References of "2006"
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See detailMorphological and molecular characterization of planktonic cyanobacteria from Belgium and Luxembourg
Willame, R.; Boutte, C.; Grubisic, Stana ULg et al

in Journal of Phycology (2006), 42(6), 1312-1332

For the first time in Belgium and Luxembourg, the diversity and taxonomy of 95 cyanobacterial strains isolated from freshwater blooms were assessed by the comparison of phenotypes and partial 16S rRNA ... [more ▼]

For the first time in Belgium and Luxembourg, the diversity and taxonomy of 95 cyanobacterial strains isolated from freshwater blooms were assessed by the comparison of phenotypes and partial 16S rRNA gene sequences. The results showed the high diversity of nanoplanktonic, picoplanktonic, and benthic-periphytic cyanobacteria accompanying the main bloom-forming taxa. Indeed, besides 15 morphotypes of bloom-forming taxa, seven non-bloom-forming planktonic morphotypes and 11 morphotypes from benthic-periphytic taxa were isolated in culture from the plankton samples of 35 water bodies. The bloom-forming strains belonged to the genera Microcystis, Woronichinia, Planktothrix, Anabaena, and Aphanizomenon, whereas the other strains isolated from the same samples were assigned to the nanoplanktonic Aphanocapsa, Aphanothece, Snowella, and Pseudanabaena; to the picoplanktonic Cyanobium; and to the benthic periphytic Geitlerinema, Komvophoron, Leptolyngbya, Lyngbya, Phormidium, Calothrix, Nostoc, and Trichormus. The results supported both the polyphyletism of genera such as Aphanocapsa, Aphanothece, Leptolyngbya, Geitlerinema, Anabaena, and Aphanizomenon as well as the validity of genera such as Microcystis, Planktothrix, and Pseudanabaena with gas vesicles and cells constricted at the cross wall. The results obtained showed the close relationship between Snowella and Woronichinia for which very few sequences exist. The first sequence of Komvophoron appeared poorly related to other available cyanobacterial sequences. Although in a few cases a good agreement existed between phenotypic and genotypic features, there was generally a discrepancy. Strains with identical morphotypes show small differences in the 16S rRNA sequences, which might be related to the different chemical properties of their habitats. The results showed the importance of the polyphasic approach in order to improve the taxonomy of cyanobacteria. [less ▲]

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See detailNiets doet zo goed als slechte tijden
Meesters, Gert ULg

Article for general public (2006)

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See detailL'image du mois. Oesophagite infectieuse majeure mise en evidence par tomodensitometrie thoracique
Henroteaux, A.; Hoyoux, M.; Ghaye, Benoît ULg et al

in Revue Médicale de Liège (2006), 61(12), 793-4

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See detailLa répétibilité des frais de défense en matière pénale, oui mais....
Michiels, Olivier ULg; Monville, Pierre ULg

in Michiels, Olivier; Monville, Pierre (Eds.) Actualités de droit pénal et de procédure pénale (2006)

L'article envisage la question de la répétibilité des honoraires et frais d'avocat en procédure pénale, à la suite des arrêts prononcés par la Cour de cassation le 2 septembre 2004 et par la Cour ... [more ▼]

L'article envisage la question de la répétibilité des honoraires et frais d'avocat en procédure pénale, à la suite des arrêts prononcés par la Cour de cassation le 2 septembre 2004 et par la Cour constitutionnelle le 19 avril 2006. [less ▲]

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See detailPredictable disruption tolerant networks and delivery guarantees
François, Jean-Marc; Leduc, Guy ULg

Report (2006)

This article studies disruption tolerant networks (DTNs) where each node knows the probabilistic distribution of contacts with other nodes. It proposes a framework that allows one to formalize the ... [more ▼]

This article studies disruption tolerant networks (DTNs) where each node knows the probabilistic distribution of contacts with other nodes. It proposes a framework that allows one to formalize the behaviour of such a network. It generalizes extreme cases that have been studied before where (a) either nodes only know their contact frequency with each other or (b) they have a perfect knowledge of who meets who and when. This paper then gives an example of how this framework can be used; it shows how one can find a packet forwarding algorithm optimized to meet the 'delay/bandwidth consumption' trade-off: packets are duplicated so as to (statistically) guarantee a given delay or delivery probability, but not too much so as to reduce the bandwidth, energy, and memory consumption. [less ▲]

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See detailCorrélation entre l'augmentation de la densité minérale osseuse et la réduction du risque fracturaire lors d'un traitement par ranélate de strontium
Bruyère, Olivier ULg; Cormier, C.; Fardellone, Patrice et al

in Revue du Rhumatisme (2006, December), 73

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See detailTreating gliomas with glucocorticoids: from bedside to bench
Piette, Caroline ULg; Munaut, Carine ULg; Foidart, Jean-Michel ULg et al

in Acta Neuropathologica (2006), 112(6), 651-664

Glucocorticoids are used in the treatment of gliomas to decrease tumour-associated oedema and to reduce the risk of acute encephalopathy associated with radiotherapy. However, the mechanisms by which ... [more ▼]

Glucocorticoids are used in the treatment of gliomas to decrease tumour-associated oedema and to reduce the risk of acute encephalopathy associated with radiotherapy. However, the mechanisms by which glucocorticoids work are still largely unknown. In this paper, we survey the experimental and clinical evidence for the effects of glucocorticoids on tumour cell proliferation, apoptosis and sensitivity to chemotherapy, angiogenesis and vascular permeability. We then review current guidelines on the choice of molecule, dose and duration of glucocorticoid treatment for gliomas. [less ▲]

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See detailMapping uncertainty and phylogenetic uncertainty in ancestral character state reconstruction: An example in the moss genus Brachytheciastrum
Vanderpoorten, Alain ULg; Goffinet, B.

in Systematic Biology (2006), 55(6), 957-971

The evolution of species traits along a phylogeny can be examined through an increasing number of possible, but not necessarily complementary, approaches. In this paper, we assess whether deriving ... [more ▼]

The evolution of species traits along a phylogeny can be examined through an increasing number of possible, but not necessarily complementary, approaches. In this paper, we assess whether deriving ancestral states of discrete morphological characters from a model whose parameters are (i) optimized by ML on a most likely tree; (ii) optimized by ML onto each of a Bayesian sample of trees; and (iii) sampled by a MCMC visiting the space of a Bayesian sample of trees affects the reconstruction of ancestral states in the moss genus Brachytheciastrum. In the first two methods, the choice of a single- or two-rate model and of a genetic distance (wherein branch lengths are used to determine the probabilities of change) or speciational (wherein changes are only driven by speciation events) model based upon a likelihood-ratio test strongly depended on the sampled trees. Despite these differences in model selection, reconstructions of ancestral character states were strongly correlated to each others across nodes, often at r > 0.9, for all the characters. The Bayesian approach of ancestral character state reconstruction offers, however, a series of advantages over the single-tree approach or the ML model optimization on a Bayesian sample of trees because it does not involve restricting model parameters prior to reconstructing ancestral states, but rather allows a range of model parameters and ancestral character states to be sampled according to their posterior probabilities. From the distribution of the latter, conclusions on trait evolution can be made in a more satisfactorily way than when a substantial part of the uncertainty of the results is obscured by the focus on a single set of model parameters and associated ancestral states. The reconstructions of ancestral character states in Brachytheciastrum reveal rampant parallel morphological evolution. Most species previously described based on phenetic grounds are thus resolved of polyphyletic origin. Species polyphylly has been increasingly reported among mosses, raising severe reservations regarding current species definition. [less ▲]

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See detailPion physics in the Liege intranuclear cascade model
Aoust, Thierry; Cugnon, Joseph ULg

in Physical Review C (2006), 74(6), 06460717

The implementation of pi production in the Liege intranuclear cascade model (INCL4) for spallation reactions is revisited to alleviate the overestimate of the pi yield. Three modifications are proposed ... [more ▼]

The implementation of pi production in the Liege intranuclear cascade model (INCL4) for spallation reactions is revisited to alleviate the overestimate of the pi yield. Three modifications are proposed for this purpose: a better pi N cross section at high energy, the introduction of a pi average potential, and the modification of the average mass of the Delta resonance. The pi potential is determined from a global fit of a set of data bearing on pi production in proton-induced reactions, on pi-nucleus and absorption cross sections, and on proton production in pi-induced reactions. The resulting pi potential is poorly determined in the nuclear interior and agrees with the phenomenological optical-model potentials in the surface region. With these modifications, the predictions of the INCL4 model concerning pi production cross sections in proton-induced reactions are considerably improved. Predictions of the improved version for pi-nucleus reaction and absorption cross sections and for proton, residue, and fission cross sections in pi-induced reactions are also presented and shown to give reasonably good agreement. Neutron production and some aspects of fission in pi-induced reactions are also investigated and reasonably well predicted. Effects on the modifications on observables, which are not directly linked with pi's, such as the neutron yield and the residue mass and charge spectra in proton-induced reactions are also investigated and shown to improve the description of these observable quantities. Several results on pi production and the relative insentivity to the pi potential in the nuclear interior are shown to be consistent with the fact that most pi's are not produced in early collisions. Importance of rescattering in pi absorption on nuclei is also pointed out. A comparison is made with the so-called Delta-hole model. Residual discrepancies are identified and are interpreted as due to the lack of pi interaction with two nucleons at low energy, to the neglect of quantum motion effects, and to a possible underestimate of rescattering. [less ▲]

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See detailAn empirical line-by-line model for the infrared solar transmittance spectrum from 700 to 5000 cm(-1)
Hase, F.; Demoulin, Philippe ULg; Sauval, A. J. et al

in Journal of Quantitative Spectroscopy & Radiative Transfer (2006), 102(3), 450-463

An empirical line-by-line model for the infrared solar transmittance spectrum is presented. The model can be incorporated into radiative transfer codes to allow fast calculation of all relevant emission ... [more ▼]

An empirical line-by-line model for the infrared solar transmittance spectrum is presented. The model can be incorporated into radiative transfer codes to allow fast calculation of all relevant emission and absorption features in the solar spectrum in the mid-infrared region from 700 to 5000 cm(-1). The transmittance is modelled as a function of the diameter of the field-of-view centered on the solar disk: the line broadening due to solar rotation as well as center-to-limb variations in strength and width are taken into account for stronger lines. Applications of the model presented here are in the fields of terrestrial remote sensing in the mid-infrared spectral region when the sun is used as radiation source or scattered solar radiation contributes to the measured signal and in the fields of atmospheric radiative transfer algorithms which compute the propagation of infrared solar radiation in the terrestrial atmosphere. (c) 2006 Elsevier Ltd. All rights reserved. [less ▲]

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See detailTrou Al'Wesse, Belgium
Miller, Rebecca ULg; Stewart, John

in Mesolithic Miscellany (2006), 18(1), 2

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See detailLe sens de l’orientation. Résistance, ouverture et relégation
Andre, Géraldine ULg

Conference (2006, December)

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See detailFragmentation induced in atmospheric pressure photoionization of peptides
Debois, Delphine ULg; Giuliani, Alexandre; Laprévote, Olivier

in Journal of Mass Spectrometry [=JMS] (2006), 41(12), 1554-1560

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See detailAn introduction to robotics - mechanical aspects
Duysinx, Pierre ULg; Bruls, Olivier ULg; Géradin, Michel ULg

Learning material (2006)

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See detailLectotypification of the Famennian pre-ovule Condrusia rumex Stockmans, 1948
Prestianni, Cyrille ULg; Gerrienne, Philippe ULg

in Review of Palaeobotany and Palynology (2006), 142(3-4), 161-164

Condrusia rumex Stockmans 1948 occurs in several localities of the Belgian Evieux Formation (late Famennian, Upper Devonian). It consists of a hastate organ borne at the tip of "slender, dichotomizing ... [more ▼]

Condrusia rumex Stockmans 1948 occurs in several localities of the Belgian Evieux Formation (late Famennian, Upper Devonian). It consists of a hastate organ borne at the tip of "slender, dichotomizing" axes. Various interpretations have been given to this intriguing structure, ranging from a spore-bearing organ to a fern prothallus but recent investigations consider Condrusia to be an ovulate structures produced by early seed plants. The genus Condrusia includes 3 species: C rumex Stockmans, C. minor Stockmans and C. brevis Petrosjan. C rumex was described by Stockmans in 1948, who provided a diagnosis and illustrations, but failed to designate a holotype. We are currently reinvestigating the genus and we here designate and illustrate a lectotype for the genus and species C. rumex. (c) 2006 Elsevier B.V. All rights reserved. [less ▲]

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See detailFeedback Control of Impact Dynamics: the Bouncing Ball Revisited
Ronsse, Renaud; Sepulchre, Rodolphe ULg

in Proceedings of the 45th IEEE Conference on Decision and Control (2006, December)

We study the the design of a tracking controller for the popular bouncing ball model: the continuous-time actuation of a table is used to control the impacts of the table with a bouncing ball. The ... [more ▼]

We study the the design of a tracking controller for the popular bouncing ball model: the continuous-time actuation of a table is used to control the impacts of the table with a bouncing ball. The proposed control law uses the impact times as the sole feedback information. We show that the acceleration of the table at impact plays no role in the stability analysis but is an important parameter for the robustness of the feedback system to model uncertainty, in particular to the uncertainty on the coefficient of restitution. [less ▲]

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