Publications ORBi OA
Bookmark and Share    
Full Text
See detailPour une sémiotique indisciplinée
Badir, Sémir ULg

E-print/Working paper (2007)

Detailed reference viewed: 30 (0 ULg)
Full Text
Peer Reviewed
See detailIdentificación de parámetros de viscoelasticidad finita aplicada a la simulación del comportamiento mecánico de masa encefálica
Fancello, Eduardo; Vigneron, Lara; Noels, Ludovic ULg et al

in Congreso Iberoamericano de Ingenieria Mecanica (2007, October)

Detailed reference viewed: 349 (11 ULg)
Full Text
Peer Reviewed
See detailLaboratory, field and airborne spectroscopy for monitoring organic carbon content in agricultural soils
Stevens, A.; van Wesemael, B.; Tychon, Bernard ULg et al

Conference (2007, October)

This study explains the potential and the limits of a field ASD spectrometer and a CASI airborne instrument to assess the Soil Organic Carbon, in the context of soil carbon mapping.

Detailed reference viewed: 28 (2 ULg)
Full Text
See detailAssessment of Lake Sediment Sensitivity along the North Anatolian Fault
Boes, Xavier; Ulas, Avsar; King, J et al

Conference (2007, October)

Detailed reference viewed: 12 (1 ULg)
Full Text
Peer Reviewed
See detailEvaluation de la résistance des aménagements par techniques végétales face aux événements hydrologiques
Peeters, Alexandre ULg; Hallot, Eric ULg; Houbrechts, Geoffrey ULg et al

Poster (2007, October)

Lors du suivi géomorphologique d’aménagement ou de restauration de cours d’eau par techniques végétales réalisé en Région Wallonne, nous nous sommes entre autres intéressés à la résistance que ces ... [more ▼]

Lors du suivi géomorphologique d’aménagement ou de restauration de cours d’eau par techniques végétales réalisé en Région Wallonne, nous nous sommes entre autres intéressés à la résistance que ces techniques offraient face aux différents évènements hydrologiques. Nous avons étudié plusieurs types de techniques (telles que plantations, caissons, épis, peignes et fascines, végétalisation de gabions, techniques combinées...) réalisés sur des rivières de différentes tailles, situées dans des contextes géomorphologiques régionaux variés (impliquant une dynamique différente). La résistance de ces techniques a été évaluée en utilisant la puissance spécifique calculée lors des différentes crues subies par l’aménagement. Cette dernière représente la capacité de travail qu'une rivière peut effectuer et elle permet, ente autres, d'appréhender l'activité des rivières en ce qui concerne les formes et la dynamique des méandres (Ferguson, 1981 ; Bravard, 1991) mais également la possibilité de réaction et d'adaptation des rivières en réponse à des travaux d'aménagement (Brookes, 1998). Les puissances spécifiques ont été calculées non seulement pour le débit à plein bord mais aussi pour la première crue importante survenue après la mise en place du chantier. Par ailleurs, les récurrences des crues ont également été déterminées. Ces premiers résultats nous permettent de proposer une synthèse s’intégrant dans un guide technique (Technique végétales : conception, application et recommandations, GIREA - LHGF) destinés aux différents gestionnaires. BRAVARD J.P., 1991. La dynamique fluviale à l’épreuve des changements environnementaux : Quels enseignements applicables à l’aménagement des rivières ? La Houille Blanche, 7-8, 515-521. BROOKES A., 1988. Channelized rivers, perspectives for environmental management. Wiley, New York, 326 p. FERGUSON R.I., 1981. Channel form and channel changes ; In British Rivers, Lewin J. (Ed), Allen, London,, 91- 125. [less ▲]

Detailed reference viewed: 16 (5 ULg)
Full Text
See detailAccoucher et naître: de jadis a aujourd'hui
Thoumsin, H.; Emonts, Patrick ULg

in Revue Médicale de Liège (2007), 62(10), 616-23

Nowadays in industrialized regions, the majority of childbirths take place in a hospital under high medical and paramedical supervision; this renders the rate of perinatal events very low. This ... [more ▼]

Nowadays in industrialized regions, the majority of childbirths take place in a hospital under high medical and paramedical supervision; this renders the rate of perinatal events very low. This obstetrical safety progressively developped through a practice that, at times, was studded with strange recommendations as well as ingenious concepts. The progress of Medicine and the emancipation of Woman deeply modified the approach to child delivery and influence the importance of its different actors. The current tendency towards a "more natural delivery" may be stepping away from the security of childbirth in a hospital setting. [less ▲]

Detailed reference viewed: 56 (0 ULg)
Full Text
Peer Reviewed
See detailEarly maturation of gonadotropin-releasing hormone secretion and sexual precocity after exposure of infant female rats to estradiol or dichlorodiphenyltrichloroethane
Rasier, Gregory; Parent, Anne-Simone ULg; Gerard, Arlette ULg et al

in Biology of Reproduction (2007), 77(4), 734-742

An increase in the frequency of pulsatile gonadotropin-releasing hormone (GnRH) secretion in vitro and a reduction in LH response to GnRH in vivo characterize hypothalamic-pituitary maturation before ... [more ▼]

An increase in the frequency of pulsatile gonadotropin-releasing hormone (GnRH) secretion in vitro and a reduction in LH response to GnRH in vivo characterize hypothalamic-pituitary maturation before puberty in the female rat. In girls migrating for international adoption, sexual precocity is frequent and could implicate former exposure to the insecticide dichlorodiphenyltrichloroethane (DDT), since a long-lasting DDT derivative has been detected in the serum of such children. We aimed at studying the effects of early transient exposure to estradiol (E 2) or DDT in vitro and in vivo in the infantile female rat. Using a static incubation system of hypothalamic explants from 15-day-old female rats, a concentration- and time-dependent reduction in GnRH interpulse interval (IPI) was seen during incubation with E 2 and DDT isomers. These effects were prevented by antagonists of alpha-amino-3-hydroxy-5-methyl-isoxazole-4 propionic acid (AMPA)/kainate receptors and estrogen receptor. Also, o,p '-DDT effects were prevented by an antagonist of the aryl hydrocarbon orphan dioxin receptor (AHR). After subcutaneous injections of E, or o,p '-DDT between Postnatal Days (PNDs) 6 and 10, a decreased GnRH IPI was observed on PND 15 as an ex vivo effect. After DDT administration, serum LH levels in response to GnRH were not different from controls on PIND 15, whereas they tended to be lower on PND 22. Subsequently, early vaginal opening (VO) and first estrus were observed together with a premature age-related decrease in LH response to GnRH. After prolonged exposure to E 2 between PNDs 6 and 40, VO occurred at an earlier age, but first estrus was delayed. We conclude that a transient exposure to E 2 or o,p '-DDT in early postnatal life is followed by early maturation of pulsatile GnRH secretion and, subsequently, early developmental reduction of LH response to GnRH that are possible mechanisms of the subsequent sexual precocity. The early maturation of pulsatile GnRH secretion could involve effects mediated through estrogen receptor and/or AHR as well as AMPA/kainate subtype of glutamate receptors. [less ▲]

Detailed reference viewed: 22 (1 ULg)
Full Text
Peer Reviewed
See detailAlmost-common path interferometer using the separation of polarization states for digital phase-shifting shearography
Rosso, Vanessa ULg; Renotte, Yvon ULg; Habraken, Serge ULg et al

in Optical Engineering : The Journal of the Society of Photo-Optical Instrumentation Engineers (2007), 46(10),

An original experimental setup for shearography with metrological applications is presented. The simplicity and the efficiency of the setup are provided by a shearing device, a prism that separates the TE ... [more ▼]

An original experimental setup for shearography with metrological applications is presented. The simplicity and the efficiency of the setup are provided by a shearing device, a prism that separates the TE and TM polarization modes with a coating and a thin glass plate placed on its face. The use of this shearing device enables an in-line and almost-common path configuration for the shearing interferometer, a path that leads to high stability and a low sensitivity to external disturbances. Moreover, the sensitivity of the interferometer can be easily adjusted for different applications by varying the shearing amount with glass plates of different thicknesses or by moving the shearing device between two lenses along the optical axis. The temporal phase-shifting method is applied through the use of a liquid crystal variable retarder. (c) 2007 Society of Photo-Optical Instrumentation Engineers. [less ▲]

Detailed reference viewed: 141 (27 ULg)
Full Text
See detailThe lifetime of bouncing droplets
Terwagne, Denis ULg; Vandewalle, Nicolas ULg; Dorbolo, Stéphane ULg

Conference (2007, October)

Detailed reference viewed: 8 (2 ULg)
Full Text
Peer Reviewed
See detailThe clinical, pathological, and genetic features of familial isolated pituitary adenomas
Beckers, Albert ULg; Daly, Adrian ULg

in European Journal of Endocrinology (2007), 157(4), 371-382

Pituitary adenomas occur in a familial setting in multiple endocrine neoplasia type 1 (MEN1) and Carney's complex (CNC), which occur due to mutations in the genes MEN1 and PRKAR1A respectively. Isolated ... [more ▼]

Pituitary adenomas occur in a familial setting in multiple endocrine neoplasia type 1 (MEN1) and Carney's complex (CNC), which occur due to mutations in the genes MEN1 and PRKAR1A respectively. Isolated familial somatotropinoma (IFS) is also a well-described clinical syndrome retated only to patients with acrogigantism. Pituitary adenomas of all types - not limited to IFS - can occur in a familial setting in the absence of MEN1 and CNC; this phenotype is tcrmed familial isolated pituitary adenomas (FIPA). Over the past 7 years, we have described over 90 FIPA kindreds. In FIPA, both homogeneous and heterogeneous pituitary adenoma phenotypes can occur within families; virtually all FIPA kindreds contain at least one prolactinoma or somatotropinoma. FIPA differs from MEN1 in terms of a lower proportion of prolactinomas and more frequent somatotropinomas in the FIPA cohort. Patients with FIPA are significantly younger at diagnosis and have significantly larger pituitary adenomas than matched sporadic pituitary adenoma counterparts. A minority of FIPA families overall (15%) exhibit mutations in the aryl hydrocarbon receptor-interacting protein (AIP) gene; AIP mutations are present in only half of IFS kindreds occurring as part of the FIPA cohort. In families with AIP mutations, pituitary adenomas have a penetrance of over 50%. AIP mutations are extremely rare in patients with sporadic pituitary adenomas. This review deals with pituitary adenomas that occur in a familial setting, describes in detail the clinical, pathological, and genetic features of FIPA, and addresses aspects of the clinical approach to FIPA families with and without AIP mutations. [less ▲]

Detailed reference viewed: 25 (11 ULg)
Full Text
See detailMethodology for the integration of process studies and development of a decision support tool (FRAC-WECO Project Deliverable D1.2)
Brouyère, Serge ULg; Hérivaux, Cécile; Haberman, Michaël et al

Report (2007)

This deliverable allows one to clarify the objectives of the different partners involved in the FRAC-WECO project and how they are going to interact, to exchange data, research results and knowledge in ... [more ▼]

This deliverable allows one to clarify the objectives of the different partners involved in the FRAC-WECO project and how they are going to interact, to exchange data, research results and knowledge in order to meet the ambitious objectives of the project. Particularly, the complex interactions between researches dealing with physical processes and with socio-economic aspects have been described in details. The modelling applications will constitute the key interacting tools as they are going to integrate all the information on water and contaminant mass fluxes and on biogeochemical processes affecting the fate of contaminant in the field and they are also going to be used to produce all data required for risk assessment and for the socio-economic analysis which are two of the most important expected outcomes of the project. The deliverable also clarifies the use of flux-based concepts through the definition of risk assessment indicators in the form of contaminant mass fluxes and discharge at the various considered receptors. Finally, this document has also allowed one to clarify the scope and the limits of the researches foreseen in the FRAC-WECO project that will focus on the risk of contaminant leaching to groundwater, of contaminant dispersion through groundwater and on the impact of contaminant on groundwater and surface water as affected by groundwater discharge and on the impact on aquatic ecosystems. [less ▲]

Detailed reference viewed: 14 (1 ULg)
Full Text
See detailReal time TEC monitoring using triple frequency GNSS data : a three step approach
Spits, Justine; Warnant, René ULg

in Proceedings of the First International Colloquium - Scientific and Fundamental Aspects of the Galileo Programme (2007, October)

Detailed reference viewed: 34 (0 ULg)
Full Text
See detailMachines et Systèmes Thermiques
Lebrun, Jean ULg; Lemort, Vincent ULg

Learning material (2007)

Detailed reference viewed: 144 (17 ULg)
Full Text
Peer Reviewed
See detailMulticriterion Scantling Optimization of the Midship Section of a Passenger Vessel considering IACS Requirements
Richir, Thomas; Caprace, Jean-David ULg; Losseau, Nicolas ULg et al

in The 10th International Symposium on Practical Design of Ships and Other Floating Structures (PRADS) (2007, October)

In the scantling design of a passenger ship, minimum production cost, minimum weight and maximum moment of inertia (stiffness) are conflicting objectives. For that purpose, recent improvements were made ... [more ▼]

In the scantling design of a passenger ship, minimum production cost, minimum weight and maximum moment of inertia (stiffness) are conflicting objectives. For that purpose, recent improvements were made to the LBR-5 software (French acronym of “Stiffened Panels Software”, version 5.0) to optimize the scantling of ship sections by considering production cost, weight and moment of inertia in the optimization objective function. Moreover, IACS requirements regarding bending, shearing and buckling strength are currently available in LBR-5. Until now, only raw scantling optimizations were performed with LBR-5. Thanks to new developments using heuristics, it is now possible to realize discrete optimization so that a standardized and “ready to use” set of optimum scantlings can be obtained. [less ▲]

Detailed reference viewed: 333 (50 ULg)
Full Text
Peer Reviewed
See detail14th Annual meeting of the Belgian Transplantation Society - March 27, 2007, Brussels, Belgium - Preface
Detry, Olivier ULg; Donckier, Vincent

in Transplantation Proceedings (2007), 39(8), 2633-2633

Detailed reference viewed: 91 (32 ULg)
Full Text
Peer Reviewed
See detailAdherence to treatment of osteoporosis: a need for study
Lekkerkerker, F.; Kanis, J. A.; Alsayed, N. et al

in Osteoporosis International (2007), 18(10), 1311-1317

Adherence to anti-osteoporosis medications is currently low and is associated with poor anti-fracture efficacy. This manuscript reviews the potential design of clinical studies that aim to demonstrate ... [more ▼]

Adherence to anti-osteoporosis medications is currently low and is associated with poor anti-fracture efficacy. This manuscript reviews the potential design of clinical studies that aim to demonstrate improved adherence, with new chemical entities to be used in the management of osteoporosis. Introduction Several medications have been unequivocally shown to decrease fracture rates in clinical trials. However, in real life settings, long-term persistence and compliance to anti-osteoporosis medication is poor, hence decreasing the clinical benefits for patients. Methods An extensive search of Medline from 1985 to 2006 retrieved all trials including the keywords osteoporosis, compliance, persistence or adherence followed by a critical appraisal of the data obtained through a consensus expert meeting. Results The impact of non-adherence on the clinical development of interventions is reviewed, so that clinicians, regulatory agencies and reimbursement agencies might be better informed of the problem, in order to stimulate the necessary research to document adherence. Conclusion Adherence to therapy is a major problem in the treatment of osteoporosis. Both patients and medication factors are involved. Adherence studies are an important aspect of outcomes studies, but study methodologies are not well developed at the moment and should be improved. Performing adherence studies will be stimulated when registration authorities accept the result of these studies and include the relevant information in Sect. 5.1 of the summary of product characteristics. Reimbursement authorities might also consider such studies as important information for decisions on reimbursement. [less ▲]

Detailed reference viewed: 39 (2 ULg)
Full Text
Peer Reviewed
See detailComparison of inhibitory functioning in mild Alzheimer's disease and frontotemporal dementia
Collette, Fabienne ULg; Amieva, Hélène; Adam, Stéphane ULg et al

in Cortex : A Journal Devoted to the Study of the Nervous System & Behavior (2007), 43(7), 866-874

Executive dysfunction is frequently reported in Alzheimer's disease (AD) and the frontal variant of frontotemporal dementia (FTD). More specifically, inhibitory dysfunction is observed early in AD and ... [more ▼]

Executive dysfunction is frequently reported in Alzheimer's disease (AD) and the frontal variant of frontotemporal dementia (FTD). More specifically, inhibitory dysfunction is observed early in AD and inhibitory deficits are also prominent in patients with FTD. However, few studies have simultaneously explored and compared inhibitory abilities in both degenerative diseases. Consequently, the aim of this study was to compare verbal and motor inhibitory processes in the initial stages of AD and the frontal variant of FTD. Stroop and Go/No-go tasks were administered. The results demonstrate that, on the Go/No-go task, AD and FTD patients do not produce more errors than control subjects. However, both groups are impaired on the Stroop task (mainly with regard to the error score) but do not differ from each other. These results indicate that AD and FTD patients do not present a general impairment of their inhibitory abilities. Moreover, these two kinds of dementia present similar quantitative and qualitative inhibitory impairments on the two tasks, although their patterns of structural and functional cerebral impairments are known to be different. The presence of similar inhibitory deficits despite very different patterns of brain damage is in agreement with the hypothesis that inhibitory dysfunction in the two groups of patients depends on a disconnection process between anterior and posterior cerebral areas, rather than on the presence of focal metabolism decreases in different regions. [less ▲]

Detailed reference viewed: 124 (13 ULg)