Publications ORBi OA
Bookmark and Share    
Full Text
Peer Reviewed
See detailDouces transgressions : notes sur "La Perle" (H. d'Ursel, 1929)
Belloi, Livio ULg

in Mélusine. Cahiers du Centre de Recherche sur le Surréalisme (2004), 26

Cette étude consiste en une lecture approfondie et contextualisante d’un film belge peu connu, à savoir "La Perle" (Henri d’Ursel, 1929, sur un scénario du poète Georges Hugnet). De cet examen ... [more ▼]

Cette étude consiste en une lecture approfondie et contextualisante d’un film belge peu connu, à savoir "La Perle" (Henri d’Ursel, 1929, sur un scénario du poète Georges Hugnet). De cet examen circonstancié et spécialement attentif aux phénomènes d’intertextualité, il ressort notamment que "La Perle" tranche à bien des égards avec les autres grandes œuvres cinématographiques habituellement placées sous la bannière du surréalisme (les films de Bunuel et Dali, de Germaine Dulac, de Man Ray, etc.). En particulier, le film d’Henri d’Ursel se règle sur le principe d’une transgression douce, observant apparemment les conventions narratives, mais dans le seul but de mieux les miner de l’intérieur. Rien de très spectaculaire dans "La Perle", sinon l’expression même des tiraillements intimes dont l’esthétique surréaliste se trouve affectée, entre culture populaire (référence aux "Vampires", le célèbre film à épisodes de Louis Feuillade) et raréfaction poétique (allusion à Stéphane Mallarmé et à son "Coup de dés"). [less ▲]

Detailed reference viewed: 213 (16 ULg)
Full Text
Peer Reviewed
See detailInnovative artificial fog production device - A technical facility for research activities.
Colomb, M.; Dufour, J.; Hirech, M. et al

Conference (2004)

A new innovative fog production device has been developed in close cooperation with partners of a European project called “FOG” funded by the EU. It is set up in the fog chamber of the road and bridges ... [more ▼]

A new innovative fog production device has been developed in close cooperation with partners of a European project called “FOG” funded by the EU. It is set up in the fog chamber of the road and bridges laboratory at Clermont-Ferrand. Most of the activities of this laboratory are dedicated to road safety but the facility is open to any other activity, such as environmental research. The recent developments consist in setting up a controllable device able to produce stable visibility levels and homogeneous fog, representative of various types of natural water droplet distribution. The fog characteristics were determined and compared to natural fog. Results are presented for a selection of conditions including stabilized visibility levels for dense fog, less than 50 metres meteorological visibility and two kinds of droplet distribution. [less ▲]

Detailed reference viewed: 38 (3 ULg)
Full Text
Peer Reviewed
See detailCancer du pancréas et vertèbre d'ivoire
Guillaume, Thierry ULg; Krzesinski, Jean-Marie ULg; Lambinet, Nadine ULg

in Revue Médicale de Liège (2004), 59(12), 685-687

En résumé, nous avons donc objectivé un adénocarcinome de la tête pancréatique cliniquement asymptomatique suite à la mise en évidence d’une lésion osseuse métastatique condensante douloureuse. Le cas ... [more ▼]

En résumé, nous avons donc objectivé un adénocarcinome de la tête pancréatique cliniquement asymptomatique suite à la mise en évidence d’une lésion osseuse métastatique condensante douloureuse. Le cas d’un adénocarcinome pancréatique révélé par une métastase osseuse surtout condensante, étant relativement rare, nous a paru intéressant à rapporter. [less ▲]

Detailed reference viewed: 210 (3 ULg)
Full Text
Peer Reviewed
See detailMossbauer spectral study of the magnetocaloric FeMnP1-xAsx compounds
Hermann, Raphaël ULg; Tegus, O.; Bruck, E. et al

in Physical Review b (2004), 70(21),

The magnetic phase transitions in the FeMnP1-xAsx compounds with x= 0.25, 0.35, 0.45, 0.50, and 0.55, have been studied by iron-57 Mossbauer spectroscopy. The ferromagnetic and antiferromagnetic spectra ... [more ▼]

The magnetic phase transitions in the FeMnP1-xAsx compounds with x= 0.25, 0.35, 0.45, 0.50, and 0.55, have been studied by iron-57 Mossbauer spectroscopy. The ferromagnetic and antiferromagnetic spectra have been analyzed with a model that takes into account the random distribution of the P and As near-neighbor anions of a given iron site. This distribution is a binomial distribution of the contributions to the spectra of each iron with n As near neighbors. A magnetostriction model has been used to characterize the temperature induced paramagnetic to ferromagnetic first-order phase transition and order parameters, eta(F)=2.6, 2.3, 2.0, 1.57, and 1.43 have been obtained for x=0.25, 0.35, 0.45, 0.50, and 0.55, respectively. A detailed phase diagram has been derived from the Mossbauer spectral analysis and reveals a magnetic triple point at x=similar to0.35 and similar to210 K. A model that takes into account the random binomial P and As distribution and the contribution from the iron and manganese magnetic sublattices yields excellent fits of the spectral components assigned to the ferromagnetic and incommensurate antiferromagnetic components for the x=0.25 and 0.35 compounds at all temperatures. [less ▲]

Detailed reference viewed: 38 (2 ULg)
Full Text
See detailL’ironie dans Ounamon : les emplois de mk et de ptr
Winand, Jean ULg

in Göttinger Miszellen (2004), (200), 105-110

Detailed reference viewed: 83 (3 ULg)
Full Text
Peer Reviewed
See detailIdentification of residues within human glycoprotein VI involved in the binding to collagen: evidence for the existence of distinct binding sites.
Lecut, Christelle ULg; Arocas, Veronique; Ulrichts, Hans et al

in Journal of Biological Chemistry (2004), 279(50), 52293-9

Glycoprotein VI (GPVI) has a crucial role in platelet responses to collagen. Still, little is known about its interaction with its ligands. In binding assays using soluble or cell-expressed human GPVI, we ... [more ▼]

Glycoprotein VI (GPVI) has a crucial role in platelet responses to collagen. Still, little is known about its interaction with its ligands. In binding assays using soluble or cell-expressed human GPVI, we observed that (i) collagen, and the GPVI-specific ligands collagen-related peptides (CRP) and convulxin, competed with one another for the binding to GPVI and (ii) monoclonal antibodies directed against the extracellular part of the human receptor displayed selective inhibitory properties on GPVI interaction with its ligands. Monoclonal antibody 9E18 strongly reduced the binding of GPVI to collagen/CRP, 3F8 inhibited its interaction with convulxin, whereas 9O12 prevented all three interactions. These observations suggest that ligand-binding sites are distinct, exhibiting specific features but at the same time also sharing some common residues participating in the recognition of these ligands. The epitope of 9O12 was mapped by phage display, along with molecular modeling of human GPVI, which allowed the identification of residues within GPVI potentially involved in ligand recognition. Site-directed mutagenesis revealed that valine 34 and leucine 36 are critical for GPVI interaction with collagen and CRP. The loop might thus be part of a collagen/CRP-binding site. [less ▲]

Detailed reference viewed: 15 (6 ULg)
Full Text
Peer Reviewed
See detailPrincipal role of glycoprotein VI in alpha2beta1 and alphaIIbbeta3 activation during collagen-induced thrombus formation.
Lecut, Christelle ULg; Schoolmeester, Anne; Kuijpers, Marijke J E et al

in Arteriosclerosis, Thrombosis, and Vascular Biology (2004), 24(9), 1727-33

OBJECTIVE: High-shear perfusion of blood over collagen results in rapid platelet adhesion, aggregation, and procoagulant activity. We studied regulation of alpha2beta1 and alphaIIbbeta3 integrin ... [more ▼]

OBJECTIVE: High-shear perfusion of blood over collagen results in rapid platelet adhesion, aggregation, and procoagulant activity. We studied regulation of alpha2beta1 and alphaIIbbeta3 integrin activation during thrombus formation on collagen. METHODS AND RESULTS: Blockade of glycoprotein (GP) VI by 9O12 antibody or of P2Y purinergic receptors permitted platelet adhesion but reduced aggregate formation, fibrinogen binding, and activation of alpha2beta1 and alphaIIbbeta3, as detected with antibodies IAC-1 and PAC1 directed against activation-dependent epitopes of these integrins. Combined blockade of GPVI and P2Y receptors and thromboxane formation abolished integrin activation but still allowed adhesion of morphologically unstimulated, nonprocoagulant platelets. Exogenous ADP partly restored the suppressive effect of GPVI blockade on integrin alpha2beta1 and alphaIIbbeta3 activation. Adhesion was fully inhibited only with simultaneous blocking of GPVI and alpha2beta1, indicating that the integrin can support platelet-collagen binding in the absence of its activation. Blockade or absence of GPIbalpha only moderately influenced integrin activation and adhesion unless GPVI was inhibited. CONCLUSIONS: GPVI- and autocrine-released ADP induce affinity changes of alpha2beta1 and alphaIIbbeta3 during thrombus formation on collagen under flow. These integrin changes are dispensable for adhesion but strengthen platelet-collagen interactions and thereby collagen-induced platelet activation. Integrin activation during thrombus formation on collagen was studied using fluorescent-labeled antibodies IAC-1 and PAC1 directed against activation-dependent epitopes of alpha2beta1 and alphaIIbbeta3 integrin, respectively. Glycoprotein VI blockade by 9O12 antibody or P2Y ADP receptors reduced integrin activation along with aggregate formation and fibrinogen binding but not alpha2beta1-dependent adhesion. [less ▲]

Detailed reference viewed: 29 (2 ULg)
Full Text
Peer Reviewed
See detailL’application de la loi dans le temps en matière de roulage
Jacobs, Ann ULg

in Revue de Jurisprudence de Liège, Mons et Bruxelles (2004)

Detailed reference viewed: 67 (0 ULg)
Full Text
Peer Reviewed
See detailLa peine subsidiaire à une peine de travail
Jacobs, Ann ULg

in Revue de Droit Pénal et de Criminologie (2004)

Detailed reference viewed: 60 (4 ULg)
Full Text
Peer Reviewed
See detailPerquisitions et droits de la défense : une remise en question des pratiques par la Cour européenne des droits de l’homme ?
Jacobs, Ann ULg

in Revue de Droit Pénal et de Criminologie (2004)

Confrontation de la jurisprudence belge en matière de perquisitions à la jurisprudence de la Cour européenne des droits de l'homme, en particulier sous l'angle des mentions du mandat de perquisition et du ... [more ▼]

Confrontation de la jurisprudence belge en matière de perquisitions à la jurisprudence de la Cour européenne des droits de l'homme, en particulier sous l'angle des mentions du mandat de perquisition et du déroulement de la perquisition. [less ▲]

Detailed reference viewed: 147 (2 ULg)
Full Text
See detailNouvelles approches du diagnostic et de la pathogénie du diabète de type 1
Geenen, Vincent ULg

in Louvain Medical (2004), 123

Detailed reference viewed: 17 (0 ULg)
Full Text
Peer Reviewed
See detailParametric accelerated failure time models with random effects and an application to kidney transplant survival
Lambert, Philippe ULg; Collett, Dave; Kimber, Alan et al

in Statistics in Medicine (2004), 23

Accelerated failure time models with a shared random component are described, and are used to evaluate the effect of explanatory factors and different transplant centres on survival times following kidney ... [more ▼]

Accelerated failure time models with a shared random component are described, and are used to evaluate the effect of explanatory factors and different transplant centres on survival times following kidney transplantation. Different combinations of the distribution of the random effects and baseline hazard function are considered and the fit of such models to the transplant data is critically assessed. A mixture model that combines short- and long-term components of a hazard function is then developed, which provides a more flexible model for the hazard function. The model can incorporate different explanatory variables and random effects in each component. The model is straightforward to fit using standard statistical software, and is shown to be a good fit to the transplant data. [less ▲]

Detailed reference viewed: 41 (3 ULg)
Full Text
Peer Reviewed
See detailSpawning movements of European grayling Thymallus thymallus in the River Aisne (Belgium)
Ovidio, Michaël ULg; Parkinson, Denis; Sonny, Damien et al

in Folia Zoologica (2004), 53(1), 87-98

In three consecutive years (1998 to 2000), 20 adult grayling Thymallus thymallus (L.) (FL +/- SD: 326 +/- 43 mm) were radio-tracked during circum reproduction period (February to May) in the River Aisne ... [more ▼]

In three consecutive years (1998 to 2000), 20 adult grayling Thymallus thymallus (L.) (FL +/- SD: 326 +/- 43 mm) were radio-tracked during circum reproduction period (February to May) in the River Aisne, Belgium. Before the spawning period, grayling remained consistently in the pool-riffle sequence in which they had been captured. Pre-spawning migration time extended from 7 to 29 March. Distances travelled during the spawning migration ranged from 70 to 4980 in (mean +/- S.E.: 1234 +/- 328 m). Spawning migrations stalled under conditions of decreasing water level and increasing water temperature in a thermal range (daily mean Tdegrees) from 5 to 8 degreesC. Spawners remained from 1 to 31 days (mean +/- S.D.: 10.4 +/- 9.8 days) at the spawning grounds and performed a post-spawning homing from 28 March to 18 April in decreasing water flow and in a thermal range (daily mean Tdegrees) from 7 to 11 degreesC. This study demonstrates that migration patterns of grayling are similar between years, but with a timing adjusted as a response to annual variations of the hydroclimatic conditions. [less ▲]

Detailed reference viewed: 168 (9 ULg)
Full Text
See detailNull-Subspace Analysis for Structural Damage Monitoring in Fatigue Testing of Luminaires
Yan, Ai-Min; Marin, Frédéric; Golinval, Jean-Claude ULg

Conference given outside the academic context (2004)

A damage detection method of mechanical system based on output measurements only and on the subspace identification concept is presented. The method uses the definition of null subspace analysis of the ... [more ▼]

A damage detection method of mechanical system based on output measurements only and on the subspace identification concept is presented. The method uses the definition of null subspace analysis of the Hankel matrix. It is demonstrated to be sensitive to small-size structural damages and suitable for continuous on-line monitoring. The measured response records of structures under environmental or artificial vibrations are assembled in the Hankel matrix that is further factorized into special subspaces. The active subspace defined by the first principal components is shown to be orthonormal to the null subspace defined by the remaining principal components. Therefore, any evident increase of the residues signifies possible structural damages. The method is illustrated by an application to fatigue tests of a street lighting device (luminaires). Experimental methods and numerical calculations on luminaires are simply described and discussed. The test results show that the developed methods may be easily used to effectively monitor the damage evolution during the fatigue tests. [less ▲]

Detailed reference viewed: 38 (1 ULg)
Full Text
Peer Reviewed
See detailNon-uniform adaptive vertical grids in one-dimensional numerical ocean models
Burchard, Hans; Beckers, Jean-Marie ULg

in Ocean Modelling (2004), 6(1), 51-81

It is demonstrated in this paper how the concept of general vertical coordinates can be exploited for constructing adaptive grids in primitive equation ocean models. The term adaptive is used here in the ... [more ▼]

It is demonstrated in this paper how the concept of general vertical coordinates can be exploited for constructing adaptive grids in primitive equation ocean models. The term adaptive is used here in the sense of coordinate iso-surfaces which follow certain internal structures of the flow in such a way that higher vertical resolution is obtained in locations where vertical gradients are large. The internal structures considered here are shear and stratification. In this paper, one-dimensional models are applied in order to demonstrate the ability of such grid adaptation methods to follow internal structures even in flow situations dominated by vertical mixing processes. Here, a variational approach is considered for the generation of grids which results in a diffusion equation for the vertical coordinate. The method is tested for five different idealised and realistic scenarios with the result that the discretisation error can be significantly reduced in comparison to equidistant Cartesian grids. Some recommendations for extending these methods for three-dimensional models are given at the end of this paper. (C) 2003 Elsevier Science Ltd. All rights reserved. [less ▲]

Detailed reference viewed: 31 (8 ULg)
Full Text
Peer Reviewed
See detailLe recyclage urbain en partenariat public-privé : le ''gap funding anglais'' et la ''revitalisation urbaine'' wallonne
Halleux, Jean-Marie ULg

in Bulletin de la Société Géographique de Liège (2004), 44

Urban recycling and public-private partnership : the English « gap funding » and the Walloon « revitalisation urbaine » The English « gap funding » and the Walloon « revitalisation urbaine » are both ... [more ▼]

Urban recycling and public-private partnership : the English « gap funding » and the Walloon « revitalisation urbaine » The English « gap funding » and the Walloon « revitalisation urbaine » are both, mechanisms of public-private partnership aiming at increasing the financial profitability of urban recycling property development. The objective of their analysis is to understand why, compared with the situation in Wallonia, where the urban regeneration policy has not yet been emblematically successful, the gap funding mechanism has actually led to the renewal of several traditional urban areas. From this comparative investigation, which perfectly illustrates how partnerships are dependent of both, cultural and political traditions, we state that the English success is related with : political choices in favour of the concentration of subsidies within areas where the potential demand is strong, with the transparency of the private financial statements of account and also with a tradition of flexible planning, which is particularly in favour of the setting-up of partnership networks. [less ▲]

Detailed reference viewed: 143 (18 ULg)
Full Text
See detailAssimilation of sea surface temperature and sea surface height in a two-way nested primitive equation model of the Ligurian Sea
Barth, Alexander ULg

Doctoral thesis (2004)

A coarse grid primitive equation model of 1/4° resolution is implemented covering the whole Mediterranean Sea. Within this grid a 1/20° resolution model of the Liguro-Provençal basin and the northern part ... [more ▼]

A coarse grid primitive equation model of 1/4° resolution is implemented covering the whole Mediterranean Sea. Within this grid a 1/20° resolution model of the Liguro-Provençal basin and the northern part of the Tyrrhenian Sea is embedded. A third fine resolution model of 1/60° is nested in the latter one and simulates the dynamics of the Ligurian Sea. Comparisons between one-way and two-way nesting in representing the Northern Current (NC) are made. This system of nested models is coupled with a simplified Kalman-filter based assimilation method. The state vector for the data assimilation is composed by the temperature, salinity and elevation of the three models. The forecast error is estimated by an ensemble run by perturbing initial conditions and atmospheric forcings. The leading empirical orthogonal functions (EOF) of this ensemble are taken as the error covariance of the model forecast. This error covariance is assumed to be constant in time. Sea surface temperature (SST) and sea surface height (SSH) are assimilated in this system. Data assimilation is also used to couple the hydrodynamic model with a statistical predictor of SST in the Ligurian Sea. The forecast improvement of this hybrid modelling system is shown and applications to operational models are highlighted. [less ▲]

Detailed reference viewed: 31 (6 ULg)
Full Text
See detailMonde sauvage et monde civilisé dans le mythe : le cas d'Orion
Renaud, Jean-Michel ULg

in Charpentier, Marie-Claude (Ed.) Les espaces du sauvage dans le monde antique. Approches et définitions (2004)

Detailed reference viewed: 118 (0 ULg)
Full Text
Peer Reviewed
See detailComputation of the Malpasset dam break with a 2D conservative flow solver on a multiblock structured grid
Erpicum, Sébastien ULg; Archambeau, Pierre ULg; Dewals, Benjamin ULg et al

in Proceedings of the 6th International Conference of Hydroinformatics (2004)

In the global framework of safety, the study of the hydraulic consequences of a dam breaking, sudden and instantaneous for concrete structures, gradual for earth ones, is of major interest in the scope of ... [more ▼]

In the global framework of safety, the study of the hydraulic consequences of a dam breaking, sudden and instantaneous for concrete structures, gradual for earth ones, is of major interest in the scope of prevention policies or protection plans for populations and goods. Suitable numerical models, coupled with contemporary computational possibilities, allow engineers to forecast these complex situations with a great reliability. In this field, WOLF 2D is an efficient analysis and optimisation tool, which has been completely developed by the Applied Hydrodynamics and Hydraulic Constructions team (HACH – http://www.ulg.ac.be/hach) of the University of Liege. It is part of WOLF free surface flows computation package, which includes in the same development environment the resolutions of the 1D Saint-Venant equations, the 2D shallow-water equations as well as a physically based hydrological model and powerful optimisation capabilities based on Genetic Algorithms. The interactive and unique user-interface, with high performance pre- and post-processing, allows monitoring 3-D large-scale runs graphically while they proceed, as well as generation of 3D videos. Each code handles general multiblock meshes, dealing with natural topography and mobile bed simultaneously, for any unsteady situation with mixed regimes and moving hydraulic jumps. By this way, WOLF deals with all free surface hydraulic phenomena, from hydrological runoff and river propagation to extreme erosive flows on realistic mobile topography, such as gradual dam breaching processes. It has moreover proved its efficiency and reliability for years by numerous real applications. The first part of this paper covers a brief description of the 2D multiblock flow solver WOLF 2D and the underlying mathematical model. The second part depicts the application of WOLF computation capabilities to the well-known Malpasset dam break (France, 1959), which induced a catastrophic almost instantaneous release of 48 millions m³ of water in the Reyran river valley down to the town of Frejus and the Mediterranean sea. Data available thanks to the CADAM EU-project are used to assess the results. [less ▲]

Detailed reference viewed: 118 (5 ULg)
Full Text
Peer Reviewed
See detailModelling of the wave propagation, the coastal currents and the induced topographic changes
Fraikin, Catherine; Archambeau, Pierre ULg; Erpicum, Sébastien ULg et al

in Proceedings of the 9th International Symposium on River Sedimentation (2004)

This paper models the sea bottom evolution. This model is built up on three main parts. The first one describes the wave propagation, taking simultaneously into account the refraction, the diffraction and ... [more ▼]

This paper models the sea bottom evolution. This model is built up on three main parts. The first one describes the wave propagation, taking simultaneously into account the refraction, the diffraction and the reflection but also the energy dissipation caused by wave breaking. This model is solved by the numerical method of the finite volumes, using an iterative resolution (the GMRES method). Several validations of this model have been carried out on many examples such as harbors of various geometries and depths, beaches,… The wave induced currents are computed in the second part based on the concept of the radiation stresses describing the excess of the flux momentum caused by the waves. A model based on the complete Navier-Stokes equations integrated on the depth and associated with appropriated forcing and friction terms is used. This model is computed as an update of WOLF software (HACH, ULg) and is applied to some examples such as beaches with or without coastal structures. Finally, the third part is about the sediment transport. It exhibits the topographic modifications of the coastal sea bottom caused by the waves and their currents. A loop execution of these three models ends this work. It gives us an operational tool to describe the topographic evolution of the coastal areas caused by the incident waves, the induced currents and then the resulting sediment transport, fulfilling the objectives of this paper. [less ▲]

Detailed reference viewed: 55 (1 ULg)