Last 7 days
Bookmark and Share    
Full Text
Peer Reviewed
See detailLarger and faster: revised properties and a shorter orbital period for the WASP-57 planetary system from a pro-am collaboration
Southworth, John; Mancini, L.; Tregloan-Reed, J. et al

in Monthly Notices of the Royal Astronomical Society (2015), 454

Transits in the WASP-57 planetary system have been found to occur half an hour earlier than expected. We present 10 transit light curves from amateur telescopes, on which this discovery was based, 13 ... [more ▼]

Transits in the WASP-57 planetary system have been found to occur half an hour earlier than expected. We present 10 transit light curves from amateur telescopes, on which this discovery was based, 13 transit light curves from professional facilities which confirm and refine this finding, and high-resolution imaging which show no evidence for nearby companions. We use these data to determine a new and precise orbital ephemeris, and measure the physical properties of the system. Our revised orbital period is 4.5 s shorter than found from the discovery data alone, which explains the early occurrence of the transits. We also find both the star and planet to be larger and less massive than previously thought. The measured mass and radius of the planet are now consistent with theoretical models of gas giants containing no heavy-element core, as expected for the subsolar metallicity of the host star. Two transits were observed simultaneously in four passbands. We use the resulting light curves to measure the planet's radius as a function of wavelength, finding that our data are sufficient in principle but not in practise to constrain its atmospheric properties. We conclude with a discussion of the current and future status of transmission photometry studies for probing the atmospheres of gas-giant transiting planets. [less ▲]

Detailed reference viewed: 13 (1 ULg)
Full Text
Peer Reviewed
See detailPolarization microlensing in the quadruply imaged broad absorption line quasar H1413+117
Hutsemekers, Damien ULg; Sluse, Dominique ULg; Braibant, Lorraine ULg et al

in Astronomy and Astrophysics (2015), 584

We have obtained spectropolarimetric observations of the four images of the gravitationally lensed broad absorption line quasar H1413+117. The polarization of the microlensed image D is significantly ... [more ▼]

We have obtained spectropolarimetric observations of the four images of the gravitationally lensed broad absorption line quasar H1413+117. The polarization of the microlensed image D is significantly different, both in the continuum and in the broad lines, from the polarization of image A, which is essentially unaffected by microlensing. The observations suggest that the continuum is scattered off two regions, spatially separated, and producing roughly perpendicular polarizations. These results are compatible with a model in which the microlensed polarized continuum comes from a compact region located in the equatorial plane close to the accretion disk and the non-microlensed continuum from an extended region located along the polar axis. Based on observations made with ESO Telescopes at the Paranal Observatory (Chile). ESO program ID: 386.B-0337. [less ▲]

Detailed reference viewed: 14 (4 ULg)
Full Text
Peer Reviewed
See detailDevelopment and validation of a short Italian UPPS-P Impulsive Behavior Scale
D'Orta, Isabella; Burnay, Jonathan ULg; Aiello, Daniela et al

in Addictive Behaviors Reports (2015), 2

Impulsivity is a multidimensional construct that plays a prominent role in the development, maintenance, and relapse of addictive disorders. The UPPS-P model of impulsivity, which distinguishes between ... [more ▼]

Impulsivity is a multidimensional construct that plays a prominent role in the development, maintenance, and relapse of addictive disorders. The UPPS-P model of impulsivity, which distinguishes between five impulsivity components (positive urgency, negative urgency, lack of perseverance, lack of premeditation, sensation seeking), has been increasingly investigated during the last decade in relation to addictive and risky behaviors. Unfortunately, it currently lacks a validated scale that allows Italian researchers and clinicians to measure impulsivity based on the UPPS-P model. The current study fills this gap by testing the psychometric properties of a short 20-item Italian scale used to assess the five dimensions of the UPPS-P model in 188 volunteer participants from the community. Confirmatory factor analysis supported a model of five distinct, but interrelated, impulsivity components. The results indicated good internal consistency (Cronbach's α ranges from .73 to .84). Construct validity was evidenced by specific relations with measures of addictive behaviors and depressive symptoms. On the whole, this study demonstrated that the Italian short UPPS-P has good psychometric properties. [less ▲]

Detailed reference viewed: 21 (0 ULg)
Full Text
Peer Reviewed
See detailUpdated checklist of the mosquitoes (Diptera: Culicidae) of Belgium
Boukraa, Slimane ULg; Dekoninck, Wouter; Versteirt, Veerle et al

in Journal of Vector Ecology : Journal of the Society for Vector Ecology (2015), 40(2), 398-407

Most information about the systematics and bioecology of Belgian mosquitoes dates back from before 1950, and only scattered information was produced during the last decades. In this paper we review and ... [more ▼]

Most information about the systematics and bioecology of Belgian mosquitoes dates back from before 1950, and only scattered information was produced during the last decades. In this paper we review and update the list of mosquito species recorded in Belgium, from first report (1908) to 2015. Six genera and 31 species were recorded so far, including 28 autochthonous species and three invasive alien species recently recorded in Belgium: Aedes albopictus (Skuse 1894), Ae. japonicus japonicus (Theobald 1901), and Ae. koreicus (Edwards 1917). The six genera are Anopheles (five species), Aedes (sixteen species), Coquillettidia (one species), Culex (four species), Culiseta (four species), and Orthopodomyia (one species). [less ▲]

Detailed reference viewed: 15 (3 ULg)
Full Text
Peer Reviewed
See detailAgriculture et environnement : genèse des relations
Habran, Maxime ULg

in Revue de l'Union européenne (2015), (593), 604-617

Les négociations portant sur la réforme de la politique agricole commune (PAC) auraient dû mettre la politique de protection de l’environnement sur le devant de la scène. Au lieu de cela, la PAC s’est vu ... [more ▼]

Les négociations portant sur la réforme de la politique agricole commune (PAC) auraient dû mettre la politique de protection de l’environnement sur le devant de la scène. Au lieu de cela, la PAC s’est vu doter d’un nouveau mécanisme appelé verdissement ou paiement vert destiné à verdir le pilier des soutiens de marché. Ce mécanisme rend opaque la prise en compte de l’environnement et affaiblit la conditionnalité. D’un greening, les négociateurs se sont mis d’accord sur un greenwashing. L’objectif de cette contribution est de montrer la manière dont est intégrée la politique de protection de l’environnement au sein de la politique agricole commune. La notion de conditionnalité environnementale permet de comprendre l’articulation et l’interaction entre ces deux politiques. [less ▲]

Detailed reference viewed: 39 (3 ULg)
Full Text
Peer Reviewed
See detailRevue épidémiologique des tendinopathies les plus fréquentes
Sancerne, Audrey; Kaux, Jean-François ULg

in Journal de Traumatologie du Sport (2015), 32(4), 223-228

Tendinopathies are overused pathologies essentially present among sportsmen as well as workers. They represent 19 % of musculo-skeletaldisorders, more than 30 % the consultations of general and sports ... [more ▼]

Tendinopathies are overused pathologies essentially present among sportsmen as well as workers. They represent 19 % of musculo-skeletaldisorders, more than 30 % the consultations of general and sports medicine on musculoskeletal system. At present, general epidemiology studiesare few. Data will therefore be included for each tendinopathy: rotator cuff tendinopathies, epicondylitis, trochanteric pain syndrome, patellar andcalcaneal tendinopathies and plantar fasciitis. The articles have been searched on the databases PubMed and Pedro. [less ▲]

Detailed reference viewed: 44 (10 ULg)
Full Text
Peer Reviewed
See detailQuantum manifestations of classical nonlinear resonances
Wisniacki, Diego A.; Schlagheck, Peter ULg

in Physical Review. E : Statistical, Nonlinear, and Soft Matter Physics (2015), 92

When an integrable classical system is perturbed, nonlinear resonances are born, grow, and eventually disappear due to chaos. In this paper the quantum manifestations of such a transition are studied in ... [more ▼]

When an integrable classical system is perturbed, nonlinear resonances are born, grow, and eventually disappear due to chaos. In this paper the quantum manifestations of such a transition are studied in the standard map. We show that nonlinear resonances act as a perturbation that break eigenphase degeneracies for unperturbed states with quantum numbers that differ in a multiple of the order of the resonance. We show that the eigenphase splittings are well described by a semiclassical expression based on an integrable approximation of the Hamiltonian in the vicinity of the resonance. The morphology in phase space of these states is also studied. We show that the nonlinear resonance imprints a systematic influence in their localization properties [less ▲]

Detailed reference viewed: 7 (0 ULg)
Full Text
Peer Reviewed
See detailPressure-impulse diagram of a beam developing non-linear membrane action under blast loading
Hamra, Lotfi ULg; Demonceau, Jean-François ULg; Denoël, Vincent ULg

in International Journal of Impact Engineering (2015), 86

The p–I diagram of a frame beam subjected to blast loading is established, including the elastic lateral restraint and inertia offered by the rest of the structure, the development of nonlinear membrane ... [more ▼]

The p–I diagram of a frame beam subjected to blast loading is established, including the elastic lateral restraint and inertia offered by the rest of the structure, the development of nonlinear membrane action and also, the bending-tension (M−N) interaction that develops in the plastic hinges. The analytical procedures to compute the asymptotes in the p–I diagram as well as a parametric study on the p–I diagram are provided. A dimensional analysis of the problem reveals that, under the considered assumptions, four dimensionless parameters mainly influence the required ductility of the beam. Two of them are related to the behavior of the indirectly affected part (the lateral restraint and mass). Another one is related to the mechanical properties of the investigated beam (i.e. the ratio of the bending to axial resistance). The last parameter incorporates scales of the geometry and of the deformed configuration at the onset of the plastic mechanism. [less ▲]

Detailed reference viewed: 108 (36 ULg)
Full Text
Peer Reviewed
See detailValorisation des produits laitiers dans les ménages peuls du Nord-Est du Bénin
Chabi Toko, Roukayath ULg; Adégbidi, Anselme; Lebailly, Philippe ULg

in International Journal of Biological and Chemical Sciences (2015)

La population pastorale et agro-pastorale du Bénin détient presque la totalité du cheptel bovin national. Le lait constitue le produit le plus fréquent issu de l'élevage bovin. Une enquête a été menée ... [more ▼]

La population pastorale et agro-pastorale du Bénin détient presque la totalité du cheptel bovin national. Le lait constitue le produit le plus fréquent issu de l'élevage bovin. Une enquête a été menée dans la commune de Kalalé au sein de 16 ménages peuls afin de comprendre l'organisation de ces ménages dans la gestion du lait. Il ressort que l'organisation autour du capital lait est genre sensible: l'homme aussi bien que la femme, dans leurs rôles respectifs, contribuent à assurer la pérennité du capital bétail. Le lait est géré de façon à privilégier la consommation du ménage et à assurer la reproduction du troupeau. La rémunération du travail fournit ainsi que l'équité dans la distribution des richesses au sein du ménage peul octroi aux femmes qui sont dans le troupeau plus de bénéfices issues du lait provenant du troupeau familial. La disponibilité des produits laitiers dépend de la saison et du milieu. Le lait prévu pour la consommation humaine est gérée de sorte à avoir, une utilisation optimale du lait et de la viande, afin de combler les besoins actuels des membres du ménage, d'assurer la reproduction des biens du ménage ; avant d'alimenter le marché de produits laitiers. [less ▲]

Detailed reference viewed: 86 (4 ULg)
Full Text
Peer Reviewed
See detailQualité de vie du patient sarcopénique : apport de l’étude liégeoise SarcoPhAge
Beaudart, Charlotte ULg; Reginster, Jean-Yves ULg; PETERMANS, Jean ULg et al

in Gériatrie et Psychologie Neuropsychiatrie du Vieillissement (2015), 13(4), 391-5

The consequences of sarcopenia on quality are difficult to evaluate and consequently are quite poorly studied. The few studies assessing the quality of life in sarcopenic subjects currently use generic ... [more ▼]

The consequences of sarcopenia on quality are difficult to evaluate and consequently are quite poorly studied. The few studies assessing the quality of life in sarcopenic subjects currently use generic quality of life questionnaires such as SF36 and EQ5D. The SarcoPhAge study, conducted on a cohort developed in Liège including 534 subjects of 65 years or older, suggested that sarcopenic subjects present a significant worse quality of life in the domains of physical function compared to nonsarcopenic subjects. Generic tools do not cover exhaustively all the areas of potential dysfunction concerned in this geriatric syndrome. Yet, there is no specific and validated quality of life questionnaire for sarcopenia. It would be useful to have at our disposal a sarcopenia specific quality of life questionnaire to assess not only the prospective quality of life of sarcopenic subjects but also to assess the efficacy and the rele [less ▲]

Detailed reference viewed: 15 (8 ULg)
Full Text
See detailÉditorial=Woord vooraf
Decoster, Sara ULg

in Cahiers de la Documentation = Bladen voor Documentatie (2015), 69(4),

Detailed reference viewed: 19 (0 ULg)
Full Text
Peer Reviewed
See detailRevoir Profondo Rosso. Notes sur le retard d'une distinction sociale.
Hamers, Jérémy ULg

in Curreri, Luciano; Delville, Michel (Eds.) Il grande "incubo che mi son scelto" / Le grand "cauchemar de mon choix" (2015)

Detailed reference viewed: 9 (0 ULg)
See detail25 years of environmental expertise in Wallonia
Peters, Arnaud ULg; Defechereux, Olivier ULg; Dachouffe, Michel et al

in Paya Pérez, Ana; Pelaez Sanchez, Sara; Van Liedekerke, Marc (Eds.) Remediated Sites and Brownfields. Success Stories in Europe (2015)

Detailed reference viewed: 5 (0 ULg)
Peer Reviewed
See detailParis et la guérilla urbaine de la RAF. Notes pour un montage entre cinéma, photographie et architecture.
Hamers, Jérémy ULg

in Popovic, Pierre; Hamel, Yan (Eds.) La ville dans les arts et la littérature en France de 1958 à 1981. (2015)

Detailed reference viewed: 24 (2 ULg)
Full Text
Peer Reviewed
See detailTransformed mineral phases during clay ceramic firing
El Ouahabi, Meriam ULg; Daoudi, Lachen; Hatert, Frédéric ULg et al

in Clays and Clay Minerals (2015), 62(6), 470478

Ceramic clays are one of the most complicated ceramic systems because of the very complex relationship between the behavior of minerals during the ceramic processing and the transformations during heating ... [more ▼]

Ceramic clays are one of the most complicated ceramic systems because of the very complex relationship between the behavior of minerals during the ceramic processing and the transformations during heating. A major challenge is to predict the phase transformations in clay ceramics. The aims are to establish reference data of ceramics products that can be formed based on the mineralogical composition of the local raw materials. These data, in turn, can be compared with the archaeological ceramics in order to study their origins. The mineralogical compositions and transformations during the firing (550 to 1100ºC under oxidizing conditions) of seven clayey materials sampled from the main clay deposits of Northern Morocco were evaluated by X-ray powder diffraction. Two groups of clays were evidenced according to the type of neoformed high-temperature minerals: non-calcareous clays and calcareous clays. For the non-calcareous raw materials, spinel is produced at 950°C. Cristobalite and mullite were formed above 1000ºC from clays that contain illite, kaolinite and chlorite. In clays containing vermiculite and high amount of chlorite, hematite was formed from 950°C. Firing of calcareous clays at temperatures > 950ºC yielded Ca-silicates (diopside, gehlenite and wollastonite), spinel, cristobalite, hematite and feldspars. Mullite may also form in the calcareous clay products, when the carbonates content exceeds 10%. [less ▲]

Detailed reference viewed: 161 (47 ULg)
Full Text
Peer Reviewed
See detailQualités métrologiques de la version courte du Neurophysiology of Pain Questionnaire
Demoulin, Christophe ULg; Brasseur, P.; Roussel, N. et al

in Revue du Rhumatisme (2015, December), 82S

Detailed reference viewed: 16 (3 ULg)
Full Text
Peer Reviewed
See detailRecent decline of roach Rutilus rutilus stock in a large river ecosystem in relation with its population dynamics
Otjacques, William; Latli, Adrien; Bernard, Benoît et al

in Fundamental and Applied Limnology (2015), 187(2), 151-163

Studies dealing with quantitative decline of freshwater fish species with long-time series data are rather scarce and primarily limited to migratory species. We present an original work integrating over ... [more ▼]

Studies dealing with quantitative decline of freshwater fish species with long-time series data are rather scarce and primarily limited to migratory species. We present an original work integrating over two decades investigations on roach (Rutilus rutilus L.) stock, one of the dominant cyprinid fish species in the River Meuse (Belgium). This study aimed to quantify changes in the stock of roach after recent indicators (captures from sport fishermen) suggested a sharp decline. Three methods were used: capture-mark-recapture (CMR) estimation, catch per unit of effort by gillnetting (CPUE) and long-term monitoring of fish-passes. Population dynamics of roach was also investigated. CMR method demonstrated a decrease of 91% of the roach stock compared to earlier data (1993–2003), with current densities close to 300 roach ha–1. This was also confirmed by a decrease of 95 % in CPUEs and a decrease between 93 and 98 % in two fish-passes during the same period. On the other hand, growth and mortality did not indicate radical changes before and after the decline was found. As roach stock decline is generalizable to the whole Belgian’s Meuse following estimations in two other sites, further investigations are needed to explain the reasons underlying this decline in order to take conservation measures. First, the uptake of primary production (i.e. phytoplankton) by invasive clams is supposed. And secondly, an increase in predation pressure by the Great Cormorant is effective as this avian predator was found in high densities from 2000 until 2006. [less ▲]

Detailed reference viewed: 40 (4 ULg)
Full Text
See detailComparison of active thermography techniques for the inspection and defect characterisation of carbon fiber composites
Fernandes, Henrique; Georges, Marc ULg; Crabus, Georges et al

Conference (2015, December)

Detailed reference viewed: 48 (2 ULg)
See detailDynamic responses of cyanobacterial communities following glacier retreat in the High Arctic (Svalbard)
Stelmach Pessi, Igor ULg; Pushkareva, Ekaterina; Elster, Josef et al

Scientific conference (2015, December)

Detailed reference viewed: 18 (4 ULg)