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See detailCaractérisation isotopique des eaux du granite et de l’auréole métamorphique d’Oulmès (Maroc central)
Olive, Philippe; Dassargues, Alain ULiege; Griere, Olivier et al

in Integrated Water Resources management and Challenges of the Sustainable Development (2006)

Dans le bassin d’Oulmès sont exploitées et commercialisées par la société des Eaux Minérales d’Oulmès qui constitue le plus gros embouteilleur d’eaux minérales du Maroc :Sidi Ali Lala Haya. Le pluton ... [more ▼]

Dans le bassin d’Oulmès sont exploitées et commercialisées par la société des Eaux Minérales d’Oulmès qui constitue le plus gros embouteilleur d’eaux minérales du Maroc :Sidi Ali Lala Haya. Le pluton granitique, d’âge hercynien, d’Oulmès est un granite à biotite et muscovite. Il présente une fracturation très marquée et un système filonien très développé. L’altération, très poussée, se manifeste par une arénitisation généralisée qui s’étend en profondeur. Le kaolin caractérise cette altération d’origine hydrothermale. L’eau de Lalla Haya émerge dans les granites à la faveur de fissures à une température de 42°C, il s’agit d’une eau carbo-gazeuse, bicarbonatée sodique. L’auréole métamorphique générée par ce granite englobe la formation des schistes en dalles, roches métapélitiques cambro-ordoviciennes homogènes. L’eau de Sidi Ali est faiblement minéralisée, elle aussi bicarbonatée sodique avec une pression partielle de CO2 non négligeable L’utilisation de l’outil isotopique a permis de préciser un certain nombre de points concernant la recharge et l’écoulement des eaux souterraines dans le bassin d’Oulmès. Les teneurs en 18O d’une vingtaine de sources situées autour du site et étagées entre 300 et 2000 m s’alignent suivant un gradient de -0,21 ‰ / 100 m. La zone de recharge commune des eaux du granite et des schistes en dalle se situe vers 1100/1300 m. De plus le rapport 18O/D pour ces deux types d’eau indique un appauvrissement en 18O de près de 1 ‰ dû à un échange avec le CO2 magmatique. Le temps de séjour moyen des eaux dans l’auréole métamorphique est de quelques dizaines d années (présence de 3H thermonucléaire) et, au moins, de plusieurs centaines d’années dans les eaux du massif granitique (absence de 3H thermonucléaire). De la remontée de CO2 magmatique, à 14C mort, il résulte que la teneur en 14C du carbone minéral dissous est quasiment nulle et qu’il vieillit, plus ou moins, les activités en 14C du carbone minéral dissous des eaux de l’auréole. En conclusion l’eau qui s’infiltre dans les fractures du massif granitique où elle se réchauffe suivant un gradient géothermique d’environ 40°C/km. Comme le géothermomètre Na/K indique une température de 165 °C, elle atteint une profondeur de l’ordre de 2 à 3 km. Elle s’est enrichie en CO2 magmatique et remonte par effet de gaz lift et donne naissance à Lalla Haya. Cette remontée ne se limite pas au seul massif granitique mais s’étend à l’auréole métamorphique en profitant des fractures du massif et des filons de quartz en provenance du batholite où elle se mélange, en proportions variables, aux eaux récentes qui se sont infiltrées directement sur les schistes en dalles. Ce sont ces fluides hydrothermaux qui ont donné naissance aux dépôts hydrothermaux autrefois exploités en mines (Sn). [less ▲]

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See detailLarge-scale groundwater flow and transport modelling : Methodology and application to the Geer basin, Belgium
Orban, Philippe ULiege; Dassargues, Alain ULiege; Brouyère, Serge ULiege

in Stauffer, Fr.; Dassargues, Alain (Eds.) Quantitative Geology from Multiple Sources: S10 Use of multiple sources in conditioning/calibrating groundwater flow and transport models (2006)

Efficient and sustainable management of water resources should be considered from an integrated way, at the basin scale. For that purpose, physically-based, spatially distributed modelling tools has ... [more ▼]

Efficient and sustainable management of water resources should be considered from an integrated way, at the basin scale. For that purpose, physically-based, spatially distributed modelling tools has turned to be very useful. If regional groundwater flow model have been developed for years now, large scale contaminant transport models are still almost inexistent. The objective of this extended abstract is to present briefly new concepts for large transport modelling, more particularly a modelling approach, the Hybrid Finite Element Mixing Cell (HFEMC) developed by the Hydrogeology Group of the University of Liège and implemented in the 3D simulator SUFT3D. First steps for the application to the Geer basin are also presented. [less ▲]

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See detailRelationship between haptoglobin, serum amyloid A and clinical status in the survey of dairy herds during a six months period
Humblet, Marie France; Boudry, Benjamin; Guyot, Hugues ULiege et al

(2006)

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See detailAn inductive and opportunistic detection of a pedagogical pattern in a 17 online course sample
Verpoorten, Dominique ULiege; Poumay, Marianne ULiege; Delcomminette, Séverine ULiege et al

in Proceedings of the European Distance Education Network (2006)

LabSET (Support Lab for Telematic Learning – University of Liège, Belgium) applied a pedagogical pattern detection process on 17 online courses designed by faculty. The analysis unearths 11 instances of ... [more ▼]

LabSET (Support Lab for Telematic Learning – University of Liège, Belgium) applied a pedagogical pattern detection process on 17 online courses designed by faculty. The analysis unearths 11 instances of an activity structure named here RQAT (Reading-Questions/Answers-Test) which offers an alternative (among others) to the conventional lecturing, still extensively practiced in higher education. The recurrence and the relative invariance of the RQAT learning design legitimated an attempt to format it as a pedagogical pattern, used within LabSET's missions of teacher professional development. The conceptual documentation of RQAT suggests also an "illustration" of the pattern and its linkage to a taxonomy of skills. [less ▲]

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See detailAn outreach experience
Nazé, Yaël ULiege

in European Planetary Science Congress 2006 (2006)

In our technological world, Science is everywhere and to participate to the public debates, citizens will need some basic scientific notions. Raising awareness of the public in Science is thus always ... [more ▼]

In our technological world, Science is everywhere and to participate to the public debates, citizens will need some basic scientific notions. Raising awareness of the public in Science is thus always worthwhile, even though only a small fraction of the audience will envisage a career in the field. Bringing science to the layman should even be a duty for scientists: we should not forget that we are paid by taxpayers, and are part of a public service; and besides, people tend to reject things that they do not understand - to get support, scientists need to enter the public arena and confront the crowd. Relying on attractive images and a timeless fascination, astronomy is particularly suited to do that. But what should a willing astronomer do to share (his/her) knowledge? There is certainly no definitive answer for that, but a few hints can still be given. Based on personal experience, this talk will present a few tips and things to avoid in three cases: animations (for kids and grown-ups), writing, and talking. [less ▲]

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See detailA Comparison of Methods for Photospheric Abundance Determinations in K-Type Stars
Affer, L.; Micela, G.; Morel, Thierry ULiege et al

in Chemical Abundances and Mixing in Stars in the Milky Way and its Satellites, ESO ASTROPHYSICS SYMPOSIA. ISBN 978-3-540-34135-2. Springer-Verlag, 2006, p. 31 (2006)

We have performed a detailed abundance analysis of six inactive K-type stars using high-resolution optical spectra. We have used three different techniques and compared the results obtained in order to ... [more ▼]

We have performed a detailed abundance analysis of six inactive K-type stars using high-resolution optical spectra. We have used three different techniques and compared the results obtained in order to establish their respective merits and faults. The two spectroscopic methods give consistent results suggesting that non- LTE effects are small, whereas the â mixedâ spectroscopic-photometric method leads to photospheric parameters and abundances systematically lower than those obtained with the other two. We have also determined the starsâ positions in H-R diagrams and made a comparison between the gravities derived from the ionization equilibrium of the iron lines and from the evolutionary tracks: the agreement is reasonably good. [less ▲]

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See detailSelection of bacteria to decrease in vitro growth of Campylobacter jejuni and Campylobacter coli and characterization of their antagonistic activities
Marcq, Christopher ULiege; Didderen, Isabelle; Dubois Dauphin, Robin ULiege et al

in Proceedings of the Eleventh Conference on Food Microbiology (2006)

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See detailTopology optimization of electromechanical microsystems against pull-in voltage
Lemaire, Etienne ULiege; Duysinx, Pierre ULiege; Rochus, Véronique ULiege et al

(2006)

The present work is dedicated to the application of topology optimization in the multiphysic field of MEMS. Precisely, it describes how it is possible to maximize pull-in voltage of an electromechanical ... [more ▼]

The present work is dedicated to the application of topology optimization in the multiphysic field of MEMS. Precisely, it describes how it is possible to maximize pull-in voltage of an electromechanical microsystem for which the optimization domain is insulated from the electric field. The electromechanical coupling is modeled by the use of a monolithic analysis. The optimization task is completed with the help of a sequential convex linear approximation schemes (CONLIN). [less ▲]

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See detailCompletion of biological networks: the output kernel trees approach
Geurts, Pierre ULiege; Touleimat, Nizar; Dutreix, Marie et al

in Proceedings of the the Workshop on Probabilistic Modeling and Machine Learning in Structural and Systems Biology (2006)

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See detailElucidating the structure of genetic regulatory networks: a study of a second order dynamical model on artificial data
Quach, Minh; Geurts, Pierre ULiege; d Alché-Buc, Florence

in Proc. of the 14th European Symposium on Artificial Neural Networks (2006)

Learning regulatory networks from time-series of gene expres- sion is a challenging task. We propose to use synthetic data to analyze the ability of a state-space model to retrieve the network structure ... [more ▼]

Learning regulatory networks from time-series of gene expres- sion is a challenging task. We propose to use synthetic data to analyze the ability of a state-space model to retrieve the network structure while varying a number of relevant problem parameters. ROC curves together with new tools such as spectral clustering of local solutions found by EM are used to analyze these results and provide relevant insights. [less ▲]

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See detailKernelizing the output of tree-based methods
Geurts, Pierre ULiege; Wehenkel, Louis ULiege; d Alché-Buc, Florence

in Proceedings of the 23rd International Conference on Machine Learning (2006)

We extend tree-based methods to the prediction of structured outputs using a kernelization of the algorithm that allows one to grow trees as soon as a kernel can be defined on the output space. The ... [more ▼]

We extend tree-based methods to the prediction of structured outputs using a kernelization of the algorithm that allows one to grow trees as soon as a kernel can be defined on the output space. The resulting algorithm, called output kernel trees (OK3), generalizes classification and regression trees as well as tree-based ensemble methods in a principled way. It inherits several features of these methods such as interpretability, robustness to irrelevant variables, and input scalability. When only the Gram matrix over the outputs of the learning sample is given, it learns the output kernel as a function of inputs. We show that the proposed algorithm works well on an image reconstruction task and on a biological network inference problem. [less ▲]

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See detailOK3: Méthode d’arbres à sortie noyau pour la prédiction de sorties structurées et l’apprentissage de noyau
Geurts, Pierre ULiege; Wehenkel, Louis ULiege; d'Alché-Buc, Florence

in Proc. of CAP (Conférence francophone d'apprentissage) (2006)

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See detailSpatio-temporal relationships in a primitive space: an attempt to simplify spatio-temporal analysis
Hallot, Pierre ULiege

in Raubal, Martin; Miller, Harvey; Frank, Andrew (Eds.) et al Fourth International Conference, GIScience 2006 (2006)

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See detailSearching for continuum gamma-ray emission from OB associations with INTEGRAL, some preliminary results
Leyder, Jean-Christophe ULiege; Rauw, Grégor ULiege

in Populations of High Energy Sources in Galaxies (2006)

Recent studies suggested that there might be a correlation between unidentified gamma-ray sources from the third EGRET catalogue and OB associations. Moreover, when extrapolating the fluxes measured by ... [more ▼]

Recent studies suggested that there might be a correlation between unidentified gamma-ray sources from the third EGRET catalogue and OB associations. Moreover, when extrapolating the fluxes measured by EGRET at energies above 100 MeV with a power-law down to the energy range of ISGRI, the expected count rates should be large enough to be detectable with INTEGRAL. Most of those OB associations being located in the Galactic plane, they are monitored by INTEGRAL as part of the Core Program during both the Galactic Plane Scans and the Galactic Center Deep Exposure. Combining public and CP data, we have performed a search for gamma-ray emission from OB associations and the first results are presented. [less ▲]

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See detailAbout the audit of air conditioning systems : customer advising with the help of case studies and benchmarks, modelling and simulation
Alexandre, José Luis; Knight, Ian; Andre, Philippe ULiege et al

in Bertoldi, Paolo; Atanasiu, Bogdan (Eds.) Proceeding of the international conference IEECB'06 (2006)

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See detailHeat pumping and reversible air-conditioning : a new project of the international energy agency.
Afjei, Th.; Andre, Philippe ULiege; Halozan, H. et al

in Bertoldi, Paolo; Atanasiu, Bogdan (Eds.) Proceeding of the international conference IEECB'06 (2006)

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See detailStress constrained optimization using X-FEM and Level-Set description
Van Miegroet, Laurent ULiege; Jacobs, Thibault; Lemaire, Etienne ULiege et al

in Proceedings of III European Conference on Computational Mechanics. Solids, Structures and Coupled Problems in Engineering (2006)

This paper presents and describes an intermediate approach which takes its place between the two classical methods of shape and topology optimization. It is based on using the recent Level Set description ... [more ▼]

This paper presents and describes an intermediate approach which takes its place between the two classical methods of shape and topology optimization. It is based on using the recent Level Set description of the geometry and the novel eXtended Finite Element Method (X-FEM). The method benefits from the fixed mesh work using X-FEM and from the curves smoothness of the Level Set description. Design variables are shape parameters of basic geometric features. The number of design variables of this formulation remains small whereas various global and local constraints can be considered. A key problem which is investigated here is the sensitivity analysis and the way it can be carried out precisely and efficiently. Numerical applications revisit some classical 2D (academic) benchmarks from shape optimization and illustrate the great interest of using X-FEM and Level Set description together. The paper presents the results of stress constrained problems using the proposed X-FEM and Level Set based formulation. A central issue is the sensitivity analysis (related to the compliance and/or the stresses) and the way it can be carried out efficiently. A special attention is also paid to stress constrained problems which are often neglected in other Level Set Methods works. [less ▲]

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See detailGeneral approach for homogenisation of multi-turn windings in 3D FE models
Gyselinck, Johan; V Sabariego, Ruth ULiege; Dular, Patrick ULiege

in Proceedings of the Sixth international conference on computation in electromagnetics (CEM2006) (2006)

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See detailProlactine triggers a pro-inflamatory response in bovine mammary epithelial cells
Boutet, Philippe ULiege; Sulon, Joseph; Detilleux, Johann ULiege et al

in Proceedings: 24th World Buiatrics Congress (2006)

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See detailHashimoto's Encephalopathy in graves' disease
Tamagno, G.; de Carlo, E.; Beckers, Albert ULiege et al

in 23ème Congrès de la Société Française d'Endocrinologie - Abstract book (2006)

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See detailInteractions between numerical and physical modelling for the design and optimization of hydraulic structures - Example of a large hydroelectric complex
Erpicum, Sébastien ULiege; Archambeau, Pierre ULiege; Dewals, Benjamin ULiege et al

in Proceedings of the International Symposium on Hydraulic Structures, XXII Congreso Latinoamericano de Hidráhulica (2006)

This paper describes the successful combination of both physical and numerical modelling techniques applied to the scale model study of a large hydroelectric complex in India. Thanks to accurate numerical ... [more ▼]

This paper describes the successful combination of both physical and numerical modelling techniques applied to the scale model study of a large hydroelectric complex in India. Thanks to accurate numerical simulations, the physical model layout and the time to studies have been drastically reduced. First, prior to the design of the scale model, a global numerical simulation of the dam reservoir has been carried out, on the basis of the entire set of available topographic data. The simulation results supply the flow conditions in the upstream reservoir, particularly in the vicinity of the dam and the spillway crest. Subsequently, a second numerical computation has been performed to simulate the flow in a scale model representing only a small part of the reservoir upstream of the dam. The suitable correspondence between flow conditions in both cases has been demonstrated. This two-steps approach has enabled a significant reduction in the size of the scale model, and hence, a lower cost as well as a shorter delay for building the model. Simultaneously, it has been possible to decrease the scale factor at constant cost. In conclusion, the present paper provides convincing evidence that the increase in computers performance and the efficiency of contemporary free-surface flow solvers lead to useful numerical information for the optimal design and exploitation of scale models. [less ▲]

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See detailTheoretical and numerical analysis of the hydrodynamic waves induced by dam breaks and their interaction with structures located downstream
Dewals, Benjamin ULiege; Erpicum, Sébastien ULiege; Archambeau, Pierre ULiege et al

in Proceedings of the 7th National Congress on theoretical and applied Mechanics (2006)

The present paper first describes briefly the hydrodynamic model WOLF 2D, developed at the University of Liege and suitable for conducting dam break risk assessment. Secondly, the simulation of the flood ... [more ▼]

The present paper first describes briefly the hydrodynamic model WOLF 2D, developed at the University of Liege and suitable for conducting dam break risk assessment. Secondly, the simulation of the flood induced by the Malpasset dam break enables to highlight the effectiveness of WOLF 2D. Lastly, the model is applied to demonstrate the key advantages of the most contemporary approach for reproducing the effect of buildings on the flow behaviour. The recommended modelling technique is based on a high resolution Digital Elevation Model, provided by laser measurements. [less ▲]

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See detailExperimental and numerical investigations to assess and mitigate sedimentation problems: application to a large dam in India
Erpicum, Sébastien ULiege; Dewals, Benjamin ULiege; Archambeau, Pierre ULiege et al

in Proceedings of the 7th National Congress on theoretical and applied Mechanics (2006)

In the global framework of river management, sedimentation problems in dam reservoirs and adjacent structures are multiple and of major interest for designers as well as dam owners or managers. Before dam ... [more ▼]

In the global framework of river management, sedimentation problems in dam reservoirs and adjacent structures are multiple and of major interest for designers as well as dam owners or managers. Before dam construction, these problems can be assessed by several techniques. In this paper, the experimental and numerical sedimentation studies realized at the Laboratory of Applied Hydrodynamics and Hydraulic Constructions (HACH) of the University of Liège on a large hydropower plant project in India are presented. Three main issues related to sedimentation problems are analyzed in details. [less ▲]

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See detailFluid - structure interaction modeling with a coupled 1D - 2D free surface flow solver
Erpicum, Sébastien ULiege; Archambeau, Pierre ULiege; Dewals, Benjamin ULiege et al

in Proceedings of Riverflow 2006 (2006)

Wolf software is a set of coupled numerical tools developed for almost ten years for simulating a wide range of free surface flows and transport phenomena. In the scope of new applications in hydraulic ... [more ▼]

Wolf software is a set of coupled numerical tools developed for almost ten years for simulating a wide range of free surface flows and transport phenomena. In the scope of new applications in hydraulic structure design and fluid-structure interaction, additional developments have been implemented in the finite volume 2D model to deal with boundaries not aligned along axis or with moving structures. The cut cell based approach, simpler than other classical methods, is based on the division with a sub-grid of the initial Cartesian meshes. While keeping the advantages of regular grids in terms of simplicity, accuracy and storage capacity, it enables to compute instantaneous effects of a structure movement on the fluid or to deal with complex boundaries inclined compared to mesh axis. Several test cases are presented, as well as an applica-tion of the enhanced model, coupled with a 1D one, to the computation of the hydrodynamic fields induced by a lock-door movement. [less ▲]

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See detail1D and 2D solvers coupling for free surface flow modelling
Erpicum, Sébastien ULiege; Archambeau, Pierre ULiege; Dewals, Benjamin ULiege et al

in Proceedings of the 7th International Conference on Hydroinformatics (2006)

In the field of hydraulic engineering, the size of the simulations is one of the current challenges to model with precision the large areas involved by practical engineers applications. In this scope, the ... [more ▼]

In the field of hydraulic engineering, the size of the simulations is one of the current challenges to model with precision the large areas involved by practical engineers applications. In this scope, the linking in the same modelization of different solvers, each one used in the part of the simulation where its fundamental characteristics are most suitable, open the door to still unreached modelling possibilities. WOLF software includes a series of numerical tools for simulating a wide range of free surface flows and transport phenomena. This paper presents the coupling of the 1D and 2D multiblock finite volume models of WOLF to simulate in a unified way large river reaches (in 1D) with a very fine computation of local areas (in 2D). An application to the simulation of the propagation of the waves following the filling and emptying operations of a large locks system on a several kilometres long reach of the river Meuse (Belgium) is presented. [less ▲]

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See detailModelling flood events using high resolution digital elevation models and considering the sediment interaction with constructions in floodplains
Archambeau, Pierre ULiege; Erpicum, Sébastien ULiege; Dewals, Benjamin ULiege et al

in Proceedings of the 7th International Conference on Hydroinformatics (2006)

The main objective of the present paper is a description of two effective numerical 2D models to be used as strategic tools in the process of flood risks assessment and mitigation. The first one is a ... [more ▼]

The main objective of the present paper is a description of two effective numerical 2D models to be used as strategic tools in the process of flood risks assessment and mitigation. The first one is a model for hydrodynamics simplified according to the diffusive assumption while the second one is a complete model based on the shallow water equations. Each of them is solved with an efficient numerical technique (including implicit time integration schemes and GMRES linear solvers) maximizing the convergence rate towards a steady state. A practical case study, for which a high resolution Digital Elevation Model exists, will be presented. The study shows the consequences on structures of a new construction in the floodplain in terms of inundation and erosion. [less ▲]

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See detailNumerical tools for dam break risk assessment: validation and application to a large complex of dams
Dewals, Benjamin ULiege; Erpicum, Sébastien ULiege; Archambeau, Pierre ULiege et al

in Hewlett, Henry (Ed.) Improvements in reservoir construction, operation and maintenance (2006)

The present paper first describes briefly the hydrodynamic model WOLF 2D. Secondly, the simulation of the Malpasset dam break enables to highlight the effectiveness of WOLF 2D. Lastly, the model is ... [more ▼]

The present paper first describes briefly the hydrodynamic model WOLF 2D. Secondly, the simulation of the Malpasset dam break enables to highlight the effectiveness of WOLF 2D. Lastly, the model is applied to simulate the flood generated by the hypothetic collapse of a large concrete dam, which would induce three dam breaks in cascade. [less ▲]

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See detailModel of Electrostatic Actuated Deformable Mirror using Strongly Coupled Electro-Mechanical Finite Element
Rochus, Véronique ULiege; Louis, Christophe; Golinval, Jean-Claude ULiege et al

in Proceeding of Design, Test, Integration and Packaging (2006)

The aim of this paper is to deal with multi-physics simulation of micro-electro-mechanical systems (MEMS) based on an advanced numerical methodology. MEMS are very small devices in which electric as well ... [more ▼]

The aim of this paper is to deal with multi-physics simulation of micro-electro-mechanical systems (MEMS) based on an advanced numerical methodology. MEMS are very small devices in which electric as well as mechanical and fluid phenomena appear and interact. Because of their microscopic scale, strong coupling effects arise between the different physical fields, and some forces, which were negligible at macroscopic scale, have to be taken into account. In order to accurately design such micro-electro-mechanical systems, it is of primary importance to be able to handle the strong coupling between the electric and the mechanical fields. In this paper, the finite element method (FEM) is used to model the strong coupled electro-mechanical interactions and to perform static and transient analyses taking into account large mesh displacements. These analyses will be used to study the behaviour of electrostatically actuated micro-mirrors. [less ▲]

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See detailSensitivity analysis of programmed cell death and implications for crosstalk phenomena during tumor necrosis factor stimulation
Eissing, Thomas; Waldherr, Steffen; Gondro, Cedric et al

in Proc. of the 2006 IEEE Conference on Control Applications (2006)

Different methods for analyzing the sensitivity of the direct signal transduction pathway of receptor-induced apoptosis to parameter changes are presented. Apoptosis is a form of programmed cell death ... [more ▼]

Different methods for analyzing the sensitivity of the direct signal transduction pathway of receptor-induced apoptosis to parameter changes are presented. Apoptosis is a form of programmed cell death, removing unwanted cells within multicellular organisms to maintain a proper balance between cell reproduction and death. The results indicate the importance of controlling activated caspases by direct inhibition to prevent apoptosis. A misregulation of IAP molecules, one of the main inhibitors, appears to be especially critical. The results indicate how an increased production of this molecule promotes survival and might promote cancer progression, while a reduced degradation might not, thereby providing insight of potential pharmaceutical relevance and also stimulating experimental verification. The different engineering methods applied, nicely complement each other to provide valuable insight into this important process. Because IAPs, among others, are also an important connection to other signaling pathways, the results will enable a more efficient extension of the current model. This is outlined at the example of tumor necrosis factor induced signaling pathways [less ▲]

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See detailSaturation effects in diffractive scattering at LHC energies
Selyugin, O. V.; Cudell, Jean-René ULiege

in Kolganova, E.; Sissakian, A.; Kozlov, G. (Eds.) ICHEP 2006: Proceedings (2006)

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See detailEUREF Related Activities in Belgium
Bruyninx, Carine; Carpentier, Goerges; De Vidts, B. et al

in EUREF Publication No 14 (2006)

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See detailLes nouvelles orientations de l’enseignement de l’histoire à l’école secondaire en Communauté française de Belgique
Jadoulle, Jean-Louis ULiege

in B. CAULIER & L. COURTOIS (Ed.) Québec-Wallonie. Dynamique des espaces et expériences francophones (2006)

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See detailLes motifs concrets du front dans l’expression lyrique d’Apollinaire
Purnelle, Gérald ULiege

in Debon, Claude (Ed.) L’Écriture en guerre de Guillaume Apollinaire. Actes du 19e colloque international de Stavelot (2006)

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See detailAchromatic optical vortex coronagraph with subwavelength gratings
Mawet, Dimitri ULiege; Riaud, Pierre ULiege; Baudrand, J. et al

in Proceedings of the Coronagraph Workshop (2006)

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See detailCurrent generation arrays: current status, getting the most out of them and future development
Akeson, R.; ten Brummelaar, T.; Eisner, J. et al

in “Future Directions for Interferometry” (2006)

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See detailThe Future of Space-Based Interferometry
Carpenter, K. G.; Allen, R.; Benson, J. et al

in “Future Directions for Interferometry” (2006)

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See detailLa langue des vers : le cas des e post-toniques entravés
Purnelle, Gérald ULiege

in Viprey, Jean-Marie (Ed.) JADT 06. Actes des 8es Journées internationales d’Analyse statistique des Données Textuelles (2006)

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See detailResults of crossbreeding between Belgian Texel and Maroccan local breeds of sheep. Carcass characteristics and meat compositon
EL Fadili, M.; Leroy, Pascal ULiege

in Book of Abstracts of the 57th Annual Meeting of the European Association for Animal Production (2006)

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See detailGrowth and carcass performances of Belgian Blue x Nelore and Bradford cattle in Bahia state Brazil
Leroy, Pascal ULiege; Leroy, Emile ULiege; Cassart, Renaud ULiege

in World Congress on Genetics Applied to Livestock Production. Belo Horizonte, Brasil (2006)

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See detailProgrammes d'Amélioration Génétique de la production laitière Bovine Afrique de l'Ouest (Perspectives)
Boly, H.; Napo, A.; Sanogo, W. B. et al

(2006)

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See detailLe discours historiographique n’est pas réaliste : utilisations d'une étiquette par les histoires de la littérature en France et en Belgique
Provenzano, François ULiege

in Fabry, Geneviève; Roland, Hubert (Eds.) Les frontières du réalisme dans la littérature narrative du XXe siècle (2006)

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See detailLarge-scale Analysis of the human genome: from DNA sequence analysis to the modeling of replication in higher eukaryotes
Arneodo, Alain; d'Aubenton-Carafa, Y.; Audit, B. et al

in Proceeding of the 14th EUSIPCO (2006)

We explore large-scale nucleotide compositional fluctuations along the human genome through the optics of the wavelet transform mi- croscope. Analysis of the TA and GC skews reveals the existence of ... [more ▼]

We explore large-scale nucleotide compositional fluctuations along the human genome through the optics of the wavelet transform mi- croscope. Analysis of the TA and GC skews reveals the existence of strand asymmetries associated to transcription and/or replication The investigation of 14854 intron-containing genes shows that both skews display a characteristic step-like profile exhibiting sharp tran- sitions between transcribed (finite bias) and non-transcribed (zero bias) regions. As we observe for 7 out of 9 origins of replica- tion experimentally identified so far, the (AT+GC) skew exhibits rather sharp upward jumps, with a linear decreasing profile in be- tween two successive jumps. We describe a multi-scale method- ology that allows us to predict 1012 replication origins in the 22 human autosomal chromosomes. We present a model of replica- tion with well-positioned replication origins and random termina- tion sites that accounts for the observed characteristic serrated skew profiles. We emphasize these putative replication initiation zones as regions where the chromatin fiber is likely to be more open so that DNA be easily accessible. In the crowded environment of the cell nucleus, these intrinsic decondensed structural defects actually predisposes the fiber to spontaneously form rosette-like structures that provide an attractive description of genome organization into replication foci that are observed in interphase mammalian nuclei. [less ▲]

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See detailEtude de faisabilité pour la création d'une structure de transformation du lait
Duquesne, Brigitte ULiege; Frameree, C.; Demeffe, L. et al

in 11ème Carrefour des Productions animales "le lait... une filière dynamique" (2006)

Detailed reference viewed: 32 (3 ULiège)
See detail'Do plant species and climate warming influence nitrification and ammonia oxidiser community structure
Malchair, Sandrine ULiege; Carnol, Monique ULiege

in 11th International symposium on microbial ecology (ISME-11) 'The Hidden Powers – Microbial Communities in Action', Vienna, Austria, August 20-25, 2006, Book of Abstracts (2006)

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See detailCanopy-atmosphere interaction in forests: a key process in nutrient cycling and pollution interception
Carnol, Monique ULiege; Guillaume, Patricia ULiege

in Book of Abstracts, SCK-CEN-BLG-1032, Topical day on: Biogeochemical response of forest vegetation to chronic pollution: processes, dynamics and modelling (2006)

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See detailFirst practical implementation of the component method to joints in tubular construction
Weynand, K.; Busse, E.; Jaspart, Jean-Pierre ULiege

in Proceedings of the 11th International Symposium on Tubular Structures (2006)

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See detailTerritorial information, themes, indicators and sources
Devillet, Guénaël ULiege; Chen, D.

in Acts of International Conference of Territorial Intelligence (2006)

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See detailLiquid flow distribution in catalytic distillation columns : use of high-energy X-ray tomography
Aferka, Saïd ULiege; Saroha, Anil; Toye, Dominique ULiege et al

in AIChE (Ed.) AIChE Annual Meeting, Conference Proceedings, San Francisco, CA, United States, Nov. 12-17, 2006 (2006)

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See detailPituitary Diseases in Daily Clinical Pratice : Prevalence and Relevance 2006
Jaffrain-Réa, M. L.; Valle, L.; Daly, Adrian ULiege et al

in Congrès Italien d'Endocrinologie : Florence, 2006 (2006)

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See detail) Relationship between subaerial exposure features on a carbonate platform and reservoir properties (example of the Campo section, Spain, Paleocene).
Da Silva, Anne-Christine ULiege; Loisy, Corinne; Cerepi, Adrian et al

in Abstract book 17th ISC - Fukuoka, Japan - 2006 (2006)

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See detailApplication of magnetic susceptibility on different carbonate platform type
Da Silva, Anne-Christine ULiege; Boulvain, Frédéric ULiege; Mabille, Cédric ULiege

in Abstract book 17th ISC - Fukuoka, Japan - 2006 (2006)

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See detailFonctions affines par morceaux : une modélisation de la pratique des financiers
Bair, Jacques ULiege; Henry, Valérie ULiege

in Justens, Daniel (Ed.) Mathématiques concrètes (2006)

Nous montrons que les pratiques des financiers font apparaître tout naturellement des fonctions affines par morceaux.

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See detailInfluence of operating parameters on nitrite
Kouakou, Edouard; Salmon, Thierry ULiege; Marchot, Pierre ULiege et al

in Proceeding of the International Symposium on Environmental Biotechnology (2006)

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See detailEtude du colmatage dans un bioréacteur membranaire à recirculation externe utilisé en nitrification partielle
Kouakou, Edouard; Pirard, Jean-Paul ULiege; Marchot, Pierre ULiege et al

in Proceedings of MEMPRO 3 - Intégration des membranes dans les procédés (2006)

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See detailDeveloping tools for managing hydrogeological data in a semi-arid region: the case study of Oulmès (Morocco)
Ruthy, Ingrid ULiege; Orban, Philippe ULiege; Elbatloussi, D. et al

in GIRE3D: International Congress on Integrated Water Resources management and Challenges of the Sustainable Development (2006)

Data and information required by hydrogeological studies are various and complex such as geology, topography, climate, hydrological and hydrogeological raw or pre-processed data. All these data need to be ... [more ▼]

Data and information required by hydrogeological studies are various and complex such as geology, topography, climate, hydrological and hydrogeological raw or pre-processed data. All these data need to be managed, and this can be done in a structured database. A (GIS-managed) hydrogeological database has been developed previously by the Hydrogeology Group of the University of Liège (Gogu et al., 2001) in order to capture, store, edit, query, update and display geographically referenced hydrogeological data. The development of this geo-relational database was constrained by a maximum storage of data with a minimum data redundancy, reduction of storage memory capacity and optimum ‘retrievability’ of information for further analysis. In recent years, the use of Geographical Information System (GIS) has grown rapidly in groundwater management and research. GIS is now widely used to create digital geographic databases, to manipulate and prepare data as input for various model parameters, and to display model output. Coupling GIS with this hydrogeological database provides a powerful tool. This GIS-managed hydrogeological database has been also developed for vulnerability-assessment techniques and numerical modelling for groundwater flow and contaminant transport studies. As well as linking between database and GIS, the design of coupling database with process-based numerical models was also performed. This methodology has been applied, in a semi-arid region: the "Oulmès plateau" located in the Mid-Atlas (Morocco). This study has led to a detailed hydrogeological map at the scale of 1/25000. First, data were collected from existing databases, studies and maps as well as through new field measurements. These data came from numerous and various sources and in different formats (paper or digital diagrams, images, spreadsheets…). After validation, it has been encoded in the hydrogeological database. Because data are geo-referenced, it can be easily represented on the map within GIS-software. The hydrogeological map displays several layers of information as topography, hydrogeological units, hydrographic network, wells, piezometers, isoline of piezometric heads. [less ▲]

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See detailStochastic analysis of the effect of spatial variability of diffusion parameters on radionuclide transport in low permeability clay layer
Huysmans, Marijke; Dassargues, Alain ULiege

in Calibration and Reliability in Groundwater Modelling: From Uncertainty to Decision Making (2006)

Most studies that incorporate subsurface heterogeneity in groundwater flow and transport models only analyze and simulate the spatial variability of hydraulic conductivity. Heterogeneity of the other flow ... [more ▼]

Most studies that incorporate subsurface heterogeneity in groundwater flow and transport models only analyze and simulate the spatial variability of hydraulic conductivity. Heterogeneity of the other flow and transport parameters is usually neglected. This approach is often justified, but there are however cases in which disregarding the heterogeneity of the other flow and transport parameters can be questionable. In low permeability media, for instance, diffusion is often the dominant transport mechanism. It therefore seems logical to incorporate the spatial variability of the diffusion parameters in the transport model. This study therefore analyzes and simulates the spatial variability of the effective diffusion coefficient and the diffusion accessible porosity with geostatistical techniques and incorporates their heterogeneity in the transport model of a low permeability formation. The calculated output radionuclide fluxes of this model are compared with the fluxes calculated with a homogeneous model and a model with a heterogeneous hydraulic conductivity distribution. This analysis shows that the heterogeneity of the diffusion parameters has a much larger effect on the calculated output radionuclide fluxes than the heterogeneity of hydraulic conductivity. [less ▲]

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See detailHydrogeological modeling of radionuclide transport in heterogeneous low-permeability media: a comparison between Boom Clay and Ieper Clay
Huysmans, Marijke; Dassargues, Alain ULiege

in Soares, A.; Pereira, M. J.; Dimitrakopoulos, R. (Eds.) GeoENV VI: Geostatistics for Environmental Applications (2006)

Deep low-permeability clay layers are considered as possible suitable environments for disposal of high-level radioactive waste. In Belgium, the Boom Clay is the reference host formation and the Ieper ... [more ▼]

Deep low-permeability clay layers are considered as possible suitable environments for disposal of high-level radioactive waste. In Belgium, the Boom Clay is the reference host formation and the Ieper Clay an alternative host formation for research and safety and feasibility assessment of deep disposal of nuclear waste. In this study, two hydrogeological models are built to calculate the radionuclide fluxes that would migrate from a potential repository through these two clay formations. Transport parameters heterogeneity is incorporated in the models using stochastic sequential simulation of hydraulic conductivity, diffusion coefficient and diffusion accessible porosity, using primary information and several types of secondary information, i.e. resistivity, gamma ray and grain size. The calculated radionuclide fluxes in the two clay formations are compared. Results show that in the Ieper Clay larger differences between the fluxes through the lower and the upper clay boundary occur, larger total output radionuclide amounts are calculated, and a larger effect of parameter heterogeneity on the calculated fluxes is observed, compared to the Boom Clay. [less ▲]

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See detailCharacterisation of fissured aquifers in the semi-arid region of the mid-Atlas plateau (Oulmès, Morocco)
Orban, Philippe ULiege; Ruthy, Ingrid ULiege; Elbatloussi, D. et al

in GIRE3D: International Congress on Integrated Water Resources management and Challenges of the Sustainable Development (2006)

The Oulmès plateau (mid-Atlas in Morocco) is known for its groundwater resources in this semi-arid region. In the studied zone (approximately 80 km2), the mineral water of ‘Sidi Ali’ is exploited as well ... [more ▼]

The Oulmès plateau (mid-Atlas in Morocco) is known for its groundwater resources in this semi-arid region. In the studied zone (approximately 80 km2), the mineral water of ‘Sidi Ali’ is exploited as well as the naturally semi-sparkling ‘mineral water of Oulmès’ which are main mineral waters marketed in Morocco. Their sources are located at less than four kilometers from each other. In the same time, the drinking water supply to the local rural populations is far from being sufficient, and even in some places non-existent. In addition the plateau is also the place where many fruit-bearing cultures have been undertaken for a few years. Irrigation and the use of pesticide and herbicide compounds as well as fertilizers could constitute threats for the groundwater quantity and quality and unpleasant consequences are expected for all dependent groundwater end-users. Thus, in this semi-arid zone, an acute problem of sustainable development arises in terms of groundwater quantity and quality. An extended study has involved data collection, measurement campaigns (piezometric levels, sampling & analysis of groundwater), shallow geophysical prospecting, pumping tests, building of a data base, estimation of the recharge spatial distribution and hydrogeological mapping. On the basis of this study, a better understanding is possible about the state and the particular hydrodynamic behaviour of groundwater in the fissured hard-rocks of this plateau. Results are expressed in maps providing explicit and useful information allowing future decisions which can be taken for the welfare of everyone and particularly for the local populations. [less ▲]

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See detailLe système anglais présagerait-il de l'avenir en matière de qualité de l'enseignement universitaire en Communauté française de Belgique ?
Vandeweerd, Jean-Michel ULiege; Mignon, Jacques ULiege; Reggers, Thérèse ULiege

in Actes du 22e congrès de l’Association internationale de pédagogie universitaire (AIPU) (2006)

Issues du monde industriel, les démarches d'amélioration de la qualité se sont rapidement étendues aux autres secteurs. Elles faisaient cependant défaut au niveau de l'enseignement supérieur en Communauté ... [more ▼]

Issues du monde industriel, les démarches d'amélioration de la qualité se sont rapidement étendues aux autres secteurs. Elles faisaient cependant défaut au niveau de l'enseignement supérieur en Communauté française de Belgique. Comblant cette lacune, celle-ci vient de se doter d'un outil de gestion de la qualité de son enseignement. L’Agence d’Evaluation de la Qualité de l'Enseignement Supérieur (AEQES) a été constituée au premier janvier 2003. La première réunion s'est tenue un an plus tard (23 janvier 2004). Elle doit permettre de répondre aux recommandations européennes déjà arrêtées en la matière, d’assurer la représentation de la Communauté française de Belgique dans les instances concernées, mais surtout de doter cette communauté d'une structure organisant l'évaluation de la qualité de l'enseignement au sein des établissements. Dans ce contexte, il est peu probable d’échapper à un courant d’inspiration anglo-saxonne en matière de qualité de l’enseignement supérieur dans lequel le processus qualité est considéré comme un ROI (Return On Investment) ou un processus d'amélioration continue dépendant des moyens (humains, technologiques, financiers, …) qui lui sont consacrés. Le cas qui suit concerne le travail de réflexion d’une trentaine de professionnels autour de la démarche qualité dans l’enseignement supérieur en Communauté française de Belgique. [less ▲]

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See detailFormer à l'information : Pourquoi ? Comment ?
Pochet, Bernard ULiege

in FADBEN (Ed.) 7è congrès des enseignants documentalistes de l'Educaton nationale - Information et démocratie. Formons nos citoyens (2006)

Force est de constater qu'il n'existe pas de capacité innée de repérage et d'exploitation de l'information. Ce sont des compétences qui s'acquièrent et pour lesquelles l'enseignement, l'école, a un rôle ... [more ▼]

Force est de constater qu'il n'existe pas de capacité innée de repérage et d'exploitation de l'information. Ce sont des compétences qui s'acquièrent et pour lesquelles l'enseignement, l'école, a un rôle essentiel à jouer. Il s'agit de compétences fondamentales donnant les moyens à l'individu, l'élève, l'étudiant, le travailleur, d'accéder à d'autres compétences et d'être un citoyen responsable à même de juger de la valeur réelle d’une information et d’avoir vis-à-vis d’elle une attitude critique lui permettant d’agir efficacement sur son environnement. La simplification apparente de l'accès à l'information amène à entendre un discours politique particulièrement simplificateur, davantage inquiet des aspects techniques de l'accès à « des informations » que du réel problème posé par la formation des utilisateurs. Il faut bien constater que souvent, il n'y a aucune volonté politique vis-à-vis du problème de la formation documentaire, comme il y en a si peu, en Belgique en tout cas, vis-à-vis du livre et de la documentation en général. Au cours de cette communication, nous tenterons de répondre aux questions posées ci-dessus, à la lumière de la réalité de l'enseignement supérieur en Communauté française de Belgique et de notre expérience au sein du groupe EduDOC. [less ▲]

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See detailPrévention - normes de construction - Introduction à l'Eurocode 8 et à son annexe nationale belge
Plumier, André ULiege; Degée, Hervé ULiege

in Actes du Colloque "Evaluation et prévention du risque sismique en Région Wallonne" (2006)

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See detailAdvantages of using dissipative connections in the diagonals of high rise concentric braced frames
Doneux, C. L.; Plumier, André ULiege; Degée, Hervé ULiege

in Mazzolani; Wada (Eds.) Proceedings of the STESSA Conference (2006)

The paper presents a quantitative comparison of two seismic design of a concentric braced frame of 15 storey height for a 0.4 g PGA: one classical design in which connections of diagonals are capacity ... [more ▼]

The paper presents a quantitative comparison of two seismic design of a concentric braced frame of 15 storey height for a 0.4 g PGA: one classical design in which connections of diagonals are capacity designed to the diagonal sections and one innovative design introducing dissipative connections at the ends of the diagonals. The structures are first designed by equivalent static design. Pushover analysis and non linear dynamic analyses are then performed to compare the real behavior and performance of the structures. The advantages of using dissipative connections are confirmed in a high rise flexible building. [less ▲]

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See detailDuctility of fully encased composite columns used to obviate soft storey mechanisms in reinforced concrete frames
Degée, Hervé ULiege; Doneux, C. L.; Plumier, André ULiege

in Mazzolani; Wada (Eds.) Proceedings of the STESSA Conference (2006)

This paper presents a non linear finite element numerical modelling of reinforced concrete and fully encased composite columns. The model is a multi fibres beam with mono-axial non linear material laws ... [more ▼]

This paper presents a non linear finite element numerical modelling of reinforced concrete and fully encased composite columns. The model is a multi fibres beam with mono-axial non linear material laws for concrete, steel and reinforcing steel. The crushing of concrete in compression and the cracking in tension are taken into account. The steel behaviour is elastic-plastic with strain hardening. After calibration against the experimental results, a parametric study is performed. The main objective is to obtain the full moment-rotation behaviour of the columns under different level of axial forces and with different resistance of concrete, and to deduce ductility and rotation capacity of the composite sections. [less ▲]

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See detailGuide technique parasismique belge - Fondements théoriques et expérimentaux
Degée, Hervé ULiege; Plumier, André ULiege

in Actes du Colloque "Evaluation et prévention du risque sismique en Région Wallonne" (2006)

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See detailInteractive buckling of thin-walled rectangular hollow sections - a comparison between beam models and shell finite elements.
Degée, Hervé ULiege; Boissonnade, Nicolas

in Mota Soares, C. A. (Ed.) Proceedings of the 3rd European Conference on Computational Mechanics, Solids, Structures and Coupled Problems in Engineering (2006)

This paper presents a special beam finite element accounting for a possible deformation of the cross section of the member. The element is based on the superposition of a classical beam displacement field ... [more ▼]

This paper presents a special beam finite element accounting for a possible deformation of the cross section of the member. The element is based on the superposition of a classical beam displacement field and of a local field describing local effects, with an approximation on the local second order membrane stress field. The methodology is presented as an efficient alternative solution to shell FE models. It is applied to the analysis of profiles with rectangular hollow section susceptible to both global and local buckling. Different kinds of analyses are presented (computation of critical bifurcation loads, geometrically non linear analysis, geometrically and materially non linear analysis) [less ▲]

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See detailA non-linear 3D beam finite element for the study of steel frames with tapered members
Boissonnade, N.; Degée, Hervé ULiege

in Mota Soares, C. A. (Ed.) Proceedings of the 3rd European Conference on Computational Mechanics, Solids, Structures and Coupled Problems in Engineering (2006)

This paper presents the essentials of an original geometrically and materially nonlinear 3-D tapered beam finite element. The theoretical bases of the element are described, with particular attention paid ... [more ▼]

This paper presents the essentials of an original geometrically and materially nonlinear 3-D tapered beam finite element. The theoretical bases of the element are described, with particular attention paid to the choice of an appropriate displacement field and to the corresponding non-linear axial strains. Specific numerical problems met in the development of the finite element are examined, concerning mainly shear and membrane locking and the handling of rigid body motions. Worked examples on isolated members are presented for various types of analyses: elastic linear, elastic critical and geometrically and materially non-linear analyses. Good accuracy with reference to numerical results is shown, as well as good convergence properties. It is also demonstrated – analytically and numerically – that the use of prismatic beam finite elements for the analysis of tapered beams (segmentation technique) may lead to significant discrepancies when the behaviour is influenced by torsional aspects. Then, the behaviour of two different portal frames with tapered members is proposed, and the results obtained using shell elements, tapered beam elements and prismatic beam elements are compared. This comparison shows that the use of tapered elements leads to results in close agreement with those obtained by shell elements, unlike the prismatic ones. The convenience of the tapered beam element is also highlighted since the total number of degrees of freedom required is significantly reduced compared to a shell modelling, leading to easier meshing, shorter computation time and easier interpretation of results. [less ▲]

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See detailNon Gaussian Response of Bridges Subjected to Turbulent Wind – Effect of the non Linearity of Aerodynamic Coefficients
Denoël, Vincent ULiege; Degée, Hervé ULiege

in Proceedings of the 3rd European Conference on Computational Solid and Structural Mechanics (2006)

In the context of a non linear quasi-steady wind loading, this paper shows the importance of the non linearity of the wind loading. More particularly, it focuses of the influence, on the structural ... [more ▼]

In the context of a non linear quasi-steady wind loading, this paper shows the importance of the non linearity of the wind loading. More particularly, it focuses of the influence, on the structural response, of the non linearity of the aerodynamic coefficients. It is shown that, in case of 2-D turbulent flow, the influence of this kind of non linearity may be significant. To do so, statistical characteristics of the loading as well as those of the response are computed in such a turbulent flow. [less ▲]

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See detailInteraction of global and local buckling of compression members with welded box cross section
Kuhlmann, U.; Degée, Hervé ULiege; Detzel, A.

in Camotim, D. (Ed.) Proceedings of the SDSS Conference (STABILITY AND DUCTILITY OF STEEL STRUCTURES) (2006)

This paper summarises a research project that analysed aspects of stability failure of thin-walled compression members that are likely to exhibit combined global and local buckling. In particular the ... [more ▼]

This paper summarises a research project that analysed aspects of stability failure of thin-walled compression members that are likely to exhibit combined global and local buckling. In particular the influence of various imperfections on the load-carrying capacity, namely welding residual stresses and local as well as global geometrical defects was subject of detailed experimental and numerical investigations. The insight into the structural behaviour has led in the case of thin-walled box sections to a proposal for a modification of the non-dimensional slenderness value used in the buckling verification and to the recommendation of a shift of the applied European buckling curve to a more favourable one. [less ▲]

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See detailExperimental investigation on the seismic behaviour of masonry housing in low seismicity areas
Degée, Hervé ULiege; Plumier, André ULiege

in Proceedings of the 1st European Conference on Earthquake Engineering and Seismology (2006)

This contribution presents the results of an experimental investigation carried out on the shaking table of the National Laboratory of Civil Engineering of Lisbon (LNEC), in order to validate the ... [more ▼]

This contribution presents the results of an experimental investigation carried out on the shaking table of the National Laboratory of Civil Engineering of Lisbon (LNEC), in order to validate the efficiency of some constructive proposals aiming at improving the structural behaviour of non engineered masonry housing subjected to low to moderate seismic action, with rather low costs compared to traditional North-European practice. Two specimens have been tested. These specimens were two full-scale small houses with two levels. The first one was built as a traditional Belgian house, while the second included some anti-seismic technical details. The main conclusions are that both specimens were still standing at the maximum earthquake level foreseen for Belgium, but that the improved model was much less damaged regarding crack openings in the walls. Therefore the economic consequences and repair costs would be much lower with these improvements. However the maximum ground acceleration that can be sustained by the structures seems to be very little influenced by the constructional detailing. [less ▲]

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See detailA simplified method to account for the non linearity of aerodynamic coefficients in the analysis of wind-loaded bridges
Denoël, Vincent ULiege; Degée, Hervé ULiege

in Proceedings of the 7th National Congres on Theoretical and Applied Mechanics (2006)

Based on a non linear quasi-steady wind model, this paper presents the statistical characteristics of the wind loading. These statistical characteristics are computed in an analysical way and validated ... [more ▼]

Based on a non linear quasi-steady wind model, this paper presents the statistical characteristics of the wind loading. These statistical characteristics are computed in an analysical way and validated thanks to a Monte Carlo simulation.After this validation, a parametric study allows giving some general observations concerning the non Gaussianity of the loading. Statistical moments up to the fourth order are computed in an analytical way. The subsequent relations are expressed as a function of the slope and curvature of the aerodynamic coefficients. They are a usefull tool for the assessment of the non Gaussianity of the wind loading on any bridge deck. This is illustrated for three famous European bridges. [less ▲]

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See detailProposals for better seismic resistance masonry housing and validation by shaking table tests
Degée, Hervé ULiege; Doneux, C. L.; Plumier, André ULiege

in Proceedings of the National Conference on Theoretical and Applied Mechanics (2006)

This paper presents results of a research on the development of specific constructional details for non engineered masonry housing in low seismicity areas. It presents then an experimental investigation ... [more ▼]

This paper presents results of a research on the development of specific constructional details for non engineered masonry housing in low seismicity areas. It presents then an experimental investigation on shaking table aiming at validating the proposals made in the first part of the paper. [less ▲]

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See detailNumerical study of the fatigue crack in welded beam-to-column connection using cohesive zone model
Lequesne, Cédric ULiege; Plumier, André ULiege; Degée, Hervé ULiege et al

in Proceedings of the International Conference on Fracture and Damage Mechanics V (2006)

The fatigue behaviour of the welded beam-to-column connections of steel moment resisting frame in seismic area must be evaluated. The cohesive zone model is an efficient solution to study such connections ... [more ▼]

The fatigue behaviour of the welded beam-to-column connections of steel moment resisting frame in seismic area must be evaluated. The cohesive zone model is an efficient solution to study such connections by finite elements. It respects the energetic conservation and avoids numerical issues. A three-dimensional cohesive zone model element has been implemented in the home made finite element code Lagamine [1]. It is coupled with the fatigue continuum damage model of Lemaître and Chaboche [2]. The cohesive parameters are identified by the inverse method applied on a three points bending test modelling. [less ▲]

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See detailCoupled instabilities of steel box sections
Kuhlmann, U.; Detzel, A.; Degée, Hervé ULiege

in Proceddings of the 6th European Solid Mechanics Conference ESMC 2006 (2006)

Thin walled columns are subject to stability failure on local (plate buckling) and global (column buckling) level. Both buckling phenomena interact. A proposal for the use of EBC for the determination of ... [more ▼]

Thin walled columns are subject to stability failure on local (plate buckling) and global (column buckling) level. Both buckling phenomena interact. A proposal for the use of EBC for the determination of the carrying capacity of welded steel box sections is given and compared to an extensive numerical simulation study. [less ▲]

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See detailPractical use of dissipative connections in high rise frames with concentric bracings
Degée, Hervé ULiege; Plumier, André ULiege; Doneux, C. L.

in Proceedings of the ICMS Conference (2006)

A quantitative comparison of two 15 storey high framesdesigned to resist a 0.4g PGAhas been made: one frame corresponds to a standard design in which connections of diagonals are capacity designed to the ... [more ▼]

A quantitative comparison of two 15 storey high framesdesigned to resist a 0.4g PGAhas been made: one frame corresponds to a standard design in which connections of diagonals are capacity designed to the diagonal sections and the other one uses dissipative connections at the diagonals ends. The structures are designed by a standard elastic procedure under reduced forces. Pushover analysis and non linear dynamic analyses are then performed to assess the real behavior and performance of the structures. The advantages of using dissipative connections are confirmed in a high rise flexible building. [less ▲]

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See detailDuctility of encased composite columns
Degée, Hervé ULiege; Doneux, C. L.; Plumier

in Proceedings of the ICMS Conference (2006)

This paper presents results ofanumerical study onreinforced concrete and fully encased composite columns designed according to the “Inerd” concept aiming at obviating the soft storey mechanism in frames ... [more ▼]

This paper presents results ofanumerical study onreinforced concrete and fully encased composite columns designed according to the “Inerd” concept aiming at obviating the soft storey mechanism in frames subjected to earthquake. The model uses fibre beam elements with mono-axial non linear material laws for concrete, steel and reinforcing steel. The crushing of concrete in compression and the cracking in tension are taken into account. The steel behaviour is elastic-plastic with strain hardening. After calibration of the model against experimental results, a parametric study is performed. The main objective is to generate the cyclic moment-rotation curves of the columns under different level of axial forces and with different proper-ties of concrete and then to deduce ductility and rotation capacity of the composite sections from these curves. [less ▲]

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See detailExperimental and numerical investigations for I-girders in bending and shear stiffened by closed trapezoidal stiffeners
Boissonnade, N.; Degée, Hervé ULiege; Naumes, J. et al

in Proceedings of the ICMS Conference (2006)

The paper investigates the shear resistance of I-girders longitudinally stiffened by closed trape-zoidal stiffeners. It first reports on 4 full-scale tests performed at RWTH Aachen, on stiffened panels ... [more ▼]

The paper investigates the shear resistance of I-girders longitudinally stiffened by closed trape-zoidal stiffeners. It first reports on 4 full-scale tests performed at RWTH Aachen, on stiffened panels with strong closed stiffeners. As expected, failure in the subpanels has been governing. A devoted FEA shell model is then described and validated towards these results and other experimental sources. Parametric stud-ies led with the numerical tool help pointing out several aspects where the Eurocode 3 Part 1.5 recommenda-tions on stiffened panels in bending and shear may be improved. [less ▲]

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See detailDecision making numerical tools for the rehabilitation of hydraulic structures - Application to the Nisramont dam in Belgium
Erpicum, Sébastien ULiege; Archambeau, Pierre ULiege; Dewals, Benjamin ULiege et al

in Proceedings of the ICOLD 22th Congress (2006)

In the global framework of climate change, hydraulic structures rehabilitation is an up-to-date subject requiring appropriate design and impact studies. In this scope, upgrading the release facilities of ... [more ▼]

In the global framework of climate change, hydraulic structures rehabilitation is an up-to-date subject requiring appropriate design and impact studies. In this scope, upgrading the release facilities of dams is an important point since any badly controlled rise of water level in the reservoir leads usually to both up and downstream consequences, often irreversible. Suitable numerical models, coupled with contemporary computational possibilities, allow today engineers to forecast the complex situations induced on real structures by extreme events with increasing representativeness and accuracy. In this field, WOLF software, a process oriented free surface flows computation package completely set up by the HACH team, has proved its efficiency and reliability for years through numerous theoretical, experimental as well as on real structures applications. In this paper, the rehabilitation study of the Nisramont dam (Belgium) is presented. Located on the Ourthe River, a few kilometers upstream of the town of La Roche, this 21-meter high dam came into service in 1958 and was, in a first time, dedicated to be used as a cofferdam during the construction of a downstream larger reservoir of 250 hm³. But this second dam was never built and Nisramont became a definitive reservoir of 3 hm³ assuming the drinking water supply of a large part of the population of the south of Belgium and producing hydro-electricity. Due to its temporary primary tasks, the stilling basin downstream of the three 12.5 m large notches of the crest spillway has been designed for a short time use. Similarly, the 3 bottom outlets have never been equipped with valves and are thus unusable for the reservoir management. In order to secure the structure and to make it comply with its definitive working objectives, while taking into account climate change observations, the Ministère wallon de l’Equipement et des Transport (MET) - Direction des barrages de l’Est (D. 241) entrusted the HACH with evaluating up to date critical flood discharges and with designing a system in accord with these new values for the rehabilitation of the bottom outlets and the evacuation of the floods to the downstream river. This study has mainly been carried out using software of the WOLF package, successively applied to model really observed extreme events on the structure, to define new peak flow discharge and to design the stilling basin. [less ▲]

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See detailQTL fine-mapping: experience in French dairy cattle
Gautier, M.; Druet, Tom ULiege; Fritz, S. et al

in Proceedings of the 8th World Congress on Genetics Applied to Livestock Production (2006)

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See detailDetection of Quantitative Trait Loci for reproduction and production traits in Large White and French Landrace pig populations
Tribout, T.; Iannuccelli, N.; Druet, Tom ULiege et al

in Proceedings of the 8th World Congress on Genetics Applied to Livestock Production (2006)

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See detailExact validation of breeding value prediction software
Leclerc, H.; Druet, Tom ULiege; Ducrocq, V.

in Proceedings of the 8th World Congress on Genetics Applied to Livestock Production (2006)

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See detailLa sélection assistée par marqueurs: un apport de la génomique pour la sélection en bovins laitiers
Druet, Tom ULiege; Fritz, S.; Gautier, M.

in Onzième Carrefour des productions animales (2006)

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See detailImplementation of marker-assisted selection: practical lessons from dairy cattle
Boichard, D.; Fritz, S.; Rossignol, M. N. et al

in Proceedings of the 8th World Congress on Genetics Applied to Livestock Production (2006)

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See detailInnovations in software packages in quantitative genetics
Druet, Tom ULiege; Ducrocq, V.

in Proceedings of the 8th World Congress on Genetics Applied to Livestock Production (2006)

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See detailUnusual Applicatio Of Ion Beam Analysis For The Study Of Surface Layers On Materials Relevant to Cultural Heritage
Mathis, François ULiege; Salomon, Joseph; Trocellier, Patrick et al

in Hadzievski, Ljupco; Marinkovic, Bratislav; Simonovic, Nenad (Eds.) The physics of Ionized Gases (2006)

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See detailDetection of Quantitative Trait Loci for sow reproduction traits using multivariate analyses
Rosendo, A.; Bidanel, J. P.; Druet, Tom ULiege et al

in Proceedings of the 8th World Congress on Genetics Applied to Livestock Production (2006)

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See detailStructure of linkage disequilibrium and length of IBD segments in simulated populations
Ytournel, F.; Gilbert, H.; Druet, Tom ULiege et al

in Proceedings of the 8th World Congress on Genetics Applied to Livestock Production (2006)

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See detailStranding of a humpback whale (Megaptera novaeangliae) on the Belgian coast
Jauniaux, Thierry ULiege; Brenez, C.; Haelters, J. et al

in proceeding of the annual conference (2006)

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See detailEvolution des échouages et des causes de mortalité des mammifères marins dans le nord de la France (1995-2005)
Jauniaux, Thierry ULiege; Brenez, C.; Haelters, J. et al

in annual proceeding (2006)

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See detailUtiliser le tableur en toute autonomie
Vandeput, Etienne ULiege; Colinet, Monique

in Pochon, Luc-Olivier; Bruillard, Éric; Maréchal, Anne (Eds.) Apprendre (avec) les progiciels Entre apprentissages scolaires et pratiques professionnelles (2006)

Cet article identifie les invariants des progiciels tableurs dans la perspective d'en enseigner les principes organisateurs essentiels. Dans sa deuxième partie, des exemples plutôt inhabituels d'exercices ... [more ▼]

Cet article identifie les invariants des progiciels tableurs dans la perspective d'en enseigner les principes organisateurs essentiels. Dans sa deuxième partie, des exemples plutôt inhabituels d'exercices liés à la maîtrise de ces invariants sont proposés et commentés. [less ▲]

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See detailÉtiquettes de médicaments, listes de drogues, prescriptions et réceptaires dans l'Égypte gréco-romaine et byzantine
Marganne, Marie-Hélène ULiege

in Collard, Franck; Samana, Evelyne (Eds.) Pharmacopoles et apothicaires. Les "pharmaciens" de l'Antiquité au Grand Siècle (2006)

Survey of the greek papyri with drugs'names, lists of drugs, prescriptions and receptaries in Graeco-Roman and Byzantine Egypt

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See detailEffects of lipopeptidesonmodel membranes
Deleu, Magali ULiege

in 6th annual surface and colloid symposium: lipid-peptide interactions and biological function (2006)

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See detailAdvanced particle characterization for improved; understanding of spray coating quality
Pirard, Eric ULiege; Campana, Florent; Janssen, Jean-Pierre

in Proceedings International Thermal Spray Conference (2006)

The size and shape of individual particles are essential characteristics to control their behavior during spraying. Thanks to recently available technology in powder image analysis, this paper ... [more ▼]

The size and shape of individual particles are essential characteristics to control their behavior during spraying. Thanks to recently available technology in powder image analysis, this paper investigates the correlation between the geometric properties of several thousands of particles and their flowability (Hall flowmeter) and apparent density (Scott volumeter). Four different chromium carbide Cr3C2-NiCr 75/25 powders used for HVOF wear / oxidation resistant coatings are studied. The coating quality obtained for each powder by the HVOF spraying process is further investigated using metallographic image analysis. [less ▲]

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See detailWhat did we recently learned on and from equine Doppler echocardiography ?
Amory, Hélène ULiege; Pirard, L; Sandersen, Charlotte ULiege

in Proceedings of the Resident Meeting of the European College of Equine Internal medicine (ECEIM) (2006)

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See detailProtection and maintenance of permanent pastures
Gobin, B.; Brodsky, L.; Tychon, Bernard ULiege et al

in Kay, Simon; Sima, Aleksandra; Loudjani, Philippe (Eds.) Proceedings of the 12th MARS PAC Annual Conference, 2006 (2006)

All farmers receiving direct payments are subject to compulsory cross-compliance which includes standards related to the maintenance and protection of permanent pastures. Questionnaire techniques and ... [more ▼]

All farmers receiving direct payments are subject to compulsory cross-compliance which includes standards related to the maintenance and protection of permanent pastures. Questionnaire techniques and spatio-temporal analyses demonstrated that the ratio of permanent pasture area to agricultural land provides a simple tool for monitoring and controlling the protection of permanent pastures at the regional to Member State level. Huge variations in the ratio across Europe were related to the importance of permanent pastures, the interpretation of definitions, sources of information used, differences in calculation, and the presence of protective and/or sensitive zones. Precautionary or complementary measures are in place in most Member States in order to prevent decreases in the ratio. The implementation of GAEC standards related to permanent pastures overlaps with the standard management requirements, national legislation and current agri-environmental programmes. The study advocates the establishment of a comprehensive geo-information platform consisting of a topologically correct inventory of all permanent pasture parcels in a 1:1 geo-referenced relation between IACS and LPIS; ancillary spatially explicit data such as orthophotos, remote sensing images and other thematic geo-databases; and, geodatabases with parcel information compiled for other monitoring purposes such as those within the framework of the Nitrates Directive or 2nd pillar support. [less ▲]

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See detailEvolution of a dozen non-CO2 greenhouse gases above Central Europe since the mid-1980s.
Zander, Rodolphe ULiege; Mahieu, Emmanuel ULiege; Demoulin, Philippe ULiege et al

in Proceedings of the 4th International Symposium on Non-CO2 Greenhouse Gases (2006)

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See detailÀ la recherche de l'œuvre perdue d'Héliodore
Marganne, Marie-Hélène ULiege

in Boudon Millot, Véronique; Garzya, Antonio; Jouanna, Jacques (Eds.) et al Ecdotica e ricezione dei testi medici greci. Atti del V Convegno internazionale, Napoli, 1-2 ottobre 2004 (2006)

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See detailEcrire et dessiner en éveil scientifique: Un reflet des apprentissages et des potentialités des élèves
Giot, Bernadette ULiege; Quittre, Valérie ULiege

in Actes du 4e Congrès des chercheurs en Education, Namur, 21 et 22 mars 2006. (2006)

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See detailHydrogeological mapping of the Walloon region (Belgium).
Bouezmarni, Mohamed ULiege

in Proceedings of the 5th european congress on regional geoscientific cartography and information systems. (2006)

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See detailCartographie au moyen de marqueurs microsatellites des gènes de Gossypium sturtanium Willis responsables de l'inhibition de la synthèse du gossypoll uniquement dans la graine du cotonnier
Benbouza, H.; Lacape, M.; Courtois, B. et al

in Actes des Xèmes Journées Scientifiques du Réseau "Biotechnologies végétales : Quelles biotechnologies pour une agriculture durable ?" (2006)

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