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See detailComputer-aided integrated design for mechatronic systems with configuration-dependent dynamics
da Silva, Maira M; Bruls, Olivier ULg; Desmet, Wim et al

Conference (2008, May)

Mechatronics deals with the integrated design of a mechanical system and its control system. Moreover, a large number of mechatronic systems may have their natural frequencies and mode shapes dependent on ... [more ▼]

Mechatronics deals with the integrated design of a mechanical system and its control system. Moreover, a large number of mechatronic systems may have their natural frequencies and mode shapes dependent on their spatial configuration, which inevitably affects the performance and the stability of the control system. In particular, mechatronic systems, such as machine tools and pick-and-place robots, can be classified as systems with configuration-dependent dynamics, since the relative motion between their flexible components can lead to time-varying boundary conditions. A parametric model able to capture this behavior is proposed using finite element based flexible multibody method. A global modal parameterization is applied for model-order reduction. A linear parameter varying model is derived from these reduced models and can be used in a control design scheme. This methodology is applied to a pick-and-place assembly robot with a gripper carried by a flexible beam (Fig. 1a). Vibrations, which depend on the beam length, decrease the throughput of the machine (Fig. 1b). Linear time invariant and linear parameter varying control strategies are evaluated using the derived linear parameter varying model. [less ▲]

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See detailHow to involve stakeholders in CSR certifications?
El Abboubi, Manal ULg; Cornet, Annie ULg

Conference (2008, May)

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See detailOptimisation couplée topologie/dimensionnement de réseaux de canalisations
Andre, Jean; Brac, Jean; de Wolf, Daniel ULg et al

Conference (2008, May)

Detailed reference viewed: 84 (5 ULg)
See detailGenre et entrepreneuriat
Cornet, Annie ULg

Conference (2008, May)

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See detailL’utilisation des simulations informatisées pour la recherche en éducation
Raîche, Gilles; Sodoké, Komi; Blais, Jean-Guy et al

Conference (2008, May)

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See detailInter-organizational innovation projects developed within the framework of a public policy - Discussion and observations about the nature of innovations, cooperation practices and their interrelationships
Antoine, Mélanie ULg

Conference (2008, May)

In recent years, the promotion of R&D partnerships between universities, research labs and companies has become a key feature of innovation and development public policies. However, these collaborations ... [more ▼]

In recent years, the promotion of R&D partnerships between universities, research labs and companies has become a key feature of innovation and development public policies. However, these collaborations turn out to be fragile and their management very complex. In our literature review, the congruence between the nature of innovations (i.e. their radicalness) and the cooperation practices appears as a potentially powerful explanatory factor of interfirm innovation project’s outcome. Following this hypothesis, we explore, on two case studies of projects subsidized by the Walloon Competitive Clusters program, the way actors innovate and organize their actions. Though they face similar constraints, these projects illustrate diverse configurations, not only as to the nature of innovations but also as to cooperation practices. Besides, the analysis reveals that the criteria used to characterize the nature of innovations do not necessarily form a homogeneous set of factors. Considering these observations, we try to identify the main challenges faced by both projects’ partners. [less ▲]

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See detailManaging change in public administration: an identity approach
Rondeaux, Giseline ULg

Conference (2008, May)

Within the issue of the modernization of public administration, our initial focus is to question the existence of links between a reform within an administration and its organizational identities. Such ... [more ▼]

Within the issue of the modernization of public administration, our initial focus is to question the existence of links between a reform within an administration and its organizational identities. Such changes doubtless entail a transform of many aspects of public administration, such as organisational methods, HRM policy, the approach to planning and fulfilling its tasks, structures, terms of reference etc. This transformation involves the upgrading of operational methods and different skills and values, and results in the disruption of the organisational identity and the professional identities of members of the organisation (Fu et al., 1999; Abrams & Hogg, 1987). From empirical data collected within a Belgian Ministry, we assume that the introduction of a New Public Management reform leads to a hybridization of identity logics within public administration, but in other respects, the reform process can eventually be influenced by the identity logics. Using a longitudinal qualitative analysis, we distinguish 7 identity profiles, characterised by their reference to an identity logic (public service, public managerialism or pragmatism) and their perception of the context (congruence or dissonance). Through our case study, our hypothesis of organizational identities and reform process co-structuring appears to be valid, as shown by the hybridization of identity logics within the Ministry. Our results allow us to assume a modification of identity points of reference following a reform, as well as a reinterpretation of this reform through the identity filter. Our longitudinal approach reveals the identity dynamics, by identifying notably the shift processes from one position to another, and leads us to propose a model of contextualized identity dynamics. We are also able to show which factors produce (or are likely to produce) identity shifts, and the frame of mind of each identity profile towards change (1) as it is experienced and (2) in a projective way. These results draw attention to a number of points which provide the basis of further work on their possible application in management. The factors influencing the shift from one identity profile to another are closely linked with the concept of motivation; many studies have demonstrated the linked between different forms of identification and the attitudes or behaviour of the members of an organisation. Several studies have in fact shown the effects of compatible identity (or identification), on the construction of organisational involvement showing how identification impacts on significant attitudes and behaviours in members of an organisation, such as turnover, satisfaction, involvement, cooperation, acceptance of change or internalisation (Foreman & Whetten, 2002; Ashforth & Mael, 1989; Dutton et al., 1994; Reger et al.,1994). Moreover, the diversity of identity profiles and the ways in which they change suggest that differentiated managerial approaches are required, following the idea that there is no single way of reducing dissonance and that the ways of tackling identity issues in a context of change vary from one profile to another. Finally, the interpretative approach proposed by our analytic model could serve as the basis for developing management tools for framing and accompany change processes within an organisation. REFERENCES Abrams, D.; Hogg, M.A. (1987) «Language, attitudes, frame of reference and social identity: a Scottish dimension» Journal of Language and Social Psychology, vol.6, n°3-4, pp.201-213. Ashforth, B.E.; Mael, F. (1989), "Social identity theory and the organization", Academy of Management Review, vol. 14, pp.10-39. Dutton, J.E.; Dukerich, J.M.; Harquail, C.V. (1994) "Organizational Image and Member Identification", Administrative Science Quarterly, vol.39, pp.517-554. [less ▲]

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See detailBackward Euler method for single time step finite element simulation of the magnetization of high-temperature bulk superconductors with non linear conductivity
Lousberg, Grégory ULg

Conference (2008, May)

We consider a three dimensional (3D) finite element modeling of high temperature superconductors (HTS) submitted to a uniform magnetic field varying linearly with time. HTS are characterized by a non ... [more ▼]

We consider a three dimensional (3D) finite element modeling of high temperature superconductors (HTS) submitted to a uniform magnetic field varying linearly with time. HTS are characterized by a non linear conductivity described by a power law with the critical exponent, n. We implement an A- phi weak formulation into the opensource solver GetDP. Backward Euler method is used for the temporal resolution and is coupled to a non linear Picard iteration scheme for dealing with the non linear resistivity of HTS.We consider single- and multiple-time step methods and show that the single time step method produces an accurate result in a drastically reduced calculation time for HTS with large pinning strength (or similarly, with large values of n). The finite element formulation is validated by comparing the magnetization of a HTS tube calculated either with our finite element formulation or with other well-known techniques. The numerical method is then applied for comparing the magnetization of cylinders that are drilled by different periodic arrangements of columnar holes parallel to the cylinder axis. [less ▲]

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See detailViolations et risque: une analyse de cas dans l'industrie pharmaceutique.
Nyssen, Anne-Sophie ULg; Côte, Virginie

Conference (2008, May)

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See detailAgir collectivement maintenant et demain : la société du risque comme vecteur de changement
Fallon, Catherine ULg; Joris, Geoffrey ULg; Zwetkoff, Catherine ULg

Conference (2008, April 25)

Le vocable de la « Société du Risque » permet de désigner la transformation systémique des sociétés occidentales post-industrielles où l’individualisation radicale des comportements et des choix ... [more ▼]

Le vocable de la « Société du Risque » permet de désigner la transformation systémique des sociétés occidentales post-industrielles où l’individualisation radicale des comportements et des choix accompagne une transformation majeure sur le plan démographique et socio-économique . Dans les pays industrialisés, la différentiation accrue des modèles sociaux, des styles de vie et des modes de participation provoque une crise des modalités de socialisation via les instances de régulation sociale et engendre de nouvelles demandes sociales. Les citoyens ont accès à de plus en plus d’informations et exigent des gouvernants d’être plus écoutés, voire à participer directement au processus de formation de la décision politique, mettant à mal les structures traditionnelles de représentation. Les nouveaux médias et Internet jouent ici aussi un rôle majeur, puisqu’ils permettent de construire rapidement et à peu de frais des réseaux locaux ou alternatifs voire globaux, bien différents des canaux institutionnels. Ces nouveaux réseaux peuvent contribuer à former de nouvelles bases de mobilisation collective fluides et ponctuelles. Face à ces transformations sociales, le système politico-administratif peine à s’adapter et à assurer la légitimation de ses actions. Les pouvoirs publics sont appelés à définir de nouveaux cadres de gestion de l’espace public, plus réflexifs, capables d’aligner les acteurs non seulement sur l’action entreprise proprement dite mais également sur les instruments publics mobilisés, tout en s’inscrivant dans les lignes de force de la globalisation. Les questions propres à la « Société du Risque » contribuent à remodeler et élargir l’espace spatio-temporel pour la gestion des conséquences des risques modernes. Une partie croissante des décisions de régulations politiques, par exemple dans le domaine de la définition des normes d’environnement, est prise à un niveau supranational, le plus souvent européen, espace politique original qui tend à bouleverser les formes d’engagement et à générer de nouveaux instruments structurant les interactions aux différents niveaux de responsabilité. Notre contribution propose d’approfondir certaines dimensions mises en avant dans le paradigme de la « Société du Risque » pour les confronter aux nouvelles pratiques d’engagement collectif et de régulation publique observées au cours des dernières années en Région wallonne, pour tester dans quelle mesure le questionnement propre à la modernité réflexive peut contribuer à l’intelligibilité des transformations socio-politiques actuelles. [less ▲]

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See detailAujourd’hui comme hier, des jeunes s’engagent, participent et s’intéressent à la politique
Fournier, Bernard ULg; Reuchamps, Min ULg; Flaba, Elodie ULg

Conference (2008, April 25)

Today many people argue that the youth is uninterested in politics; according to them, there is amongst the young people some sort of political apathy. In fact, electoral turnout declines dramatically in ... [more ▼]

Today many people argue that the youth is uninterested in politics; according to them, there is amongst the young people some sort of political apathy. In fact, electoral turnout declines dramatically in all Western democracies, especially among the young voters. However, drawing from a survey on 1437 students (16-18 y. old), we demonstrate that some young people do engage, participate and are interested in politics. Above all, a multifaceted analysis of political participation and interest is needed to depict the political attitudes of the today’s youth. [less ▲]

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See detailMaitrisez vos actes chirurgicaux sans stress + travaux pratiques
LAMBERT, France ULg; LECLOUX, Geoffrey ULg; DEBATY, Bertrand ULg et al

Conference (2008, April 25)

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See detailLa logique, fondement ou modèle de l'arithmétique ?
Leclercq, Bruno ULg

Conference (2008, April 25)

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See detailL’actualité du fédéralisme. Perceptions et préférences fédérales des citoyens francophones belges
Reuchamps, Min ULg

Conference (2008, April 24)

In both Belgium and Canada, federalism is a hot and important topic. In order to explore the federal perceptions and preferences of the citizens in these two federations, four citizens’ meetings or ... [more ▼]

In both Belgium and Canada, federalism is a hot and important topic. In order to explore the federal perceptions and preferences of the citizens in these two federations, four citizens’ meetings or assemblies are organised: two in Belgium (in Liège, Wallonia, in French, and in Antwerp, Flanders, in Dutch), and two in Canada (in Montreal, Quebec, in French, and in Kingston, Ontario, in English). During a whole day, sixty citizens are gathered to discuss with four experts and in small groups about the federalism in their country. The organisation and the methodology of the meetings are inspired from both citizens’ assemblies and deliberative polls. The first meeting took place at the Université de Liège, on September 29, 2007. The preliminary analyses of the qualitative and quantitative data collected during the nine hours long exchanges are presented in this paper. The first analyses shed light on the relations between the federal perceptions and preferences of French-speaking Belgian citizens. The preliminary results emphasise the diversity of knowledge, attitudes and opinions on Belgian federalism and highlight the contrast between these perceptions and preferences and the federal reality of Belgium as well as its possible evolution. The second meeting took place at the Université de Montréal, on March 15, 2008 and will be followed, respectively in June and November 2008, by the meetings in Kingston and in Antwerp. [less ▲]

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See detailAre foreign profitability disclosures value-relevant ? Disaggregation resolves the puzzle
Muller, Aline ULg; Joliet, Robert

Conference (2008, April 23)

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See detailDiet, habitat use, and seed dispersal by a pigtail macaque (Macaca nemestrina leonina) troop in Khao Yai National Park (Thailand)
Huynen, Marie-Claude ULg; Latinne, Alice ULg; Savini, Tommaso ULg

Conference (2008, April 23)

While studying the influence of human proximity on the ecology of pigtail macaques, a species not well documented in continental Thailand, we collected data on ranging and foraging behaviours of a troop ... [more ▼]

While studying the influence of human proximity on the ecology of pigtail macaques, a species not well documented in continental Thailand, we collected data on ranging and foraging behaviours of a troop of Macaca nemestrina leonina living in the surroundings of Khao Yai National park tourist centre. We present here data suggesting a role as seed dispersers for the pigtails, role which has not been considered yet when analysing the importance of the frugivorous community in forest regeneration. Such a role might be however expected based on the highly frugivorous diet of the macaques, the presence of cheek pouches, and the relatively long distance they travel daily. The studied troop counts about 40 individuals, with 3 adult males for 9 adult females, and occupies a 100 ha home range with sleeping sites close to the tourist facilities. Macaques spent about 30% of their days in primary forests, and more than 60 percent in secondary forest and open areas. They consume a certain proportion of human food (6.4%), but spend most time foraging for wild food in the surrounding forest. Fruits count for an important part of their diet (76%) and, indeed, the faeces analysis reveals the presence of a high number of seeds, which size ranges up to above 15mm. Their viability was assessed using the cut-test and Tetrazolium immersion, showing a high percentage of viable seeds in the samples. Three series of seeds (defecated, spat, and control seeds) placed in germination boxes reached a high germination rate, with no uniform significant differences between defecated, spat and control seeds. Seeds without pulp, a frequent case when macaques reject them after transport and processing, seem to be more likely to germinate than seeds rejected with their pulp directly under the parent tree. These results suggest altogether that pigtail macaques are potential seed dispersers, an important factor in regard of their regular use of degraded habitat zones. [less ▲]

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See detailJupiter’s diffuse auroral emissions - Comparison of HST and Galileo data
Radioti, Aikaterini ULg; Tomás, A. T. M.; Grodent, Denis ULg et al

Conference (2008, April 18)

Based on an extensive HST FUV image database obtained between 1997 and 2007, we have studied the morphology and brightness of the equatorward diffuse auroral emissions in both Jovian hemispheres. The ... [more ▼]

Based on an extensive HST FUV image database obtained between 1997 and 2007, we have studied the morphology and brightness of the equatorward diffuse auroral emissions in both Jovian hemispheres. The emissions are wider and brighter on the dusk side than on the dawn and they often form multiple discrete arcs parallel to the main oval. What could be the origin of these equatorward diffuse emissions and their local time variations is still unclear. Galileo observations have shown changes in the electron pitch angle distributions between the inner and middle magnetosphere of Jupiter (10 to 17 RJ ) which could be associated with auroral emissions, without the need of field aligned currents. We derive the electron precipitation flux for the first time in a global scale, based on Galileo electron measurements between 10 and 17 RJ . We magnetically map this region in the ionosphere and compare the derived energy flux with the brightness of the diffuse emissions. We discuss the possibility that the energetic particle distribution in the middle magnetosphere could account for the multiple structured equatorward diffuse emissions and their local time variations. [less ▲]

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See detailObservational evidence of a localized magnetic anomaly near Jupiter’s North Pole
Grodent, Denis ULg; Bonfond, Bertrand ULg; Gérard, Jean-Claude ULg et al

Conference (2008, April 18)

We have analyzed more than 1000 HST/ACS images of Jupiter’s ultraviolet auroral emission in the northern hemisphere. A systematic planet center finding algorithm made it possible to infer reliable and ... [more ▼]

We have analyzed more than 1000 HST/ACS images of Jupiter’s ultraviolet auroral emission in the northern hemisphere. A systematic planet center finding algorithm made it possible to infer reliable and consistent jovicentric location of the auroral footprints of Io, Europa and Ganymede. These footprints form reference contours which provide an absolute magnetic mapping from the ionosphere of Jupiter to the equatorial plane, independent of any magnetic field model. So far, the VIP4 magnetic field model is the most accurate in terms of fitting the auroral emissions. However, it cannot reproduce the distorted shape of the satellites UV footpaths in the “kink region” in the northern ionosphere between S3 longitudes 80 ̊-150 ̊. We show that the model is significantly improved by decreasing the VIP4 surface magnetic field in the kink region and by adding a localized dipolar perturbation field beneath the surface. [less ▲]

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See detailUne réception chahutée : le 'Sonnet du trou du cul' de Rimbaud et Verlaine
Saint-Amand, Denis ULg

Conference (2008, April 18)

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See detailFidelity Discounts and Rebates not Justified by Costs
Petit, Nicolas ULg

Conference (2008, April 17)

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See detailSolar activity in connection with a 2.5 years periode cycle in air temperature time series using the Morlet wavelet method
Nicolay, Samuel ULg; Mabille, Georges ULg; Fettweis, Xavier ULg et al

Conference (2008, April 17)

The Morlet wavelet is applied to air temperature time series obtained from several weather stations and reveals the existence of a period cycle of 20-30 months since 1950, with an estimated amplitude of 0 ... [more ▼]

The Morlet wavelet is applied to air temperature time series obtained from several weather stations and reveals the existence of a period cycle of 20-30 months since 1950, with an estimated amplitude of 0.5 C. The origin of this period is investigated by computing the scale spectra associated to the principal indices that characterize air mass flows in the troposphere and the stratosphere, as well as the signals related to the sunspot number and the solar flux. Each analysed signal shows this period of approximatively 2.5 years. This suggests that the 2.5 years-cycle could be resulted from the solar activity. [less ▲]

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See detailAre foreign profitability disclosures value-relevant ? Disaggregation resolves the puzzle
Muller, Aline ULg; Joliet, Robert

Conference (2008, April 16)

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See detailEstimation of the 1900-2100 Greenland ice sheet surface mass balance
Fettweis, Xavier ULg

Conference (2008, April 15)

Results from a 37-year simulation (1970-2006) over the Greenland ice sheet (GrIS) with the regional climate model MAR reveals that more than 97% of the interannual variability of the modelled Surface Mass ... [more ▼]

Results from a 37-year simulation (1970-2006) over the Greenland ice sheet (GrIS) with the regional climate model MAR reveals that more than 97% of the interannual variability of the modelled Surface Mass Balance (SMB) is explained by the GrIS summer temperature anomaly and the GrIS annual precipitation anomaly. This dependence is also fully confirmed by another model using the ECMWF (re)analysis. This multiple regression is then used to empirically estimate the GrIS SMB since 1900 from climatological time series and reanalysises. The projected SMB changes in the 21st century are investigated with the set of simulations performed with AOGCM's for the IPCC Fourth Assessment Report. These estimations show that the high surface mass loss rates of these last years (1998, 2003, 2006) are not unprecedented in the GrIS history of the last hundred years. The minimum SMB rate seems to be occurred in the 1930's due to a combination of dryer and warmer years than now although the effect of the man-induced global warming was not perceptible at that time. The AOGCM's project that the SMB rate of the 1930s would be common at the end of this century. The temperature would be higher than in the 1930s but the increase of accumulation would partly offset the acceleration of surface melt due to the temperature increase. If no change will occur in the iceberg discharge rate, such negative SMB rates would be not large enough to significantly increase in the future the fresh meltwater flux from the GrIS into the ocean. However, these assumptions are based on an empirical multiple regression only currently validated and the accuracy and time homogeneity of the data sets and AOGCM results used in these estimations constitute a large uncertainty. [less ▲]

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See detailElectron Photodetachment of DNA Polyanions: Photoelectron Spectroscopy and UV Action Spectroscopy
Gabelica, Valérie ULg; Rosu, Frédéric ULg; De Pauw, Edwin ULg et al

Conference (2008, April 15)

DNA polyanions trapped in a mass spectrometer undergo electron detachment following irradiation with UV light [1-3]. Electron photodetachment is a 1-photon process, and its efficiency depends on: - The ... [more ▼]

DNA polyanions trapped in a mass spectrometer undergo electron detachment following irradiation with UV light [1-3]. Electron photodetachment is a 1-photon process, and its efficiency depends on: - The nature of the DNA bases: guanine-containing strands are the most prone to electron photodetachment, followed by adenine, cytosine, and finally thymine. - The excitation wavelength: electron detachment is maximum around 260 nm, corresponding to base excitation. - The charge of the polyanion: higher charge state ions undergo more efficient electron detachment because of the Coulombic repulsion. Here we will discuss the electron photodetachment mechanism in the light of the most recent experimental results. Because the base-dependence of electron photodetachment efficiency is correlated with the base ionization potential and is maximum at wavelengths corresponding to the base absorption, we initially proposed that electron photodetachment might occur directly from the base, and that the photodetachment yield was correlated with the electron binding energy to the base [2]. Photoelectron spectroscopy experiments were performed on DNA multiply charged anions with varying base composition to probe how the electron binding energies changes with the base composition. Finally, the electron detachment channel was used to perform UV spectroscopy experiments on large DNA polyanions trapped in the gas phase. Gas-phase UV spectra of DNA duplexes and G-quadruplexes containing up to 24 bases (> 7000 Da) will be presented. [1] V. Gabelica, T. Tabarin, R. Antoine, F. Rosu, I. Compagnon, M. Broyer, E. De Pauw, and P. Dugourd, Anal. Chem. 78, 6564 (2006). [2] V. Gabelica, F. Rosu, T. Tabarin, C. Kinet, R. Antoine, M. Broyer, E. De Pauw, and P. Dugourd, J. Am. Chem. Soc. 129, 4706 (2007). [3] V. Gabelica, F. Rosu, E. De Pauw, R. Antoine, T. Tabarin, M. Broyer, and P. Dugourd, J. Am. Soc. Mass Spectrom. 18, 1990 (2007). [less ▲]

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See detailMétaphores spatiales dans la symbolique démocratique
Herla, Anne ULg

Conference (2008, April 12)

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See detailPerceived safety climate and job resources : relationships with safety behaviour.
Chmiel, N.; Hansez, Isabelle ULg

Conference (2008, April 12)

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See detailLa cité de Nkamba : l’imaginaire kimbanguiste et son espace symbolique
Melice, Anne ULg

Conference (2008, April 12)

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See detailTranscrire un document médiéval en XML : Pour qui et comment ?
Mazziotta, Nicolas ULg; Lavrentiev, Alexei

Conference (2008, April 11)

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See detailLa procession-spectacle comme recomposition de l’espace
Delfosse, Annick ULg

Conference (2008, April 10)

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See detailSynthesis of novel functional aliphatic polyesters by association of ring-opening polymerization and click chemistry
Lecomte, Philippe ULg; Schmeits, Stephanie ULg; Riva, Raphaël ULg et al

Conference (2008, April 09)

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

Nowadays, biodegradable and biocompatible aliphatic polyesters are widely used as environmentally friendly thermoplastics and biomaterials. Nevertheless, the absence of any functional group along the chain is a severe limitation for the development of new applications. Very recently, it was reported by Emrick et al. and by us that copper(I)-mediated 1,3-dipolar Huisgen's cycloaddition of alkynes and azides, the most widely used “click” reaction in the frame of macromolecular engineering, is very efficient to derivatize aliphatic polyesters. Due to the tolerance for many functional groups, cumbersome protection and deprotection steps are not needed. One main advantage of copper(I)-mediated Huisgen's cycloaddition compared to other reactions previously used to derivatize aliphatic polyesters relies on the mildness of the experimental conditions, which results in limited degradation. Our most recent results dealing with the combination of “click” chemistry and ring-opening polymerization towards functional PCL and PLA, networks, graft and hyperbranched copolymers will be highlighted. [less ▲]

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See detailHallucinations in children and adolescents: Risk factors and treatment strategies
Laroi, Frank ULg

Conference (2008, April 05)

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See detailBelgian Communities : an increasing gap
Baye, Ariane ULg; Fagnant, Annick ULg; Hindryckx, Geneviève ULg et al

Conference (2008, April 04)

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See detailPredicting bovine milk urea concentration for future test-day records in a management perspective
Bastin, Catherine ULg; Laloux, Laurent; Bertozzi, Carlo et al

Conference (2008, April 02)

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See detailCity Branding: A Brand Concept Map Analysis
Brandt, Céline ULg; Pahud de Mortanges, Charles ULg

Conference (2008, April)

The purpose of this study is to identify the dimensions of beliefs among students choosing a university town and investigate if brand concept mapping (BCM) is applicable to cities. The city brand image is ... [more ▼]

The purpose of this study is to identify the dimensions of beliefs among students choosing a university town and investigate if brand concept mapping (BCM) is applicable to cities. The city brand image is captured through Zaltman’s Metaphor Elicitation Technique (ZMET), BCM and importance-performance ratings. The authors identified six categories of criteria used by students when selecting a university town. In applying the results to Liege, a Belgian university town, the authors showed that Liege is recognized for its nightlife, its young population and its historical heritage. This paper proposes a useful framework for city councils to assess how to compare the perception of different segments regarding cities; how to improve the city brand image; how to compare different university towns and how to attract students. Finally, the research validates earlier studies on BCM, confirms the improvement of the methodology and widens its applications to city brands. [less ▲]

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See detailEvolution of the Io footprint morphology
Bonfond, Bertrand ULg; Grodent, Denis ULg; Gérard, Jean-Claude ULg et al

Conference (2008, April)

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See detailLes identités dans le cadre de la modernisation de l’administration : frein ou levier du changement ?
Rondeaux, Giseline ULg

Conference (2008, April)

A partir de la théorie des identités organisationnelles, nous proposons d'examiner l'hypothèse d'une co-structuration des identités et des réformes: les réformes ayant un impact sur les identités, mais ... [more ▼]

A partir de la théorie des identités organisationnelles, nous proposons d'examiner l'hypothèse d'une co-structuration des identités et des réformes: les réformes ayant un impact sur les identités, mais celles-ci agissant en retour comme un filtre sur les réformes, qui dès lors seront réappropriées et mises en oeuvre de manière différenciée selon les profils identitaires en présence. Cette réflexion sera illustrée par des données empiriques provenant d'une étude de cas menée de manière longitudinale, selon une méthodologie qualitative, dans l'administration fédérale. Nous conclurons sur une série de pistes de réflexion sur les stratégies de gestion du changement au travers d'une approche basée sur les identités. [less ▲]

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See detailImplication de la compétition pour les acides aminés dans le contrôle biologique de la pourriture bleue des pommes en post-récolte
Krimi Bencheqroun, S.; Bajji, M.; Labhilili, M. et al

Conference (2008, April)

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See detailDynamic Hedge Fund Style Analysis with Errors-in-Variables
Bodson, Laurent ULg; Hübner, Georges ULg; Coën, Alain

Conference (2008, April)

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 ▲]

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See detailOcean biogeochemical cycles and climate sensitivity in an Earth system model
Mouchet, Anne ULg; Loutre, M. F.; Fichefet, T. et al

Conference (2008, April)

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See detailJupiter’s diffuse auroral emissions - Comparison of HST and Galileo data,
Radioti, Aikaterini ULg; Tomàs, A. T. M.; Grodent, Denis ULg et al

Conference (2008, April)

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See detailEstimation of the 1900-2100 Greenland ice sheet surface mass balance
Fettweis, Xavier ULg; Hanna, E.; Gallée, H. et al

Conference (2008, April)

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See detailMicrofossils in Paleoproterozoic siliciclastic successions of Karelia, Russia
Medvedev, Pavel; Javaux, Emmanuelle ULg

Conference (2008, April)

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See detailCaractérisation électrochimique de catalyseurs Pt/xérogel de carbone et Pt/aérogel de carbone
Job, Nathalie ULg; Maillard, F.; Marie, J. et al

Conference (2008, March 31)

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See detailUn événement dans la querelle antiphilosophique : Les Philosophes de Palissot en 1760
Biquet, Stéphanie ULg

Conference (2008, March 29)

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See detailParameter estimation in biochemical reaction networks: An observer-based approach
Fey, Dirk; Bullinger, Eric ULg

Conference (2008, March 27)

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See detailL'Album zutique, livre d'or, livre noir ou petit livre rouge ?
Saint-Amand, Denis ULg

Conference (2008, March 26)

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See detailHier Dinaso! Les fascistes flamands et la guerre civile en espagne
Spinoy, Erik ULg

Conference (2008, March 13)

This paper reconstructs the ambivalent attitude taken by the Flemish fascist movement Verdinaso towards the Spanish Civil War, through articles published in its weekly organ.

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See detailLe parcours linguistique antérieur des étudiants de premier BAC. Hypothèses sur les causes du malaise et présentation de quelques pistes de solution
Simons, Germain ULg

Conference (2008, March 13)

Dans cette communication, G. Simons émet différentes hypothèses susceptibles d'expliquer l'hétérogénéité croissante des niveaux de maîtrise en langue dans le secondaire et en Bac 1 à l'Université et ... [more ▼]

Dans cette communication, G. Simons émet différentes hypothèses susceptibles d'expliquer l'hétérogénéité croissante des niveaux de maîtrise en langue dans le secondaire et en Bac 1 à l'Université et propose quelques pistes de solution pour tenter de gérer celle-ci. Il se penche ensuite sur le niveau de maîtrise des élèves en langues étrangères dans le secondaire, fournit quelques éléments pouvant expliquer une "baisse de niveau", et esquisse quelques solutions pour améliorer ce niveau. La conclusion de cette communication présente une liste de mesures qui pourraient être prises pour optimiser l'enseignement des langues dans le secondaire et donc faciliter la transition des étudiants dans l'enseignement supérieur/universitaire. [less ▲]

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See detailPlus efficaces ou plus équitables, faut-il choisir ?
Lafontaine, Dominique ULg

Conference (2008, March 13)

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See detailAnalysis of hybrid hydraulic vehicles and comparison with hybrid electric vehicles using batteries or super capacitors
Louvigny, Yannick ULg; Nzisabira, Jonathan; Duysinx, Pierre ULg

Conference (2008, March 12)

Hybrid Hydraulic Vehicle (HHV) technology is an alternative solution to classical Hybrid Electric Vehicles (HEV). The authors’s previous studies of hybrid hydraulic systems clearly demonstrated that HHV ... [more ▼]

Hybrid Hydraulic Vehicle (HHV) technology is an alternative solution to classical Hybrid Electric Vehicles (HEV). The authors’s previous studies of hybrid hydraulic systems clearly demonstrated that HHV can lead to fuel savings even though smaller than HEV. Hydraulic energy recovery systems are well adapted for heavy urban vehicles with frequent starts and stops because the weight penalty of the hydraulic system can be mitigated while taking benefit of their high specific power property for power assist. This recent work investigates and compares, from an economical and technical point of view, both HHV and HEV buses using batteries or super capacitors as energy storage systems. The fuel consumption of different hybrid busses is simulated using ADVISOR on the basis of three European SORT driving cycles. The results show that HHV and HEV with super capacitors can not rival from the consumption point of view with the HEV using batteries as energy storage system. But they can be economically interesting because of their lower cost and the longer service life of their energy storage system. [less ▲]

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See detailMedical imaging
Martin, Didier ULg

Conference (2008, March 12)

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See detailPost-Mortem, high resolution (9.4 Tesla) MRI of spinal cord injury in the rat, correlated with histology
Phan Ba, Remy ULg; Scholtes, Félix ULg; Theunissen, E. et al

Conference (2008, March 12)

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See detailIL-4Ralpha responsiveness by T cells prevents peripheral induction of FoxP3-expressing regulatory T cells during TH2-polarized immune response
Dewals, Benjamin G ULg; Brombacher, Frank

Conference (2008, March 12)

Survival from Schistosoma mansoni infection requires the development of a finely regulated TH2-polarized immune response driven by the parasite egg antigens. A number of studies have proposed that S ... [more ▼]

Survival from Schistosoma mansoni infection requires the development of a finely regulated TH2-polarized immune response driven by the parasite egg antigens. A number of studies have proposed that S. mansoni egg antigens induce peripheral FoxP3-expressing regulatory T cells involved in the modulation of pro-inflammatory T helper immune responses (1-3). However, the tight regulation between antagonistic TH1, TH2 and Treg developmental programs in response to S. mansoni egg-antigens remains poorly understood. In this study, we demonstrated in vitro that IL-4 strongly inhibits TGF1-induced FoxP3 expression by naive T cells and this inhibition is dependent on IL-4R expression on T cells. Surprisingly, wild-type mice that developed a strong TH2 immune response to S. mansoni egg antigens were able to modulate the magnitude of egg-induced inflammation in contrast to mice disrupted of IL-4R globally or specifically on T cells. The TH2 response developed by wild-type mice also prevented the induction of FoxP3-expressing CD4+ T cells in the draining lymph node. This was not apparent in LckcreIL-4R-/lox or IL-4R-/- mice. In addition, IL-4 neutralization in vivo promoted the induction of FoxP3+CD4+ cells in the draining lymph node. Finally, IL-4 responsiveness by T cells induced a CD103-expressing CD4+ T cell population which produced IL-10 in response to egg antigens. Consequently, our study shows that the modulation of egg-induced inflammation is independent of FoxP3-expressing regulatory T cells but highlights a potential role of CD103-expressing CD4+ T cells as IL-10 producing regulatory T cells. [less ▲]

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See detailLa dysfonction endothéliale en néphrologie
Krzesinski, Jean-Marie ULg

Conference (2008, March 11)

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See detailRéunion scientifique de la Société Belge de Neurochirurgie
Martin, Didier ULg

Conference (2008, March 08)

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See detailNutrition during the first year of life : Impact of protein intakes
Senterre, Thibault ULg

Conference (2008, March 08)

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See detailLes soins à domicile en pédiatrie
Hoyoux, Claire; Janssen, Rita; Missotten, Pierre ULg et al

Conference (2008, March 07)

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See detailLe système éducatif de la Communauté française de Belgique
Baye, Ariane ULg

Conference (2008, March 07)

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See detailComment établir un diagnostic et évaluer un projet selon le genre ?
Cornet, Annie ULg

Conference (2008, March 05)

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See detailNouveautés sur l’étiologie de l’entéropathie épizootique du lapin
Huybens, Nathalie; HOUEIX, Julien ULg; Mainil, Jacques ULg et al

Conference (2008, March 04)

Detailed reference viewed: 6 (0 ULg)