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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)

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Peer Reviewed
See detailLe droit de la distribution
Petit, Nicolas ULg

Conference (2009, May 08)

Detailed reference viewed: 23 (1 ULg)
See detailBiodegradable polymers-based nanofibers by electrospinning
Jérôme, Christine ULg

Conference (2009, May 07)

Detailed reference viewed: 12 (1 ULg)
See detailBiogeochemical changes in the North Pacific in response to a shut down of the Atlantic meridional overturning
Menviel, L.; Timmermann, A.; Timm, O. et al

Conference (2009, May)

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See detailUne solution numérique au test de Cattell pour déterminer le nombre de composantes principales à retenir
Raîche, Gilles; Magis, David ULg; Walls, Ted et al

Conference (2009, May)

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See detailDiagnostic et traitement des troubles de la mobilité laryngée
FINCK, Camille ULg

Conference (2009, May)

Detailed reference viewed: 4 (0 ULg)
Peer Reviewed
See detailHow to deal with radical changes in downsizing strategies of global companies? Territorial renewal and adaptative institutionalization
Naedenoen, Frédéric ULg; Pichault, François ULg; Xhauflair, Virginie ULg

Conference (2009, May)

A large part of the empirical literature devoted to the question of territorial governance and downsizing still refers to a planning view on corporate strategies (Mintzberg, 1994). A particular ... [more ▼]

A large part of the empirical literature devoted to the question of territorial governance and downsizing still refers to a planning view on corporate strategies (Mintzberg, 1994). A particular restructuring strategy, once being designed and announced, should be implemented as such, in a sequential way. Most studies do not consider the probability, quite high in a context of global uncertainty, of radical reorientations of the downsizing strategy. This is exactly what occurred in the Liege area, where a big steel group decided successively - and according to how the way the economic climate goes - (1) to stop an important part of its activity, (2) to reopen it and lastly (3) to suspend it again. In those conditions - 3 radical changes in less than 5 years - one can easily understand that a linear view on territorial reconversion must be questioned. [less ▲]

Detailed reference viewed: 62 (12 ULg)
See detailA drop of spectroscopy
Terwagne, Denis ULg; Gilet, Tristan ULg; Vandewalle, Nicolas ULg et al

Conference (2009, May)

Detailed reference viewed: 8 (4 ULg)
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See detailLa compensation des pertes
Richelle, Isabelle ULg

Conference (2009, May)

Detailed reference viewed: 7 (1 ULg)
Peer Reviewed
See detailLes identités, filtre d'interprétation et d'action dans le cadre des réformes de l'administration publique ?
Rondeaux, Giseline ULg

Conference (2009, May)

Un changement planifié majeur tel qu’une réforme entraîne une transformation de multiples aspects de l’organisation : ses modes d’organisation, sa politique de GRH, ses stratégies, sa manière de concevoir ... [more ▼]

Un changement planifié majeur tel qu’une réforme entraîne une transformation de multiples aspects de l’organisation : ses modes d’organisation, sa politique de GRH, ses stratégies, sa manière de concevoir et de remplir ses missions, ses structures, ses valeurs, ses systèmes et réseaux, ses référents, etc. Cette transformation suppose la valorisation de modes de fonctionnement, de valeurs et de compétences différents, et a pour résultat un bouleversement de l’identité organisationnelle (plurielle et complexe) et des identités professionnelles des membres de cette organisation. Nous proposons, dans cette communication, de nous centrer sur la notion d’identité organisationnelle, définie comme la réponse à la question « qui sommes-nous en tant qu’organisation ? ». Ainsi, l’identité organisationnelle correspond à des moments dans l’histoire de l’organisation, des stades aisément identifiables (état stable, central et distinctif) (Albert et Whetten, 1985). L’analyse du contexte (discours et notes de politique générale, textes « fondateurs », plans et dispositifs de gestion) permet en effet de distinguer assez clairement les changements de ligne stratégique et, in fine, des orientations dans la définition de l’identité organisationnelle, au fil du temps. Dans cette perspective, une réforme peut être considérée comme un projet identitaire dans la mesure où elle propose une redéfinition de ce "qui sommes-nous ?". Telle est notamment la position de Du Gay (1996), selon lequel le New Public Management constitue un projet identitaire, en ce qu’il vise à redéfinir la main d’œuvre. Toutefois, l’identité organisationnelle ne peut être considérée comme une dimension monolithique. Chaque stade est en effet marqué par différentes interactions (différentes logiques identitaires dont certaines prédominent d’autres à certains moments). En effet, même si au sein d’une identité organisationnelle, une logique identitaire particulière semble prévaloir, d’autres logiques identitaires sont néanmoins présentes, ou apparaissent, sur un mode plus minoritaire. L’identité organisationnelle se conçoit donc comme hybride, composée d’une logique identitaire dominante et de logiques identitaires « secondaires ». Ainsi que le notent Meyer et Hammerschmit, « as different institutional logics entail different social identities with diverging positions, we can expect the process in which prevalent institutional logics are challenged or replaced to be contested and struggles over the legitimacy of a new orientation to take place » (2006: 1001). En d’autres termes, la logique identitaire dominante est celle qui est enactée (au sens de réalisée, mise en œuvre) et donc décelable dans l’identité organisationnelle. Les autres logiques identitaires sont présentes dans l’organisation, mais sur un mode minoritaire. Au moyen d’une démarche qualitative longitudinale menée durant deux ans dans un ministère fédéral belge, nous proposons une typologie des logiques et profils identitaires. La méthodologie mise en œuvre a consisté en deux séries d’interviews (10 interviews de contexte auprès d’acteurs clés de l’organisation, et 27 interviews d’identité, encadrés par un questionnaire semi-ouvert, auprès d’un échantillon diversifié), menés à 12-18 mois d’intervalle. A partir des données récoltées, nous avons procédé à une analyse de contenu et une analyse de terminologie. Nous distinguons trois grandes logiques identitaires, de manière archétypale, qui s’apparentent aux tendances pointées dans la littérature sous les termes « Service Public» pour l’une d’entre elles, soit les représentations, principes et valeurs traditionnellement associées à l’administration, et « Managérialisme Public» pour la deuxième logique, soit les principes, valeurs et représentations liés au courant du New Public Management. La troisième logique identitaire que nous avons décelée par ailleurs, est désignée sous le terme de « Pragmatisme ». Elle se constitue d’une combinaison des principes, valeurs et représentations des deux logiques précédentes, marquée par un degré de « dogmatisme » moins prononcé. En d’autres termes, les porteurs de cette troisième logique semblent s’attacher davantage aux réalisations tangibles et aux résultats, bref à l’action plutôt qu’à des principes et valeurs en tant que tels. Par ailleurs, la confrontation de la logique identitaire avec la perception du contexte peut conduire soit à une situation de congruence (par analogie avec les travaux de Rogers, 1951), dans laquelle la perception du contexte apparaît comme en continuité avec la logique identitaire, soit à une situation de dissonance (Festinger, 1965), faisant référence à une rupture entre les principes identitaires des individus, la logique identitaire qu’ils adoptent (comprise comme ensemble de croyances et de valeurs reliées entre elles et partagées par une communauté), et leur perception de la réalité (du contexte). Cette seconde partie de notre raisonnement nous mène à la notion de profil identitaire. Cette notion peut se définir comme la manière dont chacune des logiques identitaires interagit avec le contexte. Nous distinguons ainsi 7 profils identitaires : les invariants, les nostalgiques, les pragmatiques et pragmatiques dissonants, les professionnels, les désabusés et les démobilisés. Chacun de ces profils sera détaillé, en précisant notamment quelles sont leurs facteurs de dissonance et d’évolution. Ces différents éléments tendent à confirmer l’existence d’une hybridation du contexte (différentes logiques identitaires en présence, évolution des identités organisationnelles proposées à différents moments) et des acteurs (différentes perceptions du contexte, différents facteurs individuels de positionnement, différents profils identitaires). En conséquence, l’hypothèse qui charpente l’ensemble de notre réflexion est celle d’une co-structuration du contexte de l’administration publique dans le cadre de changements (réforme, mouvement de modernisation) et des identités : les réformes modifient en partie les identités, mais celles-ci façonnent également le cours des réformes. Cette co-structuration se traduit concrètement à différents niveaux d’appréhension, du plus global (spécificité du secteur public, ethos des fonctionnaires) au plus micro (niveau de l’individu), en passant par les niveaux intermédiaires que sont les niveaux organisationnel et professionnel. Notre approche longitudinale révèle par ailleurs les dynamiques identitaires, en identifiant notamment les processus de shift d’un profil à l’autre, et nous conduit à proposer un modèle des dynamiques identitaires contextualisé. L’identité constitue-t-elle un frein ou un levier pour le changement ? A l’instar de la culture d’entreprise, l’identité peut être appréhendée selon deux angles différents : d’une part, elle peut être considérée comme un facteur de cohésion (Hogg et Terry, 2000), de création de sens lors d’un changement (Salk et Shenkar, 2001) et, in fine, une source d’innovation et un avantage concurrentiel (Fiol, 1991, 2001). D’autre part, elle peut être assimilée à un facteur de stabilité organisationnelle (voire d’inertie) et de reproduction de l’existant. Dans cette deuxième perspective, l’identité organisationnelle serait alors un obstacle à la nécessaire évolution de toute organisation (Whetten et Godfrey, 1998). L’identité serait ainsi, en d’autres termes, facteur de résistance au changement (Reger et al., 1994), notamment si ce dernier est perçu comme cause d’éloignement des missions de base historiques de l’organisation (Kletz, 2002). Les résultats de notre analyse mettent en évidence l’ampleur des obstacles que les problématiques identitaires peuvent constituer face au changement. Ils font également apparaître des leviers potentiels de changement. Dans la mesure où ils auront pu être identifiés, ces éléments peuvent ultérieurement constituer une base pour le développement d’une approche, de méthodes voire d’outils relatifs à la gestion du changement : utiliser les identités organisationnelles comme indicateur clé voire comme levier de changement. [less ▲]

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See detailImplementation of an active school project in a rural environment in Wallonia. A collaborative study
Cloes, Marc ULg; Dequenne, Aurélie

Conference (2009, May)

Detailed reference viewed: 37 (4 ULg)
See detailThe ultraviolet nitric oxide emission in the nightside atmospheres of Venus and Mars
Cox, Cédric ULg; Gérard, Jean-Claude ULg; Bertaux, J. L.

Conference (2009, May)

Detailed reference viewed: 10 (0 ULg)
See detailENZYMATIC INTERESTERIFICATION OF PALM OIL AND FRACTIONS
Gibon, Véronique; Danthine, Sabine ULg; De Clercq, Nathalie et al

Conference (2009, May)

Detailed reference viewed: 13 (1 ULg)
See detailAirglow and aurora
Gérard, Jean-Claude ULg

Conference (2009, May)

Detailed reference viewed: 3 (0 ULg)
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See detailDynamic Hedge Fund Style Analysis with Errors-in-Variables
Bodson, Laurent ULg

Conference (2009, May)

This paper revisits the traditional return-based style analysis (RBSA) in presence of time-varying exposures and errors-in-variables (EIV). We first apply a selection algorithm using the Kalman filter to ... [more ▼]

This paper revisits the traditional return-based style analysis (RBSA) in presence of time-varying exposures and errors-in-variables (EIV). We first apply a selection algorithm using the Kalman filter to identify the more appropriate benchmarks for the analyzed fund return. Then, we compute their corresponding higher moment estimated errors-in-variables, i.e. the measurement error series introducing the (cross) moments of order three and four. We adjust the selected benchmarks by subtracting their higher moments estimated EIV from the initial return series, to obtain an estimate of the true uncontaminated benchmarks. We finally run the Kalman filter on these adjusted regressors. Analyzing EDHEC alternative indexes styles, we show that this technique improves the factor loadings and permits to identify more precisely the return sources of the considered hedge fund strategy. [less ▲]

Detailed reference viewed: 81 (24 ULg)
See detailComparison of O2 IR and NO UV night airglow variations on Mars and Venus
Brecht; Bougher, S. W.; Gérard, Jean-Claude ULg et al

Conference (2009, May)

Detailed reference viewed: 8 (0 ULg)
See detailDecoherence-enhanced measurements
Braun, Daniel; Martin, John ULg

Conference (2009, May)

Detailed reference viewed: 13 (0 ULg)
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See detailMeasuring positive and negative aspects of well-being at work: Intern and extern validity of the PNOSI.
Barbier, Marie ULg; Hansez, Isabelle ULg

Conference (2009, May)

With the emergence of positive psychology, research interest in workers positive responses to work conditions has gained ground fast. In the beginning of the 21st century, our unit developed the PNOSI, a ... [more ▼]

With the emergence of positive psychology, research interest in workers positive responses to work conditions has gained ground fast. In the beginning of the 21st century, our unit developed the PNOSI, a new tool for measuring Positive and Negative Occupational Stress. Negative occupational stress was defined as the response of workers facing demands they feel they have to manage but for which they doubt necessary resources are available. Positive occupational stress was defined as the response of workers facing demands they feel they have to manage and for which they perceive necessary resources are available. Exploratory analyses (Barbier & Hansez, 2008) have identified a two-factor structure, one measuring Positive Occupational Stress (POSI) and the other measuring Negative Occupational Stress (NOSI). The following research has two goals: establishing PNOSI intern structure through a cross-validation strategy using calibration and validation samples (goal 1), and testing its convergent and discriminant validity (goal 2). As regards to goal 1, structural equation modelling using Lisrel 8.80 was performed on 2,713 data collected in a Belgian electricity company. Results show that the two-factor solution suits data best than an alternative one “wellbeing” factor solution. Moreover, eliminating two items leads to better fit. We then fitted this reduced two-factor structure on more than 15,000 data collected in six companies. Results show that the reduced two-factor solution should be preferred to the alternative one in all six samples. PNOSI intern structure is thus replicated. As regards to goal 2, we calculated correlations between NOSI and POSI scales, and constructs of burnout, engagement, workaholism and commitment. Data were collected in a Belgian public institution (N = 954). NOSI was moderately correlated to our burnout measure, and can thus be considered as a different, even if related, construct. POSI was highly correlated to our measure of engagement, challenging our hypothesis that the two are different constructs. Finally, NOSI was moderately and negatively correlated to commitment and positively correlated to workaholism, whereas the reverse was true for POSI. It seems thus that NOSI is distinct from burnout, workaholism and commitment, whereas POSI is distinct from workaholism and commitment. To conclude, we can say that PNOSI two-factor structure is established. NOSI shows convergent validity with the similar construct of burnout, but is distinct from it. Results are less clear concerning POSI and engagement. Finally, NOSI and POSI are differently related to constructs of commitment and workaholism; their discriminant validity is thus established. [less ▲]

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See detailA test of the Job Demands-Resources model with alternative measures of strain and well-being
Barbier, Marie ULg; Hansez, Isabelle ULg

Conference (2009, May)

Since the beginning of the 21st century, the Job Demands-Resources model (Demerouti, Bakker, Nachreiner & Schaufeli, 2001) has given rise to numerous studies aimed at a better understanding of positive ... [more ▼]

Since the beginning of the 21st century, the Job Demands-Resources model (Demerouti, Bakker, Nachreiner & Schaufeli, 2001) 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 strain has been demonstrated several times, as well as cross-links between the two. However, these studies mainly rely on two measurement tools: the MBI-GS as a measure of strain and the UWES as a measure of engagement. The aim of our study is to test the model using alternative measures. Strain was measured using the NOSI subscale, and engagement using the POSI subscale of the PNOSI, a new tool measuring positive and negative wellbeing. Structural and external validity of this tool have been demonstrated previously (Barbier, Peters & Hansez, submitted). According to the JDR model, we hypothesise that high job demands would lead to strain and then to health problems. Our second hypothesis is that job resources would lead to engagement and then to low intent to leave. Structural equation modelling was performed using Lisrel 8.80 on 954 data collected in a Belgian public institution. As regards to measurement model, results show that a six-factor model (demands, resources, strain, engagement, health problems and intent to quit or IQ) shows good fit to data. We first tested the traditional JDR model, but it showed bad fit. Fit was improved when adding a path from resources to strain, from strain to IQ and from engagement to health problems. This alternative model showed better fit than the initial one. This study makes three main contributions. First, it tests the well-established JDR model using alternative measures of positive and negative sides of well-being. Second, it asks questions as to the respective outcomes of strain and engagement. More specifically, the path between engagement and IQ became not significant when a path from strain to IQ was added. That is, IQ seems to be more a product of strain than of (lack of) engagement. Finally, it emphasizes the important role of resources. It may be that the link between resources and low IQ would be mediated by low level of strain rather than by high level of engagement. Similarly, the relation between engagement and health problem is positive, which raises questions as to the pre-supposed positive effects of engagement. [less ▲]

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See detailMilitary cultures and education: harmonizing or standardizing Europe?
Paile, Sylvain ULg

Conference (2009, May)

Detailed reference viewed: 18 (0 ULg)
See detailSense, Nonsense and Context
Gauvry, Charlotte ULg

Conference (2009, May)

Detailed reference viewed: 6 (0 ULg)
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See detailThe ontogenetic dynamic of skull shape disparity in damselfishes (Pomacentridae)
Frederich, Bruno ULg; Vandewalle, Pierre ULg

Conference (2009, May)

Damselfishes (Pomacentridae) are among the most speciose of coral-reef fishes, with > 350 species world-wide, most of which live on coral reefs. They have a life history with two distinct phases: a ... [more ▼]

Damselfishes (Pomacentridae) are among the most speciose of coral-reef fishes, with > 350 species world-wide, most of which live on coral reefs. They have a life history with two distinct phases: a dispersive pelagic larval phase and a sedentary benthic adult phase. The larval stage ends at coral reef settlement. All larvae feed on planktonic preys whereas juveniles and adults associated to the coral reef show a higher diversity of diets: zooplanktivorous, herbivorous, coral polyp feeders and omnivorous species. Morphological disparity is a major theme in paleobiology. Most studies of disparity have focused on its temporal dynamics over a geological time scale. Surprisingly, the relationship between ontogeny and disparity has received little attention. Using landmark-based geometric morphometrics, this study aims to test the hypothesis that the ontogenetic change in diet is related to an increase of shape disparity in head skeletal units (neurocranium, suspensorium + opercle, mandible and premaxilla) during the post-settlement growth in eight species of damselfishes. At the end of the larval stage (coral reef settlement), all skeletal units are already species-specific. By comparing levels of shape disparity between species at three developmental stages (at settlement, at 60 mm SL and at maximum adult body size), we found that disparity increases significantly during ontogeny. The ontogenies of shape were also compared to identify evolutionary changes in developmental processes modifying shape disparity. The ontogenetic patterns are highly divergent among species. At least, evolutionary changes affected three parameters of ontogenetic trajectories of shape in this group: (1) the allometric patterns (the direction in which the vector representing the ontogeny of shape point), (2) the amount of change undergone during the post-settlement phase and (3) the rate of shape changes. From a functional point of view, the ontogenetic transformations enhance suction-feeding and/or algae scraping (e.g. heightening of the suspensorium and opercle, shortening of the mandible). [less ▲]

Detailed reference viewed: 33 (2 ULg)
See detailIntentionality and Meaning in Heidegger and Wittgenstein
Gauvry, Charlotte ULg

Conference (2009, May)

Detailed reference viewed: 7 (0 ULg)
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See detailComparaison empirique des méthodes classiques de détection du fonctionnement différentiel d’items en psychométrie
Magis, David ULg; De Boeck, Paul; Raîche, Gilles

Conference (2009, May)

Detailed reference viewed: 12 (3 ULg)
See detailSciences Institutions Responding to Reflexive Modernization
Delvenne, Pierre ULg

Conference (2009, April 30)

Detailed reference viewed: 2 (0 ULg)
See detailLes sutures en dentisterie : cours théorique et travaux pratiques
LAMBERT, France ULg

Conference (2009, April 30)

Detailed reference viewed: 12 (3 ULg)
See detailApproche pratique face à l'hypertension non contrôlée
Krzesinski, Jean-Marie ULg

Conference (2009, April 28)

Detailed reference viewed: 7 (2 ULg)
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See detailImmunoCAP© ISAC: interest in allergy diagnosis
Gadisseur, Romy ULg; Chapelle, Jean-Paul ULg; Cavalier, Etienne ULg

Conference (2009, April 28)

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See detailAnalyse des incidents médicamenteux au CHU de Liège
Bottari, Ludovic; Maesen, Didier ULg; Van Hees, Thierry ULg

Conference (2009, April 28)

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See detailA new mechanism of upwelling generated filaments based on potential vorticity balance
Troupin, Charles ULg; Mason, Evan; Beckers, Jean-Marie ULg et al

Conference (2009, April 27)

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See detailLa construction d'une identité jésuite : le corps et la mémoire
Delfosse, Annick ULg

Conference (2009, April 24)

Detailed reference viewed: 18 (4 ULg)
Peer Reviewed
See detailDiscours critiques face au modèle dominant dans les sciences de la gestion
Robert, Jocelyne ULg

Conference (2009, April 23)

Detailed reference viewed: 29 (15 ULg)
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See detailThe 1958-2008 Greenland ice sheet surface melt and the mid-tropospheric atmospheric circulation
Fettweis, Xavier ULg

Conference (2009, April 23)

With the aim to study the impact of the mid-tropospheric circulation on the Greenland ice sheet (GrIS) surface melt simulated by the regional climate model MAR, we developed an automatic Circulation Type ... [more ▼]

With the aim to study the impact of the mid-tropospheric circulation on the Greenland ice sheet (GrIS) surface melt simulated by the regional climate model MAR, we developed an automatic Circulation Type Classification (CTC) based on the 500hPa geopotential height from reanalyses over the period 1958-2008. This CTC shows that the dominant mode of the regional atmospheric summer variability around the GrIS is linked to the North Atlantic Oscillation (NAO) and that the surface melt anomalies are highly correlated to the general circulation. It explains notably why a record surface melt was observed during the summers 2007 and 2008. In addition, the climate conditions occurring the 27th August of 2003, where the GrIS temperature was 10°C higher than the normal, were the consequence of an almost unique 500 hPa circulation in the 50 last years. [less ▲]

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See detailPrion: Biosafety Level 3-unconventional transmissible agent
Zorzi, Willy ULg; Elmoualij, Benaïssa ULg

Conference (2009, April 22)

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See detailGround water flow simulation in mining works: Application of the Hybrid Finite Element Mixing Cell method
Wildemeersch, Samuel ULg; Orban, Philippe ULg; Brouyère, Serge ULg et al

Conference (2009, April 22)

Hydrogeological models can greatly help simulating groundwater flow in the particular context of mining works. However, classical modeling techniques are not so suited in this context because the medium ... [more ▼]

Hydrogeological models can greatly help simulating groundwater flow in the particular context of mining works. However, classical modeling techniques are not so suited in this context because the medium is strongly disturbed by shafts and networks of galleries. Consequently, specific modeling techniques have been developed. Box model techniques require only few parameters but they calculate only mean water levels in exploited zones and do not consider interactions between exploited and unexploited zones. Conversely, physically-based and spatially-distributed techniques represent explicitly both exploited and unexploited zones and take into account interactions between them but they require a lot of parameters sometimes difficult to estimate. The Hybrid Finite Element Mixing Cell (HFEMC) method is a new modeling technique constituting a compromise between simple and complex techniques used in mining context. The principle of this method is to fully couple a representation of exploited zones by a group of mixing cells possibly interconnected by pipes and a representation of unexploited zones by classical finite elements. Interactions between mixing cells and finite elements of the mesh are taken into account through 3rd type (Fourier) internal boundary conditions. With this method, exploited zones are characterized by mean water levels while spatially-distributed hydraulic heads are calculated for the entire adjacent and overlaying unexploited zones. Additionally, thanks to the coupling between mixing cells and finite elements, water exchanges between exploited and unexploited zones are explicitly taken into account. The HFEMC method allows also simulating groundwater rebound following mine closure and associated phenomena such as water inrushes. Concepts and equations of the HFEMC method are presented and illustrated using test cases. First results of an application on an abandoned coalfield in the region of Liege (Belgium) are also proposed. [less ▲]

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See detailThe location and topology of electron beams in Io‘s wake
Jacobsen, Sven; Saur, Joachim; Neubauer, Friz et al

Conference (2009, April 22)

The Galileo spacecraft measured hot field aligned electron beams near Io during three flybys. We apply our 3D MHD model of the Io-Jupiter interaction to constrain the location and shape of field aligned ... [more ▼]

The Galileo spacecraft measured hot field aligned electron beams near Io during three flybys. We apply our 3D MHD model of the Io-Jupiter interaction to constrain the location and shape of field aligned electron beams for the individual flyby scenarios. Io continuously generates MHD waves by disturbing the Jovian magnetoplasma. Currents carried by Alfvén waves propagate predominantly along the magnetic field lines. The waves accelerate electrons as the number of charge carriers decreases on their way to Jupiter. These energetic electrons precipitate into the Jovian ionosphere, visible as prominent Io footprint emission in the Jovian aurora. On the other hand electrons have to be accelerated upward to form the beams measured by Galileo. Unlike the beam formation, the position and spatial structure of these beams has been poorly discussed. We adopt our 3D MHD model initial conditions to the individual flyby scenario and determine the spatial morphol- ogy of beams in Io’s orbital plane. We compare our findings to Galileo observations and find very good agreement. Moreover, we use our model to further investigate in detail a recent concept which involves cross-hemisphere electron beams to explain certain auroral features of the Io footprint emission such as a leading spot and secondary spots [Bonfond et al., 2008]. Our results indicate that besides geometrical properties, such as Io’s position in the torus, the incoming plasma density controls the travel path and topology of an electron beam. [less ▲]

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See detailHigh-resolution Climatology of the North-East Atlantic using Data-Interpolating Variational Analysis
Troupin, Charles ULg; Machín, Francisco; Ouberdous, Mohamed ULg et al

Conference (2009, April 21)

Detailed reference viewed: 19 (3 ULg)
See detailMiddle Miocene climate and vegetation modelling with PLASIM and CARAIB
Henrot, Alexandra ULg; François, Louis ULg; Favre, Eric ULg et al

Conference (2009, April 21)

In a long-term climatic cooling trend, the Middle Miocene represents one of the last warm periods of the Neogene, culminating with the Miocene Climatic Optimum, MCO (17-15 My). Palynological studies ... [more ▼]

In a long-term climatic cooling trend, the Middle Miocene represents one of the last warm periods of the Neogene, culminating with the Miocene Climatic Optimum, MCO (17-15 My). Palynological studies suggest that the warmer climatic conditions prevailing during the MCO allowed warm forests to expand poleward of the subtropical zone, with evergreen forests proliferating in North America and Europe (Jimenez-Moreno and Suc, 2007, Palaeogeogr. Palaeoclimatol. Palaeoecol. 253: 208-225). In this work, we used the Planet Simulator (Fraedrich et al., 2005, Meteorol. Z. 14: 299-304 and 305-314), an Earth system model of intermediate complexity, to carry out several simulation experiments, where we have assessed the effects of the absence of ice on the continents, the opening of the Central American and Eastern Tethys seaways, the lowering of the topography on land and the effect of various atmospheric CO2 concentrations, in agreement with the values reported in the litterature. We then produced several vegetation distributions, using the dynamic vegetation model CARAIB (Galy et al., 2008, Quat. Sci. Rev. 27: 1396-1409), to analyse if the climatic forcings considered are sufficient to explain the expansion of warmer forest types to higher latitudes. Our results indicate that an increase of atmospheric CO2 concentration, higher than the present-day one, is necessary to allow subtropical forest types to expand poleward. This result agrees with recent paleo-atmospheric CO2 reconstruction from stomatal frequency analysis, which suggests 500 ppmv of CO2 during the MCO. However, the required warming may be due to processes not considered in our setup (e.g. full oceanic circulation or other greenhouse gases). [less ▲]

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See detailEvolution of Western Mediterranean Sea Surface Temperature between 1985 and 2005
Troupin, Charles ULg; Lenartz, Fabian; Sirjacobs, Damien ULg et al

Conference (2009, April 20)

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See detailFaux jumeaux et bisexualité dans les arts premiers et préhistoriques
Mélon, Jean; Jacob, Laurent; Stassart, Martine ULg

Conference (2009, April 19)

The author compares paleo- and neolithical artistic productions ( objects and pictures of the paleolithical art - 30 to 10.000 years bef. JC - and the neolithical -5 t 2.000 bef. JC) with modern or tribal ... [more ▼]

The author compares paleo- and neolithical artistic productions ( objects and pictures of the paleolithical art - 30 to 10.000 years bef. JC - and the neolithical -5 t 2.000 bef. JC) with modern or tribal sculptures. It appears that the most pregnant theme of these socalled primitive arts is symbolical bisexuality. [less ▲]

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See detailImages, spectacles et médias: quelle place? quelles responsabilités?
Fincoeur, Bertrand ULg

Conference (2009, April 16)

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See detailTennis et paris sportifs truqués
Fincoeur, Bertrand ULg

Conference (2009, April 16)

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See detailL’aide juridique belge : entre expertise juridique et défense de causes politiques
Lejeune, Aude ULg

Conference (2009, April 14)

Dans nos sociétés où le recours au droit devient de plus en plus fréquent, de nombreuses initiatives sont mises en place tant par des professionnels du droit, des associations que par les pouvoirs publics ... [more ▼]

Dans nos sociétés où le recours au droit devient de plus en plus fréquent, de nombreuses initiatives sont mises en place tant par des professionnels du droit, des associations que par les pouvoirs publics afin de favoriser l’accès au droit et à la Justice pour l’ensemble des citoyens. Cette communication analyse l’apparition et la constitution d’un mouvement de contestation du système d’aide juridique belge et les stratégies utilisées par ce mouvement pour faire valoir son point de vue auprès des autorités publiques et des professionnels du droit concernés. Depuis les années 1960, l’aide juridique belge est marquée par deux orientations : une approche légaliste portée par les avocats dans le cadre de consultations organisées par les Ordres, permettant à tout citoyen d’avoir accès à l’expertise juridique d’un professionnel, et une approche militante dans le cadre de consultations dans des associations, des syndicats ou des "boutiques de droit", orientées vers une action de type politique. Suite au lobbying exercé par les avocats, la loi de 1998 relative à l’aide juridique soutient très majoritairement l’aide juridique qui s’inscrit dans la première conception de l’accès au droit. Face à cela, un mouvement de contestation, constitué d’avocats militants, d’associations spécialisées dans l’information juridique et d’hommes politiques, revendique un accès au droit qui ne se limite pas à une consultation « neutre » d’un expert du droit, mais à pratiquer une montée en généralités et à construire, à partir des situations singulières, des causes politiques . [less ▲]

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See detailPEGASE : UN MODÈLE INTÉGRÉ BASSIN HYDROGRAPHIQUE / RIVIÈRES POUR LA DIRECTIVE CADRE EUROPÉENNE
Deliège, Jean-François ULg; Everbecq, Etienne ULg; Grard, Aline ULg et al

Conference (2009, April 09)

Presentation of the PEGASE model (Planification Et Gestion de l’ASsainissement des Eaux), developed by the Aquapole Aquapole. New operational way to assess the evolution of the river quality in terms of ... [more ▼]

Presentation of the PEGASE model (Planification Et Gestion de l’ASsainissement des Eaux), developed by the Aquapole Aquapole. New operational way to assess the evolution of the river quality in terms of presures on them, as well as a tool to help competent authorities to optimise the cost/efficiency ratio of the measures foreseen to reduce the impact of these pressures. [less ▲]

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See detailCognitive and affective mechanisms involved in hallucination-proneness
Laroi, Frank ULg

Conference (2009, April 09)

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See detailDetecting weeds by artificial vision in carrots: towards optimization of herbicide use
Piron, Alexis ULg; Destain, Marie-France ULg

Conference (2009, April 03)

A method of determining the position of weeds growing in soil amongst horticultural crops is described.

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See detailLes plages d'Agnès. Une pendule sans aiguille
Havelange, Carl ULg

Conference (2009, April 03)

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See detailDesign of smart polymer micelles for pH triggered drug delivery systems
Jérôme, Christine ULg

Conference (2009, April 02)

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See detailPlant species extinction debt in a biodiversity hotspot: community and species approaches
Piqueray, Julien ULg; Bisteau, Emmanuelle; Cristofoli, Sara et al

Conference (2009, April)

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See detailMalignant catarrhal fever induced by alcelaphine herpesvirus 1 is associated with proliferation of CD8+ T cells supporting a latent infection
Dewals, Benjamin G ULg; Boudry, Christel; Farnir, Frédéric ULg et al

Conference (2009, April)

Alcelaphine herpesvirus 1 (AlHV 1), carried by wildebeest asymptomatically, causes malignant catarrhal fever (WD MCF) when cross species transmitted to a variety of susceptible species of the Artiodactyla ... [more ▼]

Alcelaphine herpesvirus 1 (AlHV 1), carried by wildebeest asymptomatically, causes malignant catarrhal fever (WD MCF) when cross species transmitted to a variety of susceptible species of the Artiodactyla order. Experimentally, WD-MCF can be induced in rabbits. The lesions observed are very similar to those described in natural host species. Here, we used the rabbit model and in vivo 5-Bromo-2’-Deoxyuridine (BrdU) incorporation to study WD-MCF pathogenesis. The results obtained can be summarized as follows. (i) AlHV-1 infection induces CD8+ T cell proliferation detectable as early as 15 days post-inoculation. (ii) While the viral load in peripheral blood mononuclear cells remains below the detection level during most of the incubation period, it increases drastically few days before death. At that time, at least 10% of CD8+ cells carry the viral genome; while CD11b+, IgM+ and CD4+ cells do not. (iii) RT-PCR analyses of mononuclear cells isolated from the spleen and the popliteal lymph node of infected rabbits revealed no expression of ORF25 and ORF9, low or no expression of ORF50, and high or no expression of ORF73. Based on these data, we propose a new model for the pathogenesis of WD-MCF. This model relies on proliferation of infected CD8+ cells supporting a predominantly latent infection. [less ▲]

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See detailNewborn Screening for Sickle Cell Disease using Tandem Mass Spectrometry
BOEMER, François ULg

Conference (2009, April)

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See detailCapturing effects of brand image confusion on the brand image using associative networks: An experimental investigation
Brandt, Céline ULg; Pahud de Mortanges, Charles ULg; Bluemelhuber, Christian et al

Conference (2009, April)

Purpose – Contrarily to brand confusion, which refers to situations when consumers buy an imitator brand thinking that it is the original brand, Brand Image Confusion (BIC) only implies confusion at the ... [more ▼]

Purpose – Contrarily to brand confusion, which refers to situations when consumers buy an imitator brand thinking that it is the original brand, Brand Image Confusion (BIC) only implies confusion at the brand image level. BIC occurs when consumers have difficulty distinguishing brands with closely resembling brand associations (logo, symbol, package design or other attributes). In this study, we address the lack of an appropriate method to capture the weakening of brand associations and the creation of unwanted associations as a result of BIC. Design/methodology/approach – We first introduce brand concept mapping (BCM), a powerful approach to measuring the brand image, and argue why this method is more appropriate than other methods. Subsequently, we investigate in an experiment how consumer exposure to a new brand with a closely resembling brand name affects their perceptions of the original brand image. Findings - Results suggest that, except when the new brand has exactly the same category and attributes as the original brand, a risk of BIC exists. This risk appears to be moderated by the consumer's previous experience with the brand. Originality/value - This article offers advice to academics and managers with respect to better capturing the consequences of BIC. It shows how the introduction of a brand with a closely resembling brand name, even if the introduction takes place in another category, may harm the original brand. Finally, as a result, it implicitly raises the question of the broadening of the legal trademark dilution concept. [less ▲]

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See detailActualités 2008 en impôt des sociétés
Richelle, Isabelle ULg

Conference (2009, April)

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See detailBipartite life cycle of coral reef fishes promotes increasing shape disparity of the head skeleton during ontogeny.
Frederich, Bruno ULg; Vandewalle, Pierre ULg

Conference (2009, April)

Disparity is a major theme in the paleobiological literature. Most studies of disparity have focused on its temporal dynamics over a geological time scale and generally show that phenotypic disparity ... [more ▼]

Disparity is a major theme in the paleobiological literature. Most studies of disparity have focused on its temporal dynamics over a geological time scale and generally show that phenotypic disparity decreases or remains stable in numerous groups. Surprisingly, the relationship between ontogeny and disparity has received little attention. The ontogenetic dynamics of shape disparity are influenced by diverse interactions such as developmental constraints and/or environmental factors. Coral reefs have an extraordinary diversity of fishes. As the majority of demersal coral reef fishes, the damselfishes (Pomacentridae) have a bipartite life cycle. During the pelagic dispersion phase, all larvae feed on planktonic preys. On the other hand, juveniles and adults associated to the coral reef environment show a high diversity of diets. We test the hypothesis that this ontogenetic change in habitat and diet is related to an increase of shape disparity in head skeletal units (neurocranium, suspensorium, opercle, mandible and premaxilla). We also compare ontogenies of shape among eight species of damselfishes to identify the evolutionary changes in developmental processes modifying shape disparity. By comparing levels of disparity between the eight species at three developmental stages, at the end of the larval phase (reef settlement), at 60 mm SL, and at maximum adult body size, we found that disparity increases significantly during ontogeny. At the end of the larval stage, all skeletal units are already species-specific. The ontogenies of shape are highly divergent among species. At least, evolutionary changes affected three parameters of ontogenetic trajectories of shape in this group: (1) the allometric pattern (the direction in which the vector representing the ontogeny of shape point), (2) the amount of change undergone during the juvenile and adult phases and (3) the rate of shape changes. The interactions among environmental constraints and the three developmental parameters are responsible for increasing disparity. [less ▲]

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See detailExit Taxes
Richelle, Isabelle ULg

Conference (2009, April)

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See detailHydroxyl nightglow on Venus observed by VIRTIS on Venus-Express
Migliorini, A.; Piccioni, G.; Gérard, Jean-Claude ULg et al

Conference (2009, April)

Hydroxyl has been recently observed for the first time in the Venus atmosphere with the VIRTIS spectrometer on board the Venus-Express spacecraft. The (1-0) around 2.81 microns and the (2-0) around 1.46 ... [more ▼]

Hydroxyl has been recently observed for the first time in the Venus atmosphere with the VIRTIS spectrometer on board the Venus-Express spacecraft. The (1-0) around 2.81 microns and the (2-0) around 1.46 microns transitions have been detected. The intensity of the two emissions are respectively about 55 and 480 times less intense than the (0-0) oxygen transition (Piccioni et al, A&A, 2008). The possible chemical reactions which can produce hydroxyl on Venus involve O3 and HO2, with the former being the most probable, and hence OH can be used to indirectly infer the ozone distribution on Venus. VIRTIS data in limb mode observation were analyzed to derive the mean distribution of hydroxyl in the night side of Venus and the results are presented here. The typical peak altitude of the two emissions is set at 95-96 km in limb view, a few km lower than the oxygen emission at 1.27 um due to the transition (0-0). The peak altitude of the latter typically occurs at 97-98 km height. The OH full width at half maximum is in average about 7 km, and sometimes higher. The mean map of (1-0) hydroxyl distribution around 2.81 microns shows a maximum of emission of about 130 kR at about 1h local time. The study of the (2-0) hydroxyl distribution at around 1.46 microns results more difficult due to its weak intensity. [less ▲]

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See detailLes services d'intérêt économique général en Europe : Le cas de la gestion de l'eau en Belgique
Gathon, Henry-Jean ULg; Collignon, Aubry ULg

Conference (2009, April)

Le secteur de l'eau en Belgique, production, distribution, traitement des eaux usées.

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See detailLocal equating methods in the NEAT design
Janssen, Rianne; Magis, David ULg; San Martin, Ernesto et al

Conference (2009, April)

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See detailSocial insurance and redistribution
Pestieau, Pierre ULg

Conference (2009, March 31)

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See detailL'edizione elettronica del carteggio di francesco Guicciardini
Miesse, Hélène ULg

Conference (2009, March 31)

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See detailIntroduction
Saint-Amand, Denis ULg; Vrydaghs, David

Conference (2009, March 30)

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See detailAre bio and nano likely to be compared? If so, what are the consequences on public participation?
Thoreau, François ULg

Conference (2009, March 29)

Like modern biotechnologies, nanotechnologies are a generic area of research linked with several interconnected disciplinary fields. They may be converted into a large panel of applications. It also ... [more ▼]

Like modern biotechnologies, nanotechnologies are a generic area of research linked with several interconnected disciplinary fields. They may be converted into a large panel of applications. It also brings, with its development, promises of a quite huge potential including important economic opportunities. Both of those emergent technologies also raise important social, ethical or environmental issues. Nevertheless, many substantive differences remain between biotechnologies and nanotechnologies. The former was introduced in society by a time public actors were less sensitive to public participation, as shows the history of parliamentary Technology Assessment. A lack of public participation is often told to have grounded some public opposition to some particular biotechnologies, with the usually quoted case of GMOs. The latter are currently under development in quite other circumstances, as social shaping of technology begins to be widely acknowledged and role played by STS community grows faster. Nanotechnologies deal with more uncertainties and more complexity. So it is commonly accepted that, within their development process, they should include more public participation to avoid some pitfalls of biotechnologies. Still, other differences that context exist between biotechnologies and nanotechnologies. It may be stressed that biotechnologies have left laboratories for a private financial designing of marketable products and that nanotechnologies are just starting to leave laboratories under great public impulsions, with wide public support and funding, as in the case of the National Nanotechnology Initiative in the US. So in the presentation we consider whether, given those differences, biotechnologies and nanotechnologies are likely to be compared. Then we pick a look to potential consequences related to public participation. Should there be more public participation? What for? Should it be driven in a different way? [less ▲]

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See detailNon-pharmacological strategy to decrease risk of fall in the elderly
Bruyère, Olivier ULg

Conference (2009, March 28)

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See detailInter and intra genetic biodiversity in South East asian rodents: new insights for their conservation
Pagès, Marie ULg; Latinne, Alice ULg; Rivière, Taiana et al

Conference (2009, March 28)

Detailed reference viewed: 6 (1 ULg)
See detailBark recovery of 12 medicinal tree species from Benin after bark harvesting
Delvaux, Claire; Darchambeau, François ULg; Sinsin, Brice et al

Conference (2009, March 27)

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See detailVitamin D : epidemiologic aspect of the deficiency
Bruyère, Olivier ULg

Conference (2009, March 27)

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See detail« Comment une équipe de recherche peut-elle vous aider ? ». Témoignage des conditions de réussite dans une collaboration université – établissement scolaire
Radermaecker, Geoffray ULg; Gilles, Jean-Luc ULg; Leemans, Mélanie et al

Conference (2009, March 26)

Témoignage des conditions de réussite dans une collaboration université – établissement scolaire

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See detailMabo and After: Trauma Envy in White Australia
Delrez, Marc ULg

Conference (2009, March 26)

Detailed reference viewed: 35 (9 ULg)