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See detailCharon's Size And Orbit From Double Stellar Occultations
Sicardy, Bruno; Braga-Ribas, F.; Widemann, T. et al

in AAS/Division for Planetary Sciences Meeting Abstracts (2012, October 01)

Stellar occultations of a same star by both Pluto and Charon (double events) yield instantaneous relative positions of the two bodies projected in the plane of the sky, at 10km-level accuracy. Assuming a ... [more ▼]

Stellar occultations of a same star by both Pluto and Charon (double events) yield instantaneous relative positions of the two bodies projected in the plane of the sky, at 10km-level accuracy. Assuming a given pole orientation for Charon's orbit, double events provide the satellite plutocentric distance r at a given orbital longitude L (counted from the ascending node on J2000 mean equator), and finally, constraints on its orbit. A double event observed on 22 June 2008 provides r=19,564+/-14 km at L=153.483+/-0.071 deg. (Sicardy et al. 2011), while another double event observed on 4 June 2011 yields: r=19,586+/-15 km at L = 343.211+/-0.072 deg. (all error bars at 1-sigma level). These two positions are consistent with a circular orbit for Charon, with a semi-major axis of a=19,575+\-10 km. This can be compared to the circular orbit found by Buie et al. (2012), based on Hubble Space Telescope data, with a=19,573+/-2 km. The 4 June 2011 stellar occultation provides 3 chords across Charon, from which a radius of Rc= 602.4+/-1.6 km is derived. This value can be compared to that obtained from the 11 July 2005 occultation: Rc= 606.0+/-1.5 km (Person et al. 2006) and Rc= 603.6+/-1.4 km (Sicardy et al. 2006). A third double event, observed on 23 June 2011 is under ongoing analysis, and will be presented. Buie et al. (2012), AJ 144, 15-34 (2012) Person et al, AJ 132, 1575-1580 (2006) Sicardy et al., Nature 439, 52-54 (2006) Sicardy et al., AJ 141, 67-83 (2011) B.S. thanks ANR "Beyond Neptune II". L.A.Y. acknowledges support by NASA, New Horizons and National Geographic grants. We thank B. Barnard, M.J. Brucker, J. Daily, C. Erikson, W. Fukunaga, C. Harlinten, C. Livermore, C. Nance, J.R. Regester, L. Salas, P. Tamblyn, R. Westhoff for help in the observations. [less ▲]

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See detailISU team project: Space debris mitigation and removal
Adriaensen, Maarten; Rüdiger, Jehn; Gini, Andrea et al

in Proceedings of the 63rd International Astronautical Congress, IAC (2012, October 01)

The space debris problem has been studied for over 30 years. However, we are still far away from implementing an effective approach to solve the problem. A solution will require several aspects to be ... [more ▼]

The space debris problem has been studied for over 30 years. However, we are still far away from implementing an effective approach to solve the problem. A solution will require several aspects to be addressed: technological development, political and legal frameworks, financial and business aspects, and strategies of raising awareness in the general public and political decision makers. Most spacefaring nations appear to be adopting a 'wait-and-see' approach to the problem. All these aspects are investigated with a multidisciplinary approach. The paper addresses debris mitigation and removal from a technical perspective. Then, political, legal, economic and organisational aspects are described, as well as the awareness issue of the problem. Finally a set of recommendations is offered in the frame of a roadmap comprising short-term (2013-2016), mid-term (2016-2020) and long-term (2020-2053). The recommendations will show how to build-up the technological knowledge, and the economic and legal framework to enable, starting in 2020, a sustainable use of space thanks to the full adherence of mitigation guidelines and the active removal of 10 extra-large debris per year managed by a dedicated international organisation supported by adequate funding. This paper is based on the findings of the International Space University Space Studies Programme (ISU SSP) Team Project: Space Debris Mitigation and Removal. The findings are the result of the research of a team consisting of about 40 professionals and students active in the field of space at the ISU SSP. The Programme was organised by ISU in cooperation with Florida Institute of Technology and NASA Kennedy Space Center. [less ▲]

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See detailLa protéine JNKBP1 agit comme un régulateur négatif de la signalisation de NOD2 en inhibant son processus d’oligomérisation
Lecat, Aurore ULg

Doctoral thesis (2012)

Le récepteur cytoplasmique NOD2 est l'un des membres les mieux caractérisés de la famille des NLRs. NOD2 est capable de détecter le muramyldipeptide (MDP), un composant de la paroi bactérienne, ce qui ... [more ▼]

Le récepteur cytoplasmique NOD2 est l'un des membres les mieux caractérisés de la famille des NLRs. NOD2 est capable de détecter le muramyldipeptide (MDP), un composant de la paroi bactérienne, ce qui induit les différentes cascades de signalisation conduisant à l'activation de NF-κB, des MAPKs et de l'autophagie. Ces voies contribuent à une réponse immunitaire innée et adaptative efficace. La perte de fonction des mutants NOD2 a été associée à une plus grande susceptibilité à la maladie de Crohn, ce qui souligne l'importance physiologique de la régulation de l'activité de NOD2. Nous avons effectué une étude par une approche protéomique pour rechercher de nouveaux régulateurs de NOD2. Nous avons généré un modèle cellulaire pour cette étude, les cellules HEK293GNV. Nous avons identifié plusieurs nouveaux partenaires de NOD2, dont la protéine JNKBP1 (c-Jun N-terminal kinase binding protein 1), une protéine scaffold caractérisée par un domaine WD40 en amino-terminal. Nous avons aussi débuté la caractérisation d’autres protéines appartenant aux complexes NOD2 purifiés comme ROCK2 (Rho activated kinase 2) et HDAC5 (Histone deacetylase 5). Au vu de nos premiers résultats, les protéines ROCKs sembleraient être des activateurs de la voie NOD2. Nous nous sommes principalement consacrés à l’étude de JNKBP1 qui a été identifiée, en 1999, comme un partenaire et un régulateur positif de JNK. Nous avons montré que JNKBP1 via son domaine WD40, se lie à NOD2 suite à l’activation par le MDP. Cette interaction atténuait l'activation de NF-κB dépendante de NOD2, la synthèse de l'IL-8 et l’activité antibactérienne de NOD2. JNKBP1 exerçait son effet répresseur en perturbant l’oligomérisation NOD2 et la phosphorylation de la tyrosine de RIP2 : deux étapes nécessaires à la signalisation en aval. En outre, nous avons montré que JNKBP1 et NOD2 étaient exprimées dans l'épithélium intestinal humain et dans les cellules immunitaires recrutées dans la lamina propria, ce qui suggère que JNKBP1 contribuerait au maintien de l'homéostasie intestinale dépendante de NOD2. [less ▲]

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See detailUsage, Usability, and Utility of 3D City models
Leduc, Thomas; Moreau, Guillaume; Billen, Roland ULg

Book published by edp Sciences (2012)

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See detailLa représentation d'une matrice par biplot
Palm, Rodolphe ULg; Charles, Catherine ULg; Claustriaux, Jean-Jacques ULg

in Notes de Statistique et d'Informatique (2012), (2), 1-22

Matrix factorization by means of singular value decomposition is examined and used to produce a graphical representation of a data matrix called biplot. The link between this biplot and the plots of the ... [more ▼]

Matrix factorization by means of singular value decomposition is examined and used to produce a graphical representation of a data matrix called biplot. The link between this biplot and the plots of the variables and of the individuals usually given in principal component analysis is discussed and applied to an example. [less ▲]

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See detailOptimization of POP analysis in small sample amounts.
L'Homme, Benjamin ULg; Focant, Jean-François ULg

Conference (2012, October)

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See detailLes spécificités de la gestion d'une maison de luxe : vers une modélisation atemporelle de la performance
Riguelle, France ULg; Van Caillie, Didier ULg

in AIREPME (Ed.) Actes du CIFEPME 2012 (2012, October)

Le but ultime de la présente recherche est de modéliser la performance des maisons de luxe de manière transversale (nous décidons de ne pas privilégier l’approche marketing comme une grande partie de la ... [more ▼]

Le but ultime de la présente recherche est de modéliser la performance des maisons de luxe de manière transversale (nous décidons de ne pas privilégier l’approche marketing comme une grande partie de la littérature dédiée à la gestion des métiers du luxe) et atemporelle. Nous proposons d’organiser, au travers du Prime de la Performance (Neely, Adams et Kennerley, 2002), les FCS dont la mise en œuvre permet d’atteindre la performance globale. Cette recherche constitue donc un premier pas vers une modélisation de la performance de la maison de luxe. [less ▲]

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See detailVers une typologie de la réflexivité
Demoulin, Laurent ULg

E-print/Working paper (2012)

Il sera ici question de phénomènes réflexifs qui, au sein d’un texte littéraire, produisent des écarts sensibles et rompent le processus classique de la représentation du réel. Les cas rencontrés sont ... [more ▼]

Il sera ici question de phénomènes réflexifs qui, au sein d’un texte littéraire, produisent des écarts sensibles et rompent le processus classique de la représentation du réel. Les cas rencontrés sont étonnamment divers, tant en ce qui concerne leur structure que les effets produits. C’est pourquoi l’on se propose de les classer en six catégories distinctes : réflexivité autotélique, réflexivité poétique, réflexivité linguistique, réflexivité de l’énonciateur, réflexivité conative et réflexivité référentielle. [less ▲]

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See detailQTL mapping and candidate gene research for the phenolic content of fruits and juices prepared from a cider apple progeny
Verdu, Cindy ULg; Guyot, Sylvain; Childebrand, Nicolas et al

Poster (2012, October)

Polyphenols have favorable antioxidant potential on human health suggesting that their high content in apple is responsible for the beneficial effects of apple consumption. They are also related to the ... [more ▼]

Polyphenols have favorable antioxidant potential on human health suggesting that their high content in apple is responsible for the beneficial effects of apple consumption. They are also related to the quality of ciders as they predominantly account for astringency, bitterness, color and aroma. Five groups of phenolic compounds are described in the apple fruit: flavanols, hydroxycinnamic acids, dihydrochalcones, flavonols and anthocyanins. So far, only two studies have been published on the genetic basis of the phenolic content of dessert apples. As cider apples are commonly described to be much more concentrated in phenolic compounds than dessert varieties, the present study focuses on a cider apple progeny. 32 compounds belonging to the five groups were identified and quantified by HPLC-UV and UHPLC-UV-MS/MS in fruit extracts and juices. 53 QTL controlling phenolic compounds concentration were detected on nine linkage groups (LG) on the integrated linkage map, for all phenolic groups except anthocyanins. QTL clusters located on LG1, 12, 14, 15 and 17 were stable across the year or the studied material. QTL detected on LG1, 14 and 17 for quercitrin, p-coumaroylquinic acid, rutin and chlorogenic acid confirmed results of previous studies. However, no significant QTL was obtained on the LG16 where a major locus for flavanols was previously located. With the two previous studies, this study shows the diversity of genomic regions controlling traits of interest in apple. [less ▲]

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See detailNécessité de nouveaux critères de remboursement pour traiter l'ostéoporose en Belgique
Bruyère, Olivier ULg; Bergmann, Pierre; Body, Jean-Jacques et al

in Ortho-Rhumato (2012), 10(5), 3

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See detailL’affaire du voile en Belgique : la vision médiatique de la femme arabo-musulmane réduite à son voile
Luceno Moreno, Marta ULg

Conference (2012, October)

Cela fait maintenant plus de 20 ans que l’affaire du voile a éclaté en Belgique pour la première fois, contaminée par le débat public ouvert en France après l’exclusion du lycée de Creil de trois jeunes ... [more ▼]

Cela fait maintenant plus de 20 ans que l’affaire du voile a éclaté en Belgique pour la première fois, contaminée par le débat public ouvert en France après l’exclusion du lycée de Creil de trois jeunes qui portaient le hijab. Comme en France, depuis 1989 la question du hijab apparaît et disparaît de la scène médiatique belge par intermittence. À la différence de la France, qui en 2004 se penche sur la question afin de trouver une solution juridique fermant définitivement la controverse, la question du hijab à l’école va rester perpétuellement dans le débat belge par manque de solutions politiques. Toutefois, si dans un premier temps la question du hijab se posait uniquement dans les écoles, à partir de 2004 le débat s'élargit et concerne peu à peu les administrations publiques, les salles de justice ou le Parlement, avant d’occuper la totalité de l’espace public avec la question de la burqa. [less ▲]

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See detailIntroduction générale : les organisations régionales dans les relations internationales
Santander, Sébastian ULg

in Santander, Sébastian (Ed.) Relations internationales et régionalisme. Entre dynamiques internes et projections mondiales (2012)

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See detailAllelic heterogeneity of Crooked Tail Syndrome: result of balancing selection?
Sartelet, Arnaud ULg; Klingbeil, Pamela; Franklin, Chris et al

in Animal Genetics (2012), 43(5), 604-607

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See detailCultiver d’autres expertises sur les sciences et les technologies
Thoreau, François ULg

in Revue Nouvelle (2012), 10

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See detailTHE POTENTIAL USE OF NEAR-INFRARED SPECTROSCOPY FOR THE QUALITY ASSESSMENT OF EGGS AND EGG PRODUCTS
GALIŞ, Anca; Dale, Laura ULg; Boudry, Christelle ULg et al

in Scientific Works. C Series. Veterinary Medicine (2012), LVIII(3), 294-307

In a context of high productivity, eggs’ quality assessment is necessary for enhanced safety and quality assurance towards the consumers and feedback for producers. The quality assessment of eggs and egg ... [more ▼]

In a context of high productivity, eggs’ quality assessment is necessary for enhanced safety and quality assurance towards the consumers and feedback for producers. The quality assessment of eggs and egg products is performed using destructive and time-consuming methods, therefore the use of rapid tools becomes mandatory, especially in the case of a high production rate. Near Infrared (NIR) spectroscopy is considered a very reliable and rapid technique with large use in food industry. At the farm level, NIR spectroscopy technique would be an interesting tool to determine the chemical and physical properties of eggs, eggshell and internal quality and, moreover, this information may help the layer farm manager when a problem occurs in the flock. Its application in the egg industry is aimed at the quality changes in eggs during storage and quality assessment of the egg products, through the compositional analysis. It is possible and in some cases successful the prediction and/or determination of different parameters such as: protein, total lipid and total solids content (for liquid egg products), polyunsaturated fatty acids (for freeze-dried egg yolk), moisture, fat and protein content (for spray-dried whole eggs). In addition, for the white colored shell eggs, the detection of blood and meat spots is also successful. Further studies with NIR and near infrared hyper spectral imaging system (NIR-HSI) are needed in this direction, as the results obtained until now are very promising for the development of a rapid tool for quality assessment of eggs and egg products. [less ▲]

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See detailStratégie d’exploration neurophysiologique de la myasthénie
WANG, François-Charles ULg

in Lettre du Neurologue (La) : le Courrier du Spécialiste (2012), XVI(8),

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