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See detailPrélèvement d'organes après euthanasie: expérience belge
Ysebaert, Dirk; Detry, Olivier ULg; Squifflet, Jean-Paul ULg et al

Conference (2008, October 10)

Detailed reference viewed: 85 (13 ULg)
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See detailAnthropologie philosophique ou Wissenschaftslehre?
Dewalque, Arnaud ULg

Conference (2008, October 09)

Quelle place la philosophie doit-elle faire à la « question anthropologique » ou à la « question de l’homme » ? En dépit du succès incontestable de l’anthropologie philosophique dans le courant du ... [more ▼]

Quelle place la philosophie doit-elle faire à la « question anthropologique » ou à la « question de l’homme » ? En dépit du succès incontestable de l’anthropologie philosophique dans le courant du vingtième siècle, cette question est peut-être, comme on sait, plus complexe qu’il n’y paraît. Les travaux de Daniel Giovannangeli, en retraçant les médiations que l’on connaît (Kant lu par Heidegger, lui-même lu par Sartre et relu par Foucault), ont largement mis en lumière cette complexité. Sur quoi repose-t-elle ? Pourquoi l’orientation sur l’homme semble-t-elle à la fois incontournable et trop réductrice ? Je me bornerai ici à avancer une hypothèse, vers laquelle convergent, me semble-t-il, les travaux de D. Giovannangeli, et que je formulerais pour ma part de la manière suivante : le traitement philosophique de la question anthropologique est indissociable d’un problème de fondation, la philosophie se caractérisant elle-même prioritairement par une dimension fondationnelle. [less ▲]

Detailed reference viewed: 9 (2 ULg)
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See detailConvective drying tests of silt: experimental studies and modelling
Gerard, Pierre ULg; Bernadino, Joao; Léonard, Angélique ULg et al

Conference (2008, October 06)

Detailed reference viewed: 15 (4 ULg)
See detailDe la cinémathèque au musée : le film exposé ou les métamorphoses du monument
Thonon, Jonathan ULg

Conference (2008, October 04)

Detailed reference viewed: 13 (0 ULg)
See detailSterile technique facts and fiction
Brichant, Jean-François ULg

Conference (2008, October 04)

Detailed reference viewed: 7 (0 ULg)
Peer Reviewed
See detailOblique Object
Winand, Jean ULg

Conference (2008, October 03)

Detailed reference viewed: 9 (0 ULg)
Peer Reviewed
See detailQualitative analysis of pilot selection and basic flying training.
Bertrand, Françoise ULg; Tibax, V.; Hansez, Isabelle ULg

Conference (2008, October 03)

Detailed reference viewed: 26 (0 ULg)
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See detailThe unexpected hidden face of the Cephalosporin Antibiotic Ceftazidime: From biological to chemical and physical activities against oxidant species produced by phagocytes
Mouithys-Mickalad, Ange ULg; Deby-Dupont, Ginette; Mathy-Hartert, Marianne ULg et al

Conference (2008, October 03)

Background: Over several decades the use of antibiotics to treat infectious and bacterial diseases has been the main challenge. Ceftazidime (CAZ), belonging to the cephalosporin’s family, is known as ... [more ▼]

Background: Over several decades the use of antibiotics to treat infectious and bacterial diseases has been the main challenge. Ceftazidime (CAZ), belonging to the cephalosporin’s family, is known as empiric treatment for severe sepsis. Beside its antibiotic effect, CAZ has been shown to have other properties, making it unique. This study is aimed to investigate unexpected antioxidant properties of CAZ with special emphasis on the mechanism of action. Methods: Four in vitro and ex-vivo experimental models were designed 1) Assay of proteinases inhibitory activity of α2-macroglobulin (α2M) in the presence of trypsine (1.4µg) with or without 10-3 M CAZ, in 0.1 M Tris-HCl at pH 8.1. 2) Assessment of MPO-induced toxicity on endothelial cells or oxidant activities of stimulated phagocytes (PMNs) using 160 µM ferricytochrome C. 3) Effect of CAZ on two models of anoxia/reoxygenation from adherent and suspension alveolar cells (A549, 106 to 1010 cells/ml) using oxymetry coupled to EPR-spin trapping technique. 4) Cell-free systems to investigate: lipoperoxidation of linoleate induced by γ-irradiation, Fe2+/ascorbate system or ferryl species; Quenching of hydroxyl radical (·OH) and singlet oxygen (1O2)-scavenging activity from Mallet’s (H2O2/NaOCl) and Fenton’ reactions. Results: Ex-vivo assays show efficient protective effect of CAZ on plasmatic antiproteinases against oxidative stress; a dose-dependent inhibitory capacity on endothelial and A549 cells against MPO toxicity or excessive production of ROS during anoxia/reoxygenation. On cell-free systems, CAZ had unique 1O2–scavenging activity; and less effect on ferryl species. CAZ exerts its antioxidant effect by chelating activity. Conclusions: Overall results indicate that: 1) CAZ protects endothelial cells against MPO toxicity but also A549 cells towards the effect of anoxia/reoxygenation; 2) CAZ protects α2M and 3) acts as efficient inhibitor of lipid peroxidation of linoleate and hydroxyl radical and as singlet oxygen-scavengers. Antioxidant properties of CAZ might be relevant in clinical situations where excessive activation of leukocytes is known and in anoxia/reoxygenation model cause an increased production of ROS. [less ▲]

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See detailLes bénéfices de l'apprentissage d'application web 2.0 pour un public fragilisé
Géron, Stéphanie ULg; Jacquet, Maud ULg

Conference (2008, October 02)

Application web 2.0 et public fragilisé : présentation d'un module sur le traitement de texte en ligne dans le cadre du projet PMTIC

Detailed reference viewed: 19 (4 ULg)
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See detailAnalysis of climatic conditions of wildfires in Belgium with an automatic daily atmospheric circulation patterns classification
Erpicum, Michel ULg; Fettweis, Xavier ULg; Mabille, Georges ULg

Conference (2008, October 02)

An automatic daily atmospheric circulation patterns classification was built using the geopotential heights of 850 hPa level from the ECMWF (re)analysis over the period 1958-2007. The classification is ... [more ▼]

An automatic daily atmospheric circulation patterns classification was built using the geopotential heights of 850 hPa level from the ECMWF (re)analysis over the period 1958-2007. The classification is based on a similarity index between two 850hPa geopotential maps centred on Belgium, taking into account the slope difference between both daily geopotential surfaces as well as the absolute geopotential difference between both surfaces. Wildfire occurrences are analysed in April and September together with monthly frequencies and persistences of daily atmospheric circulation patterns types as well as with monthly variability of weather climate conditions. [less ▲]

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See detailLimestone karst rodents in Southeast Asia
Latinne, Alice ULg; Michaux, Johan ULg

Conference (2008, October 02)

Detailed reference viewed: 15 (1 ULg)
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See detailNew cycles found in air temperature data and proxy series
Nicolay, Samuel ULg; Mabille, Georges ULg; Fettweis, Xavier ULg et al

Conference (2008, October 01)

We apply the wavelet transform tool to detect unsuspected cycles in several climatic time series

Detailed reference viewed: 7 (1 ULg)
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See detailUne lecture scientométrique de la littérature sur les réseaux sociaux en sciences de gestion et en entrepreneuriat
Froehlicher, Thomas ULg; Bares, Franck; Bourgne, Patrick

Conference (2008, October)

Detailed reference viewed: 48 (6 ULg)
See detailWatch out Burn out
Nyssen, Anne-Sophie ULg

Conference (2008, October)

Detailed reference viewed: 26 (4 ULg)
See detailHistopathological comparison of two mouse-adapted influenza A strains in mice.
Garigliany, Mutien-Marie ULg; Habyarimana, Adélite; Cornet, Anne et al

Conference (2008, October)

Detailed reference viewed: 15 (7 ULg)
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See detailTransect GLACIOCLIM-SAMBA : observation et modélisation du Bilan de Masse de Surface sur la zone de transition côte-plateau Antarctique
Agosta, Cécile ULg; Genthon, Christophe; Favier, Vincent et al

Conference (2008, October)

Detailed reference viewed: 4 (0 ULg)
See detailVitamine D: effets « phosphocalciques » et « non-phosphocalciques ».
Cavalier, Etienne ULg; Souberbielle, Jean-Claude

Conference (2008, October)

Detailed reference viewed: 32 (2 ULg)
See detailSedimentological traces of earthquakes in recent lakes sediments along the North Anatolian Fault, Turkey
Avsar, Ulas; Boes, X; Hubert, Aurelia ULg et al

Conference (2008, October)

Detailed reference viewed: 5 (0 ULg)
See detailLa notion d'infiniment petit dans la construction des raisonnements économistes
Henry, Valérie ULg

Conference (2008, October)

Detailed reference viewed: 22 (2 ULg)
Peer Reviewed
See detailLe goût et l'odorat, une sensorialité commune?
Von Hoffmann, Viktoria ULg

Conference (2008, October)

Detailed reference viewed: 12 (0 ULg)
Peer Reviewed
See detailLa gestion de la diversité dans les PME
Cornet, Annie ULg; Warland, P.

Conference (2008, October)

Detailed reference viewed: 79 (12 ULg)
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See detailFire Performance of undamaged and pre-damaged welded steel-concrete composite beam-to-column joints with concrete filled tubes
Alderighi, Elisabetta; Bursi, Oreste; Franssen, Jean-Marc ULg et al

Conference (2008, October)

Major earthquakes in urban areas have often been followed by significant conflagrations that have been difficult to control and have resulted in extensive damage to property. Earthquakes, then, increase ... [more ▼]

Major earthquakes in urban areas have often been followed by significant conflagrations that have been difficult to control and have resulted in extensive damage to property. Earthquakes, then, increase the risk of loss of life if a fire occurs within a building. It is obvious therefore that a fire after an earthquake is a design scenario that should be properly addressed in any performance-based design, in locations where significant earthquakes can occur. In this paper both experimental and numerical results of undamaged and pre-damaged welded steel-concrete composite beam-to-column joints with concrete filled tubes are described as part of a European project aimed at developing fundamental data, design guidelines and prequalification of ductile and fire resistant composite beam-to-column joints. In detail, both the experimental program and the fire experimental results are presented and discussed in this paper together with thermal numerical simulations on frames and joints. Both the experimental activity and the numerical work demonstrated the adequacy of the seismic and joint fire design. [less ▲]

Detailed reference viewed: 52 (2 ULg)
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See detailMolecular Systematics of Rattini in South East Asia
Pagès, Marie ULg

Conference (2008, October)

Detailed reference viewed: 24 (0 ULg)
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See detailSpatial heterogeneity at small scale in the microbenthic loop of Posidonia oceanica meadows
Pete, Dorothée ULg; Lenartz, Fabian ULg; Velimirov, Branko et al

Conference (2008, October)

In the Mediterranean coastal zone, one the most important ecosystem is the Posidonia oceanica meadow. This seagrass is endemic of the Mediterranean Sea and plays many important ecological roles like ... [more ▼]

In the Mediterranean coastal zone, one the most important ecosystem is the Posidonia oceanica meadow. This seagrass is endemic of the Mediterranean Sea and plays many important ecological roles like oxygen production, nursery for numerous commercial species of fishes and protection of coastal zones by reducing the impact of waves. However, there is a severe lack of informations on small scale variations in its sediment compartment. In an attempt to understand spatial variations in the microbenthic loop (bacteria, organic matter, microphytobenthos and meiofauna) of this ecosystem, an experiment was led in Calvi Bay (Corsica, France), in March 2008, at 10 m depth. Twelve points were sampled randomly in a 125 x 125 cm grid, divided into twenty-five 25 x 25 cm squares, to assess and describe the spatial distribution and variations of different parameters of the sediment. Those parameters are granulometry, density of the P. oceanica meadow, nutrients concentration in pore water, bacteria (biomass, abundance, morphotypes), organic matter (biomass), microphytobenthos (biomass), roots and rhizomes (biomass) and meiofauna (biomass). Distribution maps were produced using the DIVA (Data-Interpolating Variational Analysis) method. Our results prove that the sediment compartment is highly heterogeneous at small scale, especially for bacteria and in the first centimeter of sediment cores. Moreover, a correlation has been established between microphytobenhtos variations and phosphate concentration in pore water. For the first time, such small scale variations are depicted in a P. oceanica meadow, which underlines the importance to take them into account in sampling strategies. [less ▲]

Detailed reference viewed: 59 (21 ULg)
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See detailBases biologiques et éco-hydrauliques pour la restauration de la continuité piscicole en rivière : premier bilan et perspectives en Région Wallonne (Belgique).
Ovidio, Michaël ULg; Philippart, Jean-Claude ULg; Denoel, Philippe et al

Conference (2008, October)

Dans le prolongement de la Directive Benelux d’avril 1996 (libre circulation des poissons migrateurs) et de la Directive Cadre sur l’Eau de l’Union Européenne (2000/60/CE), le rétablissement de la ... [more ▼]

Dans le prolongement de la Directive Benelux d’avril 1996 (libre circulation des poissons migrateurs) et de la Directive Cadre sur l’Eau de l’Union Européenne (2000/60/CE), le rétablissement de la continuité piscicole dans nos cours d’eau fait partie des objectifs prioritaires de la Direction des Cours d’eau Non Navigables du Ministère de la Région Wallonne. Depuis 1997, différents acteurs, gestionnaires, sociétés de pêches et scientifiques abordent en profondeur cette problématique par l’exécution de différentes actions intégrées. Depuis environ 10 ans, un travail de terrain considérable est accompli pour le compte de la Région wallonne par la Fédération de Pêche Vesdre-Amblève (asbl) qui répertorie et géoréférence la totalité des obstacles physiques susceptibles de perturber la continuité piscicole dans les cours d’eau de Wallonie. En parallèle, le Laboratoire de Démographie des Poissons et d’Hydroécologie (LDPH) de l’Université de Liège étudie l’impact biologique de certains de ces obstacles sur les populations de poissons, principalement en utilisant la technique du radio-pistage. Ces recherches permettent de mieux connaître les phénomènes de mobilité et de migrations des poissons de nos cours d’eau ainsi que leurs capacités à franchir en remontée des obstacles typologiquement très différents. Ces travaux permettent d’identifier les sites critiques qui doivent prioritairement êtres équipés de dispositifs de franchissement efficaces. Le contrôle scientifique du fonctionnement des passes migratoires nouvellement construites démontre clairement leurs effets positifs sur la qualité écologique et piscicole de la rivière. De tels résultats justifient fortement de multiplier ce type d’action de restauration écologique (hydromorphologique) dans d’autres cours d’eau. Au cours de notre exposé, nous présenterons, avec des résultats concrets, un premier bilan des travaux déjà effectués et nous dégagerons les perspectives à moyen et long terme en matière de libre circulation des poissons dans les cours d’eau wallons, non seulement en remontée mais aussi en descente (ou dévalaison). [less ▲]

Detailed reference viewed: 43 (3 ULg)
See detailOcean biogeochemical cycles and climate sensitivity in an Earth system model
Mouchet, Anne ULg; Loutre, M. F.; Fichefet, T. et al

Conference (2008, October)

Detailed reference viewed: 2 (0 ULg)
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See detailCrossed random effects models for the detection of differential item functioning in psychometrics
Magis, David ULg; Frederickx, Sofie; Tuerlinckx, Francis et al

Conference (2008, October)

Detailed reference viewed: 2 (0 ULg)
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See detailMulti-scale spatial variability of amphipod assemblages from the foliar stratum of the Posidonia oceanica (L.) Delile meadow
Sturaro, Nicolas ULg; Lepoint, Gilles ULg; Michel, Loïc ULg et al

Conference (2008, October)

Studying spatial patterns is of ecological importance in order to understand the causes of the distribution and abundance of organisms, and it also provides valuable basis for management and conservation ... [more ▼]

Studying spatial patterns is of ecological importance in order to understand the causes of the distribution and abundance of organisms, and it also provides valuable basis for management and conservation. In the Mediterranean coastal zone, the Posidonia oceanica seagrass meadows constitute one of the dominant ecosystems and are an important habitat for vagile invertebrates. Among these, amphipods comprise a large number of species, with considerable abundance and biomass, as well as being an important trophic resource for fish populations. Until now, little attention has been given to the horizontal variability at different spatial scales of amphipod assemblages associated with P. oceanica meadows. A hierarchical sampling design, spanning three orders of magnitude (from 1 to 100s of metres) was elaborated. Sampling was undertaken in March 2007 in the meadows of Calvi Bay (NW Corsica), at depths ranging from 10 to 13 m, using a suction sampler. Our results indicated an important horizontal variability of the studied assemblage, and this at different spatial scales. In addition, these results tend to show that the small scale (~ 1 m and ~ 10 m) influenced abundance, while the medium-scale (~ 100 m) influenced diversity. Some potential causes of the observed patterns are discussed. These results emphasize the importance of considering different spatial scales in the study of the vagile invertebrates associated with P. oceanica meadows. [less ▲]

Detailed reference viewed: 60 (21 ULg)
See detailRemote Sensing of Suspended Particulate Matter in Turbid Waters: State of the Art and Future Perspectives.
Ruddick, Kevin; Nechad, Bouchra; Park, Youngje et al

Conference (2008, October)

Detailed reference viewed: 29 (3 ULg)
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Peer Reviewed
See detailCoded structural light imaging system for weed detection in outdoor conditions
Destain, Marie-France ULg; Piron, Alexis ULg

Conference (2008, October)

A method of determining the position of weeds growing in soil amongst crops is described. Is uses a camera to acquire stereoscopic images of plants.

Detailed reference viewed: 22 (2 ULg)
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See detailLa répression du négationnisme en Belgique : de la réussite législative au blocage politique
Grandjean, Geoffrey ULg

Conference (2008, October)

This study focuses on the prosecution of genocide-denial in Belgium and on the current deadlock of this political question. A political science approach is used to shed light on this issue which makes ... [more ▼]

This study focuses on the prosecution of genocide-denial in Belgium and on the current deadlock of this political question. A political science approach is used to shed light on this issue which makes often the headlines. The study is based on the analysis of parliamentary documents and on several interviews with the key actors of this issue. This approach enables an analytic understanding of this question. The research topic is all the more meaningful because it concerns dialectics between the present and the past and it puts into questions the place of history in politics. [less ▲]

Detailed reference viewed: 42 (3 ULg)
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See detailEmerging International Standards : If a dream could come true
Michel, Quentin ULg

Conference (2008, September 25)

Detailed reference viewed: 11 (3 ULg)
See detailOn mathematical concepts for the material world
Leclercq, Bruno ULg

Conference (2008, September 25)

Detailed reference viewed: 71 (6 ULg)
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See detailReflection spheres of the public, social and cooperative economy
Fecher-Bourgeois, Fabienne ULg; Lévesque, Benoît

Conference (2008, September 24)

Detailed reference viewed: 6 (3 ULg)
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See detailThree-dimensional extension of the Io UV footprint emissions
Bonfond, Bertrand ULg; Grodent, Denis ULg; Gérard, Jean-Claude ULg et al

Conference (2008, September 23)

The Io UV footprint is an auroral feature observed close to the feet of the field lines passing through Io on both Jovian hemispheres. These light emissions are caused by the electromagnetic interaction ... [more ▼]

The Io UV footprint is an auroral feature observed close to the feet of the field lines passing through Io on both Jovian hemispheres. These light emissions are caused by the electromagnetic interaction between the satellite Io and the Jovian magnetosphere. For both the north and south poles, the Io footprint appears as a bright spot followed by a faint trailing tail and occasionally followed or preceded by secondary spots. The footprint morphology and the spots multiplicity have been found to vary with the location of Io in the plasma torus. [less ▲]

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See detailJupiter’s main auroral emission; local time and temporal variability
Grodent, Denis ULg; Radioti, Aikaterini ULg; Bonfond, Bertrand ULg et al

Conference (2008, September 23)

Jupiter's main auroral oval is associated with the ionosphere-magnetosphere coupling current system which is related to the breakdown of corotation in the middle magnetosphere. Its auroral footpath is ... [more ▼]

Jupiter's main auroral oval is associated with the ionosphere-magnetosphere coupling current system which is related to the breakdown of corotation in the middle magnetosphere. Its auroral footpath is usually represented as a smooth line closing around the pole. However, this simplistic view is misleading in many regards. We have constructed a new reference contour in the northern hemisphere (Figure 1), based on more than 1000 HST/UV images, which does not look like an oval and does not close around the pole. We use this reference contour to quantify the effects of temporal and local time variability of the magnetospheric plasma characteristics on the location of the main auroral emission. Beyond the orbit of Ganymede (15RJ), two key ingredients are expected to have a measurable influence on the instantaneous shape of the main emission contour: the azimuthal current flowing in the current sheet [1,2] and the corotation breakdown distance. The former affects the radial extent of the magnetic field lines, and the latter determines the radial location of the field aligned currents transmitting momentum from the planet to the lagging plasma. So far, models used to magnetically map the auroral main emission between the ionosphere and the equatorial plane assumed that these two parameters are constant and axisymmetric. However, in situ observations, mainly by Galileo, have revealed large local time asymmetries and temporal variations in the plasma flows and distribution. These variations have an impact on the azimuthal current and the distance at which the plasma angular velocity becomes significantly smaller than planetary rotation. We use a new magnetic field model [3], inherited from VIP4 and including a magnetic anomaly in the northern hemisphere, to simulate the effects of these asymmetries on the location of the main auroral emission, and interpret the large scattering of the corresponding HST data point. [less ▲]

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See detailThe altitude of Saturn’s aurora: implications for the auroral electron energy and location of the polar homopause
Gérard, Jean-Claude ULg; Bonfond, Bertrand ULg; Gustin, Jacques ULg et al

Conference (2008, September 23)

The Space Telescope Imaging Spectrograph (STIS) and the Advanced Camera for Surveys (ACS) on board the Hubble Space Telescope (HST) have been used to study the characteristics of Saturn’s FUV aurora ... [more ▼]

The Space Telescope Imaging Spectrograph (STIS) and the Advanced Camera for Surveys (ACS) on board the Hubble Space Telescope (HST) have been used to study the characteristics of Saturn’s FUV aurora, which is dominated by the Lyman and Werner bands of H2 and the H Lyman-α line. Images have been analyzed to determine the altitude of the emission above the limb and infer the characteristic energy of the auroral electrons. Our study shows that the peak of the emission is located 1000-1300 km above the limb, indicating that the precipitated electrons are mostly in the 0.1-1 keV energy range, that is significantly less than on Jupiter. Another source of information on the electron energy are the FUV spectra obtained with Voyager UVS (Sandel et al., 1982) and the HST-STIS (Gérard et al., 2004) and Cassini-UVIS spectrographs which only occasionally show a signature of absorption by hydrocarbons. Consequently, the emission is located above but close to the methane homopause. Finally, EUV spectra collected with the FUSE satellite (Gustin et al., 2008) provide information on the H2 column overlying the aurora through analysis of self-absorption and rotational temperature of the emitting layer from the intensity distribution among the H2 lines. If Moses et al. (2000)’s low latitude model is used to convert altitudes into pressure levels, H2 and hydrocarbon columns and temperature, discrepancies appear between the observed temperature, ultraviolet colour ratio and geometric altitude of the emission. One possibility is that the temperature near the homopause sharply increases at a pressure level higher than in the equatorial regions. [less ▲]

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See detailThe Io Footprint Morphology
Jacobsen, Sven; Saur, Joachim; Neubauer, F. M. et al

Conference (2008, September 23)

The innermost Galilean moon Io is embedded in a dense plasma torus. It disturbs the flow of the corotating torus plasma and generates MHD waves. Especially the Alfv ́ n e mode, which carries electric ... [more ▼]

The innermost Galilean moon Io is embedded in a dense plasma torus. It disturbs the flow of the corotating torus plasma and generates MHD waves. Especially the Alfv ́ n e mode, which carries electric currents along the magnetic field, is responsible for the famous Io footprint in the Jo- vian aurora. The Alfv ́ n waves are partly reflected at plasma e density gradients e.g. at the torus edges and form a compli- cated wave pattern. The footprint morphology in the Jovian aurora displays this pattern. Besides the main spot feature, a trailing wake extending over up to 100 degrees and occa- sionally occurring multiple spots indicating reflections have been identified. The intensity, the occurrence of multiple spots and the inter-spot distances have been found to vary strongly [1]. Io is moving up and down in the plasma torus confined to the centrifugal equator. It interacts with a dense plasma when located in the torus center and considerably thinner plasma at the torus flanks. The incoming plasma density controls the interaction strength and wave amplitude. This primar- ily leads to a relationship between the footprint brightness and Io’s centrifugal latitude [1]. However, it has also been shown that the reflection angle is strongly depending on the wave amplitude due to nonlinear effects [2]. This has an impact on the inter-spot distances. On the other hand this parameter is also directly affected when Io changes its posi- tion in the plasma torus. To deconvolve this system we present the results of our 3D MHD simulations showing the influence of Io’s centrifugal latitude and nonlinearities on the footprint morphology par- ticularly on the number of spots and inter-spot distances. We observe interference phenomena leading to locally en- hanced or reduced footprint brightness. We also discuss the recently observed leading spot feature [3]. [less ▲]

Detailed reference viewed: 2 (0 ULg)
See detailNovel pH responsive-copolymers for smart drug carriers
Jérôme, Christine ULg

Conference (2008, September 22)

Detailed reference viewed: 5 (1 ULg)
See detailEuropean legislation on methods for antibiotics detection in milk
Scippo, Marie-Louise ULg

Conference (2008, September 22)

Detailed reference viewed: 27 (0 ULg)
Peer Reviewed
See detailFootball and political violence
Fincoeur, Bertrand ULg

Conference (2008, September 20)

Detailed reference viewed: 8 (4 ULg)
See detailLa pré-dialyse
Krzesinski, Jean-Marie ULg

Conference (2008, September 19)

Detailed reference viewed: 10 (0 ULg)
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See detailQu’est-ce que les logiciels libres ?
Lejeune, Christophe ULg

Conference (2008, September 19)

Detailed reference viewed: 7 (1 ULg)
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See detailAnalyse collaborative avec Cassandre
Lejeune, Christophe ULg

Conference (2008, September 19)

Detailed reference viewed: 9 (0 ULg)
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See detailApplications de la micro - PIV dans des écoulements libre et confiné
Vetrano, Maria-Rosaria; Ruwet, Vincent; Lebeau, Frédéric ULg et al

Conference (2008, September 16)

L’objectif de cette communication est l’étude de deux micro-écoulements différents au moyen d’un système de micro-PIV non inversé. Ces écoulements diffèrent entre eux par les aspects suivants: Le premier ... [more ▼]

L’objectif de cette communication est l’étude de deux micro-écoulements différents au moyen d’un système de micro-PIV non inversé. Ces écoulements diffèrent entre eux par les aspects suivants: Le premier, un écoulement pulmonaire, est représentatif d’un flux stationnaire confiné. Le second, la formation de gouttelettes par un capillaire contrôlé par un cristal piézoélectrique, est représentatif d’un écoulement périodique à surface libre. La faisabilité de ce type de mesure est évaluée en mettant l’accent sur le fait que ces expérimentations ont été menées sur des micro-écoulements courbes tridimensionnels. [less ▲]

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See detailImagination et politique chez Hobbes
Herla, Anne ULg

Conference (2008, September 11)

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See detailRecent advances in the synthesis of aliphatic polyesters by “click” chemistry
Riva, Raphaël ULg; Jérôme, Christine ULg; Jérôme, Robert ULg et al

Conference (2008, September 11)

Since the discovery of Sharpless and Meldal, the copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) is more and more popular in the field of macromolecular engineering owing to its robustness, its ... [more ▼]

Since the discovery of Sharpless and Meldal, the copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) is more and more popular in the field of macromolecular engineering owing to its robustness, its high tolerance to a wide range of functional groups without any need of protecting groups and the absence of side-products. This reaction is known to be a very efficient “click” reaction as defined by Sharpless. The chemical modification of aliphatic polyesters remains, at the time being, a very difficult task to achieve because of the very limited number of efficient chemical reactions, which can be implemented in the absence of chain degradation. The main purpose of this contribution is to report on the most recent advances on the use of CuAAC to derivatize aliphatic polyesters (Scheme 1). Interestingly enough, it was recently shown that CuAAC carried out onto aliphatic polyesters attached with either azides or alkynes is very efficient under mild conditions, which limit undesirable degradation. Several functional groups were grafted onto aliphatic polyesters by CuAAC without using any protection/deprotection reactions. The CuAAC is also very efficient to prepare aliphatic polyesters with various architectures as highlighted by the synthesis of graft copolymers, star-shaped copolymers and networks. This “click” chemistry has been combined with other polymerization mechanism such as ATRP in order to extend further the range of available polymers. [less ▲]

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See detailAnalyse des curriculums officiels et implantés dans les pays de la Confemen
Lejong, Michèle ULg

Conference (2008, September 10)

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See detailMacromolecular engineering of aliphatic polyesters by ring-opening polymerization
Lecomte, Philippe ULg; Jérôme, Christine ULg; Jérôme, Robert ULg

Conference (2008, September 09)

During the past few years, a steadily increasing attention was paid to the synthesis of biodegradable and biocompatible aliphatic polyesters because of potential applications as biomaterials or as ... [more ▼]

During the past few years, a steadily increasing attention was paid to the synthesis of biodegradable and biocompatible aliphatic polyesters because of potential applications as biomaterials or as environmentally friendly thermoplastics. The first purpose of this work is to show that the modification of these aliphatic polyesters by pendant functional groups is an efficient tool to tailor the main properties, including biodegradation rate, bioadhesion, hydrophilicity, degree of crystallinity. The strategies implemented for the synthesis of aliphatic polyesters bearing pendant functional groups rely on the synthesis of g-substituted e-caprolactones followed by their ring-opening polymerization and on the chemical modification of duly functionalized aliphatic polyesters.The second part of the lecture will be dedicated to some recent examples dealing with the use of functional caprolactones to prepare various architectures such as star-shaped copolymers, graft copolymers, macrocycles and networks. [less ▲]

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See detailAbout the use of PCL/clay nanohybrid masterbatches
Benali, Samira; Brocorens, P.; Olivier, A. et al

Conference (2008, September 09)

Detailed reference viewed: 26 (9 ULg)
Peer Reviewed
See detailLa subjectivation des normes comme expérience de l’écart, de Foucault à Canguilhem
Bolmain, Thomas ULg

Conference (2008, September 09)

Detailed reference viewed: 16 (1 ULg)
See detailFoams of polycaprolactone/MWNT nanocomposites for efficient EMI shielding
Thomassin, Jean-Michel ULg; Pagnoulle, Christophe; Bednarz, Lukasz et al

Conference (2008, September 09)

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Full Text
See detailAbout pointwise smoothness of some nondifferentiable functions
Nicolay, Samuel ULg

Conference (2008, September 09)

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See detailLa prééclampsie - éclampsie
Brichant, Jean-François ULg

Conference (2008, September 08)

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See detailL'analgésie péridurale en obstétrique et ses échecs
Brichant, Jean-François ULg

Conference (2008, September 08)

Detailed reference viewed: 26 (0 ULg)
See detailFunctional nanoobjects by means of polymers
Van Butsele, Kathy; Aqil, Abdelhafid ULg; Jérôme, Christine ULg

Conference (2008, September 08)

Detailed reference viewed: 3 (1 ULg)
See detailBiomarqueurs en toxicologie: ADN oxydé et adduits à l'ADN
Pirson, Laurence ULg

Conference (2008, September 05)

Detailed reference viewed: 28 (1 ULg)
See detailInfluence des processus attentionnels sur le fonctionnement exécutif lors du vieillissement normal
Collette, Fabienne ULg; Hogge, Michaël

Conference (2008, September 04)

Detailed reference viewed: 9 (0 ULg)
See detailHarmonisation of European Construction Law : Consumers First
Kohl, Benoît ULg

Conference (2008, September 04)

Detailed reference viewed: 13 (0 ULg)
Peer Reviewed
See detailPathology of influenza virus H5N1 infection in resistant and susceptible laboratory mice.
Garigliany, Mutien-Marie ULg; Cloquette, Karine; Leroy, Michaël et al

Conference (2008, September)

Detailed reference viewed: 3 (0 ULg)
Peer Reviewed
See detailDesign Space for analytical methods. A Bayesian perspective based on multivariate models and prediction
Lebrun, Pierre ULg; Boulanger, Bruno ULg; Jullion, Astrid et al

Conference (2008, September)

Detailed reference viewed: 34 (13 ULg)
See detailDynamiques d'apprentissage inter-organisationnel dans les projets des pôles de compétitivité wallons
Rondeaux, Giseline ULg

Conference (2008, September)

En septembre 2005, le Gouvernement wallon décide d’adopter « le plan Marshall wallon » formellement baptisé sous le nom de « Plan d’Actions Prioritaires pour l’avenir wallon ». Parmi les priorités de ce ... [more ▼]

En septembre 2005, le Gouvernement wallon décide d’adopter « le plan Marshall wallon » formellement baptisé sous le nom de « Plan d’Actions Prioritaires pour l’avenir wallon ». Parmi les priorités de ce plan, s’inscrit la mise en place des pôles de compétitivité. La création de ces réseaux, visant à transformer le potentiel de connaissance, de recherche et d’innovation de la Région en valeur économique, rassemble différents acteurs (entreprises, centres de recherche privés et publics et centres de formation). Au sein des cinq pôles de compétitivité mis en place mi-2006, nous avons choisi de nous centrer en particulier sur 4 projets qui en ont émergé, que nous analysons de manière qualitative et longitudinale. La méthodologie mise en œuvre s’apuie à la fois sur l’observation-participation, et sur la réalisation d’entretiens avec des acteurs clés, dont certains menés sur le mode du story-telling. L’un des objectifs principaux de notre recherche consiste à comprendre comment les entreprises, centres de recherche et de formation parviennent à mettre en œuvre des dynamiques partenariales afin de créer des projets innovants. Pour ce faire, nous avons choisi de centrer notre regard, en particulier, sur les dynamiques d’apprentissage inter-organisationnel. Nous inspirant des travaux d’Holmqvist (2003), nous examinons ainsi les dynamiques d’ouverture et de centrage (soit les dynamiques de transition d’un apprentissage d’exploration à un apprentissage d’exploitation et vice-versa), d’internalisation et d’extension (soit l’articulation entre l’apprentissage intra- et inter-organisationnel). En particulier, nous tentons de distinguer, d’une part, quels sont les indicateurs concrets témoignant de l’occurrence de ces dynamiques ; d’autre part, nous nous attachons à voir quelles sont les actions entreprises, au niveau des partenariats, afin d’enclencher ces dynamiques –par exemple, quelles sont les décisions qui sont prises, à un moment donné du projet, pour passer d’une démarche d’exploration à une démarche d’exploitation-. Ces différents éléments de compréhension des processus d’apprentissage inter-organisationnel et des dynamiques qui les traversent, nous mèneront à identifier ultérieurement quels facteurs peuvent être assimilés à des bonnes pratiques. Les premiers résultats de cette étude, toujours en cours, fournissent d’ores et déjà divers éléments prometteurs relatifs aux étapes critiques que peuvent constituer les dynamiques en question, et les actions mises en œuvre par les partenaires des projets lors de leur occurrence. Ainsi, par exemple, parmi l’ensemble des projets, nous avons pu observer que l’étape d’internalisation des connaissances (c’est-à-dire le moment où l’entreprise se réapproprie l’apprentissage réalisé au niveau inter-organisationnel) est porteuse de conflits potentiels. Les stratégies et dynamiques de centrage et d’ouverture sont, quant à elles, portées par des catégories différentes d’acteurs. De ce fait, les décisions relatives à l’action de « centrer » sont, bien souvent, un enjeu fort, voire une source potentielle de conflit puisque la phase de centrage, où sont arrêtés des choix structurants, rime avec réduction de liberté, et peut mener à une reconfiguration du partenariat initial. Ceci implique des enjeux en termes de pertes et gains pour les différents partenaires du projet. L’on peut également voir que, sur la question de la pérennisation, les projets se positionnent différemment. Les réflexions ou actions à cet égard, porteuses de plusieurs types d’enjeux, sont le cadre de nombreux jeux d’acteurs. Nous illustrerons ces premiers constats par des exemples concrets issus des projets analysés. [less ▲]

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See detailCorrelation law for SMD in high viscous liquids
Vetrano, Maria-Rosaria; Lebeau, Frédéric ULg; Rambaud, Patrick et al

Conference (2008, September)

Spray characterization, i. e. a velocity map of the liquid and gaseous phases and the sizing of the liquid droplet, remains of a great importance in different industrial applications such as in the ... [more ▼]

Spray characterization, i. e. a velocity map of the liquid and gaseous phases and the sizing of the liquid droplet, remains of a great importance in different industrial applications such as in the automotive or pharmaceutical industries. Correlations capable to faster this characterization already exist. They allow the evaluation of the droplet Sauter Mean Diameter in a precise location of the spray using non-dimensional numbers involving physical and chemical properties of the liquid and the spray operative conditions. This paper concerns the possibility to include in the correlative laws also the effect of the liquid viscosity through the introduction of the Ohnesorge number (Oh). In order to achieve this goal an extensively experimentalcampaign is performed, by means of a Phase Doppler Interferometer, for size and velocity measurements in a full cone spray. Parameters as the hydraulic diameter of the nozzle, the operatingpressure and the liquid viscosity are varied in order to cover large range of Weber and Ohnesorge numbers. [less ▲]

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Peer Reviewed
See detailGeneralized life and motion configurations reasoning model
Hallot, Pierre ULg; Billen, Roland ULg

Conference (2008, September)

Detailed reference viewed: 37 (11 ULg)
Peer Reviewed
See detailTests and design of stainless steel lipped channel section columns
Rossi, Barbara ULg

Conference (2008, September)

Detailed reference viewed: 7 (0 ULg)
Peer Reviewed
See detailDécalage didactique dans un cours de statistique descriptive en première année à l'université
Henry, Valérie ULg

Conference (2008, September)

Chargée d’un cours de statistique descriptive en 1ère année de bachelier en ingénieur de gestion à l’Université de Liège, nous avons voulu mettre en place une méthode d’enseignement centrée sur l’activité ... [more ▼]

Chargée d’un cours de statistique descriptive en 1ère année de bachelier en ingénieur de gestion à l’Université de Liège, nous avons voulu mettre en place une méthode d’enseignement centrée sur l’activité cognitive des apprenants (Henry – Leclercq [2]) et s’inscrivant dans une logique de développement de compétences transversales et disciplinaires. Les dispositions prises pour l’implémentation de ce dispositif nous ont conduit à identifier certaines difficultés relatives à l’apprentissage des notions concernées et dont nous ne soupçonnions pas la présence. Lors de l’exposé, nous relaterons principalement trois expériences réalisées en classe et qui sont à la source de nos constatations. La première activité, qui s’est déroulée lors du tout premier cours, était consacrée à des pré-requis supposés, soit les notions de pourcentage et de taux de variation. Cette séance consistait en un Questionnaire à Choix Multiples projeté à l’écran et pour lequel les étudiants disposaient de Boîtiers de Vote Electronique (Gilles et al. [1]). Ces BVE leur permettaient de répondre aux questions en appuyant sur le bouton correspondant à la solution choisie, les statistiques des solutions données par l’ensemble des étudiants s’affichant à l’écran dès la clôture des votes. La deuxième activité a consisté en la rédaction, par groupes d’étudiants, de démonstrations non encore exposées. Les productions des élèves ont été reprises et corrigées par l’enseignant. Nous décrirons quelque peu ce que ces travaux nous ont appris sur les représentations de nos étudiants. Enfin, nous avons eu l’occasion de mettre en place une activité de débat scientifique au sens de Marc Legrand (Legrand [3]) à propos de la définition de l’écart absolu moyen. Nous verrons comment cette activité s’est déroulée et comment une définition correcte a pu émerger des débats entre étudiants. Dans tout l’exposé, nous insisterons sur le décalage existant entre le discours de l’enseignant et les représentations mentales des étudiants ainsi que sur la nécessité de mettre à jour des conceptions qui peuvent nuire à la construction de savoirs que nous jugeons parfois élémentaires à l’université. [less ▲]

Detailed reference viewed: 127 (9 ULg)
Peer Reviewed
See detailDC magnetron sputtering deposition of titanium oxide nanoparticles : influence
Dreesen, Laurent ULg; Cecchet, Francesca; Lucas, Stéphane

Conference (2008, September)

Detailed reference viewed: 19 (4 ULg)
Peer Reviewed
See detailDeformation capacity design of stainless steel lipped channel columns
Rossi, Barbara ULg

Conference (2008, September)

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See detailMODELLING OF A DOMESTIC GAS-FIRED CONDENSING BOILER
Makaire, Danielle ULg; Ngendakumana, Philippe ULg

Conference (2008, September)

Nowadays, condensing technology is widely used in domestic heating. This paper presents a model that simulates the performance in steady-state regime of a domestic gas-fired condensing boiler. The model ... [more ▼]

Nowadays, condensing technology is widely used in domestic heating. This paper presents a model that simulates the performance in steady-state regime of a domestic gas-fired condensing boiler. The model is similar to a conventional boiler model with a dry heat exchanger at which a wet heat exchanger is added to simulate the heat recovered by condensation. Experimental parameters are used to simulate the different components. The model has been applied to a 24 kW gas-fired condensing boiler test bench available in the laboratory. According to the experimental results (at full load), the model predicts correctly the thermal efficiency of the boiler. Indeed, calculated values are in good agreement with measured values. [less ▲]

Detailed reference viewed: 132 (8 ULg)
See detailControl of floral transition in maize
Van Kerkhoven, Fabrizio ULg; D'Aloia, Maria ULg; Périlleux, Claire ULg

Conference (2008, September)

Flowering time in plants is controlled by a number of environmental factors, among which photoperiod plays a key role. Maize ancestors are short-day (SD) plants, but breeding programs have selected ... [more ▼]

Flowering time in plants is controlled by a number of environmental factors, among which photoperiod plays a key role. Maize ancestors are short-day (SD) plants, but breeding programs have selected genotypes whose flowering is largely autonomous and occurs after production of a constant number of leaves regardless of photoperiod. Only few flowering time genes have been identified in maize; one of them is INDETERMINATE1 (ID1), cloned from a late-flowering mutant and encoding a zinc finger transcription factor. By contrast, the genetical control of flowering by photoperiod is best understood in the long-day (LD) dicot Arabidopsis and the SD monocot rice. A key regulator is the CONSTANS gene that mediates between the circadian clock – the time-keeper of the plant – and the synthesis of flowering signals. Here we report the analysis of a CONSTANS homolog in maize, ZmCO, in SD and in LD, and in different parts of the plant. Expression of ZmCO was found to be rhythmic and to be much higher in young leaf primordia than in mature leaf blades. Striking coincidence was observed with expression of ID1. [less ▲]

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See detailThe mining work of children under methodological plurality
Andre, Géraldine ULg; Godin, Marie; Mrsic-Garac, Sonia

Conference (2008, September)

Detailed reference viewed: 11 (1 ULg)