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See detail3D turbulence field on the north-western european continental-shelf
Martin, Géraldine ULg; Delhez, Eric ULg

in Tellus : Series A (1994), 46(2), 98-112

The 3-dimensional, non-linear, baroclinic, GHER mathematical model for the study of mesoscale motions (time scale of several hours to several days: tides, storm surges, ...) is described. Particular ... [more ▼]

The 3-dimensional, non-linear, baroclinic, GHER mathematical model for the study of mesoscale motions (time scale of several hours to several days: tides, storm surges, ...) is described. Particular attention is paid to the turbulent closure based on an evolution equation for the turbulent kinetic energy and a parametric expression of the mixing length (k-model). Appropriate boundary conditions and numerical techniques (mode-splitting, implicity, sigma-coordinate system, advection scheme) are described. The model is applied to the simulation of the M2 tide on the North-Western European Continental Shelf not only without wind but also in typical winter and summer conditions. Large spatial variations of the turbulent kinetic energy appear as a result of the variations of depth and tidal activity around the shelf. These variations are clearly related to the different turbulence regimes observed in summer, with frontal structures separating well-mixed waters from stratified ones. The structure and evolution of the vertical profiles of turbulence variables are described and explained in barotropic and baroclinic conditions, under different wind forcings. The evolution of these profiles at the M2 tide frequency largely depends on the eccentricity of the tidal ellipse. [less ▲]

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See detail3D Vision
Van Droogenbroeck, Marc ULg

Learning material (2011)

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See detail3D XFEM-based modeling of retraction for preoperative image update.
Vigneron, Lara M.; Warfield, Simon K.; Robe, Pierre ULg et al

in Computer aided surgery : official journal of the International Society for Computer Aided Surgery (2011), 16(3), 121-34

Outcomes for neurosurgery patients can be improved by enhancing intraoperative navigation and guidance. Current navigation systems do not accurately account for intraoperative brain deformation. So far ... [more ▼]

Outcomes for neurosurgery patients can be improved by enhancing intraoperative navigation and guidance. Current navigation systems do not accurately account for intraoperative brain deformation. So far, most studies of brain deformation have focused on brain shift, whereas this paper focuses on the brain deformation due to retraction. The heart of our system is a 3D nonrigid registration technique using a biomechanical model driven by the deformations of key surfaces tracked between two intraoperative images. The key surfaces, e.g., the whole-brain region boundary and the lips of the retraction cut, thus deform due to the combination of gravity and retractor deployment. The tissue discontinuity due to retraction is handled via the eXtended Finite Element Method (XFEM), which has the appealing feature of being able to handle arbitrarily shaped discontinuity without any remeshing. Our approach is shown to significantly improve the alignment of intraoperative MRI. [less ▲]

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See detail3D-Characterization of the veneer-zirconia interface using FIB nano-tomography.
MAINJOT, Amélie ULg; Douillard, Thierry; Gremillard, Laurent et al

in Dental materials : official publication of the Academy of Dental Materials (2013), 29(2), 157-65

OBJECTIVES: The phenomena occurring during zirconia frameworks veneering process are not yet fully understood. In particular the study of zirconia behavior at the interface with the veneer remains a ... [more ▼]

OBJECTIVES: The phenomena occurring during zirconia frameworks veneering process are not yet fully understood. In particular the study of zirconia behavior at the interface with the veneer remains a challenge. However this interface has been reported to act on residual stress in the veneering ceramic, which plays a significant role in clinical failures such as chipping. The objective of this study was thus to investigate the veneer-zirconia interface using a recent 3D-analysis tool and to confront these observations to residual stress measurements in the veneering ceramic. METHODS: Two cross-sectioned bilayered disc samples (veneer on zirconia), exhibiting different residual stress profiles in the veneering ceramic, were investigated using 2D and 3D imaging (respectively Scanning Electron Microscopy (SEM) and Focused Ion Beam nanotomography (FIB-nt), associated with chemical analysis by Energy Dispersive X-ray Spectroscopy (EDS). RESULTS: The observations did not reveal any structural change in the bulk of zirconia layer of both samples. However the presence of structural alterations and sub-surface microcracks were highlighted in the first micrometer of zirconia surface, exclusively for the sample exhibiting interior tensile stress in the veneering ceramic. No interdiffusion phenomena were observed. SIGNIFICANCE: FIB nanotomography was proven to be a powerful technique to study the veneer-zirconia interface. The determination of the origin and the nature of zirconia alterations need to be further studied. The results of the present study support the hypothesis that zirconia surface property changes could be involved in the development of tensile stress in the veneering ceramic, increasing the risk of chipping. [less ▲]

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See detail3D-reconstruction and overall topology of the dimeric mitochondrial ATP synthase of the colorless alga Polytomella sp
González-Halphen, Diego; Vázquez-Acevedo, Myriam; Cano-Estrada, Araceli et al

in Biochimica et Biophysica Acta (BBA) - Bioenergetics (2010, July), 1797(Supplement 1), 32

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See detailLa 3D. Chronique de quelques révolutions.
Hamers, Jérémy ULg

Conference given outside the academic context (2013)

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See detail[3H]-Lysine-tetrodotoxin
Grandfils, Christian ULg

in Janssen Chimica Acta (1986), 4

Tetrodoxin (TTX), a heterocyclic toxin isolated for the first time from the puffer fish, is well known as a highly specific and sensitive Na-channel marker. Its use in electrophysiological studies has ... [more ▼]

Tetrodoxin (TTX), a heterocyclic toxin isolated for the first time from the puffer fish, is well known as a highly specific and sensitive Na-channel marker. Its use in electrophysiological studies has provided a lot of information about the action potential and, more specifically, about the activity of sodium channels. [less ▲]

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See detail3ième Université d'Eté du Conseil Francophone
Kohl, Benoît ULg; Culot, André; Aughuet, Charlotte et al

Diverse speeche and writing (2009)

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See detailThe 3nu3 bands of isotopic ozone 668 and 686
Chichery, A.; Barbe, Alain; Bourgeois, M.T. et al

in Atmospheric Spectroscopy Applications 1999 - Proceedings (1998)

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See detail3rd Euregio Skin Pathology Meeting
Frank, J.; Nikkels, Arjen ULg; Rübben, A.

in Dermatologie actualité (2006), 96

The "Euregio Skin Pathology Meetings" were started as an initiative to permit exchanges in both scientific and clinical dermatology and dermatopathology between the Universities of the Euregio region ... [more ▼]

The "Euregio Skin Pathology Meetings" were started as an initiative to permit exchanges in both scientific and clinical dermatology and dermatopathology between the Universities of the Euregio region, including Aachen, Hasselt, Liège, and Maastricht. These meetings are held under the auspices of the organising University and the Euregio Executive Commitee. The first two meetings were held in Liège and Aachen, respectively. The third "Euregio Skin Pathology Meeting" was organised in Maastricht last October by the dermatology department of Professor Steijlen. The abstracts of this meeting are presented below, underlining the various domains of interests of our respective departments, illustrating both ongoing research projects as well as special clinical developments. [less ▲]

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See detail3{sigma} hard sample of XMDS survey (Tajer+, 2007)
Tajer, M.; Polletta, M.; Chiappetti, L. et al

Textual, factual or bibliographical database (2007)

Our goal is to probe the populations of obscured and unobscured AGN investigating their optical-IR and X-ray properties as a function of X-ray flux, luminosity and redshift within a hard X-ray selected ... [more ▼]

Our goal is to probe the populations of obscured and unobscured AGN investigating their optical-IR and X-ray properties as a function of X-ray flux, luminosity and redshift within a hard X-ray selected sample with wide multiwavelength coverage. We selected a sample of 136 X-ray sources detected at a significance of >=3{sigma} in the 2-10keV band (F[SUB]2-10[/SUB]>~10[SUP]-14[/SUP]erg/cm[SUP]2[/SUP]/s) in a ~1deg[SUP]2[/SUP] area in the XMM Medium Deep Survey (XMDS, Cat. ). The XMDS area is covered with optical photometry from the VVDS and CFHTLS surveys and infrared Spitzer data from the SWIRE survey. Based on the X-ray luminosity and X-ray to optical ratio, 132 sources are likely AGN, of which 122 have unambiguous optical - IR identification. The observed optical and IR spectral energy distributions of all identified sources are fitted with AGN/galaxy templates in order to classify them and compute photometric redshifts. X-ray spectral analysis is performed individually for sources with a sufficient number of counts and using a stacking technique for subsamples of sources at different flux levels. Hardness ratios are used to estimate X-ray absorption in individual weak sources. (1 data file). [less ▲]

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See detail4 syllabi de didactique des mathématiques - première et deuxième années du normal primaire (Géométrie, numération)
Deber, Bruno; Jancart, Sylvie ULg; Goossens, Cécile

Learning material (2008)

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See detail4 YEARS RESEARCH ON THE REPRODUCTIVE-BEHAVIOR AND HYBRIDIZATION OF BARBUS-BARBUS AND BARBUS-MERIDIONALIS
Poncin, Pascal ULg

in Bulletin Français de la Pêche et de la Pisciculture (1994), 334

This paper reviews the main results of 4 years studies on the reproductive behaviour of Barbus barbus (L., 1758) and Barbus meridionalis (Risso, 1826) under controlled conditions in aquarium. The ... [more ▼]

This paper reviews the main results of 4 years studies on the reproductive behaviour of Barbus barbus (L., 1758) and Barbus meridionalis (Risso, 1826) under controlled conditions in aquarium. The reproductive behaviour is described as well as the behavioural mechanisms of hybridization. During the spawning act - sometimes preceded by <<forehead swim>> in which two fish swim together, at high speed, head against head the female and the few accompanying males rise from the gravel and move their genital papilla in the gravel while releasing ova or sperm (fig. 1 and 2). The reproductive behaviours of Barbus barbus and Barbus meridionalis appear to be similar and hybridizations were observed, showing that no complete behavioural barrier blocks the mating of the two species (fig. 2). The daily rhythms of activity are compared within the two species. The influence of temperature and daylength on the daily rhythms of activity is discussed. in winter conditions, barbels exhibit a night activity rhythm. Spawning occurs during daytime or during the night (fig. 3). The influence of spawning stimuli is analysed using dummies of different sizes and colors (photo I). Barbels seem to prefer white, grey, yellow and brown colors to red or black colors. [less ▲]

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See detail[4+2] Cycloaddition of 1-phosphono-1,3-butadiene with azo- and nitroso-heterodienophiles
Monbaliu, Jean-Christophe ULg; Marchand-Brynaert, Jacqueline

in Tetrahedron Letters (2008), 49

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See detailA 4,103 marker integrated physical and comparative map of the horse genome.
Raudsepp, T; Gustafson-Seabury, A; Durkin, Keith ULg et al

in Cytogenetic & Genome Research (2008), 122

A comprehensive second-generation whole genome radiation hybrid (RH II), cytogenetic and comparative map of the horse genome (2n = 64) has been developed using the 5000rad horse × hamster radiation hybrid ... [more ▼]

A comprehensive second-generation whole genome radiation hybrid (RH II), cytogenetic and comparative map of the horse genome (2n = 64) has been developed using the 5000rad horse × hamster radiation hybrid panel and fluorescence in situ hybridization (FISH). The map contains 4,103 markers (3,816 RH; 1,144 FISH) assigned to all 31 pairs of autosomes and the X chromosome. The RH maps of individual chromosomes are anchored and oriented using 857 cytogenetic markers. The overall resolution of the map is one marker per 775 kilobase pairs (kb), which represents a more than five-fold improvement over the first-generation map. The RH II incorporates 920 markers shared jointly with the two recently reported meiotic maps. Consequently the two maps were aligned with the RH II maps of individual autosomes and the X chromosome. Additionally, a comparative map of the horse genome was generated by connecting 1,904 loci on the horse map with genome sequences available for eight diverse vertebrates to highlight regions of evolutionarily conserved syntenies, linkages, and chromosomal breakpoints. The integrated map thus obtained presents the most comprehensive information on the physical and comparative organization of the equine genome and will assist future assemblies of whole genome BAC fingerprint maps and the genome sequence. It will also serve as a tool to identify genes governing health, disease and performance traits in horses and assist us in understanding the evolution of the equine genome in relation to other species. [less ▲]

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See detail4-[18F]Fluorotropapride, a specific D2 receptor ligand for PET.
Damhaut, Ph.; Cantineau, R.; Lemaire, Christian ULg et al

in Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine (1991), 32

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