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See detailA finite volume based data transfer method for remeshing. Application to metal forming problems
Bussetta, Philippe ULg; Ponthot, Jean-Philippe ULg

in Proceedings of the 18th International Symposium on Plasticity & Its Current Applications (2012, January)

The resolution of many nonlinear solid mechanical problems with the Finite Elements Method requires remeshing when very large deformations occur. The remeshing operation is divided into two parts: the ... [more ▼]

The resolution of many nonlinear solid mechanical problems with the Finite Elements Method requires remeshing when very large deformations occur. The remeshing operation is divided into two parts: the generation of the new mesh and the data transfer from the old to the new mesh. In dynamic plasticity problems, two kinds of fields have to be transferred: the first is defined thanks to the nodal values and the second one is defined at the integration points. These two kinds of fields are transferred thanks to an original computation of the Data Transfer Method based on the Finite Volume Elements. This method is compared to another one using Mortar Elements to solve metal forming problems. [less ▲]

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See detailInternet-Based Investing at the Edge of Chaos
Choffray, Jean-Marie ULg

E-print/Working paper (2012)

This paper presents a simple, seven-step approach, to surviving on World Street: an investment environment characterized by high frequency trading system; over leveraged shadow entities and hedge funds ... [more ▼]

This paper presents a simple, seven-step approach, to surviving on World Street: an investment environment characterized by high frequency trading system; over leveraged shadow entities and hedge funds; flash crashes, incompetent management, reverse merger frauds, dot bubble 2.0 IPOs and stealth central banks’ actions. Its goal is to help you design efficient investment strategies while protecting your assets. It is based on a personal research conducted over the last ten years, involving hundreds of observations, investment simulations and actual decisions. [less ▲]

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See detailLife-cycle assessment of residential buildings in three different European locations, basic tool
Rossi, Barbara ULg; Marique, Anne-Françoise ULg; Glaumann, Mauritz et al

in Building & Environment (2012), 51

The paper deals with the development of a tool used for the life cycle assessment of residential buildings located in three different European towns: Brussels (Belgium), Coimbra (Portugal) and Luleå ... [more ▼]

The paper deals with the development of a tool used for the life cycle assessment of residential buildings located in three different European towns: Brussels (Belgium), Coimbra (Portugal) and Luleå (Sweden). The basic tool focuses on the structure and the materials of the buildings and permits the evaluation of the Embodied energy, Embodied carbon and yearly energy consumption. For that purpose, a different set of original data is taken into account for each location, in which the monthly temperatures, energy mix, heating and cooling systems are defined. The energy consumption, being for heating space or water, for cooling or for lighting is transformed into CO2 emissions to deduce the Operational carbon as well. The influence of the energy mix can therefore be assessed in the basic tool. As a matter of fact, the heating and cooling systems habitually used in the three countries are also of great importance. The District Heating system, is, for instance, incorporated in the basic tool. The presence of solar water heater or photovoltaic panels is also strongly influencing the operational carbon. After a short literature review on building LCA and the description of the basic tool, the software Pleiades+Comfie combined with Equer is used to achieve the complete LCA for one building using two different load bearing frames. The results of the calculations for Brussels climate are verified against these software results. The dependence of the results to parameters such as climate, energy mix and habits is then discussed in the companion paper. [less ▲]

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See detailCompte-rendu de l'ouvrage de Bernard Lahire : "Franz Kafka : Eléments pour une théorie de la création littéraire" (2010)
Ledent, David ULg

in Homme (L') : Revue Française d'Anthropologie (2012), 201

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See detailHBV infection in Belgium: results of the BASL observatory of 1456 HBsAg carriers.
Deltenre, P.; Laleman, W.; Van Gossum, M. et al

in Acta Gastro-Enterologica Belgica (2012), 75(1), 35-41

Introduction : Nationwide studies are mandatory to assess changes in the epidemiology of HBV infection in Europe. Aim : To describe epidemiological characteristics of HBsAgpositive patients, especially ... [more ▼]

Introduction : Nationwide studies are mandatory to assess changes in the epidemiology of HBV infection in Europe. Aim : To describe epidemiological characteristics of HBsAgpositive patients, especially inactive carriers, and to evaluate how practitioners manage HBV patients in real life. Methods : Belgian physicians were asked to report all chronically infected HBV patients during a one-year period. Results : Among 1,456 patients included, 1,035 (71%) were classified into one of four phases of chronic infection : immune tolerance (n = 10), HBeAg-positive hepatitis (n = 248), HBeAgnegative hepatitis (n = 420) and inactive carrier state (n = 357 HBeAg-negative patients with ALT < upper limit of normal (ULN) and HBV DNA < 2,000 IU/mL). Using less restrictive criteria for ALT (1-2 ULN) or HBV DNA (2,000-20,000 IU/mL), 93 unclassified patients were added to the group of inactive carriers. These 93 additional inactive carriers were younger, more frequently males, with similar risk factors for HBV infection and histological features compared to inactive carriers according to recent guidelines. Recent guidelines on management of HBV patients were generally followed, but systematic HBV DNA measurements and HDV coinfection screening should be reinforced. Conclusion : In Belgium, an inactive carrier state was a common form of chronic HBV infection. Using less restrictive criteria for classification of inactive carriers did not modify their main characteristics and seemed better adapted to clinical practice. Recent guidelines on management of HBV patients should be reinforced. [less ▲]

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See detailOverview of the S-adic conjecture
Leroy, Julien ULg

Conference (2012, January)

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See detailSystemisch-entzuendliche Reaktion beim Hochleistungssportpferd
Sandersen, Charlotte ULg; Lejeune, Jean-Philippe ULg; Votion, Dominique ULg et al

Book published by Leipziger Blaue Hefte (2012)

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See detailContribution à la résolution de la conjecture S-adique
Leroy, Julien ULg

Doctoral thesis (2012)

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See detailMadeleine Bourdouxhe, la pudeur et l'ellipse
Demoulin, Laurent ULg

in Kovacshazy, Cécile (Ed.) Relire Madeleine Bourdouxhe. Regards croisés sur son oeuvre littéraire (2012)

La modernité de Madeleine Bourdouxhe passe par des figures de la narration, comme la métalipse et ce que l'on se propose d'appeler ici "figure Stendhal" et "figure Flaubert".

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See detailNumerical computations of hypersonic boundary layer roughness induced transition on a at plate
Serino, Gennaro ULg; Pinna, Fabio; Rambaud, Patrick et al

Scientific conference (2012, January)

The work is focused on numerical simulations of roughness induced transition for hypersonic ow on a at plate wall mounted roughness element. Numerical simulations are compared to experimental results in ... [more ▼]

The work is focused on numerical simulations of roughness induced transition for hypersonic ow on a at plate wall mounted roughness element. Numerical simulations are compared to experimental results in order to resemble the physics highlighted in the tests. In particular, stress has been placed on the detection of the vortices in the wake behind the roughness element and on the onset of transition. [less ▲]

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See detailIntense physical exercise related to the emergent generation of cardiovascular risk markers: a review
LE GOFF, Caroline ULg; LAURENT, Terry ULg; Kaux, Jean-François ULg et al

in Biology of Sport (2012), 29(1), 11-16

Objective: The present review was performed in order to bring together the current knowledge about the impact of intense physical exercise on cardiovascular function, especially on plasma levels of ... [more ▼]

Objective: The present review was performed in order to bring together the current knowledge about the impact of intense physical exercise on cardiovascular function, especially on plasma levels of cardiovascular risk markers such as cardiac troponin T (cTnT), myeloperoxidase (MPO), amino-terminal pro-brain natriuretic peptide (NT-proBNP), C-reactive protein (CRP) and oxidized low-density lipoprotein (oxLDL). Methods: Data were collected using the PubMed database. The articles were chosen for their relevance and importance in the area of interest. Results: The literature describes numerous examples where physical exercise induces plasma variation for the markers studied. Intense physical effort increases the levels of cTnT, MPO and NTproBNP, whereas CRP and oxLDL levels tend to be decreased with regular sport activities. Conclusions: The present literature investigation confirms the fact that intense physical exercise has an impact on the plasma variations of the five cardiovascular risk markers studied. However, practising regular exercise remains one of the first strategies for the prevention of cardiovascular disorders. [less ▲]

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See detailEngineering and characterisation of chimeric CXCR4 and CXCR7 chemokine receptors
Szpakowska, Martyna ULg; Fievez, Virginie; Counson, Manuel et al

Poster (2012, January)

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See detailTransferts de Chaleur et de Matière - Exercices
Mengoni, Marlène ULg; Hogge, Michel ULg

Learning material (2012)

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See detailThe influence of laboratory-induced Meld score differences on liver allocation: more reality than myth.
Schouten, J. N.; Francque, S.; Van Vlierberghe, H. et al

in Clinical Transplantation (2012), 26(1), 62-70

Background: Liver allocation in Eurotransplant (ET) is based on the MELD score. Interlaboratory MELD score differences in INR and creatinine determination have been reported. The clinical implication of ... [more ▼]

Background: Liver allocation in Eurotransplant (ET) is based on the MELD score. Interlaboratory MELD score differences in INR and creatinine determination have been reported. The clinical implication of this observation has not been demonstrated. Methods: MELD scores were calculated in 66 patients with liver cirrhosis using bilirubin, creatinine, and INR analyzed in six liver transplant centers. Based on allocation results of ET, patients transplanted from December 2006 to June 2007 were divided according to MELD score in four groups. For each group, the influence of the match MELD on the probability of receiving a transplant was studied (Cox proportional hazards model). Results: Laboratory-dependent significant differences in MELD score were demonstrated. Cox proportional hazards model showed a significant association between MELD score and the probability of organ allocation. The unadjusted hazard ratio for receiving a liver transplant was significantly different between group 2 and group 4 (group 2: MELD 19–24; group 4: MELD > 30). Conclusion: Laboratory-dependent significant differences in MELD score were observed between the six transplant centers. We demonstrated a significant association between the MELD score and the probability of organ allocation. The observed interlaboratory variation might yield a significant difference in organ allocation in patients with high MELD scores. [less ▲]

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See detailPlurilinguismes à la Renaissance italienne
Moreno, Paola ULg

in Culture, le Magazine Culturel de l'Université de Liège (2012)

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See detailSynthesis of star and H-shape polymers via a combination of cobalt-mediated radical polymerization and nitrone mediated radical coupling reactions
Detrembleur, Christophe ULg; Debuigne, Antoine ULg; Altintas, Ozcan et al

in Polymer Chemistry (2012), 3(1), 135-147

Via consecutive cobalt-mediated radical polymerization (CMRP), nitrone-mediated radical coupling (NMRC) and copper catalyzed azide-alkyne cycloaddition (CuAAC), polymers with mikto-arm star and H-shape ... [more ▼]

Via consecutive cobalt-mediated radical polymerization (CMRP), nitrone-mediated radical coupling (NMRC) and copper catalyzed azide-alkyne cycloaddition (CuAAC), polymers with mikto-arm star and H-shape architecture were synthesized. Poly(vinyl acetate)40-block-poly(acrylonitrile)78-Co(acac)2 polymers were synthesized via CMRC and subsequently coupled using an alkyne functional nitrone. The coupling efficiency of the NMRC process was assessed employing N-tert-butyl a-phenyl nitrone (PBN), which is structurally very similar to the later employed coupling agent. Generally, coupling efficiencies of close to 90% or higher were observed in all cases. Since the coupling reaction yields triblock copolymers bearing an alkoxyamine functionality (and thus also an alkyne group) in the middle of the chain, well defined PEG conjugates could be obtained via CuAAC. Miktoarm star polymers of the structure (PVAc-b-PAN)2-PEG were generated as well as H-shaped material of the structure (PVAc-b-PAN)2-PEG-(PVAc-b-PAN)2 via conjugation with bifunctional PEG. In all cases, very narrow molecular weight material was obtained. Molecular weight analysis of the intermediate and the final products reveals that the hydrodynamic volume of the miktoarm star and the H-shaped materials is not substantially increased during the final conjugation reaction despite the fact that the absolute molecular weight increases by more than a factor of two in the latter case. Success of the conjugation reactions was confirmed via composition analysis via NMR. [less ▲]

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See detailConsumer valuation of improved rice parboiling technologies in Benin
Matty, Demont; Zossou, Enangnon ULg; Pieter, Rutsaert et al

in Food Quality & Preference (2012), 23(1), 63-70

In Benin, traditional parboiling is still widely practiced among rice processors, resulting in inferior grain quality. A new parboiler was introduced to improve the milling yield and intrinsic quality of ... [more ▼]

In Benin, traditional parboiling is still widely practiced among rice processors, resulting in inferior grain quality. A new parboiler was introduced to improve the milling yield and intrinsic quality of local rice. We conducted Vickrey second price auctions to elicit rural Beninese consumers’ willingness to pay for rice obtained through the new parboiler and two locally innovated parboilers. The individual auctions were followed by a group discussion during which consensus was reached on socially acceptable prices. Relative to traditionally parboiled rice, consumers were willing to pay price premiums of 9–13% for rice obtained through a local parboiler using a container of which the bottom is a perforated metal, 27% for rice obtained through a local parboiler using wooden sticks at the bottom of the pot, and 25–34% for rice parboiled through the improved parboiler. Bids were influenced by the presentation order of the products according to perceived quality. Bids were also higher when participants had been informed on the benefits of improved parboiling techniques, which is a crucial insight for developing marketing and communication strategies for this improved quality product. Group bids were not significantly different from individual bids which suggests that the latter are within the range of socially acceptable prices defined through group consensus. [less ▲]

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See detailLes étudiants sont-ils compétents pour évaluer la qualité des enseignements
Detroz, Pascal ULg

in Dierendonck, Christophe (Ed.) Actes du colloque du 24ème colloque de l'ADMEE (2012, January)

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