References of "Unpublished conference/Abstract"
     in
Bookmark and Share    
Full Text
See detailLa chimie verte
Richel, Aurore ULg

Conference (2011, May)

Le concept de « chimie verte » se décrit comme un ensemble cohérent de 12 principes ayant pour objectif de réduire ou d’éliminer l’ulitisation et la génération de substrances dangereuses émanant de la ... [more ▼]

Le concept de « chimie verte » se décrit comme un ensemble cohérent de 12 principes ayant pour objectif de réduire ou d’éliminer l’ulitisation et la génération de substrances dangereuses émanant de la synthèse et de l’application des produits chimiques. Parmi ces 12 principes, la réduction des déchets à la source, la diminution de l’utilisation des réactifs toxiques, la conservation de l’énergie et l’exploitation de matières premières renouvelables seront présentés et discutés sur base de quelques exemples choisis. [less ▲]

Detailed reference viewed: 66 (10 ULg)
Full Text
Peer Reviewed
See detailCoconut lumber for wood decks (Cocos nucifera L.):decay resistance against Basidiomycetes fungi
Jourez, Benoît ULg; Verheyen, Cécile; Van Acker, Joris

Conference (2011, May)

Since a couple of years, manufactured products of coconut wood for outdoor uses like wood decks have been proposed on the European market. These are presented as an alternative for traditional tropical ... [more ▼]

Since a couple of years, manufactured products of coconut wood for outdoor uses like wood decks have been proposed on the European market. These are presented as an alternative for traditional tropical timbers. In the past, coconut wood was neglected and burned for sanitary reasons and lack of interest at industrial scale. Plantation coconut trees at end of production of copra constitute a renewable resource with high added value. In order to convince the markets, natural durability for outdoor use, without preservative treatment, against wood destroying fungi characteristic of northern temperate regions is a major property that has to be checked. Natural durability of coconut lumber was tested in the laboratory according to the European standard EN 15083-1 against brown (Coniophora puteana) and white (Coriolus versicolor) rot decay basidiomycetes fungi. Beech wood specimens were used as virulence controls. Mass losses were determined after 16 weeks exposure. The results showed that tested coconut wood is very resistant to the brown rot fungus Coniophora puteana and resistant to the white rot fungus Coriolus versicolor. Mass loss and density of tested samples with C. versicolor are inversely related. In addition, the density shows a large variability in the test sample, more than 500 kg / m³. These results confirm that after a selection on density criteria, the natural durability of Coconut lumber is sufficient for outdoor application in use class 3 (based on European standard EN 335 and in line with EN 460). [less ▲]

Detailed reference viewed: 111 (5 ULg)
See detailÁrbol de luna y literatura de la migración latinoamericana actual: una hibridez irónica
Berlage, Pauline ULg

Conference (2011, May)

En esta comunicación, centro mi interés en una de las novelas que estudio en el marco de mi tesis de doctorado, se trata de la novela Árbol de luna del autor venezolano Juan Carlos Méndez Guédez (2000 ... [more ▼]

En esta comunicación, centro mi interés en una de las novelas que estudio en el marco de mi tesis de doctorado, se trata de la novela Árbol de luna del autor venezolano Juan Carlos Méndez Guédez (2000, Lengua de Trapo). Primero, situo esta obra dentro del panorama de la literatura de la migración latinoamericana actual explicando lo que entiendo por “literatura de la migración”. Presento, así, los problemas de tal etiqueta así como las posibilidades que abre. En la segunda parte, ilustrando mis argumentos con la novela de Méndez Guédez, vemos cómo, desde el punto de vista de la forma, el autor mezcla los géneros y los estilos de la novela picaresca, lo “real maravilloso”, el collage modernista etc. para formar un texto híbrido, entre realidad y mito. A través de mi intervención mi propósito es el de destacar el componente multicultural de esta tercera novela de J. C. Méndez Guédez así como el papel del lector que requiere la narrativa de la inmigración. [less ▲]

Detailed reference viewed: 91 (0 ULg)
Full Text
See detailThe leisure context, a forgotten topic of sport pedagogy?
Cloes, Marc ULg

Conference (2011, May)

According to the changes of the society that occurred during the last decades of the 20th century, new sport operators grew in an answer to the modified expectations of the people. In parallel to sport ... [more ▼]

According to the changes of the society that occurred during the last decades of the 20th century, new sport operators grew in an answer to the modified expectations of the people. In parallel to sport clubs, many other structures began to invite people to move in agreement with defferent values: independent non market associations, private compagnies, non organized free sport. While analyzing themes of Sport pedagogy research, it seems that physical education is the major focus (55.6%) of the papers presented in the ARIS's conferences while studies focused on coaching represented only 18.7%. On the other hand, researches that are analyzing the teaching-learning process in leisure sport are surprisingly seldom even there are more studies aiming to better understand how physical activity can be increased in communities, for example. After a shor description of the evolution of the sport structures and the development of the current array of operators, a second section focuses on the motives of participants. The next part underlines the specific ompetences of the physical educators involved in the leisure sport sector. The final and main part proposes an overview of some studies that has been achieved in this area at the University of Liege. The conclusion provides some recommendations for researchers. [less ▲]

Detailed reference viewed: 118 (1 ULg)
Full Text
Peer Reviewed
See detailModelling hte dynamics of oxygen in the Black Sea northwestern shelf
Capet, Arthur ULg; Beckers, Jean-Marie ULg; Joassin, Pascal et al

Conference (2011, May)

Detailed reference viewed: 14 (1 ULg)
Peer Reviewed
See detailThe harbor seal and the harbor porpoise from the North Sea: review of their ecotoxicological status based on stranded and free-ranging individuals and potential threaths to the population
Das, Krishna ULg; Weijs, Liesbeth; Habran, Sarah ULg et al

Conference (2011, May)

The harbor seal (Phoca vitulina) and the harbor porpoise (Phocoena phocoena) from the North Sea have experienced major fluctuations these last decades due to habitat loss, prey fluctuation and pollution ... [more ▼]

The harbor seal (Phoca vitulina) and the harbor porpoise (Phocoena phocoena) from the North Sea have experienced major fluctuations these last decades due to habitat loss, prey fluctuation and pollution of the marine environment. Recently, development of monitoring programs and non-invasive sampling techniques, including seal catches in Germany allowed blood sampling together with measurements of blubber thickness, body mass, sex and body length. This approach is complementary to the study of stranded and by-caught individuals sampled during necropsies. Essential (Se, Zn, Cu, Fe) and non-essential elements (T-Hg, MeHg, Cd, Pb), perfluorinated organochemicals (PFCs) polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) were measured in blubber and in blood (for selected compounds) of stranded, by-caught and free-ranging individuals from Belgian and German coasts. In contrast to Cd and Pb, hepatic T-Hg can reach concentrations as high as 2.1 μg.g-1 dry weight but depended on several factors including position in the trophic chain (inferred from δ13C and δ15N values), age group and the body mass. This level has been shown to generate in vitro toxicity on harbor seal lymphocytes. Organic compound analysis (PFCs, PCBs, PBDEs) revealed widespread dispersion of contaminants in the marine environment with higher concentrations in seals compared to porpoises in agreement with the higher trophic position of the harbor seal. However, metabolization of these compounds differed between the two species, as revealed by the higher contribution of the persistent BDE-47 and lower chlorinated and non-persistent congeners (e.g. CB 52, CB95) in tissues of harbor porpoises. T-Hg, PFCs, PCBs and PBDEs were detected in calves confirming maternal transfer to offspring. These pollutants are strongly suspected to affect the immune and endocrine systems as well as vitamin A metabolism and this raises concern about exposure-related health effects, especially in younger individuals. [less ▲]

Detailed reference viewed: 147 (18 ULg)
Full Text
Peer Reviewed
See detailLe formulaire thérapeutique : Mythes et réalités
Van Hees, Thierry ULg

Conference (2011, May)

Detailed reference viewed: 17 (5 ULg)
See detailL'art sonore et son exposition: un modèle d'hétérogénéité?
Eloy, Céline ULg

Conference (2011, May)

Detailed reference viewed: 21 (2 ULg)
Peer Reviewed
See detailA Chlamydomonas mutant locked in anaerobiosis
Ghysels, Bart ULg; Matagne, René-Fernand ULg; Franck, Fabrice ULg

Conference (2011, May)

The soil dwelling microalga Chlamydomonas reinhardtii most likely encounters transient periods of anaerobiosis in its natural environment, for instance at night time or when photosynthesis is turned down ... [more ▼]

The soil dwelling microalga Chlamydomonas reinhardtii most likely encounters transient periods of anaerobiosis in its natural environment, for instance at night time or when photosynthesis is turned down in response to macronutrient limitation. Anoxic conditions trigger state I to state II transition in C.r. and the induction of a chloroplast hydrogenase., which ability to accept electrons from reduced Fd results in a transient light driven H2 evolution. We present evidence that hydrogenase induction and state transitions are required for the induction of photosynthesis in anaerobiosis and therefore critical for this alga in order to survive transient anaerobic periods in the dark. In an anaerobic metabolic context the induction of photosynthesis is severely slowed down. The highly reduced state of the NAD(P) pools and the absence of O2 as electron sink hamper light driven reoxydation of the intersystem electron carriers while CO2 assimilation by the Calvin cycle is inhibited by ATP deficiency. We have seen that gradual increase of hydrogenase activity during anaerobiosis restores a PSI acceptor pool and leads to a reduction of the induction lag of oxygenic photosynthesis. A mutant HydEF devoid of hydrogenase maturation genes typically shows 3 to 4 times longer lag phases that the WT. State transitions provide another mechanism by which photosynthetic electron transport can be unlocked in anaerobic conditions. A state II conformation is known to stimulate photo-phosphorylation, and may therefore restore Calvin cycle activity in an ATP depleted metabolic context. We observed that an anaerobically adapted stt7 mutant locked in state I is only able to induce oxygenic photosynthesis upon hydrogenase expression. We therefore constructed a double mutant Stt7HydEF impaired of state transition ability and hydrogenase activity and found it to have lost the capacity of inducing photosynthesis in anaerobic conditions. [less ▲]

Detailed reference viewed: 88 (6 ULg)
Full Text
See detailLa responsabilité parentale - questions choisies
Pfeiff, Silvia ULg

Conference (2011, May)

Detailed reference viewed: 53 (7 ULg)
Full Text
Peer Reviewed
See detailDes savoirs pour devenir compétent
Schneider-Gilot, Marguerite ULg

Conference (2011, May)

Detailed reference viewed: 14 (0 ULg)
Full Text
Peer Reviewed
See detailFidélité et Substitution : Effets de l’Etendue et de la Durée des Ruptures de Stock sur le Comportement du Consommateur
Brandt, Céline ULg; Pahud de Mortanges, Charles ULg; Van Riel, Allard ULg

Conference (2011, May)

Our research presents three types of stock outs: the traditional stock out, the prolonged stock out and the brand prolonged stock out. The research question is as follows: « Is the consumer going to stay ... [more ▼]

Our research presents three types of stock outs: the traditional stock out, the prolonged stock out and the brand prolonged stock out. The research question is as follows: « Is the consumer going to stay loyal to the store by choosing a substitute or is he going to chose another retail store? » [less ▲]

Detailed reference viewed: 38 (5 ULg)
See detailFemmes, Finance et Responsabilités : quels sont les facteurs explicatifs de la faible représentation des femmes occupant un poste financier à responsabilités?
Grodent, Françoise ULg

Conference (2011, May)

Par cette communication, nous avons essayé d’identifier les raisons de la faible proportion des femmes occupant un poste à responsabilités, soit financier dans une organisation quelconque, soit au sein ... [more ▼]

Par cette communication, nous avons essayé d’identifier les raisons de la faible proportion des femmes occupant un poste à responsabilités, soit financier dans une organisation quelconque, soit au sein même d’une institution financière, en nous basant principalement sur le genre et sur l’ensemble des préjugés qui y sont associés. [less ▲]

Detailed reference viewed: 21 (1 ULg)
See detailGC-MS for metabolomic profiling
Focant, Jean-François ULg

Conference (2011, May)

Detailed reference viewed: 14 (1 ULg)
Peer Reviewed
See detailThe link between psychosocial load at work and occupational injuries in Belgium.
Marzucco, Laurence ULg; Van Risseghem, Marleen; Braeckman, Lutgart et al

Conference (2011, May)

Detailed reference viewed: 21 (3 ULg)
See detailAircraft Cargo AutoLoad
Schyns, Michael ULg; Limbourg, Sabine ULg

Conference (2011, May)

Detailed reference viewed: 36 (5 ULg)
See detailImpact of climate and carbon sensitivities on the North Pacific ventilation in an Earth system model
Mouchet, Anne ULg; Menviel, Laurie; Goosse, Hugues et al

Conference (2011, May)

Detailed reference viewed: 9 (1 ULg)
Full Text
See detailSamenwerken met behandelend arts, arbeidgeneesheer en adviserend geneesheer
Mairiaux, Philippe ULg

Conference (2011, April 29)

Detailed reference viewed: 34 (2 ULg)
Full Text
Peer Reviewed
See detailValidation and Routine of Ligand-Binding Assays, a Bayesian Perspective
Lebrun, Pierre ULg; Boulanger, Bruno; Hubert, Philippe ULg

Conference (2011, April 29)

The way to apply Bayesian modeling is illustrated to validate a ligand-binding assay such as ELISA. Hierarchical non-linear model and the associated predictive distribution of back-calculated responses ... [more ▼]

The way to apply Bayesian modeling is illustrated to validate a ligand-binding assay such as ELISA. Hierarchical non-linear model and the associated predictive distribution of back-calculated responses allow quantifying the total uncertainty of every future measurement with the assays, through the use of precision and risk profiles. It is also shown how the obtained posterior distribution of the parameters can be used as prior for new the calibration curves during routine. [less ▲]

Detailed reference viewed: 30 (6 ULg)
Full Text
Peer Reviewed
See detailDistribution of temperature in steel and composite beams and joints under natural fire
Hanus, François; Franssen, Jean-Marc ULg

Conference (2011, April 29)

Parametric numerical analyses have been performed with SAFIR for the temperature distribution in steel and composite beams and joints subjected to natural fires. A simple model has been derived to ... [more ▼]

Parametric numerical analyses have been performed with SAFIR for the temperature distribution in steel and composite beams and joints subjected to natural fires. A simple model has been derived to calculate the temperature development in the upper flange of the steel section supporting a concrete slab. This model takes into account, not only the heat transfer with the surounding hot gases, but also the heat transfer 1) by conduction with the lower part of the section through the web and 2) with the supported concrete slab. [less ▲]

Detailed reference viewed: 45 (0 ULg)
See detailImages de la Lotharingie dans les revendications territoriales belges à l'égard de l'Allemagne après 1945
Brüll, Christoph ULg

Conference (2011, April 29)

Le « mythe médian », le rêve d’un espace d’entre-deux – le plus souvent par référence à l’imaginaire de la Lotharingie médiévale – a souvent occupé les esprits des nationalistes expansionnistes belges ... [more ▼]

Le « mythe médian », le rêve d’un espace d’entre-deux – le plus souvent par référence à l’imaginaire de la Lotharingie médiévale – a souvent occupé les esprits des nationalistes expansionnistes belges après la Première et la Seconde Guerre mondiale. A travers les exemples de Pierre Nothomb et de quelques autres protagonistes du « Comité Belge du Rhin », la communication analyse les revendications d’une annexion de territoires rhénans à la Belgique après 1945 et de la création d’un Etat rhénan. En outre, elle présente les tentatives de certains acteurs allemands de transformer le « mythe médian » hégémonique en une voie de réconciliation avec les voisins occidentaux de la jeune RFA. En dernier lieu, l’exposé montre comment les nationalistes belges ont récupéré cette conception à partir du milieu des années 1950, ce qui les amène à abandonner leur discours annexionniste au profit d’un discours de rapprochement régional européen. [less ▲]

Detailed reference viewed: 58 (4 ULg)
See detailStimuli-responsive triblock copolymer for biomedical applications
Sibret, Pierre ULg; Jérôme, Christine ULg

Conference (2011, April 29)

Detailed reference viewed: 11 (5 ULg)
See detailLa frontière: concepts et historiographie (Introduction)
Close, Florence ULg; Lanneau, Catherine ULg

Conference (2011, April 29)

Detailed reference viewed: 49 (7 ULg)
Full Text
See detailDisulfide bonds assignment and folding characterization of peptide toxins by Ion Mobility Mass Spectrometry
Echterbille, Julien ULg; Quinton, Loïc ULg; De Pauw, Edwin ULg et al

Conference (2011, April 29)

Main component of animal venoms is peptide toxins, which are highly structured by several disulfide bridges. Disulfide bridges fill different roles as increasing the toxins efficiency by lowering their ... [more ▼]

Main component of animal venoms is peptide toxins, which are highly structured by several disulfide bridges. Disulfide bridges fill different roles as increasing the toxins efficiency by lowering their immunogenicity or providing the adequate conformation to efficiently bind to the biological receptor. The sequencing and the determination of the cysteine pairing is still challenging and therefore an important step in structural analysis. In this work, we present a new strategy to sequence structured toxins and assign S-S bridges using ion mobility resolved MS/MS. The method relies on the analysis of partially reduced multiple-disulfide peptide. The mixture of the different forms is resolved by ion mobility, followed by MS/MS acquisition on each mobility separated species. The proof of concept has been successfully conducted on α-CnI, a toxin purified from the venom of Conus consors marine snail. The toxin’s sequence contains four cysteines linked together with two disulfide bridges. α-CnI was partially reduced by a small excess of tris(carboxyethyl)phosphine (10:1). The resulting mixture was purified before analysis by infusion nanoESI-Synapt-G2. Fragmentation was performed after the mobility cell, to obtain specific fragments of each species. Partial reduction of α-CnI results in a mixture of oxidized (the two disulfides are formed), reduced (the two disulfides have been reduced) and partially reduced forms (one of the two disulfides has been reduced). The arrival time distribution of triply charged ions reveals the presence of 4 different species, characterized by different relative cross sections in the gas-phase. Mass matching allows identifying the species: the first mobility (the most compact structure) was identified to be the oxidized folded toxin (M). The latest peak, corresponding to the larger cross-section, was identified as the fully reduced toxin (M+4Da). The second and the third mobility peaks were attributed to the two partially reduced forms in which only one disulfide bridge was reduced (M+2Da). The change in ion mobility depends on which S-S bridge is reduced. Ion mobility separated species give characteristic fragment ions upon fragmentation in the transfer cell (i.e. after ion mobility separator). Interestingly, fragment ions coming from partially reduced species, especially the C-S or S-S bond cleavages, clearly indicates that the disulfide linkage of α-CnI is (Cys1-Cys3) and (Cys2-Cys4) as expected from literature. The method is now being applied with success to more complex systems containing 3 or 4 disulfide bridges. The influence of the charge state on the mobility separation is systematically analyzed in terms of structural implications. [less ▲]

Detailed reference viewed: 97 (15 ULg)
Peer Reviewed
See detailA single synthetic molecular machine that generates force against a load
Lussis, Perrine ULg; Svaldo-lanero, Tiziana; Bertocco, Andrea et al

Conference (2011, April 29)

Biological molecular machines are able to rectify random thermal motions to generate directional force and carry out tasks on both the molecular and macroscopic length scales1. Although some artificial ... [more ▼]

Biological molecular machines are able to rectify random thermal motions to generate directional force and carry out tasks on both the molecular and macroscopic length scales1. Although some artificial nanomachines have been synthesized2-4 and used to collectively carry out mechanical tasks5-8, the direct measurement of the mechanical processes at the single molecule level has yet to be realized. We show that biased Brownian motion of the sub-molecular components in a hydrogen bonded [2]rotaxane9-a molecular ring threaded onto a molecular axle-can be harnessed to generate significant directional forces. We applied a mechanical load to the ring by atomic force microscopy (AFM) cantilever during single molecule pulling-relaxing cycle. Using fluctuation theorems, we were able to relate the measurements of the work done at the level of individual molecules to the free energy change measured previously by ensemble measurements. The results show that individual rotaxane molecules can generate directional forces of similar magnitude to biological machines, and extend the capabilities of AFM-based single molecule mechanics to the world of small molecules. 1. Schilva, M. (ed.) Molecular Motors (Wiley-VCH, Weinheim, 2003). 2. Kinbara, K. & Aida, T. Toward intelligent molecular machines : Directed motions of biological and artificial molecules and assemblies. Chem. Rev. 105, 1377-1400 (2005). 3. Kay, E. R., Liegh, D. A. & Zerbetto, F. Synthetic molecular motors and mechanical machines. Angew. Chem. Int. Ed. 46, 72-191 (2007). 4. Browne, W., Feringa, B. L. Making molecular machines work. Nature Nanotech. 1, 25-35 (2006). 5. Berna, J., Leigh, D. A., Lubomska, M., Mendoza, S. M., Pérez, E. M., Rudolf, P., Teobaldi, G. & Zerbetto, F. Macroscopic transport by synthetic molecular machines. Nature Mater. 4, 704-710 (2005). 6. Liu, Y., Flood, A. H., Bonvallet, P. A., Vignon, S. A., Northrop, B. H., Tseng, H.-R., Jeppesen, J. O., Huang, T. J., Brough, B., Baller, M., Magonov, S., Solares, S. D., Goddard, W. A., Ho, C.-M. & Stoddart, J. F. Linear artificial molecular muscles. J. Am. Chem. Soc. 127, 9745-9759 (2005) 7. Eelkema, R., Pollard, M. M., Vicario, J., Katsonis, N., Ramon, B. S., Bastiaansen, C. W. M., Broer, D. J. & Feringa, B. L. Molecular machines: Nanomotor rotates microscale objects. Nature 440, 163 (2006). 8. Muraoka, T., Kinbara, K., Aida, T. Mechanical twisting of a guest by a photoresponsive host. Nature 440, 512-515 (2006). 9. Kay, E. R. & Liegh, D. A. Hydrogen bond-assembled synthetic molecular motors and machines. Top. Curr. Chem. 262, 133-177 (2005). [less ▲]

Detailed reference viewed: 10 (1 ULg)
See detailLe Rhin des Césars. Frontière d'empire et source de pouvoir
Dignef, Anthony ULg

Conference (2011, April 29)

Les frontières de l’empire romain, et la frontière du Rhin en particulier, ont retenu l’attention de nombreux historiens et archéologues. Cette communication revient sur les débats, parfois vifs, à propos ... [more ▼]

Les frontières de l’empire romain, et la frontière du Rhin en particulier, ont retenu l’attention de nombreux historiens et archéologues. Cette communication revient sur les débats, parfois vifs, à propos du limes et montre que l’étude des fortifications militaires ne doit pas être négligée, mais s’inscrire dans une analyse plus large de la culture politique romaine. Dans un second temps, la lecture socio-économique des rapports entre les Romains et les Barbares, proposée par Charles Richard Whittaker, est revue et complétée à la lumière des travaux plus récents de Michael Erdrich, Peter S. Wells et Marjan C. Galestin. La dernière partie de l’exposé, consacrée à la question de l’ethnogenèse s’appuie sur les recherches de Brian Ferguson et de Neil Whitehead pour montrer le rôle déterminant de la frontière dans le processus de (trans)formation des « peuples barbares ». [less ▲]

Detailed reference viewed: 30 (4 ULg)
Peer Reviewed
See detailThe Nutshells of Fiction: Formal Remanence in the Works of Janet Frame
Delrez, Marc ULg

Conference (2011, April 28)

Detailed reference viewed: 24 (2 ULg)
Full Text
See detailAnalyse Morpho-constitutionnelle des lithiases & Cristallurie, en pratique
GADISSEUR, Romy ULg

Conference (2011, April 28)

Detailed reference viewed: 30 (4 ULg)
Full Text
Peer Reviewed
See detailPrésentation du projet de Spin-off IMONIC
Goffin, Dorothée ULg

Conference (2011, April 28)

Detailed reference viewed: 13 (3 ULg)
Full Text
See detailTraitement du Diabète et passage à l'insuline
RADERMECKER, Régis ULg

Conference (2011, April 28)

Detailed reference viewed: 17 (1 ULg)
Full Text
Peer Reviewed
See detailImpact of liquidity constraint on the management of animal genetic resources by pastoralist herders.
Antoine-Moussiaux, Nicolas ULg

Conference (2011, April 27)

The improvement of pastoral livelihoods in the context of a highly uncertain economic and climatic future implies a double need for conserving livestock biodiversity and reaching productivity gains. In ... [more ▼]

The improvement of pastoral livelihoods in the context of a highly uncertain economic and climatic future implies a double need for conserving livestock biodiversity and reaching productivity gains. In situ conservation through participative genetic improvement programs is a tool of choice for these sustainable development pursuits. In this regard, selection criteria chosen by pastoralist breeders can be classified in two broad categories : productivity-seeking or risk-alleviating. The latter aim was an important motive for the constitution of the present indigenous breeds while the former is often a rationale for their neglect. Understanding the balance can help finding the way to sustainable biodiversity management. As the basis of pastoral livelihood systems, livestock shoulders many roles, among which that of savings may be considered central. Credit facilities lacking in these remote areas, breeders would thus sell part of their productive capital to invest in its improvement. The present model consists in a theoretical inquiry for the possible consequence of this polyvalence of livestock, productive capital and mobilizable saving, on the choice between the two above-mentioned breeding aims under liquidity constraint. A major outcome of the proposed model is the existence of a threshold herd size effect on investment in risk-control. This effect does not bear on investment in productivity and is no longer observed if credit constraint is relaxed. This threshold is thus proposed to entail the presence of an “erosion trap” for biodiversity and further recalls the difficulty to design a breeding program for a group of breeders with very diverse endowments. As a result, appropriate credit programs should be considered as an important key to adoption of breeding schemes for in situ conservation, and thus both their efficiency and viability. [less ▲]

Detailed reference viewed: 33 (7 ULg)
Full Text
Peer Reviewed
See detailEx vivo ruminal cellulosome for by-product biomass conversion
Hissette, Mathias ULg; Destain, Jacqueline ULg; Thewis, André ULg et al

Conference (2011, April 27)

Detailed reference viewed: 54 (16 ULg)
Full Text
Peer Reviewed
See detailLes communes wallonnes et la gouvernance. Celui à qui on rend compte, est-il gouverné ou gouverne-t-il ?
Verjans, Pierre ULg; Matagne, Geoffroy ULg; Radoux, Emmanuel ULg

Conference (2011, April 21)

Les réformes du code de la démocratie locale et de la décentralisation reproduisent en Wallonie l'idéologie de la gouvernance issue de l'Union européenne après avoir été traduite par la Banque mondiale du ... [more ▼]

Les réformes du code de la démocratie locale et de la décentralisation reproduisent en Wallonie l'idéologie de la gouvernance issue de l'Union européenne après avoir été traduite par la Banque mondiale du monde de l'entreprise privée. On trouve dans les modifications de fonctionnement des collèges communaux les traces des exigence d'ouverture, participation et responsabilité d'un côté et d'efficacité et de cohérence de l'autre, appliquées à la nomination des bourgmestres et de l'application de la motion de méfiance constructive. [less ▲]

Detailed reference viewed: 57 (7 ULg)
Full Text
Peer Reviewed
See detailLes conséquences de la connaissance du génocide des Juifs sur le vivre-ensemble
Grandjean, Geoffrey ULg

Conference (2011, April 21)

La transmission de la mémoire de faits passés suscite d’épineuses questions dans nos sociétés contemporaines. À travers ces questions, c’est la thématique du vivre-ensemble qui est interrogée puisque la ... [more ▼]

La transmission de la mémoire de faits passés suscite d’épineuses questions dans nos sociétés contemporaines. À travers ces questions, c’est la thématique du vivre-ensemble qui est interrogée puisque la mémoire de ces faits est une reconstruction du passé. Les faits génocidaires n’échappent pas à la règle et la mémoire de ceux-ci est particulièrement importante dans nos sociétés européennes contemporaines. Afin d’éclairer les enjeux découlant de cette transmission sur le vivre-ensemble, nous voudrions axer notre propos sur une dimension précise, à savoir la conscientisation politique découlant de la transmission de la mémoire des faits génocidaires. Ainsi, les recherches que nous menons ont pour but d’analyser la manière dont cette transmission peut participer à l’intégration de jeunes Belges âgés de seize à dix-huit ans dans un système politique caractérisé par un régime démocratique. Autrement dit, il s’agit de savoir comment ces jeunes appréhendent, suite à la transmission de la mémoire des faits génocidaires, leur position dans un régime démocratique placé sous une autorité politique produisant des règles s’imposant à l’ensemble des membres de la société. Afin de répondre à cette question, différentes hypothèses ont été élaborées. Elles concernent les acquis cognitifs de type politique, les potentielles volontés d’engagement politique et civique, les images des autorités politiques, les attitudes politiques partisanes et l’efficacité politique de ces jeunes. Afin de confirmer ou non ces hypothèses, un dispositif de recherches précis a été mis en place. Il a consisté à réaliser des focus groups longitudinaux avec les jeunes visés. Au total, vingt-deux focus groups ont été réalisés en deux vagues successives séparées par un intervalle de temps compris entre douze et vingt mois. Différentes variables ont été prises en compte pour la constitution des groupes (population immigrée ou non, population issue d’un milieu favorisé ou non, population issue d’un milieu rural ou urbain et population issue du réseau officiel ou du réseau libre). Le protocole de recherche était rigoureusement identique afin de pouvoir réaliser les comparaisons adéquates. L’ensemble du corpus de données a fait l’objet d’une analyse qualitative avec l’appui d’un logiciel d’analyse qualitative. Les résultats présentés permettront ainsi d’éclairer les enjeux découlant de la transmission de la mémoire des faits génocidaires dans une société démocratique. [less ▲]

Detailed reference viewed: 75 (4 ULg)
Peer Reviewed
See detailLe territoire politico-religieux de la RDC face à la politisation des pasteurs de la diaspora
Demart, Sarah ULg

Conference (2011, April 21)

En novembre 2011 auront lieu les prochaines élections présidentielles en République démocratique du Congo (RDC). Pour la première fois dans l’histoire du pays, le mode de scrutin présidentiel sera à un ... [more ▼]

En novembre 2011 auront lieu les prochaines élections présidentielles en République démocratique du Congo (RDC). Pour la première fois dans l’histoire du pays, le mode de scrutin présidentiel sera à un seul tour. La raison invoquée par les autorités, l’Assemblée nationale et le Sénat qui votèrent cet article: rompre avec la tutelle internationale. Cependant, pour l’ « opposition », cette révision constitutionnelle vise surtout à renforcer le pouvoir du chef de l’État, candidat à sa propre succession. Dans le cadre de cette communication, nous voudrions examiner la plurilocalisation du débat politique congolais en lien avec la grille de lecture politico-religieuse qui quadrilla les Présidentielles de 2006. L’origine supposée rwandaise du chef de l’Etat congolais fut, en effet, non seulement le thème majeur de cette campagne mais un extraordinaire agent de fédération, idéologique, de l’« opposition ». S’il est aujourd’hui peu probable que la force de cette accusation suffise à rallier l’ « opposition », désormais contrainte de faire politiquement alliance, sa mise à jour pourrait par contre éclairer la réorganisation du champ politique à venir. Non seulement parce que ce soupçon accusateur a réitéré les logiques d’influence réciproque entre politique et religieux, du Réveil, mais parce qu’il souligne les formes de continuité entre différentes transitions politiques, en lien avec les logiques de conversion et de reconversion des acteurs politico-religieux. [less ▲]

Detailed reference viewed: 26 (0 ULg)
Full Text
Peer Reviewed
See detailThe electoral threshold in the Belgian regional elections: the best way to fight fragmentation?
Onclin, François ULg; Reuchamps, Min ULg

Conference (2011, April 21)

In many proportional representation (PR) systems, a legal electoral threshold has been implemented. Such a threshold reserves the allocation of seats to those parties which reach a minimum number of votes ... [more ▼]

In many proportional representation (PR) systems, a legal electoral threshold has been implemented. Such a threshold reserves the allocation of seats to those parties which reach a minimum number of votes or a percentage of the votes. Since 2004, a legal threshold of five per cent has been introduced for the Belgian regional elections, following the introduction two years earlier of the same mechanism for the federal elections. The main reason behind this electoral reform – in a country which has been quite stable on this regard – was to prevent the further fragmentation of the political spectrum. This paper aims at testing this claim on empirical grounds. Two regional elections – 2004 and 2009 – can be surveyed in order to measure the effects of the electoral threshold. It is particularly relevant to study the impact of the electoral threshold in the regional elections because there are several discrepancies between the Regions in terms of the size of the districts, the fragmentation of the party system and the electorates. These differences may indeed influence the potential effects of the legal threshold. Since Duverger’s seminal work, electoral rules are known to influence the party system through their impact on the electoral outcomes, on the one hand, and on the electoral behaviour of both parties and voters, on the other hand. Two effects, which have been much further developed by the subsequent literature and are now widely accepted, are at stake here: the mechanical and the psychological. While the former refers to the objective mechanism of under-representation of some – usually the smaller – parties which may potentially lead to their disappearance because of the electoral laws, the latter implies the more subjective mechanism which can play at the level of both voters and party elites. Thus, in order to measure the impact of the legal five per cent threshold on the fragmentation, this paper tests the mechanical and the psychological effects for the Belgian regional elections of 2004 and 2009. [less ▲]

Detailed reference viewed: 145 (7 ULg)
Full Text
Peer Reviewed
See detailBeing Moroccan abroad. Objects and everyday practices in women subjectivation.
Mescoli, Elsa ULg

Conference (2011, April 18)

Objects and practices used and performed daily, play a central role in the definition of the self, and migration paths, meant both in a personal and in a collective sense, determine complex dynamics which ... [more ▼]

Objects and practices used and performed daily, play a central role in the definition of the self, and migration paths, meant both in a personal and in a collective sense, determine complex dynamics which involve them directly. Starting from De Certeau's analysis of everyday life [1980], my research focuses on Moroccan women living in Milan's suburbs, and it aims at studying how they make themselves and the place where they live, after migration, through materiality, moving in peculiar ways among what new local context (with its mass production and wished standardization of habits) and origin country (where what is perceived as "traditional" constantly meets the global dimension of goods and practices) impose. The murmuring of everyday practices and the words of the objects involved talk about women who perform and use them in ways that lead a complex reflection on the definition of a proper Moroccan "style" [Gell, 1998]: if we can say that a person is made of material objects which determine an induction of its own agency, of biographical history and of collective memory, equally we might state that these objects interlace among each other and define different manners of being Moroccan, and of being it abroad. [less ▲]

Detailed reference viewed: 15 (5 ULg)
Peer Reviewed
See detailIdentities and Federal Dynamics in Multinational Societies: comparisons within and between Belgium and Canada
Reuchamps, Min ULg

Conference (2011, April 15)

Identities matter and this is especially true in multinational societies. In such societies, political identities play a chief variable in the political dynamics of the country. Identities ... [more ▼]

Identities matter and this is especially true in multinational societies. In such societies, political identities play a chief variable in the political dynamics of the country. Identities receivetherefore much attention in most studies on this topic. In this perspective, communities are often seen as monolithic blocks at war with each other, along ethnic-linguistic lines. However, there is a missing link between identities and federal dynamics: it should be explored how identities shape the federal dynamics and how the federal dynamics shape identities. In Belgium and Canada, two multinational federations, the federal dynamics is much influenced by abipolar dynamics between the two main ethno-linguistic groups, which may stir fruitful comparisons and insight for the understanding of multinational federations. In both countries, identities and federal dynamics are intrinsically related to each other. Yet, their current political situation is quite different. While Belgium is stuck in a deep institutional crisis, Canada has now entered a period of – more or less – stability; even though the potential for tensions has not disappeared. The different path may be explained by the interactions between identities and federal dynamics within and between the two main linguistic groups. To explore these interactions, four citizens panels were organised in Montréal (Quebec), Kingston (Ontario), Liège (French-speaking Belgium) and Antwerp (Dutch-speaking Belgium). Each panel gathered 20-30 citizens for a half-day group discussion and thus provides insightful qualitative data. More specifically, different “identity triangles” – the identities of citizens in terms of “me”, “us”, and “them” – come out this original research and these triangles illuminate different perceptions and preferences for the future of their country. The results show the identity triangles within Canada are more dissimilar than within Belgium. It also reveals the proximity of some profiles between the two countries. Although a quantitative research would be needed to offer a greater leverage in terms of generalisations, such a qualitative study offer a deeper look into the identity and federal politics, which illuminate the dynamics at the heart of most multinational federations. [less ▲]

Detailed reference viewed: 20 (0 ULg)
Full Text
Peer Reviewed
See detailWhat do protect the prevention policies in 20th century western coal industries ?
Geerkens, Eric ULg

Conference (2011, April 15)

Detailed reference viewed: 24 (1 ULg)
See detailThe Future of Belgium
Reuchamps, Min ULg

Conference (2011, April 14)

Issues for discussion: 1) Two peoples claiming the same real estate? A Brussels which is 90% Francophone and cradle of the Flemish cultural heritage. The ‘droit du sol’ vs ‘droit des gens’. 2) A conflict ... [more ▼]

Issues for discussion: 1) Two peoples claiming the same real estate? A Brussels which is 90% Francophone and cradle of the Flemish cultural heritage. The ‘droit du sol’ vs ‘droit des gens’. 2) A conflict between linguistic communities? or a cultural divide between Neo-liberal Anglo-Saxon culture in the North and Continental dirigisme in the South? 3) Has Romantic nationalism of the Flemish separatist movement truly been supplanted by ‘Nationalists with Calculators’? 4) The position of the monarchy and the traditional elites in the growing social and political crisis. 5) The EU as unwitting facilitator of the Continent’s cascading self-determinations: the alignment of Bart de Wever’s most populous party in Flanders with an EU identity [less ▲]

Detailed reference viewed: 24 (0 ULg)
Peer Reviewed
See detailDonner un sens aux données: Le cas de la modélisation de l'information archéologique du site de calakmul (Mexico)
Van Ruymbeke, Muriel ULg; Cervera - Xicotencatl, Ari; Billen, Roland ULg et al

Conference (2011, April 13)

Detailed reference viewed: 51 (14 ULg)
See detailStudying debris disks with near‐infrared interferometry
Absil, Olivier ULg; Augereau, J.-C.; Le Bouquin, J.-B. et al

Conference (2011, April 13)

In this talk, I will describe and illustrate two different ways in which near-infrared stellar interferometry can be used to constrain the nature and physics of debris disks, and help understand the ... [more ▼]

In this talk, I will describe and illustrate two different ways in which near-infrared stellar interferometry can be used to constrain the nature and physics of debris disks, and help understand the global architecture of planetary systems in general. In the first part of the talk, I will review the on-going efforts to detect bright exozodiacal disks with precision near-infrared interferometry. I will describe the results of the exozodi survey that we are currently carrying out at the CHARA array, and briefly discuss our first results and perspectives with the new PIONIER instrument at the VLTI (including the identification of previously unknown low-mass companions). Preliminary statistical trends on the occurrence of bright exozodi around nearby main sequence stars will be presented, and I will discuss how this information could be used to constrain the global architecture and evolution of debris disks. In the second part of the talk, I will focus on our on-going project to characterize the “spin-orbit” alignment of resolved debris disks with the rotation axis of their (rapidly rotating) host star. Our first result obtained with the VLTI/AMBER spectro-interferometer on Fomalhaut will be presented, as well as its possible consequences on the dynamics of the planetary system and on the physics of the grains composing the Fomalhaut dust ring. I will then briefly describe the status and perspectives of this project. [less ▲]

Detailed reference viewed: 15 (0 ULg)
Full Text
Peer Reviewed
See detailBreeding sites of Bluetongue virus vectors in Belgian cowshed
Zimmer, Jean-Yves ULg; Saegerman, Claude ULg; Losson, Bertrand ULg et al

Conference (2011, April 13)

Detailed reference viewed: 35 (12 ULg)
Full Text
See detailRecent Advances in Macromolecular Design via Cobalt-Mediated Radical Polymerization
Debuigne, Antoine ULg; Hurtgen, Marie ULg; Piette, Yasmine ULg et al

Conference (2011, April 13)

This communication will focuse on recent progress in the field of cobalt-mediated radical polymerization (CMRP). For example, the beneficial impact of cobalt complexes on the course of acrylate and vinyl ... [more ▼]

This communication will focuse on recent progress in the field of cobalt-mediated radical polymerization (CMRP). For example, the beneficial impact of cobalt complexes on the course of acrylate and vinyl chloride (VC) polymerizations will be discussed. The addition of conjugated unsaturated derivatives, like dienes, fullerenes and carbon nanotubes, onto (co)polymers preformed by CMRP has also been investigated. Similarities and differences between these radical addition processes will be presented as well as the potential applications of the resulting copolymers and carbon based materials for photodynamic therapy (PDT) and electromagnetic interferences (EMI) shielding. [less ▲]

Detailed reference viewed: 54 (6 ULg)
See detailSur l'équation fonctionnelle de Cauchy généralisée
Kreit, Damien ULg

Conference (2011, April 13)

Detailed reference viewed: 50 (12 ULg)
See detailCaractérisation et vieillissement accéléré de pigments de bleu de Prusse synthétisés selon les méthodes de préparation anciennes et modernes
Samain, Louise ULg; Lauricella, Melina; Silversmit, Geert et al

Conference (2011, April 11)

Detailed reference viewed: 110 (15 ULg)
Full Text
See detailImproved automatic calibration of groundwater flow models using self-potential measurements
Robert, Tanguy ULg; Therrien, René; Lemieux, Jean-Michel et al

Conference (2011, April 11)

Detailed reference viewed: 22 (3 ULg)
Full Text
Peer Reviewed
See detailL'utilisation du fer dans la construction médiévale mosane : explications et premiers repères d'une évolution
Maggi, Christophe ULg; Pagès, Gaspard ULg; Hoffsummer, Patrick ULg et al

Conference (2011, April 11)

The development of a new comparative approach establishing a link between the evaluation of the quantity of barks used in a roof frame and the volume of wood present in this same attic allows the ... [more ▼]

The development of a new comparative approach establishing a link between the evaluation of the quantity of barks used in a roof frame and the volume of wood present in this same attic allows the acquisition of essential information for the apprehension of the economical, the technical and the social contexts in which a timber frame was drawn up. By carrying out this kind of comparison in a systematic way in about thirty attics of religious buildings dispersed in the Walloon region (Belgium), the evolution of these contexts develops step by step since 12th until 18thcentury and highlights phenomena which influence the methods of constructions of the carpenters, like the appearance of the saw or the rarefaction of the forest resources. The confrontation of this result with the evolution of the volume of iron considered in the attics reveals the catch of importance of this material in function of the time and of the architectural principles. Iron appears in the roof frames of our areas in the same time that the advent of the Gothic architecture in link with the increase of the roof’s dimensions. Its employment generalizes then knows a real expansion at the 17th century because of the rarefaction of the forest resources but also because the preindustrial techniques allow it. [less ▲]

Detailed reference viewed: 128 (12 ULg)
Full Text
Peer Reviewed
See detailEvaluation of the present and future general circulation over western Europe simulated by the IPCC AR5/CMIP5 GCMs with the help of a circulation type classification
Belleflamme, Alexandre ULg; Fettweis, Xavier ULg; Erpicum, Michel ULg

Conference (2011, April 08)

Downscaling methods forced by General Circulation Model (GCM) simulations are not able to correct the biases in the general circulation simulated by the GCMs. Moreover, since the GCMs have a coarse ... [more ▼]

Downscaling methods forced by General Circulation Model (GCM) simulations are not able to correct the biases in the general circulation simulated by the GCMs. Moreover, since the GCMs have a coarse spatial resolution, they have difficulties to simulate reliably ground variables like temperature and precipitation which are affected by topography, land use and local features. So, we can attempt that they simulate better the large-scale atmospheric circulation. That is why it is of special interest to evaluate the GCM simulations of atmospheric circulation for current climate by comparing them with the NCEP-NCAR 1 and the ECMWF reanalysis data over 1961-1990. This analysis is done over western Europe for summer (JJA) and winter (DJF) for the GCMs (available on http://cmippcmdi.llnl.gov/cmip5/) proposed by the IPCC for its upcoming report (AR5). The method used is an automated circulation type classification based on the daily geopotential height at 500 hPa. It is a leader-algorithm correlation based method taking part of the COST733CAT classification catalogue. Unlike the usually used methods based on the monthly mean circulation, this approach allows a precise analysis of each circulation type. So, it gives much more information on the ability of the GCMs to simulate the different circulation types and consequently the climatic variability of a region. In order to allow a direct comparison between the GCM simulations and the reanalysis data, the classification is done first only for the reanalysis dataset over 1961-1990. Then, the main types individualised here are imposed for the classification of the GCM outputs. Since the circulation types are the same, the comparison between the datasets can be made on the basis of the differences of the frequency distribution throughout the classes. Moreover, the mean intraclass repartition of the circulation situations may differ from one dataset to another. So, the study of this mean and its standard deviation gives an idea of the differences between the reanalysis and the GCMs within each class. Firstly, this approach is applied to current climate (1961-1990) for evaluating the ability of the GCMs driven by the historical experiment to simulate the climate of the last decades over western Europe. In fact, if one GCM is not able to reproduce reliably the main characteristics of the current climate, its future projections may be questionable. Then, the best matching GCMs are retained and the same approach is applied to the future simulations driven by RCP concentrations or emissions (2011-2040, 2041-2070 and 2071-2100). So, the evolution of the frequency of the circulation types and maybe the appearance of new types can be analysed under climate change conditions. Moreover, it is interesting to compare the uncertainty of the current climate simulations to the projected changes for future climate. If the uncertainty is of the same order or higher than the projected changes, the reliability of the simulations for future climate may be very questionable. [less ▲]

Detailed reference viewed: 156 (12 ULg)
Full Text
See detailEvaluation of sinks and sources of CO2 in the global coastal ocean using a spatially-explicit typology of estuaries and continental shelves
Laruelle, G. G.; Dürr, H. H.; Slomp, C. P. et al

Conference (2011, April 08)

Detailed reference viewed: 8 (1 ULg)
Full Text
Peer Reviewed
See detailCLUPI: the High-Performance Close-up Camera System on board the 2018 ExoMars Rover
Josset, J. L.; Westall, F.; Hofmann, B. A. et al

Conference (2011, April 08)

Detailed reference viewed: 28 (2 ULg)
See detailMusique, Communication, Mediation. Aspects communicationnels de la pratique musicale : retour réflexif
Lambeau, Céline ULg

Conference (2011, April 08)

Musique, Communication, Médiation La présentation questionne la possibilité de fonder conceptuellement le syntagme « communication musicale », et propose d’étudier la dimension communicationnelle de la ... [more ▼]

Musique, Communication, Médiation La présentation questionne la possibilité de fonder conceptuellement le syntagme « communication musicale », et propose d’étudier la dimension communicationnelle de la pratique musicale collective, en recourant à la notion de « médiation » en tant qu’elle constitue un modèle nouveau permettant d’appréhender les phénomènes de communication impliquant un « tiers » (ici le matériau musical). Ainsi que l’a décrit Jean Davallon : « La notion de médiation apparaît chaque fois qu’il y a besoin de décrire une action impliquant une transformation de la situation et du dispositif communicationnel, et non une simple interaction entre éléments, et encore moins une circulation d’un élément d’un pôle à un autre. (…) Avec ce recours, l’origine de l’action se déplace de l’actant destinateur ou des interactants vers un actant tiers : il y a communication par l’opération du tiers » (Davallon-MEI, 2003, 43). La communication revient en particulier sur la façon dont « la musique », objet du monde appréhendé de manière holistique au début de ma recherche doctorale, a été progressivement saisie dans les différentes « natures » que lui attribue le champ scientifique (notion, pratique sociale, …) , et comment cette redéfinition a permis d'appréhender la « musique » comme un ensemble de pratiques et de représentations, constituant un terrain pour une étude portant sur les dispositifs de médiation, entendu au sens de (Servais 2010) comme "un bon outil pour penser l'impensé des pratiques de communication"(. [less ▲]

Detailed reference viewed: 52 (6 ULg)
See detailLe confort du piéton dans l'espace public
Reiter, Sigrid ULg

Conference (2011, April 08)

Detailed reference viewed: 40 (10 ULg)
See detailParticipation à une table ronde
Henneau, Marie-Elisabeth ULg

Conference (2011, April 07)

Detailed reference viewed: 14 (0 ULg)
See detailCombating Child Labour in Burkina Faso: Are the public policies dealing with the impossible?
Wouango, Joséphine ULg

Conference (2011, April 07)

These last years, the objective of abolishing child labour in Burkina Faso (a West African country) has tried to create a national unanimity regarding the commitment of collective actors (decision-makers ... [more ▼]

These last years, the objective of abolishing child labour in Burkina Faso (a West African country) has tried to create a national unanimity regarding the commitment of collective actors (decision-makers, civil society, employers, labor unions and media). It started by integrating the National Program of child welfare and the schedule of the Ministry of Employment, Ministry of Social Action, and the Ministry of Education. Burkina Faso joined the International Programme on the Elimination of Child Labour (IPEC) in 1999, created a department of fight against child labour in 2006 and raised the minimum age for admission to employment from 14 to 16 years. This paper supports a critical view of global actions to fight child labour and discusses the complexities of this issue in Burkina Faso. Using an analysis of the State’s National Plan of Action on the elimination of child Labour and two local cases studies on projects that are aimed at removing children from their work, it shows how the local context of working children and their parents are ignored in order to comply with international policy agenda and to cater to donor demands. [less ▲]

Detailed reference viewed: 38 (6 ULg)
Peer Reviewed
See detailEast Asian Social Enterprises in a Worldwide Perspective
Defourny, Jacques ULg

Conference (2011, April 07)

Detailed reference viewed: 37 (6 ULg)
Peer Reviewed
See detailL'entrepreneuriat social et l'économie sociale
Defourny, Jacques ULg

Conference (2011, April 06)

Detailed reference viewed: 88 (9 ULg)
Full Text
See detailLe DouglasModel et nos futurs projets CAPSIS
Ligot, Gauthier ULg; Perin, Jérôme ULg; de Pierpont, Astrid ULg

Conference (2011, April 06)

Detailed reference viewed: 30 (11 ULg)
See detailEmotion, corps et conscience magique chez Sartre
Cormann, Grégory ULg

Conference (2011, April 06)

Detailed reference viewed: 22 (1 ULg)
Full Text
See detailOndes de choc et pathologies abarticulaires
Kaux, Jean-François ULg

Conference (2011, April 06)

Detailed reference viewed: 65 (5 ULg)
Full Text
Peer Reviewed
See detailExplanation of the extreme low surface mass balance over the Greenland ice sheet in 2010 with the help of a regional climate model and a circulation type classification.
Fettweis, Xavier ULg; van den Broeke, Michiel; van de Berg, Willem Jan et al

Conference (2011, April 06)

The regional climate models MAR and RCMO show that the surface mass balance (SMB) rate of the whole Greenland ice sheet (GrIS) is the lowest in 2010 since 50 years. This record is a combination of an ... [more ▼]

The regional climate models MAR and RCMO show that the surface mass balance (SMB) rate of the whole Greenland ice sheet (GrIS) is the lowest in 2010 since 50 years. This record is a combination of an abnormal dry year and an exceptional melt in summer confirmed by ground measurements and satellite-derived observations. An automated circulation type classification (CTC) is used for detecting anomalies in the daily atmospheric circulation at 500hPa over the Greenland ice sheet during 2010. The CTC reveals that the low snow accumulation is due to the general circulation (negative NAO index) while the record melt in summer is rather a consequence of the well known surface albedo-temperature feedback induced by - a warmer and thinner than normal snowpack above the bare ice at the end of the spring. - an earlier beginning of the melt season. - a drier summer. - an exceptional persistence of atmospheric circulations inducing warm and dry conditions over the GrIS. All these anomalies induced in summer 2010 an exceptional time exposure of bare ice areas (with a lower albedo than snow) over the GrIS which impacts the surface melt. Sensitivity experiments carried out by the MAR model allow to estimate the importance of each anomaly in the record simulated melt of summer 2010. [less ▲]

Detailed reference viewed: 87 (16 ULg)
Full Text
See detailPegase, a model dedicated to Surface WAter Quality Assessment that helps stakeholders implementing the WFD
Deliège, Jean-François ULg; Grard, Aline ULg; Everbecq, Etienne ULg et al

Conference (2011, April 06)

Pegase, a model dedicated to surface water quality assessment that helps stakeholders implementing the WFD. That presentation showed 2 different applications directly made by the stakeholders in charge of ... [more ▼]

Pegase, a model dedicated to surface water quality assessment that helps stakeholders implementing the WFD. That presentation showed 2 different applications directly made by the stakeholders in charge of the water management at the basin scale. The end-users analysed results of the Pegase model in the scope of implementation of the WFD. Differents scenarios were build in order to simulate the way to reach the good status for water bodies. Associated costs were estimated and relevant decisions were oriented using the results of the numerical Pegase tool. [less ▲]

Detailed reference viewed: 123 (32 ULg)
Full Text
Peer Reviewed
See detailAssimilation of the 1979-2009 microwave satellite data into the regional climate MAR model for studying the Greenland ice sheet melt extent
Fettweis, Xavier ULg; Tedesco, Marco; van den Broeke, Michiel

Conference (2011, April 05)

The 1979-2009 melt extent derived from the amount of produced meltwater by day simulated by the regional climate model MAR and derived from the spaceborne microwave 19GHz horizontal polarizated (T19H ... [more ▼]

The 1979-2009 melt extent derived from the amount of produced meltwater by day simulated by the regional climate model MAR and derived from the spaceborne microwave 19GHz horizontal polarizated (T19H) brightness temperature compares well over the Greenland ice sheet (GrIS). However, some disagreements still occur in some pixels for any days. Therefore, we run the MAR model in an assimilation mode, constrained by the daily SMMR-SSM/I derived melt extent over 1979-2009. As assimilation, we change the MAR near-surface snowpack temperature for the pixels where MAR and satellite disagree. This correction allows to conserve the water equivalent of the snowpack mass in MAR while having a full agreement between model and satellite derived melt extent. The assimilation helps to improve the meltwater production simulation as well as the matching with other satellite data sets (MODIS, GRACE, ...), with the objective to reduce the uncertainties of the current SMB model-based estimates over the GrIS. [less ▲]

Detailed reference viewed: 53 (4 ULg)
Peer Reviewed
See detail"L'archive comme espace de re-création"
Belloi, Livio ULg

Conference (2011, April 05)

Cette communication se propose d'aborder l'archive comme un espace de re-création pour divers artistes contemporains. Elle se concentre sur les œuvres récentes du cinéaste autrichien Gustav Deutsch ... [more ▼]

Cette communication se propose d'aborder l'archive comme un espace de re-création pour divers artistes contemporains. Elle se concentre sur les œuvres récentes du cinéaste autrichien Gustav Deutsch, nommément "Welt Spiegel Kino" (2005) et "Film ist. a girl & a gun" (2009), qui réaniment littéralement le patrimoine cinématographique, lui conférant une urgence nouvelle. [less ▲]

Detailed reference viewed: 49 (6 ULg)
See detailModelling the Middle Miocene fluctuations in ocean biological productivity, ocean carbon isotopic composition and atmospheric CO2 level
Jacquemin, Ingrid ULg; François, Louis ULg; Diester-Haass, Liselotte et al

Conference (2011, April 05)

The Middle Miocene (17.5-13.5 Ma) is characterized by high frequency fluctuations in the seawater delta13C record with six distinct delta13C maxima linked to Earth orbital cycles (mainly the 400 kyr ... [more ▼]

The Middle Miocene (17.5-13.5 Ma) is characterized by high frequency fluctuations in the seawater delta13C record with six distinct delta13C maxima linked to Earth orbital cycles (mainly the 400 kyr eccentricity cycle). These fluctuations are negatively correlated with the delta18O variations and, on the other hand, marine data show that the ocean productivity tends to be higher during warmer periods. However, on the long term, these three indicators show a different relationship: the productivity does not show any major trend, while a positive excursion of the delta13C is observed (the so-called Monterey event) and is accompanied by a warming, i.e., a decrease in the delta18O. The question of the long-term trend has already been addressed in a previous study (Diester-Haass et al., Paleoceanography, 24, PA1209, 2008), where the positive excursion in delta13C was explained by the storage in sediments of organic carbon from continental origin. In the current study we hypothesize that the short-term (400 kyr cycle) fluctuations of the marine delta13C are mainly linked to sea level and marine productivity changes and not to changes in the terrestrial environment, explaining the different relationship between the isotopic indicators for this shorter as compared to the longer timescale. We test this hypothesis by using a global geochemical box model representing the carbon, alkalinity, phosphorus and oxygen cycles and coupled to an energy balance climate model. The model is forced with sea level fluctuations associated with the observed variations of ocean delta18O. We first evaluate the changes in continental weathering associated with these sea level fluctuations and the related climate change. The model shows that these changes in weathering cannot explain the observed amplitude of marine productivity and ocean delta13C variations over the 400 kyr eccentricity cycle. We then test the assumption that these high frequency delta13C variations were the result of a change in the turnover rate of the oceans, with higher upwelling rates and higher productivity during warmer periods. Results of model sensitivity tests indicate that this hypothesis is plausible, since it leads to approximately correct amplitudes and phases of the oceanic productivity and delta13C signals. Thus, the following picture emerges that, in the Middle Miocene, the short-term fluctuations in oceanic delta13C are driven by ocean circulation and productivity changes, while the trends at longer timescales are linked to a change in the burial rate of continental organic carbon. From this picture, the model is able to provide a geochemical history of the Middle Miocene ocean-atmosphere system consistent with the marine delta13C record. In this reconstructed history, the atmospheric CO2 level only shows small variations, with a slight decrease from the Lower Miocene (about 310 ppmv at 19 Ma) to the Middle Miocene (280 ppmv at 16 Ma) followed by a small increase thereafter (310 to 320 ppmv near 12 Ma). This history is relatively consistent with the marine 13C isotopic proxies for atmospheric CO2. [less ▲]

Detailed reference viewed: 24 (2 ULg)
Peer Reviewed
See detailDe ‘l’acte-trace’ à ‘l’acte-image’: le fait terroriste comme producteur d’emblèmes historiques
Hamers, Jérémy ULg

Conference (2011, April 05)

Un boeing de la Lufthansa immobilisé sur le tarmac de l’aéroport de Mogadiscio, la vidéo de l’otage Hanns Martin Schleyer filmé par ses ravisseurs de la Fraction Armée Rouge, quelques cadavres bâchés dans ... [more ▼]

Un boeing de la Lufthansa immobilisé sur le tarmac de l’aéroport de Mogadiscio, la vidéo de l’otage Hanns Martin Schleyer filmé par ses ravisseurs de la Fraction Armée Rouge, quelques cadavres bâchés dans des décors vides de banlieues cossues, telles sont les images d’archives qui aujourd’hui illustrent l’ensemble des années de plomb allemandes. Qu’elles fassent l’objet de reconstitutions au cinéma (La bande à Baader, Uli Edel, 2008), qu’elles servent de vecteurs d’authentification dans des docudrames (Jeux mortel, Heinrich Breloer, 1997), ou qu’elles subissent moult recyclages dans la sphère de l’art contemporain (Meinhof, Johannes Kahrs, 2001 ; Die Toten, Hans-Peter Feldmann, 1998), ces quelques représentations récurrentes semblent résumer et figurer à elles seules l’ensemble des événements qui ont fait la crise terroriste allemande dans les années septante. Conformément à un processus autonome de « métonymisation » des représentations, ces images d’archives renvoient ainsi à une multitude d’événements qui n’entretiennent parfois qu’un rapport très ténu avec les représentations proprement dites. Or, la plupart des recherches qui s’attachent à cet élargissement sémantique considèrent que ce détachement des images de leur référent originel et spécifique est avant tout tributaire du vieillissement des représentations. A rebours de cette conception de l’image d’archives comme produit d’une réduction du réel à quelques représentations, nous ambitionnons de retourner à la genèse de ces objets visuels devenus emblèmes des années de plomb pour démontrer qu’au moment même de leur conception, de leur réalisation et de leur première diffusion, ces photos et photogrammes posent déjà les bases pragmatiques nécessaires à leur accession au statut de représentations emblématiques, et ce, bien avant leur vieillissement. [less ▲]

Detailed reference viewed: 53 (3 ULg)
Peer Reviewed
See detailMerging satellite and in situ sea surface temperature data using DINEOF
Alvera Azcarate, Aïda ULg; Barth, Alexander ULg; Beckers, Jean-Marie ULg

Conference (2011, April 05)

High quality sea surface temperature data sets are needed for various applications, including numerical weather prediction, ocean forecasting and climate research. The coverage, resolution and precision ... [more ▼]

High quality sea surface temperature data sets are needed for various applications, including numerical weather prediction, ocean forecasting and climate research. The coverage, resolution and precision of individual sea surface temperature observations is not sufficient for these applications, therefore merging of complementary data sets is needed to increase the coverage and to reduce the final data set error. DINEOF (Data Interpolating Empirical Orthogonal Functions) is an EOF-based technique to reconstruct missing information -due to clouds, for example in satellite data sets. A new development of this method consists in its capability to merge different data sources into one estimate. This development is tested using AVHRR data of the western Mediterranean Sea and in situ data from various international databases (World Ocean Database (WOD), MEDAR/Medatlas, Coriolis Data Center, International Council for the Exploration of the Sea (ICES) and International Comprehensive Ocean-Atmosphere Data Set (ICOADS)). An error assessment between the satellite and in situ data is performed first, in order to determine the error statistics between these two data sources. The error is calculated by database, platform type (CTD, XBT, drifters, bottles and ships) and depth. This error assessment is used to merge the in situ and satellite data. The impact of the sensor-specific errors on the quality of the final product will be assessed, and compared to the results obtained when the same error estimate is used for all sensors. The benefit of using in situ data in addition to satellite data will be also discussed. Additional information can be found at http://modb.oce.ulg.ac.be/mediawiki/index.php/DINEOF and http://gherdiva.phys.ulg.ac.be/DINEOF/ [less ▲]

Detailed reference viewed: 61 (1 ULg)
Full Text
Peer Reviewed
See detailEvaluation of the Greenland ice sheet surface mass balance simulated by a regional climate model forced by some selected IPCC AR5/CMIP5 AOGCMs over the current climate.
Fettweis, Xavier ULg; van den Broeke, Michiel; van de Berg, Willem Jan et al

Conference (2011, April 05)

Abstract. As part of the ICE2SEA project, the regional climate model MAR was forced by the general circulation model ECHAM5 for making future projections of the Greenland Ice Sheet (GrIS) Surface Mass ... [more ▼]

Abstract. As part of the ICE2SEA project, the regional climate model MAR was forced by the general circulation model ECHAM5 for making future projections of the Greenland Ice Sheet (GrIS) Surface Mass Balance (SMB) over 1980-2099 at a resolution of 25km. For the A1B scenario, MAR projects a highly negative (-500 GT/yr) SMB rate at the end of this century and a induced mass loss corresponding to a sea level rise of ~7 cm over 2000-2100. However, the comparison with MAR forced by the ERA-40 reanalysis over 1980-1999 shows that MAR forced by the 20C3M scenario is not able to represent reliably the current SMB due to biases in the general circulation and in the free atmosphere summer temperature modeled by ECHAM5 around the GrIS. These biases induce in MAR an underestimation of the snow accumulation and an overestimation of the surface melt. Therefore, this questions the reliability of these ECHAM5-forced future projections, knowing that i) these biases could be amplified in future and that ii) the MAR outputs are used to force ice sheets models for the ICE2SEA project. That is why, by waiting the outputs from the next generation of GCMs (CMIP5), we investigate the impacts of current climate biases over the future projections and we suggest corrections of ECHAM5 forcing files for having a better agreement with the ERA-40 forced simulation. This is useful for the ice sheet model wanting to use the absolute values of MAR future projections instead of anomalies. [less ▲]

Detailed reference viewed: 92 (13 ULg)
Full Text
Peer Reviewed
See detailThe Contemporary Significance of Historical Legacies in Belgium
Reuchamps, Min ULg

Conference (2011, April 05)

Since 1993, Belgium is officially a federal state, composed of – three – communities and – three – regions, as the – new at the time – first article of the Constitution proclaims. The history of ... [more ▼]

Since 1993, Belgium is officially a federal state, composed of – three – communities and – three – regions, as the – new at the time – first article of the Constitution proclaims. The history of federalism in Belgium is therefore quite recent. Nevertheless, the story is – much – longer since it starts with the independence of Belgium from the United Kingdom of the Netherlands in 1830. The very beginning of a state and the underlying causes of its creation, as well as its place on the map, the timing of its creation and the characteristics of the elites who take the lead and define the new state’s nature are of crucial importance and these elements shape the country’s political development for centuries. Nonetheless, although the beginning of any state sets up a path dependency, there are also critical junctures along its political development which in turn influences the course of history. This is especially true for Belgium. Here, history and politics are intrinsically interrelated. Indeed, these dual dynamics – history as politics and politics as history – are at the heart of Belgium’s federalism. To explore these dynamics, this paper distinguishes three key variables of the historical-political relationship in order to apprehend the contemporary significance of historical legacies in Belgium. The first variable is the territorial principle vs. linguistic principle debate, which constitutes the backbone of the so-called Belgian community question – or in other words the foremost divisive issue of federalism in Belgium. The second variable is the political parties because they have played and play the major role in Belgian politics and therefore in the Belgian federal dynamics. The third variable is made of the people; that is, at the individual level, the inhabitants or the citizens or the voters and, at the collective level, the communities and/or the nations of Belgium. These three variables are at the heart of Belgium’s past, present and future and continuously interact with one another – i.e. they form a triangle of interactions. In order to offer a clear picture of these interactions, Belgium’s history is divided into three periods: before federalism (1830-1960), federalism (1960-2010) and after federalism (2010-onwards). This division in three variables and in three periods structures the paper. [less ▲]

Detailed reference viewed: 32 (1 ULg)
Full Text
See detailGlacial CO2 cycle as a succession of key physical and biogeochemical processes
Brovkin, Victor; Ganopolski, Andrey; Munhoven, Guy ULg et al

Conference (2011, April 05)

Ice core records of atmospheric CO2 concentration through the last 800,000 years show the carbon cycle amplifying the climate forcing from variations in Earth’s orbit. This positive climate-carbon cycle ... [more ▼]

Ice core records of atmospheric CO2 concentration through the last 800,000 years show the carbon cycle amplifying the climate forcing from variations in Earth’s orbit. This positive climate-carbon cycle feedback could weaken or even possibly reverse present-day fossil fuel CO2 uptake by the natural carbon cycle. Despite much effort over the last two decades, a mechanistic, process-based explanation of the carbon cycle feedbacks responsible for the glacial / interglacial CO2 cycles remains elusive.We will present first transient simulations of the last glacial cycle using an Earth System model of intermediate complexity to predict atmospheric CO2 , driven by orbital changes and reconstructed radiative forcing from greenhouses gases, ice, and aeolian dust. The model is able to reproduce the main features of the CO2 changes: a 50 ppmv CO2 drop during glacial inception, a minimum concentration at the last glacial maximum 80 ppmv lower than the Holocene value, and an abrupt 60 ppmv CO2 rise during the deglaciation. The model deep ocean d13 C also resembles the reconstructions from the real ocean. The main drivers of atmospheric CO2 evolve with time: changes in sea surface temperature and volume of bottom water of southern origin exert CO2 control during the glacial inception and deglaciation, while changes in carbonate chemistry and marine biology are dominant during the first and second parts of the glacial cycle, respectively. Changes in terrestrial carbon storage counteract oceanic mechanisms during glacial inception and deglaciation, unless the potential for permafrost development is included in the soil carbon model. These feedback mechanisms could also significantly impact the ultimate climate response to the anthropogenic perturbation. [less ▲]

Detailed reference viewed: 15 (1 ULg)
See detailEOF analysis of Sea Surface Temperature in the Canary Island - Madeira region
Troupin, Charles ULg; Alvera Azcarate, Aïda ULg; Barth, Alexander ULg et al

Conference (2011, April 05)

We analyzed Sea Surface Temperature (SST) images in a region covering the Canary Islands and Madeira archipelagos, with the following objectives 1. The reconstruction of incomplete SST satellite images ... [more ▼]

We analyzed Sea Surface Temperature (SST) images in a region covering the Canary Islands and Madeira archipelagos, with the following objectives 1. The reconstruction of incomplete SST satellite images during the year 2009. 2. The determination of the main spatial and temporal patters in the region. SST images for 2009 are downloaded from the Medspiration project (http://www.medspiration.org). The images consist of combined measurements from several satellite systems. The images with less than 5% of valid pixels (e.g., clouds) were removed, so that out of the 365 initial images, 347 were kept. The method used in this work for the reconstruction of missing data is Data INterpolating Empirical Orthogonal Functions (DINEOF, Alvera-Azcárate et al., 2005). The results show that the first mode is largely dominant, with 87% of the variance explained, and represents the regional seasonal cycle. The second mode accounts for 9% of the variance and depicts a separation between coastal waters and open-ocean waters. The signal of the Cape Ghir upwelling filament is also present in the second mode. The reconstruction allows one to reproduce the characteristic mesoscale features of the region: the coastal upwelling, the island wakes (Gran Canaria, Madeira, ... ), the filament and the eddies in the lee of the main islands. A near-operational version of the reconstruction has been implemented and is available at http://gher-diva.phys.ulg.ac.be/DINEOF/dineof_allCAN.html [less ▲]

Detailed reference viewed: 62 (6 ULg)
Full Text
See detailNMR Spectroscopy actinide complexes: In search of covalency effects
Desreux, Jean-François ULg; Vidick, Geoffrey ULg; Bouslimani, Nouri et al

Conference (2011, April 05)

Detailed reference viewed: 21 (5 ULg)
Full Text
Peer Reviewed
See detailLinguistic innovations and evolution of registers in the Deir el-Medineh community: Scribal networks and families during the 20th dynasty
Polis, Stéphane ULg

Conference (2011, April 05)

The aim of this lecture was to investigate the relation between scribal variation and language change in pre-Demotic Egyptian, focusing more specifically on “The best case scenario in the worst cultural ... [more ▼]

The aim of this lecture was to investigate the relation between scribal variation and language change in pre-Demotic Egyptian, focusing more specifically on “The best case scenario in the worst cultural environment”, i.e. the text community of Deir el-Medineh during the 20th Dynasty. The talk was methodologically oriented and several case-studies (related to the diaphasic and diachronic dimensions of variation) were presented in order to illustrate some principles and to suggest new ways of investigation in the description of Ancient Egyptian variation. Additionally, the possibility of a scribal network analysis of the written material found in Deir el-Medineh has been discussed. [less ▲]

Detailed reference viewed: 60 (5 ULg)
Full Text
See detailResponsible innovation and nanotechnologies
Thoreau, François ULg

Conference (2011, April 04)

Dès le départ, le développement des nanotechnologies a été fortement soutenu par les pouvoirs publics et marqué par une vision particulière du futur de nos sociétés occidentales. C'est notamment pour ... [more ▼]

Dès le départ, le développement des nanotechnologies a été fortement soutenu par les pouvoirs publics et marqué par une vision particulière du futur de nos sociétés occidentales. C'est notamment pour cette raison que les sciences humaines et sociales (SHS) ont été conviées à participer à la réflexion autour des nanotechnologies, dans le cadre plus général (et concomitant) de l'innovation responsable. Que ce soit aux États-Unis ou en Europe, cette évolution s'est traduite par des tentatives de mobiliser les savoirs produits en SHS, et des les rendre "opérationnels" directement au coeur des processus d'innovation, de recherche et développement. Cette démarche d'"intégration", selon la dénomination consacrée, entend briser les barrières disciplinaires. Nous abordons l'un de ces programmes de recherche spécifique, auquel nous avons collaboré, et en tirons les conclusions provisoires ainsi que quelques conséquences. [less ▲]

Detailed reference viewed: 56 (3 ULg)
See detailLong baseline interferometry applied to the study of colliding-wind massive binaries: current status and prospects for the near future
De Becker, Michaël ULg

Conference (2011, April 04)

Massive binaries are important laboratories to investigate science topics related to stellar astrophysics. In particular, colliding winds in some massive binaries are known to produce strong X-ray ... [more ▼]

Massive binaries are important laboratories to investigate science topics related to stellar astrophysics. In particular, colliding winds in some massive binaries are known to produce strong X-ray emission, to accelerate particles, and to act as nucleation site for dust particles. Recent advances in the development of interferometric instruments coupled to long baseline facilities such as the VLTI allow us to observe astronomical targets at the milli-arcsecond scale. In the context of the study of colliding-wind binaries, this tool is likely to provide crucial information. I will briefly discuss ongoing observation campaigns aiming at using such interferometric facilities in the purpose to study the physics of colliding-wind binaries. [less ▲]

Detailed reference viewed: 14 (0 ULg)
Full Text
See detailLa (photo)production d'hydrogène par les microorganismes
Lecler, Renaud ULg

Conference (2011, April 04)

Detailed reference viewed: 83 (15 ULg)
Full Text
Peer Reviewed
See detailMacroevolution in early eukaryotes
Javaux, Emmanuelle ULg

Conference (2011, April 04)

Detailed reference viewed: 34 (5 ULg)