Last 7 days
Bookmark and Share    
See detailL'inter-culturalité et le développement territorial à Verviers: entre polarisation et intégration
Martiniello, Marco ULiege

Scientific conference (2017, December 04)

Detailed reference viewed: 5 (0 ULiège)
Full Text
See detailLa Celestina, un mito literario hispánico (1822-2014)
Francois, Jeromine ULiege

Doctoral thesis (2017)

Detailed reference viewed: 28 (3 ULiège)
Full Text
See detailCitizen Science and its promotion at the European Commission Level: Toward a changing conception of public engagement
Macq, Hadrien ULiege; Tancoigne, Élise

Conference (2017, December 04)

Through this presentation, we analyse the justifications for the recent promotion of Citizen Science at the European Commission level. We also analyse the genesis of this emerging discourse on Citizen ... [more ▼]

Through this presentation, we analyse the justifications for the recent promotion of Citizen Science at the European Commission level. We also analyse the genesis of this emerging discourse on Citizen Science. We therefore link its promotion to previous forms of public engagement that have been promoted by the European Commission, and provide insights on the new conception of science-society relationship that is developing. [less ▲]

Detailed reference viewed: 41 (2 ULiège)
Full Text
See detail(Un)taming Citizen Science – Policies, Practices, People
Van Oudheusden, Michiel ULiege; Van Hoyweghen, Ine

Scientific conference (2017, December 04)

We are presently witnessing a global explosion of citizen science initiatives covering a wide range of topics, from counting hummingbirds to actively researching new medical treatments, to the use of ... [more ▼]

We are presently witnessing a global explosion of citizen science initiatives covering a wide range of topics, from counting hummingbirds to actively researching new medical treatments, to the use of smartphones to measuring radioactivity in the environment. European policymakers and societal stakeholders hail citizen science as a means of (re)building trust in science, which may in turn lead to “more democratic research based on evidence and informed decision-making” and more responsible innovation (Sanz et al. 2014). Others see it as a means of enabling citizens to become researchers, advocates, or watchdogs of science, or to become their own sensors and create their own expertise and communities, distinct from established organizations and practices. In this workshop, we explore these and related issues through the notion of ‘(un)taming,’ which refers to the mutual adjustment of technology and the social, and links to ‘domestication’ and domestication theory in science and technology studies (Latour, 1987; Callon, 1986; Williams et al. 2004). It allows us to highlight how citizen science is incorporated into science and other subsystems of society through a wide array of interrelated and unconnected mechanisms, programs and procedures, such as research and development processes, the fabrication of new technologies and systems (e.g. DIY technologies), science policy making, educational activities, science journalism, and contemporary art forms, among others. As these processes elicit both support and controversy, they evoke several significant questions as to how citizen science is changing the confines of science and citizenship in contemporary society: Who and what is citizen science (not) for? How is citizen science tamed, and why? Which citizen science forms are amenable to taming, which forms are not? How is citizen science made public or politicized? How is it professionalized? How is it promoted, and to what effects? How do citizen scientists engage with the above questions? How will citizen science fare in the years ahead? [less ▲]

Detailed reference viewed: 29 (1 ULiège)
See detailArtistes-paysans. Excursion sur les arts situés.
Hagelstein, Maud ULiege

Scientific conference (2017, December 04)

Le séminaire porte sur les arts situés. Question du lieu et de son importance pour le processus créatif. On voudrait valoriser, avec ce nouveau concept auquel il faut maintenant donner consistance, les ... [more ▼]

Le séminaire porte sur les arts situés. Question du lieu et de son importance pour le processus créatif. On voudrait valoriser, avec ce nouveau concept auquel il faut maintenant donner consistance, les formes artistiques qui assument – plutôt qu’elles ne camouflent – leur ancrage dans une situation socio-historique précise, dans un lieu particulier, et qui ont la modestie de raconter d’où elles viennent. Des formes et des expériences artistiques situées, ancrées, locales, et marginales en ce sens qu’elles ne prétendent pas à une pure autonomie (à une existence séparée de leur point d’ancrage), mais qu’elles conservent – en leurs contenus ou en leurs manières – un lien visible au lieu/site dont elles émergent. Il y a de multiples lieux névralgiques autour desquels s’organisent des formes alternatives de création. Il faudrait pouvoir identifier quelques-uns de ces lieux, observer les activités qu’ils génèrent ou qu’ils ont générées, et décrire les problèmes théoriques qu’ils engagent. Pourquoi certains endroits offriraient-ils des conditions privilégiées pour la création, ou plutôt : pourquoi certains lieux ont-ils produit plusieurs artistes de qualité, comme s’ils attiraient à eux du talent, comme s’ils brassaient presque naturellement du talent ? Dans le cas de l’art brut, on imagine quels sont ces lieux : l’asile, la prison, la cabane, l’atelier, etc. Il va de soi que l’internement dans un milieu psychiatrique n’est pas une condition nécessaire – ni même une condition suffisante – pour être devenir un créateur. Comme partout ailleurs, les œuvres de qualité font exception dans les ateliers psychiatriques ; elles sont noyées dans des productions moins stimulantes sur le plan artistique, parce que seulement occupationnelles ou thérapeutiques (en effet, l’intérêt premier de ces productions est souvent de constituer un matériel de diagnostic alternatif pour les psychiatres / elles permettent de vérifier l’adéquation de certaines manières de faire, de certaines manières de se reporter à l’espace et aux autres, à telle ou telle catégorie nosologique, et d’éprouver la validité du classement des maladies mentales). Malgré ces réserves (malgré donc le caractère d’exception de la découverte d’artistes parmi les pensionnaires des institutions), certains lieux ont néanmoins généré une activité artistique intense – et il semble important de se demander pourquoi. [less ▲]

Detailed reference viewed: 18 (0 ULiège)
Full Text
Peer Reviewed
See detailMaximizing neotissue growth kinetics in a perfusion bioreactor: An in silico strategy using model reduction and Bayesian optimization
Mehrian, Mohammad ULiege; Guyot, Y.; Papantoniou, I. et al

in Biotechnology and Bioengineering (2017)

In regenerative medicine, computer models describing bioreactor processes can assist in designing optimal process conditions leading to robust and economically viable products. In this study, we started ... [more ▼]

In regenerative medicine, computer models describing bioreactor processes can assist in designing optimal process conditions leading to robust and economically viable products. In this study, we started from a (3D) mechanistic model describing the growth of neotissue, comprised of cells, and extracellular matrix, in a perfusion bioreactor set-up influenced by the scaffold geometry, flow-induced shear stress, and a number of metabolic factors. Subsequently, we applied model reduction by reformulating the problem from a set of partial differential equations into a set of ordinary differential equations. Comparing the reduced model results to the mechanistic model results and to dedicated experimental results assesses the reduction step quality. The obtained homogenized model is 105 fold faster than the 3D version, allowing the application of rigorous optimization techniques. Bayesian optimization was applied to find the medium refreshment regime in terms of frequency and percentage of medium replaced that would maximize neotissue growth kinetics during 21 days of culture. The simulation results indicated that maximum neotissue growth will occur for a high frequency and medium replacement percentage, a finding that is corroborated by reports in the literature. This study demonstrates an in silico strategy for bioprocess optimization paying particular attention to the reduction of the associated computational cost. © 2017 Wiley Periodicals, Inc. [less ▲]

Detailed reference viewed: 2 (0 ULiège)
Full Text
See detailComment expliquer la féminisation de la profession de vétérinaire et quels en sont les enjeux ?
Gavray, Claire ULiege

Scientific conference (2017, December 02)

compréhension du phénomène de féminisation et de ses enjeux au départ d'une analyse historique et sociologique mobilisant les concept de genre

Detailed reference viewed: 9 (0 ULiège)
Full Text
See detailApport des Systèmes d’Information Géographique dans la définition d’aires d’activités humaines au Paléolithique moyen. Exemple du site de Caours (France)
Moreau, Gwénaëlle ULiege

Scientific conference (2017, December 02)

Communication autour de la méthodologie mise en place lors de mon doctorat.

Detailed reference viewed: 14 (0 ULiège)
Full Text
Peer Reviewed
See detailB stars seen at high resolution by XMM-Newton
Cazorla, Constantin ULiege; Nazé, Yaël ULiege

in Astronomy and Astrophysics (2017), 608(A54), 1-15

We report on the properties of 11 early B stars observed with gratings on board XMM-Newton and Chandra, thereby doubling the number of B stars analysed at high resolution. The spectra typically appear ... [more ▼]

We report on the properties of 11 early B stars observed with gratings on board XMM-Newton and Chandra, thereby doubling the number of B stars analysed at high resolution. The spectra typically appear soft, with temperatures of 0.2-0.6 keV, and moderately bright (log [L[SUB]X[/SUB]/L[SUB]BOL[/SUB]] -7) with lower values for later type stars. In line with previous studies, we also find an absence of circumstellar absorption, negligible line broadening, no line shift, and formation radii in the range 2-7 R[SUB]⋆[/SUB]. From the X-ray brightnesses, we derived the hot mass-loss rate for each of our targets and compared these values to predictions or values derived in the optical domain: in some cases, the hot fraction of the wind can be non-negligible. The derived X-ray abundances were compared to values obtained from the optical data, with a fair agreement found between them. Finally, half of the sample presents temporal variations, either in the long-term, short-term, or both. In particular, HD 44743 is found to be the second example of an X-ray pulsator, and we detect a flare-like activity in the binary HD 79351, which also displays a high-energy tail and one of the brightest X-ray emissions in the sample. Based on observations collected with the ESA science mission XMM-Newton, an ESA science mission with instruments and contributions directly funded by ESA member states and the USA (NASA). [less ▲]

Detailed reference viewed: 11 (0 ULiège)
Peer Reviewed
See detailLe moment d’apparition de la fatigue mentale varie-t-il en fonction de l’âge ? Détermination du Time-on-Task effect chez des jeunes, des middle-age, et des âgés.
Gilsoul, Jessica ULiege; Collette, Fabienne ULiege

Poster (2017, December 01)

Introduction. La fatigue mentale peut survenir chez des personnes jeunes après un certain temps de tâche (Time-on-Task effect). Wang et al. (2016) ont mis en évidence une augmentation des temps de ... [more ▼]

Introduction. La fatigue mentale peut survenir chez des personnes jeunes après un certain temps de tâche (Time-on-Task effect). Wang et al. (2016) ont mis en évidence une augmentation des temps de réaction de jeunes personnes entre les 40 premières et les 40 dernières minutes d’une tâche Stroop de 160min. Notre étude a pour but de répliquer les résultats de Wang et al. (2016) et de tester pour la première fois le Time-on-Task effect chez des middle-age et des âgés. Méthode. Vingt-et-un jeunes (MÂge=21,29), 16 middle-age (MÂge = 49,94), et 17 âgés (MÂge = 65,06) ont réalisé une tâche Stroop durant 160min. Celle-ci comprenait des items facilitateurs (FA), interférents (I), et neutres (NE), ces derniers apparaissant systématiquement un item sur deux. Les 160min. ont été divisées en huit blocs de 20min. avec élimination du Bloc 0 (Bloc d’habituation). Des ANOVAs 3(Groupe : Jeune, Middle-age, Âgé) X 7(Bloc : 1,…,7) à mesures répétées ont été réalisées sur les moyennes et les coefficients de variation (CV) des temps de réaction (TR) des trois types d’items. Résultats. Moyenne. Les jeunes montrent une augmentation de leur TR entre le 1er et le 5ème Bloc (p=,03) sur les items NE alors que cette augmentation survient lors du Bloc 4 pour les middle-age (p=,006) et les âgés (p=,04). CV. Les jeunes montrent une augmentation de leur CV entre le Bloc 1 et le bloc 7 (p=,002) sur les items NE alors que celle-ci survient lors du Bloc 6 pour les middle-age (p=,02). En revanche, le CV des âgés ne varie pas en fonction des blocs. Discussion. La fatigue mentale mesurée grâce au Time-on-Task dans le vieillissement semble se manifester par un ralentissement général du traitement de l’information à mesure de l’avancée sur la tâche : les middle-age et les âgés étant plus précocement fatigués que les sujets jeunes. En revanche, alors que les jeunes et les middle-age semblent affectés au niveau de leur CV, le vieillissement plus avancé semble préserver la variabilité intra-individuelle du Time-on-Task. De façon intéressante, alors que les items FA et I semblent moins sensibles à la fatigue mentale, les trois groupes ont montré un ralentissement significatif de leur vitesse sur les items NE à mesure du Time-on-Task. Etant donné la prévisibilité des NE dans notre paradigme, nous faisons l’hypothèse que la fatigue mentale survient plus facilement lorsque l’individu peut systématiquement anticiper l’information à traiter, le menant à un désengagement de la tâche. [less ▲]

Detailed reference viewed: 17 (1 ULiège)
Full Text
Peer Reviewed
See detailDetermination of phenolic organohalogens in human serum from a Belgian population and assessment of parameters affecting the human contamination
Dufour, Patrice ULiege; PIRARD, Catherine ULiege; CHARLIER, Corinne ULiege

in Science of the Total Environment (2017), 599-600

Many in vitro or in vivo studies highlighted the potential deleterious effects of phenolic organohalogenated compounds (POHs) on the health, particularly on the thyroid system homeostasis, however few ... [more ▼]

Many in vitro or in vivo studies highlighted the potential deleterious effects of phenolic organohalogenated compounds (POHs) on the health, particularly on the thyroid system homeostasis, however few large scale human epidemiological studies have been carried out, especially in Europe. Further studies monitoring the human contamination by POHs, the sources of exposure and the influence of these compounds on thyroid health are still needed. Therefore we determined the concentrations of 16 POHs (pentachlorophenol (PCP), tetrabromobisphenol A (TBBPA), 4 bromophenols (BPs), 3 hydroxy-polybromodiphenylethers (OH-PBDEs) and 7 hydroxy-polychlorobiphenyls (OH-PCBs)) in serum from 274 people aged from 18 to 76 years old living in Liege (Belgium) and the surrounding area. A questionnaire about their alimentary habits, life style and home environment was also administered to the volunteers. The predominant compound measured in the population was PCP (median concentration of 593.0 pg mL−1). 4-OH-CB 107, 4-OH-CB 146 and 4-OH-CB 187 were detected in all samples and contributed for 75% of the sum of OH-PCBs (ΣOH-PCBs). The median measured in our population for ΣOH-PCBs was 143.7 pg mL−1. TBBPA and 2,4,6-tribromophenol were detected in 31% and 63.8% of the samples respectively while the detection frequency observed for the other BPs and the OH-PBDEs was close to zero. We computed multivariate regression models in order to assess the influence of demographic and lifestyle parameters on the PCP and ΣOH-PCBs contamination levels. Significant correlation was found between the PCP concentration and sex, smoker status, sea fish consumption and level of education, although the model seemed to be a poor (R2 = 0.14) predictor of the PCP concentration. The model computed for ΣOHPCBs was more explanatory (R2 = 0.61) and involved age, BMI and sea fish consumption. Finally, we assessed the parameters affecting the ΣOH-PCBs/ΣPCBs ratio. The model proposed involved age, BMI, smoker status and parent PCB level, and explained 41% of the variability of the ΣOH-PCBs/ΣPCBs ratio. [less ▲]

Detailed reference viewed: 22 (7 ULiège)
Full Text
See detaille genre en action dans les mécanismes de demande et d'offre de travail à temps partiel et au niveau de la réforme des pensions
Gavray, Claire ULiege

Conference (2017, December 01)

focus sur le genre en action dans la distribution des emplois, des revenus et des sécurités, notamment en matière de pension (discussion autour des mécanismes matériels et symboliques)

Detailed reference viewed: 10 (0 ULiège)
Full Text
See detailRegards sur l'Albanie: comprendre l'histoire de l'Albanie et les liens qui unissent les Albanais et la Belgique
Lika, Liridon ULiege

Scientific conference (2017, December 01)

Detailed reference viewed: 19 (0 ULiège)
Full Text
Peer Reviewed
See detailThe LBTI Fizeau imager - I. Fundamental gain in high-contrast imaging
Patru, F.; Esposito, S.; Puglisi, A. et al

in Monthly Notices of the Royal Astronomical Society (2017), 472

We show by numerical simulations a fundamental gain in contrast when combining coherently monochromatic light from two adaptive optics (AO) telescopes instead of using a single stand-alone AO telescope ... [more ▼]

We show by numerical simulations a fundamental gain in contrast when combining coherently monochromatic light from two adaptive optics (AO) telescopes instead of using a single stand-alone AO telescope, assuming efficient control and acquisition systems at high speed. A contrast gain map is defined as the normalized point spread functions (PSFs) ratio of a single Large Binocular Telescope (LBT) aperture over the dual Large Binocular Telescope Interferometer (LBTI) aperture in Fizeau mode. The global gain averaged across the AO-corrected field of view is improved by a factor of 2 in contrast in long exposures and by a factor of 10 in contrast in short exposures (i.e. in exposures, respectively, longer or shorter than the coherence time). The fringed speckle halo in short exposures contains not only high-angular resolution information, as stated by speckle imaging and speckle interferometry, but also high-contrast imaging information. A high-gain zone is further produced in the valleys of the PSF formed by the dark Airy rings and/or the dark fringes. Earth rotation allows us to exploit various areas in the contrast gain map. A huge-contrast gain in narrow zones can be achieved when both a dark fringe and a dark ring overlap on to an exoplanet. Compared to a single 8-m LBT aperture, the 23-m LBTI Fizeau imager can provide a gain in sensitivity (by a factor of 4), a gain in angular resolution (by a factor of 3) and, as well, a gain in raw contrast (by a factor of 2-1000 varying over the AO-corrected field of view). [less ▲]

Detailed reference viewed: 24 (5 ULiège)
Full Text
Peer Reviewed
See detailLe droit de l’Union européenne face à l’économie collaborative
Van Cleynenbreugel, Pieter ULiege

in Revue Trimestrielle de Droit Européen (2017), (4), 697-722

La présente contribution a pour objectif de proposer un état de lieux de l’incidence du droit de l’Union européenne sur le développement, la promotion et la règlementation de l’économie collaborative au ... [more ▼]

La présente contribution a pour objectif de proposer un état de lieux de l’incidence du droit de l’Union européenne sur le développement, la promotion et la règlementation de l’économie collaborative au sein du marché intérieur. Pour ce faire, cet article se divise en deux parties. Dans la première partie, le phénomène de l’économie collaborative ainsi que les approches réglementaires envisagées par les institutions de l’Union européenne pour mieux encadrer cette économie seront analysés. Nous soulignerons que l’Union européenne décide pour l’instant de ne pas proposer de nouveaux instruments de réglementation, préférant plutôt interpréter les instruments et dispositions déjà existants du droit de l’Union européenne. S’inscrivant dans cette approche, la deuxième partie de la contribution dressera une cartographie des dispositions pertinentes du droit de l’Union européenne qui gouvernent l’économie collaborative, en proposant des lignes directrices supplémentaires qui devraient permettre d’encore mieux intégrer l’économie collaborative dans le cadre juridique de l’Union européenne. [less ▲]

Detailed reference viewed: 78 (18 ULiège)
Full Text
Peer Reviewed
See detailThe LBTI Fizeau imager – II. Sensitivity of the PSF and the MTF to adaptive optics errors and to piston errors
Patru, F.; Esposito, S.; Puglisi, A. et al

in Monthly Notices of the Royal Astronomical Society (2017), 472

We show numerical simulations with monochromatic light in the visible for the LBTI Fizeau imager, including opto-dynamical aberrations due here to adaptive optics (AO) errors and to differential piston ... [more ▼]

We show numerical simulations with monochromatic light in the visible for the LBTI Fizeau imager, including opto-dynamical aberrations due here to adaptive optics (AO) errors and to differential piston fluctuations, while other errors have been neglected. The achievable Strehl by the LBTI using two AO is close to the Strehl provided by a single standalone AO system, as long as other differential wavefront errors are mitigated. The LBTI Fizeau imager is primarily limited by the AO performance and by the differential piston/tip–tilt errors. Snapshots retain high-angular resolution and high-contrast imaging information by freezing the fringes against piston errors. Several merit functions have been critically evaluated in order to characterize point spread functions and the modulation transfer functions for high-contrast imaging applications. The LBTI Fizeau mode can provide an image quality suitable for standard science cases (i.e. a Strehl above 70 per cent) by performing both at a time: an AO correction better than ≈λ/18 RMS for both short and long exposures, and a piston correction better than ≈λ/8 RMS for long exposures or simply below the coherence length for short exposures. Such results, which can be applied to any observing wavelength, suggest that AO and piston control at the LBTI would already improve the contrast at near- and mid-infrared wavelengths. Therefore, the LBTI Fizeau imager can be used for high-contrast imaging, providing a high-Strehl regime (by both AO systems), a cophasing mode (by a fringe tracker) and a burst mode (by a fast camera) to record fringed speckles in short exposures. [less ▲]

Detailed reference viewed: 18 (1 ULiège)
See detailEnzensberger/Kursbuch : jeux de construction franco-allemande
Cormann, Grégory ULiege

Scientific conference (2017, December 01)

Detailed reference viewed: 14 (1 ULiège)