References of "2011"
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See detailIntérêt d'une augmentation de dose des analogues de la somatostatine dans l'acromégalie
Vasilev, Vladimir; Beckers, Albert ULg

in Andrologic (2011), 7(4),

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See detailOptimal design of multi-subject blocked fMRI experiments.
Maus, Bärbel ULg; van Breukelen, Gerard J P; Goebel, Rainer et al

in NeuroImage (2011), 56(3), 1338-1352

The design of a multi-subject fMRI experiment needs specification of the number of subjects and scanning time per subject. For example, for a blocked design with conditions A or B, fixed block length and ... [more ▼]

The design of a multi-subject fMRI experiment needs specification of the number of subjects and scanning time per subject. For example, for a blocked design with conditions A or B, fixed block length and block order ABN, where N denotes a null block, the optimal number of cycles of ABN and the optimal number of subjects have to be determined. This paper presents a method to determine the optimal number of subjects and optimal number of cycles for a blocked design based on the A-optimality criterion and a linear cost function by which the number of cycles and the number of subjects are restricted. Estimation of individual stimulus effects and estimation of contrasts between stimulus effects are both considered. The mixed-effects model is applied and analytical results for the A-optimal number of subjects and A-optimal number of cycles are obtained under the assumption of uncorrelated errors. For correlated errors with a first-order autoregressive (AR1) error structure, numerical results are presented. Our results show how the optimal number of cycles and subjects depend on the within- to between-subject variance ratio. Our method is a new approach to determine the optimal scanning time and optimal number of subjects for a multi-subject fMRI experiment. In contrast to previous results based on power analyses, the optimal number of cycles and subjects can be described analytically and costs are considered. [less ▲]

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See detailNegations at Medinet Habu
Gillen, Todd Jonathan ULg

Conference (2011)

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See detailBrain natriuretic peptide in asymptomatic degenerative mitral regurgitation: determinants and impact on outcome.
Van de Heyning, C; Magne, Julien ULg; Mahjoub, H et al

Conference (2011)

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See detailPresent day carbon dioxide fluxes in the coastal ocean and possible feedbacks under global change
Borges, Alberto ULg

in da Silva Duarte, P. M.; Santana Casiano, J. M. (Eds.) Oceans and the atmospheric carbon content (2011)

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See detailA discrete competitive facility location model with variable attractiveness
Kucukaydin, Hande ULg; Aras, Necati; Altinel, I. Kuban

in Journal of the Operational Research Society (2011), 62(9), 1726-1741

We consider the discrete version of the competitive facility location problem in which new facilities have to be located by a new market entrant firm to compete against already existing facilities that ... [more ▼]

We consider the discrete version of the competitive facility location problem in which new facilities have to be located by a new market entrant firm to compete against already existing facilities that may belong to one or more competitors. The demand is assumed to be aggregated at certain points in the plane and the new facilities can be located at predetermined candidate sites. We employ Huff’s gravity-based rule in modelling the behaviour of the customers where the probability that customers at a demand point patronize a certain facility is proportional to the facility attractiveness and inversely proportional to the distance between the facility site and demand point. The objective of the firm is to determine the locations of the new facilities and their attractiveness levels so as to maximize the profit, which is calculated as the revenue from the customers less the fixed cost of opening the facilities and variable cost of setting their attractiveness levels. We formulate a mixed-integer nonlinear programming model for this problem and propose three methods for its solution: a Lagrangean heuristic, a branch-and-bound method with Lagrangean relaxation, and another branch-and-bound method with nonlinear programming relaxation. Computational results obtained on a set of randomly generated instances show that the last method outperforms the others in terms of accuracy and efficiency and can provide an optimal solution in a reasonable amount of time. [less ▲]

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See detailThe extension of the INCL model for simulation of shielding in space
Pedoux, Sophie ULg; Cugnon, Joseph ULg; Mancusi, Davide ULg et al

in Advances in Space Research (2011), 48(2), 383-389

Radiation hazard for space missions is mainly due to cosmic ray protons, helium nuclei and light ions, whose energy spectrum is maximum around 1 GeV per nucleon but remains non-negligible for energies up ... [more ▼]

Radiation hazard for space missions is mainly due to cosmic ray protons, helium nuclei and light ions, whose energy spectrum is maximum around 1 GeV per nucleon but remains non-negligible for energies up to 15 GeV per nucleon. Nuclear reactions induced by high energy protons are often described by intranuclear cascade plus evaporation models. The attention is focused here on the Liège Intranuclear Cascade model (INCL), which has been shown to reproduce fairly well a great deal of experimental data for nucleon-induced reactions in the 200 MeV to 2 GeV range, when coupled with the ABLA evaporation-fission code. In order to extend the model to other conditions relevant for space radiation, three improvements of INCL are under development. They are reported on here. First, the reaction model has been extended to nucleon-nucleus reactions at incident energies up to 15 GeV, mainly by the inclusion of additional pion production channels in nucleon-nucleon collisions during the cascade. Second, a coalescence mechanism for the emission of light charged particles has been implemented recently. Finally, the model has been modified in order to accommodate light ions as projectiles. First results are shown and compared with illustrative experimental data. Implications for issues concerning radiation protection in space are discussed. [less ▲]

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See detailLes terres cuites architecturales des églises du haut Moyen Age du NW de la France et du SE de l’Angleterre. Application de la datation par luminescence à l’archéologie du bâti
Blain, Sophie ULg

Book published by Archaeopress (2011)

Until the 1960s, early medieval religious architecture suffered from a general lack of interest by the field of archaeology resulting in a real need for the improvement in knowledge of this often ... [more ▼]

Until the 1960s, early medieval religious architecture suffered from a general lack of interest by the field of archaeology resulting in a real need for the improvement in knowledge of this often-misinterpreted art. Initially considered as outmoded or backward, early medieval architecture is actually dynamic, particularly the transition period between the 9th and the 11th centuries marked by its themes of transference and novelty. One of the features of this architecture is the use of ceramic building materials in the masonry, a technique from the Antiquity that can be observed continuing into the 11th and 12th centuries. This architectural characteristic is visible in areas touched by Roman traditions and particularly in north-western France and south-eastern England, which also benefit from a substantial concentration of early medieval buildings. One of the aims of this work is, therefore, to identify similar architectural tendencies and examine the technological choices made in the construction of the buildings under analysis. In order to achieve this, it is necessary to accurately position key-buildings in the architectural chronology. Amongst methods for this, luminescence dating applied to ceramic building materials is particularly attractive. Not only does it contribute to building archaeology through more precise dating, but its use in this specific aim also presents an opportunity to thoroughly test the method and essentially improve its potential. The first part of the study examines aspects of the political and religious contexts of the period between the 9th and the 11th century, as well as the associated architecture and its components. The second part is devoted to the presentation and the definition of the luminescence dating method. Bringing together these elements enables the twelve case studies from French and English sites selected for this chronology research work to be addressed in detail. Finally, a detailed study of the mode of use of ceramic building materials is presented and an interpretation of this architectural choice will be attempted. [less ▲]

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See detailTaux sérique de vitamine D et réponse au traitement par alendronate
Roux, C.; Chartier, C.; Boonen, S. et al

in Revue du Rhumatisme (2011), 78(S5), 102

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See detailSpecular light reflectance of flakes in seborrhoeic dermatitis of the scalp: a pilot study.
PIERARD-FRANCHIMONT, Claudine ULg; QUATRESOOZ, Pascale ULg; PIERARD, Gérald ULg

in Clinical & Experimental Dermatology (2011), 36(7), 793-6

Seborrhoeic dermatitis and dandruff are common scalp conditions. In this study, we set out to explore a new method for rating both the severity of the scalp condition and the efficacy of scalp-care ... [more ▼]

Seborrhoeic dermatitis and dandruff are common scalp conditions. In this study, we set out to explore a new method for rating both the severity of the scalp condition and the efficacy of scalp-care compounds. Scalp flakiness was sampled for 40 volunteers using adhesive-coated clear discs, with image analysis used to quantify the specular light reflectance (SLR) of the flakes Two ultraviolet (UV)-emitting charge-coupled device cameras (Visioscan VC98 and Visiopor PP34) were used. SLR clearly highlighted the flakiness with high contrast against a black background, and the recorded appearance could be conveniently submitted to the image-analysis system for quantification. In conclusion, SLR under UV illumination highlights scalp flakiness, allowing objective measurements. [less ▲]

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See detailIs there really an Azores diversity enigma? Insights from the phylogeography of the heather Erica scoparia s.l.
Desamore, Aurélie ULg

Poster (2011)

The Azorean flora, in contrast to that of other archipelagos, is characterized by a paucity of evolutionary radiations and the widespread distribution of most endemics. Several hypotheses, including ... [more ▼]

The Azorean flora, in contrast to that of other archipelagos, is characterized by a paucity of evolutionary radiations and the widespread distribution of most endemics. Several hypotheses, including isolation from the continent, recent age, ecological homogeneity, and limited paleoclimatic variations, have been proposed to account for this pattern. These hypotheses are tested here within the context of the molecular phylogeography of the heather Erica scoparia s.l., a Mediterraneo-Atlantic species complex distributed across Macaronesia, North Africa and southwestern Europe. The marked molecular radiation of this species in the Azores, including an array of single-island endemics, suggests that the apparent homogeneity of the Azorean flora might, in fact, conceal undetected patterns of endemism that are similar to those observed in the Canarian flora for morphological data. Haplotype richness was higher in the Azores than in the Canaries and extensive dispersal mediated allopatry is apparent at the molecular level. The Azores were colonized at least twice independently by E. scoparia, whereas the Canarian haplotypes are monophyletic, suggesting that the greater distance between the Azores and the continent does not necessarily hamper the chances of successful colonization. [less ▲]

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See detailConvergence of Logic of Cellular Regulation in Different Premalignant Cells by an Information Theoretic Approach
Kravchenko-Balasha, N.; Remacle, Françoise ULg; Gross, A. et al

in BMC Systems Biology (2011), 5

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See detailConstraining statistical-model parameters using fusion and spallation reactions
Mancusi, D.; Charity, R. J.; Cugnon, Joseph ULg

in European Physics Journal: Web of conferences (2011)

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See detailDe invloed van een muzikale opleiding op de perceptie van de prosodie van een vreemde taal: een verkennend onderzoek
Degrave, Pauline; Rasier, Laurent ULg; Hiligsmann, Philippe

in Rasier, Laurent; Van Heuven, Vincent; Defrancq, Bart (Eds.) et al Nederlands in het perspectief van uitspraakverwerving en contrastieve taalkunde (2011)

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See detailInfluence of veneer thickness on residual stress profile in veneering ceramic: Measurement by hole-drilling.
MAINJOT, Amélie ULg; Schajer, G. S.; Vanheusden, Alain ULg et al

in Dental Materials (2011)

OBJECTIVES: The veneering process of frameworks induces residual stresses and can initiate cracks when combined with functional stresses. The stress distribution within the veneering ceramic as a function ... [more ▼]

OBJECTIVES: The veneering process of frameworks induces residual stresses and can initiate cracks when combined with functional stresses. The stress distribution within the veneering ceramic as a function of depth is a key factor influencing failure by chipping. This is a well-known problem with Yttria-tetragonal-zirconia-polycrystal based fixed partial dentures. The objective of this study is to investigate the influence of veneer thickness on the stress profile in zirconia- and metal-based structures. METHODS: The hole-drilling method, often used for engineering measurements, was adapted for use with veneering ceramic. The stress profile was measured in bilayered disc samples of 20mm diameter, with a 1mm thick zirconia or metal framework. Different veneering ceramic thicknesses were performed: 1mm, 1.5mm, 2mm, 2.5mm and 3mm. RESULTS: All samples exhibited the same type of stress vs. depth profile, starting with compressive at the ceramic surface, decreasing with depth up to 0.5-1.0mm from the surface, and then becoming compressive again near the framework, except for the 1.5mm-veneered zirconia samples which exhibited interior tensile stresses. Stresses in the surface of metal samples were not influenced by veneer thickness. Variation of interior stresses at 1.2mm from the surface in function of veneer thickness was inverted for metal and zirconia samples. SIGNIFICANCE: Veneer thickness influences in an opposite way the residual stress profile in metal- and in zirconia-based structures. A three-step approach and the hypothesis of the crystalline transformation are discussed to explain the less favorable residual stress development in zirconia samples. [less ▲]

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See detailUnderstanding Crystallization of Anatase into Binary SiO2/TiO2 Sol-Gel Optical Thin Films: An in Situ Thermal Ellipsometry Analysis
Louis, B.; Krins, Natacha ULg; Faustini, M. et al

in Journal of Physical Chemistry C: Nanomaterials, Interfaces, and Hard Matter (2011), 115

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See detailHydrogeological study of Somes-Szamos transboundary alluvial aquifer
Drobot, Radu; Szucs, Peter; Brouyère, Serge ULg et al

in Ganoulis, Jacques; Aureli, Alice; Fried, Jean (Eds.) Transboundary Water Resources Management: A Multidisciplinary Approach (2011)

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