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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 detailNuclear Magnetic Resonance, Thermogravimetric and Differential Scanning Calorimetry for Monitoring Changes of Sponge Cakes During Storage at 20 °C and 65 % Relative Humidity
Botosoa, Eliot Patrick; Chèné, Christine; Blecker, Christophe ULg et al

in Food and Bioprocess Technology (2015), 8

This paper presents a study on sponge cakes produced at the pilot scale and monitored during ageing (i.e. 1, 3, 6, 9, 16 and 20 day(s)) by different analytical techniques: nuclear magnetic resonance (NMR ... [more ▼]

This paper presents a study on sponge cakes produced at the pilot scale and monitored during ageing (i.e. 1, 3, 6, 9, 16 and 20 day(s)) by different analytical techniques: nuclear magnetic resonance (NMR), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Results from NMR showed that the spin–lattice relaxation time (T1), measured on the crumb part, decreased from day 1 to day 16 while the spin–spin relaxation time (T2) increased throughout the whole storage time (i.e. 1 to 20 day(s)). Based on the analysis of the state of water, TGA allowed to establishing a kinetic profile of retrogradation degree of starch contained in sponge cakes. This approach evidenced that the evolution of the sponge cakes freshness and staling closely depends on the dynamic of the water in the crumb during ageing. These results were supported by DSC thermograms exhibiting a variation of three main endotherms detected in sponge cakes at −15, +5 and +45 °C throughout ageing. The enthalpy changes of these endotherms reflected the evolution of chemical and physical reactions occurring in the sponge cakes during storage. The analysis of the endotherm enthalpy change at 45 °C allowed to determine the time τ (i.e. τ≈9 days) corresponding to the apparition of amylopectin crystallites that could be considered as a reference time to separate fresh sponge cakes from the aged ones. [less ▲]

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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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See detailGrandeur et misère du système politique belge
Grandjean, Geoffrey ULg

Conference given outside the academic context (2015)

Detailed reference viewed: 14 (2 ULg)
See detailFeedback loops: From cellular to network principles
Dethier, Julie ULg

Scientific conference (2015, January 12)

Biological rhythms play a major role in the functioning of the brain. However, the generation mechanisms and functions of these rhythms are still under debate and the question of which cellular details ... [more ▼]

Biological rhythms play a major role in the functioning of the brain. However, the generation mechanisms and functions of these rhythms are still under debate and the question of which cellular details must be retained at the network level is largely open. In this presentation, I will highlight that cellular properties have a major impact at the network level, especially in the study of modulation and robustness. I will focus on a particular cellular property, a positive feedback loop in a specific timescale, and illustrate its network level impact with two simple examples: the modulation and robustness of an half-center oscillator, a very simple central pattern generator composed of two reciprocal-inhibitory populations, and the control of transient beta-band oscillations in the basal ganglia, a group of subcortical nuclei that act as a cohesive functional unit, in relation to motor movements. [less ▲]

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