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See detailComparison of Field Transfer Methods between two meshes
Bussetta, Philippe ULg; Ponthot, Jean-Philippe ULg

in Proceedings of "IV European Conference on Computational Mechanics" (2010)

In many cases, the numerical computation of mechanical problem with Finite Element Method has to transfer some information between two different meshes. For example, if a remeshing is needed or if several ... [more ▼]

In many cases, the numerical computation of mechanical problem with Finite Element Method has to transfer some information between two different meshes. For example, if a remeshing is needed or if several meshes are used (e.g. one for a thermal problem and another one for a mechanical problem). In spite of the research on the Transfer Methods, none of them has been so far clearly established as the best. Each method has advantages and disadvantages. Many problems can happen during the field transfer, like the minimization of the numerical diffusion, the value of the field on the boundaries, etc. This paper compares on the one hand the performances of the Field Transfer Method by classical interpolation with on the other hand one using Mortar Elements. The comparison of the two methods is based on two indicators: the numerical diffusion and the evaluation of the field on the boundaries. In this paper, only the continuous fields are considered. [less ▲]

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See detailCes nombres qu'on dit imaginaires sont-ils des nombres ?
Rosseel, Hilda; Schneider-Gilot, Marguerite ULg

Book published by Presses Universitaires de Liège (2010)

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See detailDéveloppement d'un modèle tertiaire pour la prédiction de la croissance de Listeria monocytogenes et Salmonella spp. dans la viande hachée de porc
Delhalle, Laurent ULg; Adolphe, Ysabelle ULg; Jasick, Adeline ULg et al

in Viandes et Produits Carnés (2010), Hors-série

Tertiary models are proposed in order to predict the growth of Listeria monocytogenes and Salmonella spp. in pork minced meat packaged under stretch film. The models have been calculated from challenge ... [more ▼]

Tertiary models are proposed in order to predict the growth of Listeria monocytogenes and Salmonella spp. in pork minced meat packaged under stretch film. The models have been calculated from challenge-tests at 8°C (L. monocytogenes) and 12°C (Salmonella), the meat being artificially contaminated at 2 log cfu pathogen/g. In a second step, they have been validated at 5, 8 and 10°C for L. monocytogenes (r² : 0.94, 0.98 and 0.95) and 8, 10 and 12°C for Salmonella (r³ : 0.80, 0.92 and 0.98). [less ▲]

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See detailOvercoming inertia: insights from evolutionary economics into improved energy and climate policies
Maréchal, Kevin ULg

in Climate Policy (2010), 10(1), 103-119

The ‘efficiency paradox’ has generated controversy and suggests that mainstream economics is not neutral in the way it deals with climate change. An alternative economic framework, evolutionary economics ... [more ▼]

The ‘efficiency paradox’ has generated controversy and suggests that mainstream economics is not neutral in the way it deals with climate change. An alternative economic framework, evolutionary economics, is used to investigate this crucial issue and offer insights into the development of a complementary framework for designing climate policy and for managing the transition to a low-carbon society. The evolutionary framework allows us to identify the presence of two sources of inertia (i.e. at the individual level through ‘habits’ and at the level of socio-technical systems) that mutually reinforce each other in a path-dependent manner. To overcome ‘carbon lock-in’, decision-makers should design measures (e.g. commitment strategies, niche management) that specifically target those change-resisting factors, as they tend to reduce the efficiency of traditional instruments. A series of recommendations for policy makers is provided. [less ▲]

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See detailUne réforme pour un meilleur fonctionnement et une plus grande transparence
Lecocq, Pascale ULg

in Lecocq, Pascale; Durant, Isabelle; Mostin, Corinne (Eds.) La copropriété par appartements : la réforme de 2010 (2010)

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See detailTraitement perceptif et phonologique atypique dans le syndrome de Williams?
Majerus, Steve ULg

Scientific conference (2010)

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See detailExperimental investigation of the effect of flip bucket splitters on plunge pool geometry
Erpicum, Sébastien ULg; Archambeau, Pierre ULg; Dewals, Benjamin ULg et al

in Wasserwirtschaft (2010), 4

Flip buckets are common hydraulic structures aiming at deflecting high velocity flows to a free jet trajectory. Systematic experimental tests have been performed to assess the influence on energy ... [more ▼]

Flip buckets are common hydraulic structures aiming at deflecting high velocity flows to a free jet trajectory. Systematic experimental tests have been performed to assess the influence on energy dissipation and the plunge pool geometry of varied repartitions of splitters along the flip bucket width. In particular, it is shown that some configurations can create more erosion than a continuous channel without flip bucket. [less ▲]

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See detailLes tendinopathies et desmopathies des régions métacarpienne et –tarsienne: revue des thérapies actuelles. Seconde partie : les traitements
Verwilghen, Denis ULg; Caudron, Isabelle; Van Galen, Gaby ULg et al

in Annales de Médecine Vétérinaire (2010), 154(1), 1-15

Lesions to the horse’s tendon are very frequent and are a non negligible reason for early retirement of sport and leisure horses. For decades man has been searching for “the” treatment but unfortunately ... [more ▼]

Lesions to the horse’s tendon are very frequent and are a non negligible reason for early retirement of sport and leisure horses. For decades man has been searching for “the” treatment but unfortunately most of the known treatments have empiric bases and very few have actually proven their real efficiency. Diagnostic techniques like ultrasound allows to better evaluate the improvements made in tendonitis therapies. Stem cells and gene therapy are probably the most innovating of them, but their long-term effectiveness still has to stand the test of times. This article gives an overview of the possible treatments of tendonitis today. [less ▲]

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See detailManaging climatic risks for enhanced food security : key information capabilities
Balaghi, Riad; Badjeck, M.-C.; Djaby, Bakary ULg et al

in Procedia Environmental Sciences (2010), 1

Food security is expected to face increasing challenges from climatic risks that are more and more exacerbated by climate change, especially in the developing world. This document lists some of the main ... [more ▼]

Food security is expected to face increasing challenges from climatic risks that are more and more exacerbated by climate change, especially in the developing world. This document lists some of the main capabilities that have been recently developed, especially in the area of operational agroclimatology, for an efficient use of natural resources and a better management of climatic risks. Many countries, including the developing world, now benefit from well-trained staff in the use of climate data, physical and biological information and knowledge to reduce negative climate impacts. A significant volume of data and knowledge about climate–agriculture relationships is now available and used by students, scientists, technicians, agronomists, decision-makers and farmers alike, particularly in the areas of climate characterization, land suitability and agroecological zoning, seasonal climate forecasts, drought early warning systems and operational crop forecasting systems. Climate variability has been extensively modelled, capturing important features of the climate through applied statistical procedures, agroclimatic indices derived from raw climatic data and from remote sensing. Predictions of climate at seasonal to interannual timescales are helping decision-makers in the agricultural sector to deal more effectively with the effects of climate variability. Land suitability and agroclimatic zoning have been used in many countries for agricultural planning, thanks to the availability of new and comprehensive methodologies; developments in climate, soil and remote sensing data collection and analysis; and improved applications in geographic information systems (GIS). Drought early warning systems are available worldwide at both national and international levels. These systems are helping decisionmakers and farmers to take appropriate decisions to adapt to short-term climatic risks. Also, operational crop forecasting systems are now becoming available at the regional and national levels. In some developed countries, several efficient and well tested tools are now available for optimizing on-farm decisions based on the combination of crop simulation models and seasonal forecasts. However, in developing countries few tools have been developed to efficiently manage crops at the farm level to cope with climate variability and climate risks. Climate change impacts on agriculture and food security have been assessed in international studies using specific and efficient methodologies and tools. Adaptation to climate change and variability can also be facilitated through effective planning and implementation of strategies at the political level. The role of technological progress, risk transfer mechanisms and financial instruments and their easy accessibility to rural people are critical elements of climate risk management. [less ▲]

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See detailUnified description of fission in fusion and spallation reactions
Mancusi, Davide ULg; Charity, R. J.; Cugnon, Joseph ULg

in Physical Review. C : Nuclear Physics (2010), 82

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See detailDiversity and aboveground biomass in three tropical forest types in the Dja Biosphere Reserve, Cameroon
Djuikouo, Marie Noël Kamdem; Doucet, Jean-Louis ULg; Nguembou, Charlemagne K. et al

in African Journal of Ecology (2010), 48

We present tree community diversity, species composition, basal area and aboveground biomass of three forest types in the Dja Biosphere Reserve, in South-East Cameroon, part of the contiguous tropical ... [more ▼]

We present tree community diversity, species composition, basal area and aboveground biomass of three forest types in the Dja Biosphere Reserve, in South-East Cameroon, part of the contiguous tropical forest of the Congo Basin. A total of fourteen, 1 ha, plots were established in heterogeneous terra firme forests (TFF), Gilbertiodendron dewevrei forests (GDF) and periodically flooded forests (PFF). A total of 281 tree species with diameter ‡10 cm were recorded. The Shannon diversity index was significantly higher in TFF (5.7 ± 0.28) and PFF (5.6 ± 0.23) than in GDF (2.29 ± 0.48) (ANOVA, F2,11 = 139.75, P < 0.001). While tree density did not differ between forest types (F2,11 = 3.50, P = 0.06), basal area differed significantly (F2,11 = 7.38, P = 0.009), as did aboveground biomass (F2,11 = 17.95, P < 0.001). Mean AGB values were respectively, 596.1 ± 62.24, 401.67 ± 58.06 and 383.14 ± 61.91 Mg ha)1 in GDF, TFF and PFF. Variation in the abundance of trees with large diameter was the main reason for these differences. Few dominant species made the greatest contribution to the AGB. G. dewevrei, accounted for 83% of AGB in GDF, Penthaclethra macrophylla for 9.9% in TFF and Uapaca heudolotii for 10.6% in PFF. The importance of preserving G. dewevrei forest in the context of ‘Reducing Emissions from Deforestation and forest Degradation’ (REDD) policies is discussed. [less ▲]

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See detailL’entrepreneurship senior
Cecchini, Isabelle ULg; huby, E.; Cornet, Annie ULg

Conference (2010)

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See detailNon-isothermal infiltration in plastic bentonite
François, Bertrand ULg; Laloui, Lyesse

in Alonso, Edouardo; Gens, Antonio (Eds.) Unsaturated Soils (2010)

In deep geological repository involving a multi-barrier system, the engineered materials, generally made of bentonite, constitute an important mechanical, thermal and hydraulic barrier to prevent the ... [more ▼]

In deep geological repository involving a multi-barrier system, the engineered materials, generally made of bentonite, constitute an important mechanical, thermal and hydraulic barrier to prevent the interaction between wastes and biosphere. To better understand the THM (thermo-hydro-mechanical) processes in the clayey confining system, experimental tests must be simulated by the means of advance numerical tools. A unified thermo-mechanical constitutive model for unsaturated soils, ACMEG-TS, has been developed and implemented in the finite element code LAGAMINE. Material is considered as tri-phase non-isothermal thermo-plastic medium. The results of numerical simulations of non-isothermal infiltration tests through FEBEX bentonite are compared with the available sensors measurements and interpreted in the light of elasto-thermo-plasticity of unsaturated soils. Through those simulations, the advancements in the understanding of the involved processes brought by the ACMEG-TS model are discussed. [less ▲]

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See detailAb initio calculation of the 66 low lying electronic states of HeH+ : adiabatic and diabatic representations
Loreau, J; Liévin, J; Palmeri, P et al

in Journal of Physics : B Atomic Molecular & Optical Physics (2010), 43

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See detailA hybrid model for the simulation of angiogenesis during bone fracture healing
Geris, Liesbet ULg; Peiffer, Veronique; Gerisch, Alf et al

in Proceedings of the 17th conference of the European Society of Biomechanics (2010)

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See detailCalendrier de reboisement
Dubiez, Emilien; Proces, Pierre; Peltier, Régis et al

Book (2010)

Calendrier dont la partie détachable devient un livret de vulgarisation de techniques de reboisement

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See detailChemical Composition, Cytotoxic and Antioxydant Activity of The Essential Oil of Lavandula dentata
Imelouane, B.; El Bachiri, A.; Wathelet, Jean-Paul ULg et al

in World Journal of Chemistry (2010), 5(2), 103-110

The composiiton of the essential oil from aerial part and flowers of lavandula dentate, collected in eastern Morocco (Taforalt, Talazart), were analysed by GC/FID and GC-MS.

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See detailD’une perte de vitesse de la fonction des rituels familiaux et ses conséquences dans l’irreprésentabilité du divorce : crise identitaire familiale et thérapie palliative.
Bullens, Quentin ULg

in Thérapie Familiale (2010), 31(2), 151-166

Among the numerous changes which the notion of family has known over time, we are interested here in the normalization/acceptability of the divorce (or separation). We postulate that, in a context where ... [more ▼]

Among the numerous changes which the notion of family has known over time, we are interested here in the normalization/acceptability of the divorce (or separation). We postulate that, in a context where these modifications are less and less ritualized and thus, less and less representable, the family (whose achronic character we shall differentiate from the diachronic) has no access to a social representability/acceptability of its separations. According to us, the family suffers then from an identity crisis of which the child, sometimes on top of his individual sufferings, can be the symptom. Then it remains for the therapists to make up for this lack of representability of separations, while remaining lucid about the limits of their interventions. [less ▲]

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See detailSelf-heating of bulk high temperature superconductors of finite height subjected to a large alternating magnetic field
Laurent, Philippe; Fagnard, Jean-François ULg; Hari Babu, N. et al

in Superconductor Science and Technology (2010), 23

In this work we study, both experimentally and numerically, the self-heating of a bulk, large YBCO pellet of aspect ratio (thickness / diameter) ~ 0.4 subjected to a large AC magnetic field. To ensure ... [more ▼]

In this work we study, both experimentally and numerically, the self-heating of a bulk, large YBCO pellet of aspect ratio (thickness / diameter) ~ 0.4 subjected to a large AC magnetic field. To ensure accurate temperature measurements, the sample was placed in an experimental vacuum chamber to achieve a small and reproducible heat transfer coefficient between the superconductor and the cryogenic fluid. The temperature was measured at several locations on the sample surface during the self-heating process. The experimentally determined temperature gradients are found to be very small in this arrangement (< 0.2 K across the radius of the superconductor). The time-dependence of the average temperature T(t) is found to agree well with a theoretical prediction based on the one-dimensional (1-D) Bean model, assuming a uniform temperature in the sample. A 2-D magneto-thermal model was also used to determine the space and time-dependent temperature distribution T(r, z, t) during the application of the AC field. The losses in the bulk pellet were determined using an algorithm based on the numerical method of Brandt, which was combined with a heat diffusion algorithm implemented using a finite-difference method. The model is shown to be able to reproduce the main trends of the observed temperature evolution of the bulk sample during a self-heating process. Finally, the 2-D model is used to study the effect of a non-uniform distribution of critical current density Jc(r, z) on the losses within the bulk superconductor. [less ▲]

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