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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 detailScreening for colorectal cancer in asymptomatic average risk patients: role of imaging.
Hock, D.; Ouhadi, R.; Materne, R. et al

in Acta Gastro-Enterologica Belgica (2011), 74(1), 70-6

Early detection of colorectal cancer or advanced adenomas is a public health priority in many industrialized countries. There are various methods of screening average risk individuals for colorectal ... [more ▼]

Early detection of colorectal cancer or advanced adenomas is a public health priority in many industrialized countries. There are various methods of screening average risk individuals for colorectal cancer, and their effectiveness may depend on subjective parameters like local expertise and patient's preferences. This paper reviews these tests with special emphasis regarding imaging techniques that aim to provide less-invasive alternatives to optical colonoscopy (OC) which is the standard of reference. Both Double-Contrast Barium Enema (DCBE) and Virtual Colonoscopy (VC) have >90% sensitivity compared to OC in the detection of clinically relevant colonic lesions. Nevertheless, VC may have an edge over DCBE for technical and reproductivity reasons, as well as greater learning opportunities. Imaging techniques criticisms regarding diminutive and flat lesions, cost, radiation exposure and effects on gastroenterological practice are addressed. [less ▲]

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See detailNonlinear Normal Modes: A Finite Element Approach
Renson, Ludovic ULg; Kerschen, Gaëtan ULg

Conference (2011)

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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 detailDeterminants of high, median and low rates of caesarean deliveries in Belgium
Absil, Gaëtan ULg; Van Parys, A. S.; Bednarek, Stéphanie et al

Report (2011)

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See detailTolerability of shortened infliximab infusion times in patients with inflammatory bowel disease: a single center cohort study
Breynaert, C; Ferrante, F; Fidder, H et al

in Acta Gastro-Enterologica Belgica (2011)

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See detailLa formation de régulations inter-organisationnelles équilibrées et pérennes : Le cas des pratiques de mutualisation de main-d’œuvre
Xhauflair, Virginie ULg

Book published by Editions de l'Université de Liège (2011)

Les partenariats sont aujourd’hui l’un des modes privilégiés d’organisation des entreprises et, plus largement, de structuration de l’activité économique locale. Qu’ils soient labellisés entreprise ré ... [more ▼]

Les partenariats sont aujourd’hui l’un des modes privilégiés d’organisation des entreprises et, plus largement, de structuration de l’activité économique locale. Qu’ils soient labellisés entreprise ré- seau, cluster, pôle de compétitivité, partenariat public-privé ou système productif local, ils sont le lieu de multiples innovations managériales destinées à réguler les interactions sociales qui y prennent place. Les pratiques de mutualisation de main-d’œuvre constituent l’une de ces innova- tions. Un nombre croissant d’entreprises et d’organisations s’associent pour employer ensemble des travailleurs et répondre ainsi, de manière plus ou moins légale et plus ou moins formalisée, à leurs besoins de flexibilité interne et externe. Ces pratiques émergentes prennent des formes diverses, qui vont du pur bricolage inter-organisationnel du type skill-pooling ou co-sourcing, jusqu’aux dis- positifs institutionnalisés tels que les groupements d’employeurs, le portage salarial ou le flexpool. Prenant appui sur trois cas de pratiques de mutualisation de main-d’œuvre émergeant dans diffé- rents partenariats, notre thèse interroge le processus de formation des régulations inter-organisa- tionnelles. A partir d’une démarche réflexive analysant la méthodologie que nous avons mise en œuvre pour initier, accompagner et évaluer ces trois cas, nous proposons un modèle d’analyse des régulations émergentes permettant de qualifier le caractère plus ou moins équilibré et pérenne de celles-ci. Plus spécifiquement, nous soulignons l’importance d’une fonction de tiers dont la prise en charge, partagée par plusieurs acteurs, permet aux parties prenantes de ces nouvelles régu- lations de dépasser les routines institutionnelles et les clivages identitaires dans lesquels ils sont empêtrés. Nous examinons également comment s’opère l’institutionnalisation progressive de ces « bricolages » grâce aux diverses actions de « mise en consistance » réalisées par leurs promoteurs. Enfin, nous montrons comment ces divers outils analytiques peuvent être convertis en outils heu- ristiques à destination des acteurs du marché du travail désireux de faire évoluer leurs propres pratiques tout en accroissant leur contribution à la préservation de l’intérêt général. [less ▲]

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See detailCryothérapie et maladies rhumatismales
Demoulin, Christophe ULg; Vanderthommen, Marc ULg

in Revue du Rhumatisme (2011), 78

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See detailChapitre 73, De Jean Hus, et de Jérôme de Prague
Tilkin, Françoise ULg

in Bernard, Bruno; Renwick, John; Cronk, Nicholas (Eds.) et al Essai sur les mœurs et l’esprit des nations (IV) (2011)

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See detailReactions cutanees a l'encre de tatouage.
FRANCHIMONT, Claudine ULg; Hermanns, Jean-François ULg; PIERARD, Gérald ULg

in Revue Médicale de Liège (2011), 66(7-8), 430-3

Ritual and artistic tattoos rely on the use of numerous pigments which are not all entirely inert once placed in the dermis. The compositions of some tattoo inks are identified. However, new but less well ... [more ▼]

Ritual and artistic tattoos rely on the use of numerous pigments which are not all entirely inert once placed in the dermis. The compositions of some tattoo inks are identified. However, new but less well identified compounds appear on the market. Allergic reactions can be present under different aspects. They may correspond to allergic contact dermatitis or to photodermatitis. Other reactions include allergic hypersensitivity reactions as well as lichenoid, granulomatous or pseudolymphoma reactions. Pulsed light and laser are typically used for regular tattoo removal. These procedures are not indicated in inflamed tattoos. Indeed, the pigment dispersed during photolysis may perpetuate the reaction. Pseudotattoos due to the stratum corneum staining are frequently responsible for photoeczema. [less ▲]

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See detailOptimization of multibody systems and their structural components
Bruls, Olivier ULg; Lemaire, Etienne ULg; Duysinx, Pierre ULg et al

in Blajer, W.; Arczewski, K.; Fraczek, J. (Eds.) et al Multibody Dynamics: Computational Methods and Applications (2011)

This work addresses the optimization of flexible multibody systems based on the dynamic response of the full system with large amplitude motions and elastic deflections. The simulation model involves a ... [more ▼]

This work addresses the optimization of flexible multibody systems based on the dynamic response of the full system with large amplitude motions and elastic deflections. The simulation model involves a nonlinear finite element formulation, a time integration scheme and a sensitivity analysis and it can be efficiently exploited in an optimization loop. In particular, the paper focuses on the topology optimization of structural components embedded in multibody systems. Generally, topology optimization techniques consider that the structural component is isolated from the rest of the mechanism and use simplified quasi-static load cases to mimic the complex loadings in service. In contrast, we show that an optimization directly based on the dynamic response of the flexible multibody system leads to a more integrated approach. The method is applied to truss structural components. Each truss is represented by a separate structural universe of beams with a topology design variable attached to each one. A SIMP model (or a variant of the power law) is used to penalize intermediate densities. The optimization formulation is stated as the minimization of the mean compliance over a time period or as the minimization of the mean tip deflection during a given trajectory, subject to a volume constraint. In order to illustrate the benefits of the integrated design approach, the case of a two degrees-of-freedom robot arm is developed. [less ▲]

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See detailL'imperatrice. Le Molte Vite di Indira Gandhi
Maiorano, Diego ULg

in Storia della Storiografia (2011), 58

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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 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 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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