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See detailFunctional ANOVA with random functional effects: an application to event-related potentials modelling for electroencephalograms analysis
Bugli, Céline; Lambert, Philippe ULg

in Statistics in Medicine (2006), 25

The di erential e ects of basic visual or auditory stimuli on electroencephalograms (EEG), named event related potentials (ERPs), are often used to evaluate the impact of treatments on brain performances ... [more ▼]

The di erential e ects of basic visual or auditory stimuli on electroencephalograms (EEG), named event related potentials (ERPs), are often used to evaluate the impact of treatments on brain performances. In the present paper, we propose a P-splines based model that can be used to evaluate treatment e ect on the timing and the amplitude of some peaks of the ERPs curves. Functional ANOVA is an adaptation of linear model or analysis of variance to analyse functional observations. The changes in the functional of interest e ects are generally described using smoothing splines. Eilers and Marx proposed to work with P-splines, a combination of B-splines and di erence penalties on coe cients. We de ne a Psplines model for ERPs curves combined with random e ects. In particular, we show that it is a useful alternative to classical strategies requiring the visual and usually imprecise localization of speci c ERP peaks from curves with a low signal-to-noise ratio. [less ▲]

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See detailThe dynamics of the guests in filled germanium clathrates
Hermann, Raphaël ULg; Grandjean, Fernande ULg; Keppens, V. et al

in Mater. Res. Soc. Symp. Proc. Vol. 886 (2006)

In the filled gallium-germanium clathrates, R8Ga16Ge30, where R is Ba, Sr, or Eu, the guests are located in two large cages and are weakly bound to the crystalline clathrate framework. The caged guests ... [more ▼]

In the filled gallium-germanium clathrates, R8Ga16Ge30, where R is Ba, Sr, or Eu, the guests are located in two large cages and are weakly bound to the crystalline clathrate framework. The caged guests exhibit a localized "rattling" vibrational mode that provides an efficient mechanism for reducing the thermal conductivity. Inelastic neutron scattering and nuclear inelastic scattering measurements have yielded the phonon density of states in R8Ga16Ge30; the line width of the localized vibrational modes is found to be an important parameter in determining the lattice thermal conductivity. Neutron diffraction studies on R8Ga16Ge30 have shown that the guests in the larger cage are located off-center, and it was proposed that their jumping about the four off-center locations is responsible for the observed glass-like thermal conductivity at temperatures below 10 K. The detection of such slow guest motion is challenging because the typical time and energy scales involved are ca. 4 ns and 1 mu eV, respectively. We have studied the slow europium tunneling dynamics in Eu4Sr4Ga16Ge30 by both Mossbauer and microwave absorption spectroscopy. [less ▲]

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See detailPlasma concentrations of myeloperoxidase in endurance and 3-day event horses after a competition
Art, Tatiana ULg; Franck, Thierry ULg; Gangl, M. et al

in Equine Veterinary Journal. Supplement (2006), 36

REASON FOR PERFORMING STUDY: In man, exercise of any type has been shown to induce neutrophil degranulation and respiratory burst activity, as well as an increase in plasma myeloperoxidase (MPO), a ... [more ▼]

REASON FOR PERFORMING STUDY: In man, exercise of any type has been shown to induce neutrophil degranulation and respiratory burst activity, as well as an increase in plasma myeloperoxidase (MPO), a specific enzyme of neutrophil azurophilic granules with a strong oxidative activity. Until now, it is not known whether this is the same in horses. OBJECTIVES: To study whether degranulation of blood neutrophils may be induced by exercise by measuring the total concentration of MPO and assess the possible influence of type of competition on this exercise-induced adjustment. METHODS: Blood was sampled before, and 30 min after, the course, in 9 ponies performing the Phase D of a national 3-day event championship (CIC*), and in 7 endurance horses participating at the European endurance championship 2005. White blood cells and granulocytes, total plasma proteins, creatine phosphokinase (CK), and total MPO contents were determined from blood samples. In addition, blood was taken from all ponies and 4 of the endurance horses 5 min after completion of the course to give some idea of the intensity of exercise. RESULTS: The mean blood lactate was 15.8 +/- 5.8 mmol/l after the CIC* and 2.7 +/- 0.2 mmol/l after the 160 km course. Performing both competitions induced a significant increase in CK and MPO. After the endurance course, the number of granulocytes significantly increased. Whilst there was no significant correlation between the measurements in CIC* ponies, MPO was significantly correlated with granulocyte count (r2 = 0.776) and CK (r2 = 0.586) in endurance horses. CONCLUSIONS: Intense exercise induces an activation of blood granulocytes, with degranulation of neutrophils and release of MPO. The plasmatic MPO concentration after endurance was higher than the values reported in some inflammatory pathological conditions. POTENTIAL RELEVANCE: This phenomenon may partly contribute to the occurrence of an exercise-induced oxidative stress and to the alteration of muscular membrane permeability. Further studies should be conducted to assess the possible relationship between MPO concentration and markers of oxidative stress in performance horses [less ▲]

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See detailA viscoelastic formulation for finite strains: application to brain soft tissues
FANCELLO, E.; Ponthot, Jean-Philippe ULg; VIGNERON, L. et al

in Proceedings of XXVII CILAMCE – Iberian Latin American Congress on Computational Methods in Engineering (2006)

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See detailFUNCTIONALITY OF SYNTHETIC POLYCATIONS FOR THE MASKING OF ANTIGENIC SITES BY MEANS OF OPTICAL METHODS
Relancio, MF; Riquelme, B; Dumas, D et al

in Proceeding of the 91st Annual Meeting of the Argentine Physics Association (2006)

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See detailMorphological quantification of bone scaffolds with µCT
Kerckhofs, Greet ULg; Schrooten, Jan; Van Cleynenbreugel, T. et al

Conference (2006)

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See detailEtude des protéines totales et de l’ADN issus des feuilles de Moricandia arvensis collectées de quatre régions du sud tunisien
Hasnaoui, Nejib ULg; Daly, Dalia; Haj Khelil, Amel et al

in Revue des Régions Arides (2006)

A partir des protéines et de l'ADN extraits des feuilles de Moricandia arvensis, collectées de quatre régions du sud tunisien, nous avons étudié la variabilité de cette plante reconnue pour ses vertus ... [more ▼]

A partir des protéines et de l'ADN extraits des feuilles de Moricandia arvensis, collectées de quatre régions du sud tunisien, nous avons étudié la variabilité de cette plante reconnue pour ses vertus médicinales. Nous avons analysé d’une part les protéines totales extraites puis séparées par la technique SDS-PAGE. Cette méthode a révélé un degré de similitude très remarquable entre les plantes issues des quatre régions et qui varie entre 0.77 et 0.91. Nous avons effectué d’autre part, une analyse de la variabilité génétique par l’amplification aléatoire de l'ADN polymorphe par la technique PCR-RAPD en utilisant trois amorces différentes. Nous avons remarqué que la similitude est plus accentuée entre les plantes collectées des régions du Sud Ouest, avec un degré de similitude pouvant atteindre 100%. Celles issues du Sud Est présentent un degré de similitude de 66%. [less ▲]

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See detailThe accuracy of memory for faces of personally known individuals
Brédart, Serge ULg; Devue, Christel ULg

in Perception (2006), 35(1), 101-106

The present study was aimed at evaluating whether the very high accuracy of memory for familiar faces, demonstrated by Ge et al (2003, Perception 32 601-614) with a very familiar famous person ... [more ▼]

The present study was aimed at evaluating whether the very high accuracy of memory for familiar faces, demonstrated by Ge et al (2003, Perception 32 601-614) with a very familiar famous person, generalises to faces of personally known individuals. The accuracy of participants' perceptual memory for a close colleague's face and for their own face was evaluated by presenting original and manipulated pictures of these two targets. The manipulation consisted of increasing or decreasing the interocular distance. As in Ge et al's study, results indicated that proportions of correct recognition of the original faces, and just noticeable differences for the detection of alterations in the recognition task, were not significantly different from the corresponding measures in a perceptual discrimination task performed by a sample of participants who did not know the target persons at all. High accuracy of memory generalises to faces of personally known individuals [less ▲]

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See detailNon-infusional vs intravenous consolidation chemotherapy in eldery patients with acute myeloid leukemia : final results of th EORTC-GIMAMA AML-13 randomized phase III trial
Jehn, U.; Suciu, S.; Thomas, X. et al

in Leukemia : Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K (2006), 20

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See detailBulletin de la Commission royale pour la publication des Anciennes Lois et Ordonnances de Belgique
Marchandisse, Alain ULg

Book published by Ministère de la Justice (2006)

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See detailSimulation of thixoforming: comparison of different constitutive equations
Pierret, Jean-Christophe ULg; Rassili, Ahmed ULg; Cezard, Pierre

in Solid State Phenomena (2006), 116-117

The behaviour of the semi-solid material is complex to simulate and many approaches are proposed in the literature to represent it. In this work, different constitutive equations are studied: the ... [more ▼]

The behaviour of the semi-solid material is complex to simulate and many approaches are proposed in the literature to represent it. In this work, different constitutive equations are studied: the classical Northon-Hoff law, Joly and Merhabian's one [1] and an innovative micromechanical model using homogenisation technique [2]. These constitutive equations have been implemented in the FE code Forge2 (R) to simulate simple forming tests, such as compression and direct extrusion. The load-displacement curves using the three constitutive equations are compared in order to estimate their capabilities. [less ▲]

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See detailCytokine and chemokine expression in canine sino-nasal aspergillosis and idiopathic lymphoplasmacytic rhinosinusitis.
Peeters, Dominique ULg; Peters, I. R.; Helps, C. et al

in Proceedings of the 16th Annual Congress of the ECVIM-CA (2006)

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See detailFréquence et importance du charriage dans les rivières du massif ardennais
Houbrechts, Geoffrey ULg; Hallot, Eric ULg; Gob, F. et al

in Géographie physique et Quaternaire (2006), 60(3), 247-258

Le transport de la charge de fond de plusieurs rivières du massif ardennais (Belgique) a été analysé grâce à différentes techniques de marquage de galets (peinture, charge métallique, émetteurs radio ... [more ▼]

Le transport de la charge de fond de plusieurs rivières du massif ardennais (Belgique) a été analysé grâce à différentes techniques de marquage de galets (peinture, charge métallique, émetteurs radio). Ces rivières possèdent un bassin versant dont la taille est comprise entre 0,3 et 2700 km². Les observations ont permis de mettre en évidence le débit à partir duquel débute le charriage. Pour des rivières importantes (bassin versant supérieur à 500 km²), cette mise en mouvement se produit pour des débits légèrement inférieurs au débit à plein bord (0,7 à 1 Qb), débits qui se présentent en moyenne 5 à 11 jours par an. Dans les rivières ardennaises de taille intermédiaire (bassin versant compris entre 100 et 500 km²), on constate que le charriage débute pour un débit proche de 0,5 fois le débit à plein bord, avec des récurrences de l’ordre de 0,3 an et une durée de charriage variant entre 8 et 12 jours par an. Dans les rivières de dimension modeste (bassin versant inférieur à 100 km²), il apparaît que la mise en mouvement de la charge de fond se produit pour des débits compris entre 0,5 et 0,8 Qb, mais la récurrence de ces débits est relativement faible et le charriage peut se produire jusqu’à 20 jours par an. Par ailleurs, le transport solide par charriage a été évalué à l'aide de pièges à sédiments dans les rivières de petite dimension (bassin versant inférieur à 10 km²) ; il est relativement peu important dans les bassins forestiers (de l'ordre de 0,5 t.km-².an-1), notamment en raison de la multiplication des embâcles végétaux qui accroissent la rugosité et provoquent une forte dissipation d'énergie. Dans les rivières plus importantes, le transport solide a été estimé entre 0,4 et 2,5 t.km-².an-1 grâce à l'analyse des quantités curées systématiquement aux mêmes sites et à la réalisation de levés topographiques de contrôle. Nous avons ensuite analysé l’évolution des quantités charriées en fonction de la puissance spécifique au plein bord développée par ces rivières. La relation établie sur la base de ces données a permis de mettre en évidence le déficit en sédiments de certaines rivières ainsi que plusieurs facteurs influençant le charriage. [less ▲]

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See detailTransfert d’une méthode de dosage automatisée de 3 catécholamines majeures dans l’urine humaine
Rozet, Eric ULg; Dewe, W.; Morello, R. et al

Poster (2006)

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See detailEffects of Collective Fluctuations in 2D-ELDOR spectroscopy
Fresch, Barbara ULg; Moro, Giorgio J.

Poster (2006)

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See detailChemical composition and lipid fraction characteristics of aleppo pine (Pinus halepensis Mill.) seeds cultivated in Tunisia
Cheikh-Rouhou, S.; Hentati, B.; Besbes, S. et al

in Food Science & Technology International (2006), 12(5), 407-415

The proximate composition of Aleppo pine (Pinus halepensis Mill.) seeds cultivated in Bizerta (Tunisia) were investigated for their fatty acid composition, and their thermal and physical properties of ... [more ▼]

The proximate composition of Aleppo pine (Pinus halepensis Mill.) seeds cultivated in Bizerta (Tunisia) were investigated for their fatty acid composition, and their thermal and physical properties of lipid fraction. The proximate analysis of pine seeds showed the following composition (on a dry-weight basis): protein 22.7%, oil 43.3%, ash 8.3% and total carbohydrate 25.7%. Potassium, magnesium and calcium were the predominant mineral elements present in the seeds and reached, together, about 1%. Oleic and linoleic acids were the major unsaturated fatty acids (27.3 and 48.8%, respectively), while the main saturated one was palmitic acid (8.75%). Myristic, myristoleic, palmitoleic, margaric, margaroleic, stearic, linolenic, arachidic, eicosenoic, eicosadienoic eicosatrienoic behenic and lignoceric acids were also detected. Thermal profile of Pinus halepensis Mill. seed oil, determined by its DSC melting curve, showed that the entire liquefaction of the Aleppo pine seed oil occurs at -8 degrees C. GeLab colour parameters (L*, a*, b*), oxidative stability by Rancimat test and viscosity were also determined. Physicochemical properties of the oil include: saponification number 190, peroxide value 3.18, iodine index 117, and a low acidity of 0.61%. Results suggested that the production of oil from Pinus halepensis seeds could provide a potential use in food, pharmaceutical, cosmetics and other non-food industries. [less ▲]

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See detailWork Spaces in Art, Science and Business
Froehlicher, Thomas ULg; Joly, Jean-Baptiste; Billier, Dominique

Book published by Merz&Solitude Reihe Reflexiv (2006)

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