Last 7 days     Results 621-640 of 22951.   27 28 29 30 31 32 33 34 35 36 37   Event justice and social entity justice: A cross-lagged analysisMarzucco, Laurence ; Hansez, Isabelle Poster (2014, May)ABSTRACT This study aimed to examine the directionality of the relationship between event justice and social entity justice. Using two samples and a cross-lagged panel analysis with two measurement times ... [more ▼]ABSTRACT This study aimed to examine the directionality of the relationship between event justice and social entity justice. Using two samples and a cross-lagged panel analysis with two measurement times, social entity justice was found to predict event justice (procedural, distributive, interpersonal and informational justice event), supporting the top-down process. PRESS PARAGRAPH The life of organizations is punctuated by a wide range of managerial decisions (e.g., hiring, performance appraisal or organizational change). Facing such events, employees evaluate the fairness of the situation experienced. However, little is known about how employees develop justice judgments. This study shows that employees’ fairness perceptions about their organization influence their interpretation of the fairness of subsequent events involving the organization. Building and fostering a climate of justice is therefore of primary importance for organizations, since global fairness perceptions about the organization may help employees to perceive a specific event, such as a managerial decision, as being fair. [less ▲]Detailed reference viewed: 20 (2 ULg) Azione, testualizzazione, notazioneDondero, Maria Giulia in Pezzini, Isabella; Spaziante, Lucio (Eds.) Arti del vivere e semiotica (2014)Detailed reference viewed: 14 (0 ULg) Work-home interference and well-being: A cross-lagged analysis.Babic, Audrey ; Stinglhamber, Florence; Barbier, Marie et alPoster (2014, May)Detailed reference viewed: 25 (7 ULg) L'enfant placé au carrefour de ses appartenancesAubinet, Suzanne Poster (2014, May)Michard (2009) nous dit de la loyauté qu’elle est l’armature de l’appartenance et à Neuburger de souligner qu’en plus d’être un socle sur lequel l’identité se structure, l’appartenance contient et limite ... [more ▼]Michard (2009) nous dit de la loyauté qu’elle est l’armature de l’appartenance et à Neuburger de souligner qu’en plus d’être un socle sur lequel l’identité se structure, l’appartenance contient et limite les effets des relations (2003). Pour Onnis (2008) c’est dans la dialectique entre identité et appartenance que naît l’individualité qui, elle, se réalise dans la relation (Dolto, 1988). Plymackers (2006) insiste sur les notions d’espaces où se nouent ces relations mais aussi de temps où ces dernières se jouent. L’enfant, par des mouvements dialectiques d’allées et venues avec son/ses système(s) d’appartenances tisse pas à pas les prémices de son identité. Ses relations structurent et étayent ce processus et la temporalité constitue le squelette de celui-ci. Mais qu’en est-il de ces enfants placés, maltraités, déplacés ? Qu’en est-il si le conflit ou le clivage de loyauté entre famille(s) et institution(s) rend l’étayage de l’appartenance ardu ? Qu’en est-il si la discontinuité des espaces et des relations prédomine et si le processus d’individuation est suspendu par une séparation arbitraire dictée par un autrui qui « n’appartient pas » ? L’analyse clinique de cas d’enfants aux vécus chaotiques rythmés par de nombreux placements nous permet de décortiquer les particularités de ce processus complexifié par ces ruptures d’espaces, ces loyautés morcelées, ces appartenances diffuses et d’en cerner les impacts. [less ▲]Detailed reference viewed: 36 (2 ULg) Nanoporous catalysts with enhanced properties for pollutant and waste treatmentHeinrichs, Benoît ; Lambert, Stéphanie Poster (2014, May)Detailed reference viewed: 18 (4 ULg) Time and Contemplation in Francesco Piccolimini’s Naturæ Totius Universæ ScientiaDubouclez, Olivier Conference (2014, May)Detailed reference viewed: 7 (0 ULg) The XMM-Newton view of the yellow hypergiant IRC+10420 and its surroundingsDe Becker, Michaël ; Hutsemekers, Damien ; Gosset, Eric in New Astronomy (2014), 29Among evolved massive stars likely in transition to the Wolf-Rayet phase, IRC +10420 is probably one of the most enigmatic. It belongs to the category of yellow hypergiants and it is characterized by ... [more ▼]Among evolved massive stars likely in transition to the Wolf-Rayet phase, IRC +10420 is probably one of the most enigmatic. It belongs to the category of yellow hypergiants and it is characterized by quite high mass loss episodes. Even though IRC+10420 benefited of many observations in several wavelength domains, it has never been a target for an X-ray observatory. We report here on the very first dedicated observation of IRC+10420 in X-rays, using the XMM-Newton satellite. Even though the target is not detected, we derive X-ray flux upper limits of the order of 1–3 ×10−14 erg cm−2 s−1 (between 0.3 and 10.0 keV), and we discuss the case of IRC+10420 in the framework of emission models likely to be adequate for such an object. Using the Optical/UV Monitor on board XMM-Newton, we present the very first upper limits of the flux density of IRC +10420 in the UV domain (between 1800 and 2250 Å and between 2050 and 2450 Å). Finally, we also report on the detection in this field of 10 X-ray and 7 UV point sources, and we briefly discuss their properties and potential counterparts at longer wavelengths. [less ▲]Detailed reference viewed: 34 (7 ULg) A hybrid human-computer approach for large-scale image-based measurements using web services and machine learningMarée, Raphaël ; Rollus, Loïc ; Stevens, Benjamin et alin Proceedings IEEE International Symposium on Biomedical Imaging (2014, May)We present a novel methodology combining web-based software development practices, machine learning, and spatial databases for computer-aided quantification of regions of interest (ROIs) in large-scale ... [more ▼]We present a novel methodology combining web-based software development practices, machine learning, and spatial databases for computer-aided quantification of regions of interest (ROIs) in large-scale imaging data. We describe our main methodological choices, and then illustrate the benefits of the approach (workload reduction, improved precision, scalability, and traceability) on hundreds of whole-slide images of biological tissue slices in cancer research. [less ▲]Detailed reference viewed: 81 (20 ULg) Improvement in non-linear guitar loudspeaker sound reproductionSchmitz, Thomas ; Embrechts, Jean-Jacques in International Conference on Systems, Signals and Image Processing (2014, May)This paper proposes a study of the accuracy of a guitar amplifier loudspeaker simulation. The simulation is based on a non-linear convolution of a signal using Volterra kernels, which are measured in ... [more ▼]This paper proposes a study of the accuracy of a guitar amplifier loudspeaker simulation. The simulation is based on a non-linear convolution of a signal using Volterra kernels, which are measured in anechoic conditions with a sine-sweep technique. In this paper, we propose an evaluation of the method to minimise the cost in CPU load, while keeping the best performance in the sound reproduction. To assess the performance of the method, we measure errors between the simulated and real sounds. Human listening tests are moreover proposed in order to determine the minimum level of accuracy leading to unaudible differences with the real loudspeaker.. [less ▲]Detailed reference viewed: 18 (4 ULg) Performances of low-level audio classifiers for large-scale music similarityOsmalsky, Julien ; Van Droogenbroeck, Marc ; Embrechts, Jean-Jacques in International Conference on Systems, Signals and Image Processing (2014, May)This paper proposes a survey of the performances of binary classifiers based on low-level audio features, for music similarity in large-scale databases. Various low-level descriptors are used individually ... [more ▼]This paper proposes a survey of the performances of binary classifiers based on low-level audio features, for music similarity in large-scale databases. Various low-level descriptors are used individually and then combined using several fusion schemes in a content-based audio retrieval system. We show the performances of the classifiers in terms of pruning and loss and we demonstrate that some combination schemes achieve a better performance at a minimum computational cost. [less ▲]Detailed reference viewed: 28 (15 ULg) EVALUATION OF THE RAPID DETECTION OF ST-17 AND ST-1 GROUP B STREPTOCOCCI USING A MICROFLEX MALDI-TOF MS (BRUKER)MEEX, Cécile ; SACHELI, Rosalie ; DESCY, Julie et alPoster (2014, May)Objectives Clearly associated to neonatal meningitis, Group B streptococci (GBS) classified as sequence type-17 (ST-17) are defined as the “highly virulent” clone amongst GBS. The aim of this study was to ... [more ▼]Objectives Clearly associated to neonatal meningitis, Group B streptococci (GBS) classified as sequence type-17 (ST-17) are defined as the “highly virulent” clone amongst GBS. The aim of this study was to evaluate an easy and rapid method, recently described to detect ST-17 and ST-1 GBS, based on distinguishing peak-shifts present on the protein spectrum of these 2 sequence types, using a Microflex (Bruker) matrix-assisted laser desorption/ionization time of flight mass spectrometer (MALDI-TOF MS). Methods This study was performed on 67 multi locus sequence typed (MLST) GBS originated from the Belgian and Czech National Reference Centers, including 18 ST-17 and 16 ST-1. After culture on blood agar, an ethanol/formic acid extraction was performed on each strain. Each extract was spotted once on a target plate, overlaid with 1 µl alpha-cyano-4-hydroxycinnamic acid matrix and further analysed by a Microflex MALDI-TOF MS. One spectrum per isolate was recorded, 240 laser shots being recorded for each spectrum. The spectra were further analysed using a Bruker prototype software, and 2 logarithmic values, one for ST-17 and one for ST-1, calculated from the intensities of the present and absent peaks, were obtained for each strain. If >0, this value indicated the presence of the specific sequence type. In a second step, the test was repeated on each strain with discordant result when compared with MLST. Results Compared with MLST method, the first analysis of the strains gave poor results, leading to very low sensitivities (77.8% for ST-17 and 50% for ST-1) but rather good specificities (85.7% for ST-17 and 98.0% for ST-1). After repeating the analysis on the strains with discordant result, sensitivity, 100% and 93.8%, and specificity, 87.8% and 98.0%, for ST-17 and ST-1 respectively were highly improved. Conclusion Since ST-17 and ST-1 GBS both show distinguishing peak-shifts on their protein spectrum, as described by Lartigue et al., the distinction of these 2 sequence types is now possible by MALDI-TOF MS. To our knowledge, this study is the first describing this application on a Microflex MS using a software to classify the strains. The observed results are promising but, given to the variability of the logarithmic value given by the software, the need to perform several measures on a same strain seems to be essential. After optimization of the analysis procedure, this rapid, easy and cheap method could be used to precociously detect ST-17 among GBS isolated from prenatal screenings, allowing a better follow up of the colonized mothers and a closer monitoring of their newborns. We would like to thank the Bruker Company which allowed us to evaluate the prototype software they have developed. [less ▲]Detailed reference viewed: 16 (4 ULg) X-ray microtomography: A porosity-based thresholding method to improve soil pore network characterization?Beckers, Eléonore ; Plougonven, Erwan ; Roisin, Christian et alin Geoderma (2014), 219-220X-ray microtomography, through quantification of soil structure at the microscale, could greatly facilitate the current understanding of soil hydrodynamic behaviour. However, binarisation method and ... [more ▼]X-ray microtomography, through quantification of soil structure at the microscale, could greatly facilitate the current understanding of soil hydrodynamic behaviour. However, binarisation method and processing choices are subjective and can have a strong impact on results and conclusions. In this study, we test a new method based on the porosity detectable by X-ray microtomography, while validation is achieved through comparison of soil microtomogram information with soil physical measurements. These measurements consist of water retention and unsaturated hydraulic conductivity using two different soil populations with only structural differences. To assess the porosity-based method performances, we compare it to four other methods, namely the global method of Otsu and three recent soil-dedicated local methods. The robustness of the porosity-based method is also tested in regard to different pre-processing procedures. In this paper we demonstrate that soil segmentation through a porosity-based method is an interesting issue. Indeed, it is less demanding in terms of time and computational requirements than its alternatives, and combines robustness and performances broadly comparable with the recent local methods. [less ▲]Detailed reference viewed: 18 (8 ULg) Communiste, social révolutionnaire, antisémite? D'un usage détourné de la radicalité ouvrière par les mouvements terroristes d'extrême gauche allemands.Jander, Martin; Hamers, Jérémy in Quaderni : la Revue de la Communication (2014)Detailed reference viewed: 25 (2 ULg) « La flexicurité : une politique des idées ? Regards croisés d’acteurs institutionnels belges en 2013 »Beuker, Laura ; Gérard, Julie ; Orianne, Jean-François Conference (2014, May)Cette communication porte sur la traduction, en Belgique, d’une politique européenne de l’emploi – la flexicurité – par différents acteurs institutionnels. À partir d’une analyse documentaire et d’une ... [more ▼]Cette communication porte sur la traduction, en Belgique, d’une politique européenne de l’emploi – la flexicurité – par différents acteurs institutionnels. À partir d’une analyse documentaire et d’une vingtaine d’entretiens semi-directifs, nous étudierons la manière dont ces acteurs s’approprient et interprètent la flexicurité. Nous nous appuierons principalement sur les apports récents de la sociologie de l’action publique, en particulier l’approche cognitive des politiques publiques (Surel, 2000 ; Muller et Surel, 1998) et l’européanisation des politiques d’emploi (Palier et Surel, 2007 ; 2010). Nous montrerons que cette appropriation a donné lieu, en Belgique, à une transformation de sens conféré à la sécurité, celle-ci étant dorénavant substitué à celui de la flexibilité. [less ▲]Detailed reference viewed: 6 (1 ULg) Design of a reliable processing pipeline for the non-intrusive measurement of feet trajectories with lasersPierard, Sébastien ; Azrour, Samir ; Van Droogenbroeck, Marc in International Conference on Acoustics, Speech, and Signal Processing (ICASSP) (2014, May)Reliable measurements of feet trajectories are needed in some applications, such as biomedical applications. This paper describes the data processing pipeline used in GAIMS, which is a non-intrusive ... [more ▼]Reliable measurements of feet trajectories are needed in some applications, such as biomedical applications. This paper describes the data processing pipeline used in GAIMS, which is a non-intrusive system that measures feet trajectories based on multiple range laser scanners. Our processing pipeline relies on a new tracking paradigm, and it is based on two innovative algorithms: the first algorithm localizes the feet directly from the observed point cloud without any clustering, and the other algorithm identifies the feet. After reviewing the various types of noise affecting the point cloud, this paper explains the limitations of the classical processing approach and gives an overview of our new pipeline. The effectiveness of the proposed approach is established by discussing the results that have been obtained in several studies based on GAIMS. [less ▲]Detailed reference viewed: 20 (4 ULg) Analysis of transient scattering problems using a discontinuous Galerkin method: application to the shielding effectiveness of enclosures with heterogeneous wallsBoubekeur, Mohamed; Kameni, Abelin; Pichon, Lionel et alin International Journal of Numerical Modelling: Electronic Networks, Devices and Fields (2014), 27(3), 626-635In this paper, different formulations of Maxwell equations are combined for computing the shielding effectiveness of enclosures made from heterogeneous periodic materials. The validity of the homogenized ... [more ▼]In this paper, different formulations of Maxwell equations are combined for computing the shielding effectiveness of enclosures made from heterogeneous periodic materials. The validity of the homogenized parameters given by Maxwell-Garnett rules in the frequency domain are tested in the time domain using a nodal discontinuous Galerkin method, which uses an interface condition based on analytical solution in the frequency domain to replace a conductive sheet. This interface condition allows to avoid meshing the thin sheet, thus reducing the computational cost. Results of scattering by composite enclosures are presented in the frequency domain thanks to a Fast Fourier Transform. [less ▲]Detailed reference viewed: 24 (7 ULg) Les tourbières sont-elles des réservoirs pour les vecteurs de maladies émergentes ? Evaluation des populations de Culicoides (Diptera: Ceratopogonidae) dans la réserve naturelle des Hautes Fagnes (Belgique)Zimmer, Jean-Yves ; Fagot, Jean; Smeets, François et alin Documents de la Station scientifique des Hautes-Fagnes (2014)Detailed reference viewed: 12 (1 ULg) Biologie cellulaire. Exercices et méthodesThiry, Marc ; Racano, Sandra; Rigo, PierreBook published by Dunod (2014)Cet ouvrage propose aux étudiants des premières années d’études supérieures une méthode progressive et conviviale pour comprendre et appliquer les concepts fondamentaux de la biologie cellulaire. Des ... [more ▼]Cet ouvrage propose aux étudiants des premières années d’études supérieures une méthode progressive et conviviale pour comprendre et appliquer les concepts fondamentaux de la biologie cellulaire. Des bonus web avec des exercices d'entrainement supplémentaires complètent l'ouvrage. Cet ouvrage propose aux étudiants des premières années d’études supérieures une méthode progressive et conviviale pour comprendre et appliquer les concepts fondamentaux de la biologie cellulaire. À la suite de rappels de cours, sous forme de fiches, chaque chapitre propose des exercices de difficulté croissante pour s’évaluer : QCM, questions Vrai/Faux et exercices de synthèse. Les corrigés détaillés mettent en évidence la méthodologie. Des bonus web avec des exercices d’entraînement supplémentaires complètent l’ouvrage. [less ▲]Detailed reference viewed: 10 (1 ULg) Heterochrony in a complex world: disentangling environmental processes of facultative paedomorphosis in an amphibianDenoël, Mathieu ; Ficetola, Gentile Francescoin Journal of Animal Ecology (2014), 83(606-615), 1. Heterochrony, the change in the rate or timing of development between ancestors and their descendants, plays a major role in evolution. When heterochrony produces polymorphisms, it offers the ... [more ▼]1. Heterochrony, the change in the rate or timing of development between ancestors and their descendants, plays a major role in evolution. When heterochrony produces polymorphisms, it offers the possibility to test hypotheses that could explain its success across environments. Amphibians are particularly suitable to exploring these questions because they express complex life cycles (i.e. metamorphosis) that have been disrupted by heterochronic processes (paedomorphosis: retention of larval traits in adults). The large phenotypic variation across populations suggests that more complex processes than expected are operating, but they remain to be investigated through multivariate analyses over a large range of natural populations across time. 2. In this study we compared the likelihood of multiple potential environmental determinants of heterochrony. We gathered data on the proportion of paedomorphic and metamorphic palmate newts (Lissotriton helveticus) across more than 150 populations during 10 years, and used an information-theoretic approach to compare the support of multiple potential processes. 3. Six environmental processes jointly explained the proportion of paedomorphs in populations: predation, water availability, dispersal limitation, aquatic breathing, terrestrial habitat suitability, and anti-predator refuges. Analyses of variation across space and time supported models based on the advantage of paedomorphosis in favourable aquatic habitats. 4. Paedomorphs were favoured in deep ponds, in conditions favourable to aquatic breathing (high oxygen content), with lack of fish, and surrounded by suitable terrestrial habitat. Metamorphs were favoured by banks allowing easy dispersal. 5. These results indicate that heterochrony relies on complex processes involving multiple ecological variables and exemplifies why heterochronic patterns occur in contrasted environments. On the other hand, the fast selection of alternative morphs shows that metamorphosis and paedomorphosis developmental modes could be easily disrupted in natural populations. [less ▲]Detailed reference viewed: 135 (68 ULg) Transit confirmation and improved stellar and planet parameters for the super-Earth HD 97658 b and its host starVan Grootel, Valérie ; Gillon, Michaël ; Valencia, D. et alin Astrophysical Journal (2014), 786Super-Earths transiting nearby bright stars are key objects that simultaneously allow for accurate measurements of both their mass and radius, providing essential constraints on their internal composition ... [more ▼]Super-Earths transiting nearby bright stars are key objects that simultaneously allow for accurate measurements of both their mass and radius, providing essential constraints on their internal composition. We present here the confirmation, based on Spitzer transit observations, that the super-Earth HD 97658 b transits its host star. HD 97658 is a low-mass ($M_*=0.77\pm0.05\,M_{\odot}$) K1 dwarf, as determined from the Hipparcos parallax and stellar evolution modeling. To constrain the planet parameters, we carry out Bayesian global analyses of Keck-HIRES radial velocities, and MOST and Spitzer photometry. HD 97658 b is a massive ($M_P=7.55^{+0.83}_{-0.79} M_{\oplus}$) and large ($R_{P} = 2.247^{+0.098}_{-0.095} R_{\oplus}$ at 4.5 $\mu$m) super-Earth. We investigate the possible internal compositions for HD 97658 b. Our results indicate a large rocky component, by at least 60% by mass, and very little H-He components, at most 2% by mass. We also discuss how future asteroseismic observations can improve the knowledge of the HD 97658 system, in particular by constraining its age. Orbiting a bright host star, HD 97658 b will be a key target for coming space missions TESS, CHEOPS, PLATO, and also JWST, to characterize thoroughly its structure and atmosphere. [less ▲]Detailed reference viewed: 12 (4 ULg)