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See detailPredatory boreholes in Tournaisian (Lower Carboniferous) spiriferid brachiopods
Mottequin, Bernard ULg; Sevastopulo, George

in Budd, G. E.; Streng, M.; Daley, A. C. (Eds.) et al Programme with abstracts of the 51st Palaeontological Association Annual Meeting (2007, December)

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See detailInternet Topology Discovery: a Survey
Donnet, Benoît ULg; Friedman, Timur

in IEEE Communications Surveys and Tutorials (2007), 9(4), 2-15

Since the beginning of the nineties, the internet has undergone impres- sive growth. This growth can be appreciated in terms of the equipment, such as routers and links, that has been added, as well as in ... [more ▼]

Since the beginning of the nineties, the internet has undergone impres- sive growth. This growth can be appreciated in terms of the equipment, such as routers and links, that has been added, as well as in the numbers of users and the value of commerce that it supports. In parallel to this expansion, over the past decade the networking research community has shown a growing interest in discovering and analyzing the internet topology. Some researchers have developed tools for gathering network topology data while others have tried to understand and model the internet’s properties. These efforts have brought us to a crucial juncture for toplogy measurement infrastructures: while, previously, these were both small (in terms of number of measurement points) and monolithic, we are starting to see the deployment of large-scale distributed systems composed of hundreds or thousands of monitors. As we look forward to this next generation of systems, we take stock of what has been achieved so far. In this survey, we discuss past and current mechanisms for discovering the internet topology at various levels: the IP interface, the router, the AS, and the PoP level. In addition to discovery techniques, we provide insights into some of the well- known properties of the internet topology. [less ▲]

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See detailLa circonscription fédérale : un placebo administré à un malade incurable?
Bouhon, Frédéric ULg

E-print/Working paper (2007)

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See detailIntussen aan de kersttafel...
Ozer, Pierre ULg; Perrin, Dominique ULg

Article for general public (2007)

De afgelopen weken heb ik de reclamefolders van mijn dichtstbijzijnde hypermarkt uitgeplozen om een fijn dineetje samen te stellen. Hierna volgt het resultaat voor acht personen, met tussen haakjes het ... [more ▼]

De afgelopen weken heb ik de reclamefolders van mijn dichtstbijzijnde hypermarkt uitgeplozen om een fijn dineetje samen te stellen. Hierna volgt het resultaat voor acht personen, met tussen haakjes het aantal kilometers dat elk ingrediënt heeft afgelegd om naar België te komen en de hoeveelheid CO2 in kilogram die het transport geproduceerd heeft. Ik heb vooral ingrediënten gekozen die met het vliegtuig worden aangevoerd, want luchttransport produceert gemiddeld zestig keer meer CO2 dan vervoer over zee. [less ▲]

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See detailFolate receptor autoimmunity and cerebral folate deficiency in low-functioning autism with neurological deficits
RAMAEKERS, Vincent ULg; Blau, N.; Sequeira, J. M. et al

in Neuropediatrics (2007), 38(6), 276-281

Reduced folate transport to the CNS was identified in two autism spectrum disorders, i.e., Rett syndrome and infantile low-functioning autism with neurological abnormalities. Twenty-five patients with ... [more ▼]

Reduced folate transport to the CNS was identified in two autism spectrum disorders, i.e., Rett syndrome and infantile low-functioning autism with neurological abnormalities. Twenty-five patients with early-onset low-functioning autism with or without neurological deficits, were evaluated for serum folate, cerebrospinal fluid (CSF) 5-methyltetrahydrofolate (5MTHF), and serum FR autoantibodies of the blocking type to determine the significance of folate receptor (FR) autoantibodies with respect to folate transport across the blood-CSF barrier. In spite of normal serum folate, CSF 5MTHF was low in 23 of 25 patients. The reduced CSF folate in 19 of these 23 patients could be explained by serum FR autoantibodies blocking the folate binding site of the membrane-attached FR on the choroid epithelial cells. Oral folinic acid supplements led to normal CSF 5MTHF and partial or complete clinical recovery after 12 months. Serum FR autoimmunity appears to represent an important factor in the pathogenesis of reduced folate transport to the nervous system among children with early-onset low-functioning autism associated with or without neurological deficits. Early detection of FR autoantibodies may be a key factor in the prevention and therapeutic intervention among this subgroup of patients with autism. © Georg Thieme Verlag KG Stuttgart. [less ▲]

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See detailNoël en famille ou 15 litres de pétrole
Ozer, Pierre ULg; Perrin, Dominique ULg

Article for general public (2007)

La semaine précédant Noël, j’ai décortiqué les publicités de mon hypermarché le plus proche pour préparer le repas familial tant attendu. Et voici ce que j’ai pu concocter pour huit personnes avec, entre ... [more ▼]

La semaine précédant Noël, j’ai décortiqué les publicités de mon hypermarché le plus proche pour préparer le repas familial tant attendu. Et voici ce que j’ai pu concocter pour huit personnes avec, entre parenthèses, les kilomètres parcourus entre le pays de production et la Belgique ainsi que les kilogrammes de CO2 émis uniquement pour le transport aérien intercontinental de ces produits achetés. L’analyse se focalise sur le transport par voie aérienne puisque celui-ci émet, en moyenne, 60 fois plus de CO2 que le transport par voie maritime. [less ▲]

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See detailLégende de la Carte Numérique des Sols de Wallonie - version 2
Bah, Boubacar Billo; Legrain, Xavier ULg; Engels, Patrick ULg et al

Book published by Unité de Science du Sol - GxABT - ULg - 2ème éd. revue et corrigée (2007)

Cette synthèse commente la structure et le contenu de la légende de la Carte Numérique des Sols de Wallonie (CNSW), réalisée dans le cadre du Projet de Cartographie Numérique des Sols de Wallonie (PCNSW).

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See detailEndometrial vessel maturation in women exposed to levonorgestrel-releasing intrauterine system for a short or prolonged period of time
Ravet, Stéphanie ULg; Labied, Soraya ULg; Blacher, Silvia ULg et al

in Human Reproduction (2007), 22(12), 3084-3091

BACKGROUND: Levonorgestrel-releasing intrauterine system (LNG-IUS), although inserted to reduce heavy menstruation, causes irregular early transient bleeding. The objective of the study was to document ... [more ▼]

BACKGROUND: Levonorgestrel-releasing intrauterine system (LNG-IUS), although inserted to reduce heavy menstruation, causes irregular early transient bleeding. The objective of the study was to document quantitative changes in endometrial vessels of short- (< or =3 months) and long-term (> or =12 months) LNG users. The area, density and maturation of endometrial vessels were quantified in 19 endometrial biopsies of women with LNG-IUS and in 10 normally ovulating patients during mid-luteal phase. METHODS: Vessel maturation was evaluated by double immunostaining using anti-von Willebrand factor (endothelial cell marker) and anti-alpha Smooth Muscle Actin (vascular smooth muscle cells) antibodies. Vessel area, number and density were quantified with a novel computer-assisted image analysis system. RESULTS: Endometrium exposed to LNG-IUS for 1-3 months displayed a 11.5-fold increase in small naked vessel number. The partially mature vessel (alphaSMA partially positive) number increased six times. After long-term LNG-IUS treatment, the immature and partially mature vessel number remained four times higher than in the control group. Vessel area and density also increased dramatically in a time-dependent pattern with LNG-IUS use. CONCLUSIONS: Levonorgestrel affects blood vessel number, area, density and maturation in a time-dependent pattern that may explain the early transient increase in breakthrough bleeding with the LNG-IUS. [less ▲]

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See detailL’application du principe de subsidiarité au travers de la réglementation européenne et belge de prévention des accidents industriels majeurs
Hanson, Sophie ULg

in actes du colloque Risques industriels majeurs, sciences humaines et sociales (2007, December)

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See detailL'image du mois. Un syndrome d' Asherman
Desirotte, Gaëlle ULg; Foidart, Jean-Michel ULg; Nisolle, Michelle ULg

in Revue Médicale de Liège (2007), 62(12), 697-8

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See detailDevelopment of Bio-climatic zones in North East India
Singh, Manoj Kumar ULg; Mahapatra, Sadhan; Atreya, S.K.

in Energy & Buildings (2007), 39(12), 1250-1257

This paper represents the very basic work of bio-climatic classification of north-east India into warm and humid, cool and humid and cold and cloudy zones. This classification is extremely useful to the ... [more ▼]

This paper represents the very basic work of bio-climatic classification of north-east India into warm and humid, cool and humid and cold and cloudy zones. This classification is extremely useful to the building design for wide range of objectives such as climate responsive building design, building energy conservation, thermal comfort, out door design conditions, etc. This classification is based on the meteorological data collected over a period of more than 30 years, from Regional Meteorological Centre, Guwahati, India from 30 stations spread all over the region. Psychometric charts are prepared for each bio-climatic zone to assess the potential of solar passive design strategies for residential buildings. [less ▲]

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See detailBulletin de la Société Voltaire n°15
Tilkin, Françoise ULg

E-print/Working paper (2007)

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See detailAlternative methodologies for the evaluation of the EMC-Behaviour of large machines
Catrysse, Johan; Vanhee, Filip; Knockaert, Jos et al

in Revue E tijdschrift (2007), (4), 16-28

On the legal aspect, the new European Directive on ElectroMagnetic Compatibility 2004/108/EC concerns also large machines. The conformity assessment procedure in that case should be clarified and which ... [more ▼]

On the legal aspect, the new European Directive on ElectroMagnetic Compatibility 2004/108/EC concerns also large machines. The conformity assessment procedure in that case should be clarified and which standards should be applied and how. On a technical point of view, the special situation to characterise the EMC behaviour of large machines implies that current procedures are complex and very expensive, and in some cases even not possible. Adapted measuring methodologies and procedures are needed. As a response to this situation and within the European R&D Frameworks, the TEMCA2 project aimed to develop new and adapted methodologies for the assessment of EMC related to this type of industrial large machinery. The present paper describes the legal aspect for large machines and shows the objectives and the results of the European TEMCA2 project. [less ▲]

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See detailObservations and asteroseismic analysis of the rapidly pulsating hot B subdwarf PG 0911+456
Randall, Suzanna K.; Green, Elizabeth M.; Van Grootel, Valérie ULg et al

in Astronomy and Astrophysics (2007), 476

Aims:The principal aim of this project is to determine the structural parameters of the rapidly pulsating subdwarf B star PG 0911+456 from asteroseismology. Our work forms part of an ongoing programme to ... [more ▼]

Aims:The principal aim of this project is to determine the structural parameters of the rapidly pulsating subdwarf B star PG 0911+456 from asteroseismology. Our work forms part of an ongoing programme to constrain the internal characteristics of hot B subdwarfs with the long-term goal of differentiating between the various formation scenarios proposed for these objects. So far, a detailed asteroseismic interpretation has been carried out for 6 such pulsators, with apparent success. First comparisons with evolutionary theory look promising, however it is clear that more targets are needed for meaningful statistics to be derived. Methods: The observational pulsation periods of PG 0911+456 were extracted from rapid time-series photometry using standard Fourier analysis techniques. Supplemented by spectroscopic estimates of the star's mean atmospheric parameters, they were used as a basis for the “forward modelling” approach in asteroseismology. The latter culminates in the identification of one or more “optimal” models that can accurately reproduce the observed period spectrum. This naturally leads to an identification of the oscillations detected in terms of degree ℓ and radial order k, and infers the structural parameters of the target. Results: The high S/N low- and medium resolution spectroscopy obtained led to a refinement of the atmospheric parameters for PG 0911+456, the derived values being T_eff = 31 940 ± 220 K, log g = 5.767 ± 0.029, and log He/H = -2.548 ± 0.058. From the photometry it was possible to extract 7 independent pulsation periods in the 150-200 s range with amplitudes between 0.05 and 0.8% of the star's mean brightness. There was no indication of fine frequency splitting over the 68-day time baseline, suggesting a very slow rotation rate. An asteroseismic search of parameter space identified several models that matched the observed properties of PG 0911+456 well, one of which was isolated as the “optimal” model on the basis of spectroscopic and mode identification considerations. All the observed pulsations are identified with low-order acoustic modes with degree indices ℓ = 0,1,2 and 4, and match the computed periods with a dispersion of only 0.26%, typical of the asteroseismological studies carried out to date for this type of star. The inferred structural parameters of PG 0911+456 are T_eff = 31 940 ± 220 K (from spectroscopy), log {g} = 5.777 ± 0.002, Mast/Msun = 0.39 ± 0.01, log{M_env/Mast} = -4.69 ± 0.07, R/Rsun = 0.133 ± 0.001 and L/Lsun = 16.4 ± 0.8. We also derive the absolute magnitude MV = 4.82 ± 0.04 and a distance d = 930.3 ± 27.4 pc. [less ▲]

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See detailDirective Cadre Eau: Mise en oeuvre du contrôle de surveillance - résultats de la campagne 2006 - district Corse
Boissery, Pierre; Andral, Bruno; Belin, Catherine et al

Report (2007)

Les programmes de surveillance liés à la mise en oeuvre de la DCE sont coordonnés par le Ministère de l’Ecologie et de l’Aménagement durable (MEDAD) et dans chaque bassin hydrographique ce sont les ... [more ▼]

Les programmes de surveillance liés à la mise en oeuvre de la DCE sont coordonnés par le Ministère de l’Ecologie et de l’Aménagement durable (MEDAD) et dans chaque bassin hydrographique ce sont les Agences de l’eau qui, avec l’Etat, prennent en charge l’application, la mise en oeuvre de ces réseaux. Sur la façade méditerranéenne, Ifremer a assuré pour le compte du Schéma Directeur des Données sur l’Eau la maîtrise d’ouvrage de la première campagne du contrôle de surveillance, en coordonnant l’ensemble de l’acquisition des données et de leur synthèse en collaboration avec de nombreux partenaires : Universités, bureaux d’études, structures locales de gestion et services de l’Etat. La mobilisation des différents acteurs autour d’un objectif commun a permis de faire face à la pluridisciplinarité et à la complexité des aspects logistiques de ce programme. Les résultats de cette première campagne du contrôle de surveillance (2006) permettent d’ores et déjà d’avoir une bonne vision d’ensemble de la qualité des eaux littorales à l’échelle du district. Ils confortent les évaluations faites « à dire d’expert » lors de l’état des lieux du district avec des informations nouvelles concernant plus particulièrement la biologie, notamment le benthos de substrat meuble. En eaux côtières, les eaux sont de bonne qualité. En eau de transition, essentiellement lagunaires, il existe une plus grande hétérogénéité des résultats avec des paramètres déclassant relevant plutôt de la biologie, mais sur un nombre important d’indicateurs. [less ▲]

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See detailImplementation and Preliminary Evaluation of an ISP-Driven Informed Path Selection
Saucez, Damien; Donnet, Benoît ULg; Bonaventure, Olivier

in ACM CoNEXT conference (2007, December)

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