative impacts on biodiversity. [less ▲]

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See detailMars thermospheric temperatures retrieved from SPICAM dayglow measurements
Stiepen, Arnaud ULg; Gérard, Jean-Claude ULg; Bougher, S et al

Conference (2013, September 10)

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See detailThe Ganymede auroral footprint: implications of the spots’ multiplicity
Bonfond, Bertrand ULg; Hess, Sébastien; Bagenal, Fran et al

Conference (2013, September 10)

We report here the finding of a secondary spot for the Ganymede auroral footprint on Jupiter. Moreover, we characterize the evolution of the Ganymede footprint morphology with longitude and time. Finally ... [more ▼]

We report here the finding of a secondary spot for the Ganymede auroral footprint on Jupiter. Moreover, we characterize the evolution of the Ganymede footprint morphology with longitude and time. Finally, we discuss the implications of these results with respect to the morphology of the other satellite footprints. [less ▲]

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See detailDifferent phases of water transfer during rock drying
Prime, Noémie ULg; Housni, Zakarya; Fraikin, Laurent ULg et al

Conference (2013, September 10)

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See detailÀ propos de la régulation des établissements scolaires : analyse de deux dispositifs endogènes de traitement du décrochage et de la violence scolaires
Dethier, Baptiste ULg

Conference (2013, September 09)

Cette contribution présente les résultats de deux études de cas réalisées dans deux établissements d’enseignement secondaire situés en Belgique francophone. Ces deux écoles ont chacune mis en place un ... [more ▼]

Cette contribution présente les résultats de deux études de cas réalisées dans deux établissements d’enseignement secondaire situés en Belgique francophone. Ces deux écoles ont chacune mis en place un dispositif d’accrochage scolaire endogène dans le but de lutter plus efficacement contre le décrochage et la violence scolaires et d’offrir une alternative à l’exclusion provisoire ou définitive. Ces innovations locales proposent, de manière partielle ou totale, d’accueillir des élèves « en difficulté » et de leur fournir un accompagnement à la fois éducatif et pédagogique, tout en soulageant les enseignants et les autres élèves. La présence de ces jeunes au sein de dispositifs endogènes se veut provisoire et a donc comme objectif leur réintégration en classe, dans « les meilleures conditions possibles ». Il s’agira de décrire ces solutions concrètes visant à lutter contre des problèmes concrets tels que le décrochage, la violence ou encore l’absentéisme. À partir d’une démarche qualitative s’inscrivant dans la sociologie de l’action organisée (Friedberg, 1993), nous rendrons compte des acteurs impliqués dans ces projets, de leurs pratiques et des interactions à travers lesquelles ils les font fonctionner. Cette analyse nous permettra d’étudier, sous ce prisme particulier, la régulation organisationnelle locale. [less ▲]

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See detailImplementation of the Multifractal Formalism on Snu Spaces
Kleyntssens, Thomas ULg; Nicolay, Samuel ULg

Conference (2013, September 09)

A multifractal formalism is a formula, numerically computable, which approximate the spectrum of singularities of a function. The first multifractal formalism (Frisch and Parisi, 1985) has the main ... [more ▼]

A multifractal formalism is a formula, numerically computable, which approximate the spectrum of singularities of a function. The first multifractal formalism (Frisch and Parisi, 1985) has the main default is that it always leads to a concave spectrum. In 2004, Stéphane Jaffard has introduced a new multifractal formalism, based on the Snu spaces, which can detect non concave spectra. In practice, one has to avoid the concept of limit and to deal with finite size effects. In this talk, I present the first results of an implementation of the multifractal formalism on Snu spaces on several theoretical functions. [less ▲]

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See detailSocial Scientist On Board In Long-Term Management Of High Level And/Or Long-Lived Radioactive Waste In Belgium
Parotte, Céline ULg

Conference (2013, September 09)

In Belgium, the long-term management of radioactive waste is under the exclusive competence of the Belgian Agency for Radioactive Waste and Enriched Fissile Materials (knew as ONDRAF/NIRAS). Unlike low ... [more ▼]

In Belgium, the long-term management of radioactive waste is under the exclusive competence of the Belgian Agency for Radioactive Waste and Enriched Fissile Materials (knew as ONDRAF/NIRAS). Unlike low-level waste, no institutional policy has yet been formally approved for the long-term management of high level and/or long-lived radioactive waste (knew as B&C waste). In this context, ONDRAF/NIRAS considers the public and stakeholders’ participation as an essential factor in the formulation of an effective and legitimate policy. This is why it has decided to integrate them in different ways during the elaboration of the Waste Plan (ONDRAF/NIRAS-document containing guidelines to make a principled policy decision about nuclear waste management). To do so, social scientists have been regularly mobilized either as external evaluators, follow-up committee members, or participatory observants. Hence, the Waste Plan is only the first step in a long decision-making process. <br />For a PhD student under contract with ONDRAF/NIRAS, this mandate consists of thinking out a way to construct an inter-organizational innovative communication system that would be participative, transparent and embedded in a long- term perspective, thus integrating all the further legal steps to take throughout the decision-making process. In this regard, two paradoxical constraints must be taken into account: on the one hand, my own influence on the legal decision-making process should remain limited, because of a series of constraints, lock-ins and previous decisions which have to be <br />respected; on the other hand, ONDRAF/NIRAS expects the research conclusions to be policy relevant and useful. <br />In this paper, the purpose is twofold. Firstly, the issues raised by this policy mandate is an opportunity to question the performative dimensions of the social scientist in the decision- making process and, more specifically, to have a reflexive view on our position as PhD Student. Secondly, assuming the role of “embarked” social scientist, numerous of answers will discuss to face the different dilemmas of the researcher “in action”. Those reflections follow on, among others, those from previous papers discussed in Quimper in April 2013 [1] and in Leuven in June 2013 [2]. [less ▲]

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See detailDerivation of high resolution TSM data by merging geostationary and polar-orbiting satellite data in the North Sea.
Alvera Azcarate, Aïda ULg; Barth, Alexander ULg; Vanhellemont, Quinten et al

Conference (2013, September 09)

There is a need for high resolution ocean colour data, both in space and time, for a better assessment of the variability of these data and their influence in the environment, specially at shallow areas ... [more ▼]

There is a need for high resolution ocean colour data, both in space and time, for a better assessment of the variability of these data and their influence in the environment, specially at shallow areas where factors as tides and wind play a role in their dynamics. High spatial resolution is achieved by polar-orbiting satellites, but at a low temporal resolution. The opposite is true for geostationary satellites. In order to exploit the complementary nature of geostationary and polar data, a merging methodology has been developed to obtain a unique estimate of the North Sea Total Suspended Matter (TSM). The largest difficulty in developing a merging methodology is the correct estimation of the error covariance matrix, which can be specially complex for variables like TSM. In this work, the error covariance is not parametrized a priori using an analytical expression, but expressed using a truncated spatial EOF basis calculated by analysing MODIS data using DINEOF (Data INterpolating Empirical Orthogonal Functions). This EOF basis represents more realistically the complex variability of the TSM data sets than the parametric covariance used in most optimal interpolation applications. This EOF basis is subsequently used to merge MODIS and SEVIRI TSM data using an optimal interpolation approach. Results for the North Sea 2009 TSM will be shown, demonstrating the possibilities of this technique. The influence of including variables like winds or tides in the analysis, through multivariate approaches, will be assessed. [less ▲]

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See detailMicrostructure and Thermomechanical Behaviour of Magnesium – C nanotubes Composites produced by Friction Stir Processing
Mertens, Anne ULg; Simar, Aude; Garray, Didier et al

Conference (2013, September 09)

Due to their exceptional mechanical and thermal characteristics, C nanotubes (CNTs) are attracting an ever increasing interest in view of tailoring the properties of metal matrix composites (MMCs) e.g ... [more ▼]

Due to their exceptional mechanical and thermal characteristics, C nanotubes (CNTs) are attracting an ever increasing interest in view of tailoring the properties of metal matrix composites (MMCs) e.g. for applications at high service temperature or in thermal management… However, the poor wettability of CNTs by molten metals and their strong tendency to agglomerate are major obstacles to the large-scale production of CNTs-MMCs by classical ‘liquid-state’ processing routes such as squeeze casting. As an innovative ‘solid state’ process, Friction Stir Processing (FSP) hence appears as a very promising alternative for the production of CNTs-MMCs [1], although the method for inserting the reinforcing phase - in grooves or holes machined in the matrix material - remains time-consuming and labour-intensive. More recently, Mertens et al. [2] proposed a new and easier technique for the insertion of C fibres in FSPed Mg-matrix composites i.e. FSP of a C fabric stacked between two metal sheets. In the present work, the feasibility of extending this latter method to the production of CNTs-MMCs has been assessed. “Bucky papers” – made from agglomerated CNTs, thus ensuring for their safe handling – were stacked between two sheets of Mg alloy AZ31B, and the resulting sandwich was FSPed. The effect of FSP experimental parameters such as the rotational and advancing speeds, and the number of FSP passes, on the microstructure of the composites and particularly on the distribution of the CNTs in the Mg matrix has been carefully studied. Moreover, a particular attention has been given to the characterization of the thermomechanical behaviour of the FSPed AZ31B-CNTs composites. [less ▲]

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See detailPolymer based intraocular lens adsorbome: a bottom up proteomics study
Bertrand, Virginie ULg; Huang, Yi-Shiang ULg; Mazzucchelli, Gabriel ULg et al

Conference (2013, September 08)

In the present work an optimized sample preparation protocol to identify and quantify the “adsorbomes” of hydrophilic and hydrophobic materials for IOLs known to have a higher or a lower incidence of PCO ... [more ▼]

In the present work an optimized sample preparation protocol to identify and quantify the “adsorbomes” of hydrophilic and hydrophobic materials for IOLs known to have a higher or a lower incidence of PCO, respectively was obtained. [less ▲]

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See detailTumours in the donor: what is the risk?
DETRY, Olivier ULg

Conference (2013, September 08)

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See detail'Where are my Marc records?' - Librarians' perception of discovery tools
Renaville, François ULg; Richelle, Laurence ULg; Thirion, Paul ULg

Conference (2013, September 08)

In February 2013, the ULg Library launched a new portal where the new library website and Primo were closely integrated. Three months before the official launch to the public, Primo FE was shown to ... [more ▼]

In February 2013, the ULg Library launched a new portal where the new library website and Primo were closely integrated. Three months before the official launch to the public, Primo FE was shown to library colleagues to get the first professional feedback. Several training sessions were organized for the library staff to focus on the differences between discovery tools and traditional opacs and to explain how our Primo would function (local data vs PCI, pipe process, normalization rules, deduplication, FRBRization...) Then, a survey was organized among the library staff to get their feelings and perceptions about discovery tools in general, and the impacts that such tools have, according to them on the users' habits and searches. Our presentation will explain how our library colleagues (directors, service heads, cataloguers, trainers, circulation staff, e-librarians, secretaries...) felt apprehensive and/or enthusiastic about switching to a discovery tool in general (not specifically Primo). [less ▲]

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See detailPolitical competition of collective memories at school: the Holocaust case
Grandjean, Geoffrey ULg

Conference (2013, September 07)

The school is an agent of socialisation in which coexists a plurality of collective memories. The curriculum ensures the transmission of official memory. However, alternative collective memories might ... [more ▼]

The school is an agent of socialisation in which coexists a plurality of collective memories. The curriculum ensures the transmission of official memory. However, alternative collective memories might also be discussed by students and teachers. This leads to a competition of memories. More specifically, this observation may be made regarding the transmission of the Holocaust in Belgium. This emotional historical fact, classically taught according to the official curriculum, is nevertheless sometimes questioned. This is for example the case for non-Belgian students, who consider other possible memories and want to discuss about these. In order to analyze this possible competition between collective memories, we explored the speeches of young from multiple national origins in relation to the topic of the Holocaust. Two focus groups, differing on the basis of the national origin of the participants, were conducted with young students aged form sixteen to eighteen. The discourse analysis aimed at showing (1) if there is a competition between different collective memories, and (2) to what extent political arguments are mobilized by the students. [less ▲]

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See detailHow nurses support students' reflective learning in clinical placements?
Dury, Cécile ULg

Conference (2013, September 06)

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See detailRisk Communication and Food Safety Policies: Conflicting Claims About Bisphenol A
Vanhaeren, Stéphanie ULg

Conference (2013, September 06)

We will focus on the conflicting claims between the EFSA and the EC through the case of bisphenol A perceived by Belgian stakeholders, one of the “hot topics” for the European Agency for Food Safety (EFSA ... [more ▼]

We will focus on the conflicting claims between the EFSA and the EC through the case of bisphenol A perceived by Belgian stakeholders, one of the “hot topics” for the European Agency for Food Safety (EFSA) in 2010 which eventually led – after a struggle involving various stakeholders and public opinion – to the adoption of the Directive 2011/8/EU by the European Commission (EC), restricting the use of bisphenol A in plastic baby bottles, against the findings of the EFSA. [less ▲]

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See detailgender stereotypes and problematic behaviors amongst teenagers
Gavray, Claire ULg

Conference (2013, September 06)

les stéréotypes sexués jouent sur les comportements des filles et des garçons à l'adolescence. La théorie du genre aide à comprendre ce qui se joue à ce niveau

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Peer Reviewed
See detailUsing the Pic-Nic Game in a qualitative research about divorced families.
Bullens, Quentin ULg

Conference (2013, September 06)

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See detailThe spatial footprint of the non-ferrous mining industry of Lubumbashi
Vranken, Isabelle ULg; Munyemba, François K.; Amisi, Mwana Y.

Conference (2013, September 06)

In the south-eastern part of the Katanga Province (Democratic Republic of the Congo), high concentrations of copper and cobalt are found in the soils of the well-known “Copper Belt”. Industrial mining and ... [more ▼]

In the south-eastern part of the Katanga Province (Democratic Republic of the Congo), high concentrations of copper and cobalt are found in the soils of the well-known “Copper Belt”. Industrial mining and smelting plants were installed under Belgian colonialism in the area and numerous other international companies have settled there since the end of the 1990s. Due to dominant south-eastern winds, the metallurgic industry in Lubumbashi has been the source of spatially concentrated atmospheric deposits of non ferrous metal particles and associated substances in a cone-shaped zone, situated north-west of the original metal processing site. Though an empiric effect on vegetation had been noticed for decades, it had not been highlighted yet until recently that this was due to the metallurgic activity. The metal processing plant has dramatically reduced its activity after the independence, in 1960, but the results of the colonial period and current activity are still visible today. The existence of this pollution cone has then been evidenced using two different techniques. Firstly, landscape metric comparisons of the vegetation and bare soil patterns in two study areas, one inside the pollution cone and one outside, have been applied on basis of a classified Quickbird satellite image (2005). Secondly, the city perception theory developed by Kevin Lynch has been used and adapted to the pollution issue and the context of developing countries, using trained experts and interviewed citizens. The first method highlighted a higher fragmentation and lower vegetation presence inside the pollution cone, reflecting the negative impact of the atmospheric deposits. Those differences were higher for sites closer to the emission source. Lynch’s approach outlined the negative impact of diverse industrial plants on the perception by the local population. Six pollution districts and several contaminated paths, limits, nodes and polluting landmarks were identified. Those included the recently installed plants to the north and east of the city. Citizens even recognize them as part of the collective image of the city. This has important outcomes, as the demographic pressure in Lubumbashi extended the city limits so that the metal processing plant is now fully included in the urban matrix. Therefore, a part of the local population lives within the pollution cone and faces contamination. Moreover, the rivers flowing near the plant, Kafubu and Lubumbashi, as well as the roads and railways linking different industrial sites are contaminated and represent contamination paths potentially spreading toxic substances all over the area. Sanitary evidences of this contamination have already been found in the area and particularly the pollution cone. Moreover, the recently installed plants, outside of the city, could face the same problems due to urban sprawl in the forthcoming years. This should be taken into account for the urban planning in Lubumbashi. Evidencing the ecological footprint of the non-ferrous mining industry is considered crucial to confront local decision makers with the negative impact of metallurgic industry within an urban context. [less ▲]

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See detailCity pattern as a factor influencing the impact of urbanization on ecosystems - A diachronic analysis of the dynamic of two cities: Kisangani and Lubumbashi (Democratic Republic of Congo)
Andre, Marie ULg; Mahy, Grégory ULg; Lejeune, Philippe ULg et al

Conference (2013, September 06)

The patterns and dynamics of two cities between two years (2002 and 2010 for Kisangani; 2002 and 2008 for Lubumbashi, both part of the Democratic Republic of Congo) have been examined in order to estimate ... [more ▼]

The patterns and dynamics of two cities between two years (2002 and 2010 for Kisangani; 2002 and 2008 for Lubumbashi, both part of the Democratic Republic of Congo) have been examined in order to estimate how they influence the impact of extension and/or of densification on urban internal and peripheral ecosystems. For each city two SPOT 5 images were classified with a oriented-object supervised approach; then composition landscape metrics (built area proportion index, anthropized surface proportion index, equitability index of area proportion of classes, dominant class index, dominant class proportion index) have been evaluated in order to 1) identify the extend of each area (urban, suburban, rural) within the urban-rural gradient, 2) quantify the most commonly cited morphological characteristics to describe these different areas and 3) quantify the dynamic of the different areas during this decade. Landscape ecology assumes that the landscape pattern description is important because, according to the central hypothesis called “pattern-process paradigm”, the ecological processes influence landscape structure and vice versa. Composition metrics, which are commonly used in landscape ecology, describe the pattern among other things in quantifying the presence and the number of patches from the various classes within the landscape. This study singularizes itself from the subjective ones by its quantified and objective approach. The similarities and differences between these cities, relevance and gaps in the method have then been identified and discussed. The results of this study are aimed to be used by urban planners for the evaluation of the potential resistance of internal and peripheral natural ecosystems to the extension and/or the densification of a given city, taking into account its pattern and dynamic. It might help them in their choice between different planning alternatives. [less ▲]

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See detailWorkshop "Non-compliance to the rules and disobedience towards the law"
Lejeune, Aude ULg; García Villegas, Mauricio

Conference (2013, September 06)

Acts of disobedience are increasing today. Dissident behaviors express new types of political commitment and mobilization. Madrid indignant protesters, Arab Spring, Occupy Wall Street are some ... [more ▼]

Acts of disobedience are increasing today. Dissident behaviors express new types of political commitment and mobilization. Madrid indignant protesters, Arab Spring, Occupy Wall Street are some manifestations of this phenomenon. Beside collective movements, other conducts of disobedience are less visible, but equally important; for instance, when a citizen refuses to pay taxes or do not comply with traffic rules or refuses to participate in the election when vote is compulsory. These ordinary conducts are also part of the contestation of social norms and order. In non-democratic or in transition to democracy countries, scholarly works have highlighted how complex the phenomenon of non-compliance with rules is. They have showed the existence of a culture of non-compliance, linked not only to the problem of national State legitimacy but similarly to the influence of other normative orders, such as tradition or religion. Disobedient citizens experience a tension between, on the one side, what they consider as the moral norms or customary rules, and, on the other side, the current legal norms. How these plural normative orders are connected one to each other and how they affect the rule of law and the democratic regimes? Through this workshop, we want to examine how citizens experience the law and the rules in different social and political settings. Crossing different approaches – Sociology, Political science, Law, and Anthropology – allows us to analyze both organized and collective behaviors of disobedience, such as destroying GMO crops or commercial billboards, as well as ordinary and individual conducts of non-compliance to the rules, such as cheating during an exam or breaking the traffic laws. These different forms of disobedience and non-compliance invite us to think about the articulation between individual and collective behaviors (to the extent that each conduct of non-compliance is embedded in a larger social context and contributes, in return, to shape it) and between political and self-interested acts of resistance. The phenomenon of non-compliance to the rules can be analyzed from two perspectives: one, from the point of view of the actor (individual or collective) who are involved; the other from the purposes of action (interest-oriented or value-oriented). By crossing these two focuses, four practices of disobedience can be distinguished: (1) the non-compliance by an individual, as a selfish and interested practice, for example when a driver jumps the lights or when a citizen does not pay taxes; (2) the non-compliance by an individual who thinks the norm is unjust or immoral, for example when a physician does not follow the law in the case of abortion; (3) the non-compliance by a group in order to fulfill its interests, for example the gas smuggling practices on the border between two countries and; (4) the non-compliance by a group on behalf of shared values, for example indignant protesters. These different forms of disobedience and non-compliance to the norms allow us to analyze dissident legal mobilizations and highlight activities which differ from conventional political protestation. Through these questions, we suggest more broadly to examine how ordinary citizens experience the law and the legality and which cultures of legality are constructed in different social and political contexts. In short, the comparative analysis of disobedience practices allows us to think about the relationship between legality and legitimacy and between the law and other normative orders. [less ▲]

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See detailA probabilistic characterization, propagation, and sensitivity analysis of uncertainties in a metal forming application
Arnst, Maarten ULg; Ponthot, Jean-Philippe ULg

Conference (2013, September 05)

In metal forming processes, after leaving the tooling, formed pieces of metal have a tendency to partially return to their original shape because of their elastic recovery. This phenomenon, referred to as ... [more ▼]

In metal forming processes, after leaving the tooling, formed pieces of metal have a tendency to partially return to their original shape because of their elastic recovery. This phenomenon, referred to as the springback, is quite complex and depends not only on material properties such as Young's modulus and yield stress but also on many process parameters such as sheet thickness and bending angles. The springback is difficult to predict and is a major quality concern in forming processes because when the springback is smaller or larger than expected, it can cause serious problems to subsequent assembly processes due to geometry mismatches. In this communication, we present a probabilistic analysis of a metal forming application. We consider the bending of a metal sheet with uncertain elastoplastic material properties. First, we use methods from mathematical statistics to obtain a probabilistic characterization of the elastoplastic material properties from data. Next, we map this probabilistic representation of the elastoplastic material properties into a probabilistic representation of the deformed shape of the metal sheet through a mechanical model implemented using the Metafor software. Finally, we conduct a stochastic sensitivity analysis to determine which elastoplastic material properties are most influential in driving uncertainty in the deformed shape after the springback. Our probabilistic analysis involves so called nonintrusive methods, that is, methods that can be implemented as wrappers around the Metafor software without requiring modification of its source code. Further, it includes recent methods for the propagation and sensitivity analysis of uncertainties characterized by arbitrary probability distributions that may exhibit statistical dependence. [less ▲]

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See detailRenewal of Walloon suburban neighbourhoods
Marique, Anne-Françoise ULg

Conference (2013, September 05)

This paper addresses the challenges, transformations and conditions of a sustainable suburban transition in Wallonia (Belgium). Two powerful levers are used: (1) urban form, which is considered in ... [more ▼]

This paper addresses the challenges, transformations and conditions of a sustainable suburban transition in Wallonia (Belgium). Two powerful levers are used: (1) urban form, which is considered in addition to the individual building scale, and (2) mobility, because sprawl spatially separates activities, resulting in an increase in travel distances and energy used in transportation. Three scenarios focused on the evolution of the existing building stock are modelled and assessed (the retrofitting of existing neighbourhoods, an increase in the built density and demolition / reconstruction) to answer two main questions: "how to intervene in suburban areas?" and" where to intervene? ". [less ▲]

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See detailCareer Patterns in Multi-level Systems. A Survival Analysis of Political Careers in Catalonia, Quebec, Scotland, and Wallonia.
Dodeigne, Jérémy ULg

Conference (2013, September 05)

With the process of regionalisation in formerly unitary democracies, there is a renewed interest for conceptual and empirical studies on political careers. Not only in new federal political systems, but ... [more ▼]

With the process of regionalisation in formerly unitary democracies, there is a renewed interest for conceptual and empirical studies on political careers. Not only in new federal political systems, but also in established federations. Yet, critical questions remain unsolved on both methodological and empirical aspects. This proposal seeks to provide original answers based on a comparative analysis of four regions from established and new federal systems: Catalonia in Spain, Quebec in Canada, Scotland in the UK and Wallonia in Belgium. The paper proceeds in two stages. From a methodological view, even though current research analyse individual trajectories, they do not take individual careers but predominantly inter-territorial movements as the unit of analysis. This paper demonstrates that an individual approach – following every single trajectory over time and across territories – is a better unit of analysis to uncover all career patterns. Based on a “survival analysis” of 2.443 careers, a quantitative analysis tests several hypotheses to explain the variations in career patterns across regions. Two covariates of interest are more particularly tested: the effect of former regional/national experience on political career; the differences of survival rates at the regional and national levels between regionalist and national parties. [less ▲]

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See detailExperimental Validation of a Thermal Model of a LOx Flooded Ball Bearing
Servais, Christophe ULg; Bozet, Jean-Luc ULg; Kreit, Patrick ULg et al

Conference (2013, September 05)

Ball bearings of turbopumps of rocket engines work in very singular conditions; they are flooded into liquid oxygen or liquid hydrogen. Therefore, the use of any conventional lubricants (oil or grease) is ... [more ▼]

Ball bearings of turbopumps of rocket engines work in very singular conditions; they are flooded into liquid oxygen or liquid hydrogen. Therefore, the use of any conventional lubricants (oil or grease) is proscribed. Although cryogenic fluids can cool this kind of ball bearing, they cannot separate the surfaces in contact. As a result, there is a significant increase in frictional power losses. This paper presents tests performed on a cryotechnic ball bearing flooded in liquid oxygen. The test results showed that beyond a critical loading of the bearing, a sudden increase in temperature occurred. A thermal model is also put forward, in order to understand and anticipate especially the thermal instability described above. [less ▲]

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See detailStructural characterization of disulfide-bridged-peptides by a combined use of ETD, CID and Ion-Mobility mass spectrometry
Massonnet, Philippe ULg; Upert, Gregory; Pastor, Alexandra et al

Conference (2013, September 05)

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See detailTowards a (New) Mode of Organizational Regulation in Belgian Schools? Some Empirical Accounts of Mediation Practices and Devices
Dubois, Christophe ULg; Dethier, Baptiste ULg

Conference (2013, September 04)

Considering mediation in general as a new mode of social regulation (Bonafé-Schmitt, 1996 ; Volckrick, 2005), we can consequently conceive school mediation as a new mode of organizational regulation ... [more ▼]

Considering mediation in general as a new mode of social regulation (Bonafé-Schmitt, 1996 ; Volckrick, 2005), we can consequently conceive school mediation as a new mode of organizational regulation (Reynaud, 1988; Friedberg, 1993). Nevertheless, it is necessary to account for the concrete practices and devices through which school mediation becomes visible and recovers a concrete social form (Simmel, 1999). In doing so, we will consider mediation as a set of concrete solutions designed to solve local problems. With this in mind, this presentation will precisely aim at reporting and depicting concrete school mediation situations, through a double movement of decomposition and re-composition (Latour, 2010) settled in an experimental research method. This study takes place in a doctoral research program introduced in 2011 (Kuty et al., 2012). It is based on fifty semi-directive individual interviews and sixteen collective interviews, led within six secondary schools in French-Speaking Belgium. [less ▲]

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