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See detailPersonnalité antisociale et psychopathologie
Englebert, Jérôme ULg

Conference (2015, July 14)

Notre communication a pour objectif de confronter les critères de la personnalité antisociale du DSM-IV et du DSM-5 à une réflexion psychopathologique. Nous commencerons par une analyse des différentes ... [more ▼]

Notre communication a pour objectif de confronter les critères de la personnalité antisociale du DSM-IV et du DSM-5 à une réflexion psychopathologique. Nous commencerons par une analyse des différentes contradictions propres au diagnostic qui nous mèneront à l’identification du critère « primaire » de cette entité qui est l’« incapacité à se conformer aux lois et normes sociales ». Nous confronterons ensuite à des situations cliniques l’hétérogénéité des profils pouvant répondre à ce diagnostic. Nos constats nous conduiront à mettre en doute la validité apparente du concept de personnalité antisociale, puisqu’il recouvre des modes de fonctionnement psychologique variés. La valeur discriminative faible, en matière de fonctionnement psychologique, suggère que c’est une dimension autre que psychopathologique qui organise ce diagnostic. Dénuée de toute attention pour les modes d’interactions, pour le vécu émotionnel et pour les états de subjectivité, la notion de personnalité antisociale ne porte pas d’intérêt à l’individu qu’elle catégorise, mais bien à l’acte délinquant commis par ce dernier. Nous conclurons sur le constat de l’absence de dimension psychopathologique de la personnalité antisociale, qui se révèle être un diagnostic principalement criminologique, à l’inverse des fondements de l’éthique psychopathologique. [less ▲]

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See detail«Aménager un environnement : bienveillance et non-vouloir»
Brahy, Rachel ULg; Servais, Véronique ULg

Conference (2015, July 14)

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See detailFeasibility-oriented Branching Strategies for Global Optimization
Gerard, Damien ULg; Köppe, Matthias; Louveaux, Quentin ULg

Conference (2015, July 13)

We study the spatial Brand-and-Bound algorithm for the global optimization of nonlinear problems. In particular we are interested in a method to find quickly good feasible solutions. Most spatial Branch ... [more ▼]

We study the spatial Brand-and-Bound algorithm for the global optimization of nonlinear problems. In particular we are interested in a method to find quickly good feasible solutions. Most spatial Branch-and-Bound-based solvers use a non global solver at a few nodes to try to find better incumbents. We show that it is possible to improve the branching rules and the nodes priority by exploiting the solutions from the non global solver. We also propose several smart adaptive strategies to choose when to run the non global solver. We show that despite the time spent in solving many more NLP problems in the nodes, the new strategies enable the algorithm to find the first good incumbents much faster and to prove the global optimality faster. NLP instances from the COCONUT library are benchmarked. All experiments are run using the open source solver Couenne. [less ▲]

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See detailPRESSÃO PARCIAL (PCO2) E FLUXO DE DIÓXIDO DE CARBONO (CO2) EM AMBIENTES DE VÁRZEA AMAZÔNICOS
Amaral, JHF; Barbosa; Kasper, D et al

Conference (2015, July 12)

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See detailEthnopharmacology and malaria in Africa
Frederich, Michel ULg; Jansen, Olivia ULg; Muganga, raymond et al

Conference (2015, July 12)

According to the last World Malaria Report [1], there were 584 000 deaths for 198 millions malaria cases worldwide in 2013. Particularly, the disease caused an estimated 437 000 African children died ... [more ▼]

According to the last World Malaria Report [1], there were 584 000 deaths for 198 millions malaria cases worldwide in 2013. Particularly, the disease caused an estimated 437 000 African children died before their fifth birthday, still in 2013. Malaria is caused by a parasite, Plasmodium sp. and transmitted by Anopheles mosquitoes. The problem of parasite resistance towards common available medicines such as chloroquine, mefloquine, quinine, is increasing. In this context, the vegetal kingdom remains the main source of pharmacologically active compounds against this parasitic infection as attested by the famous quinine, isolated from Cinchona sp., artemisinin extracted from Artemisia annua and also atovaquone derived from lapachol found in several Bignoniaceae. All these substances are related to plants with traditional use against fever and malaria. Beside these well-known examples, various new antiplasmodial compounds are frequently discovered from Nature, particularly following an ethnopharmacological approach, as reviewed by several authors in recent years [2-6]. Then, the pharmacological and phytochemical study of plants from traditional pharmacopoeias can be of first interest not only to discover new antimalarial “lead compounds”, but also to valorize local vegetal species whose efficacy and safety would have been demonstrated in laboratory and clinical investigations [7]. As demonstrated in several works from Willcox [8], better knowledge of plants from traditional pharmacopoeias and local valorization of validated traditional remedies in Improved Traditional Medicine (ITM) could allow the access to effective, standardized, available and affordable therapeutics for management of malaria by local populations. After this introductive section, the second part of the talk will be dedicated to the presentation of some results obtained in Liège with Dicoma tomentosa from Burkina-Faso [9], Strychnos icaja from Cameroun [10] and Terminalia mollis from Rwanda [11]. 1. WHO, World Malaria Report 2014, December 2014, Geneva (http://www.who.int/malaria/publications/world_malaria_report_2014/en/). 2. Batista R, Silva Ade J Jr, de Oliveira AB: Plant-derived antimalarial agents: new leads and efficient phytomedicines. Part II. Non-alkaloidal natural products. Molecules 2009, 14:3037-72. 3. Bero J, Frédérich M, Quetin-Leclercq J : Antimalarial compounds isolated from plants used in traditional medicine. Journal of Pharmacy and Pharmacology 2009, 61:1401–1433. 4. Bero J and Quetin-Leclercq J: Natural products published in 2009 from plants traditionally used to treat malaria. Planta Medica 2011, 77:631-40. 5. Kaur K, Jain M, Kaur T, Jain R: Antimalarials from nature. Bioorganic & Medicinal Chemistry 2009, 17:3229–3256. 6. Nogueira CR and Lopes LMX: Antiplasmodial Natural Products. Molecules 2011, 16:2146-2190 7. Ginsburg H and Deharo E: A call for using natural compounds in the development of new antimalarial treatments – an introduction. Malaria Journal 2011, 10 (suppl. 1):S1 8. Willcox M, Graz B, Falquet J, Diakite C, Giani S, Diallo D: A “reverse pharmacology” approach for developing an antimalarial phytomedicine. Malaria journal 2011, 10(suppl1):S8 9. Jansen, O., Tits, M., Angenot, L., Nicolas, J.-P., De Mol, P., Nikiema, J.-B., & Frédérich, M : Anti-plasmodial activity of Dicoma tomentosa (Asteraceae) and identification of urospermal A-15-O-acetate as the main active compound. Malaria Journal 2012, 11, 289. 10. Tchinda, A. T., Jansen, O., Nyemb, J.-N., Tits, M., Dive, G., Angenot, L., & Frédérich, M. Strychnobaillonine, an unsymmetrical bisindole alkaloid with an unprecedented skeleton from Strychnos icaja roots. Journal of Natural Products 2014, 77(4), 1078–82. 11. Muganga, R., Angenot, L., Tits, M., & Frédérich, M : In vitro and in vivo antiplasmodial activity of three Rwandan medicinal plants and identification of their active compounds. Planta Medica 2013, 80(6), 482-489. [less ▲]

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See detailDeterministic Manufacturing constraints for Optimal Distribution in the Case of Additive Manufacturing
Bauduin, Simon ULg; Collet, Maxime ULg; Duysinx, Pierre ULg et al

Conference (2015, July 09)

An overview of the difficulties of coupling additive manufacturing to topology optimization with various solution founded and implemented.

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See detailAlgorithmic aspects of converting surface mesh data to volumetric images
Plougonven, Erwan ULg; Léonard, Angélique ULg

Conference (2015, July 09)

In image analysis, some processes might imply a change or conversion in the structure of the data. The structure types will depend on the processing method and applications, and can consist of pixel data ... [more ▼]

In image analysis, some processes might imply a change or conversion in the structure of the data. The structure types will depend on the processing method and applications, and can consist of pixel data, point sets, finite elements, vector fields, implicit surfaces, graphs, basic shapes (spheres, cylinders, or cubes), etc. The work presented here discusses the problem of converting a triangulated surface mesh to a 3D image, a need that arises for example when using active surface-type segmentation methods of 3D images, shape-fitting, or combining data from laser surface scanning with 3D imaging. During the course of numerous projects, two main classes of mesh-to-image conversions have appeared: those identifying voxels (pixels in a 3D image) that intersect the mesh, or voxels that are contained in the mesh, supposing it defines a closed surface. [less ▲]

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See detailSimplified fatigue resistance in mechanical engineering using topology optimization
Collet, Maxime ULg; Bruggi, Matteo; Bauduin, Simon ULg et al

Conference (2015, July 09)

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See detailA probabilistic multi-scale model for polycrystalline MEMS resonators
Lucas, Vincent ULg; Wu, Ling ULg; Paquay, Stéphane et al

Conference (2015, July 09)

The size of micro-electro-mechanical systems (MEMS) is only one or two orders of magnitude higher than the size of their micro-structure, i.e. their grain size. As a result, the structural properties ... [more ▼]

The size of micro-electro-mechanical systems (MEMS) is only one or two orders of magnitude higher than the size of their micro-structure, i.e. their grain size. As a result, the structural properties exhibit a scatter. As an example we study the beam resonator illustrated in Fig. 1(a), made of poly-silicon material, in which each grain has a random orientation. Solving the problem with a full direct numerical simulation combined to a Monte-Carlo method allows the probability density function to be computed as illustrated in Fig. 1(b). However this methodology is computationally expensive due to the number of degrees of freedom required to study one sample, motivating the development of a non-deterministic 3-scale approach [3]. In a multiscale approach, at each macro-point of the macro-structure, the resolution of a microscale boundary value problem relates the macro-stress tensor to the macro-strain tensor. At the micro-level, the macro-point is viewed as the center of a Representative Volume Element (RVE). The resolution of the micro-scale boundary problem can be performed using finite-element simulations, as in the computational homogenization framework, e.g. [2]. However, to be representative, the micro-volume-element should have a size much bigger than the microstructure size. In the context of the MEMS resonator, this representativity is lost and Statistical Volume Elements (SVE) are considered. These SVEs are generated under the form of a Voronoi tessellation with a random orientation for each silicon grain. Hence, a Monte-Carlo procedure combined with a homogenization technique allows a distribution of the material tensor at the meso-scale to be estimated. The correlation between the meso-scale material tensors of two SVEs separated by a given distance can also be evaluated. A generator at the meso-scale based on the spectral method [4] is implemented. The generator [3] accounts for a lower bound [1] of the meso-scale material tensor in order to ensure the existence of the second-order moment of the Frobenius norm of the generated material tensor inverse [5]. Using the random meso-scale field obtained with the meso-scale generator, which accounts for the spatial correlation, a Monte-Carlo method can be used at the macro-scale to predict the probabilistic behavior of the MEMS resonator. [less ▲]

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See detailDe "Poétique" à "Points Essais" : (ré)invention du livre ?
Lorent, Fanny ULg

Conference (2015, July 08)

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See detailAttitudes toward Gay and Lesbian Marriage and Parenting in Italy
Baiocco, Roberto; D'Amore, Salvatore ULg; Green, Robert-Jay et al

Conference (2015, July 08)

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See detailShewhart Control Charts with Guaranteed In-Control Performance
Faraz, Alireza ULg; Heuchenne, Cédric ULg; Woodall, W.H.

Conference (2015, July 08)

The in-control performance of the Shewhart X ̅ and S2 control charts with estimated in-control parameters has been evaluated by a number of authors. Results indicate an unrealistically large amount of ... [more ▼]

The in-control performance of the Shewhart X ̅ and S2 control charts with estimated in-control parameters has been evaluated by a number of authors. Results indicate an unrealistically large amount of Phase I data is needed to have the desired in-control average run length (ARL) value in Phase II. To overcome this problem, it has been recommended that the control limits be adjusted based on a bootstrap method to guarantee that the in-control ARL is at least a specified value with a certain specified probability. In our paper we present simple formulas for the required control limits so that practitioners do not have to use the bootstrap method. An assumption of normality is required. The advantage of our proposed method is in its simplicity; there is no bootstrapping and the control chart constants do not depend on the Phase I sample data. [less ▲]

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See detailBeyond indiscipline of Labor Market Intermediaries : The Case of Public Employment Services and Private Providers Partnerships
Remy, Céline ULg; Beuker, Laura ULg; Gérard, Julie ULg

Conference (2015, July 08)

Following the economic and social changes in the countries of the European Union (liberalization requirements, crisis of the welfare State, diversification of users expectations, etc.), compelling ... [more ▼]

Following the economic and social changes in the countries of the European Union (liberalization requirements, crisis of the welfare State, diversification of users expectations, etc.), compelling readability needs and modernization of Public Employment Services (PES) have appeared. Meanwhile, a spectacular growth of private employment operators - market and non-market - was recognized by the International Labor Organization in all member states, in order to respond effectively to the increased requests of support and training for the beneficiaries of the PES. In this new context, PES are invited by the European Union (EU) – particularly through its multiple directives – to rethink and reposition their traditional activities of placement, training and support for jobseekers according to a "mixed" management of the labor market. Therefore, PES entrust operation and management of their activities to private providers, as part of a contractual agreement. In this way, these operators provide a "back office function for SPE via a system of delegation governed by a specific division of labor formalized in a partnership agreement between PES and the private provider". Thus, these private labor market intermediaries (LMI’s) as active members on the public orders market work both on their own behalf and on behalf of the public authority. These new collaborations, qualified public-private partnerships (PPPs), allow PES to outsource and delegate a part of their missions they could not achieve internally. So PES combine the role of "actor" and the role of "manager" / "principal" in the labor market. To facilitate the coordination of their activities with the private sector, PES made the decision to create a partnerships service. The officers of this service have the mission to oversee this new form of regulation of the labor market. While collaboration rules are initially determined by the PES, the agents are required to implement them and have the private operators following them. Our interest is to study how these actors – or stakeholder of the PPPs – implement this public action device. Despite differences in both organizational and cultural (for instance bureaucratic rigidity versus informal structure, constraint reporting, management autonomy, etc.), public and private actors work together to serve community and beneficiaries of the PES for their professional integration in the labor market. To analyze how these actors interact and live the partnership relationship, established between agreement and disagreement, we will rely on the economy of conventions and especially on the theoretical contributions of the Theory of justification. In this way, we will identify the different logics of action (present in the merchant, civic, industrial worlds, etc.) that guide the practices of stakeholders, from their discourse and in particular the underlying arguments to justify their actions. Our analysis is rooted in empirical material composed of semi-structured interviews (N=89) and various observations of interactions made within the partnership services and with providers (N=132). These observations focused on three key moments in the life of the partnership: the selection of projects, the monitoring and evaluation of projects by the agents. With this approach, our goal is twofold. On the one hand, we want to highlight the moments when the actors "interpret" the regulatory framework that structure their actions within the partnership relationship. On the other hand, we want to understand the arguments used by actors to justify and legitimize their indiscipline. [less ▲]

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See detailAttitudes toward Gay and Lesbian Marriage and Parenting Across Seven European Countries
D'Amore, Salvatore ULg; Green, Robert-Jay; Katzuny, Katy et al

Conference (2015, July 08)

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See detailLa presse vidéoludique française : périodisation et enjeux
Dozo, Björn-Olav ULg

Conference (2015, July 08)

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See detailCitizen Science and Democratic Citizenship
Van Oudheusden, Michiel ULg; Meyer, Morgan

Conference (2015, July 08)

Citizen science (CS) is now widely recognized as a scienti c research practice that engages "nonscientists," such as journalists, artists, hackers, and entrepreneurs. Examples of CS include amateur ... [more ▼]

Citizen science (CS) is now widely recognized as a scienti c research practice that engages "nonscientists," such as journalists, artists, hackers, and entrepreneurs. Examples of CS include amateur astronomy, biohacking, video gaming, and ornithology, among many others. As many of these practices serve public purposes (e.g. educational goals) and emanate within participatory cultures (e.g. the open science movement), CS can be inscribed in a politics of openness, transparency, and inclusion. These politics are potentially reinforced by the policy uptake of CS (e.g. EU White Paper on CS). Yet, despite its growing public significance and potential to render science more inclusive, CS embeds divergent, often conicting, assumptions about the means and ends of science and the role of the citizen/scientist in contemporary democracy. For instance, in its 'purest' form, CS emerges as a reaction against industry and institutional science, in so far as these institutes are seen to inhibit open knowledge sharing. On the other hand, CS sometimes links to commercial endeavors. CS should thus be approached as a multilayered practice that has the power to reshape existing policies, categories, and identities. Taking these reflections into consideration, this panel asks how CS (re)constructs the contemporary citizen, scientist, and citizen scientist. How are citizens transformed into active 'co-creators' of science? Which political rights do citizen scientists claim, as individuals or as groups? Which tools do citizen scientists mobilize to build communities around scientific endeavor? How local or global are the politics of CS? How do policymakers act as facilitators, patrons, or challengers of a more collective, open science? These questions demand critical attention, as CS is performative of democratic citizenship. The panel's questions resonate with the following conference themes: How are publics constructed by policies? To what extent are groups and identities shaped in the policymaking process? How do publics express themselves? [less ▲]

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See detailCO2-sourced non-isocyanate polyurethanes: from the monomer synthesis to the elaboration of polymeric materials
Gennen, Sandro ULg; Grignard, Bruno ULg; Gilbert, Bernard ULg et al

Conference (2015, July 07)

Due to problems related to the rarefaction of fossil resources and the global warming that comes from CO2 emissions, new carbon feedstocks that are abundant, renewable, non-toxic, inexpensive and ... [more ▼]

Due to problems related to the rarefaction of fossil resources and the global warming that comes from CO2 emissions, new carbon feedstocks that are abundant, renewable, non-toxic, inexpensive and environmentally friendly must be explored to produce chemicals. Besides the valorization of bio-based raw materials, the use of CO2 as a C1 carbon source into added-value products has gained interest in both academic and industrial fields. One promising way to valorize CO2 relies on its chemical fixation onto epoxides to produce cyclic carbonates that find applications as electrolytes in lithium ion batteries, as aprotic polar solvents or as useful intermediates for polycarbonates. Cyclic carbonates also react with primary amines to produce 2-hydroxyethylurethane. This reaction can be extrapolated to the synthesis of non-isocyanate polyurethanes (NIPU) by polyaddition of bifunctional cyclic carbonates with diamines.5 This study focusses on (i) the synthesis of cyclic carbonates using new highly efficient organocatalysts and (ii) their valorization as monomers to produce non-isocyanate polyurethanes. First, we have identified a bicomponent organocatalyst for the very fast synthesis of cyclic carbonates from CO2 and epoxides under very mild reaction conditions. Kinetics of reactions were followed by online Raman spectroscopy. NMR titrations were realized to evidence the mechanism of activation of this novel organocatalytic system that will be discussed in detail this talk. The second objective relies on the development of new efficient organocatalysts for the synthesis of high molar masses NIPUs in short reaction times. Organic compounds interacting with the cyclic carbonate by hydrogen bonding were identified and their catalytic activity was highlighted by a model reaction between ethylene carbonate and a primary amine before extrapolation to the synthesis of NIPUs that find applications as coatings or foamed materials. [less ▲]

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See detailTreatments for patients with disorders of consciousness
Thibaut, Aurore ULg

Conference (2015, July 07)

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See detailStress constrained topology optimization for additive manufacturing: Specific character and solution aspects
Duysinx, Pierre ULg

Conference (2015, July 07)

Since the fundamental work by Bendsøe and Kikuchi (1988), topology optimization has been based on compliance type formulations (Bendsoe & Sigmund, 2003) while the number of works considering stress ... [more ▼]

Since the fundamental work by Bendsøe and Kikuchi (1988), topology optimization has been based on compliance type formulations (Bendsoe & Sigmund, 2003) while the number of works considering stress constraints are rather limited (Duysinx & Bendsoe, 1998). More recently the generalized shape optimization approach using level set methods (see for instance Allaire, Jouve, Troader, 2004, Belytchko, Xiao, Parimi, 2003) has followed the tracks of topology optimization and has mainly been focusing on compliance minimization problems. The ‘compliance type’ formulation has produced quite interesting results in many problems because controlling the energy and the displacements under the loads is generally favourable for deflection control and because, for one load case, the compliance minimization leads to a fully stressed design nearly everywhere in the structure. However there are theoretical results that clearly show that the strongest and the stiffest structural layout can be quite different. As demonstrated in Rozvany & Birker (1994) truss topology optimization can lead to different results when there are several load cases, different stress limits in tension and compression, or when there are several materials involved. Therefore, the first goal of the paper points out the importance of considering stress constraints as soon as the preliminary design phase, that is, to include stress constraints in the topology optimization problem. Revisiting some contributions of the authors, this paper aims at illustrating the key role of stress constraints in the framework of topology optimization of continuum structures. The recent developments are able to treat: • Integrated stress criteria (i.e. global) relaxed stress constraints that aggregate the stress constraints in each finite element in order to be able to circumvent the large scale character of the local stress constraints. • Stress criteria that are able to tackle non equal stress limits in tension and compression. The usual von Mises criterion is unable to predict real-life designs when the structure is made of materials with unequal stress limits like concrete or composite materials. These different behaviours in tension and compression result in quite specific designs. Numerical applications make possible to point out the different nature of structural lay out for maximum strength and maximum stiffness. This one is clearly demonstrated in two kinds of particular situations: once several load cases are considered and when unequal stress limits in tension and compression are involved. The second contribution of the paper deals with the solution aspects of large scale constrained optimization problems. Because of the huge number of design variables, dual methods combined with local convex approximations such as CONLIN (Fleury, 1989) or MMA (Svanberg, 1987) are well indicated to solve classical topology optimization methods. However stress constrained problems introduce also a so large number of active constraints that one comes to a rather delicate situation. We show that the optimizer effort increases mostly as the cube of the number of constraints. In order to circumvent the problem, the idea developed in the paper is to combine first or second order approximations (Bruyneel, Duysinx, Fleury, 2002) with zero order approximations of stress constraints, especially for the subset of restrictions that are likely not to be active or not to change too fast. At first the paper presents the way to derive zero-order approximations of -relaxed stress constraints (that is necessary to cope with the singularity phenomenon of stress constraints in topology optimization). Then the proposed hybrid approach mixing approximation of different orders is benchmarked on numerical applications illustrating the reduction of computation time for solving optimization problems without sacrifying to the robustness and efficiency. Numerical applications will investigate topology optimized benchmark examples combined with additive manufacturing fabrication to illustrate the developments. [less ▲]

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See detailA Non-Local Damage-Enhanced Incremental-Secant Mean-Field-Homogenization For Composite Laminate Failure Predictions
Wu, Ling ULg; Adam, Laurent; Doghri, Issam et al

Conference (2015, July 06)

Recently, the authors have presented an incremental-secant mean-field homogenisation (MFH) process for non-linear composite materials [4]. In this formulation, a virtual elastic unloading is applied to ... [more ▼]

Recently, the authors have presented an incremental-secant mean-field homogenisation (MFH) process for non-linear composite materials [4]. In this formulation, a virtual elastic unloading is applied to evaluate the virtual residual stress and strain states reached in each elasto-plastic phase. These virtual states are then used as a starting point to apply a secant homogenization method. This incremental-secant MFH process can handle non-proportional and nonmonotonic loadings, and naturally possesses an isotropic instantaneous stiffness operator to be used in the Eshelby tensor. This incremental-secant MFH homogenization can account for the first and second statistical moment estimation of the current yield stress in the composite phases during the computation of the plastic flow. When accounting for a second statistical moment estimation, the plastic yield in the composite material phases is captured with a higher accuracy, improving the predictions, mainly in the case of short fiber composite materials [6], see Fig. 1(a). The incremental MFH can handle material softening when extended to include a damage model. Indeed, as the secant formulation is applied from an unloaded state, the inclusion phase can be elastically unloaded during the softening of the matrix phase, contrarily to the case of the incremental-tangent method [3, 5], see Fig. 1(b). Moreover, when formulating the damage model in the composite phases in a non-local way, as with the non-local implicit approach, [1, 2], the MFH scheme can be used to model strain localization in composite structures [5], without suffering from the loss of the solution uniqueness. [less ▲]

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See detailEfficient hydrogen-bond donor activators for the synthesis of bio-based cyclic carbonates from CO2 and vegetable oils: a combined in-situ FT-IR and DFT study
Alves, Margot ULg; Méreau, Raphaël; Grignard, Bruno ULg et al

Conference (2015, July 06)

The present research aims at developing new very efficient organocatalysts for the chemical fixation of carbon dioxide onto epoxides that are precursors of non-isocyanate polyurethanes (NIPUs). Although ... [more ▼]

The present research aims at developing new very efficient organocatalysts for the chemical fixation of carbon dioxide onto epoxides that are precursors of non-isocyanate polyurethanes (NIPUs). Although this area of research is the subject of many works, the catalytic performance must be further enhanced in particular for the carbonatation of vegetable-based precursors while respecting environmental standards. In this context, we developed a new organocatalytic platform based on the combination of ammonium salts with single or double hydrogen bond donor activators that showed unexpected catalytic activity for the fast addition of CO2 onto epoxidized oils under mild conditions. First of all, in situ kinetic studies of the cycloaddition of CO2 onto model epoxidized oils were monitored by FT-IR spectroscopy in order to evaluate the influence of the hydrogen bond structure and various parameters such as the pressure, the temperature, the catalyst loading, and the nature of the epoxide on the reaction kinetics. Thanks to this catalyst screening, we found that ammonium salt/fluorinated hydrogen bond donors bicomponent organocatalysts were by far more efficient than that proposed in the literature under mild conditions (60°C, 2MPa). Then, the reaction mechanism of the organocatalyzed cycloaddition of propylene oxide onto CO2 was elucidated by performing Density Functional Theory (DFT). Our theoretical results highlighted the key role of the hydrogen bond interaction between the epoxide and the activators for the enhancement of the catalytic platform’s efficiency. [less ▲]

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See detailPhytoplankton abundance and diversity in the Congo river at high and low waters
Stoyneva, MP; Descy, JP; Bouillon, S et al

Conference (2015, July 05)

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See detailLa paix de Westphalie (1648) : une rupture dans l’histoire diplomatique du Saint-Siège ? Confessionnalisation et médiation pontificale en question.
Regibeau, Julien ULg

Conference (2015, July 04)

La signature des traités de Westphalie, en 1648, a longtemps été considérée comme une rupture nette dans l’histoire politico-religieuse. Elle aurait conduit à l’effondrement de la christianitas médiévale ... [more ▼]

La signature des traités de Westphalie, en 1648, a longtemps été considérée comme une rupture nette dans l’histoire politico-religieuse. Elle aurait conduit à l’effondrement de la christianitas médiévale et à la naissance de l’Europe des États modernes . Ce changement de paradigme supposerait l’échec à long terme de la politique du Saint-Siège. L’historiographie récente permet cependant de revoir cette double interprétation, montrant notamment que le rôle diplomatique joué par Rome lors des négociations en Westphalie est plus complexe. Le but de ma communication est de réévaluer la théorie qui voudrait que la paix de Westphalie soit une rupture pour l’histoire des relations internationales et, par voie de conséquence, pour la diplomatie pontificale. Premièrement, je mets en avant les critères qui poussent régulièrement les historiens à envisager cette paix comme une défaite de Rome. Cette première partie m’entraine ensuite à définir rapidement le concept de confessionnalisation des relations internationales et à montrer qu’il est aujourd’hui réinterrogé par la recherche. Ce concept fait de la lutte confessionnelle le principal facteur structurant les relations internationales entre 1550 et 1650. Or il semble aujourd’hui peu à même d’expliquer toute la diversité des discours et des pratiques qui apparaissent alors dans les correspondances diplomatiques, y compris celles des ambassadeurs du Saint-Siège. Dans un troisième temps, je me concentre plus spécifiquement sur la figure du pape comme padre comune des princes catholiques et donc médiateur de leurs conflits. Ce rôle mérite d’être appréhendé dans le détail de chaque négociation. L’étude de la médiation des nonces ordinaires à l’époque des congrès en Westphalie permettrait ainsi de proposer une nouvelle lecture du rôle joué par la papauté à l’occasion de cette paix. Cela permettrait également d’adjoindre, à la temporalité de la confessionnalisation, d’autres temporalités parallèles. [less ▲]

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See detail« Folded time » : le temps en héritage dans l’œuvre de Gail Jones
Belleflamme, Valérie-Anne ULg

Conference (2015, July 04)

« Folded time » : le temps en héritage dans l’œuvre de Gail Jones The photograph of someone one loves, as a child: folded time. The present is given adorable density; in the face of the beloved rests an ... [more ▼]

« Folded time » : le temps en héritage dans l’œuvre de Gail Jones The photograph of someone one loves, as a child: folded time. The present is given adorable density; in the face of the beloved rests an earlier face. (Gail Jones, Dreams of Speaking, p. 37) Le temps pour Gail Jones n’est ni chronologique, ni linéaire, ni cyclique : telles des couches mémorielles se superposant les unes par rapport aux autres sans pour autant s’additionner, le temps, selon Jones, est « folded » (plissé, replié) et le moment présent n’est que le résultat d’un long processus de soustractions. Romancière, nouvelliste et essayiste australienne, Gail Jones est aussi une contemporaine de la fameuse « réconciliation australienne ». Du fait de son identité « blanche » et ses origines « européennes », Jones s’inscrit ainsi dans une lignée d’écrivains confrontés aux dangers liés à la victimisation symptomatique des cultures colonisatrices à l’époque postcoloniale. Afin d’aborder la question de la légitimité de l’héritage culturel, linguistique, littéraire et historique dans les récits traumatiques, sans pour autant assimiler le rôle réparateur des témoignages des victimes au rôle rédempteur des récits traumatiques des exterminateurs, Jones joue avec la notion de temporalité. C’est en effet au travers de son œuvre romanesque que Jones montre comment l’émergence d’événements du passé met en lumière un pan de l’histoire de l’Australie qui, jusqu’ici, fut passé sous silence. De même, dans une interview, Jones a exprimé son envie d’écrire sur l’amnésie historique, sur ce que c’est que d’oublier, d’avoir une histoire lacunaire (voir Block 2). Son but, je pense, n’est pas tant de combler le vide au centre de l’Histoire de l’Australie que d’écrire sur ce phénomène typiquement (post)colonial. Mon exposé s’attachera donc à montrer par quels moyens techniques et littéraires Jones tente de faire résonner les dangers récurrents liés à l’écriture et à la transmission orale de l’indicible dans la littérature contemporaine de l’Australie colonisatrice. Jones, je soutiens, fait preuve de grande subtilité à l’égard des sujets souvent très délicats que sont l’indigénéité, la marginalité, le racisme, le trauma, la victimisation et la violence, pour n’en citer que quelques uns, en ayant recours à des techniques d’écriture originales et contre-discursives, dont l’allégorie et l’intertextualité. Par ailleurs, son approche de la temporalité, tant au niveau de la forme (fragments, flashbacks, points de vue) que du contenu (troubles de la mémoire, héritage) et sa conception soustractive de l’histoire contribuent au caractère unique de sa vision du monde et de son écriture. [less ▲]

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See detailGerard du Frattre, oeuvre de transition entre les périodes médiévale et renaissante
Lambert, Adelaïde ULg

Conference (2015, July 04)

Gérard du Frattre est une compilation épique contenue dans le manuscrit inédit Paris, BnF, fr. 12791, copié à Paris en 1525 par Jacques Le Gros. Cette œuvre rassemble trois réfections en prose de chansons ... [more ▼]

Gérard du Frattre est une compilation épique contenue dans le manuscrit inédit Paris, BnF, fr. 12791, copié à Paris en 1525 par Jacques Le Gros. Cette œuvre rassemble trois réfections en prose de chansons de geste du XIIe siècle : Fierabras, la Chanson d’Aspremont et le Pèlerinage de Charlemagne. Bien que n’ayant jamais été imprimé, ce vaste ensemble est à l’origine de Gérard d’Euphrate de Jean Maugin, sorti des presses des éditeurs des Amadis en 1549, qui construit à rebours les enfances du héros Gérard et se présente comme le premier tome d’une série de six livres. Si les cinq volumes suivants n’ont jamais vu le jour, le contenu du manuscrit correspond à la suite de la narration de l’imprimé, ce qui pourrait suggérer un vaste projet éditorial avorté (Cooper, 2014). Dans un premier temps, cette intervention avait pour objectif de souligner l’apport de Gérard du Frattre à la question du découpage de la temporalité, ainsi que d’éprouver les premières pistes méthodologiques que ce texte hybride permet d’envisager et que nous souhaiterions aborder dans notre projet de thèse, qui consiste en l’édition et l’étude de l’œuvre. Ainsi, parallèlement à la pérennité de matières médiévales, la variation formelle — le passage à la prose puis à l’imprimé — reconfigure progressivement la structure et l’écriture du genre épique. Dans un second temps, c’est sur la question de la rupture engendrée par l’apparition de l’imprimerie que s’est centré notre exposé. La majorité des textes épiques popularisés par ce nouveau média est issue d’un corpus de mises en prose, dont le ms. Paris, BnF, fr. 12791 est l’un des derniers nés. La collation du chapitre initial de Gérard du Frattre avec celui de Gérard d’Euphrate nous a permis d’épingler quelques cas de rajeunissements stylistiques, et surtout de souligner la dépendance de l’imprimé au manuscrit et à la tradition épique antérieure, cela malgré la présentation typographique et iconographique adoptée par Gérard d’Euphrate, qui l’éloigne de la veine des « vieux romans » pour l’assimiler à celle des Amadis. Cet écart par rapport au « parcours classique » des épopées tardives suggère en outre un nouvel horizon d’attente et illustre de façon exemplaire la nature protéiforme du genre épique. [less ▲]

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See detailLimites temporelles et conceptualisation de l'écrivain
Daubercies, Laurence ULg

Conference (2015, July 04)

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See detailThe choice of the cooperative legal form: Any rationality?
Dufays, Frédéric ULg; O'Shea, Noreen

Conference (2015, July 04)

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See detailL'influence des facteurs de la distance psychique sur la relation d'agence en chaîne dans le monde des ONG
Manirambona, Célestin ULg

Conference (2015, July 03)

Several studies have been done on the agency relationship in the social economy (Spear, R., 2004; Huybrechts, et al, 2013.), but few studies focused on the chain agency relationship (Jegers,M. et al.,2012 ... [more ▼]

Several studies have been done on the agency relationship in the social economy (Spear, R., 2004; Huybrechts, et al, 2013.), but few studies focused on the chain agency relationship (Jegers,M. et al.,2012). Recently, Manirambona, C.(2013) showed that a chain agency relationship has materialized in Africa through the financing circuit of the actors in relation: foreign donors-international NGOs-local NGOs-endogenous groups-beneficiaries. By essence, an agency relationship exists when the mandate delegates to the mandatory a portion of his authority (Jensen & Meckling, W.H.,1976). This problem happens whenever there is the presence of elements that affect the basic assumptions of the agency relationship such as opportunism, asymmetric information (Nyssen, M.,1998). Among these ones, there are elements of context, which result from the distance. The distance has attracted more interest in the literature on the company internationalization by approaching through the psychic distance concepts (Johanson et Vahlne,1977). The basic principle of most of the researches is that increasing the distance increases uncertainty and a potential risk of information asymmetry between partners in relation (Hutzschenreuter et al., 2014). Given this impressive literature addressing the concept of psychic distance leads to a high complexity of information asymmetry strengthening the agency problem in international trade, it is striking that we lack a literature of psychic distance effect on the agency relationship in social economy, even less when the latter is in Chain. So, we ask then the question of how the psychic distance influences the agency relationship between different levels of actors in relation in the NGO world. This study proposes a combination of differentiated theories between economic, socio-cultural theories and agency theory, thus an empirical examination through a case study of the factors influence of the psychic distance components (cultural, governance and economic distances) on the agency relationship. [less ▲]

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See detailSynécismes et transformations du paysage religieux en Grèce antique
Palamidis, Alaya ULg

Conference (2015, July 03)

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See detailSurveillants et directeurs de prison. Quand les malentendus montent au Conseil d’Etat
Dubois, Christophe ULg; Colemans, Julie ULg

Conference (2015, July 03)

Le droit est souvent considéré par ses analystes comme un langage performatif (Bourcier et Mackay, 1992) : c’est par le travail d’interprétation des professionnels qu’il émerge et se perpétue. Par ... [more ▼]

Le droit est souvent considéré par ses analystes comme un langage performatif (Bourcier et Mackay, 1992) : c’est par le travail d’interprétation des professionnels qu’il émerge et se perpétue. Par ailleurs, le procès s’inscrit dans un processus de construction de sens à partir de points de vue qui entrent en conflit. La question du sens est donc incontournable pour comprendre les pratiques juridiques. Nous opérationnaliserons le concept de « sensemaking » développé par Weick (1995) pour rendre compte de quatre arrêts rendus en 2013 par le Conseil d’Etat sur des mesures disciplinaires prises par l’administration pénitentiaire à l’encontre de surveillants. Ces processus de décisionnels se composent des pratiques par lesquelles les conseillers et les auditeurs : reconstituent un historique de la décision administrative contestée à travers les pièces qui leur sont soumises ; sélectionnent des faits, des pièces et des arguments de droit pertinents ; labellisent et qualifient les faits sélectionnés ; articulent deux temporalités afin de comprendre ce qu’il s’est passé et dégagent des pistes d’action pour l’avenir immédiat ; articulent une interprétation congruente entre le droit, les faits, le dossier et la jurisprudence. A travers ces pratiques, une méthode de travail retiendra particulièrement notre attention car elle constitue une méthode heuristique de recherche du non-sens. Le magistrat est en effet attentif, lors du traitement de l’affaire, aux incohérences et aux malentendus qui émaillent la communication entre les parties lors de la procédure contentieuse. Ce repérage du non-sens est un levier d’action central dans le processus décisionnel. L’objectif de cette contribution consiste à rendre compte du processus de sensemaking qui oriente progressivement le travail du directeur de prison (autorité hiérarchique qui identifie et définit une situation problématique pour ensuite décider d’une sanction), du Comité de Direction de l’administration centrale (administration centrale qui formalise la sanction), du requérant (surveillant qui conteste la sanction) et, enfin, du Conseil d’Etat, institution qui décide d’annuler ou de suspendre la sanction. Au-delà des processus communicationnel, cette étude permettra d’appréhender les processus d’action publique et de judiciarisation dans le champ carcéral. [less ▲]

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See detailChristianisme et paideia dans l’Égypte byzantine : transitions, continuités et ruptures d’après les papyrus scolaires grecs à contenu composite profane et chrétien (fin du IIIe s. de notre ère – 1e moitié du VIIIe s.)
Carlig, Nathan ULg

Conference (2015, July 03)

Conquise en 332 avant notre ère par Alexandre le Grand, l’Égypte pharaonique est alors devenue une terre hellénisée, où la culture grecque, la paideia, et la langue grecque s’implantent profondément ... [more ▼]

Conquise en 332 avant notre ère par Alexandre le Grand, l’Égypte pharaonique est alors devenue une terre hellénisée, où la culture grecque, la paideia, et la langue grecque s’implantent profondément. L’annexion du Pays du Nil à l’empire romain en 30 avant notre ère ne changea pas cet état de chose : le grec resta la langue la plus utilisée, tandis que l’usage du latin restait confiné à l’armée et à la haute administration. Documentée par des milliers de papyrus, restes de livres ou de documents, dont les plus anciens remontent à la fin du IIe siècle de notre ère, la christianisation de l’Égypte a longtemps été perçue comme un phénomène ayant éradiqué la paideia hellénique, marquant une rupture nette entre la période gréco-romaine, de tradition profane, et la période byzantine, chrétienne. Or, à l’examen des papyrus littéraires et, dans une moindre mesure, documentaires, ainsi que des autres sources (littéraires et épigraphiques notamment), il apparaît que la christianisation du Pays du Nil s’est effectuée petit à petit, sur une période allant du Ier siècle au VIe siècle de notre ère, et que la paideia a survécu aux côtés de la culture chrétienne. S’il est un aspect de la société égyptienne qui illustre parfaitement ce phénomène, c’est l’enseignement. Si le livre de R. Cribiore paru en 1996 a fourni le catalogue de 412 papyrus scolaires profanes et la première synthèse sur le sujet , les 105 papyrus scolaires n’ont été répertoriés et étudies de façon systématique que très récemment . Ainsi, dans cette communication, après avoir présenté le cursus scolaire antique et les sources papyrologiques qui nous permettent de l’appréhender, nous nous concentrerons sur l’étude de quinze papyrus, tablettes de bois, parchemins et ostraca scolaires à contenu composite profane et chrétien, provenant d’Égypte et datés de la fin du IIIe siècle à la première moitié du VIIIe siècle de notre ère. Après avoir défini la notion de « composite », en nous fondant sur les travaux de M. Choat et A. Luijendijk portant sur les indices de christianisme dans les papyrus, surtout documentaires , l’examen externe et interne des quinze pièces (forme et matériau du support, contenu, mise en page, paléographie) permettra d’illustrer selon quelle(s) modalité(s) la culture chrétienne s’est intégrée à la paideia hellénique, de même que les transitions, continuités et ruptures dans les pratiques d’enseignement, en démontrant que l’opposition entre école païenne et chrétienne n’a pas lieu d’être en Égypte byzantine et que le découpage de la chronologie égyptienne en périodes gréco-romaine, byzantine et arabe, s’il est commode, ne doit pas constituer une barrière épistémologique pour le chercheur. [less ▲]

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See detailSurveillance à long terme de l'atmosphère terrestre depuis la station du Jungfraujoch
Mahieu, Emmanuel ULg

Conference (2015, July 02)

Nous présentons une vue d'ensemble des activités menées par les chercheurs de l'Université de Liège à la station scientifique internationale du Jungfraujoch, depuis les observations infrarouges pionnières ... [more ▼]

Nous présentons une vue d'ensemble des activités menées par les chercheurs de l'Université de Liège à la station scientifique internationale du Jungfraujoch, depuis les observations infrarouges pionnières effectuées à ce site par le Pr Migeotte en 1950-1951. L'accent est mis sur les données géophysiques et les séries temporelles déduites pour les constituants de l'atmosphère influençant le climat. [less ▲]

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See detailEvaluation de la vulnérabilité et du risque associés à la sécheresse des nappes phréatiques en Belgique : simulation de la recharge au niveau des zones agricoles avec le modèle B-CGMS
Jacquemin, Ingrid ULg; Verbeiren, Boud; Uljee, Inge et al

Conference (2015, July 02)

Groundwater drought remains poorly studied under temperate climate. The GroWaDRISK project aims at covering this gap by studying the influencing factors and the drought-related impacts on the environment ... [more ▼]

Groundwater drought remains poorly studied under temperate climate. The GroWaDRISK project aims at covering this gap by studying the influencing factors and the drought-related impacts on the environment, water supply and agriculture in the area of the Dijle and Demer catchment. In order to evaluate the current recharge (1980-2012), both models B-CGMS and WetSpass are used under various land uses and land covers. Only BCGMS will be presented in this paper. The model will be adapted in order to be applied on agricultural land: for arable land (winter wheat, maize,…), orchards, horticulture and floriculture areas and for meadows and grassland classes. The use of this model can be justified by the precision, from both spatial and temporal, which allow us to propose a more accurate recharge assessment in function of the main crops of the study area. [less ▲]

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See detailL’accompagnement de stagiaires dans les services d’accueil en collectivité de l’enfance en Fédération Wallonie-Bruxelles
Pirard, Florence ULg; Alonso Vilches, Vincent

Conference (2015, July 02)

Notre communication vise à mieux comprendre l’activité tutorale telle qu’elle se réalise dans le cadre d’entretiens de supervision hebdomadaires dans un métier de l’interaction humaine où les ... [more ▼]

Notre communication vise à mieux comprendre l’activité tutorale telle qu’elle se réalise dans le cadre d’entretiens de supervision hebdomadaires dans un métier de l’interaction humaine où les professionnel(le)s font face à la complexité et aux aléas quotidiens. L’analyse filmée de situations de jeu et de soins prises en charge par des stagiaires ainsi que celle des entretiens entre stagiaires et tutrices qui s’en sont suivis permettent d’identifier des manifestations de l’organisation de l’activité professionnelle, à tout le moins à des préoccupations récurrentes. Ces analyses montrent l’importance d’entretiens d’explicitation non seulement pour la recherche, mais aussi comme activité formative. [less ▲]

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See detailMalentendu visuel et folie : Test de Rorschach et hyper-conscience
Englebert, Jérôme ULg

Conference (2015, July 02)

Detailed reference viewed: 33 (4 ULg)
See detailMaking-doing sensory perception: how to teach taste
Vangeebergen, Thomas ULg

Conference (2015, July 02)

Imagine a course of “olfaction and tasting”, in a notorious professional school for flavourist and perfumers in France. The aim of the teacher is to instil sensory referential sources in students, by the ... [more ▼]

Imagine a course of “olfaction and tasting”, in a notorious professional school for flavourist and perfumers in France. The aim of the teacher is to instil sensory referential sources in students, by the appropriation of a rigorous vocabulary and through practical tries of molecules and preparations. To name, to compare, to memorize, to describe and to value these substances are the tasks of the group during two years. As the general topic of the research was to understand professional skills about taste, one of the issues consisted in studying the development of these specific abilities. The focus was on the techniques deployed to install a sensory common frame, alternatively through a research of a bottom- up consensus and some imposed tags. The teacher, who has to transfer a substantial amount of sensory references to the class in narrow times, and to make them able to master those notions, has to face to a double constraint. She must transmit a core-sensorium, but at the same time has to support students’ own contributions, in mode to open the reference document to necessary enrichments. More than « actors », or « informants », the teacher and the students were also masters for me, by contributing to my sensory education. But also when they have confronted me to delicates questions and issues, sometimes against my own first researches. They were what I called though co-inquirer, proposing contradictory and resistant interpretations of the world, teaching me how to realize the study of sensory. [less ▲]

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See detailComposite hydraulic modeling to design a complex dam spillway
Erpicum, Sébastien ULg; Dewals, Benjamin ULg; Archambeau, Pierre ULg et al

Conference (2015, July 01)

The paper presents the application of a composite hydraulic modeling approach to the rehabilitation studies of a complex dam spillway. First, a physical scale model of the existing works has been built ... [more ▼]

The paper presents the application of a composite hydraulic modeling approach to the rehabilitation studies of a complex dam spillway. First, a physical scale model of the existing works has been built and operated. It enabled to define very accurately the actual discharge capacity and to validate a numerical model of the system. Second, the numerical model has been used to rapidly test several rehabilitation solutions. Finally, the final design has been validated and optimized using the physical model. The paper shows how composite hydraulic modeling enables to combine the inherent advantages of physical and numerical modeling approaches, which are complementary, while being beneficial to the delay as well as the quality of the analysis. [less ▲]

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See detailGaz à effet de serre indirects et qualité de l'air aux latitudes moyennes de l'hémisphère nord : tendances à long terme et variabilité déduites de télémesures effectuées au Jungfraujoch (Alpes suisses, 3580 m)
Franco, Bruno ULg; Bader, Whitney ULg; Lejeune, Bernard ULg et al

Conference (2015, July 01)

Indirect greenhouse gases and air quality at Northern Hemisphere mid-latitudes: long-term trends and variability derived from ground-based remote sensing at Jungfraujoch (Swiss Alps, 3580 m a.s.l.). We ... [more ▼]

Indirect greenhouse gases and air quality at Northern Hemisphere mid-latitudes: long-term trends and variability derived from ground-based remote sensing at Jungfraujoch (Swiss Alps, 3580 m a.s.l.). We present an overview of recent investigations conducted by the Solar and Atmospheric Physics Infrared Group at the University of Liège and dedicated to the long-term monitoring of atmospheric gases with an indirect greenhouse effect and affecting air quality at Northern Hemisphere mid-latitudes. Gas concentrations are derived from high-resolution solar spectra recorded at the Jungfraujoch station (Swiss Alps, 46.5° N, 8.0° E, 3580 m a.s.l.), using Fourier transform infrared spectrometers. Time series obtained from these observations, along with satellite measurements and simulations from numerical models, allow for the study of both variability and recent evolution of these species and are critical for air quality monitoring and understanding climate changes. [less ▲]

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See detailBiomarkers of prognosis and efficacy of reatment
Henrotin, Yves ULg

Conference (2015, July 01)

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See detailEffect of a stretching program on overhead athletes with a stiff and painful shoulder
Schwartz, Cédric ULg; Croisier, Jean-Louis ULg; Bruls, Olivier ULg et al

Conference (2015, July 01)

Overhead athletes are more at risk of suffering shoulder injuries or/and developing shoulder pain. Stretching programs have been shown to successfully reduce pain for this population. However no study has ... [more ▼]

Overhead athletes are more at risk of suffering shoulder injuries or/and developing shoulder pain. Stretching programs have been shown to successfully reduce pain for this population. However no study has provided a global overview of the effects of stretching. The present study evaluated the evolution of the pain, the strength of the shoulder muscles, potential instabilities or lesion of the shoulder as well as the 3D scapular kinematics of 10 overhead athletes having a painful and stiff dominant shoulder. Our results show a significant decrease of the pain and of the positive impingement syndrome tests. The kinematics of the scapula reveals a more upward rotation of the scapula after the stretching, which may reduce the risk of sub-acromial conflicts. The strength of the internal and external rotators of the shoulder is not modified by the program. [less ▲]

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See detailIntégration de tablettes numériques dans la formation des futurs enseignants: une étude de cas
Parlascino, Emmanuelle ULg; Joris, Noémie ULg

Conference (2015, July)

À travers cette recherche, les auteurs visent à mettre en évidence, chez les étudiants, les apports réels, en termes d’apprentissages et de développement professionnel, de situations d’enseignement ... [more ▼]

À travers cette recherche, les auteurs visent à mettre en évidence, chez les étudiants, les apports réels, en termes d’apprentissages et de développement professionnel, de situations d’enseignement intégrant une technologie, à savoir les tablettes numériques. Le groupe d’étude se constitue d’un enseignant en histoire en haute école pédagogique et de trois classes d’étudiants en formation pour devenir enseignants. Ce groupe fera l’objet d’une analyse approfondie au travers d’observations filmées, examinées à l’aide de grilles, et de commentaires réflexifs (de l’enseignant et des étudiants) issus d’entretiens d’autoconfrontation sur divers extraits des situations d’enseignement menées et vécues. Cette méthodologie conduira à croiser plusieurs types d’informations : (1) les objectifs de l’enseignant au moment de préparer la situation d’enseignement, (2) sa perception des apports mis en place à travers la technologie, (3) la perception de ses étudiants et (4) les observations des auteurs. Soucieux de contribuer à l’analyse réflexive sur l’intérêt d’intégrer le numérique en éducation, les auteurs veulent mettre en évidence les apports réels de l’activité, les points de passage obligés et les principales difficultés de sa mise en place. Ces résultats pourront éclairer les enseignants souhaitant se lancer dans ce genre d’activité innovante. [less ▲]

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See detailLate Holocene history of the Fuji Five Lakes (Japan)
Lamair, Laura ULg; Hubert, Aurelia ULg; Boes, Evelien et al

Conference (2015, July)

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See detailAlignments of quasar axes with large-scale structures
Hutsemekers, Damien ULg; Braibant, Lorraine ULg; Pelgrims, Vincent ULg et al

Conference (2015, July)

Based on measurements of optical linear polarization of quasars belonging to large groups at redshift ~ 1.3, we found that quasar spin axes are likely parallel to their host large-scale structures. The ... [more ▼]

Based on measurements of optical linear polarization of quasars belonging to large groups at redshift ~ 1.3, we found that quasar spin axes are likely parallel to their host large-scale structures. The observations and the statistical analysis will be reviewed, and interpretations discussed. [less ▲]

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See detailComparison of fracture prediction models on sheet metal blanking simulations
Canales Cardenas, Cristian ULg; Boman, Romain ULg; Bussetta et al

Conference (2015, July)

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See detailCarbides and grain size quantification methods in high speed steel alloys
Tchuindjang, Jérôme Tchoufack ULg; Paydas, Hakan ULg; Hashemi, Seyedeh Neda ULg et al

Conference (2015, July)

High speed steel (HSS) grades are widely used as in highly stressed applications where carbides content promote enhanced mechanical properties together with oxidation and wear resistances. Such a ... [more ▼]

High speed steel (HSS) grades are widely used as in highly stressed applications where carbides content promote enhanced mechanical properties together with oxidation and wear resistances. Such a tribological behaviour is mainly due to the presence of primary carbides. It is thus important to quantify the carbide volume fraction in HSS to correlate this result with the mechanical and tribological properties of the materials. Depending of the steel composition several types of carbides are precipitated in HSS: MC (Nb and V-rich), M2C (Mo and W-rich), Cr-rich M7C3 and some others, depending of the chemical composition. Two groups of HSS were analyzed in this study: cast HSS manufactured by centrifugal casting and cladded HSS manufactured by laser cladding. Depending on the chemical composition and the manufacturing process of the studied material, several methods have been used to quantify the carbide volume fraction and the grain size. [less ▲]

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See detailSemi-empirical correlation to model heat losses along solar parabolic trough collectors
Dickes, Rémi ULg; Lemort, Vincent ULg; Quoilin, Sylvain ULg

Conference (2015, July)

Solar thermal power plants convert sunshine energy into useful heat and electricity by means of solar collectors and a thermodynamic cycle. Among the different solar collector technologies, parabolic ... [more ▼]

Solar thermal power plants convert sunshine energy into useful heat and electricity by means of solar collectors and a thermodynamic cycle. Among the different solar collector technologies, parabolic troughs are nowadays the most widespread together with solar towers. In order to improve the computation speed required to simulate the temperature profile along solar parabolic trough collectors, a correlation estimating the effective heat losses of the receiver is an essential tool. However, the relations found in the literature lack accuracy and do not translate effectively the effects of the operating conditions in all cases. In this work, an alternative correlation is proposed and calibrated with the results of a deterministic model. Better fitting performance is demonstrated when compared to the prediction of the pre-existing correlations. The benefits and limitations of the new correlation are finally assessed. [less ▲]

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See detailDiscovery of a new spore assemblage in the Middle Devonian of Iberian Peninsula
Rial, Gonzalo; Cascales-Miñana, Borja ULg; Gozalo, Rodolfo et al

Conference (2015, July)

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See detailSharing a Car? Yuck, No! An Investigation of Customer Contamination in Access-Based Services
Hazee, Simon ULg; Delcourt, Cécile ULg; Van Vaerenbergh, Yves

Conference (2015, July)

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See detailLagrangian and Arbitrary Lagrangian Eulerian Simulations of Complex Roll Forming Processes
Crutzen, Yanick ULg; Boman, Romain ULg; Papeleux, Luc ULg et al

Conference (2015, July)

Finite element simulation of the roll forming process is regarded as an essential tool for the early design and optimization stages of a roll forming mill. However, such simulations are generally ... [more ▼]

Finite element simulation of the roll forming process is regarded as an essential tool for the early design and optimization stages of a roll forming mill. However, such simulations are generally incredibly time-consuming, limited to some simple cases and to the pre-cut forming method. In contrast to the classical Lagrangian approach, the Arbitrary Lagrangian Eulerian (ALE) formalism, which consists in decoupling the motion of the material and the mesh, can simulate the continuous process for the entire roll forming line at reasonable CPU cost by using a nearly-stationary mesh. In this work, the numerical results are compared to some experimental data on a U-channel in order to validate both Lagrangian and ALE models using our in-house code METAFOR. Furthermore, advantages of the ALE formalism are highlighted with the simulation of a tubular rocker panel on a 16-stand forming mill, which is a real industrial mill. [less ▲]

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See detailComparison of soil porosity structure under conventional and reduced tillage
Destain, Marie-France ULg; Roisin, Christian; Marmi, Abdeljalil ULg et al

Conference (2015, July)

The soil porosity structures under conventional (CT) and reduced tillage (RT) were compared on a Luvisol (Belgium) on a field experiment initiated in 2003. The total porosity n was computed from the bulk ... [more ▼]

The soil porosity structures under conventional (CT) and reduced tillage (RT) were compared on a Luvisol (Belgium) on a field experiment initiated in 2003. The total porosity n was computed from the bulk density (BD) and the microporosity structure was analysed by mercury intrusion porosimetry (MIP) in the range 0.003 to 73μm. It was presented in two forms: (i) cumulative pore volume vs equivalent pore radius r, from which four classes of porosity were defined: r < 0.2μm (microporosity); 0.2 ≤ r < 9µm (mesoporosity); 9 ≤ r < 73µm (MIP macroporosity); r ≥ 73μm (macroporosity); (ii) pore-size distribution (PSD). Besides the MIP measurements, the intrinsic behaviour of soil samples was investigated in one-dimensional compression tests. At 0.10m depth, n was 7% lower under RT than CT and corresponded mainly to a reduction of macroporosity r ≥ 73 μm which corresponds to pores in which water movement is important (P<0.05). The plough pan structure under CT was clearly different from other layers. It presented a higher precompression stress (Pc>160kPa) related to an increased proportion of small voids. When converting CT to RT, this compacted layer was still persistent after 10 years at 0.30m depth. With BD reaching 1.7Mgm-3, this layer could restrict the gas/water fluxes with negative environmental consequences. In the subsoil, n was similar under CT and RT (44%) but the porosity structure of RT was more favourable than under CT. Indeed, the macroporosity r ≥ 73 μm was 10% higher under RT than CT and the radius of the more represented pores was increased (3.2μm in RT versus 2.7μm in CT). This suggested that process of recovering the textural porosity due to long-term climatic and biological processes had begun in the subsoil of RT. [less ▲]

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See detail"On se débrouille", or how to be a good judge when the state lets you down?
Andreetta, Sophie ULg; Kolloch, Annalena

Conference (2015, July)

Over the last couple of years, Beninese magistrates have been on strike for months in a row. In 2012, it was about the Ministry of justice implying corruption issues. In 2013, it was about independence ... [more ▼]

Over the last couple of years, Beninese magistrates have been on strike for months in a row. In 2012, it was about the Ministry of justice implying corruption issues. In 2013, it was about independence and fear of political infringement. In 2014, it was about the most recent appointments. When it comes to judges from the bench, most of them complain about their substantial workload, low pay and poor working conditions. They also highlight the discrepancies between the magistrate’s social status and what their families expect from them, the standards of living that people assume that they have. In short, there seems to be a professional malaise within the Beninese bench, who feel like the state is letting them down, yet judges also insist on the importance of their work, and of doing it right. This is why, for the purpose of this paper, we will be looking at the discourses and representations of Beninese judges on their own social and professional status. What does it mean to be a judge in Benin today? Why do young lawyers choose that professional path over other legal careers? How do they ‘do their job right’ and what are the obstacles to it? Considering both age and gender, we are also trying to look at what it means to be a civil servant today, when the state is no longer the only – or the most promising – employer for legal practitioners. [less ▲]

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See detailDe nationaliteit van Belgische ‘jihadisten’ op de schopstoel : wanneer worden ‘nieuwe’ Belgen ‘echte’ Belgen?
Wautelet, Patrick ULg

Conference (2015, July)

This presentation first gives an overview of the current legal standards for deprivation of nationality based on terrorism in Belgium and France. In a second part, it focuses on the question whether it ... [more ▼]

This presentation first gives an overview of the current legal standards for deprivation of nationality based on terrorism in Belgium and France. In a second part, it focuses on the question whether it may be justified to treat different categories of nationals differently in nationality law and more specifically when dealing with deprivation of nationality. An attempt is made to analyze the French and Belgian legal framework from the angle of the prohibition of discrimination. [less ▲]

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See detailDevelopping competencies of public managers: a hybrid system analysis in a critical management education perspective
Göransson, Marie; Rondeaux, Giseline ULg

Conference (2015, July)

The role and competencies of public managers are a central topic of public administration reforms implemented these last 30 years in OECD countries. In fact, as New Public Management (NPM) doctrines ... [more ▼]

The role and competencies of public managers are a central topic of public administration reforms implemented these last 30 years in OECD countries. In fact, as New Public Management (NPM) doctrines suggest, public administration managers have to be professionalized and free to manage (Minogue, Hulme & Polidano, 1998). This professionalization and managerial freedom imply the development of new competencies borrowed from the private sector. This leads public managers to be focused on the search for performance and to consider citizens as clients. Without losing its dominance, the NPM conception has evolved with the development of new theoretical paradigms such as Neo-Weberian State (Pollitt & Bouckaert, 2004 ; Peters, 2001 ; Drechsler, 2005) and Public Value Management (Stoker, 2006 ; Moore, 1995). In these models, the manager is still driven by performance targets to provide citizen-customers professional and quality service. However, these paradigms reassert the centrality of the State and the specificity of the public sector by comparison with the private sector. In addition, the public manager must play a role in the co-construction of public value for citizens and political actor in both the short and long term (Greve, 2010). These evolutions have led to a need for hiring public managers with new profiles, and this has been reflected in new practices for recruiting and training future top civil servants. In Belgium, at some levels of government, these practices include for instance mandatory training prior to the appointment of public managers. This training aims at developing the managerial skills of the Walloon and French-speaking public services leaders. Doing so, the purpose is to guarantee the objectification of public managers’ nomination. But so far, do these trainings develop the skills highlighted by the theoretical models above? Are they in line with the ambitions of public management reforms of the last thirty years? From these first questions, we analyse on the one hand the training system genesis and the interactions between the original actors, and on the other hand, the effects of the training, in a critical perspective. Our study of the training effects is critical for two reasons. First, it questions the role of training in the transmission of the dominant principles conveyed by the NPM and its successors. Second, it considers the role of this training in the reproduction of power games between actors. In other words, we analyse how the compulsory training actually reflects a new conception of public managers and their competencies. Moreover, we consider the impact of this training on the political-administrative system and the power relations included. To this end, we articulate two distinctive approaches: one inspired by the strategic analysis (Crozier & Friedberg, 1977) to understand the interactions between actors at the genesis of the dispositive; and the other one inspired by Critical Management Education (CME), emphasizing the role of management training in the transmission of dominant ideology (Caproni & Arias, 1997). [less ▲]

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See detailModel reduction for simulating the dynamic behavior of parabolic troughs and a thermocline energy storage in a micro-solar power unit
Dickes, Rémi ULg; Desideri, Adriano ULg; Lemort, Vincent ULg et al

Conference (2015, July)

Micro-scale concentrated solar power plants are characterized by strong transients and mostly operate in off-design working conditions. Both the sizing and the control of these systems are key challenges ... [more ▼]

Micro-scale concentrated solar power plants are characterized by strong transients and mostly operate in off-design working conditions. Both the sizing and the control of these systems are key challenges whose optimization requires powerful dynamic modeling tools. In this context, a system featuring a solar field of parabolic troughs, a thermocline thermal energy storage and a 5kWe organic Rankine cycle (ORC) power unit is modeled in the Modelica language. Model reduction methods applied to the solar field and the thermal storage are investigated and analyzed to improve the computational efficiency of the problem. Each model is described and integrated in the open-source ThermoCycle library. Results of simulation under identical operating conditions are compared and the benefits and limitations of model reduction are assessed. [less ▲]

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See detailWritten Corrective Feedback: A Case Study
Noiroux, Kevin ULg

Conference (2015, July)

The present study looks at the efficacy of 3 types of written corrective feedback on errors made by French-Speaking High School students writing in English. More than 100 students, taught by 5 different ... [more ▼]

The present study looks at the efficacy of 3 types of written corrective feedback on errors made by French-Speaking High School students writing in English. More than 100 students, taught by 5 different teachers in 3 different schools, participated in the study. Each participant was randomly assigned to a different type of written corrective feedback: underlining, direct correct or explanation. Each time the students wrote a text in their EFL class, I (the researcher) corrected it, selected 10 errors and asked the students to state whether they understood the error. If they understood the error, they were asked to correct and/or explain it, depending on their treatment group. I then analyzed the corpus of more than 2000 errors: all the errors were categorized and the uptake moves (students’ corrections and explanations) verified. Finally, I checked whether there was a positive correlation between error types, types of corrective feedback, and students’ uptake. [less ▲]

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See detailHow bioméchanical analysis may help to identify abdominal injury causes in high level tennis
Tubez, François ULg; Forthomme, Bénédicte ULg; Croisier, Jean-Louis ULg et al

Conference (2015, July)

This research studies the case of a professional tennis player who has suffered from a medical tear on the left rectus abdominis muscle after a tennis serve. The goal of the study is to understand whether ... [more ▼]

This research studies the case of a professional tennis player who has suffered from a medical tear on the left rectus abdominis muscle after a tennis serve. The goal of the study is to understand whether the injury could be explained by an inappropriate technique. For this purpose, we analyzed the three dimensions kinematic and kinetic of the serve. We also performed isokinetic tests of the knees. We compared the player to five other professional players. We observed a possible deficit of energy transfer because of an important anterior pelvis tilt. Some compensations of the player during serve could be a possible higher abdominal contraction and a larger shoulder external rotation. These particularities could induce an abdominal overwork that would explain the first injury and may provoke a new injury. [less ▲]

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See detailDiplomacia pública europea y visibilidad en la prensa de sus socios estratégicos: Brasil y México
Azpíroz Manero, María Luisa ULg

Conference (2015, July)

En las relaciones internacionales, la diplomacia pública funciona como herramienta de comunicación política internacional con vistas a persuadir a públicos extranjeros sobre cuestiones de política ... [more ▼]

En las relaciones internacionales, la diplomacia pública funciona como herramienta de comunicación política internacional con vistas a persuadir a públicos extranjeros sobre cuestiones de política exterior y/o generar una imagen positiva. Entre las diversas actividades que incluye se encuentran las acciones de diplomacia mediática: acciones de información y comunicación estratégica diseñadas para transmitir el discurso político de modo efectivo y convincente. Resulta importante que dicho discurso reciba cobertura en los medios de comunicación locales, pues éstos inciden de modo importante en la configuración de la opinión pública. La Unión Europea (UE) mantiene dos Asociaciones Estratégicas en la región latinoamericana: una con Brasil (desde 2007) y otra con México (desde 2008). A través de las mismas, busca reforzar las relaciones con dos países considerados potencias políticas y económicas a nivel global. Esta investigación se centra en las relaciones bilaterales de la UE con Brasil y México y plantea: ¿qué grado y tipo de visibilidad logra la diplomacia mediática de la UE en la prensa brasileña y mexicana? Para responder, se analiza qué acciones de diplomacia mediática de la UE alusivas a la relación bilateral con Brasil y México fueron recogidas por dos diarios brasileños (O Globo y Folha de São Paulo) y dos diarios mexicanos (El Universal y La Jornada) en el periodo 2011-2013. La investigación recurre a las teorías de la agenda-setting y el framing, y cuenta con información obtenida en entrevistas realizadas a oficiales del Servicio Europeo de Acción Exterior (SEAE) en Bruselas, Brasilia y Ciudad de México. [less ▲]

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See detailQuadratization of pseudo-Boolean functions
Crama, Yves ULg; Anthony, Martin; Boros, Endre et al

Conference (2015, July)

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See detailSimulation of multibody systems and granular media using the non-smooth contact dynamic approach
Docquier, Nicolas; Dubois, Frédéric; Bruls, Olivier ULg

Conference (2015, July)

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See detailModifications acoustiques de la voix d’enseignantes au cours de la journée et de l’année scolaire
Remacle, Angélique ULg; David, Claire; Petillon, Caroline et al

Conference (2015, June 30)

Introduction Les enseignants font partie des professionnels de la voix, définis comme des travailleurs qui ne peuvent se passer de leur voix dans l’exercice de leur profession, et qui à ce titre ... [more ▼]

Introduction Les enseignants font partie des professionnels de la voix, définis comme des travailleurs qui ne peuvent se passer de leur voix dans l’exercice de leur profession, et qui à ce titre nécessitent une qualité de vocale constante (1). Cette population est particulièrement à risque et constitue le groupe de travailleurs le plus nombreux à consulter les ORL pour cause de dysphonie (2). Dans ce contexte, la recherche tente d’identifier les indices acoustiques de la fatigue vocale dans le but d’améliorer le dépistage précoce des problèmes de voix, leur traitement et leur prévention. Cette étude menée in situ a pour objectif de mettre en évidence des modifications acoustiques et prosodiques consécutives à 1) une journée de travail et 2) cinq mois de travail en milieu scolaire. Méthode La population est constituée de 22 enseignantes du primaire ayant moins de 5 années d’expérience. Pour chaque participante, cinq /a/ tenus ainsi que la lecture d’un texte ont été enregistrés 1) à deux moments de la journée de travail, soit au matin et au soir, et 2) à trois temps de l’année, soit en octobre (T0), en décembre (T1) et en février (T2). Sur les voyelles tenues, nous avons mesuré le temps maximum phonatoire (TMP), la fréquence moyenne, le jitter, le shimmer, et le rapport harmoniques/bruit (HNR). Sur les textes, nous avons mesuré la fréquence moyenne, la variation de fréquence et d’intensité (écart-type), ainsi que des paramètres relatifs au débit de parole (nombre de syllabes par seconde, nombre de pauses et durée moyenne des pauses). Pour chaque paramètre, une ANOVA en mesure répétées (2 moments * 3 temps) a été réalisée. Résultats L’effet principal du moment montre une augmentation de la fréquence moyenne mesurée sur les voyelles et sur le texte suite à une journée de travail (p<.01). Parallèlement, le TMP et le HNR augmentent (p<.01), tandis que le jitter et le shimmer diminuent en fin de journée (p<.05). Les mesures de débit montrent que les enseignantes tendent à faire moins de pauses lors de la lecture de texte en fin de journée, et que ces pauses sont de plus courte durée (p<.05). L’effet principal du temps montre une augmentation de la fréquence moyenne des voyelles et du texte au cours de l’année (p<.01), avec des valeurs plus élevées observées en décembre (T1). Les mesures relatives au débit montrent également une augmentation du nombre de syllabes par seconde (p<.01) et une tendance des locutrices à faire moins de pauses. Conclusion L’évolution des paramètres observés suggère une augmentation de la fatigue vocale et un comportement phonatoire davantage hyperfonctionnel au cours de la journée et au cours de l’année. Les résultats montrent une dégradation vocale majorée au mois de décembre, en comparaison avec les autres moments de l’année. Bibliographie 1.Titze IR, Lemke J, Montequin D. Populations in the U.S. workforce who rely on voice as a primary tool of trade: A preliminary report. Journal of Voice. 1997;11(3):254-259. 2. Remacle, A., Petitfils, C., Lejeune, L., Finck, C., & Morsomme, D. Quel est le profil professionnel des patients consultant en phoniatrie ? 70e Congrès de la Société Française de Phoniatrie, Paris, France. (13 octobre 2014). [less ▲]

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See detailLe lecteur de Barthes : jouisseur du judas ?
Lorent, Fanny ULg

Conference (2015, June 30)

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See detailERT to monitor the bioremediation of hydrocarbons with Rhodococcus erythropolis T902.1 at a pilot scale
Masy, Thibaut ULg; Caterina, David; Tromme, Olivier et al

Conference (2015, June 30)

Petroleum hydrocarbons (HC) represent the most widespread contaminants in the world and in-situ bioremediation remains a competitive treatment in terms of cost and environmental concerns. However, the ... [more ▼]

Petroleum hydrocarbons (HC) represent the most widespread contaminants in the world and in-situ bioremediation remains a competitive treatment in terms of cost and environmental concerns. However, the efficiency of such a technique (by biostimulation or bioaugmentation) strongly depends on numerous environmental characteristics (heterogeneities of the subsurface structure, soil moisture, oxygen and pollutants bioavailability, microbial niches…) and is still difficult to predict a priori. In order to lower these uncertainties, Electrical Resistivity Tomography (ERT) appears as a valuable non-invasive tool to detect soil heterogeneities and to monitor biodegradation. The main objective of this study was thus to isolate with ERT an electrical signature corresponding to an enhanced biodegrading activity, in an aged HC-contaminated clay loam soil. To achieve it, a pilot tank with metric dimensions (3.6 × 0.9 × 0.6 m) and a recirculating system (which is quite unique for this type of purpose) was built to mimic field conditions and to control the evolution of the bio-physico-chemical parameters (microbial concentration in soil and groundwater, temperature, pH, pO2, redox potential, bulk and fluid conductivities, water flow, hydrocarbon content) through time and space. Five panels of electrodes were placed at different locations in the tank to detect lithological heterogeneities and to monitor the bulk resistivity variations with time-lapse ERT. Compared to a first insufficient biostimulation phase with H2O2 and KNO3, bioaugmentation with Rhodococcus erythropolis T902.1 led to a HC depletion of almost 80% (6900 to 1600 ppm) in 3 months in the center of the contaminated clay, where pollutants were less bioavailable. Furthermore, lithological heterogeneities (clay, sand, gravels) and microbial activities (growth, degradation and biosurfactant production) were successfully discriminated by ERT images obtained during both remediation phases. In the future, this cost-effective technique should be transferred to the field in order to either (i) detect and forecast biodegradation processes before choosing an appropriate remediation technique, or (ii) monitor the efficiency of this biodegradation during an in-situ bioremediation. [less ▲]

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See detailClimate change perception and migration: questioning the immunity of the system. The case of Niger
Ozer, Pierre ULg; de Longueville, Florence

Conference (2015, June 30)

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See detailMeasuring the economic relevance of the cultural and creative sector: An application to Belgium
Lowies, Jean-Gilles ULg; Lazzaro, Elisabetta

Conference (2015, June 29)

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See detailComparative transcriptomic analysis of the distinct pancreatic cell types
Peers, Bernard ULg

Conference (2015, June 28)

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See detailCoutumiers, statuts et règlements à l’usage des chanoinesses d’Andenne et de Moustier XVIIe-XVIIIe s.,
Henneau, Marie-Elisabeth ULg

Conference (2015, June 27)

Cette étude, qui s'intègre dans le projet Lodocat (ANR Chrétientés lotharingiennes – Dorsale Catholique [IXe-XVIIIe s.]) visera essentiellement à déterminer les identités et finalités d'un chapitre noble ... [more ▼]

Cette étude, qui s'intègre dans le projet Lodocat (ANR Chrétientés lotharingiennes – Dorsale Catholique [IXe-XVIIIe s.]) visera essentiellement à déterminer les identités et finalités d'un chapitre noble à l'époque moderne et de comparer le profil d'une chanoinesse des Pays-Bas méridionaux avec celui d'autres femmes engagées dans les processus de Réforme catholique. [less ▲]

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See detailDUSP3 Phosphatase Deficiency or Inhibition Limits Platelet Activation and Arterial Thrombosis
Tautz, Lutz; Rahmouni, Souad ULg; Oury, Cécile ULg et al

Conference (2015, June 27)

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See detailAssessment of climate change effects on groundwater resource in transient conditions
Goderniaux, Pascal; Wildemeersch, Samuel; Brouyère, Serge ULg et al

Conference (2015, June 27)

A sophisticated transient weather generator (WG) in combination with an integrated surface-subsurface hydrological model (HydroGeoSphere) are used for producing a stochastic generation of large numbers of ... [more ▼]

A sophisticated transient weather generator (WG) in combination with an integrated surface-subsurface hydrological model (HydroGeoSphere) are used for producing a stochastic generation of large numbers of equiprobable climatic time series, representing transient climate change, and assess impacts on groundwater resources in a probabilistic way. The modelling approach, involving the catchment-scale fully integrated surface-subsurface model, is described in Goderniaux et al. [2009]. Biased-corrected climate change scenarios are applied as input of the hydrological model to quantify their impact on groundwater resources. In Goderniaux et al. [2011], the integrated model is used in combination with a stochastic daily weather generator (WG). This WG allowed generating a large number of equiprobable climate change scenarios representative of a full transient climate between 2010 and 2085. These scenarios enabled to account for the transient nature of the future climate change, and to assess the uncertainty related to the weather natural variability. The downscaling method considers changes in the climatic means, but also in the distribution of wet and dry days. This new methodology is applied for the unconfined chalky aquifer of the Geer catchment in Belgium. A general decrease of the mean groundwater piezometric heads, has been calculated. The approach allowed also to assess different uncertainty sources: (1) the uncertainty linked to the calibration of the hydrological model, using 'UCODE_2005'; (2) the uncertainty linked to the global and regional climatic models (GCMs and RCMs), by using a multi-model ensemble; (3) the uncertainty linked to the natural variability of the weather, by using stochastic climate change scenarios. 30 equiprobable climate change scenarios from 2010 to 2085 have been generated for each of 6 different RCMs. Results show that although the 95% confidence intervals calculated around projected groundwater levels remain large, the climate change signal becomes stronger than that of natural climate variability by 2085. The WG ability to simulate transient climate change enabled the assessment of the likely timescale and associated uncertainty of a specific impact. This methodology constitutes a real improvement in the field of groundwater projections under transient climate change conditions as it enables water managers to analyse risks and take decisions with full knowledge of projected impact and their degree of confidence. [less ▲]

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See detailLégitimité des recommAndations sur la viscosupPlementation
Henrotin, Yves ULg

Conference (2015, June 27)

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