Stochastic Dimension Reduction of Multi Physics Systems through Measure Transformation

Conference (2013, February 26)

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 ▲]

Les problèmes cutanés liés aux médicaments

Conference (2013, February 25)

Débats européens sur les formes de la vie marine au Siècle des Lumières

Conference (2013, February 22)

Le tutorat: pour un accompagnement réflexif et interactif centré sur l'étudiant / Développer des compétences de tuteur dans un modèle socioconstructiviste et interactif

Conference (2013, February 22)

Public: 300 personnes de tout secteur d'activité des établissements sanitaires et sociaux Présentation de deux interventions ayant pour objectifs: - Une présentation interactive (60')des grands concepts ... [more ▼]

Public: 300 personnes de tout secteur d'activité des établissements sanitaires et sociaux Présentation de deux interventions ayant pour objectifs: - Une présentation interactive (60')des grands concepts liés à l'agir avec compétences et à l'accompagnement au développement de compétences dans un modèle socioconstructiviste et interactif - une présentation pour faire émerger les "nouvelles" compétences du tuteur en stage. A partir d'une vidéo pour amener à l'analyse de la pratique, la pratique réflexive, l'entretien et le questionnement. Un état des lieux au niveau européen est présenté et les perspectives associées à cette problématique sont discutées. [less ▲]

Effects of 3 months of controlled whole body vibrations with low exposure period on the risk of falls among nursing home residents

in Proceeding of the meeting (2013, February 22)

Femina chez Sénèque : apports et limites de la statistique textuelle

Conference (2013, February 21)

Video multitracking and study of the collective behaviour in tadpoles

Conference (2013, February 21)

How Teachers Initial Training and Classroom Practices Improve Reading Engagement and Achievement

Poster (2013, February 20)

La lutte contre le racisme et le Centre pour l’égalité des chances : défis et perspectives

Conference (2013, February 15)

Diálogo entre un poeta medieval y una obra aurisecular: Antón de Montoro a partir de "La Lozana Andaluza" de Francisco Delicado

Conference (2013, February 13)

Entre los múltiples juegos intertextuales del Retrato de la Lozana andaluza, obra del presbítero Francisco Delicado publicada en 1528 en Venecia, están bien representados los autores del siglo XV y sus ... [more ▼]

Entre los múltiples juegos intertextuales del Retrato de la Lozana andaluza, obra del presbítero Francisco Delicado publicada en 1528 en Venecia, están bien representados los autores del siglo XV y sus obras, a los que se refiere mediante sencillas menciones, citas o aun a través de una reescritura. Así, tanto los textos de Fernando del Pulgar como La Cárcel de amor de Diego de San Pedro o La Celestina de Fernando de Rojas constituyen parte de los hipotextos que pueblan el mundo variopinto de la cortesana andaluza que nos retrata Delicado. Ahora bien el poeta cancioneril converso Antón de Montoro (¿1404-1477?) sobresale dentro de esta pléyade, aunque no por la frecuencia de las alusiones a esta figura, pues éstas se reducen a una única mención del poeta mediante su apodo « El Ropero », sino más bien por la peculiaridad del contexto en el que se inserta esta mención, entre alusiones a Séneca, Lucano y Marcial. Nuestra comunicación pretende demostrar que esta presencia del cordobés cuatrocentista caracterizado por su agudeza verbal entre los mamotretos del siglo XVI no se reduce a una sencilla intrusión entre autores clásicos en son de burla. Correrá a nuestro cargo determinar en qué medida ciertas afinidades, de índole estética y temática, que comparten Montoro y Delicado podrían explicar la mención de aquél por éste en tan halagador entorno textual. Ahora bien, destacar los principales puntos de contacto entre La Lozana del autor aurisecular y la figura del Ropero de hecho nos permitirá perfilar la peculiaridad del estatuto social de Antón de Montoro y de su quehacer poético. [less ▲]

What is the potential increase in the heart graft pool by cardiac donation after circulatory death?

Conference (2013, February 09)

On-line flow cytometry profiling of Escherichia coli stress response

Conference (2013, February 08)

Renal function following transplantation with kidneys from donation after brain death (DBD) or cardiac death (DCD)

Poster (2013, February 08)

Functional screening of a metagenomic library from algal biofilms

Conference (2013, February 08)

Macroalgae, and particularly their lignin-free polysaccharides, are increasingly used for their gelling and therapeutic properties and for the production of biofuels and renewable chemical compounds. To ... [more ▼]

Macroalgae, and particularly their lignin-free polysaccharides, are increasingly used for their gelling and therapeutic properties and for the production of biofuels and renewable chemical compounds. To extract, hydrolyze and purify this biomass, algae hydrolyzing enzymes are needed. Our work aims to identify and characterize algal biomass hydrolyzing enzymes expressed by microorganisms living on the surface of algae, by functional metagenomics. Therefore, a microbial DNA extraction method was developed to isolate the gDNA from the microorganisms of the brown algae Ascophyllum nodosum and a metagenomic library was constructed in Escherichia coli. The library was screened for diverse enzymatic activities (esterases, xylanases, cellulases, α-amylases, arabinanases, caseinases and β-glucosidases) on agar plates with specific enzymes substrates. Several new microbial enzymes (esterases, β-glucosidases, α-amylases and cellulases) were identified revealing the wealth of our library. Furthermore, those enzymes had less than 50% sequence identity with known protein sequences; meaning that our approach allows to identify new microbial enzymes expressed by uncultured microorganisms. Plate tests for medium-throughput screening of specific enzymes hydrolyzing algal polysaccharides (agarases, carrageenases and alginate lyases) are currently being developed. Our approach will probably allow us to identify new families of those ill-known enzymes, with particular enzymatic activities. [less ▲]

Delayed graft function (DGF) does not harm the results of controlled donation-after-cardiovascular death (DCD) in kidney transplantation.

Poster (2013, February 08)

Is ultra-short cold ischemia the key to IBDL avoidance in DCD-LT?

Poster (2013, February 08)

Impact of the depth on bacterial diversity in an agricultural soil

Poster (2013, February 08)

Bacteria are the most abundant and diverse microorganisms in soils. They play an important role in soil formation, contribute to plant nutrition and are involved in various processes in agroecosystems ... [more ▼]

Bacteria are the most abundant and diverse microorganisms in soils. They play an important role in soil formation, contribute to plant nutrition and are involved in various processes in agroecosystems such as nutrient cycling. The aim of this study was to evaluate the impact of the depth on bacterial diversity and quantity in an agricultural soil. Samples was collected on May 2011 and May 2012 at three different depths : 10, 25 and 45 centimeters. The quantity of total bacteria was measured by real time PCR and the analysis of the diversity was performed by the high throughput sequencing technology. Results obtained by these methods show that the biomass and the bacterial quantity and diversity (Shannon index) decrease with the depth, particularly at 45 centimeters. The biomass is, in average, 6.5 fold less important at 45 cm than at 10 cm and the quantity is 17 fold lower at 45 cm than at 10 cm. Our results also indicate that many taxa, such as Betaprotebacteria, Deltaproterobacteria, Gammaproteobacteria, Acidobacteria and Burkholderiales are influenced by the depth. The results will be presented in more details on the poster. [less ▲]

Occurence and detection of satellite RNAs associated with cucumber mosaic cucumovirus isolated from banana (Musa, AAA genomic) in Ivory Coast

Poster (2013, February 08)

Functional screening of a metagenomic library from algal biofilms

in Smagghe, Guy; Boeckx, Pascal; Bossier, Peter (Eds.) et al Communications in Agricultural and Applied Biological Sciences (2013, February 08)

Macroalgae, and particularly their lignin-free polysaccharides, are increasingly used for their gelling and therapeutic properties and for the production of biofuels and renewable chemical compounds. To ... [more ▼]

Macroalgae, and particularly their lignin-free polysaccharides, are increasingly used for their gelling and therapeutic properties and for the production of biofuels and renewable chemical compounds. To extract, hydrolyze and purify this biomass, algae hydrolyzing enzymes are needed. Our work aims to identify and characterize algal biomass hydrolyzing enzymes expressed by microorganisms living on the surface of algae, by functional metagenomics. Therefore, a microbial DNA extraction method was developed to isolate the gDNA from the microorganisms of the brown algae Ascophyllum nodosum and a metagenomic library was constructed in Escherichia coli. The library was screened for diverse enzymatic activities (esterases, xylanases, cellulases, α-amylases, arabinanases, caseinases and β-glucosidases) on agar plates with specific enzymes substrates. Several new microbial enzymes (esterases, β-glucosidases, α-amylases and cellulases) were identified revealing the wealth of our library. Furthermore, those enzymes had less than 50% sequence identity with known protein sequences; meaning that our approach allows to identify new microbial enzymes expressed by uncultured microorganisms. Plate tests for medium-throughput screening of specific enzymes hydrolyzing algal polysaccharides (agarases, carrageenases and alginate lyases) are currently being developed. Our approach will probably allow us to identify new families of those ill-known enzymes, with particular enzymatic activities. [less ▲]

CHARACTERIZATION OF AGRICULTURAL SPRAY BY DIGITAL ANALYSIS OF SHADOWGRAPHY IMAGES

Poster (2013, February 08)

Agricultural sprays are among the most common two-phase flows studied because their characteristics determine the efficiency of treatment as well as environmental contamination. At present, the relevance ... [more ▼]

Agricultural sprays are among the most common two-phase flows studied because their characteristics determine the efficiency of treatment as well as environmental contamination. At present, the relevance of different characterization techniques of the highly polydispersed sprays used in this application remains controversial. Digital analysis of shadowgraphy images presents an attractive option for the characterization of both velocity and size of droplets present in the spray. This study presents an overview of the contrast problems inherent in the use of backlighted images and propose appropriate solution to ensure the quality of measurements. Generally, background light presents heterogeneities associated with light sources and optical arrangement. These can be solved by substracting from each images a composite background. An other particular focus is given to one major drawback of volumetric lighting, the presence of out focus droplets. These droplets have to be removed during the image analysis process because the measurement of their diameters can't be done accuratly. The rejection of these out of focus objects is based on a quantitative parameter which was calibrated with a obliquely shot monodispersed spray. The final step of the image processing is determining velocity of the droplet by tracking a same droplet on two successive images. The tracking algorithm is based on the size of the droplet, its more probable displacement and its direction. [less ▲]

Petrographical differentiation between Palaeozoic oolitic ironstones from France, Belgium and Germany and application to the provenance study of archaeological artefacts – preliminary results

Conference (2013, February 07)

Samples of Palaeozoic oolitic ironstone beds susceptible of having being used as raw materials for Neolithic red ochres, have been petrographically investigated. The preliminary results of this first ... [more ▼]

Samples of Palaeozoic oolitic ironstone beds susceptible of having being used as raw materials for Neolithic red ochres, have been petrographically investigated. The preliminary results of this first comparative analysis are quite encouraging: microfacies differences have been observed between Ordovician oolitic ironstones from Normandy (France), late Upper Devonian oolitic ironstones from Belgium and uppermost Lower Devonian to lowermost Middle-Devonian (Emsian-Eifelian) oolitic ironstones from the Eifel area (Germany). Petrographical differentiation is based upon contrasting grain size, mineralogy (hematite/chlorite ratio) and typology of the ferruginous ooids, besides differences in mineralogy, diagenetic history and lithologic nature of the host sediments. Most conspicuous are differences in ferruginous ooid typology, including “true” concentric ooids, superficial ooids, algal oncoids and pseudo-ooids (ferruginized cortoids and rounded bioclasts). “Flax seed” or Clinton-type iron ores (rich in flattened ooids) and “fossil iron ores” (essentially composed of ferruginized bioclasts) can be identified as well as transitional or mixed types. Homogenous and well-sorted, often flattened and fine-grained ferruginous “true” ooids (flax seed ore) with alternating hematite and chlorite cortices in a sideritic- chloritic or fine siliciclastic matrix, are characteristic for the Ordovician (Llanvirn) oolitic ironstones of Normandy (basal part of the Urville Shales). Locally, weathered levels exist, enclosing limonitic (goethitic) crusts. Medium-sorted, fine-to coarse- grained ferruginous hematitic pseudo-ooids (ferruginized bioclasts) in a bioclastic limestone matrix (fossil ore) characterize the Lower-Middle Devonian boundary oolitic ironstone beds (Heisdorf and Lauch Formations, Eifel Synclines). Finally, well- to medium-sorted heterogenous, fine- to medium-grained, pure or mixed flax seed- and fossil ore-type hematitic oolitic ironstones in siliclastic and/ore carbonate matrices, characterize the Belgian Latest Upper Devonian (Famennian) ironstone deposits (Hodimont Formation, Famenne Shales Group). Several stratigraphic levels do exist within the Lower Famennian and basal part of the Upper Famennian in the Namur, Dinant and Vesdre Synclinoria, but the lowermost Famennian one is the only level that has been mined. Within some of the younger Famennian oolitic ironstone levels, proximal and distal facies can be distinguished on the basis of microfacies differences and mineralogy of the ferruginous pseudo-ooids. Only the proximal hematitic facies of the lowest stratigraphical oolitic ironstone level (level I) is supposed to have been used in prehistoric times for the manufacturing of ochre. Diagenetic sideritization and dolomitization, particle deformation as well as sulphide mineralizations, affect most of the studied oolitic ironstones. However, the intensity of these mineralizations varies strongly (even within the same deposit) and depends on local tectonics. A distinction can be made between the Emsian-Eifelian and Famennian fossil iron ores, based on the nature of the bioclasts and other ferruginzed components). Eifelian oolitic ironstones contain ferruginized crinoids, bryozoans, trilobites, brachiopods, goniatites besides ferruginized siliciclastic intraclasts, whereas the Famennian ones are dominated by ferruginous ooids and algal oncoids, mixed with ferruginized bioclasts including crinoids, bryozoans, brachiopods, ostracods, algae and incertae sedis, and locally intraclasts (ferruginized stromatolitic crusts). Distal facies contain slightly Fe-impregnated bioclasts only such as crinoid ossicles and display a higher chlorite/hematite ratio. Thin sections have been made in archeological objects (red ochre), allowing a first comparative petrographical analysis indicating their probable geological and geographical provenance. References Ph. Joseph, 1982. Le minerai de fer oolithique Ordovicien du Massif Armoricain: sédimentologie et paléogéographie. Thèse présentée à l’Ecole Nationale Supérieure des Mines de Paris. 325 p. R. Dreesen, 1989. Oolitic ironstones as event-stratigraphical marker beds within the Upper Devonian of the Ardenno-Rhenish Massif, in: Young, T.P. & Taylor, W.E.G. (eds), Phanerozoic Ironstones. Geological Society Special Publications, n°46, pp. 65-78 Rath, S., 2003. Die Erforschungsgeschichtede Eifel-Geologie. Ph.D. Dissertation, Rheinisch- Westfälische Technische Hochschule Aachen, 239 p. [less ▲]

Neanderthals see red : production of red powder in the Late Mousterian in Ormesson, France

Poster (2013, February 07)

Les Bossats, near Ormesson, is a newly discovered late Mousterian site dated around 47.000 B.P. by thermoluminescence. The archaeological level, fossilized by loess, revealed a rich industry based on the ... [more ▼]

Les Bossats, near Ormesson, is a newly discovered late Mousterian site dated around 47.000 B.P. by thermoluminescence. The archaeological level, fossilized by loess, revealed a rich industry based on the discoide mode, associated with numerous fragments of red iron-rich rocks. The geological sources were identified by means of SEM-EDX, XRD, Raman spectroscopy, PIXE and by petrographical observation of thin sections. The past mechanical and morphological modifications of the pigment blocks were characterized by macro-photography, microscopy and topographical micro- measures of the used surfaces. It was thus possible to demonstrate that the colouring materials were selected in the neighbouring by the Neanderthals. Fourteen blocks and fragments show different use wears such as facets, grooves and scars. The Neanderthals implemented numerous techniques in order to produce preferentially red powder. The archaeological remains reveal an organized and versatile processing sequence of red ferruginous materials. During the late Mousterian a great phenomenon in expansion in western Europe is remarkable by the much wider exploitation of mineral red and black materials corresponding to technical modifications and divers utilizations under development. [less ▲]

Geological record and sedimentology of the Palaeozoic oolitic ironstone deposits in Western Europe. Spatial relationships with the Linienbandkeramik settlements (LBK) in Belgium.

Conference (2013, February 07)

Mined since prehistoric times, oolitic ironstones (OIS) were a very important world source of iron from 1850 to 1945: hereafter they have been progressively replaced by the Precambrian Banded Iron ... [more ▼]

Mined since prehistoric times, oolitic ironstones (OIS) were a very important world source of iron from 1850 to 1945: hereafter they have been progressively replaced by the Precambrian Banded Iron- Formations (BIF). OIS are iron-rich sedimentary rocks bearing ferruginous ooids. They consist of at least 15% iron. In Western Europe, their overall depositional environment is that of a shallow shelf, most often located close to the transition from non-marine to marine environments. Their main age range is concentrated within the Ordovician through Devonian and the Jurassic through Paleogene. Proterozoic occurrences are known but these occur outside Europe. The host rocks of the ironstones are predominantly clastic, whereas the host sediment of the ferruginous ooids can be either clastic or carbonate or both. The OIS occur at the top of coarsening and shoaling upward cycles. They represent condensed deposits and transgressive system tracts. Numerous oolitic ironstone deposits are interpreted as tempestites or as intertidal deposits. It is generally agreed that ferruginous ooids formed in shallow marine water conditions, near the water-sediment interface, with repeated reworking of the sediment. Such an environment implies oxidizing conditions, the sedimentary iron being in the ferric state. The exact source of the iron is still a matter of discussion and speculation, just as the primary or secondary origin of the ferruginous ooids. Besides hematite (or goethite), also siderite, Fe-dolomite and berthierine/chamosite are present in the OIS as iron-bearing minerals. Due to weathering processes the carbonate matrix is often removed, the iron is released and oxidized, whereas the ferrous silicates are converted into ferric oxides or ferric hydroxides. Many old mining activities are based on occurrences of this weathered ore. The latter material has also strong staining properties. 1. Germany OIS are outcropping in the Eifel area. The latter is part of the Ardenno-Rhenish Massif and lies in the eastern extension of the Neufchateau Synclinorium, south of the Ardenne Anticlinorium (enclosing the Cambro-Ordovician Stavelot-Venn inlier). The general structure of the Eifel corresponds to an intensively folded and faulted synclinorium In the center of this synclinorium, outcrops of OIS occur on both flanks of successive synclines that are individually named (from the north to the south): the Sötenicher Mulde, the Blankenheimer Mulde the Rohrer Mulde, the Dollendorfer Mulde, the Ahrdorfer Mulde and the Hillesheimer Mulde. Two important stratigraphic levels with IOS are known and they coincide more or less with the Lower-Middle Devonian boundary (Uppermost Emsian- Lowermost Eifelian). These OIS represent excellent marker beds for geological mapping. 2. The Netherlands There is no outcrop of OIS in this country. 3. Belgium Oolitic iron ores were formed during different periods in Belgium: the Lochkovian (Lower Devonian, Dinant Synclinorium, restricted to the Belgian-French border), the Givetian (Middle Devonian, Dinant Synclinorium), the Frasnian (Upper Devonian, Dinant Synclinorium), the Famennian (Upper Devonian, Namur S., Dinant S. & Vesdre S.) and the Toarcian-Aalenian (Jurassic, Lorraine area, Paris Basin – called “minette ore”). The most important OIS level is the Lower Famennian one. It has been intensively mined until the middle of the 20th century, essentially in the Namur Synclinorium, between the cities of Namur and Huy. In this area, its important thickness (until 1.85m) and the number of layers triggered the development of an important economic activity. Outcrops were restricted to the tributaries of the Meuse River. The Famennian oolitic ironstone facies change from north to south by a gradual decrease in the number of layers, in their thickness, grain size, ooid concentration, clast size and iron content. They represent also excellent lithostratigraphical marker beds. The clay-dolomitic matrix is being progressively replaced by a calcitic cement. The other Devonian OIS levels are not of great economic importance, they were only mined locally, to supply smith’s working places. Due to surface mining, outcrops are now very rare, and often indicated by a light depression in the topography only. 4. Grand-Duchy of Luxembourg OIS are restricted to the Jurassic (Aalenian-Lower Bajocian) in the NW part of the Paris Basin. This essentially goethitic ore (“minette”) was intensively mined in the three adjacent country borders area (FR-BE-LU). No OIS levels in the Lower Devonian are outcropping in the northern part of the Grand Duchy. 5. France Numerous OIS layers are known in France at several stratigraphical levels, but a lot of them cannot be considered as a real ore. Paleozoic OIS belonging to the Armorican Massif were mined in the Normandy area (Urville Fm, Llanvirn, Middle Ordovician) and in the Bretagne area (Arenig, Lower Ordovician). In Normandy, OIS do outcrop inside several synclines (e.g. May and Urville Sy.), as one thick composite layer.  The spatial relationships of the different oolitic ironstone levels with the Linienbandkeramik settlements (LBK) in the studied area, will be presented. [less ▲]

An adaptive large neighborhood search for a vehicle routing problem with multiple trips and driver shifts

Conference (2013, February 07)

Applications of the concept of Prevalence: Nowhere analytic functions and Multifractal analysis

Conference (2013, February 07)

Prévalence des cas de lymphadénite granulomateuse sous‐maxillaire chez des porcs abattus en Belgique

Poster (2013, February 06)

In pigs the Mycobacterium avium complex (MAC) causes granulomatous lymphadenitis. Carcasses with such lesions must be detected, as parts of the affected carcasses and organs have to be condemned. These ... [more ▼]

In pigs the Mycobacterium avium complex (MAC) causes granulomatous lymphadenitis. Carcasses with such lesions must be detected, as parts of the affected carcasses and organs have to be condemned. These nontuberculous mycobacteria are opportunistic pathogens which have acquired an increasing importance in public health in recent decades due to their ability to cause lung diseases, lymphadenitis in children and systemic infections in immunocompromised patients ‐ even if the potential risk of infection of an immunocompromised person by MAC in the consumption of undercooked pork still has to be determined. The first objective of this study was to evaluate the prevalence of submandibular granulomatous lymphadenitis in pigs slaughtered in Belgium. Between August 2010 and September 2011, 16,211 carcasses were inspected by the same veterinarian in 2 slaughterhouses – one in Flanders, the other in Wallonia. Eighty‐six suspected cases of submandibular granulomatous lymphadenitis (0.53% of pigs; 95% Confidence Interval: 0.42‐0.65%) were identified, collected and submitted to histopathological (Ziehl‐Neelsen and haematoxylin‐eosin staining) and bacteriological (culture, PCR, molecular typing) tests. The second objective of the study was to characterize lesions and to identify the relative importance of MAC and Rhodococcus equi to explain the lesions. Mycobacterium avium subsp. hominissuis (MAH) was isolated from 6 lymph nodes (7.0%; 95% CI: 2.6‐14.6%) and Rhodococcus equi from 45 (52.3%; 95% CI: 41.3‐63.2%). The final objective of the study consisted in farm investigation to evaluate the possible source of contamination of pigs by MAH. Potential sources such as sawdust, water, wild birds and/or cattle were identified. [less ▲]

Applications of the concept of prevalence: Nowhere analytic functions and multifractal analysis

Conference (2013, February 05)

Comment les circuits « alternatifs » de consommation alimentaire s’intègrent-ils dans une dynamique durable, incluant dimensions sociales, économiques et environnementales? Le cas des GAC et du Commerce équitable.

Conference (2013, February 01)

Cette contribution interroge l’existence d’un référentiel critique et argumentatif commun à des initiatives d’Economie Sociale. En utilisant l’appareillage théorique de la « sociologie des épreuves », les ... [more ▼]

Cette contribution interroge l’existence d’un référentiel critique et argumentatif commun à des initiatives d’Economie Sociale. En utilisant l’appareillage théorique de la « sociologie des épreuves », les propos de GACEURS et de bénévoles/salariés du commerce équitable seront analysés afin de voir si le concept de Développement Durable porte en lui un projet sociétal, un référentiel fédérateur, apte à mobiliser des consom’acteurs autour de revendications partagées. [less ▲]

Children’s Knowledge About Memory: Adaptation and French Validation of a Scale to Assess it.

(2013, February)

The present study aimed at adapting and testing a French version of Kreutzer et al.’s metamemory interview (1975) in a group of 128 children aged of 4, 6, 9, and 12. Following Fritz et al. (2010 ... [more ▼]

The present study aimed at adapting and testing a French version of Kreutzer et al.’s metamemory interview (1975) in a group of 128 children aged of 4, 6, 9, and 12. Following Fritz et al. (2010), adjustments have been made to reduce language skill contamination as well as to increase the developmental appropriateness and sensibility of the scale. Results show the emergence of two sub-scales (“strategy knowledge” and “general memory knowledge”) on the factor analysis and reveal an excellent interrater reliability as well as a good internal consistency for the global scale and two sub-scales (respectively, Cronbach α = .79; .81 and .71). As expected with regard to the literature, a significant correlation has appeared between the metamemory scale and short-term memory capacities (convergent validity). Similarly, the metamemory score has shown its ability to predict children memory performance (predictive validity). Finally, the lack of correlation between most of the scale’s items and vocabulary measurement (Peabody Picture Vocabulary Test) and the very good ability of the scale to distinguish between age groups demonstrate that the adaptations made to improve the Kreutzer et al.’s scale in terms of language’s contamination and developmental sensibility have reached their goal. Regarding its psychometric properties, these results suggest that this interview can be considered as a useful and reliable tool for developmental research. Furthermore, they confirm the importance of metamemory knowledge in memory performance. Future studies will have to be carried out to show the utility of this scale in a clinical population. [less ▲]

Development of an experimental device allowing plant-plant interaction studies and in situ dynamic trapping of volatile organic compounds emitted by barley (Hordeum distichon L.) roots

in Communications in Agricultural and Applied Biological Sciences (2013, February), 78(1), 97-102

In response to wounding or herbivore attack, leaves and roots of higher plants release volatile organic compounds (VOCs). To date, VOCs analysis and plant−plant interaction studies have been mainly ... [more ▼]

In response to wounding or herbivore attack, leaves and roots of higher plants release volatile organic compounds (VOCs). To date, VOCs analysis and plant−plant interaction studies have been mainly performed on aboveground plant tissues, leaving the roles played by root VOCs in plant−plant interaction unexplored. In this context, this project aims at setting up an original experimental device allowing both dynamic trapping of VOCs emitted by mechanically damaged H. distichon roots and the study of the roles played by root VOCs in intra and interspecific plant−plant interactions. The experimental device consists of Barley seedlings cultivated in closed PTFE reactors filled with wet sand. Before being analysed by gas chromatography−mass spectrometry, root VOCs are trapped via a dynamic system on Tenax cartridges using a charcoal-filtered and humidified air. Preliminary results show that 7 day-old wounded Barley roots emit C9 fatty acid derivatives (E-non-2-enal and nona-2,6-dienal) as major compounds, contrasting with aboveground plant tissues that mainly emit C6 alcohols, aldehydes, and their derivative esters. For plant−plant interaction studies, receiver plants are exposed to an airflow enriched with VOCs from root damaged Barley plants of the same age. [less ▲]

Long term measurements of volatile organic compounds exchanges above a maize field at Lonzee (Belgium)

in Communications in Agricultural and Applied Biological Sciences (2013, February), 78(1), 127-132

VOC (volatile organic compounds) include a wide set of molecules which are mostly emitted by the plants. Atmospheric scientists are strongly interested in these compounds because of their important role ... [more ▼]

VOC (volatile organic compounds) include a wide set of molecules which are mostly emitted by the plants. Atmospheric scientists are strongly interested in these compounds because of their important role in the atmospheric chemistry and their final impact on air pollution and climate change. Evaluation of current and future VOC emissions is thus necessary and requires a comprehensive understanding of VOC production and exchange dynamics under a wide panel of climatic conditions and ecosystems. Forest and non pastured grasslands have been largely studied for the last decade. However, knowledge about VOC fluxes from croplands remains scarce. Our study focuses on the VOC exchanges between a maize field and the atmosphere. It is incorporated in a wider project that aims to study VOC fluxes from two croplands (maize and winter wheat) and a pastured grassland. VOC fluxes have been measured on a maize field during the whole growing season using a micrometeorological method (eddy covariance). While first results show half-hourly bidirectionnal exchanges among all the preselected compounds, in average methanol stands for the greatest emitted VOC, followed by green leaf volatiles, and acetic acid is the greatest taken up VOC. Small isoprene and monoterpenes fluxes are also observed. A diurnal pattern is found for all those VOC, with greater emission/uptake during the day, suggesting a flux dependence on environmental parameters. These environmental controls will be further investigated [less ▲]

La transition des territoires périurbains vers un modèle plus durable : perspectives pour le renouvellement périurbain.

in Van Ypersele, Jean-Pascal; Hudon, Marek (Eds.) 1er Congrès interdisciplinaire du Développement Durable : Quelle transition pour nos sociétés ? Thème 3 : Logement et Aménagement du territoire. Recueil. (2013, February)

L’article aborde la question du recyclage des quartiers périurbains existants sous l'angle énergétique. Deux leviers d’actions sont mobilisés à cet effet : la forme urbaine, qui est étudiée en ... [more ▼]

L’article aborde la question du recyclage des quartiers périurbains existants sous l'angle énergétique. Deux leviers d’actions sont mobilisés à cet effet : la forme urbaine, qui est étudiée en complémentarité de l’échelle du bâtiment individuel, et la mobilité, car l’étalement urbain est entretenu et favorisé, en grande partie par la dépendance à la voiture individuelle. Deux indicateurs principaux (les besoins de chauffage de différents types de formes périurbaines et un indice de performance des déplacements) sont développés et discutés pour mettre en évidence les scénarios de renouvellement les plus adaptés et répondre à deux questions : « comment intervenir dans les quartiers périurbains existants ? » et « où intervenir ? ». Des pistes concrètes visant à l’opérationnalisation d’un « renouvellement périurbain » plus durable sont ensuite proposées. [less ▲]

Sur la voie de l’élevage laitier de précision en Wallonie - 2. ValLait, OptiVal et OptiVal+ : valoriser des données du contrôle des performances

in 18ème Carrefour des Productions agricoles: Nouvelles approches pour une optimisation de nos élevages laitiers (2013, February)

Prevalentie van eenzaamheid bij 65-plussers in België

Poster (2013, February)

Contexte géologique des sites mésolithiques de la Heid de Fer et de L’Ourlaine à Becco (Theux, Belgique)

in Autour de l'hématite - Circulation et transformation au cours de la préhistoire récente. Méthodes d'analyse (2013, February)

The use of natural resources is a major source of information to study the socio-economic organization of the population from Prehistory to Antiquity, due to the fact that their exchange networks and ... [more ▼]

The use of natural resources is a major source of information to study the socio-economic organization of the population from Prehistory to Antiquity, due to the fact that their exchange networks and behaviors changed together with their lifestyles and know-how. If flint or other materials such as shale have been extensively studied, haematite, and particularly the oolitic haematite, remains hardly investigated as a material in terms of its origin and technical methods of utilization. The mesolithic sites of "L'Ourlaine" and the "Heid de Fer" (Becco, Theux, southern Belgium) are very close to an important Famennian (Upper Devonian) oolitic haematite outcrop. [less ▲]

Pentecostalism and Politics in Congo (DRC): Pentecotization of the Political Field or Political Liturgies’ Legacy

Conference (2013, February)

Therapeutic Strategy and Patient Outcome during the First 2 Years of Pediatric Crohn’s Disease

in Acta Gastroenterologica Belgica (2013, February)

Development of a test to assess the Banana Bunchy Top Virus transmissibility through direct analysis of its aphid vector Pentalonia nigronervosa

in Communications in Agricultural and Applied Biological Sciences (2013, February), 78(1), 49-54

Etude de la variabilité des aptitudes à la transformation laitière en Région wallonne basée sur l'utilisation de la spectrométrie infrarouge

in 18ième Carrefour des Productions animales : Nouvelles approches pour une optimisation de nos élevages laitiers (2013, February)

How democracies deal with disasters. A comparison between the 3.11 disaster in Japan and the Katrina disaster in the U.S

Conference (2013, January 31)

Projets éoliens en Région wallonne : quand le processus décisionnel met à mal l’acceptabilité locale.

Conference (2013, January 31)

Alors que l’énergie éolienne bénéficie du soutien de la population dans les pays européens (Wolsink, 2007b), de nombreuses études notent l’existence de groupes d’opposition structurés et actifs au niveau ... [more ▼]

Alors que l’énergie éolienne bénéficie du soutien de la population dans les pays européens (Wolsink, 2007b), de nombreuses études notent l’existence de groupes d’opposition structurés et actifs au niveau local, près des projets de parcs ou des parcs existants (Breukers & Wolsink, 2007). La Belgique et plus précisément la Région wallonne ne semblent pas déroger à ces observations. En effet, la population wallonne dans un récent sondage IPSOS (2010), montre un soutien relatif à l’énergie éolienne (86% des riverains d’un parc éolien se montrent favorables à l’énergie éolienne). Pourtant les promoteurs éoliens wallons et les décideurs publics font aussi état de façon paradoxal des limites de cette adhésion sociale par la rencontre de groupes d’opposants organisés ou des riverains des communes concernées capables d’influencer l’issue du projet. De là, on observe l’intérêt des différents acteurs pour le citoyen et son intégration dans le processus de décision. Ceci se traduit comme tel : l’intérêt du promoteur privé pour les citoyens résulte d’un constat d’échecs de projets précédemment introduits et de la volonté de voir les suivants acceptés. Par ailleurs, les pouvoirs publics aussi soulignent l’intérêt d’intégrer le citoyen dans le processus décisionnel. Aussi, le vade mecum réalisé sur initiative du ministère de la Région wallonne et le cadre de référence pour l’implantation d’éoliennes en Région wallonne de 2002 le promeuvent également : « une communication efficace et complète envers la population (est) un élément essentiel à la réussite d’un projet ». Dans le cadre d’un projet de recherche commandité par Electrabel en 2010, le Spiral (ULg) en collaboration avec le Centre Environnement et le Département de Psychologie, Cognition et Comportement (ULg), a eu l’occasion d’étudier les ressorts de l’acceptabilité locale en Région wallonne en vue de l’analyse et du développement d’outils adaptés permettant d’améliorer les processus décisionnels et de participation. Cette contribution se présentera en deux parties. Dans un premier temps, nous montrerons que le processus décisionnel en vigueur en Région Wallonne n’est pas étranger à l’acceptation difficile de certains projets de parc éolien. Le processus (au sens large, formel et informel) d’implantation d’un parc éolien est aux mains des promoteurs, de l’autorité politico-administrative et des citoyens. Chacun d’eux a des objectifs, une vision du projet et des discours qui leur sont propres. Pourtant, malgré leurs dynamiques propres, tous sont soumis à la même dynamique procédurale avec des armes parfois inégales. C’est précisément la manière dont les interactions, les rapports de forces entre ces entités se nouent et se jouent qui influencera l’issue du projet. Le processus tel qu’il est observé met en lui-même à mal le sentiment de justice procédurale des riverains, entendue comme le droit à un traitement équitable, comme le droit aux mêmes considérations que les autres dans le cadre d’une décision politique concernant la manière dont des biens et opportunités doivent être distribués (Kuehn, 2000). Dans un deuxième temps, nous présenterons les pistes de réflexion avancées par les acteurs de terrain pour construire un processus qui permette une meilleure appropriation. Les résultats de cette recherche empirique sont issus d’une combinaison de méthodes qualitatives mobilisées (38 entretiens semi-directifs, 4 focus group et un Atelier Scénario) dans le cadre d’un protocole précis. Quatre cas de projets d’implantation d’éoliennes répartis sur le territoire wallon et sélectionnés selon des critères bien établis ont pu être étudiés. En complément de l’analyse un grand nombre de documents issus des dossiers relatifs aux projets éoliens, disponibles aux administrations communales en question, dans la presse, sur Internet, quatre focus group (Stewart, Shamdasani & Rook, 2007) avec les riverains concernés et des entretiens semi-directifs ont été menés avec les différentes parties prenantes aux projets de parc éolien (bourgmestres, échevins, promoteurs, riverains, responsables de coopératives, fonctionnaires régionaux, etc.). L’identification des structures et les caractéristiques institutionnelles génératrices de conflit a permis d’envisager la base de contenu de la réflexion de Atelier Scénario (Fung, 2007 ; Sintomer, 2007) avec l’ensemble des acteurs liés au processus décisionnel d’implantation de parc éolien en Région wallonne pour mieux envisager les améliorations à y apporter au travers de l’exercice de prospective. [less ▲]

Synthesis of Na2FePO4F/Carbon composite cathode materials for lithium-ion batteries

Conference (2013, January 30)

Interactomic map of the Ets factors family : Identification of unexpected functions in mRNA processing

Poster (2013, January 28)

The Ets factors are a family of 27 transcription factors characterized by their unique DNA-binding domain. We aimed at building a protein-protein interaction (PPI) map (interactome) of the human Ets ... [more ▼]

The Ets factors are a family of 27 transcription factors characterized by their unique DNA-binding domain. We aimed at building a protein-protein interaction (PPI) map (interactome) of the human Ets factors in order to better define their roles and regulations in normal and oncogenic processes. The Ets interactome was built on a high-throughput yeast-two hybrid (Y2H) approach, and a literature and database curation. We identified 431 PPIs and 276 different protein partners. Clustering of the Ets interactome divided it into 24 functional subnetworks classified on their novelty index and their size. Cluster#1 was exclusively composed of newly identified interaction partners and was highly connected to the Erg subfamily of Ets factors. Gene ontology enrichment analysis revealed that it was associated to mRNA processing. In support of this result, we observed in HeLa cells that ERG and the components of cluster#1 localized in p-bodies and stress granules, physically linked cytoplasmic sites of mRNA degradation and silencing. Hence, we hypothesized that Erg proteins might have a role in post-transcriptional gene regulation and be involved in cellular mRNAs degradation. To test this hypothesis, we performed a MS2-based tethering assay and showed that the recruitment of ERG on a mRNA reporter promoted inhibition of its expression via a two-fold decrease of its half-life. ERG controls degradation of target mRNAs via different mechanisms including polysome stability, mRNA deadenylation, and p-bodies aggregation. A microarray-based appraoch identified 321 endogeneous genes whose mRNA decay rate was lowered in ERG silenced cells. Results point out the Nter domain of ERG as the predominant domain required for mRNA degradation. Importantly, oncogenic TET-Erg fusions described in AML and Ewing’s sarcoma exhibited diminished ability to degrade target mRNAs, concomitantly with the loss of the ERG Nter domain. This reinforces the important role of Erg proteins in mRNA degradation in cancer. [less ▲]

Méthodologie de calcul des flux turbulents : rotation du système de coordonnées

Conference (2013, January 28)

A Multi­‐Scale Computer Model of the Cardiovascular System Can Account for the Three Roles of the Left Atrium

in Abstract Book GIGA-Day (2013, January 28)

A Multi­‐Scale Computer Model of the Cardiovascular System Can Account for the Three Roles of the Left Atrium

Poster (2013, January 28)

Adult Bone Marrow Neural Crest and Mesenchymal Stem Cells : Which Role in Therapy of Neurological Pathologies ?

Poster (2013, January 28)

A splice-acceptor site variant in the bovine PIGH gene causes glycosylphosphatidyl inositol deficiency and lethal arthrogryposis syndrome.

Poster (2013, January 28)

Interaction of HTLV-­1 Tax with minichromosome maintenance proteins accelerates the replication timing program

Conference (2013, January 28)

Human T-lymphotropic virus type 1 (HTLV-1) is a retrovirus that infects about twenty million individuals worldwide. HTLV-1 is the causative agent of different diseases among which the most common are the ... [more ▼]

Human T-lymphotropic virus type 1 (HTLV-1) is a retrovirus that infects about twenty million individuals worldwide. HTLV-1 is the causative agent of different diseases among which the most common are the adult T-cell leukemia (ATL) and a neurodegenerative disorder called HAM/TSP (Human associated myelopathy/ Tropical spastic paraparesis). A key parameter of HTLV-1 pathogenesis is faster replication of provirus-carrying lymphocytes allowing clonal expansion of infected cell populations. The virally-encoded Tax oncoprotein plays an essential role in this process by interacting with DNA replication origins and accelerating S phase progression. By reprogramming the timing of origin firing, Tax also creates a replicative stress leading to DNA double strand breaks. This mechanism further triggers the DNA damage response (DDR) that induces cell cycle arrest and initiates either apoptosis or senescence. However, HTLV-1 infected cells have developed strategies to interfere with the DDR and are adapted to checkpoint control. These cells are thus able to proliferate despite occurrence of DNA damage. Based on these observations, we now propose a novel therapeutic approach based on the principle of synthetic lethality. [less ▲]

Simultaneous diagnosis of CLL and CML in a single patient with evidence for two different cell clones

Poster (2013, January 25)