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See detailCaractérisation écologique de la pollinisation des Iris Oncocycles endémiques du Liban
Monty, Arnaud ULg

Master's dissertation (2004)

Les Iris Oncocycles libanais sont des espèces montagnardes, endémiques et menacées. Dans un cadre général de mise au point d’une stratégie de conservation, le système reproducteur et le système de ... [more ▼]

Les Iris Oncocycles libanais sont des espèces montagnardes, endémiques et menacées. Dans un cadre général de mise au point d’une stratégie de conservation, le système reproducteur et le système de pollinisation de ces végétaux ont été caractérisés. L’essentiel des observations a porté sur une espèce type : Iris cedretii Dinsmore ex Chaudhary, dont deux populations distinctes ont été répertoriées. Des observations complémentaires ont été faites sur une population d’Iris sofarana subsp. kasruwana Dinsmore ex Chaudhary. Les Oncocycles libanais sont des végétaux allogames stricts, et la fleur est réceptive pendant cinq jours, au plus. Des séances d’observation et de récoltes entomologiques ont été effectuées de jour, par différentes conditions climatiques. Elles ont mis en évidence le rôle des abeilles mâles du genre Xylocopa dans la pollinisation, et le faible taux de visite global des Iris. Des séances d’échantillonnage au sein des fleurs, de jour et de nuit, ont permis de jauger l’importance du phénomène de refuge. Quantitativement, le refuge concerne surtout les abeilles mâles du genre Eucera, mais une faune diversifiée trouve abri dans les fleurs. Afin de comprendre plus précisément le phénomène, des observations matinales et des mesures de températures, notamment intra-florales, ont été menées. Des quantifications de pollen sur les insectes ont permis de valider le rôle de ceux-ci comme pollinisateurs. Les Iris Oncocycles libanais ont un système de pollinisation double. Il est basé, d’une part, sur les transfert polliniques dus au va-et-vient des réfugiés. D’autre part, des déplacements de pollen sont assurés par les Xylocopes, apparemment attirés au sein du tube floral par une tromperie sexuelle. Cette duperie fait intervenir la tache « onco », sur le labelle, qui est caractéristique de la section Oncocyclus. [less ▲]

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See detailFinite element modelling of ion convection by electrostatic forces
Deliège, Geoffrey ULg; Henrotte, François; Deprez, Wim et al

in IET Science, Measurement & Technology (2004), 151(6), 398-402

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See detailThe eggshell approach for the computation of electromagnetic forces in 2D and 3D
Henrotte, François; Deliège, Geoffrey ULg; Hameyer, Kay

in COMPEL (2004), 23(4), 996-1005

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See detailPlatelet expression of non-functional P2X1delL ion channels in mice reduces arterial thrombosis
Oury, Cécile ULg; Daenens, Kim; Feijge, Marion et al

in Haematologica (2004)

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See detailLes déficits phonologiques des enfants francophones ayant des troubles spécifiques de développement du langage
Parisse, Christophe; Maillart, Christelle ULg

in Glossa (2004), 89

This study investigated the phonological expressive disorders of Frenchspeaking children with SLI. The main goal of this paper was to confirm whether children with SLI have limitations in phonological ... [more ▼]

This study investigated the phonological expressive disorders of Frenchspeaking children with SLI. The main goal of this paper was to confirm whether children with SLI have limitations in phonological ability even when they are compared with normally-developing children matched by MLU and phonemic inventory size. This was demonstrated by Bortoloni and Leonard (2000), Orsolini et coll. (2001), and Aguilar-Mediavilla et coll. (2002), which obtained the most detailed results in this direction, but it was never tested in French language. The second goal of the paper is to find out whether the characteristics of the French language are reflected in the nature of the children’s phonological disorder. In order to test this, the spontaneous language of 16 children with SLI and of 16 control children matched on MLU and phonemic inventory size (NLD group) was analysed using different measures bearing on utterances, words, syllables, or phonemes. In both SLI and NLD groups, the children were distributed in two different subgroups, on the basis of their MLU and phonemic inventory size. The results supported a specific limitation in the phonological abilities of French children with SLI, as was already demonstrated for English, Hebrew, Italian, and Spanish-Catalan. However, two unexpected results were also obtained. Firstly, a significant difference between children with SLI and control children could only be found for older children (MLU above 3), not for younger children with MLU below 3. This was true for all measures. This finding stresses out the importance of having a development perspective and has to be confirmed with longitudinal design. Secondly, deficits were much more important at the phoneme level than at the syllable level. This can be explained by the fact that the French language has a very homogenous pronunciation of syllables, which makes them easier to segment. [less ▲]

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See detailLe coût cognitif des processus orthographiques
Schelstraete, Marie-Anne; Maillart, Christelle ULg

in Glossa (2004), 89

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See detailLe texte dans tous ses états. Philosophie d’encodage du projet Khartês
Mazziotta, Nicolas ULg

in Dister, Anne; Purnelle, Gérald; Fairon, Cédrick (Eds.) Le poids des mots. Actes des 7es Journées internationales d’Analyse statistique des Données Textuelles (2004)

When editing Medieval sources, one always encounters the same dilemma : how to make the text readable nowadays without spoiling its testimony ? « Cleaning » the text from all that makes it difficult to ... [more ▼]

When editing Medieval sources, one always encounters the same dilemma : how to make the text readable nowadays without spoiling its testimony ? « Cleaning » the text from all that makes it difficult to read for someone erases marks that would look valuable from another point of view. Hence, there is an unavoidable gap between the source and the edition. The Khartês project (which intends to edit and study original Old French charters written in Liège before 1300) has encountered this problem. Traditional « solutions » were inadequate and computers opened an interresting path. However, Khartês had to think about creating an encoding scheme that would suit its aim and remain easy to use. This is the way KML (the Khartês Markup Language, an XML-conformant language) was born, together with a small set of handy encoding rules. A wide range of applications are made possible. For instance, thanks to the way the corpus has been created, it has been possible to search a particular document for marked letters (which look like our uppercase letters) and to study them. [less ▲]

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See detailGenome scan for familial abdominal aortic aneurysm using sex and family history as covariates suggests genetic heterogeneity and identifies linkage to chromosome 19q13.
Shibamura, Hidenori; Olson, Jane M; van Vlijmen-Van Keulen, Clarissa et al

in Circulation (2004), 109(17), 2103-8

BACKGROUND: Abdominal aortic aneurysm (AAA) is a relatively common disease, with 1% to 2% of the population harboring aneurysms. Genetic risk factors are likely to contribute to the development of AAAs ... [more ▼]

BACKGROUND: Abdominal aortic aneurysm (AAA) is a relatively common disease, with 1% to 2% of the population harboring aneurysms. Genetic risk factors are likely to contribute to the development of AAAs, although no such risk factors have been identified. METHODS AND RESULTS: We performed a whole-genome scan of AAA using affected-relative-pair (ARP) linkage analysis that includes covariates to allow for genetic heterogeneity. We found strong evidence of linkage (logarithm of odds [LOD] score=4.64) to a region near marker D19S433 at 51.88 centimorgans (cM) on chromosome 19 with 36 families (75 ARPs) when including sex and the number of affected first-degree relatives of the proband (N(aff)) as covariates. We then genotyped 83 additional families for the same markers and typed additional markers for all families and obtained a LOD score of 4.75 (P=0.00014) with sex, N(aff), and their interaction as covariates near marker D19S416 (58.69 cM). We also identified a region on chromosome 4 with a LOD score of 3.73 (P=0.0012) near marker D4S1644 using the same covariate model as for chromosome 19. CONCLUSIONS: Our results provide evidence for genetic heterogeneity and the presence of susceptibility loci for AAA on chromosomes 19q13 and 4q31. [less ▲]

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See detailDeep drawing simulations with different polycrystalline models
Duchene, Laurent ULg; de Montleau, P.; Bouvier, S. et al

in Gosh, Somnath; Castro, Jose M.; Lee, June K. (Eds.) Materials Processing and Design: Modeling, Simulation and Applications (NUMIFORM 2004) (2004)

The goal of this research is to study the anisotropic material behavior during forming processes, represented by both complex yield loci and kinematic-isotropic hardening models. A first part of this ... [more ▼]

The goal of this research is to study the anisotropic material behavior during forming processes, represented by both complex yield loci and kinematic-isotropic hardening models. A first part of this paper describes the main concepts of the ‘Stress-strain interpolation’ model that has been implemented in the non-linear finite element code Lagamine. This model consists of a local description of the yield locus based on the texture of the material through the full constraints Taylor’s model. The texture evolution due to plastic deformations is computed throughout the FEM simulations. This ‘local yield locus’ approach was initially linked to the classical isotropic Swift hardening law. Recently, a more complex hardening model was implemented: the physically-based microstructural model of Teodosiu. It takes into account intergranular heterogeneity due to the evolution of dislocation structures, that affects isotropic and kinematic hardening. The influence of the hardening model is compared to the influence of the texture evolution thanks to deep drawing simulations. [less ▲]

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See detailDeep drawing process with different elasto-plastic law
de Montleau, P.; Duchene, Laurent ULg; Bouvier, S. et al

in Stören, Sigurd (Ed.) Proceedings of the 7th ESAFORM conference on Material Forming (2004)

Recently, a combination of a texture based yield locus and of the Teodosiu's hardening model has been implemented in the Finite Element code LAGAMINE of the department M&S of the University of Liège. The ... [more ▼]

Recently, a combination of a texture based yield locus and of the Teodosiu's hardening model has been implemented in the Finite Element code LAGAMINE of the department M&S of the University of Liège. The yield locus is able to take into account the texture updating during a FE simulation. The texture evolves with respect to the crystalographic rotations due to the plastic deformations. Two hardening models are considered: the classical Swift istropic hardening model and the Teodosiu's hardening model that is a physically-based microstructural model. It takes into account intergranular heterogeneity due to the evolution of dislocation structures, that affects the isotropic and the kinematic hardening. The aim of the paper is to compare the influence of the hardening with the influence of the yield shape updating due to the texture evolution, on the final plastic anisotropy, for a deep drawing simulation. The tests are performed for the steel FeP06t that presents a non negligible initial anisotropy. [less ▲]

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See detailLocalizable effective theories, bootstrap and the parameters of hadron resonances
Semenov-Tyan-Shanskiy, Kirill ULg; Vereshagin, Alexander; Vereshagin, Vladimir

in AIP Conference Proceedings (2004), 717

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See detailFinite element prediction of the swift effect based on Taylor-type polycrystal plasticity models
Duchene, Laurent ULg; Delannay, L.; Habraken, Anne ULg

in Stören, Sigurd (Ed.) Proceedings of the 7th ESAFORM conference on Materials Forming (2004)

This paper describes the main concepts of the stress-strain interpolation model that has been implemented in the non-linear finite element code Lagamine. This model consists in a local description of the ... [more ▼]

This paper describes the main concepts of the stress-strain interpolation model that has been implemented in the non-linear finite element code Lagamine. This model consists in a local description of the yield locus based on the texture of the material through the full constraints Taylor’s model. The prediction of the Swift effect is investigated: the influence of the texture evolution is shown up. The LAMEL model is also investigated for the Swift effect prediction. [less ▲]

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See detailLes entreprises sociales d’insertion dans l’Union Européenne : un aperçu général
Davister, Catherine; Defourny, Jacques ULg; Grégoire, Olivier

in RECMA – Revue Internationale de l'Economie Sociale (2004), 293

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See detailWork Integration Social Enterprises in the European Union: an Overview of Existing Models
Davister, Catherine; Defourny, Jacques ULg; Grégoire, Olivier

in RECMA – Revue Internationale de l'Economie Sociale (2004), 293

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See detailL’émergence du concept d’entreprise sociale
Defourny, Jacques ULg

in Reflets et Perspectives de la Vie Economique (2004), XLIII(3), 9-23

This paper tries to show how the concept of social enterprise is increasingly used in many countries. In Europe, the most significant steps have been taken by the Italian parliament in the early 90’s and ... [more ▼]

This paper tries to show how the concept of social enterprise is increasingly used in many countries. In Europe, the most significant steps have been taken by the Italian parliament in the early 90’s and since 2002 by the UK government which has decided to map and promote social enterprises. From a scientific point of view, the approach built by the EMES European Research Network, based on comparative research in all EU countries, provides a solid basis for further theoretical and empirical work as well as new insights into the whole social economy. [less ▲]

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See detailLes données du Réseau Wallon de Comptabilité Agricole (RWCA)
Dogot, Thomas ULg; Lebailly, Philippe ULg

in Direction Générale de l'Agriculture, Division de la Politique Agricole (IG1) et Direction de l'Analyse Economique Agricole (D14); Conseil Supérieur Wallon de l'Agriculture, de l'Agro-alimentaire et de l'Alimentation (CSWAAA) (Eds.) Evolution de l'économie agricole et horticole de la Région wallonne en 2002 (2004)

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See detailEcology And Conservation Of Belgian Populations Of Viola Calaminaria, A Metallophyte With A Restricted Geographic Distribution
Bizoux, Jean-Philippe ULg; Brevers, F.; Meerts, P. et al

in Belgian Journal of Botany (2004), 137(1), 91-104

Viola calaminaria (Gingins) Lej. is a rare and threatened species, endemic to metalliferous soils in E Belgium, S Netherlands and W Germany. In order to provide basic information for a conservation ... [more ▼]

Viola calaminaria (Gingins) Lej. is a rare and threatened species, endemic to metalliferous soils in E Belgium, S Netherlands and W Germany. In order to provide basic information for a conservation strategy, we performed an ecogeographic survey of almost all V. calaminaria populations currently existing in Belgium. Twenty-four populations were found, distributed in three geographic groups all in the Province of Liège. The area covered by V. calaminaria ranged from < 1 m2 to 3.2 ha. The largest populations were found in sites contaminated by atmospheric deposits from metal smelters. Soils were extremely variable in heavy metal and nutrient concentrations, but concentrations of Zn, Pb and Cd were consistently higher than reference values for normal soils. V. calaminaria was most often found in association with other metallophyte and pseudometallophyte taxa typical of metalliferous sites. Plant communities identified by TWINSPAN analysis generally fitted the heavy metal associations previously described but two unusual heavy metal plant communities were identified. Based on a canonical correspondence analysis, pH was the only factor that was clearly correlated with the floristic composition of plant communities associated to V. calaminaria. This study confirmed the ecological endemic status of V. calaminaria and the importance of the conservation of metalliferous sites. [less ▲]

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See detailLe cas clinique du mois. Angiomyxome superficiel.
Quatresooz, Pascale ULg; Hermanns, Jean-François ULg; Legrain, A. et al

in Revue Médicale de Liège (2004), 59(3), 128-30

Some cutaneous neoplasms are seemingly harmless, but they may prove to be problematic due to their propensity to invade or to recur. We present 2 cases of superficial angiomyxoma.

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See detailDiet-induced obesity and reduced skin cancer susceptibility in matrix metalloproteinase-19 deficient mice
Pendas, A. M.; Folgueras, A. R.; LLano, E. et al

in Molecular & Cellular Biology (2004), 24(12), 5304-13

Matrix metalloproteinase 19 (MMP-19) is a member of the MMP family of endopeptidases that, in contrast to most MMPs, is widely expressed in human tissues under normal quiescent conditions. MMP-19 has been ... [more ▼]

Matrix metalloproteinase 19 (MMP-19) is a member of the MMP family of endopeptidases that, in contrast to most MMPs, is widely expressed in human tissues under normal quiescent conditions. MMP-19 has been found to be associated with ovulation and angiogenic processes and is deregulated in diverse pathological conditions such as rheumatoid arthritis and cancer. To gain further insights into the in vivo functions of this protease, we have generated mutant mice deficient in Mmp19. These mice are viable and fertile and do not display any obvious abnormalities. However, Mmp19-null mice develop a diet-induced obesity due to adipocyte hypertrophy and exhibit decreased susceptibility to skin tumors induced by chemical carcinogens. Based on these results, we suggest that this enzyme plays an in vivo role in some of the tissue remodeling events associated with adipogenesis, as well as in pathological processes such as tumor progression [less ▲]

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