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See detailComparison of the Severity of Standards Used for the Vibration Testing of Luminaires
Marin, Frédéric; Golinval, Jean-Claude ULg; Marville, Christian et al

Conference given outside the academic context (2003)

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See detailLa peine de travail - Quelques observations pratiques
Jacobs, Ann ULg

in Revue de Jurisprudence de Liège, Mons et Bruxelles (2003)

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See detailFundamentals of finite elements
Debongnie, Jean-François ULg

Book published by Les Editions de l'Université de Liège (2003)

This book presents the text of an introductory course on finite element methods. As written by a member of the Aerospace Laboratory of the University of Liège, it reflects the general philosophy of this ... [more ▼]

This book presents the text of an introductory course on finite element methods. As written by a member of the Aerospace Laboratory of the University of Liège, it reflects the general philosophy of this pioneering research team. [less ▲]

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See detailMagnetic and mossbauer spectral study of ErFe11Ti and ErFe11TiH
Piquer, C.; Hermann, Raphaël ULg; Grandjean, Fernande ULg et al

in Journal of Applied Physics (2003), 93(6), 3414-3421

X-ray diffraction, isothermal magnetization at 5 and 300 K, ac magnetic susceptibility measurements between 5 and 200 K, and iron-57 Mossbauer spectral measurements between 4.2 and 295 K have been carried ... [more ▼]

X-ray diffraction, isothermal magnetization at 5 and 300 K, ac magnetic susceptibility measurements between 5 and 200 K, and iron-57 Mossbauer spectral measurements between 4.2 and 295 K have been carried out on ErFe11Ti and ErFe11TiH. Hydrogen uptake has been measured by gravimetric analysis and the insertion of hydrogen into ErFe11Ti increases its magnetization, magnetic hyperfine fields, and isomer shifts as a result of the associated lattice expansion. Peaks and steplike changes in both the real and imaginary components of the ac magnetic susceptibility are observed at similar to50 and 40 K for ErFe11Ti and ErFe11TiH, respectively, and are assigned to spin-reorientation transitions resulting from the temperature dependence of the sixth-order Stevens crystal-field term of erbium. The Mossbauer spectra have been analyzed with a model which considers both these spin reorientations and the distribution of titanium atoms in the near-neighbor environment of the three crystallographically distinct iron sites. The assignment and the temperature dependencies of the hyperfine fields and isomer shifts are in complete agreement with the Wigner-Seitz cell analysis of the three iron sites in ErFe11Ti and ErFe11TiH. The changes in the hyperfine field and isomer shift with the number of titanium near neighbors of the three iron sites are in agreement with the values observed for related titanium-iron intermetallic compounds. (C) 2003 American Institute of Physics. [less ▲]

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See detailPlmA, a new member of the GntR family, has plasmid maintenance functions in Anabaena sp. strain PCC 7120
Lee, M. H.; Scherer, K.; Rigali, Sébastien ULg et al

in Journal of Bacteriology (2003), 185(15), 4315-4325

The filamentous cyanobacterium Anabaena (Nostoc) sp. strain PCC 7120 maintains a genome that is divided into a 6.4-Mb chromosome, three large plasmids of more that 100 kb, two medium-sized plasmids of 55 ... [more ▼]

The filamentous cyanobacterium Anabaena (Nostoc) sp. strain PCC 7120 maintains a genome that is divided into a 6.4-Mb chromosome, three large plasmids of more that 100 kb, two medium-sized plasmids of 55 and 40 kb, and a 5.5-kb plasmid. Plasmid copy number can be dynamic in some cyanobacterial species, and the genes that regulate this process have not been characterized. Here we show that mutations in an open reading frame, all1076, reduce the numbers of copies per chromosome of several plasmids. In a mutant strain, plasmids pCC7120delta and pCC7120zeta are both reduced to less than 50% of their wild-type levels. The exogenous pDU1-based plasmid pAM1691 is reduced to less than 25% of its wild-type level, and the plasmid is rapidly lost. The peptide encoded by all1076 shows similarity to members of the GntR family of transcriptional regulators. Phylogenetic analysis reveals a new domain topology within the GntR family. PlmA homologs, all coming from cyanobacterial species, form a new subfamily that is distinct from the previously identified subfamilies. The all1076 locus, named plmA, regulates plasmid maintenance functions in Anabaena sp. strain PCC 7120. [less ▲]

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See detailEditorial. Vers le troisième départ du mélèze en Région wallonne
Hebert, Jacques ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2003), 7(1), 3-4

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See detailSylviculture et qualité du bois de l'épicéa en Région wallonne. Recommandations pratiques - Cahier technique n°22
Hebert, Jacques ULg; Herman, M.; Jourez, B.

in Forêt Wallonne (2003), (62), 10-13

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See detailLes mélèzes, un nouveau défi pour la sylviculture des résineux en Wallonie
Rondeux, Jacques ULg

Book (2003)

The larch is a really worth considering species in the walloon region especially in forests from which sustained management and multi-functional aspects are sought. Because of its rapid growth rate, its ... [more ▼]

The larch is a really worth considering species in the walloon region especially in forests from which sustained management and multi-functional aspects are sought. Because of its rapid growth rate, its wood of high quality and its environmental effects (landscape) as well as its ecological impact (biodiversity enhancement, wildlife habitat improvement) larch has to pay a role in the achievement of most management purposes. However its silviculture in terms of method, severity and timing of thinning is not sufficiently related to its ecology and its high juvenile growth. Among the three larch species the hybrid larch is quite promising but adequate silviculture has to be applied during the course of its development. The present paper gives some guidelines for constructing silvicultural scenarios able to ensure economic returns and a proper balance between the non marketed forms of production like aesthetic value, biodiversity, game and recreation. [less ▲]

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See detailLes décrets oraculaires pris en l’honneur d’Hénouttaouy et de Maatkarê (Xe et VIIe pylônes)
Winand, Jean ULg

in Cahiers de Karnak (2003), (11), 603-710

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See detailVision d'acteurs : le Conseil supérieur wallon des forêts et de la filière bois
Rondeux, Jacques ULg

in Actes du colloque "Le droit international dans le domaine de l'environnement. Quelles implications pour la région wallonne ?" (2003)

9 organes consultatifs wallons concernés par les matières environnementales ont décidé de mettre sur pied une journée de réflexion sur le droit international dans le domaine de l'environnement. L'objectif ... [more ▼]

9 organes consultatifs wallons concernés par les matières environnementales ont décidé de mettre sur pied une journée de réflexion sur le droit international dans le domaine de l'environnement. L'objectif est de donner une vision d'ensemble du droit international existant et en projet dans ce domaine et d'en cerner les implications pour la Région wallonne. [less ▲]

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See detailOverexpression of the platelet P2X1 ion channel in transgenic mice generates a novel prothrombotic phenotype.
Oury, Cécile ULg; Kuijpers, Marijke; Toth-Zsamboki, Emese et al

in Blood (2003)

This study describes transgenic mice overexpressing the human P2X(1) ion channel in the megakaryocytic cell lineage. Platelets from these mice display increased secretion and aggregation evoked by low ... [more ▼]

This study describes transgenic mice overexpressing the human P2X(1) ion channel in the megakaryocytic cell lineage. Platelets from these mice display increased secretion and aggregation evoked by low doses of collagen, convulxin, or the thromboxane A(2) mimetic U46619. Perfusing whole blood from transgenic mice over collagen fibers at a shear rate of 1000 seconds(-1) resulted in increased P2X(1)-dependent aggregate formation and phosphatidylserine exposure. Platelet hyperreactivity to collagen was correlated with up-regulated extracellular signal-regulated kinase 2 (ERK2) phosphorylation. In a viscometer, shear stress caused potent aggregation of transgenic platelets under conditions in which wild-type platelets did not aggregate. In an in vivo model of thromboembolism consisting of intravenous injection of a low dose of collagen plus epinephrine, transgenic mice died more readily than wild-type mice. Preinjection of U0126 not only fully protected transgenic mice against thrombosis, it also enhanced the survival of wild-type mice injected with a higher collagen dose. Hence, the platelet P2X(1) ion channel plays a role in hemostasis and thrombosis through its participation in collagen-, thromboxane A(2)-, and shear stress-triggered platelet responses. Activation of the ERK2 pathway is instrumental in these processes. [less ▲]

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See detailCe que MOHICAN a montré ou les 12 travaux de MOHICAN
Leclercq, Dieudonné ULg

Report (2003)

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See detailVirus infections in pathogenesis of type 1 diabetes
Brilot, Fabienne; Geenen, Vincent ULg

in International Diabetes Monitor (2003), 14

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See detailEléments traces métalliques dans les sols. Contribution à l'étude de leur déterminisme spatial en Région limoneuse belge.
Colinet, Gilles ULg

Doctoral thesis (2003)

The natural background levels of metallic trace elements (MTEs) in cultiva-ted soils should be known in order (i) to understand the processes in which MTEs are involved and (ii) settle a reference system ... [more ▼]

The natural background levels of metallic trace elements (MTEs) in cultiva-ted soils should be known in order (i) to understand the processes in which MTEs are involved and (ii) settle a reference system dedicated to the the ap-praisal of agricultural practices, to the detection of contaminations, or to the time-course follow-up of regional values. A methodological framework has thus been set up to evaluate the importance of natural driving factors, the pe-dogeochemical background, of the spatial distribution of MTEs in soils and also to compare the current levels of MTEs content in agricultural soils from the Loamy Region with natural values. As main results from the study of parent materials, (i) lithological units are now characterized with element content signatures, (ii) the prominent part of clay, total iron, and total aluminium contents as driving factors of the content in MTEs has been measured, and (iii) the geographical homogeneity as well as the absence of spatial continuity of the cover loessic parent material have been showed up. The relations between MTEs and driving variables have been confirmed through the study of the influences of pedogenesis factors on the vertical and lateral differenciations of MTEs content in soils. It was also demonstrated that taking into account the natural volumes of soils when sam-pling facilitates the interpretation of the results and allows finer estimations of the MTEs content, even in homogeneous context. The reference values about natural and usual content in MTEs for various soil horizons that are proposed reveal a relatively weak level of man-made contamination in the Loamy Re-gion. It has also been shown that a regional reference system dedicated to the detec-tion of local contaminations gains in relevance as it integers ancillary datas as well as the local specificities of small natural regions. The spatial variability of MTEs content has been evaluated through various cartographic approaches which led to the conclusion that the Soil Map of Belgium is an extremely worthy document for geochemical mapping. [less ▲]

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See detailLa Zone Villageoise de Chasse de Sia (Ranch de Gibier de Nazinga, Burkina Faso)
Vermeulen, Cédric ULg; Ouédraogo, M.

in Parcs & Réserves (2003), 58(2), 32-44

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See detailMarchés immobiliers résidentiels et étalement urbain contraint. L'accessibilité au logement au sein de la région métropolitaine bruxelloise
Dubois, O.; Halleux, Jean-Marie ULg

in Belgeo (2003), (3), 303-327

The release of mobility constraints has facilitated urban sprawl, i.e. the increasing spatial dissociation between urban cores and implantation sites of households and economic activities. The aim of this ... [more ▼]

The release of mobility constraints has facilitated urban sprawl, i.e. the increasing spatial dissociation between urban cores and implantation sites of households and economic activities. The aim of this paper about the Walloon part of the Brussels metropolitan region is to analyse how housing market constraints reinforce the trend towards residential sprawl. Based on an analysis of the financial accessibility to both, the market for new housings and the market for pre-existing housings, it is here the influence of the price level decreasing with the distance from Brussels which is taken into account. Due to their limited financial resources and to this price gradient, many households are obliged to settle on remote sites in order to acquire their property goods. In relation to this phenomenon, it appears that, from a spatial as well as from a social point of view, the Brussels urban system is not able to settle the metropolitan growth on an adapted way. Indeed, new residential locations reinforce the increasing dissociation between work places and living places, which leads to a useless increase in mobility costs as well as a serious accentuation of socio-spatial segregations. [less ▲]

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See detailPolitiques foncières et mécanismes fonciers en Wallonie : objectifs politiques, outils juridiques et mise en œuvre
Dubois, O.; Halleux, Jean-Marie ULg

in Ruimte & Planning (2003), (4), 265-283

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See detailDevelopment Of Real-Time Rt-Pcr Assay For Detection Of Prunus Necrotic Ringspot Virus In Fruit Trees
Marbot, Sophie; Vendrame, Marina; Huwaert, Astrid et al

in Plant Disease (2003), 87(11), 1344-1348

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See detailGuide pratique pour la prospective régionale en Belgique
Heselmans, Frédéric ULg

Book published by Publication de la Commission européenne. Directon générale de la recherche (2003)

En Belgique la pratique de la prospective, entendue sous la forme d'exercices découlant des méthodes appelées dans les pays anglo-saxons «foresight», n'est pas encore à proprement parler devenue monnaie ... [more ▼]

En Belgique la pratique de la prospective, entendue sous la forme d'exercices découlant des méthodes appelées dans les pays anglo-saxons «foresight», n'est pas encore à proprement parler devenue monnaie courante. Toutefois, diverses initiatives, tant au niveau fédéral qu'a différents niveaux régionaux ou subrégionaux ont vu le jour ces dernières années11. S'il existe un point commun entre ces exercices, de l'avis même de ceux qui ont eu à les mettre en oeuvre, c'est sans doute la difficulté de trouver un consensus sur les méthodes et les techniques à utiliser. Les décideurs ou les experts sont confrontés au même problème: aujourd'hui il n'existe pas un paradigme unique de la prospective mais une multitude de pratiques plus ou moins rigoureuses. Ce guide se donne pour objectif d'éclairer le lecteur sur le paysage de ces différentes pratiques en mettant l'accent sur les conditions possibilité de leur mise en oeuvre et leurs avantages respectifs. Nous espérons que ces quelques balises permettront à tous ceux qui souhaitent se lancer dans l'aventure de la prospective, à quelque niveau que ce soit en Belgique, d'éviter les errements que leurs prédécesseurs ont parfois connu et en tout cas leur permettront de faire les choix les plus opportuns en connaissance de cause. [less ▲]

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