References of "Scientific congresses and symposiums"
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See detailIdentity dynamics in post‐NPM administration: A subtle two‐step between contents and context.
Rondeaux, Giseline ULg; Pichault, François ULg

in Proceedings of the 23rd EGOS Conference: "Beyond Waltz - Dances of Individuals and Organization" (2007)

Due to the current need for modernization, many public administrations are faced with a series of reform processes, under various forms and concerning several aspects of the administration. One can ... [more ▼]

Due to the current need for modernization, many public administrations are faced with a series of reform processes, under various forms and concerning several aspects of the administration. One can reasonably suppose that these upheavals have effects on civil servants, on their relationship with the organisation and on the way they see it. Within such a large issue, our main concern is to question the existence of links between a major planned change within an administration (such as a NPM reform) and its organizational identities. Three positions can be tested: • the impact: public reforms involve the transformation of identities; • the independence: identities persist, whatever the reforms may be; • and finally, co-structuring: reforms partly modify identities, but the latter also shape the reforms process. The position we are adopting in this paper tends to fit into this third approach, resulting from empirical data collected within a Belgian Ministry: the introduction of an NPM reform leads to a hybridization of identity logics within a public administration, but in other respects, the reform process can eventually be influenced by the identity logics. Using a qualitative analysis of our empirical material, we first distinguished 6 identity profiles, characterised by their reference to an identity logic (public service, public managerialism or pragmatism) and their perception of the context (congruence or dissonance). This identity profile concept can be defined as the enactment of the context according to each logic. In other words, the confrontation of the identity logic with the perception of the context can lead to either a situation of congruence (in which the perception of the context appears to be in continuity with the identity logic) or a situation of dissonance (in which there is a break between the perception of the context and the identity logic). The position towards the context, leading to either congruence or dissonance, depends on both individual and group factors. In order to give these profiles a longitudinal dimension and to propose an analysis of identity dynamics in a temporal perspective, we then conducted a second set of interviews 12 to 18 months later, with the same sample of people we had met before. In this way, we can explain how identity profiles evolve over time. A concomitant analysis of the administration context and the identity changes allows us to reveal the links between identities and the continuous change context into which they fit. Through our case study, our hypothesis of organizational identities and reform process co-structuring appears to be valid, as shown by the hybridization of identity logics within the administration we studied. Our results allow us to assume a modification of identity points of reference following a reform, as well as a reinterpretation of this reform through the identity filter. Our longitudinal approach reveals the identity dynamics, by identifying notably the shift processes from one position to another, and leads us to propose a model of contextualized identity dynamics. From our data, we are also able to show which factors produce (or are likely to produce) identity shifts. These evolution factors are the situational events which, when they occur, entail an evolution in the perception of the context perception of either congruence or dissonance), and can lead to a transition from one identity profile to another. We also consider the frame of mind of each identity profile towards change (1) as it is actually experienced and (2) in a projective way, as it would be experienced in future (i.e. the dimensions people wish to be changed, and those they fear being changed). Such information results in several lessons for managerial consideration: it can be used as a basis to extract precious indicators for change management – on the content of change as well as how it is conducted. These observations can also be used to identify the change potential of an organisation, in the design of change management strategies, and particularly in terms of communication policies. [less ▲]

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See detailBelgium : Characteristics of International Administration in Crisis Area
Candela Soriano, Mercedes; Brunet, Sébastien ULg

in Korhonen, Outi (Ed.) International Administration of Crisis Area : Nine National Approaches (2007)

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See detailAmortissement visqueux à utiliser pour un dimensionnement direct basé sur les déplacements
Degée, Hervé ULg; Bento, R.; Massena, B.

in Actes du 7ème colloque de l'AFPS (2007)

It is generally stated that an accurate evaluation of the equivalent viscous damping is a crucial step in the Direct Displacement-Based Design (DDBD) methodology. In such a context, the main objective of ... [more ▼]

It is generally stated that an accurate evaluation of the equivalent viscous damping is a crucial step in the Direct Displacement-Based Design (DDBD) methodology. In such a context, the main objective of the present contribution is to assess and compare different existing equations aiming at evaluating the equivalent damping and to provide information of the practical consequences of choosing one or another of these equations in the design process. [less ▲]

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See detailEffects of localized fires on concrete slabs
Franssen, Jean-Marc ULg; Dotreppe, Jean-Claude ULg

in Toutlemonde, F. (Ed.) Proceedings of CONSEC'07 (2007)

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See detailMaximum-likelihood Based Range-dependence Compensation for Coherent Multistatic STAP-based Radar
Neyt, Xavier; Acheroy, Marc; Verly, Jacques ULg

Conference (2007)

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See detailThe Belgian guidelines for management of low back pain in occupational health
Mairiaux, Philippe ULg; Mazina, D. ULg

Poster (2007)

Aims As part of the promotion of a national strategy for the prevention and the management of acute and chronic low back pain (CLBP), the Belgian Health Care Knowledge Centre (KCE) funded a systematic ... [more ▼]

Aims As part of the promotion of a national strategy for the prevention and the management of acute and chronic low back pain (CLBP), the Belgian Health Care Knowledge Centre (KCE) funded a systematic review of the EBM literature concerning the management of LBP patients in the occupational health (OH) context. Taking account differences in regulations and practices within the health care system between EU countries1,2, this review aimed at issuing good practices recommendations applicable to the Belgian situation to prevent the transition from acute to chronic back pain and to avoid long duration absences from work. Methods The guidelines have been developed in three steps. First, an electronic search was performed for relevant guidelines and systematic reviews (SR) on the following databases: EMBASE, Medline, Cochrane Controlled Trials Register, NHS guidelines Finder, National Guidelines Clearing House, New Zealand Guidelines Group Search and Pedro database. The search strategy combined 3 groups of terms: low back pain, occupational medicine and the type of reference (practice guideline or SR). The identified guidelines were appraised using the AGREE method, while SR’s were appraised using the Cochrane Collaboration grid. In a second phase, the draft guidelines were submitted to a group of OH academics from the main Belgian universities. The revised version of the guidelines was then published in English in the KCE report 3. In a third step currently under way, the guidelines are adapted in a more practical format for facilitating their daily use by OH practitioners. This involves a working group of OH practitioners coming from 12 external prevention services and several large company OH services. The document will also be discussed with representatives of other health professionals (GP’s and medical advisors of the sickness funds). Results Scientific evidence from the 7 selected guidelines and from the 27 SR’s was organized according to the main missions of the occupational physician (OP) and medical adviser (MA). Which background information should be given to employers and employees when the OP is playing an adviser role? What evidence-based prevention policies (primary and secondary) should he/she promote in the enterprises? For the third mission of the OP, health surveillance of workers, the document considers three situations: periodic health surveillance, spontaneous examinations at the worker request, and return to work (RTW) examinations for workers absent for 28 days or more. The main conclusions are summarized in 4 tables under the format of key-points, each of those mentioning the quality of the evidence (using the Guyatt classification). Discussion and conclusions The key message for prevention of CLBP is the need for staying active and minimizing the time out of work. Evidence of high quality is in favor of a multidisciplinary approach using conservative treatments. One challenge is to avoid hospitalizations and especially surgery in CLBP patients. Those recommendations are relevant for all care settings, including the occupational environment. From a health care policy point of view, the project highlighted the major roles of the occupational physician and of the medical adviser and stressed the need to better define those roles if decision makers want to tackle the low back pain problem and the economic consequences of the related sick leave. References 1. Dutch Association of Occupational Medicine (NVAB). Management of low back workers by the occupational physician. Approved guidelines ; April 1999. 2. RCM-FOM. Occupational health guidelines for management of low back pain at work: Evidence Review and Recommendations. London, 2000. 3. Nielens H., Van Zundert J., Mairiaux P., Gailly J., Van Den Hecke N., Mazina D., Camberlin C., Bartholomeeussen S., De Gauquier K., Paulus D., Ramaekers D. Chronic Low Back Pain. Good Clinical Practice (GCP). Brussels: Belgian Health Care Knowledge Centre (KCE); 2006. KCE reports 48B (D/2006/10.273/64). [less ▲]

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See detailThe slow-flow method of identification in nonlinear structural dynamics
Kerschen, Gaëtan ULg; Vakakis, Alexander F.; Lee, Young.S et al

in Smart Str. and Mat. & Nondestructive Eval. and Health Mon., San Diego, 2007 (2007)

The Hilbert-Huang transform (HHT) has been shown to be effective for characterizing a wide range of nonstationary signals in terms of elemental components through what has been called the empirical mode ... [more ▼]

The Hilbert-Huang transform (HHT) has been shown to be effective for characterizing a wide range of nonstationary signals in terms of elemental components through what has been called the empirical mode decomposition. The HHT has been utilized extensively despite the absence of a serious analytical foundation, as it provides a concise basis for the analysis of strongly nonlinear systems. In this paper, we attempt to provide the missing link, showing the relationship between the EMD and the slow-flow equations of the system. The slow-flow model is established by performing a partition between slow and fast dynamics using the complexification-averaging technique, and a dynamical system described by slowly-varying amplitudes and phases is obtained. These variables can also be extracted directly from the experimental measurements using the Hilbert transform coupled with the EMD. The comparison between the experimental and analytical results forms the basis of a nonlinear system identification method, termed the slow-flowmodel identification method, which is demonstrated using numerical examples. [less ▲]

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See detailEffect of cyclodextrin derivatives on bronchial epithelial cell layer permeability
Belhadj-Salem, Leila; Bosquillon, Cynthia; Delattre, Luc ULg et al

Poster (2007)

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See detailPhysiological consequences of strenuous concentric and eccentric isokinetic exercises
Croisier, Jean-Louis ULg; Maquet, Didier ULg; Lehance, Cédric ULg et al

in Isokinetics & Exercise Science (2007), 15(1), 51

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See detailLa gestion informatisée des compétences (GIC), un support du développement professionnel en enseignement supérieur.
Georges, François ULg

in Vers un changement de culture en enseignement supérieur. Regards sur l'innovation, la collaboration etla valorisation. (2007)

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See detailRole of beta 2-receptors in the anti-inflammatory effects of formoterol in rats with cadmium-induced acute pulmonary inflammation
Zhang, W.; Zhang, F.; Fievez, Laurence ULg et al

in Proceedings: Autumn Meeting of the Belgian Society of Fundamental and Clinical Physiology and Pharmacology (2007)

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See detailDétection de QTL influençant l’aptitude à la transformation fromagère des laits dans un croisement Holstein Normande
Larroque, H.; Gallard, Y.; Delacroix-Buchet, A. et al

in Renc. Rech. Ruminants, 2007, 14 (2007)

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See detailDendritic cells genetically engineered to express IL-10 induce long-lasting antigen-specific tolerance in experimental asthma
Henry, E.; Desmet, C. J.; Garzé, V. et al

Poster (2007)

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See detailMémoire de travail et vieillissement normal
Collette, Fabienne ULg

in Aubin, Ghislaine; Coyette, Françoise; Pradat-Diehl, P (Eds.) et al Neuropsychologie de la mémoire de travail (2007)

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See detailRegulation by androgens of the expression of the EGF receptor family members in prostate cancer cells
Pignon, Jean-Christophe; Delacroix, Laurence; Nolens, Grégory et al

Conference (2007)

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See detailEffects of formoterol on repeated cadmium inhalation-induced lung inflammation and emphysema in rats
Zhang, W.; Fievez, Laurence ULg; Cheu, Esteban ULg et al

in Proceedings : Congrès de physiologie, de pharmacologie et de thérapeutique P2T (2007)

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See detailEffect of cyclodextrins on the viability of endothelial cells
Castagne, Delphine ULg; Belhadj Salem, Leila; Delattre, Luc ULg et al

in Journal of Inclusion Phenomena and Macrocyclic Chemistry (2007), 57(1-4), 105-107

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See detailDevelopment of urine-based DNA methylation assay for prostate cancer screening
Vener, T. I.; Derecho, C.; Varde, S. et al

Poster (2007)

Introduction: The best outcome for patients with prostate cancer (PCa) is seen for those treated at an early stage of the disease. A digital rectal examination (DRE) and the measurement of serum prostate ... [more ▼]

Introduction: The best outcome for patients with prostate cancer (PCa) is seen for those treated at an early stage of the disease. A digital rectal examination (DRE) and the measurement of serum prostate specific antigen (PSA) levels are the current standards for PCa early detection. However, serum PSA testing lacks both sensitivity and specificity, and core biopsies frequently fail to identify small foci of PCa. The availability of non-invasive diagnostic molecular tests that could allow for a more precise identification of malignant prostate cells in asymptomatic men would be of great clinical value to improve PCa diagnosis. Study design: 114 men scheduled to undergo a prostate biopsy were enrolled in the study. The biopsies were triggered either by an abnormally high PSA value or by suspicious findings on DRE. Patients with other known or suspected urinary malignancy were excluded from the study. Morning, post-prostate massage and post-biopsy urine samples were collected from all individuals. The main goals of this study were a) to determine if prostate massage can improve the prostate DNA quantity compared to urine collected in the morning or after biopsy, and b) to evaluate the methylation status of a gene panel in urine samples from subjects with cancer found in prostate biopsy tissue cores versus subjects without cancer. Methods: Gene promoter methylation is associated with prostate cancer and has been successfully used for the molecular detection of neoplasia in urine. We have developed real-time methylation specific PCR assays to define the methylation status of several genes. Results: Median age of the patients was 65 years (range 48-85). PCa was found in 51% of the patients. Histological diagnosis of the biopsies was compared to methylation results in urine from 102 samples (89% success rate due low DNA yields for 12 samples). The comparison between different urine sampling techniques showed that prostate massage is needed. The best results were obtained in post massage urine samples with a combination of GSTP1, p14, p16, RARβ2 and RASSF1A resulting in a sensitivity of 74% and a specificity of 75%. Future: A multiplex assay using the Cepheid SmartCycler™ II platform is under development. Further studies are in progress to validate the assay across multiple centers. [less ▲]

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See detailStudy of the flavonoids effect on the AhR-dependent transcription using reporter gene assays
Van Der Heiden, Edwige ULg; Bechoux, Nathalie ULg; Sergent, Thérèse et al

in Journal of Biotechnology (2007), 131(2, Suppl. S), 6

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See detailAn unusual cell type of the auditory organ during neonatal development: the inner pillar cells
Thelen, Nicolas ULg; Breuskin, I; Malgrange, B et al

Poster (2007)

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See detailWhole body vibration in the treatment of fibromyalgia: Influence on muscle performances
Maquet, Didier ULg; Helene, Loic; Demoulin, Christophe ULg et al

in Isokinetics & Exercise Science (2007), 15

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See detailDevelopment of an original intra-uterine implant allowed specific release kinetics of several drugs
Nizet, Dominique; Zalfen, Alina; Collard, Laurence ULg et al

Poster (2007)

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See detailThe cross-entropy method for power system combinatorial optimization problems
Ernst, Damien ULg; Glavic, Mevludin; Stan, Guy-Bart et al

in Proceedings of the 2007 Power Tech (2007)

We present an application of a cross-entropy based combinatorial optimization method for solving some unit commitment problems. We report simulation results and analyze, under several perspectives ... [more ▼]

We present an application of a cross-entropy based combinatorial optimization method for solving some unit commitment problems. We report simulation results and analyze, under several perspectives (accuracy, computing times, ability to solve efficiently large-scale problems), the performances of the approach. [less ▲]

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See detailCarbon dioxide in European coastal waters
Borges, Alberto ULg; Schiettecatte, L.-S.; Abril, G. et al

Poster (2007)

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See detailStudy of the role of histone deacetylases in myofibroblastic differenciation
Glénisson, Wendy; Waltregny, David ULg; Castronovo, Vincenzo ULg

Conference (2007)

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See detailThermomechanical one-phase modeling of semi-solid thixoforming
Koeune, Roxane ULg; Ponthot, Jean-Philippe ULg

in Int. Conf. on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2007 (2007)

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See detailThe role of CRP on neonatal hypoxic-ischemic encephalopathy
Kinugasa, Yukiko; Mimura, Kazuya; Katayama, Miho et al

Poster (2007)

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See detailNonexponential decay of Bose-Einstein condensates: a numerical study based on the complex scaling method
Schlagheck, Peter ULg; Wimberger, S.

in Applied Physics B : Lasers & Optics (2007), 86(3), 385-390

We study the decay dynamics of an interacting Bose-Einstein condensate in the presence of a metastable trapping potential from which the condensate can escape via tunneling through finite barriers. The ... [more ▼]

We study the decay dynamics of an interacting Bose-Einstein condensate in the presence of a metastable trapping potential from which the condensate can escape via tunneling through finite barriers. The time-dependent decay process is reproduced by means of the instantaneous decay rates of the condensate at a given population of the quasi-bound state, which are calculated with the method of complex scaling. Both for the case of a double-barrier potential as well as for the case of a tilted periodic potential, we find pronounced deviations from a monoexponential decay behavior, which would generally be expected in the absence of the atom-atom interaction. [less ▲]

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See detailEtudes sédimentologiques dans les cours d’eau à moules perlières en Ardenne
Mols, J.; Defechereux, O.; Petit, François ULg et al

in Rencontres nationales techniques, gestion des ruisseaux de têtes de bassin set zones humides associées (2007)

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See detailOpera latina : le nouveau site Internet du LASLA
Denooz, Joseph ULg

in Citti, Francesco; dell Vecchio, Tommaso (Eds.) Proceedings of the Colloquium (2007)

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See detailLocal Second Gradient Models and Damage Mechanics: 1D Post-Localization Studies in Concrete Specimens
Kotronis, Panagiotis; Collin, Frédéric ULg; Bésuelle, Pierre et al

in Exadaktylos, G.; Vardoulakis, Ioannis (Eds.) Bifurcations, Instabilities, Degradation in Geomechanics (2007)

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See detailInfluence of thermal treatment on YBa2Cu3O7-x thick films prepared by electrophoretic deposition on Ni and Ag substrates
Dusoulier, Laurent; Denis, Samuel; Dirickx, Michel et al

in Materials Research Society Symposium Proceedings (2007), 1001E

We have studied the sintering parameters of YBa2Cu3O7-x (YBCO) coatings produced by electrophoretic deposition (EPD) on Ag and Ni substrates. The maximal sintering temperature is ~ 930°C due to partial ... [more ▼]

We have studied the sintering parameters of YBa2Cu3O7-x (YBCO) coatings produced by electrophoretic deposition (EPD) on Ag and Ni substrates. The maximal sintering temperature is ~ 930°C due to partial melting and chemical contamination for Ag and Ni substrates respectively. Increasing the sintering duration does not improve significantly the densification. When Ar sintering atmosphere is used, the coating density is strongly increased on Ag substrates while adhesion is poor on Ni substrates. The Ar-sintered YBCO coating deposited on planar Ag substrate displays a significant magnetic shielding effect for low frequency applied magnetic induction. [less ▲]

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See detailContribution of dendrochronology to the study of droughts in northwestern France (late XIX-XXth century)
Planchon, Olivier; Dubreuil, Vincent; Bernard, Vincent et al

in Geophysical Research Abstracts (2007)

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See detailNew Colliding-Wind Massive Binaries
De Becker, Michaël ULg; Rauw, Grégor ULg

in Massive Stars in Interactive Binaries (2007)

We report on the recent discovery of two new massive binary systems: WR20a and CygOB2#8A. For both systems, we briefly present the orbital solutions and we discuss the strong phase-locked line profile ... [more ▼]

We report on the recent discovery of two new massive binary systems: WR20a and CygOB2#8A. For both systems, we briefly present the orbital solutions and we discuss the strong phase-locked line profile variability of the Halpha and HeII lambda 4686 lines for WR20a, and the HeII &; 4686 line in the case of CygOB2#8A. In both cases, we show that the profile variability reveals the signature of a wind interaction. The prospects for future high-energy observations are also discussed. [less ▲]

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See detailGESTION DU RISQUE LORS DU TRANSFERT DE METHODES ANALYTIQUES – CAS D’UNE METHODE BIOANALYTIQUE
Rozet, Eric ULg; Dewe, W.; Morello, R. et al

Conference (2007)

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See detailLEODIUM project and student space activities at the University of Liege
Vandenrijt, Jean-François ULg; Rochus, Pierre ULg; Kerschen, Gaëtan ULg et al

Conference (2007)

the origin of the LEODIUM project which stands for Low Earth Orbit Demonstration of Innovations in University Mode. This project aims to create student pico- or nano-satellites. There is a strong ... [more ▼]

the origin of the LEODIUM project which stands for Low Earth Orbit Demonstration of Innovations in University Mode. This project aims to create student pico- or nano-satellites. There is a strong motivation coming from the students and from the academic members to promote space. Being unexperienced in complete satellite design, as a first step in this direction, we started working with the ESA funded SSETI association. At the moment, two teams of students are working on SSETI satellites. One is working as the MECH team which is in charge of the design of the sun-pointing solar panels of the European Student Earth Orbiter (ESEO) satellite mechanisms, the other team is working on the phase-A studies of the Narrow Angle Camera (NAC) which will be the core payload of the European Student Moon Orbiter (ESMO) satellite, both in collaboration with local industrials. The students are mainly working on ESEO and ESMO as part of their master thesis. In addition to that, two PhD students are in charge of the coordination of the teams (one for the ESEO team and another for the ESMO team). They will also be the link between previous and new students every times an overlap will occur and ensure that information is not lost during the transition. In this paper, we will describe the current design and the achievements on the ESEO solar panels and the ESMO NAC camera. Explanation will also be given on how the collaboration between the local student and the SSETI association is managed. Finally, we will briefly introduce the prospective for the LEODIUM project. [less ▲]

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See detailMicro and macro investigation on the hardening of a titanium alloy
Lelotte, Thomas; Rossi, Barbara ULg; Habraken, Anne ULg

in 11th World conference on titanium: Ti 2007, Kyoto 3-7 June 2007 (2007)

This paper presents the experimental and numerical tests made on the Titanium based alloy Ti6A14V to identify its yield locus and the hardening behaviour. A bi-axial experimental equipment has been used ... [more ▼]

This paper presents the experimental and numerical tests made on the Titanium based alloy Ti6A14V to identify its yield locus and the hardening behaviour. A bi-axial experimental equipment has been used to perform cyclic shear tests, simple shear tests and successive simple shear tests and plane-strain tests. Coupled with classical tensile tests, these tests enable to identify the yield locus and the hardening model. Teodosiu and Hu’s hardening law and isotropic Swift type hardening and kinematic Armstrong Frederick hardening models have been investigated. [less ▲]

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See detailCreation of Dicke States in Distant Qubits with Linear Optics
Thiel, C.; von Zanthier, J.; Bastin, Thierry ULg et al

Conference (2007)

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See detailHierarchically nanostructured porous functional ceramics
Vantomme, A.; Léonard, Alexandre ULg; Yuan, Z.-Y. et al

in Key Engineering Materials [=KEM] (2007), 336-338 III

We demonstrate here a self-formation phenomenon of hierarchy with multiple-scaled porosity. Macrochanneled structures, labelled as CMI-7, with openings ranging from 0.5 to 5.0 microns and wormhole-like ... [more ▼]

We demonstrate here a self-formation phenomenon of hierarchy with multiple-scaled porosity. Macrochanneled structures, labelled as CMI-7, with openings ranging from 0.5 to 5.0 microns and wormhole-like mesoporous walls with various ceramic compositions, such as ZrO2, TiO2, Al 2O3, Y2O3, ZrO2-SiO 2, ZrO2-Tio2, ZrO2-Y 2O3,..., aluminosilicates, aluminophosphates, silicoaluminophosphates, metallophosphates, can be prepared by just controlling the hydrolysis and polycondensation rates of the pre-selected ceramic sources. The macrochannels (funnel-like or straight) are well parallel each other and perpendicular to the tangent of the particles' surface. These hierarchical porous ceramics can be used in catalysis, separation and for immobilization of biological molecules and even microorganisms for filtration and bioreactor applications. [less ▲]

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See detailPractical Computation of Nonlinear Normal Modes Using Numerical Continuation Techniques
Peeters, Maxime ULg; Viguié, Régis ULg; Kerschen, Gaëtan ULg et al

in International Workshop: Advancements in Design Optimization of Materials, Structures and Mechanical Systems, Xi'An, 2007 (2007)

The concept of nonlinear normal modes (NNMs) is considered in the present paper. One reason of the still limited use of NNMs in structural dynamics is that their computation is often regarded as ... [more ▼]

The concept of nonlinear normal modes (NNMs) is considered in the present paper. One reason of the still limited use of NNMs in structural dynamics is that their computation is often regarded as impractical. However, when resorting to numerical algorithms, we show that the NNM computation is possible with limited implementation effort, which paves the way to a practical method for determining the NNMs of nonlinear mechanical systems. The proposed algorithm relies on two main techniques, namely a shooting procedure and a method for the continuation of NNM motions. The algorithm is demonstrated using two different mechanical systems, a nonlinear two-degree-of-freedom system and a nonlinear cantilever beam discretized by the finite element method. [less ▲]

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See detailEvaluation des biais d'échantillonnage dans les analyses des régressions/extensions dans les Atlas de répartition.
Dufrêne, Marc ULg

in Actes du Colloque « Cartographie de la flore, de la végétation et des milieux » (2007)

Les Atlas de répartition ont pour premier objectif de faire un bilan de la répartition des espèces d’un groupe biologique à un moment donné en cartographiant la localisation des populations dans des ... [more ▼]

Les Atlas de répartition ont pour premier objectif de faire un bilan de la répartition des espèces d’un groupe biologique à un moment donné en cartographiant la localisation des populations dans des mailles géographiques plus ou moins précises. Lorsque de telles synthèses sont réalisées à deux périodes différentes, la tentation est forte de comparer les évolutions des répartition des espèces d’un atlas à l’autre pour évaluer leur évolution (régression, stabilité, extension). Les Atlas sont d’ailleurs un des supports essentiels de la réalisation des listes rouges d’espèces menacées qui sont des outils importants pour identifier les priorités en matière de gestion et de conservation de la biodiversité. De telles comparaisons dans le temps sont faciles lorsqu’on dispose de jeux de données récoltées avec des protocoles similaires et la même intensité d’échantillonnage locale et régionale. Hors, les Atlas sont, par nature, des ensembles hétérogènes de données récoltées de manière différente à chaque période, avec de nombreux collaborateurs qui inventorient des zones de travail de manière indépendante et avec des techniques plus ou moins spécifique. Les méthodes d’investigation ont aussi bien évolué d’une période à l’autre. Les Atlas ont souvent été critiqué pour leur caractère hétérogène mais cette hétérogénéité est aussi défendue par d’autres comme un avantage car assimilée à un échantillonnage aléatoire. Il est évident qu’ils recèlent de l’information sur les tendances, mais il faut être prudent pour mettre les mettre en évidence. Cette contribution a pour but de montrer avec différents exemples tirés de l’analyse de données de répartition de différents groupes biologiques les caractéristiques majeures des échantillonnages de données biologiques dans de grandes régions. On résumera les méthodes existantes et on proposera quelques pistes simples à prendre en compte lors de l’analyse des tendances sur de telles données pour comparer des échantillonnages réalisés à des périodes différentes. On montrera comment évaluer de manière simple l’exhaustivité de l’échantillonnage avec la distribution de fréquence du nombre d’espèces par maille et la relation généralement étroite qui existe entre l’intensité de l’échantillonnage et le nombre d’espèces. On vérifiera notamment si des hypothèses comme le fait que toutes les espèces sont échantillonnées de la même manière ou que l’ensemble du groupe peut être considéré comme stable dans le temps sont validées. On montrera aussi comment évaluer la répartition des différences d’échantillonnage dans le temps et l’impact que cela peut avoir sur les hypothèses de base des tests habituels. On montrera les différences observées en fonction des choix effectués et la difficulté de démontrer des régressions lorsque des échantillonnages récents sont bien plus exhaustifs que les échantillonnages anciens. On insistera sur la nécessité de disposer de données anciennes précises et détaillées et sur l’intérêt de disposer d’un nombre suffisant de mailles échantillonnées de manière relativement similaire dans le temps pour faire des comparaisons correctes. [less ▲]

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See detailCurcumin inhibits interleukin-6, -8, nitric oxide and prostaglandin E2 synthesis by bovine chondrocytes
Mathy, Marianne ULg; Sanchez, Christelle ULg; Priem, F. et al

in Osteoarthritis and Cartilage (2007), 15(Suppl C), 115

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See detailMettre les sources à la disposition du public : l'exemple des Dossiers Pédagogiques Gallia Belgica
Longrée, Dominique ULg; Bauzier, Carine

in Breyer, Catherine; et alii (Eds.) Actes des VIIe Congrès de l'Association des Cercles francophones d'Histoire et d'Archéologie de Belgique et LIVe Congrès de la Fédération des Cercles d'Archéologie et d'Histoire de Belgique, Congrès d'Ottignies - Louvain-la-Neuve, 26, 27 et 28 aôut 2004 (2007)

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See detailSpring CO2 dynamics within sea ice: abiotical versus biological control.
Delille, Bruno ULg; Schoemann, Véronique; Becquevort, Sylvie et al

Poster (2007)

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See detailSensitivity analysis of the peak outflow induced by the breaching of embankment dams
Dewals, Benjamin ULg; Archambeau, Pierre ULg; Erpicum, Sébastien ULg et al

in Rutschmann, Peter (Ed.) Berichte des Lehrstuhls und der Versuchanstalt für Wasserbau und Wasserwirtschaft (2007)

Accurately predicting the flow induced by the collapse of embankment dams remains challenging, as a consequence of the level of uncertainty affecting the prediction of breach width and formation time ... [more ▼]

Accurately predicting the flow induced by the collapse of embankment dams remains challenging, as a consequence of the level of uncertainty affecting the prediction of breach width and formation time. Moreover, very few systematic analyses are available today concerning the sensitivity of the flow with respect to those uncertainties. The present theoretical analysis quantifies the influence of variations in the breach parameters on the peak outflow. [less ▲]

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See detailLa photographie diagnostic de la contemporanéité
Dondero, Maria Giulia ULg

in Association Française de Sémiotique (2007)

immigration, Cet article porte sur l’efficacité politique d’une série photographique qui problématise des questions socioculturelles contemporaines telles l’immigration, l’exploitation et l’éthique du ... [more ▼]

immigration, Cet article porte sur l’efficacité politique d’une série photographique qui problématise des questions socioculturelles contemporaines telles l’immigration, l’exploitation et l’éthique du travail. L’image photographique devient une ressource dans les mains des acteurs sociaux et fait fonction de diagnostic des tensions du contemporain. La photographie permet de « reconnaître à travers » (c’est-à-dire « diagnostiquer ») et de formuler des jugements. Le potentiel sémantique du diagnostic engendré par cette série et la force illocutoire des jugements qui y sont inscrits fonctionnent comme une sorte d’« argumentation par images ». L’analyse de cette série photographique, réalisée par le photographe et théoricien Allan Sekula, nous a amené à nous interroger sur la relation entre image, corpus, genres d’afférence et statuts (documentaire et artistique). [less ▲]

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See detailSolidarity Economy and Praxis Imaginary in the Anti-Globa Movement
Frère, Bruno ULg

Conference (2007)

This paper presents a phenomenological reading of Pragmatist sociology, which allows to investigate the internal dynamics and tensions within the économie solidaire (ES) movement. While the movement's ... [more ▼]

This paper presents a phenomenological reading of Pragmatist sociology, which allows to investigate the internal dynamics and tensions within the économie solidaire (ES) movement. While the movement's identity is defined by a common imagnary of action, conflicting views on how to realise the joint vision of a "ES" subvert the formation of a coherent and more powerful voice. The imaginary of practice contrasts with the imaginary of utopia and contestation that characterised the "old" social movements, like the Marxist-Leninist labour movements, which originated in the classical left ideology (Touraine, 2002). But even if the collective representations of these groups take their starting point in a common political imaginary of practice (Castoriadis, 1975), some internal criticisms appears. The reason is that this imaginary of practice is articulated by four distinctive states of mind organized around four values. To below to the SE, each association/cooperative must be able to travel between these states of mind and to represent its specific action as a realisation of the four values. When it doesn't, it takes the risk to receive criticisms from other SE actorsd. In a second move, I'll give a example of a very concentration around one specific state of mind that I call “extrapolation” and that leads to fights. I explore how the "Mouvement pour l'Economie Solidaire" (MES) position itself within the anti-globalisation movement by using arguments drawn from the common imaginary In the various World Social Forums (Porto Alegre, Bombay) or European Social Forums (Florence, Paris, London), the MES present themselves as the practical actors of concrete, material and realistic claims while they criticise the political grammar of the alter globalisation movements, such as the French radical left movement (composed by political parties and trade unions). But these forum are mainly the space of fights between the MES actors themselves and other “representative” association of the ES : Les Pénélopes. Each of them accuse the other to forget some of the four fundamental values to focus about one of them that they extrapolate. Rather than trying to reconcile the four states of mind and ideological representation of the ES, the different groups are resilient to compromise their position. Could some compromises allow them to reach a better political visibility in France? [less ▲]

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See detailDétermination et cartographie des micro-habitats lotiques : Une approche géomorphologique
Hallot, Eric ULg; Houbrechts, Geoffrey ULg; Verniers, Gisèles et al

Poster (2007)

Lors du suivi d’aménagement ou de restauration de cours d’eau, l’analyse des micro-habitats s’avère un élément important. Leur caractérisation et leur quantification permet la comparaison avec d’autres ... [more ▼]

Lors du suivi d’aménagement ou de restauration de cours d’eau, l’analyse des micro-habitats s’avère un élément important. Leur caractérisation et leur quantification permet la comparaison avec d’autres sites témoins et de suivre leur évolution dans le temps. Une carte des micro-habitats est indispensable à la compréhension d’indices biologiques en établissant notamment une relation entre la diversification du milieu (donc des micros-habitats) et la diversité des macro-invertébrés benthiques. Cette cartographie est obtenue en croisant, grâce à un logiciel SIG, deux couches d’information, la bathymétrie et le substrat. La bathymétrie est obtenue par soustraction du MNT du fond du lit et du MNA du plan d’eau à l’étiage. Le substrat est obtenu par observation de terrain en utilisant une clé de détermination basée sur les grandes classes granulométriques du substrat et la granulométrie des éléments intercalaires. Ces deux couches d’information sont ensuite discrétisées chacune en 4 classes principales afin d’obtenir 16 types théoriques pour lesquels la superficie et la répartition peuvent être étudiés à partir d’outils SIG classiques. La méthode proposée, bien qu’aisée à mettre en œuvre, nécessite cependant une certaine expertise notamment lors de la détermination des classes du substrat. La précision du MNT du fond du lit définira quant à elle, la précision finale de la carte. Nous présentons ici deux exemples. Le premier, réalisé sur l’Ourthe Occidentale à Moircy, a permis la comparaison entre un site réaménagé et un site témoin. Le second, sur la Semois Lorraine à Sivry, a été effectué afin d’étudier l’évolution de la recolonisation par les macro- invertébrés benthiques d’un secteur réaménagé mais également de définir très précisément l’emplacement de leur échantillonnage afin d’assurer une répartition la plus représentative possible. [less ▲]

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See detailBenefits of an out-patient multidisciplinary rehabilitation program in the treatment of chronic low back pain
Vanderthommen, Marc ULg; Demoulin, Christophe ULg; GROSDENT, Stéphanie ULg et al

in Abstract book of 6th Interdisciplinary World Congress on Low Back & Pelvic Pain (2007)

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See detailHis Horses are like Falcons: War Imagery in Ramesside Texts
Gillen, Todd Jonathan ULg

in Endreffy, Kata; Gulyas, Andras (Eds.) Proceedings of the Fourth Central European Conference of Young Egyptologists (2007)

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See detailNeonatal screening of hemoglobinopathies on dried blood
BOEMER, François ULg

Conference (2007)

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See detailThe XMM-LSS Survey : properties and two-point angular correlations of point-like sources
Garcet, O.; Gandhi, P.; Disseau, L. et al

Poster (2007)

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See detailSperm quality and cryopreservation in Perca fluviatilis
Linhart, Ottomar; Alavi Hadi, S. M.; Rodina, M. et al

Conference (2007)

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See detailA moving listener in a virtual audio environment with particularly irregular reverberation decay
Embrechts, Jean-Jacques ULg; Lesoinne, Stéphane ULg; Werner, Nicolas

in Proceedings of the 28th Symposium on Information Theory in the Benelux (2007)

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See detailVascular architecture of breast cancer xenographs over-expressing MT4-MMP
Chabottaux, V; Thiry, Marc ULg; Alvarez Gonzalez, M-L et al

Poster (2007)

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See detailPrevalence of cardiovascular risk factors in young adults studying for their first year at the University of Liège
Krzesinski, Jean-Marie ULg; Graceffa, Maria Antonietta ULg; Focan, Michèle ULg et al

in Acta Clinica Belgica (2007), 62(5), 384

The prevalence of cardiovascular risk factors (RF) is not well known in young students. The present study would like to partially fill this gap with the idea to propose an educational program for ... [more ▼]

The prevalence of cardiovascular risk factors (RF) is not well known in young students. The present study would like to partially fill this gap with the idea to propose an educational program for improvement of these risk factors by diet and lifestyle modifications in the near future during the following years of their studies. [less ▲]

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See detailAnalyse de l’évolution des plaines alluviales du massif ardennais grâce aux résidus de la sidérurgie ancienne
Houbrechts, Geoffrey ULg; Mols, Julien; Petit, François ULg

Poster (2007)

Dès la fin du XIVe siècle, des sidérurgistes installèrent leurs fourneaux et leurs affineries le long des cours d’eau du massif ardennais afin d’utiliser l’énergie hydraulique pour actionner les soufflets ... [more ▼]

Dès la fin du XIVe siècle, des sidérurgistes installèrent leurs fourneaux et leurs affineries le long des cours d’eau du massif ardennais afin d’utiliser l’énergie hydraulique pour actionner les soufflets et les marteaux des forges. De grandes quantités de scories, résidus de la sidérurgie ancienne, étaient produites lors de la transformation du minerai de fer en métal et étaient ensuite entassées à proximité des bâtiments, généralement sur les plaines alluviales. Ces éléments pouvaient donc être emportés par les crues débordantes ou par érosion des crassiers, se mélanger aux alluvions naturelles et se déposer en aval. Grâce aux études historiques, il est possible de dater de manière relativement précise les périodes de fonctionnement des différents sites sidérurgiques dans une vallée. Nous avons donc développé une méthode qui consiste à utiliser les concentrations en scories sidérurgiques comme traceur pour dater les dépôts fluviatiles, enfouis et conservés dans les plaines alluviales. Pour plusieurs rivières du massif ardennais, nous avons déterminé des taux de sédimentation moyens pour les derniers siècles et nous avons quantifié l’importance de la mobilité latérale des cours d’eau. Ces données sont particulièrement rares étant donné l’imprécision des cartes anciennes et des méthodes de datation pour cette période. [less ▲]

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See detailNonlinear MDOF System Characterization and Identification using the Hilbert- Huang Transform: Experimental Demonstration
Kerschen, Gaëtan ULg; Vakakis, Alexander F.; Lee, Young.S et al

in 25th International Modal Analysis Conference, Orlando, 2007 (2007)

The Hilbert transform is one of the most successful approaches to tracking the varying nature of vibration of a large class of nonlinear systems, thanks to the extraction of backbone curves from ... [more ▼]

The Hilbert transform is one of the most successful approaches to tracking the varying nature of vibration of a large class of nonlinear systems, thanks to the extraction of backbone curves from experimental data. Because signals with multiple frequency components do not admit a well-behaved Hilbert transform, this transform is inherently limited to the analysis of single-degree-of-freedom systems; this shortcoming is potentially overcome by the Hilbert-Huang transform (HHT). In this study, the joint application of the complexification-averaging method and the HHT enables us to develop a new technique, the slow-flow model identification method. Through an experimental application, we demonstrate that the proposed method is adequate for characterizing and identifying multi-degreeof-freedom nonlinear systems. [less ▲]

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See detailSome considerations on Devonian miospore taxonomy
Breuer, P.; Filatoff, J.; Steemans, Philippe ULg

in Carnets de Géologie = Notebooks on Geology (2007), Mémoire 2007/01, CG2007 M01

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See detailGestion conservatoire du sol au Vietnam : cas d'études de gestion des sols dans la province de Thua Thien Hue
Pham, Quang Ha; Pham, Khanh Tu; Hoang, Thi Thai Hoa et al

in Agence Universitaire de la Francophonie (Ed.) Actes du colloque "1ères Journées Scientifiques Inter-Réseaux de l'AUF "Gestion intégrée des eaux et des sols : ressources, aménagements et risques en milieux ruraux et urbains" (2007)

Central Vietnam is composed of two contrasting topographic areas parallel to the coastline: mountains in the West and lowlands in the East where most of the population is concentrated. Sandy soils are ... [more ▼]

Central Vietnam is composed of two contrasting topographic areas parallel to the coastline: mountains in the West and lowlands in the East where most of the population is concentrated. Sandy soils are largely dominant in the cultivated area in this narrow strip along the sea. Typical constraints of these soils are chemical infertility and acidity, excessive drainage capacity, low organic matter content, associated with particular climate limitations: heavy rain, floods and droughts during certain periods. In the paper, we described a detailed survey among 145 households in villages from the 4 districts of the coastal area of the Thua Thien Hue Province. Existing practices and the socio-economic situation are evaluated and selected pilot farmers are involved in the research of optimal practices. Soil samples (300) and organic matter samples (95) are collected during this survey. The partners of the research include the Hue University of Agriculture and Forestry, the National Institute for Soils and Fertilizers in Vietnam, the Faculty of Agricultural Sciences of Gembloux, and the Catholic University of Louvain in Belgium. [less ▲]

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See detailMechanical constitutive framework for thermal effects on unsaturated soils.
François, Bertrand ULg; Nuth, Mathieu; Laloui, Lyesse

in Proceeding of the 10th Int. Symp. on Numerical Models in Geomechanics, NUMOG X (2007)

Research interest in the thermo-mechanical behaviour of unsaturated soils is growing as a result of an increasing number of geomechanical problems involving both thermal and suction effects. The ... [more ▼]

Research interest in the thermo-mechanical behaviour of unsaturated soils is growing as a result of an increasing number of geomechanical problems involving both thermal and suction effects. The underground waste disposal is one such critical problem. Until now, these two environmental loadings have often been considered independently. This paper proposes a new unified thermo-mechanical framework for unsaturated soils based on thermo-hydro-mechanical (THM) experimental evidence on cohesive soils. The Bishop effective stress framework is adopted to represent the stress state in the soil in a unified fashion. This constitutive context based on the evolution of two key parameters (the preconsolidation pressure and the suction air-entry value) makes it possible to represent the main features of the thermo-mechanical behaviour of unsaturated soils. [less ▲]

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See detailRestrictive annuloplasty for ischemic mitral regurgitation may induce functional mitral stenosis.
Magne, Julien ULg; Sénéchal, M; Mathieu, P et al

Conference (2007)

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See detailLa numérisation des Archives Photographiques de Papyrologie Littéraire du CEDOPAL
Marganne, Marie-Hélène ULg

in Frosen, J.; Purola, T.; Salmenkivi, E. (Eds.) Proceedings of the 24. Congress of Papyrology. Helsinki, 1-7 August 2004 (2007)

The file and the Database Mertens-Pack3 of the CEDOPAL of the University of Liège (Belgium) complement each other with a unique collection to the world, begun more than forty years ago with the Professor ... [more ▼]

The file and the Database Mertens-Pack3 of the CEDOPAL of the University of Liège (Belgium) complement each other with a unique collection to the world, begun more than forty years ago with the Professor Paul Mertens, and ceaselessly enriched, more than 8000 photos of literary papyri, in black and white for the greater part, accompanied with their archives, that is, essentially, the enormous exchanged correspondence, since the sixties, between the CEDOPAL and the conservators of papyri. To perpetuate its collection of reproductions and give it more easily to the international scientific community, the CEDOPAL began since July, 2003, by means of a " Grant 2003 " of the International Association of Papyrologues, to digitize every photography of papyrus and to archive these images in a specialized database, which also includes informations from archival documents. [less ▲]

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See detail« Construire l’histoire » : un manuel scolaire d’histoire pour demain ?
Jadoulle, Jean-Louis ULg

in LEBRUN M. (Ed.) Le manuel scolaire d’ici et d’ailleurs, d’hier à demain (2007)

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See detailInfluence of different exposure conditions to cigarette smoke on the pulmonary acute inflammatory response in mice
Steuve, J.; Cheu, Esteban ULg; Fievez, Laurence ULg et al

in Proceedings: Autumn Meeting of the Belgian Society of Fundamental and Clinical Physiology and Pharmacology (2007)

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See detailSYNOVIOCYTES, NOT CHONDROCYTES, RELEASE FREE RADICALS AFTER CYCLES OF ANOXIA/RE-OXYGENATION
Schneider, Nicole ULg; Mouithys-Mickalad, Ange ULg; Lejeune, Jean-Philippe ULg et al

Poster (2007)

Introduction : An oxidant activity has been implicated in the onset of equine osteoarthritis. Most of the studies have been done on articular chondrocytes, but little is known about the role of ... [more ▼]

Introduction : An oxidant activity has been implicated in the onset of equine osteoarthritis. Most of the studies have been done on articular chondrocytes, but little is known about the role of synoviocytes. Objective : Our aim was to investigate if equine articular chondrocytes, primary synoviocytes or synoviocytes of a continuous cell line are able to produce free radicals after exposure to anoxia and re-oxygenation. Methods : By oxymetry and electron paramagnetic resonance (EPR), we investigated the effects of repeated anoxia/re-oxygenation (A/R) periods on the respiration and production of free radicals by synoviocytes (rabbit HIG-82 cell line and primary equine synoviocytes) and equine articular chondrocytes. Three periods of 20 min anoxia followed by re-oxygenation were applied to 10exp7 cells; O2 consumption was measured before anoxia and after each re-oxygenation. After the last A/R, cellular free radical formation was investigated by EPR spectroscopy with spin trapping technique (n = 3 for each cell line). Results : Both types of synoviocytes showed a high O2 consumption, which was slower after anoxia. By EPR with the spin trap POBN, we proved a free radical formation. Results were similar for equine and rabbit synoviocytes. For chondrocytes, we observed a low O2 consumption, unchanged by anoxia, and no free radical production. Conclusion : These observations suggest an oxidant activity of synoviocytes, potentially important for the onset of osteoarthritis. [less ▲]

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See detailUitspraakonderwijs en communicatieve aanpak: nog steeds een onmogelijke liefde?
Rasier, Laurent ULg; Hiligsmann, Philippe

Conference (2007)

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See detailVoix et regards de femmes : Francesca Caccini, Barbara Strozzi
Corswarem, Emilie ULg

Conference (2007)

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See detailForming limit predictions for single-point incremental sheet metal forming
Van Bael, A.; Eyckens, P.; He, S. et al

in Cueto, Elías; Chinesta, Francisco (Eds.) Proceedings of the 10th International ESAFORM Conference on Material Forming (2007)

A characteristic of incremental sheet metal forming is that much higher deformations can be achieved than conventional forming limits. In this paper it is investigated to which extent the highly non ... [more ▼]

A characteristic of incremental sheet metal forming is that much higher deformations can be achieved than conventional forming limits. In this paper it is investigated to which extent the highly non-monotonic strain paths during such a process may be responsible for this high formability. A Marciniak-Kuczynski (MK) model is used to predict the onset of necking of a sheet subjected to the strain paths obtained by finite-element simulations. The predicted forming limits are considerably higher than for monotonic loading, but still lower than the experimental ones. This discrepancy is attributed to the strain gradient over the sheet thickness, which is not taken into account in the currently used MK model. [less ▲]

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See detailNumerical modelling of coupled mechanics and gas transfer
Gerard, Pierre ULg; Charlier, Robert ULg; Barnichon, Jean-Dominique et al

Poster (2007)

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