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See detailFood Chain Security and Vulnerability: Belgian Case Study
Brunet, Sébastien ULg; Fallon, Catherine ULg

Conference (2007, October 25)

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See detailNatural and projectively equivariant quantizations
Radoux, Fabian ULg

Conference (2007, October 21)

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See detailMondialisation et déclin de la puissance de l'Etat
Pâques, Michel ULg

Conference (2007, October 19)

La souveraineté de l'Etat lui donne la puissance de régler toute question dans la sphère étatique et de corriger le jeu des forces du marché au profit d'autres intérêts. L'absence de souveraineté à l ... [more ▼]

La souveraineté de l'Etat lui donne la puissance de régler toute question dans la sphère étatique et de corriger le jeu des forces du marché au profit d'autres intérêts. L'absence de souveraineté à l'échelle mondiale empêche le réglement équivalent des questions qui échappent au cadre étatique. La mondialisation d'une question entraîne une difficulté de réglementation et de correction des forces du marché au profit d'autres intérêts. La mondialisation et le déclin de la puissance de l'Etat sont liés. [less ▲]

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See detailLinearizing Option Returns for Portfolio and Risk Management
Bodson, Laurent ULg; Hübner, Georges ULg

Conference (2007, October 18)

This paper proposes a method to deduce the first four moments and the co-moments (with any other asset) of an option return. We consider the dynamics of an option-replicating portfolio of four basic ... [more ▼]

This paper proposes a method to deduce the first four moments and the co-moments (with any other asset) of an option return. We consider the dynamics of an option-replicating portfolio of four basic assets: the underlying, two long-term options and a zero coupon bond. This approach allows us to capture the moments up to order four of the underlying and to linearize the option return. A numerical example illustrates some of the features and applications of this model. [less ▲]

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See detailUsing survey data to resolve the exchange risk exposure puzzle
Muller, Aline ULg; Jongen, Ron; Verschoor, Willem

Conference (2007, October 17)

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See detailQualitative Spatio-Temporal Reasoning & Spatial Database Design
Donnay, Jean-Paul ULg; Hallot, Pierre ULg; Laplanche, François

Conference (2007, October 17)

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See detailAdaptation du Voice Handicap Index à la voix chantée
Morsomme, Dominique ULg; Gaspar, Martine; Jamart, Jacques et al

Conference (2007, October 16)

Le V.H.I. de Jacobson et al. ne traduit pas les difficultés éprouvées par le chanteur. L’étude présentée ici est l’aboutissement de 5 travaux visant à l’adaptation de l’index à la voix chantée. Chaque ... [more ▼]

Le V.H.I. de Jacobson et al. ne traduit pas les difficultés éprouvées par le chanteur. L’étude présentée ici est l’aboutissement de 5 travaux visant à l’adaptation de l’index à la voix chantée. Chaque étude a évalué la fiabilité et la cohérence des items. Morsomme et Gaspar ont proposé une nouvelle version dont les items ont été reformulés dans le but de rendre cet outil accessible à tous les chanteurs dysodiques ou non. Nous avons évalué la fiabilité et la cohérence interne de cette dernière mouture, sur une population de 192 chanteurs classiques et 27 non chanteurs. Pour la validation de l’échelle, la comparaison des scores moyens aux deux tests montrent que les résultats du retest est significativement inférieurs pour la sous échelle fonctionnelle (p=0.013) et le score global (p=0.006). Nous observons une bonne stabilité test/retest (ICC: E Fonctionnelle:0.869, E Emotionnelle: 0.846, E Physique: 0.85, Score Global: 0.878/ Rho de Spearman F: 0.855, E: 0.834, P: 0.858, G: 0.886). La cohérence interne de chaque sous échelle (Cronbach’s alpha) est bonne (>0.80). Les corrélations entre les 3 sous échelles sont assez élevées (FvsE: 0,613 /EvsP: 0,737/ FvsP: 0,693). Chaque sous échelle mesure une dimension particulière tout en restant homogène entre-elles. La différence test-retest entre les chanteurs et les contrôles est non significative. Au test de Levene le groupe contrôle a une plus grande variabilité de réponses pour le score globale (p=0.02), les E fonctionnelle (p<0 .001) et physique (p=0.009). Trois variables font augmenter significativement les résultats: être soliste (F:p=0.046; E: p=0.002; P: p=0.056; G: p=0.006), être amateur (F:p<0.001; E: p=0.019; P: p<0.001; G: p=0.001), et avoir une plainte vocale (F, E, P et G: p<0.001). En conclusion, le V.H.I. adapté aux chanteurs se révèle fiable, valide et adapté à la population de chanteurs classiques. [less ▲]

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See detailNatural and projectively equivariant quantizations
Radoux, Fabian ULg

Conference (2007, October 13)

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See detailDensité Minérale Osseuse et risque fracturaire : une relation prédictive?
Bruyère, Olivier ULg

Conference (2007, October 13)

Detailed reference viewed: 4 (1 ULg)
See detailLa valeur philosophique de la psychanalyse lacanienne
Gyemant, Maria ULg

Conference (2007, October 13)

Detailed reference viewed: 8 (0 ULg)
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See detailLongitudinal study to explain early exit : work or quality of life ?
Bertrand, Françoise ULg; Schreurs, B.; Tibax, V. et al

Conference (2007, October 12)

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See detailInteraction between human papillomavirus (HPV) and natural killer (NK) cells
Renoux, Virginie ULg; Longton, Laurence; Dortu, Estelle ULg et al

Conference (2007, October 10)

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See detailLe théâtre à Liège, aperçu critique
Delhalle, Nancy ULg

Conference (2007, October 06)

Detailed reference viewed: 24 (6 ULg)
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See detailUS/India Civil Nuclear Cooperation Initiative: the Question of Safeguards
Michel, Quentin ULg

Conference (2007, October 04)

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See detailMicro-technology for space mission
Loicq, Jerôme ULg

Conference (2007, October 03)

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See detailDesign, synthesis and anticancer activity of novel hydroxylated coumarin derivatives
Hemmer, Marc ULg; De Tullio, Pascal ULg; Bernard, Y. et al

Conference (2007, October)

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See detailStudies in medical context: methodology and case studies
Blavier, Adelaïde ULg

Conference (2007, October)

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See detailThrombin activity profile: a rapid, reliable and relevant ex vivo screening test for the development of anticoagulant drugs
Robert, S.; Ghiotto, J.; Pirotte, Bernard ULg et al

Conference (2007, October)

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See detailLaboratory, field and airborne spectroscopy for monitoring organic carbon content in agricultural soils
Stevens, A.; van Wesemael, B.; Tychon, Bernard ULg et al

Conference (2007, October)

This study explains the potential and the limits of a field ASD spectrometer and a CASI airborne instrument to assess the Soil Organic Carbon, in the context of soil carbon mapping.

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See detailDesign, synthesis, and pharmacological evaluation of cromakalim analogues as pancreatic β-cell-selective KATP channel openers
Florence, X.; De Tullio, Pascal ULg; Lebrun, Ph. et al

Conference (2007, October)

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See detailVoice disorders post thyroid surgery
FINCK, Camille ULg

Conference (2007, October)

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See detailLandscape and participation: construction of a PhD research problem and an analysis method. Towards the comparative analysis of participatory processes of landscape management projects design on a local scale in the Walloon region (Belgium)
Droeven, Emilie ULg

Conference (2007, October)

A preliminary reflection to the definition of a PhD research problem on the concepts of participation, landscape and project, led the student to be interested in the participatory processes of landscape ... [more ▼]

A preliminary reflection to the definition of a PhD research problem on the concepts of participation, landscape and project, led the student to be interested in the participatory processes of landscape management projects design, and in the inhabitants landscapes representations. The method includes the comparative analysis of local processes of projects design, and the direct observation of two Walloon landscape management projects design (investigation conducted with stakeholders implied in the project design and among inhabitants, direct observation, organisation of participative meeting-debates. Fitting her research approach within the field of the territorial participative research-action, the PhD student assumes that the participation of the territorial actors and the population can “feed” the scientific research as well as territorial action. She reconsiders moreover some difficulties encountered in her research. [less ▲]

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See detailEst-ce qu'il est possible d'obtenir le résultat véritable d'un élève même si celui-ci tente de tricher ?
Raîche, Gilles; Blais, Jean-Guy; Magis, David ULg

Conference (2007, October)

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See detailDevelopment of original pyridinic analogues of nimesulide as cycloxygenase inhibitors
Renard, Jean-François ULg; de Leval, Xavier; Pirotte, Bernard ULg

Conference (2007, October)

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See detailThe lifetime of bouncing droplets
Terwagne, Denis ULg; Vandewalle, Nicolas ULg; Dorbolo, Stéphane ULg

Conference (2007, October)

Detailed reference viewed: 4 (1 ULg)
See detailAssurance-vie et planification patrimoniale
Leleu, Yves-Henri ULg

Conference (2007, October)

Detailed reference viewed: 61 (4 ULg)
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See detailQuick data set generation and exact P-value computation in goodness-of-fit testing
Magis, David ULg

Conference (2007, October)

Detailed reference viewed: 4 (0 ULg)
See detailStudy of VOC and odour emissions during the convective drying of urban residual sludges
Léonard, Angélique ULg; Martin, Georges; Nicolas, Jacques ULg et al

Conference (2007, October)

Detailed reference viewed: 36 (22 ULg)
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See detailUna proyección sintética para el diseño arquitectónico con la luz del sol
Benoit, Beckers; Masset, Luc ULg; Beckers, Pierre ULg

Conference (2007, October)

Detailed reference viewed: 114 (16 ULg)
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See detailPlan de gestion de la diversité : la difficile construction des indicateurs?
Cornet, Annie ULg; Warland, P.

Conference (2007, October)

Detailed reference viewed: 23 (1 ULg)
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See detailAssessment of Lake Sediment Sensitivity along the North Anatolian Fault
Boes, Xavier; Ulas, Avsar; King, J et al

Conference (2007, October)

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See detailPolymer (PE) synthesis - scaling up to industrial scale
Detrembleur, Christophe ULg

Conference (2007, September 30)

Detailed reference viewed: 12 (1 ULg)
See detailJuvenile delinquency and gender issues
Gavray, Claire ULg

Conference (2007, September 28)

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See detailIntertextual Transformations in the Work of Janet Frame
Delrez, Marc ULg

Conference (2007, September 27)

Detailed reference viewed: 11 (0 ULg)
See detailPrevention of GBS perinatal infections: guidelines and update
Melin, Pierrette ULg

Conference (2007, September 27)

Detailed reference viewed: 9 (1 ULg)
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See detailAmphibia-Reptilia: Editorial report 2005-2007
Denoël, Mathieu ULg

Conference (2007, September 22)

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See detailSocial dialogue in Europe: reason and method of the transnational comparison
Orianne, Jean-François ULg

Conference (2007, September 20)

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See detailLe gender mainstreaming et le gender budgeting en Belgique
Cornet, Annie ULg

Conference (2007, September 19)

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See detailRole of masks, caps, gowns and skin disinfection
Brichant, Jean-François ULg

Conference (2007, September 15)

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See detailTransgression sexuelle à l’adolescence : un passage à l’acte sexuel dans le parcours de la délinquance ou un passage à l’acte délinquant dans le parcours sexuel de ces adolescents ?
Glowacz, Fabienne ULg

Conference (2007, September 14)

Depuis quelques années, en Belgique, notre pratique d’expert judiciaire rend compte d’une augmentation des signalements et de plaintes d’abus sexuel à l’encontre d’adolescents ainsi que de l’abaissement ... [more ▼]

Depuis quelques années, en Belgique, notre pratique d’expert judiciaire rend compte d’une augmentation des signalements et de plaintes d’abus sexuel à l’encontre d’adolescents ainsi que de l’abaissement de l’âge de ces adolescents suspectés de tels agissements sur des enfants pré-pubères ou des pairs. Si ces adolescents ont en commun cette transgression sexuelle qui prend diverses formes, tous les auteurs ( Worling, 2001, Barbaree and Marshall, 2006, Hunter J.A., Figueredo A.J., Malamuth N.M. & Becker J.V., 2003 …) s’accordent sur le fait que ces adolescents et pré-adolescents forment un groupe hétérogène au niveau de leur mode de fonctionnement psychologique, social et sexuel, et au niveau de leur engagement dans la délinquance. Dans le cadre de notre communication, à partir des données préliminaires d’une recherche portant sur le fonctionnement psychologique et psycho-social de ces pré-adolescents et adolescents, et d’une présentation de vignettes cliniques, nous développerons les différentes formes de passages à l’acte transgressif au niveau sexuel selon l’âge des adolescents et l’âge des victimes, et nous tenterons de comprendre l’inscription de cet acte au niveau du de développement psycho-social de l’adolescent et de son engagement dans la délinquance. Une analyse plus spécifique portera sur le mode de consommation pornographique de ces mineurs « transgresseur sexuel » qui sera comparé au mode de consommation pornographique d’un échantillon d’adolescents et adolescentes non délinquants et à un groupe d’adolescents et adolescentes délinquants. [less ▲]

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See detailPeptides entrapped in biodegradable PLGA microparticles accelerate tissue repair at gastric ulcer treatment in rats
Markvicheva, E; Stashevskaya, K; Prudchenko, I et al

Conference (2007, September 09)

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See detailExploring the Formation Pathways of DNA G-Quadruplex Architectures
Rosu, Frédéric ULg; Poncelet, Harmonie; Teulade-Fichou, Marie-Paule et al

Conference (2007, September 07)

Guanine-rich DNA strands can form the so-called G-quadruplex architectures due to the formation of quartets of guanines linked by 8 hydrogen bonds. G-quadruplexes are further stabilized by the inclusion ... [more ▼]

Guanine-rich DNA strands can form the so-called G-quadruplex architectures due to the formation of quartets of guanines linked by 8 hydrogen bonds. G-quadruplexes are further stabilized by the inclusion of cations between the G-quartets. The abundance of G-rich regions throughout the genome and their very presence in telomeric regions made G-quadruplexes interesting targets. NMR and crystallographic studies of G-quadruplex structures revealed amazing variety in the G-quadruplex topologies. The next challenge will be to understand the rules governing the formation of the various topologies, in order to predict relevant G-quadruplexes in the genome, and in order to act rationally on their formation or disruption. To date, only few experimental [1] or theoretical [2] studies have been devoted to investigating the mechanisms of G-quadruplex formation. We report here a detailed investigation of DNA G-quadruplex formation pathways using electrospray mass spectrometry (ESI-MS). The sequences TGnT (n = 3-6) were purchased from Eurogentec (Seraing, Beliugm). ESI-MS experiments were performed in the negative ion mode on a Q-TOF Ultima Global (Waters, Manchester, UK). The cation used was ammonium (up to 150 mM). Experiments were performed in the presence and absence of methanol (up to 20%) as co-solvent. ESI-MS allows counting both the number of strands and the number of cations in each intermediate. We could confirm the presence of transient dimer and trimer intermediates in low abundance. More unexpectedly, ESI-MS also reveals unambiguously the formation of pentamers which contain ammonium cations. The pentamers slowly convert into tetramers. Counting the number of included cations also revealed that, in the case of (TG6T)4, inclusion of four ammonium cations is fast, while the inclusion of the last ammonium ion is very slow. We also found that the addition of methanol (initially added to obtain higher ion intensities) significantly increases the rate of G-quadruplex formation. Finally, we also investigated the role of G-quadruplex ligands in the rate of formation of G-quadruplexes. We could classify the ligands according to their increase of G-quadruplex formation kinetics, and distinguish the intermediates. Interestingly, one ligand showed formation of a higher-order structure by bridging two G-quadruplexes. Acknowledgement: The authors thank the FRS-FNRS for their support. References: [1] J. Gros et al., Nucleic Acids Res., 2007, doi:10.1093/nar/gkm111. [2] R. Stefl et al., Biophys. J., 2003, 85(3), 1787-1804. [less ▲]

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See detailNew Data on Political Interest and Participation of the Young People (16-18 y. old) in Liège, Belgium
Fournier, Bernard ULg; Reuchamps, Min ULg

Conference (2007, September 06)

In 1990, one of us administered a questionnaire to 640 students from nine high schools in Liège (Belgium) and its suburb. The survey aimed at measuring the political interest of the youth and their level ... [more ▼]

In 1990, one of us administered a questionnaire to 640 students from nine high schools in Liège (Belgium) and its suburb. The survey aimed at measuring the political interest of the youth and their level of participation in a wide range of associations. The questionnaire, which was also administered in Quebec and Paris, was made of 200 other indicators (confidence toward the institutions, impact of the political decisions, role of the state, etc.). Last spring, we administered a similar questionnaire to the same schools in order to compare the data gathered in our previous researches and the new data. The comparison will engage the oft-asked questions in the field about political participation—or its decline—amongst the youth. The new data show, as in 1990, that approximately two-thirds of the students (16-18 years old) participate in associational life in a broad sense. Political participation sensu stricto is still less popular than participation in organisations campaigning for the defence of human rights or the environment. We also observe significant differences in the traditional sociological categories. Yet, as we did for the 1990 data, we shall move our analysis beyond the usual sociological categories in order to stress the internal differences between groups. As such, we shall privilege the analysis in terms of classifications. With a more precise image of the various forms of participation as well as the attitudes related to it, different patterns will characterise young people’s participation. Accordingly, our understanding of the political socialisation’s mechanisms will be adapted. Such an inquiry seems necessary in order to engage the traditional views on political participation and interest of today’s youth. [less ▲]

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See detailState of the Art in Spinal Cord Injury – Research and Clinical Application
Martin, Didier ULg

Conference (2007, September 06)

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See detailMacromolecular engineering of cyclic aliphatic polyesters by ring-opening polymerization and "click" chemistry
Lecomte, Philippe ULg; Li, Haiying; Riva, Raphaël ULg et al

Conference (2007, September 04)

The last decades have witnessed a steadily increasing progress in the macromolecular engineering of the main families of synthetic polymers. Ring-shaped copolymers show a unique topology due to the ... [more ▼]

The last decades have witnessed a steadily increasing progress in the macromolecular engineering of the main families of synthetic polymers. Ring-shaped copolymers show a unique topology due to the absence of any chain-end and exhibit distinct properties from their linear counterparts, such as glass transition temperature, order-disorder transition, reduced viscosity, lower hydrodynamic volumes. This communication aims at reporting on a novel route to biodegradable cyclic polyesters. Our strategy is based on the work of Prof. Kricheldorf who initiated the ring-opening polymerization of ε-caprolactone by cyclic tin dialkoxides, e.g., 2,2-dibutyl-2-stanna-1,3-dioxepane (DSDOP) in order to obtain “living” macrocyclic PCL, still containing two endocyclic tin-oxygen bonds. In this work, the resumption of polymerization by a few units of ε-caprolactone substituted by an acrylic unit, e.g., 1-(2-oxooxepan-3-yl)ethyl prop- 2-enoate, followed by intramolecular photo-crosslinking of pendant unsaturations and finally by hydrolysis gave rise to macrocyclic PCL. As a rule, this strategy is very well-suited for the synthesis of high molecular weight PCL. Moreover, tin alkoxides were kept untouched after the cross-linking step and remained thus available for further macromolecular engineering. The process was extended to the synthesis of other architectures such as sun-shaped, two-tail tadpoleshaped, and eight-shaped copolyesters. The second part of the lecture, it will be shown that the copper(I)-catalyzed Huisgen’s [3+2] cycloaddition, which is the most popular “Click" reaction, is very efficient to graft alkynes, duly substituted by functional groups or chains, onto aliphatic copolyesters bearing pendant azides. Interestingly enough, mild conditions were found and no degradation was observed during the “click” derivatization of copolyesters of PCL. The “click” reactions of alkynes onto pendant azides of copolyesters of PLA, by far more sensitive than PCL, was also successfully carried out without any detectable degradation. ”Click” chemistry is very versatile because this reaction was successfully implemented to graft functional groups or chains directly onto ω-azido-ε-caprolactone, without any ring-opening of the lactone, in order to make available a new range of functional caprolactones. Finally, the “click” grafting of PEO onto the tails of tadpole-shaped copolymers will be shown to be a route to amphiphilic copolymers with an original architecture. [less ▲]

Detailed reference viewed: 28 (4 ULg)
See detailPlanktonic Archaea in Lake Kivu
Llirós, Marc; Darchambeau, François ULg; Plasencia, Anna et al

Conference (2007, September 02)

Detailed reference viewed: 3 (2 ULg)
See detailLa dysphonie, diagnostic et traitements
FINCK, Camille ULg

Conference (2007, September)

Detailed reference viewed: 8 (5 ULg)
Peer Reviewed
See detailLearning at school, learning at labour. Some differences, some inequalities
Andre, Géraldine ULg

Conference (2007, September)

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See detailCO emissions of fuel oil boilers in transient and cyclic regimes: performance of burners without and with “antidrip” systems
Makaire, Danielle ULg; Ngendakumana, Philippe ULg

Conference (2007, September)

CO emission peaks from fuel oil boilers in transient and cyclic regimes have been measured in previous studies. In order to evaluate these emissions, tests have been performed without and with an anti ... [more ▼]

CO emission peaks from fuel oil boilers in transient and cyclic regimes have been measured in previous studies. In order to evaluate these emissions, tests have been performed without and with an anti-drip system installed on the burner nozzle. Flue gas composition was measured using classical analysers (CO2, O2, CO and NOx) and CO emissions results were analysed and discussed. It was found that the anti-drip system reduced cold start CO emissions and did not affect steady-state CO emissions. At first, no reduction was noticed when the burner was cycling. Further investigation indicated that there was an experimental artefact caused by an air volume trapped in the pressure measurement system. When the air was purged and with the anti-drip system, CO peaks when the burner was cycling were strongly reduced and CO emissions remained under European standards limits. [less ▲]

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See detailOn the spatial variation of double-sloped decay in coupled-volume concert halls
Billon, Alexis ULg

Conference (2007, September)

In a system of coupled rooms, a double-sloped can be observed in the room containing the source when the coupled room is more reverberant. This decay is formed of a first quick energy decrease due to the ... [more ▼]

In a system of coupled rooms, a double-sloped can be observed in the room containing the source when the coupled room is more reverberant. This decay is formed of a first quick energy decrease due to the first room and a second slower one due to the energy which is fed back from the coupled room. Today, this effect is used to obtain simultaneously clarity and reverberance in concert halls. Parameters to achieve a strong double-sloped decay are now well known. In this preliminary work, the spatial variation of the double decay strength within the concert hall is studied using numerical simulations. Firstly, the indicators quantifying the double decay used in this study are presented. Then, the results of two configurations with the same coupling characteristics but with different coupling area locations are compared. Finally, an empirical model based on the statistical theory is proposed. [less ▲]

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See detailNarrative Songs of the Bruges Lacemakers (1730-1879)
Peere, Isabelle ULg

Conference (2007, September)

A general account of the textual and contextual data on lacemakers' songs provided by Lootens and Feys' song collection, Chants populaires flamands (1879) as a valuable source of information on the ... [more ▼]

A general account of the textual and contextual data on lacemakers' songs provided by Lootens and Feys' song collection, Chants populaires flamands (1879) as a valuable source of information on the complex study of the lacemaking tradition [less ▲]

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See detailL’entreprise à l’envers comme nouvel outil de restructuration : la GRH face à ses paradoxes
Deflandre, Dimitri; Xhauflair, Virginie ULg

Conference (2007, September)

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See detailModelling the sound transmission through separation walls using a diffusion model
Billon, Alexis ULg; Foy, Cédric; Valeau, Vincent et al

Conference (2007, September)

The diffusion model has been used successfully to evaluate the acoustic behaviour of a system of coupled rooms connected through a coupling aperture. In this paper, an extension of this model is proposed ... [more ▼]

The diffusion model has been used successfully to evaluate the acoustic behaviour of a system of coupled rooms connected through a coupling aperture. In this paper, an extension of this model is proposed to deal with the propagation of sound energy through a partition wall. The diffusion model can be considered as an extension of the statistical theory to none diffuse sound fields. Numerical comparisons with the statistical theory are then carried out. The following parameters are varied: its transmission loss of the separation wall, its surface, the coupled room’s absorption coefficient and the coupled room’s volume. The agreement between the statistical theory and the diffusion model is very good. [less ▲]

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See detailLa Flexicurité revisitée à l’aune des pratiques effectives
Xhauflair, Virginie ULg; Pichault, François ULg

Conference (2007, September)

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See detailAeroacoustics coupling of a misaligned jet-slot-oscillator with non-planar modes of a resonator
Glesser, Martin; Billon, Alexis ULg; Valeau, Vincent et al

Conference (2007, September)

The impingement of a plane jet on a slotted plate produces a “jet-slot oscillator” emitting acoustic tones. The coupling of such tones with high-order acoustic resonances of the flow-supply duct (i.e ... [more ▼]

The impingement of a plane jet on a slotted plate produces a “jet-slot oscillator” emitting acoustic tones. The coupling of such tones with high-order acoustic resonances of the flow-supply duct (i.e., above the first transverse mode cut-off frequency) is studied experimentally , in the particular case where the jet-exit and the obstacle are misaligned in the spanwise direction. An experimental set-up based on microphones and hot-wire probes is used to investigate the effect of the slot angle on the sound production mechanism. The aligned jet-slot oscillator is first studied, showing that the parallelism between the jet exit and the slot imposes the excitation of planar modes of the resonator only. Conversely, the misaligned jet-slot oscillator appears to be coupled with a combination of planar and transverse modes. The induced spanwise variation of the acoustic field phase has two consequences. First, it compensates the difference of vortices convection time in the spanwise direction, due to the obstacle misalignment. Second, it enhances the spanwise coherence of the aeroacoustic source produced by the jet-slot interaction: the vortex-tubes are shed in an oblique direction which tends to be parallel to the obstacle. [less ▲]

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See detailPolicy, lived experience and research on career-long professional preparation for PE teachers in Wallonia
Cloes, Marc ULg

Conference (2007, September)

This presentaiton was focused on three major questions: A brief description of the landscape of the PETPD in Wallonia including details about the regulations; Illustration of activities proposed in this ... [more ▼]

This presentaiton was focused on three major questions: A brief description of the landscape of the PETPD in Wallonia including details about the regulations; Illustration of activities proposed in this region, and; Summarizing of some research results [less ▲]

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See detailHeat Pumping and Reversible Air Conditioning: Retrofit opportunities in a laboratory building
Aparecida Silva, Cleide; Bertagnolio, Stéphane ULg; Hannay, Jules et al

Conference (2007, September)

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See detailCondizioni per una tipologia dei discorsi universitari
Defays, Jean-Marc ULg

Conference (2007, September)

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See detailFeasibility study of the diluted combustion in a semi-industrial boiler at low temperatures
Seggio, Giovanni; Ngendakumana, Philippe ULg; Pesenti, Barbara et al

Conference (2007, September)

The aim of this work is to assess the technical feasibility and highlight the specific problem of application of diluted (or mild) combustion in a medium scale boiler by direct gas injection. The main ... [more ▼]

The aim of this work is to assess the technical feasibility and highlight the specific problem of application of diluted (or mild) combustion in a medium scale boiler by direct gas injection. The main difficulty is due to the high geometrical confinement and heat losses of a typical boiler combustion chamber, which prevents from getting the minimum level of reactants dilution and temperature needed to reach mild combustion regime. Last year, a preliminary CFD study was performed to select a jet burner and secondary gas injector able to generate sufficient dilution and temperature of the air and gas jets before they meet in the combustion chamber of the boiler. In this work, the optimization of the position and the diameter of the gas injector has been performed. Finally, the boundary conditions and the parameters of the combustion model have been investigated. [less ▲]

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See detailDiffusion-based models for predicting sound fields in rooms with mixed specular and diffuse reflection
Foy, Cédric; Billon, Alexis ULg; Valeau, Vincent et al

Conference (2007, September)

A diffusion model, based on the numerical solution of a diffusion equation, was developed in the past to give accurate predictions of the sound-pressure level and of the sound decay at any location in a ... [more ▼]

A diffusion model, based on the numerical solution of a diffusion equation, was developed in the past to give accurate predictions of the sound-pressure level and of the sound decay at any location in a single enclosure or in coupled rooms. However, this model is limited to rooms with diffusely reflecting walls. In this study, two methods are presented to extend this model to rooms with mixed specular and diffuse reflections, defined by the classical room-acoustics scattering coefficient. The first method models the reverberant field by using a modified diffusion process, with an empirical diffusion constant departing from the theoretical one based on the mean free path. The set of these coefficients, which depend on the scattering coefficient, has been found empirically to fit the results given by a ray-tracing program. The second method is a hybrid approach. The reverberant sound field due to the diffuse reflections is first obtained with the original diffusion model. Then the sound field due to the specular reflections is modelled with an image-source model. The results given by the two approaches are compared to experimental data obtained for several types of rooms (a classroom, an office and some long rooms). [less ▲]

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See detailThe business failure process : towards an integrative model of the literature
Crutzen, Nathalie ULg; Van Caillie, Didier ULg

Conference (2007, September)

Considering the fragmented literature dedicated to business failure prevention and considering the need for a unifying conceptual framework on how and why companies fail, the aim of this paper is to ... [more ▼]

Considering the fragmented literature dedicated to business failure prevention and considering the need for a unifying conceptual framework on how and why companies fail, the aim of this paper is to gather the findings from the multiple studies focused on the identification of failure factors and of failure paths, in order to propose a unifying model showing the chronological combination of the diverse factors leading a company to bankruptcy. An in-depth analysis of the existing literature and of its limitations leads us to the elaboration of an original integrative model on how and why companies fail. It is founded on a resource-based view of the firm (Wernerfelt, 1984) and it represents the different general phases through which a company goes by in its evolution towards its juridical failure. Moreover it emphasizes the fact that all companies do not necessarily follow the same paths before they disappear (Argenti, 1976). [less ▲]

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See detailThe clinic of anger : from psychopathology to the adequacy of punishment
Philippe, Paule ULg; Scholl, Jean-Marc ULg

Conference (2007, August 27)

Not every fit of anger is good. But some are not to be avoided either. And fits of anger have not all the same aetiology. The authors try to understand the various psychopathological and\or ... [more ▼]

Not every fit of anger is good. But some are not to be avoided either. And fits of anger have not all the same aetiology. The authors try to understand the various psychopathological and\or neuropsychological mechanisms that could explain anger whether in babies, children, teenagers or adults. Anger can arise from the feeling of being overwhelmed – coming by an overflow of the possibilities of management of the ego – (¬¬as a consequence of excessive intake of sensory or emotional information, of hypersensitivity…), from an unstable self-image (see-saw from a positive self-image to a negative one), from an overvalued self-image (narcissistic or megalomaniac personality) or from an undervalued self-image (depressive disorders), from a "Uneasiness in the Situation of Being Alone" (search for link), from great impulsiveness (15% of ADHD), from the incomprehension of the conversational partner (deficit of interpersonal perceptions); anger can also arise from projections (paranoid ones or others), from incomprehension (problems of intelligence, language, culture..) and\or from the refusal of the limits (well or inappropriately imposed, always the same ones or variable). Anger can sometimes be a warning sign of maltreatment disorder that has to be listened to. Considering these various mechanisms, it seems important to reflect on how to adapt punishments: corporal punishment? shaming? placing at a distance? restraining? isolation? task of repairing? … Their purpose must be to help the child to have better control of his/her behaviour and a better self-image. This reflection comes within the context of a psychotherapeutic approach with the parent’s cooperation and\or cooperation of the people in charge of the child. The added value of medication is also considered (methylphenidate, antidepressant, atypical antipsychotic drugs, mood stabilisers…). An appropriate treatment provides child as well as home environment with relief and so allows moving on to other problematic components of the situation in the psychotherapeutic approach. Toutes les colères ne sont pas bonnes. Mais toutes les colères ne sont pas non plus à éviter. Et toutes les colères n’ont pas les mêmes étiologies. Les auteurs cherchent à comprendre les différents mécanismes psychopathologiques et/ou neuropsychologiques qui pourraient sous-tendre les colères, que ce soit chez les bébés, les enfants, les adolescents ou les adultes. Les colères peuvent naître d’un débordement des possibilités de la gestion du moi (suite à un apport excessif d’informations sensorielles ou émotionnelles, d’une hypersensibilité,…), d’une image de soi instable (bascule d’une image positive vers une image négative de soi) ou sur-valorisée (trait de personnalité narcissique, trait mégalomaniaque), ou dévalorisée (image dépressive de soi), d’un "Mal-être en situation d’être seul" (recherche d’un lien), d’une grande impulsivité (15 % des ADHD…), d’une incompréhension de l’interlocuteur (déficit des perceptions intersubjectives), ou encore naître de projections (paranoïdes ou autres), de l’incompréhension (problème d’intelligence, de langue, de culture…) et/ou du refus des limites (bien ou mal posées, toujours les mêmes ou changeantes…). Et elles sont parfois un signal d’alarme de maltraitance qu’il faut aussi entendre. Face à ces différents mécanismes, il paraît important de réfléchir à comment ajuster les punitions: punition physique ? humiliation ? répression ? mise à distance? contention? isolement? tâche de réparation, de remise en lien ?… Elles chercheront à aider l’enfant à garder un meilleur contrôle de son comportement et une meilleure image de lui. Cette réflexion s’inscrit dans une approche psychothérapeutique avec la collaboration des parents et/ou des responsables de l’enfant. L’intérêt d’une médication ajoutée (méthylphénidate, antidépresseurs, antipsychotiques atypiques, régulateurs de l’humeur….) est également envisagé. Une prise en charge bien adaptée apporte alors un apaisement tant pour l’enfant que pour le milieu de vie et permet ensuite d’aborder en psychothérapie d’autres composantes problématiques de la situation. [less ▲]

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See detail« “Unease in the Situation of Being Alone” and “Separation Anxiety”: Semeiology from Early Childhood to Adolescence. »
Scholl, Jean-Marc ULg

Conference (2007, August 27)

The following presents the results of a semeiological study of 170 children that has enabled us to identify a condition that we call “Unease in the Situation of Being Alone.” As the name suggests, the ... [more ▼]

The following presents the results of a semeiological study of 170 children that has enabled us to identify a condition that we call “Unease in the Situation of Being Alone.” As the name suggests, the essence of this condition is a feeling of unease that appears when the subject is alone. This sense of unease develops according to the following pattern: Already as an infant, the subject requires the presence of another person in order to be able to fall asleep. At around 2.5 years, with the beginning of schooling away from home, the child has difficulties accepting separation from his or her parents. At around 5 years, the child shows an aversion to playing alone without the presence of another person or an animal; if he or she does play alone, then he or she will constantly ask where the adult is. With the onset of sleep, the child often calls out to his or her parents, and will sometimes even leave his or her bedroom or ask to sleep with the parents. At around 8 years, he or she will have no longer have any difficulties in leaving the house and the immediate presence of his or her parents, for example to go to play with neighbourhood friends. Nevertheless, he or she will be ill at ease if one of the parents should leave the house temporarily. At around 9 years, the child begins to display the typical adult symptomology, which consists in a vague feeling of unease that descends prior to falling asleep. The adult has trouble verbalizing this feeling, which is in fact unaccompanied by any representational content; the best description he or she can manage is to speak of an empty “void” or a “nothingness.” He or she tries to delay going to sleep, say by reading in bed, in order to avoid this feeling. He or she will also try to wear himself or herself out, so as to be able to fall asleep quickly. The adult who feels this “uneasiness” during the day will counter it by one or more of the following 4 means: 1. various activities; 2. sensory input (for example, keeping the radio or TV switched on); 3. filling his or her "internal world" (for example, by reading); 4. a pet. Some conclusions and hypotheses regarding “Unease in the Situation of Being Alone”: A) It should be distinguished from Separation Anxiety; B) It correlates with a delayed appearance of the ability to grasp temporal landmarks. Note, however, that this delay does not concern the understanding of time-sequencing, or of objective notions of time, but rather affects the subjective apprehension of time. The subject is deficient in developing what we might call a “foretaste” of how long a certain period of time will last. C) Hypothesis: This condition is related to a malfunctioning of the neurophysiological platform that serves as the physiological basis for the evaluation of duration, or the internal gauge by which we anticipate temporal duration. D) This hypothesis would help to explain why “mental representations” are insufficient to enable the child to acquire the subjective feeling of “permanent” selfhood, precisely because he is deficient in an internal feeling for temporal duration. E) The condition that we have described is systematically present in cases of bipolarity, even though it is not pathognomic for bipolarity. It is found both in an isolated state and in other nosological entities. At a minimum, it is a simple characteristic of the person affected. [less ▲]

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See detailFoams of polycaprolactone/MWNT nanocomposites for efficient EMI shielding
Thomassin, Jean-Michel ULg; Kollar, J.; Caldarella, Giuseppe ULg et al

Conference (2007, August 27)

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See detailFirst results of body condition score modeling for Walloon Holstein cows
Bastin, Catherine ULg; Laloux, Laurent; Gillon, Alain ULg et al

Conference (2007, August 25)

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See detailUsing Survey Data to Resolve the Exchange Risk Exposure Puzzle
Muller, Aline ULg; Verschoor, Willem; Jongen, Ron

Conference (2007, August 24)

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See detailJupiter’s polar auroral emissions-signatures of magnetic reconnection
Radioti, Aikaterini ULg; Gérard, Jean-Claude ULg; Grodent, Denis ULg et al

Conference (2007, August 23)

The polar auroral emissions at Jupiter can be divided into three regions fixed in mag- netic local time: the dawnside dark region, the poleward swirl region and the duskside active region in which flares ... [more ▼]

The polar auroral emissions at Jupiter can be divided into three regions fixed in mag- netic local time: the dawnside dark region, the poleward swirl region and the duskside active region in which flares and arc-like features are observed. Previous studies re- lated the polar emissions to the solar wind driven Dungey cycle and Vasyliunas flow cycle. Based on HST STIS and ACS images we study extensively the time variations of the morphology and brightness of various polar auroral features as well as their duration and reoccurrence. We magnetically map their location in the equatorial plane and we compare their spatial size and time scales with the reconnection events taking place in the Jovian magnetotail. We discuss the possibility that some polar auroral features are signatures of magnetic reconnection. [less ▲]

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