References of "2006"
     in
Bookmark and Share    
Full Text
Peer Reviewed
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 ▲]

Detailed reference viewed: 24 (2 ULg)
Peer Reviewed
See detailL'endoctrinement affectif du citoyen, La politique sous l'éclairage des sciences psychologiques: Préface
Hermans, Michel ULg

in Pleyers, Gordy (Ed.) L'endoctrinement affectif du citoyen, La politique sous l'éclairage des sciences psychologiques (2006)

Detailed reference viewed: 18 (3 ULg)
See detailINTERREG III Projekt: Erdbebenmikrozonierung am südlichen Oberrhein: Teilbericht 2
Havenith, Hans-Balder ULg; Fäh, Donat

Report (2006)

Um Abschätzungen der S-Wellengeschwindigkeit für die verschiedenen geologischen Formationen in der Region zu erhalten, wurde eine grosse Anzahl von Arraymessungen durchgeführt. Das Ziel einer solchen ... [more ▼]

Um Abschätzungen der S-Wellengeschwindigkeit für die verschiedenen geologischen Formationen in der Region zu erhalten, wurde eine grosse Anzahl von Arraymessungen durchgeführt. Das Ziel einer solchen Messung ist die Bestimmung der Phasengeschwindigkeit der Rayleighwellen (Fundamentalmode und höhere Moden) als Funktion der Frequenz. Aus der Phasengeschwindigkeit lassen sich Modelle für die S-Wellengeschwindigkeit der lokalen Struktur invertieren. Bei der Inversion werden sowohl geologische Informationen, als auch die gemessene Eigenfrequenz der Lockersedimente und die Eigenschaften der gemessenen H/V Kurve verwendet. Ergänzt wurden die Messungen des Schweizerischen Erdbebendienstes durch Messungen des Bureau de Recherche Geologique et Miniere (BRGM) und des Leibniz Instituts für Geowissenschaftliche Gemeinschaftsaufgaben, Hannover (GGA). Abbildung 1 zeigt die Standorte der durchgeführten Messungen im Untersuchungsgebiet. Die Charakterisierung der verschiedenen geologischen Strukturen ist die Grundlage für die Entwicklung von Modellen für die numerische Modellierung. [less ▲]

Detailed reference viewed: 8 (0 ULg)
Full Text
See detailA fourth level of Frasnian carbonate mounds along the south side of the Dinant Synclinorium (Belgium)
Boulvain, Frédéric ULg; Coen-Aubert, M.

in Bulletin de l'Institut Royal des Sciences Naturelles de Belgique. Sciences de la Terre (2006), 76

An additional level of Frasnian mounds has been recognized in the La Boverie quarry at Rochefort and in four boreholes drilled in the Nord quarry at Frasnes, on the south side of the Dinant Synclinorium ... [more ▼]

An additional level of Frasnian mounds has been recognized in the La Boverie quarry at Rochefort and in four boreholes drilled in the Nord quarry at Frasnes, on the south side of the Dinant Synclinorium. It occurs between the Arche and Lion Members belonging respectively to the Moulin Liénaux and Grands Breux Formations, in the middle part of the stage. The new name of La Boverie Member is introduced at the top of the Moulin Liénaux Formation, for the deposits lying between the Arche and Bieumont Members; the latter is the basement of the Lion mound. The same succession has been observed in the sections of Moulin Bayot close to Vodelée, in the southeastern part of the Philippeville Anticlinorium. The La Boverie Member starts with rather deep bioclastic sediments, after the collapse of the carbonate factory at the top of the Arche mound. In the upper part of the lithostratigraphic unit, there is a thin buildup characterized by relatively shallow facies. The solitary rugose corals Macgeea boveriensis n. sp., M. socialis SOSHKINA, 1939 and Sinodisphyllum posterum (IVANIA, 1965) collected in the lower part of the La Boverie Member are described in detail whereas the revision of S. kielcense (ROZKOWSKA, 1979) occurring in the Bieumont Member is also provided. [less ▲]

Detailed reference viewed: 46 (7 ULg)
Full Text
Peer Reviewed
See detailPreliminary development of real time PCR for quantification of Erwinia species infecting potato tubers.
Massart, Sébastien ULg; Moh, A.; Roussel, S. et al

in Communications in agricultural and applied biological sciences (2006), 71(3 Pt B), 1171-1173

Detailed reference viewed: 13 (0 ULg)
Peer Reviewed
See detailUsing physiological signals for sound creation
Filatriau, J. J.; Lehembre, Remy ULg; Noirhomme, Quentin ULg et al

in Proceedings of the 11-th International Conference Speech and Computer, SPECOM'2006 (2006)

Detailed reference viewed: 6 (0 ULg)
Full Text
Peer Reviewed
See detailA model reduction method for the control of rigid mechanisms
Bruls, Olivier ULg; Duysinx, Pierre ULg; Golinval, Jean-Claude ULg

in Multibody System Dynamics (2006), 15(3), 213-227

This paper presents a reduction method to build closed-form dynamic equations for rigid multibody systems with a minimal kinematic description. Relying on an initial parameterization with absolute ... [more ▼]

This paper presents a reduction method to build closed-form dynamic equations for rigid multibody systems with a minimal kinematic description. Relying on an initial parameterization with absolute displacements and rotations, the method is able to tackle complex topologies with closed-loops in a systematic way and its extension to flexible multibody systems will be investigated in the future. Thus, it would be of great use in the framework of model-based control of mechanisms. The method is based on an interpolation strategy. The initial model is built and reduced for a number of selected points in the configuration space. Then, a piecewise polynomial model is adjusted to match the collected data. After the presentation of the reduction procedure and of the interpolation strategy, two applications of the reduction method are considered: a four-bar mechanism and a parallel kinematic machine-tool called "Orthoglide". [less ▲]

Detailed reference viewed: 40 (12 ULg)
See detailImagerie médicale - bases physiques
Seret, Alain ULg; Hoebeke, Maryse ULg

Book published by Editions de l'Université de Liège (2006)

The book explains the physical foundations of the most common in-vivo medical imaging modalities. It is written for readers having a basic knowledge of physics. However the most essential physical ... [more ▼]

The book explains the physical foundations of the most common in-vivo medical imaging modalities. It is written for readers having a basic knowledge of physics. However the most essential physical phenomenon and their properties are described. Exploring the electromagnetic spectrum from the shortest to the longest wavelengths the book deals with nuclear imaging, RX imaging, endoscopy, thermography and MRI. Acoustic wave and ultrasonography is the next subject. The book ends with the digital image and a few radioprotection notions. [less ▲]

Detailed reference viewed: 434 (44 ULg)
Full Text
Peer Reviewed
See detailElectrostimulation du muscle dénervé (Questions-réponses)
Vanderthommen, Marc ULg

in Correspondances en Nerf & Muscle (2006), 1(3-4), 31-32

Detailed reference viewed: 50 (9 ULg)
Full Text
Peer Reviewed
See detailMultisegmented tangential breast fields: an effective step towards IMRT without a significantly higher secondary cancer risk
GULYBAN, Akos ULg; Kovács, Péter; Bellyei, Szabolcs et al

in Radiotherapy & Oncology (2006), 81(suppl 1), 172

Detailed reference viewed: 2 (0 ULg)
Full Text
See detailRainer BARTHOLOMAI, Proklos. Kommentar zu Platons Parmenides 141E-142A
Gavray, Marc-Antoine ULg

in Revue Philosophique de Louvain (2006), (2), 214-216

Detailed reference viewed: 68 (0 ULg)
Full Text
Peer Reviewed
See detailA structural, infrared, and Mossbauer spectral study of rosemaryite, NaMnFe3+Al(PO4)(3)
Hatert, Frédéric ULg; Hermann, R. P.; Fransolet, André-Mathieu ULg et al

in European Journal of Mineralogy (2006), 18(6, NOV-DEC), 775-785

Rosemaryite, ideally NaMnFe(3+)AI(PO4)(3), has been collected in the Buranga pegmatite, Rwanda. A single-crystal structure refinement was performed to R-1 = 4.01 %, in the P2(1)/n space group, with a = 12 ... [more ▼]

Rosemaryite, ideally NaMnFe(3+)AI(PO4)(3), has been collected in the Buranga pegmatite, Rwanda. A single-crystal structure refinement was performed to R-1 = 4.01 %, in the P2(1)/n space group, with a = 12.001(2), b = 12.396(1), c = 6.329(1) angstrom, beta 114.48(1)degrees, Vol. = 856.9(2) angstrom(3), Z = 4. The crystal structure and cation distributions are similar to those of ferrorosemaryite, NaFe2+Fe3+Al(PO4)(3), and qingheiite, Na2MnMgAl(PO4)(3), but aluminium predominantly occurs in the M(2a) site, not in the M(2b) site as observed in ferrowyllieite, Na2Fe22+Al(PO4)(3). The topologies of the X(1a) and X(1b) crystallographic sites are identical to those found in ferrorosemaryite, and correspond to a distorted octahedron and to a distorted cube, respectively. The [7+1]-coordinated X(2) site is a very distorted gable disphenoid, similar to the A(2)' site of the alluaudite structure. Mossbauer spectra have been obtained from 4.2 to 295 K, and fitted with a model including two Fe3+ and two Fe2+ doublets. The Fe2+ component corresponding to 2/3 of the Fe2+ spectral area and having a smaller quadrupole splitting of 2.63 mm/s at 15 K, is assigned to the Fe2+ on the M(2a) site, and the Fe2+ component with the larger quadrupole splitting of 3.17 mm/s at 15 K, is assigned to the Fe2+ on the M(1) site. Fe3+ is located only at the M(2a) and M(2b) sites, and the Fe3+ component corresponding to 3/4 of the Fe3+ and exhibiting the larger quadrupole spitting of 0.77 mm/s at 15 K, is most likely associated with Fe3+ on the M(2b) site. The infrared spectrum of rosemaryite shows absorption bands at 3450 and 1624 cm(-1), bands that arise from the vibrational modes of H2O and confirm the presence of water in the channels of the wyllieite structure. A comparison of both the Mossbauer spectra and structural data of rosemaryite with those of other phosphates of the alluaudite and wyllieite groups, is also presented. [less ▲]

Detailed reference viewed: 22 (0 ULg)
Full Text
Peer Reviewed
See detailValidation of a portable equine metabolic measurement system
Art, Tatiana ULg; Duvivier, D. H.; van Erck, Emmanuelle et al

in Equine Veterinary Journal. Supplement (2006), 36

REASONS FOR PERFORMING STUDY: In equine sports medicine, VO2 has been measured exclusively with stationary systems, in laboratories equipped with a treadmill. Measurement during exercise in field ... [more ▼]

REASONS FOR PERFORMING STUDY: In equine sports medicine, VO2 has been measured exclusively with stationary systems, in laboratories equipped with a treadmill. Measurement during exercise in field conditions has not previously been reported because of the lack of portable equipment designed for horses. OBJECTIVES: A commercially available portable metabolic measurement system, based on breath-to-breath gas analysis and flow spirometry, was adapted to the horse's physiology and morphology (Cosmed K4b2 and Equimask) and its validity tested by (1) repeatability of the measures and (2) comparing metabolic data to those obtained by a reference method (RM). METHODS: To test the reproducibility of the measurements, 5 healthy saddle horses were subjected twice at 2 day intervals to a similar submaximal standardised incremental exercise test on a treadmill. The same horses performed twice at one week interval an incremental treadmill test to fatigue: the oxygen consumption and ventilation were measured once with the K4b2 system and once with the RM. The metabolic and ventilatory data obtained with both systems were compared. RESULTS: There was a good reproducibility of the metabolic measurements obtained by the K4b2 system at any workload. The VO2 obtained by both systems at any workload was not significantly different. However, the K4b2 expired fraction in CO2 (FETCO2) and carbon dioxide production (VCO2) were significantly lower at high and at maximal workloads. As a consequence, the values of the respiratory exchange ratio were too low and incompatible with normal physiological values. CONCLUSIONS: The good reproducibility of the metabolic and ventilatory measurements and the fact that the VO2 measurements at any workload were similar to the data obtained with the reference method suggested that this system may be used for comparison of repeated VO2 measurements in practical field conditions. POTENTIAL RELEVANCE: The K4b2 system could be used to improve knowledge of the energetic cost in different equine sports disciplines and offer the opportunity to undertake performance tests with genuine track conditions, on ridden or harnessed horses, rather than under laboratory conditions [less ▲]

Detailed reference viewed: 102 (13 ULg)
Full Text
Peer Reviewed
See detailApplication of a novel oscillatory flow micro-bioreactor to the production of γ-decalactone in a two immiscible liquid phase medium
Reis, N.; Gonçalves, C. N.; Aguedo, Mario ULg et al

in Biotechnology Letters (2006), 28(7), 485-490

A novel micro-bioreactor based on the oscillatory flow technology was applied to the scale-down of the biotechnological production of γ-decalactone. A decrease up to 50% of the time required to obtain the ... [more ▼]

A novel micro-bioreactor based on the oscillatory flow technology was applied to the scale-down of the biotechnological production of γ-decalactone. A decrease up to 50% of the time required to obtain the maximum concentration of the compound was observed, when compared with other scaled-down platforms (stirred tank bioreactor or shake flask). A three-fold increase in γ-decalactone productivity was obtained by increasing oscillatory mixing intensity from Re o ∼482 to Re o ∼1447. This was presumably related to the effective contribution of the reactor geometry to enhanced mass transfer rates between the two immiscible liquid phases involved in the process by increasing the interfacial area. © Springer 2006. [less ▲]

Detailed reference viewed: 4 (0 ULg)
Full Text
Peer Reviewed
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 ▲]

Detailed reference viewed: 13 (0 ULg)
Full Text
Peer Reviewed
See detailStructure-based pharmacophore of COX-2 selective inhibitors and identification of original lead compounds from 3D database searching method
Michaux, C.; De Leval, X.; Julémont, F. et al

in European Journal of Medicinal Chemistry (2006), 41

Detailed reference viewed: 34 (0 ULg)
See detailEtude du mécanisme de production de sons chez Amphiprion clarkii (Pomacentridae)
Colleye, Orphal ULg

Master of advanced studies dissertation (2006)

Les Pomacentridae constituent une des familles de l’ordre des Perciformes pour lesquels le comportement acoustique a déjà été avéré chez de nombreuses espèces. A l’heure actuelle, sept genres sont ... [more ▼]

Les Pomacentridae constituent une des familles de l’ordre des Perciformes pour lesquels le comportement acoustique a déjà été avéré chez de nombreuses espèces. A l’heure actuelle, sept genres sont référencés comme étant des producteurs de sons : Amphiprion, Dascyllus, Stegastes, Chromis, Abudefduf, Plectroglyphidodon et Hemichromis. Les émissions sonores interviennent principalement dans la reproduction et la défense de territoire ; contribuant ainsi à la survie et au succès reproducteur des individus. Les Amphiprioninae, mieux connus sous le nom de poissons-clowns, créent de véritables clans familiaux au sein d’une même actinie autour de laquelle ils déterminent leur territoire. Ainsi, la production de sons semble jouer un rôle important dans leur comportement ; la structure sociale qui règne chez ces poissons impliquant le respect de la territorialité et de la hiérarchie, les émissions sonores pourraient notamment avoir comme rôle de maintenir une bonne cohésion au sein du groupe. Malgré plusieurs études réalisées sur la production de sons chez les Amphiprion, aucune explication satisfaisante du mécanisme producteur de sons n’a été développée, seules quelques hypothèses ont été formulées. Ce travail repose sur une approche biomécanique de la production de sons basée sur la réalisation de films aux rayons X à l’aide d’une caméra à haute vitesse, combinée à une étude de morphologie fonctionnelle. Le mécanisme sonore serait autre que ceux habituellement proposés (l’action de la vessie natatoire et le grincement des dents des mâchoires pharyngiennes). Il impliquerait la mise en mouvement de nombreuses structures squelettiques, notamment la dépression du plancher pharyngien ; ce dernier engendrerait alors la tension du ligament angulo-cératohyal dont la mise en vibration pourrait être à l’origine des émissions sonores [less ▲]

Detailed reference viewed: 25 (1 ULg)
Peer Reviewed
See detailIntraoperative brain image update based on biomechninical models
Vigneron, Lara M.; Robe, Pierre A.; Verly, Jacques ULg

Conference (2006)

Detailed reference viewed: 1 (0 ULg)