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See detailToward a fundamental understanding of the Hilbert-Huang Transform in nonlinear dynamics
Kerschen, Gaëtan ULg; Vakakis, Alexander F.; Lee, Y. S. et al

in Journal of Vibration & Control (2008)

The Hilbert–Huang transform(HHT) has been shown to be effective for characterizing a wide range of nonstationary signals in terms of elemental components through what has been called the empirical mode ... [more ▼]

The Hilbert–Huang transform(HHT) has been shown to be effective for characterizing a wide range of nonstationary signals in terms of elemental components through what has been called the empirical mode decomposition (EMD). The HHT has been utilized extensively despite the absence of a serious analytical foundation, as it provides a concise basis for the analysis of strongly nonlinear systems. In this paper, an attempt is made to provide the missing theoretical link, showing the relationship between the EMD and the slow-flow equations of a system. The slow-flow reduced-order model is established by performing a partition between slow and fast dynamics using the complexification-averaging technique in order to derive a dynamical system described by slowly-varying amplitudes and phases. These slow-flow variables can also be extracted directly from the experimental measurements using the Hilbert transform coupled with the EMD. The comparison between the experimental and analytical results forms the basis of a novel nonlinear system identification method, termed the slow-flow model identification (SFMI) method. Through numerical and experimental application examples, we demonstrate that the proposed method is effective for characterization and parameter estimation of multi-degree-of-freedom nonlinear systems. [less ▲]

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See detailImplications and priorities of tobacco control in Belgium and Europe
Bartsch, Pierre ULg

in European Respiratory Review (2008), 17(110), 205-208

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See detailLe jugement éthique: le cas du pardon
Dondero, Maria Giulia ULg

in Protée Revue internationale de théories et de pratiques sémiotiques (2008), 36(2), 27-38

Cet article aborde l’étude sémiotique des pratiques du pardon en relation aux pratiques institutionnelles et juridiques de l’amnistie en partant d’une distinction entre jugement éthique et jugement moral ... [more ▼]

Cet article aborde l’étude sémiotique des pratiques du pardon en relation aux pratiques institutionnelles et juridiques de l’amnistie en partant d’une distinction entre jugement éthique et jugement moral afin de lier le discours sur la subjectivité au discours sur les domaines culturels tels le droit et la juridiction. Cette étude met en évidence que la dimension éthique est suspendue entre l’institutionnalisation des valeurs (protocole, procédure, loi) et l’autoréglage du sujet agent (pratiques d’autoréflexion et gestion de soi-même) : c’est une dimension qui fait en sorte que le sens reste toujours questionnable. L’imperfectivité de la clôture sémantique (le « pourquoi » de l’action) entraîne toute pratique éthique à une nécessité de se « justifier », et surtout, au devoir de rendre compte de son fondement dans la durée. Tout cela met la décision au cœur de l’éthique des pratiques, c’est-à-dire une négociation de la pratique sur son propre bien-fondé, son « caractère sensé », dans une tension interprétative qui connecte la motivation à la loi. Dans le régime de l’éthique un besoin de reconnaissance réciproque existe, telle la reconnaissance réciproque et publique de la culpabilité et du pardon. C’est pourquoi ce travail étudie la relation entre victime et coupable, relation qui ne touche pas seulement à la relation intime entre les deux, ni seulement aux pratiques de sanctions juridiques, mais aussi aux jugements de l’opinion publique, voire de la doxa, car c’est cette dernière qui encadre la relation et construit les frontières entre le pardonnable et l’impardonnable. [less ▲]

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See detailContours statistiques des sociétés de l'économie sociale
Mertens de Wilmars, Sybille ULg; dujardin, Anne

in E-Note (2008), 6

L'article dresse les contours statistiques des deux ensembles de sociétés que l'on trouve dans le secteur de l'économie sociale : les sociétés coopératives agréées par le Conseil National de la ... [more ▼]

L'article dresse les contours statistiques des deux ensembles de sociétés que l'on trouve dans le secteur de l'économie sociale : les sociétés coopératives agréées par le Conseil National de la Coopération et les sociétés à finalité sociale. En utilisant les données reprises dans les grands fichiers statistiques officiels, il permet de situer ces organisations dans le contexte macroéconomique belge. [less ▲]

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See detailPurification and characterization of a carboxylesterase involved in malathion-specific resistance from Tribolium castaneum (Coleoptera: Tenebrionidae).
Amichot, Marcel; Haubruge, Eric ULg; Bergé, Jean-Baptiste et al

in Insect Biochemistry and Molecular Biology (2008), 32

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See detailValorisation of Microsimulation Model for Social Security Mimosis
Decoster, André; Maréchal, Claire; Paszukiewicz, Alexis ULg et al

Report (2008)

This report is part of the output of the project AG/01/116. The main objectives of project AG/01/116 were to further refine and validate the microsimulation model for social security, MIMOSIS, both by ... [more ▼]

This report is part of the output of the project AG/01/116. The main objectives of project AG/01/116 were to further refine and validate the microsimulation model for social security, MIMOSIS, both by extending the data coverage and refining the modules as through a comparative study of how MIMOSIS is positioned in an international perspective and also by use of MIMOSIS for evaluation of (hypothetical) policy reforms. [less ▲]

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See detailProbing Peptide-Membrane Interactions Using Afm
Brasseur, Robert ULg; Deleu, Magali ULg; Mingeot-Leclercq, Mp. et al

in Surface and Interface Analysis [=SIA] (2008), 40(3-4), 151-156

Atomic force microscopy (AFM) has become a powerful addition to the range of instruments available to probe the organization of lipid monolayers and bilayers. Currently, AFM is the only tool that can ... [more ▼]

Atomic force microscopy (AFM) has become a powerful addition to the range of instruments available to probe the organization of lipid monolayers and bilayers. Currently, AFM is the only tool that can provide nanoscale topographic images of supported lipid membranes under physiological conditions, enabling researchers to resolve their detailed structure and to monitor their interaction with drugs, peptides and proteins. Here, we survey recent data obtained by our research groups that demonstrate the power of the technique for exploring peptide–membrane interactions, with an emphasis on microbial lipopeptides and on tilted peptides. [less ▲]

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See detailExperimental validation of a kinetic multi-component mechanism in a wide HCCI engine operating range for mixtures of n-heptane, iso-octane and toluene: Influence of EGR parameters
Machrafi, Hatim ULg

in Energy Conversion And Management (2008), 49(11), 2956-2965

The parameters that are present in exhaust gas recirculation (EGR) are believed to provide an important contribution to control the auto-ignition process of the homogeneous charge compression ignition ... [more ▼]

The parameters that are present in exhaust gas recirculation (EGR) are believed to provide an important contribution to control the auto-ignition process of the homogeneous charge compression ignition (HCCI) in an engine. For the investigation of the behaviour of the auto-ignition process, a kinetic multi-component mechanism has been developed in former work, containing 62 reactions and 49 species for mixtures of n-heptane. iso-octane and toluene. This paper presents an experimental validation of this mechanism, comparing the calculated pressure, heat release, ignition delays and CO2 emissions with experimental data performed on a HCCI engine. The validation is performed in a broad range of EGR parameters by varying the dilution by N-2 and CO2 from 0 to 46vol.%, changing the EGR temperature from 30 to 120 degrees C, altering the addition of CO and NO from 0 to 170 ppmv and varying the addition of CH2O from 0 to 1400 ppmv. These validations were performed respecting the HCCI conditions for the inlet temperature and the equivalence ratio. The results showed that the mechanism is validated experimentally in dilution ranges going up to 21-30 vol.%, depending on the species of dilution and over the whole range of the EGR temperature. The mechanism is validated over the whole range of CO and CH2O addition. As for the addition of NO, the mechanism is validated quantitatively up to 50 ppmv and qualitatively up to 170 ppmv. (C) 2008 Elsevier Ltd. All rights reserved. [less ▲]

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See detailAperçu général de la bande dessinée francophone actuelle
Lefèvre, Pascal; Meesters, Gert ULg

in Relief : Revue Electronique de Littérature Française (2008), 2(3), 290-308

Dans cet article, nous présenterons un aperçu général de la bande dessinée francophone actuelle. Dans un premier temps, nous aborderons le marché et les évolutions du marché. Puis nous aborderons quelques ... [more ▼]

Dans cet article, nous présenterons un aperçu général de la bande dessinée francophone actuelle. Dans un premier temps, nous aborderons le marché et les évolutions du marché. Puis nous aborderons quelques tendances marquantes au niveau du contenu de la bande dessinée actuelle. Ensuite, nous traiterons des influences internationales sur la bande dessinée francophone. Nous conclurons que la bande dessinée francophone a été marquée ces dernières années par une diversification importante. [less ▲]

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See detailProteolytic Breakdown Of Gliadin By Enterococcus Faecalis Isolated From Tunisian Fermented Dough
M'Hir, S.; Aldric, Jean-Marc ULg; El Mejdoub, Thami ULg et al

in World Journal of Microbiology & Biotechnology (2008), 24(12),

The aim of this work was to select strains with proteolytic activity on wheat gliadin, among lactic acid bacteria, previously isolated from Tunisian fermented wheat dough. Hydrolysis of gliadin, as sole ... [more ▼]

The aim of this work was to select strains with proteolytic activity on wheat gliadin, among lactic acid bacteria, previously isolated from Tunisian fermented wheat dough. Hydrolysis of gliadin, as sole nitrogen source, in an agar medium was visualized by a clear zone surrounding colonies. The increase in absorbance due to gliadin breakdown was measured spectrophotometrically using Ophthaldialdehyde (OPA) on Gliadin Glucose Broth medium. Fermented liquid dough inoculated with individual selected Enterococcus faecalis, showed a decrease of the gliadin concentration from 45 g/kg to 18 g/kg determined by sandwich ELISA test (R-7001). Only the enterococci strains show an hydrolysis of gliadin proteins. Strains showing proteolytic activity are gaining more and more importance in cereal based fermented foods and may help to reduce gliadin involved in coeliac disease. [less ▲]

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See detailQuatre ans d'application de la loi de depenalisation de l'euthanasie en Belgique
Burette, Philippe ULg; Bouüaert, Corine ULg; Vanmeerbeek, Marc ULg et al

in Presse Médicale (2008), 37(9), 1281-8

Legislation decriminalizing euthanasia came into effect in Belgium in 2002. Its application is monitored by a federal Commission, which submitted 2 reports to the Parliament, one covering the first 15 ... [more ▼]

Legislation decriminalizing euthanasia came into effect in Belgium in 2002. Its application is monitored by a federal Commission, which submitted 2 reports to the Parliament, one covering the first 15 months of application and the other the years 2004 and 2005. This article analyzes and comments on the contents of these 2 documents, which provide interesting information on the medical practice of euthanasia in Belgium. [less ▲]

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See detailNumerical simulation of an in-situ underground experiment for nuclear waste storage
Laloui, Lyesse; François, Bertrand ULg

in 12th IACMAG Conference (2008)

Following the need for understanding and quantifying the effect of temperature on the response of a candidate host formation for radioactive waste disposal, finite element modelling of an in-situ thermal ... [more ▼]

Following the need for understanding and quantifying the effect of temperature on the response of a candidate host formation for radioactive waste disposal, finite element modelling of an in-situ thermal experiment, named ATLAS, has been carried out. Based on a thermo-hydro-mechanical (THM) finite element approach including a consistent thermo-plastic constitutive model, it has been possible to reproduce the THM response of a clay formation submitted to in-situ thermal loading carried out in the underground research facility (HADES-URF) in Mol, Belgium. The results of the finite element modelling of the ATLAS experiment were compared with in-situ measurements and revealed the necessity to account for flow diffusion in all three directions through a 2D axisymmetric analysis. Finally, those results were interpreted in the light of elasto-thermoplasticity, which emphasizes the significant role of thermo-plastic processes in the global THM response of the clay formation. [less ▲]

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See detailRecensement Pédestre Des Grands Mammifères De la Zone de Chasse de Konkombouri. Burkina Faso. Mai 2008
Bouché, Philippe ULg

Report (2008)

La Zone de Chasse de Konkombouri (ZCK) est une des zones de grande chasse du Burkina Faso qui couvre 655 km² et fait partie de l’écosystème WAP. La ZCK a fait l’objet d’un inventaire pédestre par transect ... [more ▼]

La Zone de Chasse de Konkombouri (ZCK) est une des zones de grande chasse du Burkina Faso qui couvre 655 km² et fait partie de l’écosystème WAP. La ZCK a fait l’objet d’un inventaire pédestre par transect en ligne en mai 2006. Cet inventaire est le 3ème d’une série débuté en 2002, parallèlement à un suivi écologique démarré depuis 2003. Les principaux résultats obtenus au cours de cet inventaire sont les suivants : Globalement la ZCK accueille une densité globale de plus de 47 animaux/km² pour une biomasse/km² totale de plus de 15100 kg/km². Ces résultats portent la ZCK à un niveau de référence en Afrique. [less ▲]

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See detailProbable microfossils in 3.2 Ga-old shallow-water siliciclastic deposits
Javaux, Emmanuelle ULg; Marshall, Craig; Bekker, Andrey

Conference (2008)

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