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See detailLa mise en abyme vidéoludique comme vecteur d’une immersion au second degré : une analyse du jeu The Stanley Parable
Barnabé, Fanny ULg; Dozo, Björn-Olav ULg

Conference (2015, January 16)

Par sa nature même, le jeu entretient avec la réflexivité une parenté certaine. En effet, pour qu’une situation ou un objet soit reconnu comme ludique par les participants, il est nécessaire que ces ... [more ▼]

Par sa nature même, le jeu entretient avec la réflexivité une parenté certaine. En effet, pour qu’une situation ou un objet soit reconnu comme ludique par les participants, il est nécessaire que ces derniers superposent à leur action le message « ceci est un jeu » (Bateson, 1977). L’acte ludique, le « jouer » (Henriot, 1989), constitue donc un procédé de « méta-communication » (Bateson, 1977) supposant une interaction au second degré avec le réel (le joueur « fait comme si » ; Schaeffer, 1999). Le jeu vidéo n’échappe pas à cette dynamique réflexive, comme en témoigne le nombre important d’œuvres vidéoludiques qui – par le biais de différents outils formels – discourent sur leur propre organisation ludo-narrative, sur leurs possibilités d’utilisation ou sur le médium qui les supporte. Envisageant la mise en abyme comme l’un des procédés réflexifs – parmi d’autres – dont peut user le jeu vidéo, la présente communication visera à étudier les particularités de cette forme de représentation liées à son inclusion dans un environnement ludique. La mise en abyme vidéoludique rompt-elle l’immersion du joueur, le « cercle magique » (Huizinga, 1950) ? Permet-elle l’élaboration d’un univers fictionnel cohérent malgré le fait qu’elle rappelle le joueur à son statut d’utilisateur ? A-t-elle nécessairement une vocation critique ou peut-elle constituer une fin en soi, un dispositif ludique à part entière ? Pour répondre à ces interrogations, nous nous intéresserons à un cas exemplaire de mise en abyme vidéoludique : le jeu The Stanley Parable. Celui-ci met en perspective l’action du joueur en lui faisant incarner le personnage de Stanley, dont le travail consiste à appuyer sur des boutons en suivant un ordre et une fréquence qui lui sont dictés par un ordinateur. Ce jeu d’aventure pousse la logique réflexive à un point tel (elle constitue son fondement ludique, narratif et esthétique) qu’il met en question sa force évocatrice et sa validité : l’accumulation des mises en abyme (reflétant l’expérience du joueur mais aussi l’histoire du jeu vidéo en général) empêche effectivement toute prise au sérieux du récit, tout investissement au premier degré. En multipliant les méta-énoncés, The Stanley Parable fait de la mise en abyme un système de règles en soi (un game) dont le principe ludique repose sur la manipulation des codes mêmes du jeu vidéo : le game designer y engage le joueur dans une lutte (un play) dont l’enjeu n’est autre que la maîtrise du langage vidéoludique. [less ▲]

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See detailThe Impact of Employee-Employer Relationships on Domestic Worker’s Achievement of Transnational Family-Work Balance
Vivas Romero, Maria ULg

Conference (2015, January 16)

While the average mainstream woman’s daily commute to work is 28 minutes, the ageing Peruvian domestic workers I have followed for the past year, crossed the Atlantic ocean 12 years ago for jobs in ... [more ▼]

While the average mainstream woman’s daily commute to work is 28 minutes, the ageing Peruvian domestic workers I have followed for the past year, crossed the Atlantic ocean 12 years ago for jobs in Europe’s capital. They found in Brussels the opportunity to be employed either in the informal or formal domestic sector while they continued to cope with their transnational obligations as spouses, daughters, and mothers. Transnational family and Global Care Chains literature have examined the consequences of migrant domestic workers’ double role as mothers and workers abroad. My contribution takes the discussion one step further and examines how, in spite of their disadvantaged position within the global division of labor, these women manage to informally negotiate a transnational family-work balance. My analysis, based on the life-stories of two ageing Peruvian women, suggests that domestic-workers’ success in their negotiations for transnational family-work balance simultaneously depends on three factors: 1- their gender, race, and class positioning within the migratory, care, and welfare regimes of sending and receiving states, 2- their ability to circulate familial care transnationally through the different stages in their life-course, 3- the business or personalized relationship that they established through their life-course with their employers. Furthermore, this analysis shows that employers are key actors in domestic workers’ negotiation, not only of a family-work balance, but also simply for social protection, especially in their old age. Finally, I suggest that the analysis of these complex employer-employee negotiations may allows us to see how these particular domestic workers are taking small steps to professionalize their work while paving the way to erase the historical vestiges associated with it. [less ▲]

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See detailUsages épistémologiques de la traduction chez W. V. O. Quine et M. Serres
Smette, Bernard ULg

Scientific conference (2015, January 16)

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See detailHYDRODYNAMICS IN A DISPOSABLE RECTANGULAR PARALLELEPIPED STIRRED BIOREACTOR WITH ELLIPTIC PENDULUM MOTION PADDLE
Collignon, Marie-Laure ULg; Droissart, Laurent; Delafosse, Angélique ULg et al

in Biochemical Engineering Journal (2015), 93

Stainless steel bioreactors increasingly fall behind to their disposable counterparts in pharma research as they do not require cleaning or sterilization. This led company ATMI LifeSciences to develop the ... [more ▼]

Stainless steel bioreactors increasingly fall behind to their disposable counterparts in pharma research as they do not require cleaning or sterilization. This led company ATMI LifeSciences to develop the “Nucleo™”. Original in design, this disposable bioreactor comprises a rectangular parallelepiped plastic bag stirred by a paddle revolving in elliptic pendulum motion. Studies covering this bioreactor showed good homogeneity of culture medium as well as good productivity for animal cell cultures. To further explain these good performances, the flow inside the “Nucleo™” had to be resolved. This paper focuses on the mean flow description, computed from stereo-PIV measurements performed in 20 verticals covering the whole volume of a 50 dm3 Nucleo™ bioreactor. As the flow is already turbulent in the chosen agitation conditions, its dimensionless mean velocity field does not vary with the paddle rotational speed. Mean flow pattern exhibits an axial symmetry – same flow is observed in opposite quarters of the tank – and can be described as a three-dimensional helix coiled on itself to form a distorted horizontal torus which covers the whole tank volume. Mean velocity value is on average doubled in the cone swept by the paddle, and its two horizontal components are twice higher than its vertical ones. However, mean velocity remains significant everywhere and, in particular, no stagnant area is observed in tank corners. Our results thus confirm previous studies observations. [less ▲]

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See detailLow molecular weight poly (2-dimethylamino ethylmethacrylate) polymers with controlled positioned fluorescent labeling: Synthesis, characterization and in vitro interaction with human endothelial cells.
Flebus, Luca ULg; Lombart, François ULg; Sevrin, Chantal et al

in International journal of pharmaceutics (2015), 478(1), 278-287

Poly (2-dimethylamino ethylmethacrylate) (PDMAEMA) is an attractive non-degradable polymer studied as nonviral vector for gene delivery but it can be also adopted for delivery of other biopharmaceutical ... [more ▼]

Poly (2-dimethylamino ethylmethacrylate) (PDMAEMA) is an attractive non-degradable polymer studied as nonviral vector for gene delivery but it can be also adopted for delivery of other biopharmaceutical drugs. As a parenteral carrier, the PDMAEMA free form (FF) might interact with tissues and cells. Few data are available on its selective internalization and efflux from cells, while the majority of studies published have followed the distribution of DNA complexed with PDMAEMA. In order to address polycation safety, the first aim was to synthesize by atom transfer radical polymerisation (ATRP) fluorescent labeled PDMAEMA of low molecular weight (Mw) (below 15kDa), controlling the position and density of fluorescein. The second goal was to analyze the possible difference in uptake and subcellular distribution of this labeled FF polycation between human umbilical vein endothelial cells (HUVEC) and hCMEC/D3 cells. These two cell lines have been chosen in order to detect selectivity towards the blood-brain barrier (BBB). In both cases, polycation was detected along the plasma membrane followed by progressive migration to the peri-nuclear region, where it overlapped with lysosomal structures. The analysis by fluorescence-activated cell sorting (FACS) of the PDMAEMA uptake by hCMEC/D3 cells showed a significant (p<0.05) inhibition (40%) in presence of 2-dexoxy-d-glucose inhibitor, a result supporting an energy-dependence mechanism(s). Cytotoxicity study showed that low Mw PDMAEMA (10kDa) lead to a minor cytotoxicity compared to the higher ones. As main conclusion this study highlights the similitude in cell trafficking of FF PDMAEMA and data previously reported for PDMAEMA/DNA complexes. [less ▲]

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See detailMiracle ou péril jaune? La pénétration chinoise en Amérique latine
Wintgens, Sophie ULg

Article for general public (2015)

Qu’elle fascine ou qu’elle rebute, qu’elle soit synonyme d’opportunités ou porteuse de défis, la Chine est aujourd’hui devenue un acteur incontournable des relations internationales. Deuxième économie ... [more ▼]

Qu’elle fascine ou qu’elle rebute, qu’elle soit synonyme d’opportunités ou porteuse de défis, la Chine est aujourd’hui devenue un acteur incontournable des relations internationales. Deuxième économie mondiale en passe de dépasser les États-Unis, la montée en puissance de cet État-continent qui représente à lui seul un cinquième de la population de la planète met dès lors la notion de pouvoir mondial en question. La Chine est-elle une puissance mondiale à même de concurrencer, voire détrôner, la domination américaine ? Qu’en est-il en particulier de sa pénétration récente en Amérique latine, une région du monde que les États-Unis considèrent historiquement comme leur arrière-cour et l’Union européenne (UE) comme une importante zone d’influence ? [less ▲]

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See detailEuthanasie et internement : une logique perverse ?
Englebert, Jérôme ULg

Article for general public (2015)

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See detailTransport et environnement
Ozer, Pierre ULg

Scientific conference (2015, January 15)

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See detailLe syndrome dysexécutif pour les nuls
Adam, Stéphane; SALMON, Eric ULg; GILLAIN, Sophie ULg et al

Conference (2015, January 15)

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See detailINTERNATIONAL WORKSHOP Employment relationships in migrant domestic work: a transnational perspective
Safuta, Anna; Camargo, Beatriz; Vivas Romero, Maria ULg

Scientific conference (2015, January 15)

Domestic work provided by migrants in private households, both formally and informally, has been on the agenda of researchers and policymakers since the early 2000s. Employment relationships between ... [more ▼]

Domestic work provided by migrants in private households, both formally and informally, has been on the agenda of researchers and policymakers since the early 2000s. Employment relationships between migrant workers and employers in this sector remain however underexplored, in particular in European contexts. Three aspects deserve further examination: the comparison between formal and informal settings, differences between childcare, elderly care and housework provision, as well as the links between inter-individual relations and policies. The main objective of this International Workshop is to open new perspectives in the study of employment relationships in domestic work, and to promote transnational and cross-disciplinary exchange between scholars studying the topic. This International Workshop featured keynote lectures by confirmed academics with expertise in migrant domestic work, followed by workshops open to early career researchers (PhD student-level and up). Theses workshops allowed selected participants to discuss papers submitted in advance with senior academics investigating domestic work, care and migration. The Workshop aimed to make the most of new methodological perspectives in the sociology of migration, promoting a transnational approach in the study of domestic work. The objective was also to bring employment relationships in migrant domestic work out of the shadow of the private sphere and allow discussion between academics specializing in this area of investigation. We welcomed researchers investigating both micro and macro aspects of migrant domestic work. Questions of interest included the personalization of the employment relationship between migrant domestic workers and private employers; differences between employment relations in housework, elderly care and childcare; as well as the influence on employment relationships of ‘otherness’ in the private space, of the formalization of employment and/or regularization of migratory status, and of different migratory and care regimes. Transnational perspectives are particularly welcome. This International Workshop was organized in the framework of the Social Sciences Thematic Doctoral School of the Wallonia-Brussels Federation – Program “Migrations and Interculturality” (École doctorale thématique en sciences sociales de la Fédération Wallonie-Bruxelles – Programme «Migrations et Interculturalité»), coordinated by Université libre de Bruxelles (ULB), Université catholique de Louvain (UCL) and Université de Liège (ULg). [less ▲]

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See detailFirst-light LBT Nulling Interferometric Observations: Warm Exozodiacal Dust Resolved within a Few AU of eta Crv
Defrere, D.; Hinz, P. M.; Skemer, A. J. et al

in Astrophysical Journal (2015), 799

We report on the first nulling interferometric observations with the Large Binocular Telescope Interferometer (LBTI), resolving the N' band (9.81-12.41 μm) emission around the nearby main-sequence star η ... [more ▼]

We report on the first nulling interferometric observations with the Large Binocular Telescope Interferometer (LBTI), resolving the N' band (9.81-12.41 μm) emission around the nearby main-sequence star η Crv (F2V, 1-2 Gyr). The measured source null depth amounts to 4.40% ± 0.35% over a field-of-view of 140 mas in radius (~2.6 AU for the distance of η Crv) and shows no significant variation over 35° of sky rotation. This relatively low null is unexpected given the total disk to star flux ratio measured by the Spitzer Infrared Spectrograph (IRS; ~23% across the N' band), suggesting that a significant fraction of the dust lies within the central nulled response of the LBTI (79 mas or 1.4 AU). Modeling of the warm disk shows that it cannot resemble a scaled version of the solar zodiacal cloud unless it is almost perpendicular to the outer disk imaged by Herschel. It is more likely that the inner and outer disks are coplanar and the warm dust is located at a distance of 0.5-1.0 AU, significantly closer than previously predicted by models of the IRS spectrum (~3 AU). The predicted disk sizes can be reconciled if the warm disk is not centrosymmetric, or if the dust particles are dominated by very small grains. Both possibilities hint that a recent collision has produced much of the dust. Finally, we discuss the implications for the presence of dust for the distance where the insolation is the same as Earth's (2.3 AU). [less ▲]

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See detailQuid des acquis culturels de nos élèves au sortir du secondaire ? Étude transversale (2002-2009)
Jadoulle, Jean-Louis ULg; Stevens, Xavier ULg

Scientific conference (2015, January 14)

La recherche dont il est fait état porte sur la culture historique scolaire. Quels sont les "savoirs culturels" à caractère historique des élèves de 6e année de l'enseignement secondaire général ? Quel ... [more ▼]

La recherche dont il est fait état porte sur la culture historique scolaire. Quels sont les "savoirs culturels" à caractère historique des élèves de 6e année de l'enseignement secondaire général ? Quel est leur niveau de maîtrise de ces savoirs ? Dans quelle mesure cette maîtrise dépend-t-elle de l'indice socio-économique moyen de l'école et de la filière d'enseignement qu'ils fréquentent ? Ou du profil de l'école ? Comment cette maîtrise a-t-elle évolué durant la période 2002-2009, soit celle au cours de laquelle les nouveaux programmes, inspirés de l'approche par compétences, ont été implémantés ? [less ▲]

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See detail(Tissue PET) Vascular metabolic imaging and peripheral plasma biomakers in the evolution of chronic arotic dissections
SAKALIHASAN, Natzi ULg; NIENABER, Christoph; HUSTINX, Roland ULg et al

in European Heart Journal - Cardiovascular Imaging (2015)

Enhanced FDG uptake may be considered as a complementary imaging marker associated with secondary complications in type B dissections. During follow-up, aneurysmal progression is related to PET/CT and ... [more ▼]

Enhanced FDG uptake may be considered as a complementary imaging marker associated with secondary complications in type B dissections. During follow-up, aneurysmal progression is related to PET/CT and biomarkers of thrombus renewal and lysis. [less ▲]

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See detailPolitiques d'éducation et de formation : une approche par les capacités
Orianne, Jean-François ULg

Scientific conference (2015, January 13)

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See detailIntroduction to item response theory (IRT) and computerized adaptive testing (CAT) with the R software
Magis, David ULg

Scientific conference (2015, January 13)

Item response theory (IRT) has become an important field of research for psychology and educational assessment. Recently, with the increase of computational power, several IRT-related topics have emerged ... [more ▼]

Item response theory (IRT) has become an important field of research for psychology and educational assessment. Recently, with the increase of computational power, several IRT-related topics have emerged, among others, computerized adaptive testing (CAT). The main aim of CAT is to provide a framework for individualized assessment by means of optimal item selection and administration to the test takers. CAT has several assets to linear (non-adaptive) testing: individualized assessment, limited risk of cheating or fraud, shorter tests providing the same amount of information as longer linear tests, automatic scoring and reporting at the end of the test. Practical use of CAT, however, remains limited so far due to several factors (lack of available large item banks, content validity and security, lack of suitable software for practical CAT assessment, ethical issues in administering different tests to estimate the same ability, etc.). The purpose of this workshop is threefold: (a) to provide a general overview of IRT and CAT, (b) to introduce the R software in a user-oriented way, as well as several IRT tools (including the package catR for CAT simulations), (c) to perform practical training sessions with the participants. The workshop will be a mix of oral presentations, demonstrations related to the R software, and practical sessions where participants will be invited to train with R and catR. The R software is an open-source platform for statistical inference and testing, graphical display and data visualization. It also holds several add-on packages for specific IRT purposes (item calibration, ability estimation, multidimensional scaling, equating, differential item functioning etc.). The R community is worldwide and proposes free exchanges of shared R packages through the CRAN (comprehensive R archive network). In this workshop, the R package catR will be examined and used in the practical sessions. [less ▲]

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See detailLes institutions politiques belges après la sixième Réforme de l'État
Grandjean, Geoffrey ULg

Learning material (2015)

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See detailTable ronde : quand évoquer une maladie du motoneurone ?
WANG, François-Charles ULg; TINANT, France ULg

Scientific conference (2015, January 13)

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See detailCOPPER LEACHING FROM WASTE ELECTRIC CABLES BY BIOHYDROMETALLURGY
Lambert, Fanny ULg; Bastin, David ULg; Gaydardzhiev, Stoyan ULg et al

in Minerals Engineering (2015)

This study examines the leaching of copper from waste electric cables by chemical leaching and leaching catalysed by Acidithiobacillus ferrooxidans in terms of leaching kinetics and reagents consumption ... [more ▼]

This study examines the leaching of copper from waste electric cables by chemical leaching and leaching catalysed by Acidithiobacillus ferrooxidans in terms of leaching kinetics and reagents consumption. Operational parameters such as the nature of the oxidant (Fe3+, O2), the initial ferric iron concentration (0-10 g/L) and the temperature (21-50°C) were identified to have an important influence on the degree of copper solubilisation. At optimal process conditions, copper extraction above 90% was achieved in both leaching systems, with a leaching duration of 1 day. The bacterial leaching system slightly outperformed the chemical one but the positive effect of regeneration of Fe3+ was limited. It appears that the Fe2+ bio-oxidation is not sufficiently optimised. Best results in terms of copper solubilisation kinetics were obtained for the abiotic test at 50°C and for the biotic test at 35°C. Moreover, the study showed that in same operating conditions, a lower acid consumption was recorded for the biotic test than for the abiotic test. [less ▲]

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