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See detailQuantifying ASes Multiconnectivity Using Multicast Information
Mérindol, Pascal; Van den Schriek, Virginie; Donnet, Benoît ULg et al

in 9th ACM SIGCOMM Conference on Internet Measurement (2009, November)

Redundant connectivity (or multiconnectivity) between adjacent autonomous systems (ASes) is important for inter-domain traffic engineering and fast recovery in case of failures. However, the redundancy of ... [more ▼]

Redundant connectivity (or multiconnectivity) between adjacent autonomous systems (ASes) is important for inter-domain traffic engineering and fast recovery in case of failures. However, the redundancy of ASes business relationship links has not been quantitatively studied, mainly due to the difficulty of obtaining relevant data. In this paper, we show that the mrinfo multicast monitoring tool can provide useful data about the Internet topology and such redundant links in particular. Our analysis relies on more than four years of daily queries to about ten thousand routers mapped into more than two hundred ASes. We demonstrate that peering links between ASes are frequently redundant. In particular, our analysis shows that more than half of the studied ASes pairs are connected through multiple physical links. We then refine our analysis by considering the different types of ASes and their business relationships. A particular result of our analysis is that at least 75% of the peer-to-peer relationships between adjacent Tier-1 ASes are redundant, i.e., the con- nections between these ASes involve several physical links. Our analysis is conservative, providing so a lower bound, as some links might not be seen by mrinfo due to ISPs filtering policies. [less ▲]

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See detailLa promotion de la santé en Communauté française, une variabilité de pratiques en regard d'un même décret
Absil, Gaëtan ULg; Caillet, Sarah

in Education santé (2009), (250), 8-9

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See detailChoisir son assiette pour que tout le monde soit à la fête
Ozer, Pierre ULg

Article for general public (2009)

En décembre, les chefs d’Etats se réunissent à Copenhague pour tenter de lutter contre le réchauffement climatique. Et en décembre, nous préparons de copieux repas pour les fêtes de fin d’année. Cela peut ... [more ▼]

En décembre, les chefs d’Etats se réunissent à Copenhague pour tenter de lutter contre le réchauffement climatique. Et en décembre, nous préparons de copieux repas pour les fêtes de fin d’année. Cela peut être l’occasion d’aider, à notre échelle, à préserver la planète. [less ▲]

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See detailLa promotion de la santé en Communauté française de Belgique : entre enfermements et ouvertures ?
Absil, Gaëtan ULg

in Education Santé (2009), (250), 16-17

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See detailPrévention, réseaux et parentalité : l'accompagnement global en consultation prénatale
Absil, Gaëtan ULg; Prato, Elise

in Education Santé (2009), (250),

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See detailLa promotion de la santé se décrète-t-elle ?
Absil, Gaëtan ULg; Vandoorne, Chantal ULg

in Education Santé (2009), (250), 5

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See detailComment j'explore... les troubles dystoniques : un guide simple et pratique
JEDIDI, Zayd ULg; Scholtes, Félix ULg; Kaschten, Bruno ULg et al

in Revue Médicale de Liège (2009), 64

La rencontre d'une dystonie, que ce soit en tant que symptôme entrant dans un cadre nosologique plus large ou en tant qu’anomalie isolée, n’est pas exceptionnelle en pratique clinique. La dystonie peut se ... [more ▼]

La rencontre d'une dystonie, que ce soit en tant que symptôme entrant dans un cadre nosologique plus large ou en tant qu’anomalie isolée, n’est pas exceptionnelle en pratique clinique. La dystonie peut se produire à tous âges de la vie. Un diagnostic précis est important afin d’optimiser la prise en charge de ces affections souvent chroniques et invalidantes. Les divers examens complémentaires devront inclure la résonance magnétique nucléaire, incontournable dans le diagnostic et le suivi des patients dystoniques. Nous présentons ici un aperçu des troubles dystoniques les plus fréquents et des solutions thérapeutiques appropriées, ainsi qu’une proposition de classification afin d’en simplifier le diagnostic. [less ▲]

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See detailUne démarche d'autoévaluation d'un programme centré sur l'alimentation
Miermans, Marie-Christine ULg

in Education Santé (2009), (250), 12

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See detailPromotion de la santé, prévention, éducation pour la santé : parle-t-on de la même chose ?
Vandoorne, Chantal ULg

in Education Santé (2009), (250), 6-7

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See detailObservations and asteroseismological analysis of the rapid subdwarf B pulsator EC 09582-1137
Randall, Suzanna K.; Van Grootel, Valérie ULg; Fontaine, Gilles et al

in Astronomy and Astrophysics (2009), 507

We made photometric and spectroscopic observations of the rapidly pulsating subdwarf B star EC 09582-1137 with the aim of determining the target's fundamental structural parameters from asteroseismology ... [more ▼]

We made photometric and spectroscopic observations of the rapidly pulsating subdwarf B star EC 09582-1137 with the aim of determining the target's fundamental structural parameters from asteroseismology. This analysis forms part of a long-term programme geared towards distinguishing between different proposed formation scenarios for hot B subdwarfs on the basis of their internal characteristics. So far, secure asteroseismic solutions have been computed for 9 of these pulsators, and first comparisons with results from evolutionary calculations look promising. The new data comprise 30 h of fast time-series photometry obtained with SUSI2 at the NTT on La Silla, Chile, as well as 1 h of low-resolution spectroscopy gathered with EMMI, also mounted on the NTT. From the photometry we detected 5 independent harmonic oscillations in the 135-170 s period range with amplitudes up to 0.5% of the mean brightness of the star. In addition, we extracted two periodicities interpreted as components of a rotationally split multiplet that indicate a rotation period of the order of 2-5 days. We also recovered the first harmonic of the dominant pulsation, albeit at an amplitude below the imposed 4σ detection threshold. The spectroscopic observations led to the following estimates of the atmospheric parameters of EC 09582-1137: T_eff = 34 806±233 K, log{g} = 5.80±0.04, and log N(He)/N(H) = -1.68±0.06. Using the observed oscillations as input, we searched in model parameter space for unique solutions that present a good fit to the data. Under the assumption that the two dominant observed periodicities correspond to radial or dipole modes, we were able to isolate a well-constrained optimal model that agrees with the atmospheric parameters derived from spectroscopy. The observed oscillations 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 0.57%. Non-adiabatic calculations reveal all theoretical modes in the observed period range to be unstable, an important a posteriori consistency check for the validity of the optimal model. The inferred structural parameters of EC 09582-1137 are T_eff = 34 806 K (from spectroscopy), log{g} = 5.788±0.004, Mast = 0.485±0.011 Msun, log{(M_env/Mast)} = -4.39±0.10, R = 0.147±0.002 Rsun, and L = 28.6±1.7 Lsun. We additionally derive the absolute magnitude MV = 4.44±0.05 and the distance d = 1460±66 pc. [less ▲]

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See detailDoes radiation treatment delay affect survival in glioblastoma
Robe, Pierre ULg; Nguyen-Khac, Minh-Tuan ULg; Lenelle, Jacques ULg et al

in Surgical Neurology (2009), 72(5), 519

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See detailAggressive pituitary adenomas occurring in young patients in a large Polynesian kindred with a germline R271W mutation in the AIP gene.
Jennings, J. E.; Georgitsi, M.; Holdaway, I. et al

in European Journal of Endocrinology (2009), 161(5), 799-804

OBJECTIVE: Mutations in the aryl hydrocarbon receptor-interacting protein (AIP) were recently shown to confer a pituitary adenoma predisposition in patients with familial isolated pituitary adenomas (FIPA ... [more ▼]

OBJECTIVE: Mutations in the aryl hydrocarbon receptor-interacting protein (AIP) were recently shown to confer a pituitary adenoma predisposition in patients with familial isolated pituitary adenomas (FIPA). We report a large Samoan FIPA kindred from Australia/New Zealand with an R271W mutation that was associated with aggressive pituitary tumors. DESIGN AND METHODS: Case series with germline screening of AIP and haplotype analyses among R271W families. RESULTS: This previously unreported kindred consisted of three affected individuals that either presented with or had first symptoms of a pituitary macroadenoma in late childhood or adolescence. The index case, a 15-year-old male with incipient gigantism and his maternal aunt, had somatotropinomas, and the maternal uncle of the index case had a prolactinoma. All tumors were large (15, 40, and 60 mm maximum diameter) and two required transcranial surgery and radiotherapy. All three affected subjects and ten other unaffected relatives were found to be positive for a germline R271W AIP mutation. Comparison of the single nucleotide polymorphism patterns among this family and two previously reported European FIPA families with the same R271W mutation demonstrated no common ancestry. CONCLUSIONS: This kindred exemplifies the aggressive features of pituitary adenomas associated with AIP mutations, while genetic analyses among three R271W FIPA families indicate that R271W represents a mutational hotspot that should be studied further in functional studies. [less ▲]

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See detailL'affranchissement des modèles de sexe comme facteur de meilleure réussite scolaire : résultats de recherche et activités de formation
Gavray, Claire ULg; Manço, Altay; Sensi, Dina

Report (2009)

The research shows that gender stereotypes remain more anchored in the male group, whatever the social origin of the teenagers. Their way of thinking and acting are still characterized by an ... [more ▼]

The research shows that gender stereotypes remain more anchored in the male group, whatever the social origin of the teenagers. Their way of thinking and acting are still characterized by an inferiorisation and a depreciation of ' feminine' world. These trends have a negative influence on their school insertion and performances. This increases the risk of confrontation with the violence, as victims or authors. The girls widely invest school but their chances to get a good autonomy are unevenly distributed between them , according to their social and cultural origins. [less ▲]

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See detailBoussaâda : Une ville touristique confrontée au développement urbain. Apports de la télédétection
Salmon, Marc ULg; Ammiche, Allaoua; Guermit, Ali et al

in Journées d’Animation Scientifique (JAS09) de l’AUF (2009, November)

La région de Boussaâda et son oasis en particulier profitent d'une situation géographique privilégiée ayant tôt permis une sédentarisation malgré le caractère aride du milieu. Ainsi, outre des sites ... [more ▼]

La région de Boussaâda et son oasis en particulier profitent d'une situation géographique privilégiée ayant tôt permis une sédentarisation malgré le caractère aride du milieu. Ainsi, outre des sites géologiques de caractère, on peut recenser de nombreux monuments et sites d'intérêt culturel et historique valorisables du point de vue touristique. Toutefois, la pression conjuguée d'une croissance rapide et importante de la population, d'une mutation du système organisationnel (administratif, juridictionnel et politique) et d'un contexte social particulier ont engendré un ensemble de dégradations qu'il convient de limiter. En conséquence, une première étape dans la prévention a consisté en l'évaluation des menaces anthropiques et naturelles par l'étude conjointe des documents bibliographiques, des observations de terrain et des données cartographiques et particulièrement de télédétection. [less ▲]

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See detailPrédiction de l'érosion ravinante en Algérie : vers une nouvelle approche probabiliste à l'aide de données multisources.
Daoudi, Mohamed; Salmon, Marc ULg; Dewitte, Olivier et al

in Journées d’Animation Scientifique (JAS09) de l’AUF (2009, November)

Pour faire face à la complexité de l'érosion ravinante dans la région tellienne, le présent travail propose l'utilisation d'une approche probabiliste basée sur des données multisources dont les images de ... [more ▼]

Pour faire face à la complexité de l'érosion ravinante dans la région tellienne, le présent travail propose l'utilisation d'une approche probabiliste basée sur des données multisources dont les images de télédétection. Un modèle de régression logistique a été élaboré pour la prédiction du processus de ravinement dans le bassin versant de l'oued Isser. Dans un premier temps, il expose les facteurs contrôlant l'érosion linéaire et dans un deuxième temps, il génère des cartes prédictives des zones propices au ravinement. [less ▲]

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See detailDamage Detection of Mechanical Components Using Null Subspace Analysis
Rutten, Christophe ULg; Loffet, Christophe; Golinval, Jean-Claude ULg

Conference given outside the academic context (2009)

This paper presents two original applications of the Null Subspace Analysis (NSA) method for fault diagnosis in mechanical components. The method is first applied to the case-study of electro-mechanical ... [more ▼]

This paper presents two original applications of the Null Subspace Analysis (NSA) method for fault diagnosis in mechanical components. The method is first applied to the case-study of electro-mechanical devices at the end of the assembly line with the aim of assessing their overall quality. The advantages of the proposed method rely in its rapidity of use and its reliability. At first, a set of five good (i.e. healthy) devices and four damaged devices was considered. The components were instrumented with one triaxial accelerometer on the flank and one monoaxial accelerometer on the top. Based on the NSA method, a mapping of the space [ active components, system order ] up to a system order of 100, was realized in order to select the appropriate order and number of active components. Eventually, thanks to this mapping, the method was able to successfully detect all the faulty components using the signal from only one accelerometer in one direction. The second application is related to the quality assessment of welded joints between stripes in a steel processing plan. Six welded joints with nominal welding parameters and twenty-seven welded joints with out-of-range parameters were realized. Again, the NSA method was able to diagnose successfully the welded joints using a single signal from one accelerometer. [less ▲]

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