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See detailElectromagnetic properties for arbitrary spin particles: Natural electromagnetic moments from light-cone arguments
Lorce, Cédric ULg

in Physical Review. D, Particles, Fields, Gravitation, and Cosmology (2009), D79

We revisit the old-standing problem of the electromagnetic interaction for particles of arbitrary spin. Based on the assumption that light-cone helicity at tree level and $Q^2=0$ should be conserved ... [more ▼]

We revisit the old-standing problem of the electromagnetic interaction for particles of arbitrary spin. Based on the assumption that light-cone helicity at tree level and $Q^2=0$ should be conserved nontrivially by the electromagnetic interaction, we are able to derive all the natural electromagnetic moments for a pointlike particle of any spin. We provide here a transparent decomposition of the electromagnetic current in terms of covariant vertex functions. We also define in a general way the electromagnetic multipole form factors, and show their relation with the electromagnetic moments and covariant vertex functions. The light-cone helicity conservation argument determines uniquely the values of all electromagnetic moments, which we refer to as the ‘‘natural’’ ones. These specific values are in accordance with the standard model, and the prediction of universal g=2 gyromagnetic factor is naturally recovered. We provide a very simple and compact formula for these natural moments. As an application of our results, we generalize the discussion of quark transverse charge densities to particles with arbitrary spin, giving more physical support to the light-cone helicity conservation argument. [less ▲]

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See detailAssociation between asthma control and bronchial hyperresponsiveness and airways inflammation: a cross-sectional study in daily practice.
Quaedvlieg, Valérie ULg; Sele, Jocelyne ULg; Henket, Monique ULg et al

in Clinical & Experimental Allergy : Journal of the British Society for Allergy & Clinical Immunology (2009), 39

Summary Background The primary end-point in the management of asthma is to obtain optimal control. The aim of this study was to assess the relationships between the markers of airway inflammation (sputum ... [more ▼]

Summary Background The primary end-point in the management of asthma is to obtain optimal control. The aim of this study was to assess the relationships between the markers of airway inflammation (sputum eosinophilia and exhaled nitric oxide), bronchial hyperresponsiveness (BHR) and asthma control. Methods One hundred and thirty-four patients were recruited from our asthma clinic between January 2004 and September 2005 [mean age: 42 years, mean forced expiratory volume in 1 s (FEV(1)): 86% predicted]. Eighty-six of them were treated by inhaled corticosteroids, 99 were atopic and 23 were current smokers. They all underwent detailed investigations including fractional-exhaled nitric oxide (FE(NO)) measurement, sputum induction and methacholine challenge when FEV(1) was >70% predicted, and filled in a validated asthma control questionnaire (ACQ6 Juniper). Results When dividing patients into the three groups according to their level of asthma control determined by ACQ [well-controlled asthma (ACQ score </=0.75), borderline (0.75<ACQ score <1.5) and uncontrolled asthma (ACQ score >/=1.5)], it appeared that uncontrolled asthmatics had a greater BHR to methacholine and sputum eosinophilia than controlled asthma (P<0.05, P<0.001, respectively). By contrast, we failed to show significant differences in the FE(NO) levels between the groups. With receiver-operating characteristic curves for differentiating uncontrolled (ACQ>/=1.5) from controlled and borderline (ACQ<1.5) asthma, sputum eosinophilia and methacholine responsiveness were found to be more accurate than FE(NO) (area under the curve: 0.72, 0.72 and 0.59, respectively). Conclusion In a broad spectrum of asthmatics encountered in clinical practice, sputum eosinophilia and methacholine bronchial hyperresponsiveness, but not FE(NO), are associated with uncontrolled asthma. [less ▲]

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See detailSynthèse 2009: forger l'avenir
Malaise, Michel ULg

in Revue Médicale de Liège (2009), 64(Spec No), 1

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See detailLes dernières girafes d'Afrique de l'Ouest
Vermeulen, Cédric ULg

in Parcs & Réserves (2009), 64(2), 14-16

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See detailIdentifier les structures locales de décision
Vermeulen, Cédric ULg

in Triplet, Patrick (Ed.) Manuel de gestion des aires protégées d'afrique de L'ouest (2009)

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See detailImmobilier. L'Asie, la bulle et la mondialisation
Halleux, Jean-Marie ULg

in Belgeo (2009), 1

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See detailCentre de Ressources Autisme Liège
Philippe, Paule ULg; Jacques, Jessica ULg

Poster (2009)

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See detailLung interstitial macrophages alter dendritic cell functions to prevent airway allergy in mice
Bedoret, Denis ULg; Wallemacq, Hugues ULg; Marichal, Thomas ULg et al

in Journal of Clinical Investigation (2009), 119(12), 3723-38

The respiratory tract is continuously exposed to both innocuous airborne antigens and immunostimulatory molecules of microbial origin, such as LPS. At low concentrations, airborne LPS can induce a lung DC ... [more ▼]

The respiratory tract is continuously exposed to both innocuous airborne antigens and immunostimulatory molecules of microbial origin, such as LPS. At low concentrations, airborne LPS can induce a lung DC-driven Th2 cell response to harmless inhaled antigens, thereby promoting allergic asthma. However, only a small fraction of people exposed to environmental LPS develop allergic asthma. What prevents most people from mounting a lung DC-driven Th2 response upon exposure to LPS is not understood. Here we have shown that lung interstitial macrophages (IMs), a cell population with no previously described in vivo function, prevent induction of a Th2 response in mice challenged with LPS and an experimental harmless airborne antigen. IMs, but not alveolar macrophages, were found to produce high levels of IL-10 and to inhibit LPS-induced maturation and migration of DCs loaded with the experimental harmless airborne antigen in an IL-10-dependent manner. We further demonstrated that specific in vivo elimination of IMs led to overt asthmatic reactions to innocuous airborne antigens inhaled with low doses of LPS. This study has revealed a crucial role for IMs in maintaining immune homeostasis in the respiratory tract and provides an explanation for the paradox that although airborne LPS has the ability to promote the induction of Th2 responses by lung DCs, it does not provoke airway allergy under normal conditions. [less ▲]

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See detailBelgian beekeeping situation and the symptomatology as discriminatory tools
Nguyen, Bach Kim ULg; Mignon, Jacques ULg; Haubruge, Eric ULg

in Proceedings of the 4th Coloss Conference - Prevention of honey bee losses. COLOSS. Zagreb 3-4 March. abstract book p.8 (2009)

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See detailRetrieving episodic memories when recognizing familiar faces and names.
Barsics, Catherine ULg; Brédart, Serge ULg

in Proceedings of the 31st Annual Conference of the Cognitive Science Society. Austin, TX: Cognitive Science Society. (2009)

This study was aimed at investigating whether the recognition of familiar faces is more likely to be associated with an experience of Remembering than the recognition of familiar names. Using the Remember ... [more ▼]

This study was aimed at investigating whether the recognition of familiar faces is more likely to be associated with an experience of Remembering than the recognition of familiar names. Using the Remember/Know paradigm the proportions of episodic memories recalled following the recognition of famous faces and names (Conditions) were assessed. Presented faces and names were previously judged by an independent group of participants as eliciting an equivalent level of familiarity. Nevertheless significant differences between the two conditions appeared in hit and false alarm rates. However, present results showed no significant difference in the recollection of personal memories (Remember responses conditionalized on the hits), following familiar faces compared with familiar names recognition. This finding contrasts with recent accounts assuming that faces are more prone to yield episodic memories than other cues to person identity. These results and their implications for current Interactive Activation and Competition person recognition models are discussed. [less ▲]

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See detailVOC and ozone fluxes from a pine forest in the north of Belgium
Eerdekens, Guenther; Gielen, Bart; Neirynck, J. et al

Poster (2009)

Plants release large amounts of carbon as Volatile Organic Compounds (VOCs) into the atmosphere. These VOCs play an important role in the chemistry of the troposphere as they can be involved in the ... [more ▼]

Plants release large amounts of carbon as Volatile Organic Compounds (VOCs) into the atmosphere. These VOCs play an important role in the chemistry of the troposphere as they can be involved in the mechanisms of ozone and aerosol formation. The key mechanisms underneath biogenic VOC emissions are still not well understood, leading to large uncertainties in BVOC inventories on global and regional scales. Measurements of VOCs, ozone and micro-meteorology are conducted at the ‘De inslag’, a 80-year old mixed pine–oak forest located in the Campine region near Antwerp, Belgium. The forest site is a level-II plot of the European Programme of Intensive Monitoring Forest Ecosystems and is part of the Carboeuro and Nitroeurope-flux research network. The site is equipped with a flux tower that reaches above the 23m canopy. A Proton Transfer Reaction Mass Spectrometer and a Fast Ozone analyser allow determining VOC and ozone fluxes by Eddy Covariance. An analytic footprint model is used to exclude non-forest fluxes. In this study, we will test the accuracy of this footprint model with anthropogenic tracers (benzene and toluene). [less ▲]

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See detailPerformance-based financing for better quality of services in Rwandan health centres: 3-year experience.
Rusa, Louis; Ngirabega, Jean De Dieu; Janssen, Willy et al

in Tropical medicine & international health : TM & IH (2009), 14(7), 830-7

In 2005, the Ministry of Health in Rwanda, with the support of the Belgian Technical Cooperation, launched a strategy of performance-based financing (PBF) in a group of 74 health centres (HCs), covering 2 ... [more ▼]

In 2005, the Ministry of Health in Rwanda, with the support of the Belgian Technical Cooperation, launched a strategy of performance-based financing (PBF) in a group of 74 health centres (HCs), covering 2-m inhabitants. In 2006, PBF was extended to an additional group of 85 HCs, thus reaching 3.8-m inhabitants. This study evaluates the effect of PBF on HC performance from 2005 to 2007. Composite indicators for measuring quantity and quality of services were developed and evaluated through monthly formative supervisions by qualified and well-trained district supervisors. The strategy was based on a fixed fee per quality-approved service. The entire budget spent on the implementation of PBF amounted to $0.25/cap/year, of which $0.20/cap/year for subsidies and an estimated $0.05/cap/year for administration, supervision and training. A positive effect on utilization rates was only seen for activities that were previously less well organized; in this case, growth monitoring services and institutional deliveries. The quality of services, defined as the compliance rate with national and international norms, rose considerably for all services in both groups. A sustained level of quality between 80% and 95% was reached within 18 months in the first group. A similar result was reached in the second group in 8 months. [less ▲]

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See detailLes tribulations du Grand Bâtard Antoine de Bourgogne en Italie (1475)
Marchandisse, Alain ULg; Masson, Christophe ULg

in Publication du Centre Européen d'Etudes Bourguignonnes (2009), XLIX

During his Italian journey, which aimed at confirming to Ferrante of Aragon, king of Naples, his elevation to the title of knight of the Golden Fleece, the Bastard Antoine multiplied the visits, the ... [more ▼]

During his Italian journey, which aimed at confirming to Ferrante of Aragon, king of Naples, his elevation to the title of knight of the Golden Fleece, the Bastard Antoine multiplied the visits, the contacts, in Savoy, in Milan twice, in Naples, in the papal court, in Florence, in Venice and in Ferrare. He revealed himself a very pleasant person everywhere he stayed and, in return, was welcomed with the greatest consideration. Whatever may have been, in the name of his brother, the diplomatic relations struck up by the Bastard with the Italian sovereigns, and whatever design they had, either creating an irrepressible strike force against France, or stirring up the most stunning of coalitions against its king by the conclusion of a most politically profitable marital union or by the gift of the Golden Fleece, even if Antoine was able to recruit a few soldiers and weapons, since they took place while the siege of Neuss was dragging on miserably, all these attempts remained in vain in fine. In 1482, the Estates of Burgundy fell to a child and Marie de Bourgogne left behind her a political situation as delicate as the one who prevailed before Sixte IV offered Antoine, by legitimizing him, the dynastic capacity to reign. [less ▲]

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See detailEfficacite des relais communautaires dans le denombrement et la determination des populations vulnerables dans un contexte de malnutrition endemique et de conflit arme: cas d'un district sanitaire en RD Congo.
Bisimwa, B. G.; Mambo, M. T.; Mitangala, N. P. et al

in Sante (Montrouge, France) (2009), 19(2), 81-6

Objectif : Evaluer la capacité des relais communautaires opérant dans le domaine de la nutrition à contribuer au dénombrement de la population de leurs villages respectifs sous la coordination du district ... [more ▼]

Objectif : Evaluer la capacité des relais communautaires opérant dans le domaine de la nutrition à contribuer au dénombrement de la population de leurs villages respectifs sous la coordination du district sanitaire. Méthodologie : Une étude quasi expérimentale, consistant à organiser les relais communautaires en comités villageois de nutrition et à les responsabiliser dans le dénombrement de la population de leurs villages respectifs, a été mise sur pied dans un district sanitaire rural du Kivu (RD Congo). L’étude a été réalisée de mars à avril 2003 dans une situation de conflit armé. La collecte des données de la population a été assuée par les relais communautaires. Les médianes (minimum et maximum) des proportions observées par catégories d’âge ont été présentées. Résultats : Les relais ont été capables de faire un dénombrement de la population avec des résultats fiables. Les proportions de la population par catégorie d’âge observées se sont révélées similaires à celles du modèle national issu d’une enquête réalisée par des experts. Pour les relais communautaires, un pourcentage médian de 22,2 % (6,2-100 %) des ménages par village a été considéré comme vulnérables dans le contexte de l’Est de la RD Congo, nécessitant par conséquent une aide extérieure. Conclusion : Les relais communautaires peuvent contribuer à la récolte de données démographiques fiables pouvant permettre de planifier des programmes de santé publique, et le suivi de l’évolution démographique même dans une situation d’instabilité et de conflit armé. [less ▲]

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See detailNatural expression technology to identify bioactive compounds of medical relevance
Craig, Matthias ULg

Diverse speeche and writing (2009)

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See detailRencontrer, avec Donna Haraway un animal
Despret, Vinciane ULg

in Critique (2009), 747-748(8-9), 747-759

When Species Meet, de Donna Haraway, est un livre qui se veut fidèle à ce qu’il nous propose, à ce qu’il nous demande, à ce qu’il instruit dans la pluralité des significations qu’on peut donner à ce terme ... [more ▼]

When Species Meet, de Donna Haraway, est un livre qui se veut fidèle à ce qu’il nous propose, à ce qu’il nous demande, à ce qu’il instruit dans la pluralité des significations qu’on peut donner à ce terme : penser, faire exister, agir, et faire agir ce dont il parle, les rencontres entre espèces. Il n’y a rien d’innocent non plus dans cette relation entre espèces qui brouille les catégories ; il faut y voir la chance de « devenir ensemble », « avec quelque grâce ». [less ▲]

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See detailIntroduction à l'utilisation du logiciel Statistica
Donneau, Anne-Françoise ULg

Learning material (2009)

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See detailRisk assessment of laboratories involving the manipulation of unconventional agents causing TSE
Leunda-Casi, A.; Pauwels, K.; Herman, Philippe et al

Report (2009)

The present document aims at summarizing the biosafety recommendations and the containment level required for laboratories where animal and human tissues potentially contaminated by a TSE (Transmissible ... [more ▼]

The present document aims at summarizing the biosafety recommendations and the containment level required for laboratories where animal and human tissues potentially contaminated by a TSE (Transmissible Spongiform Encephalitis) causing agent are manipulated. A particular attention will be paid to decontamination procedures, as the prion protein1 is remarkably resistant to conventional inactivation methods and may stay infectious for long periods of time. We will discuss large surface decontamination procedures of facilities handling TSE causing agents. This is of specific concern for laboratories that have been manipulating TSE causing agents, sometimes for years, but wish today dedicate the facilities to another activity. [less ▲]

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