References of "2003"
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See detailLe positionnement multidimensionnel : principes et applications
Palm, Rodolphe ULg

in Notes de Statistique et d'Informatique (2003), (1), 1-32

This note describes some multidimensional scaling methods for two-way, one-mode tables and for three-way, two-mode tables. The methods are illustrated by an example processed by PROC MDS of SAS software.

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See detailGeneration of spatially correlated wind histories
Denoël, Vincent ULg

in Proceedings of the first Internation Conference on Finite Element Methods (2003)

Turbulent wind is a natural and therefore random phenomenon. The analysis of flexible structures subjected to turbulent wind requires, in a finite element approach, the resolution of a system of ... [more ▼]

Turbulent wind is a natural and therefore random phenomenon. The analysis of flexible structures subjected to turbulent wind requires, in a finite element approach, the resolution of a system of stochastic differential equations. It is supposed that the characteristics of the structure are perfectly known; thus the stochastic aspect of the problem comes from the random loading only. As the turbulent wind is most commonly characterized by its frequency content, the resolution of this equation is generally performed in the frequency domain. All governing equations must therefore be linear. If this can be reasonably supposed for the structure, this hypothesis is not mathematically justified for the wind loading. When the non linear behaviour of any part of the structure has to be accounted for, the resolution in the frequency domain is not valid anymore. It is then necessary to compute, with a step-by-step dynamic analysis, the response of the structure to a series of generated wind histories. In a finite element approach, this is for example achieved thanks to Newmark’s or Wilson’s methods. Averaging across the ensemble of the computed time-varying responses allows then to recover statistical results that a stochastic analysis would provide. This analysis method is known as a stochastic Monte Carlo simulation. After having emphasised the need to represent correctly the coherence between wind pressures at different points of the structure, this paper will present a method for generating a set of correlated wind histories that must be used in a finite element analysis. Finally an example of application of the presented method will prove its efficiency. [less ▲]

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See detailLichenometric application to recent dynamics and sediment transport of a Corsican stream (Figarella River– France).
Gob, Frédéric ULg; Petit, François ULg; Bravard, J. P. et al

in Quaternary Science Reviews (2003)

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See detailExperimental and numerical study on mechanoregulation of tissue differentiation around a loaded implant in a bone chamber
Van Oosterwyck; Geris, Liesbet ULg; Duyck, Joke et al

in Bischoff, G.; Hein, H.-J. (Eds.) Proceedings of the seventh conference of ESEM (2003)

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See detailSynthèse de ligands ditopiques en tant qu’agents de contraste pour l’imagerie de résonance magnétique.
Thonon, David ULg; Paris, Jérôme; Humblet, Jacques et al

Poster (2003)

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See detailLow T-cell chimerism is not followed by graft rejection after nonmyeloablative stem cell transplantation (NMSCT) with CD34-selected PBSC.
Baron, Frédéric ULg; Baudoux, Etienne ULg; Frere, Pascale ULg et al

in Bone Marrow Transplantation (2003), 32(8), 829-34

We investigate the feasibility of CD34-selected peripheral blood stem cell (PBSC) transplantation followed by pre-emptive CD8-depleted donor lymphocyte infusions (DLI) after a minimal conditioning regimen ... [more ▼]

We investigate the feasibility of CD34-selected peripheral blood stem cell (PBSC) transplantation followed by pre-emptive CD8-depleted donor lymphocyte infusions (DLI) after a minimal conditioning regimen. Six patients with advanced hematological malignancies ineligible for a conventional myeloablative transplant (n=5) or metastatic renal cell carcinoma (n=1), and with an HLA-identical (n=4) or alternative (n=2) donor were included. The nonmyeloablative conditioning regimen consisted in 2 Gy TBI alone (n=4), 2 Gy TBI and fludarabine (RCC patient, n=1) or cyclophosphamide and fludarabine (patient who had previously received 12 Gy TBI, n=1). Post transplant immunosuppression was carried out with cyclosporin (CyA) and mycophenolate mofetil (MMF). Initial engraftment was achieved in all patients. One out of six patients (17%) experienced grade > or =2 acute GVHD only after abrupt cyclosporin discontinuation and alpha interferon therapy for life-threatening tumor progression. T-cell chimerism was 23% (19-30) on day 28, 32% (10-35) on day 100, 78% (49-95) on day 180 and 99.5% (99-100) on day 365. Three out of four patients who had measurable disease before the transplant experienced a complete response. We conclude that CD34-selected NMSCT followed by CD8-depleted DLI is feasible and preserves engraftment and apparently also the graft-versus-leukemia (GVL) effect. Further studies are needed to confirm this encouraging preliminary report. [less ▲]

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See detailINCIDENCE DE LA METEOROLOGIE LOCALE SUR LES FLUCTUATIONS DE POPULATION DU TETRAS LYRE (TETRAO TETRIX L.)-
Loneux, Michèle ULg; Vandiepenbeeck, Marc

in Publications de l'Association Internationale de Climatologie (2003), 15

Adapté à des climats rudes et des hivers froids et enneigés, le tétras lyre (Petit coq de bruyère Tetrao tetrix. Oiseau Galliforme) a une répartition géographique boréo-montagnarde. Les résultats d'une ... [more ▼]

Adapté à des climats rudes et des hivers froids et enneigés, le tétras lyre (Petit coq de bruyère Tetrao tetrix. Oiseau Galliforme) a une répartition géographique boréo-montagnarde. Les résultats d'une modélisation statistique originale ont montré que les T° minimales et les précipitations locales, enregistrées au cours de certaines périodes cruciales du cycle de vie de l'oiseau, interviennent comme variables explicatives pour reproduire les fluctuations des effectifs annuels recensés depuis 20 et 30 ans en Belgique, Allemagne, Grande-Bretagne et Pays-Bas. Des résultats communs hautement significatifs confirment le rôle négatif des hivers doux et des précipitations pendant la période de reproduction (couvaison et premières semaines des poussins), et le rôle positif des températures chaudes pendant la période d'éclosion des jeunes. La qualité des résultats obtenus, la nature des variables météorologiques impliquées et le contexte de réchauffement climatique global nous ont fait chercher d'éventuelles tendances parmi les variables utilisées. Elles se sont révélées significatives en comparant l'évolution des moyennes standard de températures minimales et de précipitations mensuelles. Les différences dans les précipitations ont d'importantes répercussions biologiques car elles peuvent effectivement nuire à la reproduction et l'hivernage de l'espèce étudiée. Le réchauffement semble donc bien intervenir dans le déclin des populations à long terme, même si le tétras souffre du changement climatique en plus des atteintes anthropiques à son environnement et à sa tranquillité. Pour pallier aux défauts du climat, le gestionnaire prendra des décisions qui améliorent à tous points de vue la qualité, la capacité d'accueil et la tranquillité de l'habitat préféré de cet oiseau afin de favoriser sa conservation à court terme. [less ▲]

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See detailThe mazer physics
Bastin, Thierry ULg

Conference (2003)

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See detailA new method for reconstruction of the vertical electron density distribution in the upper ionosphere and plasmasphere
Stankov, Stanimir; Jakowski, Norbert; Muhtarov, Plamen et al

in Journal of Geophysical Research. Space Physics (2003), 108(A51164), 1164

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See detailMagnetic fabrics in the Holum granite (Vest-Agder, southernmost Norway): implications for the late evolution of the Sveconorwegian (Grenvillian) orogen of SW Scandinavia
Bolle, Olivier ULg; Diot, Hervé; Trindade, Ricardo I.F.

in Precambrian Research (2003), 121(3-4), 221-249

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See detailEthique de la régulation, régulation par l'éthique
Geuens, Geoffrey ULg

in Réseaux : Revue Interdisciplinaire de Philosophie Morale et Politique (2003), 97-98-99 ("Éthique et pouvoir des médias")

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See detailXylobios: patterns, roles and determinants of saproxylic diversity in Belgian deciduous forests
Fayt, Philippe; Branquart, Etienne; Dufrêne, Marc ULg et al

in McManus, M.L.; Liebhold, A.M. (Eds.) Proceedings: Ecology, Survey and Management of Forest Insects (2003)

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See detailPrévenir le mal
Strivay, Lucienne ULg

in Lempereur, Françoise; Neuberg, André (Eds.) Guérisseurs d'hier et d'aujourd'hui (2003)

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See detailLa transformation et l'utilisation du bois de peuplier
Leclercq, André; Jourez, Benoît ULg

in Le Peuplier en Wallonie (2003)

The poplar wood has been largely used (frame – carpentry packing – paper pulp – sabot manufacture – furniture – rotary peeling for panels and packaging). Some uses of the past were progressively abandoned ... [more ▼]

The poplar wood has been largely used (frame – carpentry packing – paper pulp – sabot manufacture – furniture – rotary peeling for panels and packaging). Some uses of the past were progressively abandoned for tropical species or softwood. But the poplar is now largely used for the rotary peeling process, where its characteristics are appropriated and appreciated. The products not suitable for rotary peeling are used for packaging and ships for panel industry. In the past inside the important wooded areas was never considered as an valuable species while it was used in areas of small forests. Indeed for products with little added value the transportation costs become paramount and in such a case the production of poplars outside large forests become an advantage. A better knowledge of its capabilities during the various stages of its transformation and of its behaviour under various treatments has made it possible to look for new markets so as to enlarge the possibility of use. [less ▲]

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See detailApproche expérimentale des comportements d'anti-prédation chez le tilapia du Nil (Oreochromis niloticus): détection and évaluation des risques de prédation par les juvéniles
Delcourt, Johann ULg

Master of advanced studies dissertation (2003)

Les juvéniles de tilapia du Nil, issus de génération successives élevées en pisciculture depuis 70 ans, sont toujours capables de reconnaitre une menace prédatrice. Ils s'avèrent capables d'adapter leurs ... [more ▼]

Les juvéniles de tilapia du Nil, issus de génération successives élevées en pisciculture depuis 70 ans, sont toujours capables de reconnaitre une menace prédatrice. Ils s'avèrent capables d'adapter leurs comportements face à différents niveau de risques de prédations (absence de prédateur, prédateur passif, prédateur actif). Les jeunes adoptent des comportements d'inspection de type "tit-for-tat" lorsque le prédateur est actif. Les effets de l'alimentation et de la taille du banc sont explorés. [less ▲]

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See detailRooting blockage in the tobacco rac mutant occurs at the initiation phase, and induces diversion to xylem differentiation
Faivre-Rampant, Odile; D'Angeli, S.; Falasca, G. et al

in Plant Biosystems (2003), 137(2), 163-174

The rac mutant of Nicotiana tabacum L. cv. Xanthii is impaired in adventitious root formation. The objective of the present study was to determine whether or not the root induction phase occurs in the rac ... [more ▼]

The rac mutant of Nicotiana tabacum L. cv. Xanthii is impaired in adventitious root formation. The objective of the present study was to determine whether or not the root induction phase occurs in the rac mutant, and if so, to determine what causes the induced cells to become incapable of organising root primordia. To this end, rac and wild-type shoots were cultured in vitro for 7 days under conditions suitable for obtaining roots in the wild-type (i.e., exposure to 5 muM indole-3-butyric acid for 4 h, and then transfer to hormone-free medium), and then histologically and biochemically analysed during culture. The variations in peroxidase activity, and in cellular levels of auxins and polyamines revealed that the induction phase occurs in rac shoots, although it lasts longer than in the wild-type ones. Furthermore, both auxin and polyamines were consistently higher in rac shoots compared to the wild-type. After induction, auxin and putrescine levels abruptly decreased in the wild-type shoots, whereas they decreased much more slowly in the rac mutant. The histological analysis of the wild-type shoots showed that the abrupt decrease in auxin and polyamine levels were correlated with a normal initiation phase. In fact, wild-type shoots showed cell divisions in the procambium already at day 2, resulting in the formation of root primordia at day 4, and in root emergence between days 5 and 7. In rac shoots, despite the fact that the procambium cells were activated to undergo cell division, the initiation phase was highly perturbed, and the procambial cells developed tracheary elements instead of adventitious roots. The different morphogenic responses of the two genotypes are discussed in the light of the differences in auxin content after the induction phase. [less ▲]

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See detailLe cabotin sublime et les pisse-froid. Sartre, Hugo et la modernité
Denis, Benoît ULg

in Prévost, Maxime; Hamel, Yan (Eds.) Victor Hugo 2003-1802. Images et transfigurations (2003)

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