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See detailAnnular Groove Phase Mask coronagraph in diamond for mid-IR wavelengths
Delacroix, Christian ULg; Mawet, Dimitri; Surdej, Jean ULg et al

Poster (2010, April 25)

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See detailAnnular groove phase mask coronagraph in diamond for mid-IR wavelengths: manufacturing assessment and performance analysis
Delacroix, Christian ULg; Forsberg, P.; Karlsson, M. et al

in Oschmann, J.; Clampin, M.; MacEwen, H. (Eds.) Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave (2010, July 01)

Phase-mask coronagraphs are known to provide high contrast imaging capabilities while preserving a small inner working angle, which allows searching for exoplanets or circumstellar disks with smaller ... [more ▼]

Phase-mask coronagraphs are known to provide high contrast imaging capabilities while preserving a small inner working angle, which allows searching for exoplanets or circumstellar disks with smaller telescopes or at longer wavelengths. The AGPM (Annular Groove Phase Mask, Mawet et al. 2005[SUP]1[/SUP]) is an optical vectorial vortex coronagraph (or vector vortex) induced by a rotationally symmetric subwavelength grating (i.e. with a period smaller than λ/n, λ being the observed wavelength and n the refractive index of the grating substrate). In this paper, we present our first midinfrared AGPM prototypes imprinted on a diamond substrate. We firstly give an extrapolation of the expected coronagraph performances in the N-band (~10 μm), and prospects for down-scaling the technology to the most wanted L-band (~3.5 μm). We then present the manufacturing and measurement results, using diamond-optimized microfabrication techniques such as nano-imprint lithography (NIL) and reactive ion etching (RIE). Finally, the subwavelength grating profile metrology combines surface metrology (scanning electron microscopy, atomic force microscopy, white light interferometry) with diffractometry on an optical polarimetric bench and cross correlation with theoretical simulations using rigorous coupled wave analysis (RCWA). [less ▲]

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See detailThe annular groove phase mask coronagraph: an achromatic optical vortex
Mawet, D.; Riaud, Pierre ULg; Hanot, Charles ULg et al

in Coulter, Daniel R (Ed.) "Techniques and Instrumentation for Detection of Exoplanets III" Proceedings of the SPIE, Volume 6693, Society of Photo-Optical Instrumentation Engineers (SPIE) Conference Series (2007, September 01)

The Annular Groove Phase Mask coronagraph (AGPM) is an intrinsically achromatic vectorial vortex. It consists of integrated subwavelength optical elements whose space-variant polarization properties can ... [more ▼]

The Annular Groove Phase Mask coronagraph (AGPM) is an intrinsically achromatic vectorial vortex. It consists of integrated subwavelength optical elements whose space-variant polarization properties can be engineered and optimized to synthesize one of the theoretically most efficient coronagraphs. This paper briefly recalls the principles of the AGPM, presents the benefit of its implementation inside a polarimetric differential imager, realistic numerical simulations assessing its performances, as well as the current status of the near-infrared and visible prototype manufacturing operations. [less ▲]

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See detailAnnulation d'un régime transitoire et droits acquis: L'administration peut-elle refaire le travail?
Lagasse, Benoît ULg; Stéphane, Rixhon ULg

in Administration Publique [=AP] : Revue du Droit Public et des Sciences Administratives (2014)

Commentaire d'un arrêt du Conseil d'Etat concernant d'une part les relations entre le principe de non-rétroactivité des actes administratifs et les droits acquis et d'autre part les rapports entre ce ... [more ▼]

Commentaire d'un arrêt du Conseil d'Etat concernant d'une part les relations entre le principe de non-rétroactivité des actes administratifs et les droits acquis et d'autre part les rapports entre ce dernier principe et le maintien des effets des actes administratifs. [less ▲]

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See detailAnnulation d'une sentence arbitrale: questions diverses
Caprasse, Olivier ULg

in Droit des Affaires : Revue Internationale du Droit des Affaires = Ondernemingsrecht : Internationaal Tijdschrift voor Ondernemingsrecht [= DA OR] (2006)

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See detailL'annulation des sentences arbitrales
Caprasse, Olivier ULg; Hanotiau, Bernard

in Journal des Tribunaux (2004)

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See detailAnodal transcranial direct current stimulation over the visual cortex as a preventive treatment of migraine: a proof-of-concept study.
Sasso d'Elia, Tullia; Vigano, Alessandro; SAVA, Simona Liliana ULg et al

in Frontiers in Human Neuroscience (2012, September)

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See detailAnodal transcranial direct stimulation (tDCS) targeting the anterior cingulate gyrus for the preventive treatment of chronic cluster headache: a proof of concept trial.
MAGIS, Delphine ULg; D'Ostilio, Kevin ULg; Cosseddu, Anna et al

Poster (2016, April)

Background There is a need for better treatments in chronic cluster headache (CCH). In responders to percutaneous occipital nerve stimulation, the subgenual anterior cingulate gyrus (sACG) was found ... [more ▼]

Background There is a need for better treatments in chronic cluster headache (CCH). In responders to percutaneous occipital nerve stimulation, the subgenual anterior cingulate gyrus (sACG) was found hypermetabolic (Magis et al. 2011). We reasoned that activation of this area by transcranial neurostimulation could be effective in CCH. Aim To explore the preventive effect of anodal (i.e. activating) transcranial direct current stimulation (tDCS) targeting the anterior cingulate gyrus in CCH patients. Method & subjects Difficult-to-treat CCH patients with a stable preventive drug regimen applied tDCS (2mA) interictally in 20-minute daily sessions for 4 weeks with the anode positioned over the forehead (FpZ), the cathode over the C7 spinous process. Therapeutic effects were monitored with paper diaries. Results Nineteen patients were enrolled up to now. In 13 patients who completed the trial, mean weekly attack frequency decreased by 38% after 4 weeks of daily stimulation (W-test: p = 0.002). The 50% responder rate was 54%. Patients (n=12) reported an improvement in headache impact, as shown by 5-point decrease in the mean HIT-6 score (from 67 to 62, p = 0.02). In 10 patients who were followed up after the treatment period, the benefit remained stable up to 4 weeks after the last stimulation. The first 3 enrolled patients had superficial skin burns under the adhesive cathode electrode. Sponge electrodes were therefore used in all subsequent patients without any adverse effect. Conclusion Anodal tDCS targeting the anterior cingulate gyrus seems promising for the preventive treatment of chronic cluster headache as suggested by this ongoing proof-of-concept trial. Use of adhesive electrodes is not recommended. [less ▲]

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See detailAnode (electro)catalysts for direct borohydride and ammonia borane fuel cells
Olu, Pierre-Yves ULg; Zadick, Anicet; Job, Nathalie ULg et al

in Electrocatalysts for low temperature fuel cells. Fundamental and recent trends. (in press)

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See detailL'anoestrus du post-Partum
Derivaux, Jules; Beckers, Jean-François ULg; Ectors, Francis ULg

in Vlaams Diergeneeskundig Tijdschrift (1984), 53

The authors give a survey of the actual knowledge about the fundamental endocrinology of the ovarian cycle in the bovine. In an experiment using 5 dry cows, 20 cows milked twice daily, and 5 freely ... [more ▼]

The authors give a survey of the actual knowledge about the fundamental endocrinology of the ovarian cycle in the bovine. In an experiment using 5 dry cows, 20 cows milked twice daily, and 5 freely suckled cows, a comparative study was made about the post partum ovarian activity by checking heat, by rectal palpation, and by analysis of daily blood and milk samples for ovarian steroids and gonadotropins. For the 3 groups of cows, the first postpartum ovulation was noted at respectively 23, 45, 115 days after parturition. Originally it was thought that a hypersecretion of prolactin was responsible, but no effect could be observed after administration of the prolactin-inhibitor bromocryptine. More recent experimental studies have shown that milking and especially suckling acts as a stess factor, provoking an increased secretion and release of corticosteroids and a decreased blood level of LH, largely responsible for the prolonged post-partum anoestrus period. The logical treatment is weaning, but this technique is often economically difficult to apply in beef cattle. The most indicated alternative treatment to speed up the first postpartum oestrus is the use of the vaginal coil (PRID) containing 2-3 g of progesterone and carrying a capsule with 10 mg of oestradiolbenzoate. The latter stimulates the resorption of progesterone. The coil was removed after 12 days and 500 IU of PMSG were injected. In anoestrous beef cattle, an ovulatory oestrus was induced with a conception rate of 45%. [less ▲]

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See detailL'anoestrus fonctionnel chez la génisse
Ectors, Francis; Beckers, Jean-François ULg

Article for general public (1987)

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See detailAnomalie pluviométrique négative sur le Sud-est du Zaïre en janvier 1992
Kalombo, K.; Erpicum, Michel ULg; Lahuec, J. P.

in Publications de l'Association Internationale de Climatologie (1994), 7

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See detailAnomalie rénale de l'excrétion sodée, un marqueur de la prédisposition héréditaire à l'hypertension artérielle, rôle de la dopamine?
Krzesinski, Jean-Marie ULg; Warling, X.; Goffard, A. et al

in Archives des Maladies du Coeur et des Vaisseaux (1989), 82(7), 1245-1248

Since Dahl's observation, a renal defect os sodium excretion is proposed as one of pathogenetic mechanism of hypertension (HTA). Our study has tried to verify this concept in 20 young normotensives with ... [more ▼]

Since Dahl's observation, a renal defect os sodium excretion is proposed as one of pathogenetic mechanism of hypertension (HTA). Our study has tried to verify this concept in 20 young normotensives with (n = 12) and without (n = 8) familial predisposition to HTA, allowing to test the genetic transmission of such potential renal abnormality of sodium balance. Each people was submitted to 3 different Na diet (20, 170 and 340 mM NaCl) each for 1 week. At each visit, blood pressure, vascular resistances, biological values were determined at rest (plasma renin activity, creatinine clearance, 24 hours before the test, catecholamines, aldosterone and ion urinary excretion). Then 1 liter of isotonic saline was perfused in 30 minutes with measures of blood pressure and 3 hours urinary dopamine and Na excretion. During the low and medium Na diets, but not during the high Na diet, the natriuresis and dopamine excretion were lower in the 3 hour urine collection in patients with a family history of HTA (p less than 0.02 and p less than 0.005, respectively). No other clinical or biological difference was noted between the 2 groups. Thus, genetic hypertensive predisposition seems to be characterized by a lower Na excretion during acute Na loading in normal or depleted Na diet, linked to an impaired urinary dopamine excretion. These findings suggest that the defect responsible for the susceptibility to sodium intake is at the kidney level. Some dopamine agonists would be of great therapeutical value in treating such patients when blood pressure begins to rise. [less ▲]

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See detailLes anomalies congenitales des vaisseaux de la base du coeur: "ring" et "sling" vasculaires. A propos d'un cas
Radermecker, M. A.; Massin, M.; Grenade, Thierry ULg et al

in Revue Médicale de Liège (1999), 54(10), 823-8

We present a case of double aortic arch corrected by surgical interruption and full mobilization of the trachea and the esophagus. The vascular malformations of the supraaortic trunks, which form more or ... [more ▼]

We present a case of double aortic arch corrected by surgical interruption and full mobilization of the trachea and the esophagus. The vascular malformations of the supraaortic trunks, which form more or less complete vascular rings encircling the esophagus and the trachea, are reviewed. The different presentations of double aortic arch, aberrant subclavian arteries, and abnormal development of the pulmonary arteries are discussed. [less ▲]

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See detailLes anomalies congénitales en race blanc-bleu belge
Sartelet, Arnaud ULg

Conference given outside the academic context (2009)

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See detailLes anomalies d'insertion placentaire
Chantraine, Frédéric ULg; Foidart, Jean-Michel ULg

in Gunaïkeia (2009), 14(4), 121-123

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See detailAnomalies de l’expérience de soi dans la schizophrénie : Comparaison avec les représentations des proches
Englebert, Jérôme ULg; Lo Presti, Fanny

Poster (2016, January 20)

Notre objectif est de comparer les expériences (inter-)subjectives de personnes souffrant de schizophrénie avec la perception que leurs proches en ont. L'instrument de mesure utilisé est l'échelle EASE ... [more ▼]

Notre objectif est de comparer les expériences (inter-)subjectives de personnes souffrant de schizophrénie avec la perception que leurs proches en ont. L'instrument de mesure utilisé est l'échelle EASE (Évaluation des Anomalies de l’Expérience de Soi) qui permet, dans une orientation phénoménologique, une exploration semi-structurée en première personne des troubles de la conscience de soi. L'échantillon est composé de cinq personnes atteintes de schizophrénie et de cinq proches. Il a été demandé au patient de choisir comme « proche » la personne la plus significative pour lui. L’hypothèse centrale sur laquelle repose notre étude est qu’il existe une différence qualitative entre le discours du patient (perspective en première personne) et les représentations du proche (perspective en troisième personne). Les entrevues semi-structurées se sont déroulées individuellement, d’abord avec le patient, ensuite avec le proche. Les résultats de cette étude qualitative sont nombreux et suggèrent de nombreuses pistes d’analyse. L’une d’elle suggère notamment que les impressions des proches concernant le vécu (inter-)subjectif des patients dépendrait particulièrement de leur connaissance de la maladie de manière générale, de la qualité des échanges avec le patient mais aussi de leur regard/avis concernant la maladie. Nous observons que la communication est nettement plus présente chez les deux binômes de notre échantillon ayant le moins de différence entre les deux discours. De plus, ces deux binômes étaient également composés des deux patients les plus jeunes. Nous pourrions, dès lors, suggérer que les proches seraient plus attentifs au comportement du patient lors des premières phases de la maladie et que leurs démarches pour comprendre cette dernière soient également plus actives. [less ▲]

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See detailAnomalies de l’expérience de soi exprimées par le sujet schizophrène et par ses proches
Lo Presti, Fanny; Englebert, Jérôme ULg

Scientific conference (2015, November 19)

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See detailAnomalies des cellules de l'immunite naturelle et risque infectieux chez le patient diabetique
Moutschen, Michel ULg

in Revue Médicale de Liège (2005), 60(5-6, May-Jun), 541-4

This review addresses the recent litterature devoted to the risk of severe infections in patients with diabetes and to the potential influence of diabetes on the function of natural immunity. Although ... [more ▼]

This review addresses the recent litterature devoted to the risk of severe infections in patients with diabetes and to the potential influence of diabetes on the function of natural immunity. Although much controversy still exists regarding the incidence of infections in diabetic patients, several studies confirm that diabetes mellitus is associated with an increased severity and mortality in community acquired pneumonia. Furthermore, the risk of severe bacteremia (especially associated with Streptococcus pneumoniae) is higher in diabetic patients. Polynuclear neutrophils are clearly influenced by the diabetic state. On the one hand, their antimicrobial function is inhibited by hyperglycaemia, due to inhibition of G6PD or diversion of NADPH in the polyol pathway; on the other hand, the AGE/RAGE/NF-kappaB pathway involved in the pathogenesis of chronic complications of diabetes could also amplify inflammatory systemic manifestations associated with infections and play a role in the higher mortality rate observed in diabetic subjects with severe infections. These observations argue for the systematic vaccination of all diabetic patients against influenza and Streptococcus pneumoniae, for the reappraisal of diabetes as a significant pejorative risk factor in community acquired pneumonia and for intensive insulin therapy in all diabetic patients with severe infection. [less ▲]

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