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See detailIntroduction et conclusions
Delfosse, Annick ULg

Conference (2009, June 05)

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See detailA simple method for determination of electrospray response factors of noncovalent complexes: application to DNA G-quadruplex binding and self-assembly
Gabelica, Valérie ULg; Amato, Jussara; Oliviero, Giorgia et al

Conference (2009, June 04)

Introduction Electrospray mass spectrometry (ESI-MS) is now widely used to investigate non-covalent assemblies, and the power of the method resides in the individual detection of the various ... [more ▼]

Introduction Electrospray mass spectrometry (ESI-MS) is now widely used to investigate non-covalent assemblies, and the power of the method resides in the individual detection of the various stoichiometries present in the mixture. However, to characterize the mixture quantitatively (i.e. to determine the concentration of each constituent), the biggest challenge comes from the fact that electrospray response factors of all constituents can be different, especially for constituents of significantly different masses and charges. Here we present a novel and simple method to determine the response factors of all constituents, using an internal standard. The method can be transposed to a wide variety of biological problems and to different ionization methods. Experimental All oligodeoxynucleotides were purchased from Eurogentec (Seraing, Belgium). G-quadruplexes formation is induced by addition of ammonium acetate (150 mM) to the guanine-rich strand. Polythymines (e.g. dT6) with m/z not overlapping with those of the complexes were used as internal standards. The ESI mass spectra were acquired using a Q-TOF Ultima Global (Waters, Manchester, UK) in the negative ion mode, with source parameters optimized for detecting the intact complexes. Quadruplex-ligand binding constants were quantified by titration of the quadruplex with the ligand (BOQ1, Dr. Teulade-Fichou). The kinetics of G-quadruplex self-assembly was monitored on-line, with the starting time defined by the addition of ammonium to the single strand. Peak areas were calculated using MassLynx and data were processed using Mathcad. Preliminary results Let us illustrate the method for the characterization of the self-assembly of dCGGTGGT. In NH4OAc, this G-rich strand forms a tetramer within a few hours, but the most stable species is an octamer, which is formed after a few days. The relative intensities of monomer, tetramer and octamer vary with the experimental settings: harsher conditions favor the transmission of the larger complexes. It is therefore foolish to assume that the response factors of the monomer, tetramer and octamer are equal. Using dT6 as an internal reference, we monitored the self-assembly kinetics by recording at several time points the following intensities: I(ref2-), I(G12-), I(G45-) and I(G89-), where Gn indicates a complex containing n G-rich strands. For each species Gn, we define Rn as its response factor relative to that of the reference: [Gn]/[ref] = Rn * I(Gn)/I(ref). At each time point the mass balance equation for the strand concentration must be satisfied: [G]tot = [G1] + 4[G4] + 8[G8]. Substituting with the definition of Rn’s one obtains a set of equations: [G]tot = [ref] * {R1*(I(G1)/I(ref) + 4R4*I(G4)/I(ref) + 8R8*I(G8)/I(ref)}. If the number of equations (time points) is greater than the number of unknown response factors, the least-squares fit to this system of equations is calculated using the Moore-Penrose pseudoinverse of the matrix constituted by the intensity ratios. Once all response factors are known, concentrations are recalculated at each time point, providing detailed characterization of the reaction kinetics, including reaction intermediates. We will also show that the same method can be used to quantify ligand binding using titration of the substrate by the ligand. This will be illustrated with titration of the quadruplex (TGGGGT)4 by ligand BOQ1. This ligand binds to the quadruplex and also produces ligand-bridged quadruplex multimers, which the present method allows quantifying for the first time. [less ▲]

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See detailMéditations sartriennes de Bourdieu
Cormann, Grégory ULg

Conference (2009, June 04)

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Peer Reviewed
See detailA test of the Job Demands-Resources model: A social identity theory perspective.
Barbier, Marie ULg; Hansez, Isabelle ULg

Conference (2009, June 03)

The Job Demands-Resources mode has given rise to numerous studies aimed at a better understanding of positive and negative aspects of wellbeing at work. The existence of a motivational and an energetic ... [more ▼]

The Job Demands-Resources mode has given rise to numerous studies aimed at a better understanding of positive and negative aspects of wellbeing at work. The existence of a motivational and an energetic process leading to, respectively, engagement and exhaustion has been demonstrated. The aim of our study is to test this model using predictors derived from Social Identity Theory (or SIT). We hypothesize that working in a negatively valued occupation is associated with exhaustion and health problems, whereas a high identification with one’s occupational group is associated to engagement and low intent to quit the organisation (or IQ). Structural equation modelling was performed on data collected in a public administration (N = 954). We collected measures of occupation value, group identification, exhaustion, engagement, health problems and IQ. Items were parcelled based on their skewness. Excepted from Chi² being significant (p = .00), fit indices were satisfactory. The link between engagement and IQ is not significant but all other links go in the expected direction. We conclude that a test of the JDR model using SIT brings conclusive results. As a further step, it might be interesting to test interactive effects: results suggest that identification might buffer the relation between occupation value and exhaustion. Second, it might be interesting to introduce boundaries permeability, another key concept of SIT, as a third predictor. [less ▲]

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See detailMemory for visual items of central or marginal interest in complex scene: Impact of eye movements and subject’s expertise.
Blavier, Adelaïde ULg; Nyssen, Anne-Sophie ULg

Conference (2009, June 03)

In complex scene, memory for central interest items is better than memory for marginal interest items and this difference remains stable independently of the scene presentation duration (Melcher, 2006 ... [more ▼]

In complex scene, memory for central interest items is better than memory for marginal interest items and this difference remains stable independently of the scene presentation duration (Melcher, 2006). However, without eye movement recording, it is not possible to know whether central interest items are better remembered because they are more fixated or because they are more meaningful. To answer this question, we analysed the memory of complex scenes (paintings) according to the eye movements and subjects’ expertise. 15 novice subjects and 15 art historians (experts) were asked to look at 6 paintings that were separately and randomly presented for 10 seconds. After each painting presentation, subjects were asked questions about pictorial details of 3 categories: details of central or marginal interest and background information. Although experts had prior knowledge about the paintings, the accuracy of answers about the pictorial details did not differ between both groups: all subjects showed best memory for central information while they failed to remember background information and marginal details. Despite a longest time spent in the background zone, memory for these details was poorer than for central interest items, suggesting the importance of the meaning over the fixation duration. Eye movement recordings also showed novice’s answers were more accurate when they looked longer at the asked detail and when this detail was watched early on in the presentation while in the expert group, the accuracy of the answer was not influenced by the duration and moment they watched the asked detail. [less ▲]

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See detailImages et pathos. Figures de la créativité chez Aby Warburg
Hagelstein, Maud ULg

Conference (2009, June 03)

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See detailNew developments in the functionalization of aliphatic polyesters by "click" copper-catalyzed azide-alkyne cycloaddition
Lecomte, Philippe ULg; Riva, Raphaël ULg; Schmeits, Stephanie ULg et al

Conference (2009, June 03)

Nowadays, biodegradable and biocompatible aliphatic polyesters are widely used as environmentally friendly thermoplastics and biomaterials. Nevertheless, the absence of any pendant functional group is a ... [more ▼]

Nowadays, biodegradable and biocompatible aliphatic polyesters are widely used as environmentally friendly thermoplastics and biomaterials. Nevertheless, the absence of any pendant functional group is a severe limitation for the development of novel applications. Our strategy aiming at functionalizing aliphatic polyesters relies on the “click” copper-catalyzed cycloaddition (CuAAC) of alkynes duly substituted by functional groups or even chains onto PCL bearing pendant azides. The aliphatic polyesters bearing pendant azides have been very efficiently synthesized by a straightforward approach, which relies on the ring-opening copolymerization of αClεCL (or γBrεCL) and εCL (or lactide) followed by reaction with sodium azide to convert pendant chlorides or bromides into azides. The alternative reported by Emrick et al. is based on the CuAAC reaction of azides substituted by any functional group onto copolyesters of poly(ε-caprolactone) bearing pendant alkynes. Interestingly enough, Emrick et al. carried out the CuAAc reaction in water at 80°C. Unfortunately, it turned out, at least in our hands, that these conditions can not be extended to the derivatization of more sensitive aliphatic polyesters because degradation was then unavoidable. Nevertheless, we found out that degradation can be minimized whenever the CuAAC reaction is carried out in an organic solvent at lower temperature. Typically, the CuAAC reaction was carried out in DMF or THF at 35°C. Recently, it was shown that supercritical carbon dioxide can be used as a more environmentally friendly solvent than DMF or THF. The contamination by catalytic residues of aliphatic polyesters functionalized by the CuAAC reaction is a severe limitation in view of future applications, especially in the biomedical field. In the last part of this talk, a special attention will be paid on our current efforts to get rid of copper residues. [less ▲]

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See detailMALDI-Top-Down of Proteins: Overview and Applications
Quinton, Loïc ULg; Demeure, Kevin ULg; Resemann, Anja et al

Conference (2009, June)

Detailed reference viewed: 16 (5 ULg)
Peer Reviewed
See detailValidity of bench models in the learning of minimal invasive surgery
Blavier, Adelaïde ULg

Conference (2009, June)

Detailed reference viewed: 5 (1 ULg)
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See detailTheoretical Study of Transformation Mechanism for the Corundum-to-Rh2O3(II) Transition in Al2O3
Xu, Bin ULg; Dong, Jianjun; Stokes, Harold et al

Conference (2009, June)

Detailed reference viewed: 2 (0 ULg)
See detailProfessionalisation and Innovation: Friends or Ennemies?
Poumay, Marianne ULg

Conference (2009, June)

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See detailObjets Rebondissants Non Investigues
Dorbolo, Stéphane ULg; Terwagne, Denis ULg

Conference (2009, June)

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See detailActualités en impôts directs
Richelle, Isabelle ULg

Conference (2009, June)

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See detailcontroversies of inter-organizational ambidexterity
Degré, Julie ULg; Antoine, Mélanie ULg

Conference (2009, June)

Generally conceptualized at an intra-organizational level, ambidexterity can also appear at an inter-organizational level when organizations decide to collaborate and distribute activities of exploration ... [more ▼]

Generally conceptualized at an intra-organizational level, ambidexterity can also appear at an inter-organizational level when organizations decide to collaborate and distribute activities of exploration and activities of exploitation according to their specialty. In this paper, we investigate these collaborations, often presented as win-win solutions. On the basis of two case studies of R&D partnerships benefiting from regional subsidies, we show the tensions which cross these alliances and the controversies which divide the partners. Our analysis, based on actor-network theory, indicates that the conditions of a successful inter-organizational ambidexterity do not exist a priori. The success of the partnership rather rests on a continuous translation process creating the convergence between the stakeholders. [less ▲]

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See detailNatalizumab induced freedom from disease activity after failure to previous therapy in relapsing remitting multiple sclerosis.
Belachew, Shibeshih ULg; Bartholome E.; DELVAUX, Valérie ULg et al

Conference (2009, June)

Objectives: To analyze the efficacy of natalizumab after switching relapsing-remitting multiple sclerosis (RRMS) patients from other disease modifying treaments (DMTs). Background: Natalizumab (Tysabri ... [more ▼]

Objectives: To analyze the efficacy of natalizumab after switching relapsing-remitting multiple sclerosis (RRMS) patients from other disease modifying treaments (DMTs). Background: Natalizumab (Tysabri) is a monoclonal antibody directed against VLA4 that was recently approved for the treatment of RRMS. Due to safety concerns, the use should be restricted to highly active patients and/or patients with insufficient response to other DMTs. The pivotal trials were not designed to examine the effect of natalizumab as an escalation monotherapy. Methods: Prospective, open label, observational study. All patients initiating natalizumab had experienced at least 1 relapse in the previous year under DMTs and had at least 1 Gd-enhancing lesion on their brain MRI. Previous treatment with interferon-beta (IFN-beta) or glatiramer acetate (GA) were stopped at least one week and azathioprine or mitoxantrone at least 3 months before switching. The minimum therapy duration with natalizumab was 6 months for all patients. 21 RRMS patients were included in this analysis. The mean age of the patients was 25,5 yo with mean disease duration of 6,8 years. All patients were under IFN-beta (17) or GA (4) during at least the previous year before starting natalizumab therapy. Four patients had also received azathioprine and 1 patient mitoxantrone. Results: The mean relapse rate in the previous year was 2.15 (1-4), the mean EDSS at baseline was 3.3 (1,0-6.0), the mean number of Gd+ lesions at baseline 2,58 (1-6). Under tysabri treatment the annualized relapse rate dropped to 0,20. Eleven patients improved their EDSS (0,5 to 1,5 steps down), others remained stable at 6 months. The mean number of Gd+ T1 lesions dropped to 0,23 and the mean number of new T2 lesions was 0.25 on the control MRI at 6 months. 55% of patients were free from disease activity, i.e. had no relapses, no EDSS progression, no new T2 lesion and no Gd+ T1 lesions after 6 months of Tysabri. 5 patients experienced minor adverse events (1 zona, 2 flu-like symptoms, 1 gastroenteritis, 1 allergic reaction). Conclusion: Natalizumab was well tolerated and safe as escalation therapy when previous DMTs had failed to control disease progression in this group of highly active RRMS patients. These results suggest comparable efficacy to the phase III AFFIRM trial of natalizumab when the drug is used in a context of breakthrough disease. Although data from preliminary analyses are promising, long term investigations are warranted. [less ▲]

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See detailprésentation des travaux de recherche en lutte biologique
Jijakli, Haissam ULg

Conference (2009, June)

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Peer Reviewed
See detailThe timed 100-meter walk test: an easy-t-use, sensitive tool to detect and evaluate restricted walking capacities in multiple sclerosis.
Belachew, Shibeshih ULg; CALAY, Philippe ULg; DELVAUX, Valérie ULg et al

Conference (2009, June)

Objectives: The primary aim of this study was to develop a quantitative ambulation test that correlates with the maximal walking distance in multiple sclerosis (MS) patients. Background: The timed 25-foot ... [more ▼]

Objectives: The primary aim of this study was to develop a quantitative ambulation test that correlates with the maximal walking distance in multiple sclerosis (MS) patients. Background: The timed 25-foot walk (T25FW) weakly correlates with overall walking capacities of MS patients. We developed the timed 100-meter walk test (T100T), which besides reflecting speed may be more sensitive to other walking parameters such as gait and spasticity-related fatigue. Methods: In the T100T, the patient is instructed to walk as fast as possible on a distance of 100 meters. Eighty-eight MS patients with an EDSS score from 0 to 5.5 and 60 normal controls performed the T100T and the T25FW. In addition, 30 normal controls and 30 patients performed the tests twice. Results: T25FW (R2= 0.79) and T100T (R2 = 0.89) correlated with the nonlinear distribution of EDSS scores. The correlation between T100T and T25FW values was high (r2 = 0.81) for the low (0 to 3.0) and high (3.5-5.5) scores of EDSS. The intra-class correlations were excellent and similar for both tests. The range of T100T values in MS patients (40.4 to 114.7 seconds) was 10-fold wider than that of the T25FW (3.0 to 9.1 seconds). The univariate distribution analyses demonstrated that abnormal T100T values appear to be more sensitive than T25FW to predict walking limitations. Finally, the correlation with the reported and/or actual maximal walking distance without aid and rest was significantly better for T100T. Conclusions : The T100T proves to be superior to the T25FW in terms of discriminatory power for the detection and evaluation of restricted walking capacities in MS. The T100T should be of interest for clinical trials studying disability worsening and improvement across the spectrum of EDSS. It may provide more sensitive measure for ambulation change in quantifying progressive MS pathology. [less ▲]

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See detailOriginal cromakalim analogues as KATP channel openers
Florence, X.; De Tullio, Pascal ULg; Pirotte, Bernard ULg et al

Conference (2009, June)

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See detailStructure cordale, phonotraumatisme et lésions cordales
FINCK, Camille ULg

Conference (2009, June)

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See detailFrench Affirmative Action Based upon Spatial Inequalities: the case of inner city “Neighborhood Law and Justice Centres”
Lejeune, Aude ULg

Conference (2009, May 29)

In 1998, the French Parliament enacted a law regarding the struggle against discrimination . In response to this legislation, the French Minister of Justice implemented a new judicial structure (the ... [more ▼]

In 1998, the French Parliament enacted a law regarding the struggle against discrimination . In response to this legislation, the French Minister of Justice implemented a new judicial structure (the "Houses of Law") in areas which had been defined as "districts in difficulty" or "areas where the law is not applied anymore." The purpose of this structure was to provide advice to inner city inhabitants within these Houses of Law with the aim to reduce inequalities between the citizens who can hire private lawyers and the ones who cannot. First, this research examines the means by which the French Government implemented these affirmative action policies, which are an obstacle in the state's pursuit of the principle of equality; a fundamental precept of the French Republic . Instead of focusing on people, governmental policy targeted geographic areas, specifically inner city. Secondly, this research studies the work of private lawyers operating within the public sector judicial structures and asks whether these "Houses of Law" are equitable arrangements for all citizens due to their locational situation. [less ▲]

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See detailNouveaux outils de diagnostic in-vitro des allergies
Gadisseur, Romy ULg; Chapelle, Jean-Paul ULg; Cavalier, Etienne ULg

Conference (2009, May 29)

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See detailMMPs regulation of vascular permeability in cancer
Sounni, Nor Eddine ULg

Conference (2009, May 29)

Detailed reference viewed: 10 (1 ULg)
Peer Reviewed
See detailEspace originaire kantien et espace transitionnel chez Winnicott
Seba, Jean-Renaud ULg

Conference (2009, May 29)

La distinction kantienne du sens interne et du sens externe présuppose un espace originaire préalable à la distinction elle-même. Cet espace originaire est éclairé par la notion winnicottienne d'espace ... [more ▼]

La distinction kantienne du sens interne et du sens externe présuppose un espace originaire préalable à la distinction elle-même. Cet espace originaire est éclairé par la notion winnicottienne d'espace transitionnel. [less ▲]

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See detailUne approche reposante (RESTful) des aspects opérationnels de la rétroconversion du Französisches Etymologisches Wörterbuch (FEW)
Briquet, Cyril; Renders, Pascale ULg

Conference (2009, May 28)

Les articles du Französisches Etymologisches Wörterbuch (FEW) seront bientôt enrichis d'un balisage (XML) sémantique par une séquence d'algorithmes. Nous proposons un modèle éditorial distribué (“à la ... [more ▼]

Les articles du Französisches Etymologisches Wörterbuch (FEW) seront bientôt enrichis d'un balisage (XML) sémantique par une séquence d'algorithmes. Nous proposons un modèle éditorial distribué (“à la Wikipedia”) des corrections manuelles à apporter aux articles qui ne peuvent être automatiquement balisés. En outre, de manière à rendre totalement transparent pour les contributeurs le maintien de la consistance et de la synchronisation des trois quarts de million de documents considérés, nous proposons une plate-forme web de rétroconversion basée sur une architecture logicielle reposante (RESTful, cf. article Wikipedia sur REST). [less ▲]

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See detailConception d'algorithmes de rétroconversion
Renders, Pascale ULg; Briquet, Cyril

Conference (2009, May 28)

Rétroconvertir un ouvrage imprimé consiste à le transformer, de la manière la plus automatisée possible, en un ouvrage informatisé. Dans le cas d'un dictionnaire tel que le Französisches Etymologisches ... [more ▼]

Rétroconvertir un ouvrage imprimé consiste à le transformer, de la manière la plus automatisée possible, en un ouvrage informatisé. Dans le cas d'un dictionnaire tel que le Französisches Etymologisches Wörterbuch (FEW), il s'agit en outre de l'enrichir d'un balisage XML qui permette des consultations ciblées. Le noyau de l'opération est constitué de 37 algorithmes dits "de rétroconversion" qui balisent chacun un type d'information "cible" du dictionnaire. Cet article présente, en guise d'exemple, la mise au point de l'algorithme qui reconnaît et balise le(s) signataire(s) d'un article du FEW. [less ▲]

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See detailL’idée du vote à 16 ans auprès des jeunes Belges francophones : mesurer les effets de la discussion sur l’évolution des opinions
Fournier, Bernard ULg; Darquenne, Raphaël ULg; Flaba, Elodie ULg

Conference (2009, May 28)

La question de l’abaissement du droit de vote à 16 ans a toujours fait l’objet de débats dans certains cercles universitaires. Lors des dernières élections autrichiennes, les jeunes de 16 ans et plus ont ... [more ▼]

La question de l’abaissement du droit de vote à 16 ans a toujours fait l’objet de débats dans certains cercles universitaires. Lors des dernières élections autrichiennes, les jeunes de 16 ans et plus ont été invités à voter même si les jeunes eux-mêmes sont souvent partagés, voire hostiles à l’idée. Or, une question comme le droit de vote à 16 ans, peu discutée publiquement et engageant plusieurs dimensions de la vie d’un individu, n’est-elle pas une question de débat idéale, où la confrontation des idées peut amener à modifier les points de vue et révéler – et même modifier – les attitudes plus globales des jeunes envers l’intérêt politique et la participation ? Partant d’un sondage aléatoire auprès des 15-21 ans en Belgique francophone, un sous-échantillon de 400 jeunes sera retenu pour discuter du vote à 16 ans, de l’intérêt et de leur participation politique lors d’une journée avec 5 experts. Le sondage initial sera redistribué pour mesurer l’impact de la discussion et des entretiens approfondis seront menés avec un sous-groupe pour étudier les mécanismes de socialisation politique. Ces premiers résultats sont présentés. [less ▲]

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See detailLimits imported from economics
Sibony, Anne-Lise ULg

Conference (2009, May 28)

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See detailEmerging International Standards : If a dream could come true
Michel, Quentin ULg

Conference (2009, May 27)

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Peer Reviewed
See detailSelf-referential processing in future thinking
D'Argembeau, Arnaud ULg

Conference (2009, May 27)

Detailed reference viewed: 9 (0 ULg)
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See detailDe Duchamp à Mallarmé : réflexivité esthétique et réflexivité sociale
Durand, Pascal ULg

Conference (2009, May 26)

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See detailMeasuring Brand Image Perception and Changes in Brand Image Perception wth Brand Concept Maps - Capturing Strength, Uniqueness and Favourability of Brand Associations in Different Contexts
Brandt, Céline ULg

Conference (2009, May 26)

Recently, authors have emphasized the differences between brand images held by different individuals depending on the perception, the experience with the brand and the types of contacts with the company ... [more ▼]

Recently, authors have emphasized the differences between brand images held by different individuals depending on the perception, the experience with the brand and the types of contacts with the company. This finding is in sharp contrast with the conventional view recommending consistency and coherence in all the company’s actions. This research tradition has been called the consumer-focused view. Therefore, the author emphasized several academic motivations to develop research on brand image measurement on a consumer level. First, considering that different images are socially constructed constellations of meanings, established between marketers and consumers, with implications for both parties as well as for the marketplace and society at large, this phenomenon raises new issues in managing brand image: Should the company define segments with different brand perceptions and adapt its strategy to these perceptions, how can the city council satisfy the different stakeholders of a city brand, to what extent does the launch of a junior brand influence the perception of a senior brand with a similar name, to what extent do opinion leaders and antibrand activists influence the perception of a corporate brand. Second, there is a need for a process-oriented methodology, namely one that recognizes changes in brand images due to all the influences in the marketplace, to measure the brand perception and capture any change in the brand perception that is due to external factors, namely factors that are not decided by the company. Third, considering the link between brand image and brand equity, the method should focus on the contribution of attributes to brand equity, capturing the strengths, uniqueness and the favourability of these associations. And fourth, regarding the varied natures of brand attributes (functional, emotional, people, ethics, etc) depending on the type of brand (product brand, service brand, city brand and corporate brand), this technique to assess brand image perception should be applicable to all kinds of brands. As a result, the overall objective of this research is to provide profound insight into a measurement method of brand image perception and changes in brand image perception, capturing the strengths, uniqueness and favorability of brand attributes in different contexts, as a consequence of the new consumer focused and process-oriented views. [less ▲]

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See detailQuelle politique fiscale internationale pour la Belgique?
Richelle, Isabelle ULg; TRAVERSA, Edoardo

Conference (2009, May 25)

Les activités économiques se développent au-delà des frontières. Les contribuables se trouvent soumis à différents systèmes fiscaux, ce qui multiplie les situations de double imposition internationale ... [more ▼]

Les activités économiques se développent au-delà des frontières. Les contribuables se trouvent soumis à différents systèmes fiscaux, ce qui multiplie les situations de double imposition internationale. Les conventions bilatérales ont comme objectif d'en limiter les effets. Les différentes méthodes utilisées laissent cependant subsister certaines situations de double imposition. [less ▲]

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See detailArchaeomagnetic study performed on early medieval buildings from western France
Chauvin, Annick; Lanos, Philippe; Dufresne, Philippe et al

Conference (2009, May 25)

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See detailSurra-induced lymphopenia is directly triggered by a membrane-associated parasite protein
Antoine-Moussiaux, Nicolas ULg; Cornet, Anne ULg; Cornet, François et al

Conference (2009, May 24)

Detailed reference viewed: 14 (7 ULg)
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See detailDegradation mechanisms of Pt/C electrocatalysts at the nm-scale
Maillard, F.; Vion-Dury; Solhy, K. et al

Conference (2009, May 24)

Detailed reference viewed: 3 (0 ULg)
See detailGiving up the Ghosts: Diaspora and its Hereafter in “Once in a Lifetime” by Jhumpa Lahiri
Munos, Delphine ULg

Conference (2009, May 23)

In spite of diasporic subjectivity being recurrently conceptualised through a rhetoric of “fluidity,” “multiple affiliations” and “national non-attachment,” today’s literature of the Indian diaspora ... [more ▼]

In spite of diasporic subjectivity being recurrently conceptualised through a rhetoric of “fluidity,” “multiple affiliations” and “national non-attachment,” today’s literature of the Indian diaspora reveals that the “un-transnational” ideology of the return is still running deep in the first and second-generation migrant imaginary. Vijay Mishra’s recent attempt to explore the idea of “writing diaspora” in an analogy with writing trauma or writing mourning is illuminating in this respect, because it constitutes a theoretical framework able to bear witness to the maintenance of a diasporic imaginary structured by the loss of the Motherland, whether this loss involves firsthand experience of migration or originates from a “phantom loss” refigured by the second generation. Drawing on Mishra’s theorizing of the diasporic imaginary, my paper will explore Jhumpa Lahiri’s representation of the second generation’s “inheritance of loss” in “Once in a Lifetime,” the short-story opening Unaccustomed Earth’s trilogy. By narrating Hema’s and Kaushik’s parallel journey from childhood to early adulthood, Lahiri rewrites the notion of return as melancholic attachments through which the unsymbolizable gap left by the absence of the Motherland can be represented, renegotiated and perhaps then, put to rest. In my paper, I wish to show that not only does Lahiri use melancholy as a means of representing second-generation subjectivities haunted by impossible mourning and unclaimed legacies, but also that she rehabilitates the notion of return as a way of envisaging a diasporic future that is swarming with ghosts. In that sense, Lahiri illustrates that the notion of homeland and the trope of the return can also be associated with a promise of futurity. [less ▲]

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See detailThe European Union Implementation of Sustainable Development
Michel, Quentin ULg

Conference (2009, May 22)

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See detailBehaviour of Deep Reinforced Concrete Beams under Monotonic and Reversed Cyclic Loading
Mihaylov, Boyan ULg; Bentz, Evan; Collins, Michael

Conference (2009, May 22)

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See detailCe qui "nous" force à penser. Proust 1943-1964
Cormann, Grégory ULg

Conference (2009, May 22)

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See detailUse of the supercritical fluid technology to prepare efficient nanocomposite foams for environmental protection purpose
Urbanczyk, Laetitia ULg; Thomassin, Jean-Michel ULg; Huynen, Isabelle et al

Conference (2009, May 19)

This work reports on the preparation of novel nanocomposite foams that are efficient broadband microwave absorbers. Carbon nanotubes are first successfully dispersed into PCL and PMMA by melt blending ... [more ▼]

This work reports on the preparation of novel nanocomposite foams that are efficient broadband microwave absorbers. Carbon nanotubes are first successfully dispersed into PCL and PMMA by melt blending. Then, foaming is promoted by supercritical CO2 by depressurization. Regular cellular structures are obtained in both cases with cells size around 10-50µm. The electromagnetic interference (EMI) shielding efficiency of these materials are then evaluated and compared to the non-foamed nanocomposites. [less ▲]

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See detailInfluence function of the error rate of classification based on clustering
Ruwet, Christel ULg; Haesbroeck, Gentiane ULg

Conference (2009, May 19)

Cluster analysis may be performed when one wishes to group similar objects into a given number of clusters. Several algorithms are available in order to construct these clusters. In this talk, focus will ... [more ▼]

Cluster analysis may be performed when one wishes to group similar objects into a given number of clusters. Several algorithms are available in order to construct these clusters. In this talk, focus will be on two particular cases of the generalized k-means algorithm : the classical k-means procedure as well as the k-medoids algorithm, while the data of interest are assumed to come from an underlying population consisting of a mixture of two groups. Among the outputs of these clustering techniques, a classification rule is provided in order to classify the objects into one of the clusters. When classification is the main objective of the statistical analysis, performance is often measured by means of an error rate. Two types of error rates can be computed: a theoretical one and a more empirical one. The first one can be written as ER(F, Fm) where F is the distribution of the training sample used to set up the classification rule and Fm (model distribution) is the distribution under which the quality of the rule is assessed (via a test sample). The empirical error rate corresponds to ER(F, F), meaning that the classification rule is tested on the same sample as the one used to set up the rule. This talk will present the results concerning the theoretical error rate. In case there are some outliers in the data, the classification rule may be corrupted. Even if it is evaluated at the model distribution, the theoretical error rate may then be contaminated. To measure the robustness of classification based on clustering, influence functions have been computed. Similar results as those derived by Croux et al (2008) and Croux et al (2008) in discriminant analysis were observed. More specifically, under optimality (which happens when the model distribution is FN = 0.5 N(μ1, σ) + 0.5 N(μ2, σ), Qiu and Tamhane 2007), the contaminated error rate can never be smaller than the optimal value, resulting in a first order influence function identically equal to 0. Second order influence functions need then to be computed. When the optimality does not hold, the first order influence function of the theoretical error rate does not vanish anymore and shows that contamination may improve the error rate achieved under the non-optimal model. The first and, when required, second order influence functions of the theoretical error rate are useful in their own right to compare the robustness of the 2-means and 2-medoids classification procedures. They have also other applications. For example, they may be used to derive diagnostic tools in order to detect observations having an unduly large influence on the error rate. Also, under optimality, the second order influence function of the theoretical error rate can yield asymptotic relative classification efficiencies. [less ▲]

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See detailDevelopment of a small-scale scroll expander-based ORC
Quoilin, Sylvain ULg

Conference (2009, May 19)

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Peer Reviewed
See detailExtending the job Demands-Resources Model : safety behaviour and perceived safety climate.
Hansez, Isabelle ULg; Chmiel, N.

Conference (2009, May 16)

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See detailLa couleur des dehors dans les traités d’architecture français, XVIe-XVIIIe siècle
Gilles, Isabelle ULg

Conference (2009, May 15)

Témoin fondamental pour l’étude du bâti, le traité d’architecture constitue une source textuelle et iconographique, et plus généralement un document contextuel, qui détermine les règles de l’architecture ... [more ▼]

Témoin fondamental pour l’étude du bâti, le traité d’architecture constitue une source textuelle et iconographique, et plus généralement un document contextuel, qui détermine les règles de l’architecture dans ses dimensions les plus vastes : culturelles, sociales, économiques, techniques… Ainsi, dans le domaine de la « peinture d’impression », les auteurs nous livrent aussi bien des informations d’ordre technique (matières et mises en œuvre) que les usages d’une architecture pensée et écrite avec soin, dans laquelle chaque élément – et chaque couleur – occupe une place bien déterminée. Si la couleur des « dedans » prend naturellement le dessus dans une conception française de l’architecture qui a poussé au plus haut point l’art de la distribution, la couleur des « dehors » n’est néanmoins pas négligée. Aussi trouverons-nous dans les traités d’architecture les techniques et les usages qui conviennent aux « dehors » ; informations qui sont susceptibles de guider le restaurateur dans les choix d’intervention qu’il projette sur le bâti ancien. [less ▲]

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See detailLes principles de l’Eco-conception
Reiter, Sigrid ULg

Conference (2009, May 15)

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See detailLes stratégies wallonnes en matière de simplification administrative
Thoreau, François ULg

Conference (2009, May 15)

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See detailA Systems Biology Approach to Apoptosis Signalling
Schliemann, Monica ULg; Scheurich, Peter; Bullinger, Eric ULg

Conference (2009, May 15)

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Peer Reviewed
See detailLes standards internationaux : la place des situations et des contextes
Lafontaine, Dominique ULg

Conference (2009, May 15)

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See detailEco-conception : exemples d'écoquartiers
Marique, Anne-Françoise ULg

Conference (2009, May 15)

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See detailNovel Stealthy Gd(III)-DOTA/polymer Conjugates for Magnetic Resonance Imaging (MRI)
Grogna, Mathurin ULg; Bémelmans, Stéphanie ULg; Vanasschen, Christian ULg et al

Conference (2009, May 14)

Magnetic resonance imaging (MRI) is a routine diagnostic tool in modern clinical medicine. MRI has many advantages as a diagnostic imaging modality. It is noninvasive, delivers no radiation, and has ... [more ▼]

Magnetic resonance imaging (MRI) is a routine diagnostic tool in modern clinical medicine. MRI has many advantages as a diagnostic imaging modality. It is noninvasive, delivers no radiation, and has excellent (submillimeter) spatial resolution. Some Gadolinium(III) complexes are commonly used to enhance the contrast between adjacent tissues when the resolution/sensitivity of MRI is too low. Because free Gd3+ is very toxic in doses required for MRI, Gd(III) is chelated by poly(amino-carboxylate) such as diethylenetriamine pentaacetic acid (DTPA) or 1,4,7,10-Tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA). Although DTPA/Gd3+ and DOTA/Gd3+ are water soluble, they have a very short circulation lifetime in blood, a low molecular weight and a short rotational time that make the contrast poor. To enhance the contrast, the Gd3+/complex doses have to be increased. In order to increase the sensitivity of the technique, while not increasing the concentration of the contrast agent, we were investigating different strategies to improve (i) the circulation lifetime in blood, (ii) the relaxation rate of Gd(III) (and consequently, the contrasting efficiency) and (iii) the targeting of the contrast agent. This presentation aims at reporting how a multifunctional (co)polymer can be designed and exploited for improving the contrasting ability and bioavailability of gadolinium-based complexes. [less ▲]

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See detailTraitements des arthrites septiques chez le veau
Sartelet, Arnaud ULg; Touati, Kamal ULg

Conference (2009, May 14)

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See detailTagging with leisure needs
Pestieau, Pierre ULg

Conference (2009, May 14)

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See detailSocial and private LTC insurance with variable altruism
Pestieau, Pierre ULg

Conference (2009, May 14)

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See detailTraitement des fractures chez les bovins
Sartelet, Arnaud ULg; Mulon, Pierre-Yves

Conference (2009, May 14)

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See detailConformational analysis of new 5-HT1A ligands by molecular modeling
Dilly, Sébastien ULg; Graulich, Amaury; Liégeois, Jean-François ULg

Conference (2009, May 14)

5-HT1A receptors represent a major target for research and drug development due to their involvement in pathologies such as anxiety,1 depression,2 sleep and memory disorders,3,4 and schizophrenia.5 The ... [more ▼]

5-HT1A receptors represent a major target for research and drug development due to their involvement in pathologies such as anxiety,1 depression,2 sleep and memory disorders,3,4 and schizophrenia.5 The main feature of many drugs having a 5-HT1A affinity is the presence of arylpiperazine moiety.6 Indeed, the protonated nitrogen and the aromatic ring of the arylpiperazine compounds are considered crucial for the interaction with the receptor.7 Interestingly, an in vitro binding study realized in our laboratory reveals the presence of the 1,2,3,6-tetrahydropyridine instead of the piperazine moiety in 4-arylpiperazine-ethyl carboxamide derivatives is highly favourable for 5-HT1A affinity. In order to better understand the favourable effect of this chemical modification, we have performed a conformational analysis of these compounds mainly based on the position of the phenyl ring relative to the piperazine and tetrahydropyridine ones. In the piperazine compounds, the phenyl ring is found in a perpendicular orientation, whereas an almost planar orientation seems to be the most favourable conformation for the tetrahydropyridine compounds (See figure). Therefore, the almost planar orientation of the 4-substituted phenyl ring appears as an important spatial requirement for an optimal interaction with the receptor binding site. This finding could lead to new ideas in the design of high-affinity 5-HT1A ligands. [less ▲]

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See detailLe Dossier Professionnel Réflexif (DPR) en didactique des Langues et littératures modernes à l'ULg : un outil pour développer l'esprit critique et l'autonomie des futurs enseignants
Simons, Germain ULg

Conference (2009, May 13)

Depuis l'année académique 2007-2008, le service de didactique des Langues et littératures modernes de l'ULg a introduit un Dossier Professionnel Réflexif (DPR) qui clôture la formation de l'AESS du Master ... [more ▼]

Depuis l'année académique 2007-2008, le service de didactique des Langues et littératures modernes de l'ULg a introduit un Dossier Professionnel Réflexif (DPR) qui clôture la formation de l'AESS du Master/à finalité didactique. Ce DPR, sorte de "portfolio", vise à amener les étudiants à prendre distance par rapport à leur formation, à s'auto-évaluer en tant que professeur-stagiaire, et à imaginer des pistes de solution afin de s'améliorer dans le futur. La présente communication décrit et commente le dispositif mis en place et fournit quelques éléments d'évaluation. [less ▲]

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See detailAdolescents délinquants sexuels : délinquance et sexualité de ces adolescents à la lumière de leur timing pubertaire .
Glowacz, Fabienne ULg

Conference (2009, May 12)

De nombreuses recherches ( Haynie 2006, Kaltiala-Heino 2003, Parent, 2003, Beaver 2005, Lynne 2007,..) ont établi ces dernières années un lien entre le développement pubertaire et l’engagement dans des ... [more ▼]

De nombreuses recherches ( Haynie 2006, Kaltiala-Heino 2003, Parent, 2003, Beaver 2005, Lynne 2007,..) ont établi ces dernières années un lien entre le développement pubertaire et l’engagement dans des comportements délictueux, usage de drogue, conduites sexuelles et autres comportements exploratoires et déviants. Felson et Haynie (2002) affirment que le développement pubertaire a des effets sur différents types de délinquance, comparables à d’autres puissants prédicteurs de la délinquance. Bien que l’étude de Williams et Dunlop (1999) constate que les garçons à maturité précoce et tardive présentent des taux plus élevés de délinquance que leurs pairs à maturation normale, des recherches plus récentes (Ge 2002, Beaver 2005, Michaud 2006, Lynne 2007)…) soutiennent l’hypothèse de la précocité pubertaire en tant que facteur de risque : les garçons à puberté précoce ont un plus haut niveau d’engagement dans des comportements délinquants, agressifs et sexuels, alors que les garçons à puberté tardive s’engagent dans moins de délinquances (de type crime, violence, atteintes aux biens, usage de drogue et sexualité). Tous les auteurs reconnaissent la complexité des interactions entre facteurs biologiques et psychosociaux, et des liens entre puberté-comportements. La délinquance sexuelle juvénile, au croisement de la délinquance et de la sexualité, ne peut se dispenser d’un questionnement sur le développement pubertaire de ces adolescents . Dans le cadre de notre recherche « Adolescence, délinquances et processus pubertaires », nous avons évalué le timing pubertaire de 47 adolescents ayant commis une agression sexuelle que nous avons comparé à celui d’adolescents délinquants non sexuels (N=20) et d’adolescents non délinquants (N=249). Nos analyses confirment la pertinence de la prise en compte du développement pubertaire de l’adolescent et de ses répercussions psychologiques et sociales dans l’étude des conduites sexuelles délinquantes des adolescents. Les résultats reflètent une surreprésentation de « pubertés décalées » (avancées ou retardées) parmi les adolescents délinquants sexuels comparativement aux adolescents non délinquants, ainsi que des spécificités de la délinquance sexuelle par rapport à d’autres type délinquances. Ces résultats seront discutés dans une perspective biopsychosociale au travers d’une analyse des interactions entre timing pubertaire et socialisation, perception de soi et agressivité des adolescents délinquants sexuels. [less ▲]

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See detailObserver l’écoute : du paradoxe à l’enquête
Colon, Paul-Louis ULg

Conference (2009, May 11)

La communication faisait un état critique des techniques d'observation de la perception auditive qui tiennent compte de sa dimension sociale et culturelle.

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See detailHow much more Economics is the New Approach ?
Sibony, Anne-Lise ULg

Conference (2009, May 11)

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See detailModélisation de l’ionosphère pour les utilisateurs Galileo simple fréquence
Bidaine, Benoît ULg

Conference (2009, May 11)

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See detailLe lac Kivu: bilan des connaissances scientifiques et gestion de ses ressources
Darchambeau, François ULg; Descy, Jean-Pierre

Conference (2009, May 08)

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See detailL’état des stocks de poissons pélagiques : nouvelles évaluations par écho-sondages
Guillard, Jean; Darchambeau, François ULg

Conference (2009, May 08)

Detailed reference viewed: 6 (0 ULg)