Publications ORBi OA
Bookmark and Share    
Full Text
Peer Reviewed
See detailAcquisition vidéo au moyen d'une caméra IEEE 1394
Dardenne, Renaud; Van Droogenbroeck, Marc ULg

in Linux Magazine (2005), 69

Pour l'acquisition vidéo grand public, la norme USB 1.1 est devenu le choix le plus courant en matière de standard d'interconnexion. Pour des applications à plus haut débit, les utilisateurs préfèrent ... [more ▼]

Pour l'acquisition vidéo grand public, la norme USB 1.1 est devenu le choix le plus courant en matière de standard d'interconnexion. Pour des applications à plus haut débit, les utilisateurs préfèrent recourir à des cartes d'acquisition vidéo dédiées ou à des normes d'interfaçage génériques, permettant des transferts à débit plus élevé. Cet article explique comment se servir de la norme IEEE 1394, aussi appelée FireWire ou i.Link, pour l'acquisition de séquences vidéo. [less ▲]

Detailed reference viewed: 116 (12 ULg)
Full Text
Peer Reviewed
See detailEffet du colostrum bovin administré à des porcelets au sevrage sur la morphologie de la paroi intestinale et sur le système immunitaire
Boudry, Christelle ULg; Dalle, Marie-Julie; Halleux, Caroline et al

in 37èmes journées de la recherche porcine (2005, February)

Two groups (A and B) of 6 piglets, weaned at 21 days (D0), received ad libitum the same diet during three weeks. The piglets of group A were not submitted to a colostrum supplementation while those of the ... [more ▼]

Two groups (A and B) of 6 piglets, weaned at 21 days (D0), received ad libitum the same diet during three weeks. The piglets of group A were not submitted to a colostrum supplementation while those of the group B received daily and orally 5 g of bovine colostrum. Each week, piglets were weighed and blood was taken on each one of them. One piglet of each group was sacrified on D0 and the rest of the animals on D21. Mesenteric lymph nodes (ML), iléal Peyer patches (iPP), jejunum and spleen biopsies were taken on each piglet before death. The haematological values and the intestinal histo-morphological data between the two groups were not significantly different, but FACS analyses on the lymphocytes in the biopsies and the determination of stimulation index suggested a significative effect of colostrum on the lymphocytes populations, with, in the ML, an increase of the LB population (14 % vs 28 %, P < 0,05) and, in the iPP, a reduction of the LB's (54,99 % vs 8,44 %, P < 0,01) with an increase of the LT cells (16,87 % vs 72,00 %, P < 0,001). An increase of the lymphocyte stimulation index from piglets receiving colostrum was observed the second day of in vitro stimulation with colostrum. In brief, the answer of the immunity system to bovine colostrum seems to be restricted to the intestinal immunity system and is characterised by an activation, a multiplication and a modification of the lymphocytes ratios. [less ▲]

Detailed reference viewed: 121 (10 ULg)
Full Text
Peer Reviewed
See detailThe effect of tibolone in postmenopausal women receiving tamoxifen after surgery for breast cancer: a randomised, double-blind, placebo-controlled trial
Kroiss, R.; Fentiman, I. S.; Helmond, F. A. et al

in BJOG : An International Journal of Obstetrics & Gynaecology (2005), 112(2), 228-233

Objective To assess the effects of tibolone on climacteric symptoms, endometrium and serum lipid/lipoproteins in postmenopausal women receiving tamoxifen after surgery for breast cancer. Design Double ... [more ▼]

Objective To assess the effects of tibolone on climacteric symptoms, endometrium and serum lipid/lipoproteins in postmenopausal women receiving tamoxifen after surgery for breast cancer. Design Double-blind, randomised, placebo-controlled, multicentre pilot study. Setting Hospital outpatient clinic. Sample Seventy postmenopausal women receiving tamoxifen following surgery for early breast cancer. Methods Women received 20 mg/day oral tamoxifen plus either 2.5 mg/day oral tibolone or placebo for 12 months. Main outcome measures Frequency and severity of hot flushes (diary cards); intensity of hot flushes and sweats (Landgren scale); interference of hot flushes and sweats with normal life; frequency and intensity of other climacteric symptoms; endometrial thickness and histology; vaginal bleeding; breast cancer recurrence and serum lipid/lipoproteins. Results Daily card data showed no change in the daily number of hot flushes with either tibolone or placebo (P= 0.219) after three months. There was a significant reduction in the severity of flushes with tibolone compared with placebo (-0.4 vs 0.2, P= 0.031). The Landgren scale showed a mean change in the number of hot flushes of -0.6 with tibolone and +1.1 with placebo after 12 months (P= 0.022). Endometrial biopsies were normal and vaginal bleeding was similar in both groups. A significant decrease in triglycerides (-23%vs 1.4%) and HDL (-12%vs 19%) was seen with tibolone compared with placebo after 12 months. Conclusion Tibolone prevented an increase in hot flushes in postmenopausal women given tamoxifen following surgery for breast cancer without untoward effects on the endometrium. Beneficial effects on serum lipid profile were noted. [less ▲]

Detailed reference viewed: 18 (0 ULg)
Full Text
Peer Reviewed
See detailCombining a stability and a performance-oriented control in power systems
Glavic, M.; Ernst, Damien ULg; Wehenkel, Louis ULg

in IEEE Transactions on Power Systems (2005), 20(1), 525-526

This paper suggests that the appropriate combination of a stability-oriented and a performance-oriented control technique is a promising way to implement advanced control schemes in power systems. The ... [more ▼]

This paper suggests that the appropriate combination of a stability-oriented and a performance-oriented control technique is a promising way to implement advanced control schemes in power systems. The particular approach considered combines control Lyapunov functions (CLF) and reinforcement learning. The capabilities of the resulting controller are illustrated on a control problem involving a thyristor-controlled series capacitor (TCSC) device for damping oscillations in a four-machine power system. [less ▲]

Detailed reference viewed: 25 (1 ULg)
Full Text
Peer Reviewed
See detailThe mitochondrial oxidative phosphorylation proteome of Chlamydomonas reinhardtii deduced from the genome sequencing project
Cardol, Pierre ULg; Gonzalez-Halphen, Diego; Reyes-Prieto, Adrian et al

in Plant Physiology (2005), 137(2), 447-459

Detailed reference viewed: 44 (11 ULg)
Full Text
See detailLa mondialisation comme imaginaire
Grenade, Sophie ULg; Jacquemain, Marc ULg

in Politique : Revue de Débats (2005)

This paper explores the global worldview of the belgian liberal party MR (Mouvement Réformateur) on one side and of the altermondialist group Attac on the other side. It shows that those worldviews may be ... [more ▼]

This paper explores the global worldview of the belgian liberal party MR (Mouvement Réformateur) on one side and of the altermondialist group Attac on the other side. It shows that those worldviews may be counter-intuitive : while the liberal see mainly globalization as a "social and cultural" process, Attac insists on its economic dimension. On the other hand, whle the "dark side" of globalization for liberals is seen in almost epidemiologic termes (fear of mafias, of virus and of men), it is the fluidity of money that is mainly feared by altermondialists. [less ▲]

Detailed reference viewed: 41 (5 ULg)
Full Text
See detailGrafting Information in Scenario Trees: Application to Option Prices
Schyns, Michael ULg; Crama, Yves ULg; Hübner, Georges ULg

E-print/Working paper (2005)

The high level of sophistication in portfolio management modeling techniques often goes along with very large output sensitivity to parameter choices. As a potential solution to this problem, this paper ... [more ▼]

The high level of sophistication in portfolio management modeling techniques often goes along with very large output sensitivity to parameter choices. As a potential solution to this problem, this paper proposes a consistent and flexible methodology to represent the distribution of future values of a portfolio through scenario trees. This methodology relies on the information contained in current option prices in order to generate the probability density function of future returns. This density function can be used, in turn, to generate scenario trees . As an illustration, a tree of scenarios based on S&P500 options is built and then used to compute arbitrage-free option prices. The approach preserves information embedded in options prices and is able to provide very accurate values for out-of-sample options. The high level of numerical accuracy of the framework is reproduced on different samples. The scenario tree approach also provides stable pricing results when confronted with the passage of time. The results derived from our model are comparable to those obtained from Rubinstein’s [1994] methodology, although both models fulfill different objectives. [less ▲]

Detailed reference viewed: 51 (2 ULg)
Full Text
Peer Reviewed
See detailMachining process simulation using Samcef superelement
Masset, Luc ULg; Debongnie, Jean-François ULg; Marty, Audrey

Conference (2005, February)

In this paper, we present a new simulation tool for process engineers. During process design phases, several aspects of machining have to be taken into account. Classical CAD/CAM suites still lack some ... [more ▼]

In this paper, we present a new simulation tool for process engineers. During process design phases, several aspects of machining have to be taken into account. Classical CAD/CAM suites still lack some crucial issues. The goal of the developed tool is to predict the geometric errors of machined surfaces. For classical applications of the automotive domain, form errors are mainly due to the machined part and clamping system flexibility. They are modeled thanks to the FE method. The major peculiarity of the adopted model is to apply numerous load cases. To achieve a low computational coast, we have combined the SAMCEF superelement feature and a specific code to solve the reduced system. This original scheme allows solving efficiently large industrial applications. [less ▲]

Detailed reference viewed: 106 (7 ULg)
Full Text
Peer Reviewed
See detailA metallo-beta-lactamase enzyme in action: Crystal structures of the monozinc carbapenemase CphA and its complex with biapenem
Garau, Gianpiero; Bebrone, Carine ULg; Anne, Christine et al

in Journal of Molecular Biology (2005), 345(4), 785-795

One strategy developed by bacteria to resist the action of beta-lactam antibiotics is the expression of metallo-beta-lactamases. CphA from Aeromonas hydrophila is a member of a clinically important ... [more ▼]

One strategy developed by bacteria to resist the action of beta-lactam antibiotics is the expression of metallo-beta-lactamases. CphA from Aeromonas hydrophila is a member of a clinically important subclass of metallo-beta-lactamases that have only one zinc ion in their active site and for which no structure is available. The crystal structures of wild-type CphA and its N220G mutant show the structural features of the active site of this enzyme, which is modeled specifically for carbapenem hydrolysis. The structure of CphA after reaction with a carbapenem substrate, biapenem, reveals that the enzyme traps a reaction intermediate in the active site. These three X-ray structures have allowed us to propose how the enzyme recognizes carbapenems and suggest a mechanistic pathway for hydrolysis of the beta-lactam. This will be relevant for the design of metallo-beta-lactamase inhibitors as well as of antibiotics that escape their hydrolytic activity. (C) 2004 Elsevier Ltd. All rights reserved. [less ▲]

Detailed reference viewed: 55 (1 ULg)
Full Text
See detailAppréhender le caractère durable des systèmes agraires
Stilmant, Didier ULg; Jamar, Daniel; Debouche, Charles ULg et al

in Proceeding des dixième carrefour des productions animales (2005, January 26)

Detailed reference viewed: 41 (4 ULg)
Full Text
See detailL’eau dans tous ses état : enjeux et difficultés de la gestion des eaux souterraines
Dassargues, Alain ULg

Scientific conference (2005, January 20)

Detailed reference viewed: 12 (0 ULg)
Full Text
Peer Reviewed
See detailThalidomide radiosensitizes tumors through early changes in the tumor microenvironment
ANSIAUX, Reginald; BAUDELET, Christine; JORDAN, Bénédicte et al

in Clinical Cancer Research : An Official Journal of the American Association for Cancer Research (2005), 15(11), 743-750

Purpose: The aim of this work was to study changes in the tumor microenvironment early after an antiangiogenic treatment using thalidomide (a promising angiogenesis inhibitor in a variety of cancers ... [more ▼]

Purpose: The aim of this work was to study changes in the tumor microenvironment early after an antiangiogenic treatment using thalidomide (a promising angiogenesis inhibitor in a variety of cancers), with special focus on a possible normalization of the tumor vasculature that could be exploited to improve radiotherapy. Experimental Design: Tumor oxygenation, perfusion, permeability, interstitial fluid pressure (IFP), and radiation sensitivity were studied in an FSAII tumor model. Mice were treated by daily i.p. injection of thalidomide at a dose of 200 mg/kg. Measurements of the partial pressure of oxygen (pO2) were carried out using electron paramagnetic resonance oximetry. Three complementary techniques were used to assess the blood flow inside the tumor: dynamic contrast-enhanced magnetic resonance imaging, Patent Blue staining, and laser Doppler imaging. IFP was measured by a wick-in-needle technique. Results: Our results show that thalidomide induces tumor reoxygenation within 2 days. This reoxygenation is correlated with a reduction in IFP and an increase in perfusion. These changes can be attributed to extensive vascular remodeling that we observed using CD31 labeling. Conclusions: In summary, the microenvironmental changes induced by thalidomide were sufficient to radio-sensitize tumors. The fact that thalidomide radiosensitization was not observed in vitro, and that in vivo radiosensitization occurred in a narrow time window, lead us to believe that initial vascular normalization by thalidomide accounts for tumor radiosensitization. [less ▲]

Detailed reference viewed: 38 (8 ULg)
Full Text
See detailTsunami : le reflet du clivage Nord-Sud
Ozer, Pierre ULg

Article for general public (2005)

La vague de dix mètres qui a déferlé sur l'Asie du Sud-Est peu après Noël montre à quel point l'Homme est fragile par rapport aux catastrophes naturelles. En outre, elle met en relief la disparité qui ... [more ▼]

La vague de dix mètres qui a déferlé sur l'Asie du Sud-Est peu après Noël montre à quel point l'Homme est fragile par rapport aux catastrophes naturelles. En outre, elle met en relief la disparité qui existe entre les pays développés et le reste du monde. [...] [less ▲]

Detailed reference viewed: 105 (8 ULg)
Full Text
Peer Reviewed
See detailFloch e le forme dell'impronta
Dondero, Maria Giulia ULg

in Espressione/Contenuto : Rivista dell’Associazione Italiana di Studi Semiotici (2005)

Cet article reparcourt un texte fondamental de J.-M. Floch sur la photographie (Formes de l’empreinte, Périgueux, Fanlac, 1986) et vise à faire un point sur la tradition sémiotique greimassienne à partir ... [more ▼]

Cet article reparcourt un texte fondamental de J.-M. Floch sur la photographie (Formes de l’empreinte, Périgueux, Fanlac, 1986) et vise à faire un point sur la tradition sémiotique greimassienne à partir des exigences de la sémiotique d’aujourd’hui, notamment à partir des programmes d’une sémiotique de l’expérience et d’une sémiotique des pratiques culturelles. Ce travail enquête des questions que la sémiotique greimassienne du discours n’a jamais pris en compte, telles les techniques productives de l’image, ses pratiques d’utilisation, ses statuts sociaux. [less ▲]

Detailed reference viewed: 59 (0 ULg)
Full Text
Peer Reviewed
See detailLow-field magnetoresistance in La0.7Ca0.3MnO3 manganite compounds prepared by the spray drying technique
Vertruyen, Bénédicte ULg; Rulmont, André ULg; Cloots, Rudi ULg et al

in Journal of Materials Science (2005), 40(1), 117-122

Calcium-substituted lanthanum manganite compounds were synthesized by the spray drying technique. This method - whose main advantages are versatility, high reproducibility and scalability - yields small ... [more ▼]

Calcium-substituted lanthanum manganite compounds were synthesized by the spray drying technique. This method - whose main advantages are versatility, high reproducibility and scalability - yields small grain materials of high homogeneity and displaying low-field magnetoresistance effects. We report about the physical and chemical characterizations of these samples in order to investigate the potential interest of spray drying for the production of materials for low-field magnetoresistance applications. We have studied the dependence of the low-field magnetoresistance on the temperature and duration of the thermal treatment applied to the pelletized powders. The issue of the shape anisotropy (demagnetisation effects) influence on the magnetoresistance properties has also been dealt with. (C) 2005 Springer Science + Business Media, Inc. [less ▲]

Detailed reference viewed: 49 (7 ULg)
Full Text
See detailQuasars with Gaia: Identification and Astrophysical Parameters
Claeskens, Jean-François ULg; Smette, A.; Surdej, Jean ULg

in Turon, C.; O'Flaherty, K. S.; Perryman, M. A. C. (Eds.) Proceedings of the Gaia Symposium "The Three-Dimensional Universe with Gaia" (ESA SP-576) (2005, January 01)

Gaia will provide astrometric and photometric observations for about 500 000 quasars distributed over the whole sky. The latter would constitute an isotropic grid of fixed sources perfectly suited to ... [more ▼]

Gaia will provide astrometric and photometric observations for about 500 000 quasars distributed over the whole sky. The latter would constitute an isotropic grid of fixed sources perfectly suited to determine the referential frame. However, they must first be properly identified among stars, whose population is about 2000 times larger. Using broad and medium band photometry, we first compare the efficiency of two analysis methods (Ï 2 fitting and Artificial Neural Networks, ANNs) to produce the QSO catalogue with the lowest amount of contamination by stars. We then investigate whether the Gaia photometry could also provide precise values of the QSO astrophysical parameters (APs, like the redshift, the continuum slope, the emission line strength and possibly the extinction). To reach that purpose, we also compare the performances of the Spectral Principal Component Analysis (SPCA) with those of the Ï 2 fitting and ANN analysis. [less ▲]

Detailed reference viewed: 19 (8 ULg)
Full Text
See detailL'astronomie dans le monde
Manfroid, Jean ULg

Article for general public (2005)

P/2004 TU12; trous noirs précoces, astéroide double; d'autres Terres; tremblements d'Eros; parcs cosmiques; jeunes galaxies; anomalie dans le rayonnement 3K; brillant mais bref; supernovae et jolies ... [more ▼]

P/2004 TU12; trous noirs précoces, astéroide double; d'autres Terres; tremblements d'Eros; parcs cosmiques; jeunes galaxies; anomalie dans le rayonnement 3K; brillant mais bref; supernovae et jolies galaxies; capture interstellaire; Cassini; disques et planètes [less ▲]

Detailed reference viewed: 11 (1 ULg)
Full Text
Peer Reviewed
See detailGross total resection or debulking of pituitary adenomas improves hormonal control of acromegaly by somatostatin analogs
Petrossians, Patrick ULg; Borges-Martins, L.; Espinoza, C. et al

in European Journal of Endocrinology (2005), 152(1), 61-66

Introduction: Invasive GH-secreting pituitary adenomas are rarely cured by surgery and although long-term therapy with somatostatin analogs (SSAs) may be employed, hormonal control is achieved in only 60 ... [more ▼]

Introduction: Invasive GH-secreting pituitary adenomas are rarely cured by surgery and although long-term therapy with somatostatin analogs (SSAs) may be employed, hormonal control is achieved in only 60% of cases. The impact of tumor debulking on subsequent control of acromegaly with SSAs has not been studied previously. Methods: We studied retrospectively the response to SSA therapy in acromegalic patients before and after incomplete surgical tumor excision. A case review identified 24 acromegalic patients who had received SSA therapy for 1 month before and after gross total resection or debulking of adenomas. No patient received radiotherapy or combination treatment with SSAs and dopamine agonists during the study. GH and IGF-I responses to SSAs were recorded pre- and postoperatively. Postoperative SSA therapy was begun after a washout period of 1–3 months to assess the hormonal effects of the surgery alone. Results: Before preoperative SSA treatment, 24/24 (100%) patients had elevated GH levels and IGF-I levels were elevated in 19/21 (90.5%) patients with recorded values. During preoperative SSA treatment, GH and IGF-I levels were normalized in 7/24 (29.2%) and 11/24 (45.8%) patients respectively. Following postoperative washout, GH was controlled in only 3/24 (12.5%) patients, while IGF-I was controlled in 8/19 (42.1%) patients with available data. During the second SSA treatment period, normal GH levels were seen in 13/24 (54.2%) patients, while IGF-I control was noted in 18/23 (78.3%). Conclusion: Gross total tumor resection or debulking increases the likelihood of achieving biochemical disease control with SSAs in acromegalic patients with adenomas that were not amenable to complete surgical resection and in whom primary SSA therapy was unable to achieve good biochemical control. [less ▲]

Detailed reference viewed: 49 (5 ULg)
Full Text
Peer Reviewed
See detailGestion des ressources humaines, stratégie et leadership
Robert, Jocelyne ULg

Article for general public (2005)

Detailed reference viewed: 126 (14 ULg)