Last 7 days     Results 2621-2640 of 61715.   127 128 129 130 131 132 133 134 135 136 137   Advancing the integration of corporate sustainability measurement, management and reportingMaas, Karen; Schaltegger, Stefan; Crutzen, Nathalie in Journal of Cleaner Production (2016), 133Detailed reference viewed: 64 (5 ULg) X-ray and optical spectroscopy of the massive young open cluster IC 1805Rauw, Grégor ; Nazé, Yaël in Astronomy and Astrophysics (2016), 594(A82), 19Context. Very young open clusters are ideal places to study the X-ray properties of a homogeneous population of early-type stars. In this respect, the IC 1805 open cluster is very interesting as it hosts ... [more ▼]Context. Very young open clusters are ideal places to study the X-ray properties of a homogeneous population of early-type stars. In this respect, the IC 1805 open cluster is very interesting as it hosts the O4 If+ star HD 15570 thought to be in an evolutionary stage intermediate between a normal O-star and a Wolf-Rayet star. Aims: Such a star could provide a test for theoretical models aiming at explaining the empirical scaling relation between the X-ray and bolometric luminosities of O-type stars. Methods: We have observed IC 1805 with XMM-Newton and further collected optical spectroscopy of some of the O-star members of the cluster. Results: The optical spectra allow us to revisit the orbital solutions of BD+60° 497 and HD 15558, and provide the first evidence of binarity for BD+60° 498. X-ray emission from colliding winds does not appear to play an important role among the O-stars of IC 1805. Notably, the X-ray fluxes do not vary significantly between archival X-ray observations and our XMM-Newton pointing. The very fast rotator BD+60° 513, and to a lesser extent the O4 If+ star HD 15570 appear somewhat underluminous. Whilst the underluminosity of HD 15570 is only marginally significant, its amplitude is found to be compatible with theoretical expectations based on its stellar and wind properties. A number of other X-ray sources are detected in the field, and the brightest objects, many of which are likely low-mass pre-main sequence stars, are analyzed in detail. [less ▲]Detailed reference viewed: 16 (4 ULg) Discovery of WASP-113b and WASP-114b, two inflated hot-Jupiters with contrasting densitiesBarros, S. C. C.; Brown, D. J. A.; Hébrard, G. et alin Astronomy and Astrophysics (2016), 593We present the discovery and characterisation of the exoplanets WASP-113b and WASP-114b by the WASP survey, {\it SOPHIE} and {\it CORALIE}. The planetary nature of the systems was established by ... [more ▼]We present the discovery and characterisation of the exoplanets WASP-113b and WASP-114b by the WASP survey, {\it SOPHIE} and {\it CORALIE}. The planetary nature of the systems was established by performing follow-up photometric and spectroscopic observations. The follow-up data were combined with the WASP-photometry and analysed with an MCMC code to obtain system parameters. The host stars WASP-113 and WASP-114 are very similar. They are both early G-type stars with an effective temperature of $\sim 5900\,$K, [Fe/H]$\sim 0.12$ and $T_{\rm eff}$ $\sim 4.1$dex. However, WASP-113 is older than WASP-114. Although the planetary companions have similar radii, WASP-114b is almost 4 times heavier than WASP-113b. WASP-113b has a mass of $0.48\,$ $\mathrm{M}_{\rm Jup}$ and an orbital period of $\sim 4.5\,$days; WASP-114b has a mass of $1.77\,$ $\mathrm{M}_{\rm Jup}$ and an orbital period of $\sim 1.5\,$days. Both planets have inflated radii, in particular WASP-113 with a radius anomaly of $\Re=0.35$. The high scale height of WASP-113b ($\sim 950$ km ) makes it a good target for follow-up atmospheric observations. [less ▲]Detailed reference viewed: 12 (2 ULg) Using PCB signatures and enantiomer fractions for source identification and to age date exposureMegson, D; Focant, Jean-François ; Patterson, D et alConference (2016, October)Detailed reference viewed: 30 (2 ULg) Microsampling and Screening Technologies for Human Biomonitoring of Selected Persistent Organic Pollutants (POPs)Calaprice, Chiara ; L'Homme, B; Focant, Jean-François Conference (2016, October)Detailed reference viewed: 25 (3 ULg) Dioxins! Hunting the Great White.Focant, Jean-François Scientific conference (2016, October)Detailed reference viewed: 28 (2 ULg) A Simple Method for Thermal Characterization of Low-Melting Temperature Phase Change Materials (PCMs)Salvador, Lucas ; Hastanin, Juriy ; Novello, Frédéric et alin COMSOL 2016 Proceedings (2016, October)The successful implementation of a high-efficient latent heat storage system necessitates an appropriate experimental approach to investigate and quantify the variations of the Phase Change Material (PCM ... [more ▼]The successful implementation of a high-efficient latent heat storage system necessitates an appropriate experimental approach to investigate and quantify the variations of the Phase Change Material (PCM) thermal properties caused by its aging, as well as its potential demixing induced by cyclic freezing and melting. In this paper, we present a concept for the PCM characterization. The proposed method is relatively simple to be implemented. It consists of a cyclic cooling and melting of the PCM sample placed into a tube and monitoring its temperature evolution with a set of temperature sensors. In our work, the temperature evolution of the sample, as well as its sensitivity to the thermal parameters have been numerically investigated using the COMSOL Multiphysics® software. [less ▲]Detailed reference viewed: 26 (2 ULg) Multimodal Connectivity-Based Parcellation of the BrainReuter, Niels; Plachti, Anna; Genon, Sarah et alPoster (2016, October)Detailed reference viewed: 29 (2 ULg) Projet BELCAM: télédétection des besoins et rendements des culturesWellens, Joost Speech/Talk (2016)Detailed reference viewed: 25 (8 ULg) Transmission Efficiency of Cucumber Mosaic Virus by Myzus persicae According to Virus Strain and Aphid Clone from ChinaBosquée, Emilie ; Yin, Ronling; Bragard, Claude et alin Asian Journal of Plant Pathology (2016)Background: Cucumber mosaic virus (CMV) is one of the most important viruses infecting vegetables in the fields throughout the world. Transmission efficiency of CMV could depend on the variability of ... [more ▼]Background: Cucumber mosaic virus (CMV) is one of the most important viruses infecting vegetables in the fields throughout the world. Transmission efficiency of CMV could depend on the variability of virus strain but also aphid vector species and/or clones. Materials and Methods: By sequence analysis, the coat protein gene of CMV strains from different regions revealed that the CMV isolates used for this study belong to the same group. Both CMV strains and Myzus persicae (Sulzer) aphid clones were investigated for their role in viral dispersion by reciprocal tests on Nicotiana tabacum (L.) using the same clone of Myzus persicae towards different CMV strains or using one CMV strain on different Myzus persicae clones. Results: Virus transmission efficiency was found to be significantly influenced by selected CMV strains (from 5-30% of transmission rate for identical aphid clone) and also by the selected aphid clones (variation from 15-70% of transmission rate for identical virus strain). Conclusion: The CMV transmission efficiency depends on the variability of virus strain but also aphid vector clones. Combining the variability of CMV transmission rates for both aphid and virus sides, the prediction and modeling of virus spreading seems to be difficult to organize and are closely dependent on the variability of each protagonist-aphid and virus. [less ▲]Detailed reference viewed: 70 (10 ULg) La philosophie de la conscience comme intertexte des Temps Modernes et de CritiqueFranck, Thomas in Slamti, Sad; Chakir, Bouchra (Eds.) L'Interculturel dans la littérature et les arts. Matière et manière intertextuelles (2016)Detailed reference viewed: 24 (6 ULg) A review of Silurian dispersed spore assemblages from the Arabian Plate: biostratigraphy and palaeogeographyWellman, CH; Steemans, Philippe ; Breuer, P et alConference (2016, October)Detailed reference viewed: 32 (4 ULg) Le bouleau, une essence qui s'impose. Description de la ressource dans son aire de distributionDubois, Héloïse ; Latte, Nicolas ; Lecomte, Hugues et alin FORÊT.NATURE (2016), 140L'essentiel de la ressource en bouleau (verruqueux et pubescent) se situe en Russie et en Scandinavie (15 milliards de m³) et cette ressource augmente graduellement depuis plusieurs années. Il y est ... [more ▼]L'essentiel de la ressource en bouleau (verruqueux et pubescent) se situe en Russie et en Scandinavie (15 milliards de m³) et cette ressource augmente graduellement depuis plusieurs années. Il y est fortement valorisé en sciage, déroulage et trituration. En Europe de l'Ouest, cette croissance s'observe aussi, même si seulement 1 % de la ressource s'y concentre (dû notamment à la plus grande diversité d'essences commerciales présentes). En Wallonie, les évolutions du contexte socio-économique et environnemental jouent en faveur d'une augmentation de la présence du bouleau (parcelles non reboisées, entretien insuffisant, mélanges spontanés...). Le bouleau représente souvent une belle opportunité pour les mélanges, une excellente essence d'accompagnement et une diversification de la production. Mais, sans une sylviculture adaptée, les grumes sont généralement de faible dimension et présentent de nombreux défauts. C'est le cas de l'essentiel de la ressource actuelle en Wallonie. Aujourd'hui, les besoins sont de mieux le connaître, notamment les opportunités de valorisation, et d'aboutir à des recommandations sylvicoles. Il ne s'agit donc pas de vouloir faire du bouleau à tout prix mais plutôt de tirer profit d'une étape transitoire de la succession forestière. [less ▲]Detailed reference viewed: 27 (8 ULg) Conjoint influence of mind-wandering and sleepiness on task performanceStawarczyk, David ; D'Argembeau, Arnaud in Journal of Experimental Psychology. Human Perception & Performance (2016), 42(10), 1587-15600Recent research suggests that sleepiness and mind-wandering—the experience of thoughts that are both stimulus-independent and task-unrelated—frequently co-occur and are both associated with poorer ... [more ▼]Recent research suggests that sleepiness and mind-wandering—the experience of thoughts that are both stimulus-independent and task-unrelated—frequently co-occur and are both associated with poorer cognitive functioning. Whether these two phenomena have distinguishable effects on task performance remains unknown, however. To investigate this question, we employed the online experience sampling of mind-wandering episodes and subjective sleepiness during a laboratory task (the Sustained Attention to Response Task; SART), and also assessed mind-wandering frequency and sleep-related disturbances in daily life using self-report questionnaires. The results revealed that the tendency to experience mind-wandering episodes during the SART and daily life was associated with higher levels of daytime sleepiness and sleep-related disturbances. Importantly, however, mind-wandering and sleepiness were independent predictors of SART performance at both the within- and between-individuals levels. These findings demonstrate that, although mind-wandering and sleepiness frequently co-occur, these two phenomena have distinguishable and additive effects on task performance. [less ▲]Detailed reference viewed: 206 (8 ULg) Potential for Composite Analysis in the Black SeaCapet, Arthur ; Mason, Evan; Troupin, Charles et alConference (2016, October)Detailed reference viewed: 24 (11 ULg) Quantitative Three-Dimensional Color Flow Echocardiography of Chronic Mitral Regurgitation: New Methods, New Perspectives, New Challengeszhou, x; vannan, m; LANCELLOTTI, Patrizio in Journal of the American Society of Echocardiography (2016), 29(10), 935-937Detailed reference viewed: 9 (1 ULg) Analysis of the Nonlinear Dynamics of an F-16 Aircraft Using the NI2D ToolboxDetroux, Thibaut ; Dossogne, Tilàn ; Masset, Luc et alConference (2016, October)Detailed reference viewed: 20 (8 ULg) Robust discriminant analysis based on the joint graphcial lasso estimatorAerts, Stéphanie ; Croux, Christophe; Wilms, InesPoster (2016, October)Linear and Quadratic Discriminant Analysis (LDA/QDA) are the most often applied classification rules under the normality assumption. When there is not enough data, the quadratic rule, which requires the ... [more ▼]Linear and Quadratic Discriminant Analysis (LDA/QDA) are the most often applied classification rules under the normality assumption. When there is not enough data, the quadratic rule, which requires the estimation of one precision matrix in each class, is often replaced by the linear one, based on the homoscedasticity assumption. This strong assumption is however rarely verified in practice and ignores the intrinsic différences between groups that may be of particular interest in the classification context. In this aper, alternatives to the usual maximum likelihood estimates for the precision matrices are proposed that borrow strength across classes while allowing for heterogeneity at the same time. This results in a classifier that is intermediate between QDA and LDA. Moreover, our estimator is sparse: the undesirable effect of uninformative variables is reduced. The performance of the method is illustrated through simulated and real dataset examples. [less ▲]Detailed reference viewed: 39 (2 ULg) Iohexol plasma clearance for measuring glomerular filtration rate in clinical practice and research: a review. Part 2: Why to measure glomerular filtration rate with iohexol?DELANAYE, Pierre ; Melson, Toralf; Ebert, Natalie et alin Clinical Kidney Journal (2016)2 | P. Delanaye et al. Abstract A reliable assessment of glomerular filtration rate (GFR) is of paramount importance in clinical practice as well as epidemiological and clinical research settings. It is ... [more ▼]2 | P. Delanaye et al. Abstract A reliable assessment of glomerular filtration rate (GFR) is of paramount importance in clinical practice as well as epidemiological and clinical research settings. It is recommended by Kidney Disease: Improving Global Outcomes guidelines in specific populations (anorectic, cirrhotic, obese, renal and non-renal transplant patients) where estimation equations are unreliable. Measured GFR is the only valuable test to confirm or confute the status of chronic kidney disease (CKD), to evaluate the slope of renal function decay over time, to assess the suitability of living kidney donors and for dosing of potentially toxic medication with a narrowtherapeutic index. Abnormally elevatedGFRor hyperfiltration in patients with diabetes or obesity can be correctly diagnosed only by measuring GFR. GFR measurement contributes to assessing the true CKD prevalence rate, avoiding discrepancies duetoGFRestimation with different equations. Usingmeasured GFR, successfullyaccomplished in large epidemiological studies, is the onlyway to study the potential link between decreased renal functionand cardiovascular or total mortality, being sure that this association is not due to confounders, i.e. non-GFR determinants of biomarkers. In clinical research, it has been shown that measured GFR (or measured GFR slope) as a secondary endpoint as compared with estimated GFR detected subtle treatment effects and obtained these results with a comparatively smaller sample size than trials choosing estimated GFR. Measuring GFR by iohexol has several advantages: simplicity, low cost, stability and low interlaboratory variation. Iohexol plasma clearance represents the best chance for implementing a standardized GFR measurement protocol applicable worldwide both in clinical practice and in research. [less ▲]Detailed reference viewed: 13 (3 ULg) Iohexol plasma clearance for measuring glomerular filtration rate in clinical practice and research: a review. Part 1 : How to measure glomerular filtration rate with iohexol?DELANAYE, Pierre ; Ebert, Natalie; Melsom, Toralf et alin Clinical Kidney Journal (2016)While there is general agreement on the necessity tomeasure glomerular filtration rate (GFR) inmany clinical situations, there is less agreement on the bestmethod to achieve this purpose. As the gold ... [more ▼]While there is general agreement on the necessity tomeasure glomerular filtration rate (GFR) inmany clinical situations, there is less agreement on the bestmethod to achieve this purpose. As the gold standardmethod for GFR determination, urinary (or renal) clearance of inulin, fades into the background due to inconvenience and high cost, a diversity of filtrationmarkers and protocols compete to replace it. In this review, we suggest that iohexol, a non-ionic contrast agent, is most suited to replace inulin as the marker of choice for GFR determination. Iohexol comes very close to fulfilling all requirements for an ideal GFRmarker in terms of low extra-renal excretion, low protein binding and in being neither secreted nor reabsorbed by the kidney. In addition, iohexol is virtually non-toxic and carries a low cost. As iohexol is stable in plasma, administration and sample analysis can be separated in both space and time, allowing access to GFR determination across different settings. An external proficiency programme operated by Equalis AB, Sweden, exists for iohexol, facilitating interlaboratory comparison of results. Plasma clearance measurement is the protocol of choice as it combines a reliable GFR determination with convenience for the patient. Single-sample protocols dominate, butmultiple-sample protocolsmay bemore accurate in specific situations. In lowGFRs one ormore late samples should be included to improve accuracy. In patients with large oedema or ascites, urinary clearance protocols should be employed. In conclusion, plasma clearance of iohexol may well be the best candidate for a common GFR determination method. [less ▲]Detailed reference viewed: 26 (7 ULg)