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See detailINCIDENCES MORPHODYNAMIQUES DE LA TREPANATION DE L'ENDOKARST PAR DES RACINES DU MANTEAU D'ALTERATION. EXEMPLES DANS DES GROTTES DE LA CRAIE EN EUROPE OCCIDENTALE (FRANCE ET BELGIQUE).
Rodet, Joël; Willems, Luc ULg; OGIER-HALIM, Sylvie et al

in White, William B (Ed.) Proceedings : 15th International Congress of Speleology, Kerrville, Texas, United States of America, July 19-26, 2009 (2009)

Le débouché de la zone des puits dans les galeries du karst est considéré traditionnellement comme une suite logique de la pénétration des eaux de surface vers les collecteurs souterrains. C'est pourquoi ... [more ▼]

Le débouché de la zone des puits dans les galeries du karst est considéré traditionnellement comme une suite logique de la pénétration des eaux de surface vers les collecteurs souterrains. C'est pourquoi les observations se limitent généralement à de simples descriptions morphologiques. La mise en évidence de deux ensembles dynamiques distincts, l'introduction des eaux superficielles (karst d’introduction) et la collecte/concentration/restitution aux exsurgences des eaux souterraines (karst de restitution), et l’absence de connexion systématique entre karst d'introduction et karst de restitution permettent d’envisager une évolution initialement séparée, voire diachronique, de ces deux ensembles dynamiques. Afin de vérifier cette hypothèse, nous avons étudié l’impact de la trépanation de grottes dans deux réseaux karstiques d’Europe occidentale. Le premier en Normandie (France) se développe dans des craies fines où la porosité de la roche peut atteindre 10 à 15 %. Le second se situe en Basse Meuse liégeoise (Belgique) dans des calcarénites pouvant dépasser 50 % de porosité efficace. La cavité normande, mature et fossile, est largement comblée de sédiments quaternaires (loess). Elle est reconnue sur plus de 600 m, dont un collecteur de 450 m de développement. La trépanation du collecteur fossile et comblé et son fonctionnement séquentiel ont entraîné une ablation de la partie supérieure du comblement et sa substitution par la charge terrigène introduite par les épisodes d'introduction, avec une sédimentation conforme à la dynamique de l'introduction. Mais l'incidence majeure de ces épisodes est la mise en place d'une morphologie spécifique, organisée de l'amont vers l'aval : effet barrage vers l'amont du drain avec une altération profonde de l'encaissant, ouverture d'une rampe de connexion en toit avec le drain, développement d'un chenal de voûte pénétrable, ouverture d'un grand volume vide - réservoir d'équilibre, creusement d'un chenal de voûte plus petit, qui se réduit en aval au fur et à mesure de l'absorption du flux aqueux par le remplissage et les parois du collecteur. La cavité belge, reconnue sur quelques dizaines de mètres de développement, est comblée de sédiments terrigènes, sans qu’aucune liaison karstique ne soit établie avec une quelconque émergence. L'absence de continuité karstique aval interdit le creusement du chenal de voûte, mais on retrouve le comblement terrigène granoclassé, retouché par les épisodes plus récents, et en aval le développement d'une grande chambre réservoir où la porosité élevée des calcarénites encaissantes absorbe l'eau introduite. Ces deux exemples montrent très clairement que la connexion entre l'introduction des eaux et la restitution karstique n'est pas toujours assurée et surtout que le creusement des formes d'introduction peut se réaliser indépendamment du drainage de restitution. Lorsque que ce dernier est trépané alors qu'il n'est plus fonctionnel, il enregistre les effets d'une dynamique d'introduction. La recherche de ces morphologies dans les collecteurs peut alors livrer de sérieuses indications sur l'évolution du système karstique. [less ▲]

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See detailIntegrating Succession and Gender Issues from the Perspective of the Daughter of Family Enterprise across the U.S. and EU
Constantinidis, Christina ULg; Nelson, Teresa

in Management International = International Management = Gestión Internacional (2009), 14(1), 43-54

We engage a gender analysis, including consideration of the social phenomena of separation and hierarchy, to consider the role, condition and aspirations of daughters of family enterprise as they consider ... [more ▼]

We engage a gender analysis, including consideration of the social phenomena of separation and hierarchy, to consider the role, condition and aspirations of daughters of family enterprise as they consider the option of family entrepreneurship. From this perspective we examine the extant literature and present findings from two exploratory empirical research efforts, one in Belgium and one in the U.S., to better understand internationally how daughters perceive their leadership paths in the family business. We take into consideration growing social acceptance of women’s leadership, and women’s own career-mindedness, which influence traditional views of the opportunities for daughters inside and outside of the family business. Research avenues and practical recommendations to support successful succession of daughters are discussed. [less ▲]

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See detailBranching fractions and A values in singly ionized tantalum (Ta II)
Quinet, Pascal ULg; Fivet, V.; Palmeri, P. et al

in Astronomy and Astrophysics (2009), 493

Aims. We report on the theoretical and experimental lifetimes of Ta II, and calculated branching fractions for selected transitions. Methods. The theoretical data are obtained by means of a relativistic ... [more ▼]

Aims. We report on the theoretical and experimental lifetimes of Ta II, and calculated branching fractions for selected transitions. Methods. The theoretical data are obtained by means of a relativistic Hartree-Fock method with detailed attention to correlation effects. The experimental lifetimes are measured with the time-resolved, laser-induced, fluorescence technique. Results. The calculated results are in good agreement with both previously known and new experimental lifetimes. New transition probabilities have been deduced for a set of Ta II transitions of astrophysical interest. [less ▲]

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See detailFaciogenital dysplasia protein Fgd1 regulates invadopodia biogenesis and extracellular matrix degradation and is up-regulated in prostate and breast cancer.
Ayala, Inmaculada; Giacchetti, Giada; Caldieri, Giusi et al

in Cancer Research (2009), 69(3), 747-52

Invadopodia are proteolytically active membrane protrusions that extend from the ventral surface of invasive tumoral cells grown on an extracellular matrix (ECM). The core machinery controlling ... [more ▼]

Invadopodia are proteolytically active membrane protrusions that extend from the ventral surface of invasive tumoral cells grown on an extracellular matrix (ECM). The core machinery controlling invadopodia biogenesis is regulated by the Rho GTPase Cdc42. To understand the upstream events regulating invadopodia biogenesis, we investigated the role of Fgd1, a Cdc42-specific guanine nucleotide exchange factor. Loss of Fgd1 causes the rare inherited human developmental disease faciogenital dysplasia. Here, we show that Fgd1 is required for invadopodia biogenesis and ECM degradation in an invasive cell model and functions by modulation of Cdc42 activation. We also find that Fgd1 is expressed in human prostate and breast cancer as opposed to normal tissue and that expression levels matched tumor aggressiveness. Our findings suggest a central role for Fgd1 in the focal degradation of the ECM in vitro and, for the first time, show a connection between Fgd1 and cancer progression, proposing that it might function during tumorigenesis. [less ▲]

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See detailDesign procedure of a nonlinear vibration absorber using bifurcation analysis : application to the drill-string system
Viguié, Régis ULg; Kerschen, Gaëtan ULg

in ASME International Design Engineering Technical Conferences, San Diego, 2009 (2009)

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See detailLipofibromatous hamartoma of the median nerve. Three case reports.
Nardella, D; Sohawon, S; CARLIER, Alain ULg

in Journal of Plastic, Reconstructive and Aesthetic Surgery (2009), 62(9), 314-7

Nervous lipofibromatous hamartoma is a rare tumour-like condition involving the peripheral nerves, whereby the epineurium and perineurium are enlarged and distorted by excess fatty and fibrous tissues ... [more ▼]

Nervous lipofibromatous hamartoma is a rare tumour-like condition involving the peripheral nerves, whereby the epineurium and perineurium are enlarged and distorted by excess fatty and fibrous tissues that infiltrate between and around nerve boundaries. The median nerve is much more likely than other nerves to develop a hamartoma with a predilection for the carpal tunnel. In this article, we describe three cases of lipofibromatous hamartoma of the median nerve and discuss its management. [less ▲]

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See detailModeling the Vertical Spincasting of Large Bimetallic Rolling Mill Rolls
Studer, Léo ULg; Detrembleur, Sylvain ULg; Dewals, Benjamin ULg et al

in Ambrosio, J. (Ed.) Proceedings of the 7th EUROMECH Solid Mechanics Conference (2009)

In order to take into account the dynamic effects of molten metal during solidification, a methodology is presented to interface a metal solidification solver (coupled thermal mechanical metallurgical ... [more ▼]

In order to take into account the dynamic effects of molten metal during solidification, a methodology is presented to interface a metal solidification solver (coupled thermal mechanical metallurgical finite elements solver) with a specifically developed flow dynamics solver. (flow dynamics and thermics finite volume solver) The numerical set of tools is designed to be used for the simulation of bimetallic hot rolling mill rolls vertical spincasting. Modeling the industrial process for these products imply certain specifications on the numerical methods used, mainly due to the size of the geometrical domain, low Rossby & Ekman numbers, and a high Reynolds number. [less ▲]

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See detailGuidelines for an integrated diagnostic approach of chronic lymphoproliferative disorders in the routine laboratory of haematology in Belgium.
Nollet, F.; Bakkus, M.; Meeus, P. et al

in Acta Clinica Belgica (2009), 64(6), 494-504

This paper summarizes the minimal workout of chronic lymphoproliferative disorders in a routine laboratory of haematology as recommended by a team of experienced laboratory supervisors in Belgium, taking ... [more ▼]

This paper summarizes the minimal workout of chronic lymphoproliferative disorders in a routine laboratory of haematology as recommended by a team of experienced laboratory supervisors in Belgium, taking into account the specific organisation of healthcare in Belgium, the innovations in the field of molecular analyses and related reimbursement. The starting point was essentially based upon clinical and/or haematological indications and it is emphasized that conclusions should be drawn in close dialogue with the clinician and experts in cytogenetics and histopathology. Reports made in the laboratory should be based upon an integration of cytomorphological, immunophenotypical and molecular data. These guidelines are not intended to be used as universal 'diagnostic pathways', but should be useful in developing local diagnostic pathways. It is well understood that this consensus, being valid anno 2009, may rapidly change with new technologies being introduced and new targets discovered. [less ▲]

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See detailDecentralized reactive power dispatch for a time-varying multi-TSO system
Phulpin, Yannick; Begovic, Miroslav; Petit, Marc et al

in Proceedings of the 42nd Hawaii International Conference on System Sciences (HICSS-42) (2009)

This paper addresses the problem of reactive power dispatch in a power system partitioned into several areas controlled by different transmission system operators. Previous research has shown that nearly ... [more ▼]

This paper addresses the problem of reactive power dispatch in a power system partitioned into several areas controlled by different transmission system operators. Previous research has shown that nearly optimal performance could be achieved in a time-invariant system by using a specific iterative decentralized control scheme with no information exchange. At each iteration of this scheme, every transmission system operator concurrently schedules its own control settings for the next iteration while representing the neighboring areas with external network equivalents. This paper focuses on some parameter tracking techniques to extend the range of application of the decentralized control scheme to time-varying systems, where the time-varying nature of the system is modeled as a succession of steady-state operating conditions with variation of the load demand. Those new techniques are evaluated in the context of IEEE 118 bus system partitioned into three control areas. [less ▲]

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See detailIdentification of equid herpesvirus-5 in respiratory liquids: A retrospective study of 785 samples taken in 2006-2007
Fortier, Guillaume; Pronost, Stéphane; Miszczak, Fabien et al

in Veterinary Journal (2009), 182

During a case control study undertaken in 2006-2007, a screening and consensus polymerase chain reaction (PCR) was performed to evaluate the potential role of equid herpesviruses (EHV) in several ... [more ▼]

During a case control study undertaken in 2006-2007, a screening and consensus polymerase chain reaction (PCR) was performed to evaluate the potential role of equid herpesviruses (EHV) in several occurrences of respiratory disorders in 661 horses. Of 785 bronchoalveolar or tracheal lavage fluid samples submitted for analysis, 20 were positive for EHV-5 DNA by sequential analysis of the consensus PCR product. Nineteen of those samples were confirmed using a specific EHV-5 PCR. No particular changes in cytological profile could be associated with the detection of EHV-5 in contrast to suggestions in previous reports of natural or experimental respiratory viral infections in horses or ponies. This is the first description of EHV-5 isolation in equine respiratory fluids in Europe, but further investigations are needed to determine the potential pathogenic role of this gammaherpesvirus in the horse. [less ▲]

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See detailVariability of major fatty acid contents in Luxembourg dairy cattle
Soyeurt, Hélène ULg; Arnould, Valérie ULg; Dardenne, Pierre et al

in Book of Abstracts of the 60th Annual Meeting of the European Association for Animal Production (2009)

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See detailVaccines and vaccination. The principles and the polemics
Horzinek, M. C.; Thiry, Etienne ULg

in Journal of Feline Medicine and Surgery (2009), 11

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See detailDetection and quantification of non-linear dynamic behaviour of space structures
Hot, A.; Cogan, S.; Foltete, E. et al

in 11th European Conference on Spacecraft Structures, Materials and Mechanical Testing, Toulouse, 2009 (2009)

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See detailFeline panleukopenia virus infection. ABCD guidelines on prevention and management
Truyen, U.; Addie, D.; Belak, B. et al

in Journal of Feline Medicine and Surgery (2009), 11

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See detailLarge scale experimental study of piano key weirs
Machiels, Olivier ULg; Erpicum, Sébastien ULg; Archambeau, Pierre ULg et al

in Proc. 33rd IAHR Congress: Water Engineering for a Sustainable Environment (2009)

Piano Key Weirs (PKW) are a new type of weir, showing very good flood release capacities as well as strong economic and structural benefits. However, lacks of understanding persist about the flow ... [more ▼]

Piano Key Weirs (PKW) are a new type of weir, showing very good flood release capacities as well as strong economic and structural benefits. However, lacks of understanding persist about the flow conditions on such structures. With the goal to fill some of these lacks, a combined experimental and numerical study has been undertaken at the Laboratory of Structures Hydraulics of the University of Liege. This paper presents the goals and the scientific strategy of this research. The first results of experiments being carried out on a large physical model of PKW are also depicted. These experiments lead to characterization of the flow behavior for low heads and enable to highlight the influence of the crest thickness and the outlet slope on the release capacity. [less ▲]

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See detailDesign procedure of a nonlinear vibration absorber using bifurcation analysis: application to a drill-string system
Viguié, Régis ULg; Kerschen, Gaëtan ULg

in Euromech 503, Nonlinear Normal Modes, Dimension Reduction and Localization in Vibrating Systems, Frascati, 2009 (2009)

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See detailWho's in charge? Nuclear receptor coactivator and corepressor function in brain and behavior.
Tetel, M. J.; Auger, A. P.; Charlier, Thierry ULg

in Frontiers in Neuroendocrinology (2009), 30

Steroid hormones act in brain and throughout the body to regulate a variety of functions, including development, reproduction, stress and behavior. Many of these effects of steroid hormones are mediated ... [more ▼]

Steroid hormones act in brain and throughout the body to regulate a variety of functions, including development, reproduction, stress and behavior. Many of these effects of steroid hormones are mediated by their respective receptors, which are members of the steroid/nuclear receptor superfamily of transcriptional activators. A variety of studies in cell lines reveal that nuclear receptor coregulators are critical in modulating steroid receptor-dependent transcription. Thus, in addition to the availability of the hormone and the expression of its receptor, nuclear receptor coregulators are essential for efficient steroid-dependent transactivation of genes. This review will highlight the importance of nuclear receptor coregulators in modulating steroid-dependent gene expression in brain and the regulation of behavior. [less ▲]

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See detailDéveloppement durable des races bovines locales menacées
Bay, Elodie

Article for general public (2009)

Le projet EURECA a pour but d'assister la conservation, le développement et l'utilisation des races bovines locales, et ce en se basant sur l'étude de races locales dans 10 pays européens. Ce projet (d ... [more ▼]

Le projet EURECA a pour but d'assister la conservation, le développement et l'utilisation des races bovines locales, et ce en se basant sur l'étude de races locales dans 10 pays européens. Ce projet (d'une durée totale de 3 ans) est coordonné au niveau belge par le Faculté des Sciences Agronomiques de Gembloux. La première phase du projet, présentée dans cet article, a consisté à interroger des éleveurs et des parties prenantes à l'aide d'un formulaire standard, afin de comprendre comment s'intègre les races locales au niveau des différents intervenants. L'étude a porté sur la Pie Rouge Mixte (PRm) et la Blanc Bleu Mixte (BBm). [less ▲]

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See detailLa conservation du poisson au Senegal : utilisation d’une souche locale de Lactococcus lactis
Diop, Michel; Destain, Jacqueline ULg; Thonart, Philippe ULg et al

in Cahiers Agricultures (2009), 18(4), 337-342

L’effet antimicrobien du surnageant de culture neutralisé (SCN) bactéricide issu de Lactococcus lactis CWBI-B1410 d’origine locale, utilisé seul ou en combinaison avec du chlorure de sodium (NaCl) comme ... [more ▼]

L’effet antimicrobien du surnageant de culture neutralisé (SCN) bactéricide issu de Lactococcus lactis CWBI-B1410 d’origine locale, utilisé seul ou en combinaison avec du chlorure de sodium (NaCl) comme conservateurs, a été évalué sur poissons maigre (Pomadasys jubelini), moyennement gras (Polydactylus quadrifilis) et gras (Arius heudeloti)] au Sénégal. Les poissons ont été achetés dans un marché local, éviscérés, lavés avec de l’eau de robinet potable, puis filetés. Cent millilitres de SCN de CWBI-B1410 non salé et salé ont été additionnés dans 100 grammes de filets (concentration finale de NaCl entre 0 et 7 %) dans des bocaux en verre conservés à 10 °C. L’évolution de la flore mésophile totale (FMT) des filets a été comparée à celles de filets traités avec du SCN non salé et salé (concentration finale de NaCl entre 0 et 7 %), issu de L. lactis LMG6890 ne produisant pas de bactériocine. Un niveau de FMT de 106 micro-organismes par gramme (ufc/g) a été considéré comme la fin de la durée de conservation. Le niveau de la flore mésophile totale des filets crus atteignait 5,74 log ufc/g. L’ajout de SCN de CWBI-B1410 dans les filets de poisson maigre réduit la flore mésophile totale de 1 log ufc/g et stabilise la flore pendant 4 jours – correspondant à la durée de conservation de ces filets a` 10 °C, contre 0,5 jour pour le contrôle négatif. L’addition de SCN de CWBIB1410 salé sur les poissons (NaCl, 7 %) réduit davantage la FMT et retarde sa croissance à 10°C, entraînant comme résultat l’augmentation de la durée de conservation de respectivement 12, 7,5 et 8 jours pour le poisson maigre, moyennement gras et gras. Ces résultats suggèrent que cette stratégie peut constituer un moyen convenable d’améliorer la conservation des produits halieutiques tropicaux. [less ▲]

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