References of "2012"
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See detailUsing ghost rock weathering as a new tool for quarry management
Fischer, Valentin ULiege; Vergari, Anne

Conference (2012, October)

Although karstic weathering (sensu lato) is a major concern for the exploitation of limestone quarries, the importance, spatial extension, and intensity of this natural phenomenon are rarely investigated ... [more ▼]

Although karstic weathering (sensu lato) is a major concern for the exploitation of limestone quarries, the importance, spatial extension, and intensity of this natural phenomenon are rarely investigated because of the lack of applicable technique to assess these variables other than subsurface geophysical exploration methods. Here, we propose to use the intrinsic property of ghost-rock weathering, tectonic control, to predict the degree and type of weathering of the reserve of two contiguous limestone quarries in the Tournai area (western Belgium). First, we revised the macrotectonic setting of these quarries, creating five tectonic entities. Then, we built an extensive fracture database (1357 ‘events’), recording fracture direction, dip, width, height, mineralization, and weathering. Then, we calculated a “Sterile Index” that is a simple function of the relative occurrence and mean width of karstified fractures. The rose diagrams of fracture orientations are contrasted between tectonic entities and so are the intensity and the dominant type of weathering: tectonic entities with widely dispersed fracture directions are significantly more weathered than entities with narrowly dispersed rose diagrams. Preliminary tests indicate fracture orientation and weathering are consistent within the tectonic entities, allowing extrapolation to quarries reserves. Ultimately, this technique can be used to predict the rock waste volume of the quarries reserves (when combined with geophysical exploration methods) and manage the development of the quarries accordingly. [less ▲]

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See detailMultiwavelength Observations of Gamma-ray Binary Candidates
McSwain, M.V.; Chernyakova, M.; Malishev, D. et al

in 2012 Fermi Symposium proceedings - eConf C121028 (2012, October)

There are currently only six known high mass X-­‐ray binaries (HMXBs) that also exhibit MeV, GeV, and/or TeV emission ("gamma-­‐ray binaries"). Expanding the sample of gamma-­‐ray binaries and identifying ... [more ▼]

There are currently only six known high mass X-­‐ray binaries (HMXBs) that also exhibit MeV, GeV, and/or TeV emission ("gamma-­‐ray binaries"). Expanding the sample of gamma-­‐ray binaries and identifying unknown Fermi sources are currently of great interest to the community. Based upon their positional coincidence with the unidentified Fermi sources 1FGL J1127.7-­‐6244c and 1FGL J1808.5-­‐1954c, the Be stars HD 99771 and HD 165783 have been proposed as gamma-­‐ray binary candidates. During Fermi Cycle 4, we have performed multiwavelength observations of these sources using XMM-­‐Newton and the CTIO 1.5m telescope. We do not confirm high energy emission from the Be stars. Here we examine other X-­‐ray sources in the X-­‐ray sources in the field of view that are potential counterparts to the Fermi sources. [less ▲]

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See detailTADAM L’avis des usagers non inclus dans le traitement par héroïne
Magoga, Cécile; Demaret, Isabelle ULiege

Conference (2012, October)

Introduction : Le projet TADAM, une étude contrôlée randomisée, comparait un nouveau traitement assisté par héroïne avec des traitements existants par méthadone à Liège, en Belgique. Nous avons réalisé ... [more ▼]

Introduction : Le projet TADAM, une étude contrôlée randomisée, comparait un nouveau traitement assisté par héroïne avec des traitements existants par méthadone à Liège, en Belgique. Nous avons réalisé une étude qualitative sur l'attitude des personnes dépendantes de l'héroïne envers ce type de projet, ainsi que sur l'attitude des intervenants d'institutions de soins travaillant avec ces personnes Méthode : Avant qu'un patient ne soit inclus dans le projet TADAM, il lui était demandé d'expliquer pourquoi il souhaitait rentrer en traitement (n=80). Des interviews ont également été réalisées auprès de consommateurs d'héroïne non inclus dans le projet, avant la période d'inclusion (n=65), au milieu de celle-ci (n=30) et dans ses derniers mois (n=23). Pendant le projet, des interviews ont également été réalisées auprès d'intervenants travaillant dans des institutions de soins pour personnes dépendantes de substances, soit de manière individuelle (n=10), soit en groupe (n=6) pour connaître leur attitude face au projet TADAM. Résultats : De nombreux patients souhaitaient rentrer dans ce projet pour améliorer leurs conditions de vie. La raison principale de ne pas rentrer dans ce type de traitement était la peur de devenir plus dépendant. Cette raison était renforcée par le fait que le traitement par héroïne proposé ne durait que 12 mois et les patients s'inquiétaient de leur situation après ce traitement : ils avaient peur d'être plus dépendants et donc dans une situation plus difficile qu'avant le traitement. L'attitude des intervenants étaient plutôt favorable mais prudente. Conclusion : Contrairement aux craintes préalables, les usagers d'héroïne ne se précipitent pas en masse et sans réfléchir vers un traitement assisté par héroïne. Certains réfléchissent longtemps avant de s'y engager. Une information précise et un traitement sans durée minimum sont nécessaires. [less ▲]

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See detailA comparative study of sexual product quality in F1 hybrids of the bream Abramis brama X the silver bream Blicca bjoerkna
Nzau Matondo, Billy ULiege; Ovidio, Michaël ULiege; Philippart, Jean-Claude ULiege et al

in Fisheries Science (2012), 78

The gonadosomatic index at spawning, absolute fecundity, and egg size for the female sexual products as well as the density and consistency of semen for the male sexual products were examined in cultured ... [more ▼]

The gonadosomatic index at spawning, absolute fecundity, and egg size for the female sexual products as well as the density and consistency of semen for the male sexual products were examined in cultured Abramis brama 9 Blicca bjoerkna F1 hybrids and compared with the parental species at their first sexual maturity. Females ovulated under environmental conditions, and their eggs were weighed, counted and measured. Semen of males was macroscopically examined and spermatozoa counted using a hemocytometer. Results revealed that hybridization affected the quality of female and male gametes but with an overlap between hybrids and parents. The gonadosomatic index and fecundity were significantly lower than those of parental species. Egg sizes in hybrids showed a parental effect but to the benefit of hybrids. Semen of hybrids was more diluted which was classified into two groups: the white semen overlapping slightly with parents and the aqueous without any overlap with parents. Overlapped areas between hybrids and parents in term of quality of sexual products could translate that females and males of these hybrids have the biological capacity to produce high quality gametes and thus, a greater chance to produce F2 and backcross generations in rivers. [less ▲]

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See detailEUV high resolution imager on-board Solar Orbiter: optical design and detector performances.
Halain, Jean-Philippe ULiege; Mazzoli, Alexandra ULiege; Rochus, Pierre ULiege et al

Poster (2012, October)

The EUV high resolution imager (HRI) channel of the Extreme Ultraviolet Imager (EUI) on-board Solar Orbiter will observe the solar atmospheric layers at 17.4 nm wavelength with a 200 km resolution. The ... [more ▼]

The EUV high resolution imager (HRI) channel of the Extreme Ultraviolet Imager (EUI) on-board Solar Orbiter will observe the solar atmospheric layers at 17.4 nm wavelength with a 200 km resolution. The HRI channel is based on a compact two mirrors off-axis design. The spectral selection is obtained by a multilayer coating deposited on the mirrors and by redundant Aluminum filters rejecting the visible and infrared light. The detector is a 2k x 2k array back-thinned silicon CMOS-APS with 10 µm pixel pitch, sensitive in the EUV wavelength range. Due to the instrument compactness and the constraints on the optical design, the channel performance is very sensitive to the manufacturing, alignments and settling errors. A trade-off between two optical layouts was therefore performed to select the final optical design and to improve the mirror mounts. The effect of diffraction by the filter mesh support and by the mirror diffusion has been included in the overall error budget. Manufacturing of mirror and mounts has started and will result in thermo-mechanical validation on the EUI instrument structural and thermal model (STM). Because of the limited channel entrance aperture and consequently the low input flux, the channel performance also relies on the detector EUV sensitivity, readout noise and dynamic range. Based on the characterization of a CMOS-APS back-side detector prototype, showing promising results, the EUI detector has been specified and is under development. These detectors will undergo a qualification program before being tested and integrated on the EUI instrument. [less ▲]

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See detailDevelopment of a quantitative approach to measure phospholipids in dried drops by Raman spectroscopy
Malherbe, Cédric ULiege; Jadoul, Laure; Gilbert, Bernard ULiege et al

Poster (2012, October)

We present here the results obtained during our tentative to analyse quantitatively dried drops of phospholipidic solutions by Raman spectroscopy. Drops of different solutions of phospholipid were deposed ... [more ▼]

We present here the results obtained during our tentative to analyse quantitatively dried drops of phospholipidic solutions by Raman spectroscopy. Drops of different solutions of phospholipid were deposed onto different material supports. The spots were then analyses by confocal Raman microspectroscopy. Experimental settings have been optimised and the analysis of the intensity profile of the Raman signal inside the spot allows the establishment of a calibration curve for the determination of the phospholipids amount within a 1 µL solution. [less ▲]

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See detailL’État et la gestion de la grippe A(H1N1)
Rossignol, Nicolas ULiege; Thoreau, François ULiege

in Revue Nouvelle (2012), 10

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See detailApplication of a new thermo-mechanical model for the study of the nuclear waste disposal in clay rocks
Dizier, A.; François, B.; Collin, Frédéric ULiege et al

Poster (2012, October)

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See detailA large-scale gas injection test in the Meuse/Haute-Marne research laboratory: data analysis and numerical approach
de La Vaissière, R.; Gerard, Pierre ULiege; Radu, Jean-Pol ULiege et al

Conference (2012, October)

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See detailPoly-SiGe-based MEMS Xylophone Bar Magnetometer
Rochus, Véronique; Jansen, R.; Tilmans, H. A. C. et al

in IEEE SENSORS 2012 (2012, October)

This paper presents the design, fabrication and preliminary characterization of highly sensitive MEMS-based Xylophone Bar Magnetometers (XBMs) realized in imec’s poly-SiGe MEMS technology. Key for our ... [more ▼]

This paper presents the design, fabrication and preliminary characterization of highly sensitive MEMS-based Xylophone Bar Magnetometers (XBMs) realized in imec’s poly-SiGe MEMS technology. Key for our Lorentz force driven capacitively sensed resonant sensor are the combination of reasonably high Q-factor and conductivity of imec’s poly-SiGe, our optimized multiphysics sensor design targeting the maximization of the Q-factor in a wide temperature range as well as our proprietary monolithic above-CMOS integration and packaging schemes. Prototypes 3-axis devices were fabricated and characterized. We present optical vibrometer and electrical S-parameter measurements of XBMs performed in vacuum with a reference magnet at increasing sensor separation. The optical oscillation amplitude is well correlated with the magnetic field amplitude. The electrical 2-port measurements, 1st port as Lorentz force actuator and 2nd port as capacitive sensor, also reproduces the designed magnetic field dependence. This opens the way towards the on-chip integration of small footprint extremely sensitive magnetometers. [less ▲]

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See detailMaths & Manips pour le primaire. Favoriser l'apprentissage des grandeurs par des manipulations
Guissard, Marie-France; Henry, Valérie ULiege; Vansimpsen, Sylvie et al

Conference (2012, October)

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See detailLittle by Little. Expansions of Nanoscience and Emerging Technologies
van Lente, Harro; Coenen, Christopher; Fleischer, Torsten et al

Book published by IOS Press (2012)

Little by little, nanotechnology has emerged amid enormous anticipations and fantastic promises of new materials, aspiring to manipulate our world “atom by atom.” While these grand visions continue to ... [more ▼]

Little by little, nanotechnology has emerged amid enormous anticipations and fantastic promises of new materials, aspiring to manipulate our world “atom by atom.” While these grand visions continue to capture the imaginations of various audiences—and continue to be contested, as well—nanotechnology has developed into more than that. During the last two decades, many research programs and industrial R&D expenditures have resulted in actual products and tangible innovations. Nanotechnology, it seems, is expanding. But what does it mean to say that nanotechnology is expanding? [less ▲]

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See detailEcheveau des tropismes. Eugène Savitzkaya et la littérature à Liège dans les années 1980
Demoulin, Laurent ULiege

in Art&Fact (2012), 31

Les nombreux écrivains liégeois des années 1980 sont envisagés à partir de la théorie des trois phases de l'histoire de la littérature belge selon Jean-Marie Klinkenberg. La seconde partie de l'article se ... [more ▼]

Les nombreux écrivains liégeois des années 1980 sont envisagés à partir de la théorie des trois phases de l'histoire de la littérature belge selon Jean-Marie Klinkenberg. La seconde partie de l'article se penche sur le cas particulier d'Eugène Savitzkaya. [less ▲]

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See detailGCxGC-TOFMS for VOC Analyses: Forensic and Medical Applications
Focant, Jean-François ULiege

Conference (2012, October)

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See detailTendinopathies et plasma riche en plaquettes : applications cliniques
Kaux, Jean-François ULiege

in 5ème Congrès Commun SFMES & SFTS (2012, October)

Les lésions tendineuses représentent au sein d’une population sportive ou de travailleurs de force une proportion élevée des lésions de surcharge. Leur incidence atteint 30% des pathologies musculo ... [more ▼]

Les lésions tendineuses représentent au sein d’une population sportive ou de travailleurs de force une proportion élevée des lésions de surcharge. Leur incidence atteint 30% des pathologies musculo-squelettiques ; la douleur limite régulièrement les capacités fonctionnelles et athlétiques (1). Actuellement, ces tendinopathies demeurent un défi thérapeutique car certaines évoluent selon un mode désespérément chronique en raison de leur caractère rebelle aux différentes thérapeutiques conservatrices classiques (anti-inflammatoires, rééducation, ondes de choc...). Les infiltrations de plasma riche en plaquettes (PRP) pourraient représenter une alternative espoir thérapeutique suite aux résultats de diverses expérimentations in vitro et animales (2). Les résultats favorables relatés par les médias sportifs contrastent parfois singulièrement avec les études cliniques. Le PRP ne figure plus sur la liste des produits dopants depuis janvier 2011 (www.wada-ama.org) contrairement aux produits sanguins labiles (3).Cette revue actualise le traitement des lésions tendineuses (épicondylite, tendinopathies de coiffe, patellaire et calcanéenne) ainsi que les fasciites plantaires par plasma riche en plaquettes (3). Etant donné le caractère récent de ce traitement dans le domaine médico-sportif, les études cliniques réalisées à ce jour n’ont pas confirmé les effets bénéfiques obtenus in vitro. Certaines études démontrent une amélioration de la symptomatologie suite au traitement par PRP, mais d’autres études apparaissent contradictoires. Cependant, il est communément admis qu’après l’infiltration, une (auto-)rééducation excentrique sous-maximale progressive améliore la qualité de la cicatrisation tendineuse. Le PRP initie un processus cicatriciel, secondairement développé par le vecteur des forces excentriques (4). L’avenir du PRP nécessite une standardisation de la procédure de recueillement permettant d’éviter la collecte des globules rouges et blancs pouvant être délétères au processus cicatriciel (chaque technique produit un PRP différent (5)), ainsi que la réalisation de protocoles standardisés permettant de comparer les futurs travaux. De plus, le type de tendon exercerait-il un effet sur la réponse de guérison ? Celle-ci serait-elle différente entre certains tendons volumineux (calcanéen, patellaire) et les autres (épicondyliens, coiffe des rotateurs...) ? Références: Kaux et al. Current opinion on tendinopathy. Journal of Sports Sciences and Medicine, 2011; 10:238-253. Kaux et al. Effects of platelet-rich plasma (PRP) on the healing of Achilles tendons of rats. Wound Repair and Regeneration, 2012 ; 5: 748-756. Smets et al. Applications cliniques du plasma riche en plaquettes (PRP) dans les lésions tendineuses : revue de la littérature. Science & Sport, 2012; 27:141-153 Kaux et al. Eccentric training improves tendon biomechanical properties: a rat model. Journal of Orthopaedic Research, 2012; DOI: 10.1002/jor.22202 Kaux et al. Etude comparative de cinq techniques de préparation plaquettaire (platelet-rich plasma). Pathologie-Biologie, 2011; 59: 157-160. Plus de références sur orbi.ulg.ac.be [less ▲]

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See detailParenteral nutrition in premature infants, is there a place for a standardized industrialized parenteral nutrition solution
SENTERRE, Thibault ULiege

in 4th Congress of the European Academy of Paediatric Societies (2012, October)

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See detailNonlinear Dynamic Analysis of Aerospace Structures
Kerschen, Gaëtan ULiege; Noël, Jean-Philippe ULiege; Renson, Ludovic ULiege et al

Conference (2012, October)

Current practice in industry is to rely on linear finite element simulations. However, nonlinearity is a frequent occurrence in engineering structures. It is at the origin of rich and complex dynamical ... [more ▼]

Current practice in industry is to rely on linear finite element simulations. However, nonlinearity is a frequent occurrence in engineering structures. It is at the origin of rich and complex dynamical phenomena that cannot be observed in linear structures. Solving both the direct and inverse problems in nonlinear structural dynamics therefore warrants the development of appropriate methodologies. The focus of the presentation will first be on the inverse problem. We will describe the different steps of the nonlinear system identification process and discuss the current capabilities of existing methods. The presentation will then address the direct problem during which the identified model is used for accurately predicting the structure’s dynamic characteristics. A rigorous nonlinear extension of modal analysis will be presented, and we will show that it represents a very useful framework for understanding nonlinear dynamical phenomena and supporting design decisions. Two real-life aerospace structures will be considered for illustrating the proposed developments. [less ▲]

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See detailEffect of finger tapping frequency on abnormal subthalamic nucleus oscillations in Parkinson’s disease
Stamatakis, Julien; Noirhomme, Quentin ULiege; Orban, Jonhatan et al

Poster (2012, October)

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See detailCumulative Time in Band (cTIB): Glycemic Level, Variability and Patient Outcome All in 1
Penning, Sophie ULiege; Signal, Matthew; PREISER, Jean-Charles ULiege et al

in Intensive Care Medicine (2012, October), 38 (Suppl 1)

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