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See detailImplantation d'acide hyaluronique estérifié lors de la microchirurgie des lésions cordales bénignes
FINCK, Camille ULg

Doctoral thesis (2008)

La microchirurgie des pathologies cordales bénignes est pratiquée afin d’améliorer les caractéristiques mécaniques du vibrateur laryngé. C’est en augmentant la souplesse tissulaire et la fermeture ... [more ▼]

La microchirurgie des pathologies cordales bénignes est pratiquée afin d’améliorer les caractéristiques mécaniques du vibrateur laryngé. C’est en augmentant la souplesse tissulaire et la fermeture glottique en phonation que le micro-chirurgien espère améliorer les caractéristiques du son laryngé émis. Les techniques microchirurgicales ont évolué de manière spectaculaire au cours des 20 dernières années grâce à la connaissance de plus en plus approfondie de la structure cordale normale et surtout de son tissu conjonctif : la lamina propria. C’est la partie la plus superficielle de la lamina propria, l’espace de Reinke, qui joue le rôle le plus important dans la production du son. C’est aussi l’espace de Reinke qui est occupé, détruit ou remanié en cas de pathologie cordale bénigne. La microchirurgie vise à le libérer du processus pathologique. L’originalité des techniques microchirurgicales exposées dans ce travail est de tenter, non seulement de libérer l’espace vibrant de la lésion cordale, mais aussi de modifier les processus cicatriciels post-opératoires par l’utilisation d’un implant résorbable d’acide hyaluronique estérifié. Les objectifs de ce travail sont : - de contribuer à la connaissance des résultats fonctionnels laryngés et vocaux observés après une microchirurgie cordale - d’évaluer l’impact fonctionnel, sur ces résultats, de l’utilisation d’un implant résorbable d’acide hyaluronique estérifié, en fin d’intervention chirurgicale. [less ▲]

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See detailDefect growth in model panel paintings by full field interferometry
Kouloumpi, E.; Moutsatsou, A.; Torres, L. et al

Conference (2008, November)

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See detailInterférométrie holographique photoréfractive : nouveaux développements et applications récentes
Thizy, Cédric ULg; Georges, Marc ULg; Hustinx, Guy-Michel et al

Conference (2008, November)

Les cristaux photoréfractifs permettent l'enregistrement holographique dynamique in-situ et une réutilisabilité infinie. Aussi ils possèdent des propriétés spécifiques que d'autres matériaux ... [more ▼]

Les cristaux photoréfractifs permettent l'enregistrement holographique dynamique in-situ et une réutilisabilité infinie. Aussi ils possèdent des propriétés spécifiques que d'autres matériaux holographiques n'ont pas et qui peuvent être utilisées de manière avantageuse en interférométrie holographique. Depuis 15 ans, le CSL développe des techniques d'interférométrie holographique et des instruments basés sur des cristaux de Bi12SiO20 (BSO). Le comportement dynamique de ces derniers permet une grande souplesse d'utilisation de l'interférométrie holographique, à l'instar des techniques basées sur l'enregistrement numérique, tout en fournissant des interférogrammes de meilleure résolution que celles-ci (pas de bruit de speckle, pas de filtrage nécessaire). Par le passé, nous avons déjà présenté une large gamme d'applications en métrologie, contrôle non destructif et mesures vibratoires. Ici nous présentons des applications industrielles récentes obtenue avec une caméra holographique photoréfractive commercialisée. Cette dernière a été utilisée avec succès dans des applications très demandeuses, notamment en terme de résolution. [less ▲]

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See detailEtude de la technique LIBS en vue du tri des vitrocéramiques dans les déchets verriers
Georges, Marc ULg; Carapelle, Alain ULg; Mombaerts, Johan et al

Conference (2008, November)

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See detailCoherent metrology in impact assessment of movable artwork: the MULTIENCODE project
Tornari, V.; Bernikola, E.; Osten, W. et al

Conference (2008, November)

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See detailModelling of forming using Metafor – a large strains FE software
Boman, Romain ULg

Scientific conference (2008, November)

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See detailStructure and evolution of a main segment boundary along the East Anatolian fault, Turkey 2008
Garcia-Moreno, D.; Hubert, Aurelia ULg; Moernaut, J et al

Conference (2008, November)

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See detailSeismic patterns of the Anatolian fault system (Turkey)
Hubert, Aurelia ULg; Fraser, J.; Boes, X et al

Conference (2008, November)

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See detailControlled release of drugs from multi-component biomaterials
Zalfen, Alina ULg; Nizet, D.; Jérôme, Christine ULg et al

in Acta Biomaterialia (2008), 4(6), 1788-1796

In order to control their release, drugs are encapsulated into systems which are expected to provide a certain site with a predetermined amount of drug over a well-defined period of time. Here we report ... [more ▼]

In order to control their release, drugs are encapsulated into systems which are expected to provide a certain site with a predetermined amount of drug over a well-defined period of time. Here we report on a multi-component drug delivery biomaterial that consists of a hydrogel matrix in which drug-loaded biodegradable microcarriers are dispersed, and whose potential applications could be found in the design of implantable devices with long-term activity, as required by contraceptive and hormone replacement treatments. The release profile of the drug can actually be tuned by the complex interplay of several release mechanisms, including the permeability and eventually the degradation rate of the microcarriers and the diffusion through the hydrogel. The hydrogel consisted of 2-hydroxyethyl methacrylate cross-linked by ethylene glycol dimethacrylate. The microcarriers were biodegradable poly-ε-caprolactone (PCL) microspheres in which active molecules, such as levonorgestrel (LNG), were encapsulated. The hydrogels were characterized by water swelling, thermal properties, LNG diffusion through drug-free and drug-depleted hydrogel membranes and LNG release from devices with drug dispersed in the hydrogel. The PCL microspheres were observed by scanning electron microscopy; their size distribution, LNG loading and release were also investigated. The hydrogel-microsphere assemblies were characterized in terms of the distribution of the microspheres within the hydrogel, water swelling and the release of the encapsulated molecules. The developed device, due to its composite structure, has the ability to combine several release mechanisms, leading to drug release obeying zero-order kinetics for most of the time. [less ▲]

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See detailPESTEAUX: A project for building GIS-based tool for the assessment of water pollution risks at local scale due to pesticides.
Bah, Boubacar Billo ULg; Noël, Stéphanie; Buffet, Dominique et al

in Huyghebaert, Bruno; Lorencowicz, Edmund; Uziak, Jacek (Eds.) Farm machinery and process management in sustainable agriculture, III International Scientific Symposium, Gembloux, Belgium, 12-13 November 2008, Tome 2 (2008, November)

Diffuse pollution of water resources due to pesticides uses is a major environmental issue in the European Union, regulated by specific legislations: the Water Framework Directive (Directive 2000/60/EC ... [more ▼]

Diffuse pollution of water resources due to pesticides uses is a major environmental issue in the European Union, regulated by specific legislations: the Water Framework Directive (Directive 2000/60/EC) and the Thematic Strategy on the Sustainable Use of Pesticides. Solving this environmental problem requires methods and tools for spatial risk analysis, notably at a local scale (agricultural parcel level). This paper presents the first developments of a decision support system aiming to assess surface and ground waters pollution risks due to pesticides uses, based on a Geographic Information System (GIS). Different factors affecting pesticide environmental propagation are taken into account, as for example land use, pesticides properties and application modalities, environment characteristics (soil properties, topography, climate, …) as well as surface and ground waters characteristics. A pesticide emission model is used to assess pesticide leaching or runoff to water resources. The reference scale for risks assessment is the agricultural parcel. The quality of the results obtained will be assessed by comparison with existing water monitoring data and related studies. [less ▲]

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See detailPESTEAUX : A project for building GIS-based tool for the assessment of water pollution risks at local scale due to pesticides
Bah, Boubacar Billo ULg; Noël, Stéphanie; Buffet, Dominique et al

Poster (2008, November)

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See detailWhy Leap Over? Redefining the Banks of the Uncanny Valley
Collignon, Stéphane ULg

in Capey, M.; Ip, B.; Blastland, Felicity (Eds.) Inaugural SAND Academic Peer reviewed Papers (2008, November)

proposition de révision du graphique de la Uncanny Valley en fonction des caractéristiques de la caricatures d'une point de vue cognitif et éthologique.

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See detailIntracranial teratomas in children: the role and timing of surgical removal
Noudel, R; Vinchon, M; Dhellemmes, P et al

in Journal of Neurosurgery (2008), 2(5), 331-8

In this study, the authors report their experience with the surgical treatment of intracranial teratomas with an emphasis on the indications for delayed resection after oncological treatment. Methods. The ... [more ▼]

In this study, the authors report their experience with the surgical treatment of intracranial teratomas with an emphasis on the indications for delayed resection after oncological treatment. Methods. The authors retrospectively reviewed the cases of 14 children with intracranial teratomas. The mean age at diagnosis was 10.5 years (range 2 days–18 years), and 11 patients were male. The final histological analysis revealed pure mature teratoma in 5 cases, mixed teratoma with germinoma in 3 cases, and nongerminomatous malignant germ cell tumor in 6 cases. Thirteen patients underwent tumor resection, and these patients were divided into 2 subgroups according to the timing of surgery. In Group A, 10 patients underwent resection as the primary treatment because no tumor markers were detected in 4 patients, a teratomatous component was revealed on biopsy sampling in 3 patients, and a large tumor volume in 3 patients. In Group B, 3 patients underwent removal of residual pure mature teratoma after oncological treatment. Results. Seven of the 8 patients (87.5%) with pure mature teratomas or with mixed teratoma and germinoma are currently alive (mean follow-up of 9 years); the eighth patient died of postoperative meningitis. Two of the 6 patients (33%) with mixed nongerminomatous malignant germ cell tumors died of tumor progression regardless of the timing of surgery. Conclusions. The results of this study support the belief that microsurgical removal is the only effective treatment for intracranial teratomas. Surgery may be performed as the primary therapy when there is evidence of a noninvasive teratoma, and as a secondary therapy if there is only a partial response to neoadjuvant [less ▲]

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See detailA droplet of spectroscopy
Terwagne, Denis ULg; Gilet, Tristan ULg; Vandewalle, Nicolas ULg et al

Conference (2008, November)

Droplet coalescence in a liquid bath can be delayed by oscillating the surface of the bath vertically (frequency from 20 Hz to 400 Hz), the droplet bounces on the interface [1,2]. A low viscous oil ... [more ▼]

Droplet coalescence in a liquid bath can be delayed by oscillating the surface of the bath vertically (frequency from 20 Hz to 400 Hz), the droplet bounces on the interface [1,2]. A low viscous oil droplet is dropped on a high viscous oil bath. We observe that the conditions for bouncing depends on the frequency, more precisely we observe resonance when the eigenfrequency of the droplet is excited. In some conditions, droplet presents a non axi-symmetric mode of deformation. That leads to a rotation of the drop and to a horizontal displacement. [less ▲]

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See detailThe amazing bouncing droplet
Terwagne, Denis ULg; Dorbolo, Stéphane ULg; Vandewalle, Nicolas ULg et al

Poster (2008, November)

When a low viscosity oil droplet is laid onto the surface of a high viscosity oil liquid, it stays at rest for a moment before coalescence. The coalescence can be delayed and sometimes inhibited by ... [more ▼]

When a low viscosity oil droplet is laid onto the surface of a high viscosity oil liquid, it stays at rest for a moment before coalescence. The coalescence can be delayed and sometimes inhibited by injecting fresh air under the droplet. This can happen when the surface of the bath oscillates vertically. In this case the droplet basically bounces on the interface [1, 2]. We observe that the conditions for bouncing depends on the frequency, more precisely we observe resonance when the eigenfrequency of the droplet is excited. Lord Rayleigh expressed the droplet deformation modes in terms of spherical harmonics Y m. We present different l experimental mode of deformation with the corresponding spherical harmonic model. In some conditions, a droplet presents a non axi-symmetric mode of deformation. That leads to a rotation of the droplet and to a horizontal displacement. [less ▲]

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See detailA new iterative approach to the corrective security-constrained optimal power flow problem
Capitanescu, Florin ULg; Wehenkel, Louis ULg

in IEEE Transactions on Power Systems (2008), 23(4), 1342-1351

This paper deals with techniques to solve the corrective security-constrained optimal power flow (CSCOPF) problem. To this end, we propose a new iterative approach that comprises four modules: a CSCOPF ... [more ▼]

This paper deals with techniques to solve the corrective security-constrained optimal power flow (CSCOPF) problem. To this end, we propose a new iterative approach that comprises four modules: a CSCOPF which considers only a subset of potentially binding contingencies among the postulated ones, a (steady-state) security analysis (SSSA), a contingency filtering (CF) technique, and an OPF variant to check post-contingency state feasibility when taking into account post-contingency corrective actions. We compare performances of our approach and its possible variants with classical CSCOPF approaches such as the direct approach and Benders decomposition (BD), on three systems of 60, 118, and 1203 buses. [less ▲]

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See detailChirurgue Bariatrique. morbi-mortalité chez les patients diabétiques.
RADERMECKER, Régis ULg

in Diabétologie Pratique (2008), 22

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See detailcarnet de pédiatrie en Afrique: Eléments d'endocrinologie périnatale
Battisti, Oreste ULg

Learning material (2008)

this presentation concerns practical aspects of hypo- and hyperthyroidism, and insulinic diabetes in the perinatal and neonatal periods

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See detailIntervention cognitive auprès d'enfants cancéreux
Badot, Isabelle; Missotten, Pierre ULg; Etienne, Anne-Marie ULg

Conference given outside the academic context (2008)

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Peer Reviewed
See detailFirst Report of Fusarium Head Blight (FHB) on Winter Wheat in the Grand Duchy of Luxembourg
Giraud, Frédéric; Vrancken, Carine; Delfosse, Philippe et al

in Plant Disease (2008), 92

Detailed reference viewed: 19 (2 ULg)