Publications ORBi OA
Bookmark and Share    
Full Text
See detailRestrictieve focuspartikels in het Nederlands: enkel en uitsluitend en alleen (maar) problemen voor Franstaligen?
Meesters, Gert ULg

in Hiligsmann, Philippe; Beheydt, Ludo; Degand, Liesbeth (Eds.) et al Neerlandistiek in Frankrijk en in Franstalig België / Les études néerlandaises en France et en Belgique francophone (2005)

Dans cet article, il est question des différentes particules qui permettent au néerlandophone de mettre une partie de la phrase en évidence et d'exprimer en même temps une limitation. Il s'agit des ... [more ▼]

Dans cet article, il est question des différentes particules qui permettent au néerlandophone de mettre une partie de la phrase en évidence et d'exprimer en même temps une limitation. Il s'agit des particules synonymes alleen, maar, alleen maar, slechts, enkel, louter, uitsluitend. Après une brève introduction au monde des particules et l'analyse de quelques phrases rédigées par des francophones qui apprennent le néerlandais, il sera démontré qu'il n'est pas évident, même pour des néerlandophones, de savoir si une particule est utilisée correctement ou non. Des recherches dans des corpus de textes pourront aider à trouver une solution à ce problème. Au moyen de recherches dans un corpus de textes bien structuré, il sera possible de découvrir des caractéristiques sémantiques, syntaxiques ainsi que des caractéristiques de variation stylistique et régionale qui distinguent ces particules quasi synonymes. Les résultats de ces recherches seront utiles à la didactique du néerlandais langue étrangère en ce qui concerne les particules. [less ▲]

Detailed reference viewed: 40 (2 ULg)
Full Text
Peer Reviewed
See detailReconstruction of incomplete oceanographic data sets using empirical orthogonal functions: application to the Adriatic Sea surface temperature
Alvera Azcarate, Aïda ULg; Barth, Alexander ULg; Rixen, Michel et al

in Ocean Modelling (2005), 9(4), 325-346

A method for the reconstruction of missing data based on an EOF decomposition has been applied to a large data set, a test case of Sea Surface Temperature satellite images of the Adriatic Sea. The EOF ... [more ▼]

A method for the reconstruction of missing data based on an EOF decomposition has been applied to a large data set, a test case of Sea Surface Temperature satellite images of the Adriatic Sea. The EOF decomposition is realised with a Lanczos method, which allows optimising computational time for large matrices. The results show that the reconstruction method leads to accurate reconstructions as well as a low cpu time when dealing with realistic cases. The method has been tested with different amounts of missing data, artificially adding clouds ranging from 40% to 80% of data loss, and then compared to the same data set with no missing data. A comparison with in situ data has also been made. These validation studies show that results are robust, even when the amount of missing data is very high. The reconstruction of the data from the Adriatic Sea shows realistic features and a reliable temperature distribution. In addition, the method is compared to an Optimal Interpolation reconstruction. The results obtained with both methods are very similar. The main difference is the computational time, which is reduced nearly 30 times with the method presented here. Once the reconstruction has been performed, the EOF decomposition is analysed to show the method's reliability, and a cold event on the Albanian coast is studied. The reconstructed data reflect the effect of wind on the Albanian coast, that led to a cold-water episode in this zone for a 6-day period. (c) 2004 Elsevier Ltd. All rights reserved. [less ▲]

Detailed reference viewed: 161 (34 ULg)
Full Text
Peer Reviewed
See detailStructure of light and heavy pentaquarks
Stancu, Floarea ULg

in International Journal of Modern Physics A : Particles & Fields, Gravitation, Cosmology, Nuclear Physics (2005), 20(8-9), 1797-1802

Light and heavy pentaquarks are described within a constituent quark model based on a spin-flavor hyperfine interaction. In this model the lowest state acquires positive parity. The masses of the light ... [more ▼]

Light and heavy pentaquarks are described within a constituent quark model based on a spin-flavor hyperfine interaction. In this model the lowest state acquires positive parity. The masses of the light antidecuplet members are calculated dynamically using a variational method. It is shown that the octet and antidecuplet states with the same quantum numbers mix ideally due to SU (3)(F) breaking. Masses of the charmed antisextet pentaquarks are predicted within the same model. [less ▲]

Detailed reference viewed: 11 (2 ULg)
Full Text
Peer Reviewed
See detailThe discovery and properties of pentaquarks
Stancu, Floarea ULg

in International Journal of Modern Physics A : Particles & Fields, Gravitation, Cosmology, Nuclear Physics (2005), 20(2-3), 209-218

The pentaquarks are exotic baryons formed of four quarks and an antiquarks. Their existence has been discussed in the literature over the last 30 years or more, first in connection with kaon nucleon ... [more ▼]

The pentaquarks are exotic baryons formed of four quarks and an antiquarks. Their existence has been discussed in the literature over the last 30 years or more, first in connection with kaon nucleon scattering data. The subject has been revived by the end of 2002 when experimental evidence of a narrow baryon of strangeness S = +1, and mass M similar or equal to 1530 MeV has been found. This is interpreted as the lightest member of an SU(3)-flavor antidecuplet. Here we shall mainly review the predictions of pentaquark properties as e.g. mass, spin and parity, within constituent quark models. Both light and heavy pentaquarks will be presented. [less ▲]

Detailed reference viewed: 3 (1 ULg)
Full Text
See detailRecent Evolution of atmospheric OCS above the Jungfraujoch station : implications for the stratospheric aerosol layer.
Mahieu, Emmanuel ULg; Zander, Rodolphe ULg; Demoulin, Philippe ULg et al

in Proceedings of the Atmospheric Spectroscopy Applications. (2005)

Detailed reference viewed: 5 (0 ULg)
Full Text
Peer Reviewed
See detailLa force du mi-dit : Figures de style dans le roman de Lawrence Scott, Witchbroom
Pagnoulle, Christine ULg

in Palimpsestes (2005), 16

Beyond some obvious comparisons, the article traces the function of some embedded metaphors, and the kind of problem they may raise in a translation.

Detailed reference viewed: 29 (4 ULg)
Full Text
Peer Reviewed
See detailComparaison de quatre variétés de blé d’hiver : effets de différents critères physico-chimiques sur les performances zootechniques du poulet
Piron, Fabien ULg; Beckers, Yves ULg; Ounissi, Kamel et al

in Journées de la Recherche Avicole (2005)

This study investigated the influence of some physic and chemical parameters of wheat grains on the performances of broilers (Ross). Four varieties (Agami, Corvus, Folio et Meunier) were grown on a single ... [more ▼]

This study investigated the influence of some physic and chemical parameters of wheat grains on the performances of broilers (Ross). Four varieties (Agami, Corvus, Folio et Meunier) were grown on a single site in harvest year 2003. This cultivar samples are ground and included in starter (57.6 % of wheat) and growth diets (61.4 % of wheat). Broiler’s intake was not influenced (p > 0.05, n = 24) by varieties. But weights of chicken (38 days) were (p < 0.05, n = 516) higher with Folio and Meunier. Feed conversion ratios cumulated between day 3 to day 38 (FCR) were (p < 0.05, n = 24) lower with Folio and Meunier than with Corvus and Agami. Hardness was negatively correlated with FCR (r = - 0.60, p < 0.01, n = 4). The correlation between crude proteins and FCR was equal to - 0.70 (p < 0.001, n = 4). FCR was negatively correlated to Zeleny’s index (r = - 0.62, p < 0.01, n = 4), wet (r = - 0.66, p < 0.001, n = 4) and dry gluten (r = - 0.51, p < 0.05, n = 4). FCR was negatively correlated to ratio of large (> 1800 μm) particles in ground wheat (r = - 0.48, p < 0.05, n = 4) and also related to small (< 707 μm) material (r = 0.53, p < 0.01, n = 4). Surprisingly, FCR was negatively correlated with amounts of soluble Non-Starch Polysaccharides and soluble Arabinoxylans. The same pathway was observed with in vitro viscosity data. Intestinal viscosities were not related (p > 0.05, n = 24) to broiler’s performances. [less ▲]

Detailed reference viewed: 66 (15 ULg)
Full Text
See detailDefinition of quality standards applicable to the purification and the expansion of mesenchymal stem cells for their use in haematopoietic, immunosuppressive and regenerative cellular therapy
Briquet, Alexandra ULg

Master of advanced studies dissertation (2005)

Mesenchymal stem cells (MSCs) reside within the stromal compartment of bone marrow and represent a plastic cell population for which pro-haematopoietic, immunosuppressive and regenerative properties are ... [more ▼]

Mesenchymal stem cells (MSCs) reside within the stromal compartment of bone marrow and represent a plastic cell population for which pro-haematopoietic, immunosuppressive and regenerative properties are poorly characterized. A characterization of MSC preparations was carried out with each passage in MSCGM or α-MEM + 20% FBS expansion media. We obtained 3 times more cells after 5 passages in MSCGM than in α-MEM + 20% FBS. We analysed the phenotype of MSCs after each passage by flow cytometry. At all passages and in both media cells were tested negative for CD45, strongly positive for CD73 and CD90 antigens and weakly positive for CD105 and CD106 antigens. We wanted to assess the MSC ability to differentiate into adipocytes, osteoblasts and chondroblasts. At all tested passages and in both media, MSCs differentiated in these three tissues when they were placed in the adequate induction medium. We used RayBio® Human Cytokine Antibody Array to analyse the presence of several cytokines in MSC-conditioned medium. At all passages and in both media, IL-6, IL-8 and VCAM-1 were more strongly expressed than the other cytokines. We used the CFU-F assay to evaluate the frequency and purity of MSCs in culture. We observed that CFU-F number reached a maximum at passages 3 and 4 after expansion in both MSCGM and in α-MEM + 20% FBS. We also observed a greater proportion of CFU-F for the cells expanded in MSCGM compared to the cells expanded in α-MEM + 20% FBS. To assess the haematopoietic supporting ability of MSCs, long term cultures were performed. We observed more colony-forming cells when long-term cultures were done with 1st and 2nd passages MSCs than when cultures were done with 3rd, 4th and 5th passages MSCs. In NOD/SCID mice we transplanted CD34+ uncultured cells or the expansion product of CD34+ cells co-cultured for one week with MSCs. Human chimerism was present in all conditions. We observed a greater human chimerism when CD34+ cells were co-cultured with MSCs from passage 4 than in the other conditions. In all conditions simultaneous expression of CD19 or CD33 antigens on human CD45+ cells demonstrated the presence of repopulating cells with lympho-myeloid potential. Despite the fact that MSCs had the same phenotype, differentiation potential and cytokine secretion profile at each passage and in both media, MSCs did have neither the same capacity to form CFU-F nor the same capacity to support haematopoiesis in vitro and in vivo. [less ▲]

Detailed reference viewed: 70 (5 ULg)
Full Text
Peer Reviewed
See detailLes hyperpaysages - Comment percevoir, interpréter et exprimer la complexité des sociétés derrière les paysages ?
Partoune, Christine ULg; Ericx, Michel

in Bulletin de la Société Géographique de Liège (2005), 45

The design of a landscape’s virtual tour starting from an interactive panoramic image (hyperlandscape) can become a way to develop and express a glance and a speech on the landscape integrating certain ... [more ▼]

The design of a landscape’s virtual tour starting from an interactive panoramic image (hyperlandscape) can become a way to develop and express a glance and a speech on the landscape integrating certain principles of the complex thought. In complement of discovery activities and field works appropriate to this objective, the design of a virtual structure of the space on combinative mode would put into our mind some dynamic mental maps for organizing our thoughts. These mental maps could constitute metaphors which would be used as support for structuring our perceptions and thought starting from a systemic groundwork. [less ▲]

Detailed reference viewed: 67 (5 ULg)
Full Text
Peer Reviewed
See detailAtelier 2 : Hyperpaysages
Partoune, Christine ULg; Ericx, Michel

in Bulletin de la Société Géographique de Liège (2005), 45

Detailed reference viewed: 17 (2 ULg)
Full Text
Peer Reviewed
See detailSome effects of limestone fillers as a partial substitute for cement in mortar composition
Courard, Luc ULg; Degeimbre, Robert ULg; Darimont, Anne ULg et al

in Banthia, N. (Ed.) Third International Conference on construction materials: performance, innovations and structural implications (2005)

Limestone filler is a raw material that is already used in several applications like paints, bricks, bituminous mixes, … Moreover, and particularly in Belgium, classical additions like fly ashes and blast ... [more ▼]

Limestone filler is a raw material that is already used in several applications like paints, bricks, bituminous mixes, … Moreover, and particularly in Belgium, classical additions like fly ashes and blast furnace slags become rare. There is a need for new additions that could have a positive effect on the properties of the fresh and hardened cementitous composites. Substitution of limestone filler in Portland cement and blast furnace slag cement has been realized between 15 and 30% in mass. In addition to the characterization of the powder itself – specific mass, specific surface and laser granulometry – the problem of the water demand has been analysed: it seems that it remains constant with the substitution rate. Electric conductivity has also been performed in order to study the evolution of the “dormant” period. Tests on hardened mortars concerned the mechanical properties, the evolution of the porosity and the durability. The K factor indicates a higher value and the porosity seems to be better in the case of blast furnace slags cements, partially due to a very low diameter of the slags particles. Oxygen permeability doesn’t seem to be influenced by the filler while capillary absorption increases with substitution rate. Finally, chloride penetration, sulphate resistance and carbonation rate show quite interesting behaviours, leading to the conclusion that this material needs again more investigations in order to define optimum application conditions in cementitous matrixes [less ▲]

Detailed reference viewed: 73 (2 ULg)
Full Text
Peer Reviewed
See detailQualité de l'environnement versus qualité de l'offre en services dans les campagnes belges. Le bonheur est-il vraiment dans le pré ?
Schmitz, Serge ULg

in Fleuret, Sébastien (Ed.) Espaces, Qualité de vie et Bien-Etre (2005)

Detailed reference viewed: 21 (4 ULg)
Full Text
See detailIntroduction aux paysages ordinaires.
Schmitz, Serge ULg

in Territoires, urbanisation et paysages (2005)

Detailed reference viewed: 31 (10 ULg)
Full Text
See detailEquilibre musculaire agonistes / antagonistes de l’épaule : relation avec les performances de terrain
Forthomme, Bénédicte ULg; Forthomme, L.; Croisier, Jean-Louis ULg

in Actes du 2ème Colloque Médico-sportif « Entre laboratoire et terrain » (2005)

Detailed reference viewed: 166 (9 ULg)
Full Text
Peer Reviewed
See detailComment l'école s'adapte-t-elle à la diversité des élèves ?
Lafontaine, Dominique ULg

in Revue internationale d'éducation (2005), 40

Detailed reference viewed: 74 (4 ULg)
Full Text
Peer Reviewed
See detailL'Achat d'esclaves et la rédemption des captifs à Alexandrie d'après deux documents arabes d'époque mamelouke conservés aux Archives de l'État à Venise (ASVe)
Bauden, Frédéric ULg

in Eddé, Anne-Marie; Ganagé, Emma (Eds.) Regards croisés sur le Moyen Âge arabe. Mélanges à la mémoire de Louis Pouzet s.j. (1928-2002) (2005)

Detailed reference viewed: 111 (6 ULg)
Full Text
Peer Reviewed
See detailMMP-9 regulates both positively and negatively collagen gel contraction - A nonproteolytic function of MMP-9
Defawe, Olivier D; Kenagy, Richard D; Choi, Chun et al

in Cardiovascular Research (2005), 66(2), 402-409

Objective: Constrictive remodeling accounts for lumen loss in postangioplasty restenosis. Matrix metalloproteinase-9 (MMP-9) has been shown to prevent constrictive remodeling in vivo. To investigate ... [more ▼]

Objective: Constrictive remodeling accounts for lumen loss in postangioplasty restenosis. Matrix metalloproteinase-9 (MMP-9) has been shown to prevent constrictive remodeling in vivo. To investigate potential mechanisms for this observation, we investigated the role of MMP-9 in smooth muscle cell (SMC)-mediated collagen gel contraction, an in vitro model of constrictive remodeling. Methods: Fischer rat SMCs were stably transfected with a construct-expressing rat-MMP-9 under the control of a tetracycline (Tet)-off promoter. SMCs were seeded in type 1 collagen gels (2.4 mg/ml) in the presence or not of tetracycline (1 mu g/ml), and gel contraction was defined as the percentage of retraction of the collagen gel. The depletion of MMP-9 was obtained by using siRNA targeting MMP-9 mRNA or a blocking antibody. Results: Gel contraction was significantly reduced at all times when MMP-9 was overexpressed (Tet-) as compared with the control condition (Tet+). However, MMP-9 depletion of control (Tet+) SMCS (using siRNA or antibody) also inhibited gel contraction. To resolve the apparent discrepancy and determine if MMP-9 exerts a dose-dependent biphasic effect on gel contraction, conditioned medium and purified rat-MMP-9 were prepared. Gel contraction was significantly increased by addition of 0.8 mg/ml of MMP-9, while high concentrations of MMP-9 (>= 100 mg/ml) inhibited contraction. The addition of BB94 and TIMP-1 did not alter the inhibitory or stimulatory effect of MMP-9. Conclusions: Our data Suggest that MMP-9, independent of its proteolytic function, has a biphasic effect on SMC-mediated collagen gel contraction. Understanding the different roles of MMP-9 Should allow the development of better therapeutic strategies for restenotic vascular disease. (c) 2004 European Society of Cardiology. Published by Elsevier B.V. All rights reserved. [less ▲]

Detailed reference viewed: 19 (2 ULg)
Full Text
Peer Reviewed
See detailMaurice Blanchot : la genèse phénoménologique du concept de neutre
Hagelstein, Maud ULg

in Espace Maurice Blanchot - www.blanchot.fr (2005)

L’objectif de ce texte est de mettre au jour un pan de la pensée du neutre développée par Maurice Blanchot. Le neutre est l’acte littéraire – comme un feu embrasant l’écriture – qui libère le sens des ... [more ▼]

L’objectif de ce texte est de mettre au jour un pan de la pensée du neutre développée par Maurice Blanchot. Le neutre est l’acte littéraire – comme un feu embrasant l’écriture – qui libère le sens des contraintes d’expression dans lesquelles, souvent, il est pris. Mais s’il participe d’une certaine déconstruction de l’ordre dans le langage, le neutre dont Blanchot thématise le mouvement a aussi une portée métaphysique et ontologique indiscutable, au-delà de sa pertinence dans le contexte littéraire contemporain. Il faut montrer non seulement la possibilité d’une genèse phénoménologique de ce concept, mais aussi l’incidence critique de cette pensée dans le climat philosophique de son époque. Emmanuel Lévinas témoigne – dans Sur Maurice Blanchot – de l’intérêt que Blanchot eut très tôt pour les choses phénoménologiques : avec lui, des « notions très abstraites » montraient des « échappées inattendues » et de « nouveaux destins » . Si l’histoire ne nous apprend pas l’influence (en tout cas directe) des origines husserliennes de la phénoménologie sur Blanchot – on en sait plus sur ses liens à Heidegger –, il n’empêche que, rétrospectivement, Blanchot donne un tour pour le moins inattendu (transgressif en tout cas) à la réduction husserlienne. Le neutre, dont, à première vue, on parle peu en philosophie, surgit essentiellement dans le sillage de l’expérience esthétique. Partant de ce constat, l’hypothèse de travail est de confronter les deux notions suivantes : « neutralisation phénoménologique » (Husserl) d’un côté et « expérience du neutre » (Blanchot) de l’autre. S’il faut commencer par donner du crédit à ce rapprochement conceptuel, on ne peut, pour terminer, qu’accuser les mouvements de démarcation : en effet, Blanchot se défend lui-même d’un amalgame trop rapide. Si ces notions divergent, leurs liens restent ténus. On montrera que Blanchot cherche au fond à exacerber la réduction husserlienne en lui infinitisant son mouvement. Niant les réserves qu’avait émises Husserl, Blanchot fait également tomber le sujet et le langage sous le coup du neutre. Mais pourquoi cherche-t-il à penser une réduction infinie ? Pour atteindre, comme l’a très bien vu Michel Foucault, la « pensée du dehors » propre à son écriture. A travers la littérature moderne, on a souvent cru que le langage se désignait lui-même . En fait, le langage est plutôt, selon Foucault, « passage au dehors » qu’« intériorisation » auto-référente. L’écrivain tend vers le Dehors de tout monde. Il ne sait plus dire « je », il a perdu la vérité du monde, et erre dans le « dehors sans intimité et sans repos » dont parle Blanchot. En quoi Foucault peut-il soutenir que l’écrivain a perdu la vérité du monde ? Le moment de l’errance, de la « migration infinie » du oui/non primordial (le neutre), Blanchot l’appelle encore erreur . La « migration infinie de l’erreur » est précisément, soutient-il, ce dehors vers quoi nous tourne l’art . Les exemples sont nombreux qui confirment ce séjour de la littérature là où la vérité manque. En ce sens, l’écriture fragmentaire – celle de Nietzsche, de René Char ou de Blanchot lui-même – s’annonce dans L’entretien infini comme une déclinaison du neutre . Le fragmentaire mine l’exigence de totalité, résiste à la tentation de l’absolu et de la vérité, émiette le langage et « réintroduit le dis-cursus dans le discours » . La question est celle de « l’autre du langage », question toujours posée par ce langage même qui cherche une issue vers un dehors . L’œuvre parvient à nous pousser vers un dehors de ce qu’elle est essentiellement décentrement. La voix de l’écrivain, ou du narrateur, ne crée aucun centre, « ne parle pas à partir d’un centre » - c’est-à-dire d’un lieu « privilégié d’intérêt », et ne permet donc pas à l’œuvre « d’exister comme un tout achevé » . L’œuvre ne peut se refermer sur un quelconque centre de référence : exigence excentrique de l’écriture. Le neutre est, chez Blanchot, cette expérience-limite où l’écriture parvient au dehors d’elle-même, accomplissant un mouvement qui trouve peut-être son élan dans la suspension husserlienne : infinie réduction qui pousse Blanchot à nier son propre discours, c’est-à-dire à « […] le faire passer sans cesse hors de lui-même, le dessaisir à chaque instant non seulement de ce qu’il vient de dire mais du pouvoir de l’énoncer […] » . Cette analyse aura pour autre résultat de faire voir l’impertinence de Blanchot vis-à-vis de la philosophie, cette « […] amie clandestine dont nous respections – aimions –, dit-il, ce qui ne nous permettait pas d’être liés à elle, tout en pressentant qu’il n’y avait rien d’éveillé en nous, de vigilant dans le sommeil, qui ne fût dû à son amitié difficile » . [less ▲]

Detailed reference viewed: 162 (2 ULg)