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See detailPresentation of the report about degradation inhibitors and metal additives impact on solvent degradation
Léonard, Grégoire ULg

Report (2012)

Literature review about impact of additives on solvent degradation

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See detailEngineering geological mapping in Wallonia (Belgium) : present state and recent computerized approach
Delvoie, Simon ULg; Radu, Jean-Pol ULg; Ruthy, Ingrid ULg et al

Poster (2012, April)

An engineering geological map can be defined as a geological map with a generalized representation of all the components of a geological environment which are strongly required for spatial planning ... [more ▼]

An engineering geological map can be defined as a geological map with a generalized representation of all the components of a geological environment which are strongly required for spatial planning, design, construction and maintenance of civil engineering buildings. In Wallonia (Belgium) 24 engineering geological maps have been developed between the 70s and the 90s at 1/5,000 or 1/10,000 scale covering some areas of the most industrialized and urbanized cities (Liège, Charleroi and Mons). They were based on soil and subsoil data point (boring, drilling, penetration test, geophysical test, outcrop. . . ). Some displayed data present the depth (with isoheights) or the thickness (with isopachs) of the different subsoil layers up to about 50 m depth. Information about geomechanical properties of each subsoil layer,useful for engineers and urban planners, is also synthesized. However, these maps were built up only on paper and progressively needed to be updated with new soil and subsoil data. The Public Service of Wallonia and the University of Liège have recently initiated a study to evaluate the feasibility to develop engineering geological mapping with a computerized approach. Numerous and various data (about soil and subsoil) are stored into a georelational database (the geotechnical database – using Access, Microsoft®). All the data are geographically referenced. The database is linked to a GIS project (using ArcGIS, ESRI®). Both the database and GIS project consist of a powerful tool for spatial data management and analysis. This approach involves a methodology using interpolation methods to update the previous maps and to extent the coverage to new areas. The location (x, y, z) of each subsoil layer is then computed from data point. The geomechanical data of these layers are synthesized in an explanatory booklet joined to maps. [less ▲]

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See detailRèglement 1346/2000 relatif aux procédures d'insolvabilité
Wautelet, Patrick ULg; Leunen, Charles-Antoine

in van Drooghenbroeck, Jean-François (Ed.) Droit judiciaire européen et international (2012)

This paper presents an overview of court practice in relation to Regulation 1346/2000. The focus is on cases decided by the ECJ, Belgian and French courts. Reference is also made to the most important ... [more ▼]

This paper presents an overview of court practice in relation to Regulation 1346/2000. The focus is on cases decided by the ECJ, Belgian and French courts. Reference is also made to the most important cases decided by English courts. Cases are presented and discussed in relation to the various provisions of the Regulation to which they relate. For each case, an abstract is included, followed by (critical) comments. This overview appeared in a book presenting the main European regulations dealing with European procedural law (jurisdiction of courts, recognition and enforcement of foreign judgments). The book is part of a series edited by Prof. Georges de Leval (University of Liège), which collects court practice in relation to procedural law. [less ▲]

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See detailETAPE - Rapport d’évaluation des résultats
Vanmeerbeek, Marc ULg; Bednarek, Stéphanie; Lachaussée, Sophie et al

Report (2012)

Contexte et objectifs ETAPE est un programme d’intervention précoce à domicile au bénéfice de familles à risque de négligence parentale. Le programme prend en charge des enfants de 0 à 30 mois, ainsi que ... [more ▼]

Contexte et objectifs ETAPE est un programme d’intervention précoce à domicile au bénéfice de familles à risque de négligence parentale. Le programme prend en charge des enfants de 0 à 30 mois, ainsi que leurs parents, au rythme d’une à deux visites à domicile par semaine. L’intervention consiste en des massages du bébé, des jeux psychomoteurs. Un temps important est en outre consacré à l’accompagnement et à la guidance du rôle parental. L’originalité du projet est qu’il est centré sur le développement psychomoteur et affectif du bébé en lien avec son ou ses parents. L’étude cherche à mesurer l’efficacité du programme en termes de développement psychomoteur de l’enfant, de qualité d’attachement au sein de la dyade parent-enfant et de compétences éducatives des parents. Méthodologie Les aptitudes psychomotrices de l’enfant ont été mesurées au moyen du test de Brunet et Lézine modifié, au début, en milieu et en fin d’intervention. Le caractère sécure ou non de l’attachement a été mesuré chez le caregiver par Q-Sort en début et en fin d’intervention. Les compétences parentales ont été évaluées tous les six mois durant l’intervention au moyen d’un questionnaire développé par l’équipe de recherche en 2008 (MASPIN) et complété par les intervenants sur base de leurs observations. Résultats Douze enfants ont été étudiés. Les trois quarts ont été pris en charge avant 1 an ; la durée moyenne d’intervention est de 11,3 mois. En moyenne, les enfants gagnent nettement en score de développement moteur global, gagnent un peu en socialisation, sont stables en développement moteur fin. La plupart régressent au score de langage, ce qui influence négativement le score global de développement. Deux enfants sur douze sont sécures au début et à la fin de l’intervention (mais ce ne sont pas les mêmes). Aucun ne termine l’intervention significativement insécurisé, mais la relation dans la dyade n’est en général pas optimale. Les résultats de MASPIN permettent d’étoffer les autres résultats obtenus et de mieux comprendre l’évolution au cas par cas. Discussion Les résultats, mesurés par les tests de Brunet-Lézine et le Q-Sort semblent modestes dans certains domaines, mais doivent être analysés à la lumière des conditions d’intervention. MASPIN a donné une vue beaucoup plus précise de la réalité et de son évolution. Ce questionnaire a aussi permis de monitorer l’intervention. Toutefois, la finesse des observations et l’aspect subjectif de la cotation empêchent une analyse globale des résultats ; la fidélité intercotateur doit encore être validée. MASPIN permet en outre de donner des repères pour le dialogue avec d’autres professionnels impliqués dans le suivi des situations, et fournit un canevas qui facilite la discussion avec les familles sur l’exercice de la parentalité et les objectifs d’intervention. L’analyse des résultats permet de prendre conscience que certaines compétences (par ex., le langage) méritent d’être mieux soutenues et stimulées par les intervenants de terrain.) Des collaborations extérieures devront être développées (par ex : psychologue, aide sociale). L’investissement requis de la part des intervenants est important. Le risque de découragement est grand ; ils doivent être soutenus et supervisés de façon efficace dans ce travail. L’instauration d’un vrai esprit d’équipe est indispensable Conclusion Le rendement de ce programme, destiné à un public particulièrement difficile, est intéressant mais variable selon les situations prises en charge, que ce soit en termes de développement psychomoteur ou d’attachement à la figure parentale. L’outil MASPIN se révèle précieux dans de multiples aspects de la prise en charge, depuis le dialogue avec les professionnels qui identifient la situation, jusqu’au monitorage des objectifs au fil de l’intervention, en passant par la construction des objectifs d’intervention avec les parents. [less ▲]

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See detailUnderstanding of the Venus upper atmosphere dynamics with O2(a1 ) Venus Express observations
Soret, Lauriane ULg; Gérard, Jean-Claude ULg; Piccioni, Giuseppe et al

Poster (2012, April)

The O2(a1 ) nightglow emission at 1.27 m may be used as a tracer of the dynamics prevailing in the Venusian upper mesosphere. This emission has thus been observed with ground-based telescopes and from ... [more ▼]

The O2(a1 ) nightglow emission at 1.27 m may be used as a tracer of the dynamics prevailing in the Venusian upper mesosphere. This emission has thus been observed with ground-based telescopes and from space with instruments such as VIRTIS on board Venus Express. Observations have shown that the emission maximum is statistically located close to the antisolar point at 96 km. As originally suggested by Connes et al. (1979), such an emission results from the production of oxygen atoms on the Venus dayside by photodissociation and electron impact dissociation of CO2 and CO, which are then transported to the nightside by the subsolar to antisolar general circulation, where they recombine to create excited O2(a1 ) molecules. Their radiative deexcitation produces the O2(a1 ) nightglow with a maximum near the antisolar point. However, VIRTIS observations indicate that the O2(a1 ) nightglow emission is highly variable, both in intensity and location. Actually, when considering individual observations, the patch of bright emission is rarely located at the antisolar point and the brighter area around this point is the result of statics accumulation. Also, when considering several individual observations acquired in a short period of time, it is possible to follow an individual emission patch and to deduce its displacement and its brightness variation due to activation or deactivation. In this study, we analyze several sequences of VIRTIS observations in order to understand the Venus upper mesosphere dynamics.We show that the intensity can vary by several megaRayleighs in a couple of hours with effective lifetimes on the order of several hours. The horizontal motion of the spots leads to the conclusion that winds in the 95-100 km region are in the range of 25 to 150 m s-1, in good agreement with the study by Hueso et al. (2008). [less ▲]

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See detailLa médiation scolaire. Un regard des acteurs sur leurs pratiques
Kuty, Olgierd ULg; Schoenaers, Frédéric ULg; Dubois, Christophe ULg et al

Book published by Presses Universitaires de Liège (2012)

Dans nos sociétés en réseaux qui se caractérisent par un pluralisme normatif, on peut faire société sans partager des valeurs communes. Le fonctionnement des institutions scolaires illustre les nouveaux ... [more ▼]

Dans nos sociétés en réseaux qui se caractérisent par un pluralisme normatif, on peut faire société sans partager des valeurs communes. Le fonctionnement des institutions scolaires illustre les nouveaux modes de régulation des tensions, de la diversité, de l'intégration, etc. désormais à l’œuvre. C'est dans ce contexte que le concept de médiation a fait son apparition dans nos écoles, comme dispositif d'apaisement ou de maintien du lien social. La diffusion de tels dispositifs doit beaucoup à la création de services centraux puis locaux de médiation, tout comme au travail de nombreux médiateurs qui ont progressivement investi le champ scolaire. Cet ouvrage constitue une exploration du développement de leur fonction et il rend compte de la culture professionnelle qui les anime. Cette exploration conduit à s'interroger sur le processus de diffusion de la médiation scolaire tout en contextualisant cette dernière dans le spectre plus large de la médiation en général, un concept désormais répandu dans les champs familiaux, judiciaires, sanitaires, administratifs, politiques et sociaux les plus divers. [less ▲]

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See detailAn oblique view on the role of spindle orientation in vertebrate neurogenesis
Peyre, Elise ULg; Morin, Xavier

in Development, Growth & Differentiation (2012)

Neurogenesis is a dynamic process that produces a diverse number of glial and neural cell types from a limited number of neural stem cells throughout development and into adulthood. After an initial ... [more ▼]

Neurogenesis is a dynamic process that produces a diverse number of glial and neural cell types from a limited number of neural stem cells throughout development and into adulthood. After an initial period of amplification through symmetric division, neural stem cells rely on asymmetric modes of division to self-renew while producing more committed progeny. Understanding the molecular mechanisms regulating the choice between symmetric and asymmetric modes of division is essential to understand human brain development and pathologies, and to explain the increasing cortical complexity observed in evolution. A popular model states the existence of a causal relationship between the orientation of the axis of division of stem cells and the fate of their progeny in many different tissues, but the validity of the model in neural stem cells is not clear. In this review, we briefly present the diversity of neural stem cells and intermediate progenitors in the developing central nervous system. We then draw a historic overview of the assumed causal relationship between spindle orientation and fate determination. We show how this prompted a search for regulators of spindle orientation, and present the current state of knowledge on the mechanism. Finally, we review data on the effect of defective spindle orientation and try to integrate conflicting observations by presenting alternative mechanisms that may regulate the choice between symmetric and asymmetric outcomes. [less ▲]

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See detailThe earthquake sedimentary record in marine sediment from cores in the western part of the Marmara Sea, Turkey
Drab, Laureen; Hubert, Aurelia ULg; Schmidt, Sabine et al

Conference (2012, April)

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See detailGender and leadership
Cornet, Annie ULg

Speech/Talk (2012)

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See detailIntegrated control and structural analysis of DFIG wind turbines using a monolithic approach
Chen, Qiongzhong ULg; D'Ambrosio, Flavio; Defourny, Michel et al

in Proceedings of the European Wind Energy Conference and Exhibition 2012 (EWEA 2012) (2012, April)

Design of wind turbines requires the coupled analysis among the mechanical, control and aerodynamic subsystems. Different from previous research, which either uses a complicated mechanical model with a ... [more ▼]

Design of wind turbines requires the coupled analysis among the mechanical, control and aerodynamic subsystems. Different from previous research, which either uses a complicated mechanical model with a simple control system model, or vice versa, this paper studies the coupling of subsystems’ dynamics using a high-fidelity aeroelastic model of wind turbine and a detailed analytical model of control generating systems. A monolithic time integration approach is applied so that better numerical accuracy and stability are achieved. Control strategies on power optimization are discussed taking into account the influence of structural flexibility. Simulation examples are given on both stable and turbulent wind situation. [less ▲]

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See detailToward a Taxonomy of Key Success Factors for SME’s in a Changing Environment : the case of the Luxury Industry
Riguelle, France ULg; Van Caillie, Didier ULg

in Proceedings of the The 12th IAMB Conference (2012, April)

This paper aims at proposing a synthetic taxonomy of key success factors (KSF) for SME's in the luxury industry. Both typologies of KSF for SME's in overall on the one hand, and for companies of the ... [more ▼]

This paper aims at proposing a synthetic taxonomy of key success factors (KSF) for SME's in the luxury industry. Both typologies of KSF for SME's in overall on the one hand, and for companies of the luxury industry on the other hand, constructed on a basis of a critical literature review regarding the two domains concerned (SME's performance management and performance management of companies of the luxury industry) are gathered to propose a single synthetic taxonomy of KSF for SME's of the luxury industry. [less ▲]

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See detailHigher-Moment Risk Exposures in Hedge Funds
Lambert, Marie ULg; Hübner, Georges ULg; Papageorgiou, Nicolas

Conference (2012, April)

The paper singles out the key roles of US equity skewness and kurtosis in the determination of the market premia embedded in Hedge Fund returns. We propose a conditional higher-moment asset pricing model ... [more ▼]

The paper singles out the key roles of US equity skewness and kurtosis in the determination of the market premia embedded in Hedge Fund returns. We propose a conditional higher-moment asset pricing model with location, trading and higher-moment factors in order to describe the dynamics of the Equity Hedge (Market Neutral, Short Selling and Long/Short strategies), Event Driven, Relative Value, and Funds of Hedge Funds styles. The volatility, skewness and kurtosis implied in the US options markets are used by Hedge Fund managers as instruments to anticipate market movements. Managers should adjust their market exposure in response to variations in the implied higher moments. We show that higher-moment premia improve a conditional asset pricing model both in terms of explanatory power (R-squares and Schwarz criterion) and specification errors across all Hedge Fund styles. [less ▲]

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See detailCarnet de pédiatrie en Afrique: Démonstration de la prise-en-charge du nouveau-né
Battisti, Oreste ULg; Académie américaine de pédiatrie

Learning material (2012)

video reprenant les gestes de prise-en-charge du nouveau-né en salle d'accouchement

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See detailMacroH2A1 regulates the balance between self-renewal and differentiation commitment in embryonic and adult stem cells.
Creppe, Catherine ULg; Janich, Peggy; Cantarino, Neus et al

in Molecular and cellular biology (2012), 32(8), 1442-52

One of the most striking epigenetic alterations that occurs at the level of the nucleosome is the complete exchange of the canonical H2A histones for the macroH2A variant. Here, we provide insight into ... [more ▼]

One of the most striking epigenetic alterations that occurs at the level of the nucleosome is the complete exchange of the canonical H2A histones for the macroH2A variant. Here, we provide insight into the poorly recognized function of macroH2A in transcriptional activation and demonstrate its relevance in embryonic and adult stem cells. Knockdown of macroH2A1 in mouse embryonic stem (mES) cells limited their capacity to differentiate but not their self-renewal. The loss of macroH2A1 interfered with the proper activation of differentiation genes, most of which are direct target genes of macroH2A. Additionally, macroH2A1-deficient mES cells displayed incomplete inactivation of pluripotency genes and formed defective embryoid bodies. In vivo, macroH2A1-deficient teratomas contained a massive expansion of malignant, undifferentiated carcinoma tissue. In the heterogeneous culture of primary human keratinocytes, macroH2A1 levels negatively correlated with the self-renewal capacity of the pluripotent compartment. Together these results establish macroH2A1 as a critical chromatin component that regulates the delicate balance between self-renewal and differentiation of embryonic and adult stem cells. [less ▲]

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See detailL'astronomie dans le monde
Manfroid, Jean ULg

Article for general public (2012)

Collision dans le Dragon; Trou noir de masse intermédiaire;Zoom sur une galaxie lointaine; Les jours de Vénus s’allongent ?; Lumière cendrée; Anomalies magnétiques lunaires; Océan martien; Hercule par le ... [more ▼]

Collision dans le Dragon; Trou noir de masse intermédiaire;Zoom sur une galaxie lointaine; Les jours de Vénus s’allongent ?; Lumière cendrée; Anomalies magnétiques lunaires; Océan martien; Hercule par le VST [less ▲]

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See detailSearching for a theoretical relation between reverberation and the scattering coefficients of surface in a room
Embrechts, Jean-Jacques ULg

in Proceedings of the Acoustics 2012 Nantes conference (2012, April)

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See detailLes polémiques autour de la littérature jeunesse, ou la quête sans cesse rejouée de la légitimité
Barnabé, Fanny ULg

in COnTEXTES : Revue de Sociologie de la Littérature (2012), (10),

Cet article analyse les enjeux dissimulés derrière une polémique qui a débuté suite à un article de François Busnel, publié le 24 novembre 2010 dans l’Express-Lire, dans lequel ce dernier dénigre la ... [more ▼]

Cet article analyse les enjeux dissimulés derrière une polémique qui a débuté suite à un article de François Busnel, publié le 24 novembre 2010 dans l’Express-Lire, dans lequel ce dernier dénigre la littérature jeunesse et l’accuse de n’être qu’un "coup marketing". Cette publication a déclenché de nombreuses réactions chez les représentants de ce secteur. L'analyse proposée ici tâche de rendre compte, en confrontant les deux types de prises de parole, de l’impact que peut avoir l’objet d'une polémique (la littérature jeunesse, dans ce cas-ci) sur le déroulement de celle-ci. [less ▲]

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See detailDamping identification of lightly damped linear dynamic systems using Common-base Proper Orthogonal Decomposition
Andrianne, Thomas ULg; Dimitriadis, Grigorios ULg

in Mechanical Systems & Signal Processing (2012), 28

This paper presents a new technique to identify the damping of linear systems. It is developed from the Proper Orthogonal Decomposition (POD) of the free response of the system and extended to the ... [more ▼]

This paper presents a new technique to identify the damping of linear systems. It is developed from the Proper Orthogonal Decomposition (POD) of the free response of the system and extended to the recently proposed Common-base POD (CPOD). The present application of CPOD considers simultaneously several free responses of the system to different initial conditions. The eigen-decomposition of the co-variance matrix leads to a unique vector basis which is likely to contain more information about the dynamics of the system than a vector basis obtained by the classic POD technique. The ability of the technique to estimate the mode shapes and the modal damping is demonstrated on a simulated mass-spring-damper system. Two different distributions of masses are considered in order to confront the CPOD analysis to the intrinsic limitation of POD, i.e. that the mode shapes are identified exactly only if the mass matrix is proportional to the identity matrix. It is shown that the identification of the damping is still possible when the modes are not orthonormal. The robustness of the technique is demonstrated in the presence of noise in the responses of the system and through an experimental application with comparison with other identifications techniques. [less ▲]

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