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See detailScrutin proportionnel scrutin majoritaire
Verjans, Pierre ULg; Matagne, Geoffroy ULg; Counet, Maxime ULg

in Politique revue belge d'analyse et de débats (2017), 98-99

Le scrutin proportionnel utilisé en Belgique produit des gouvernements de coalition où la recherche du compromis et du consensus est obligatoire tandis que le scrutin majoritaire utilisé en France produit ... [more ▼]

Le scrutin proportionnel utilisé en Belgique produit des gouvernements de coalition où la recherche du compromis et du consensus est obligatoire tandis que le scrutin majoritaire utilisé en France produit des gouvernements monopartisans qui tentent de transformer leur société par des mesures non négociées. Chaque mode de sélection a ses avantages. [less ▲]

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See detailRendre compte de la société d’aujourd’hui
Quoilin, Cécile; Postula, Jean-Louis ULg

in Cahiers de muséologie - Dans la marge (2017)

Founded a century ago as a classical museum of regional ethnography, the Museum of Walloon Life is now facing the challenge of an essential update and the redefinition of its museum project. For about ten ... [more ▼]

Founded a century ago as a classical museum of regional ethnography, the Museum of Walloon Life is now facing the challenge of an essential update and the redefinition of its museum project. For about ten years, the choice of the approach known as "society museum" on the occasion of the total renovation of the building, led to an in-depth review of the acquisition and exhibition policies but also of the nature of field research and relationships with its different audiences. This article shows the practical consequences of the implementation of this new model, which now places the man rather than the collections at the center of discourse, on all museum functions. One of its fundamental objectives is to allow the development within the Museum of the sometimes complex issues of contemporary society. [less ▲]

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See detailPosidonies : Lire dans les prairies sous-marines
Abadie, Arnaud ULg; Gobert, Sylvie ULg; Pergent, Gérard

Article for general public (2017)

Les “feuilles” qui s’amoncèlent sur les plages de Méditerranée sont le souvenir échoué des luxuriantes prairies sous-marines qui tapissent les fonds. C’est un écosystème fragile dont dépend un grand ... [more ▼]

Les “feuilles” qui s’amoncèlent sur les plages de Méditerranée sont le souvenir échoué des luxuriantes prairies sous-marines qui tapissent les fonds. C’est un écosystème fragile dont dépend un grand nombre d’espèces : les chercheurs doivent apprendre à “lire” les fonds pour identifier les menaces qui pèsent sur la posidonie. [less ▲]

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See detailLaos, Demos, Ethnos. Le peuple a bon dos
Jacquemain, Marc ULg

Article for general public (2017)

Si le républicanisme français est si obsédé par le "visible" et "l'invisible" dans l'espace public, c'est parce qu'il confond l'universalisme idéal de sa devise et le particularisme de ses pratiques ... [more ▼]

Si le républicanisme français est si obsédé par le "visible" et "l'invisible" dans l'espace public, c'est parce qu'il confond l'universalisme idéal de sa devise et le particularisme de ses pratiques réelles. La critique s'inspire de celle de Cécile Laborde dans "Critical Republicanism". [less ▲]

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See detailEvaluation of different in vitro dissolution tests based on level A in vitro–in vivo correlations for fenofibrate self-emulsifying lipid-based formulations
Pestieau, Aude ULg; Lebrun, Sonia; Cahay, Bernard et al

in European Journal of Pharmaceutics & Biopharmaceutics (2017), 112

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See detailImmunomodulatory effects of rapamycin in xenogeneic Graft versus Host Disease
Ehx, Grégory ULg; Hannon, Muriel ULg; DUBOIS, Sophie ULg et al

in Biology of Blood and Marrow Transplantation (2017, March), 23(3), 365366

Graft-versus-host disease (GVHD) remains a major cause of morbidity and mortality after allogeneic hematopoietic stem cell transplantation. Several studies have suggested that rapamycin (RAPA), an mTOR ... [more ▼]

Graft-versus-host disease (GVHD) remains a major cause of morbidity and mortality after allogeneic hematopoietic stem cell transplantation. Several studies have suggested that rapamycin (RAPA), an mTOR inhibitor with immunosuppressive properties, may reduce GVHD severity and mortality, possibly by promoting regulatory T cells (Tregs). However, few data have been reported about the impact of this drug on overall T cell population. The present work aims at investigating the mechanisms by which RAPA impacts GVHD in a humanized mouse model of GVHD (NSG mice infused with human PBMCs). We observed that RAPA injections significantly reduced xenogeneic GVHD lethality and severity. RAPA dramatically reduced human cells chimerism in RAPA mice and increased CD4+/CD8+ T cells balance due to a lower proliferation of CD8+ T cells. In addition, the frequencies of naive CD4+ and CD8+ T cells were higher and the CD4+ T cells showed a reduced effector phenotype (CD45RO+CD27-). Further, the differentiation of helper T cells (Th1, Th2 and Th17) was significantly decreased in treated mice. Tregs were positively affected as RAPA up-regulated their expression of BCL-2 and KI67 as well as their STAT5 phosphorylation level, leading to higher Treg frequency in treated mice. Altogether these data suggest that RAPA ameliorates GVHD by lowering cytotoxic and effector CD4+ T cells frequency as well as promoting Tregs. [less ▲]

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See detailEtude de la composition chimique et de l’activité antioxydante des différents extraits de la Lavande dentée (Lavandula dentata)
Bettaieb Rebey, I.; Bourgou, S.; Saidani Tounsi, M. et al

in Journal of New Sciences Agri & Biotech (2017), 39(2), 2096-2105

In this study, Lavandula dentata organs (roots, stems and leaves) were investigated for their essential oils, total phenolics, flavonoids contents and antioxidant activities. Essential oil yields were 0 ... [more ▼]

In this study, Lavandula dentata organs (roots, stems and leaves) were investigated for their essential oils, total phenolics, flavonoids contents and antioxidant activities. Essential oil yields were 0.22% in roots, 0.68 % in stems and 0.89 % in flowers. Major components of the oils were β-ocimene, limonene and 1,8 cineol in roots, stems and leaves and flowers, respectively. In all organs, total phenolics content ranged from 42.57 to 16.17 mg gallic acid equivalents per gram of dry weight (mg GAE/g DW).The antioxidant activities of Lavandula dentata extracts obtained from the three organs were assessed using two tests (DPPH and reducing power). The root extract was strongly effective as DPPH radical scavenger and reducing agent. Thus, the identification of individual target polyphenolic compounds of roots was performed by RP-HPLC. The major phenolic compound detected in roots was rosmarinic acid. This activity was high enough for the plant to be a new and natural source of strongly antioxidant substances for use as natural additives in food and pharmaceutical industry. [less ▲]

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See detailConstraining the efficiency of angular momentum transport with asteroseismology of red giants: the effect of stellar mass
Eggenberger, P.; Lagarde, N.; Miglio, A. et al

in Astronomy and Astrophysics (2017), 599

Context: Constraints on the internal rotation of red giants are now available thanks to asteroseismic observations. Preliminary comparisons with rotating stellar models indicate that an undetermined ... [more ▼]

Context: Constraints on the internal rotation of red giants are now available thanks to asteroseismic observations. Preliminary comparisons with rotating stellar models indicate that an undetermined additional process for the internal transport of angular momentum is required in addition to purely hydrodynamic processes. Aims: We investigate how asteroseismic measurements of red giants can help us characterize the additional transport mechanism. Methods: We first determine the efficiency of the missing transport mechanism for the low-mass red giant KIC 7341231 by computing rotating models that include an additional viscosity corresponding to this process. We then discuss the change in the efficiency of this transport of angular momentum with the mass, metallicity and evolutionary stage. Results: In the case of the low-mass red giant KIC 7341231, we find that the viscosity corresponding to the additional mechanism is constrained to the range 1 x 10^3 - 1.3 x 10^4 cm^2/s. This constraint on the efficiency of the unknown additional transport mechanism during the post-main sequence is obtained independently of any specific assumption about the modelling of rotational effects during the pre-main sequence and the main sequence (in particular, the braking of the surface by magnetized winds and the efficiency of the internal transport of angular momentum before the post-main-sequence phase). When we assume that the additional transport mechanism is at work during the whole evolution of the star together with a solar-calibrated braking of the surface by magnetized winds, the range of nu_add is reduced to 1 - 4 x 10^3 cm^2/s. In addition to being sensitive to the evolutionary stage of the star, we show that the efficiency of the unknown process for internal transport of angular momentum increases with the stellar mass. [less ▲]

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See detailComment les vidéastes gagnent-ils leur vie sur Youtube ?
Krywicki, Boris ULg

in Culture, le Magazine Culturel de l'Université de Liège (2017)

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See detailAnalyse de l’impact social des IDESS
Vanmeerbeek, Perrine ULg; Fallon, Catherine ULg; Italiano, Patrick ULg et al

Report (2017)

Ce rapport présente les résultats de recherche d'une analyse de l'impact social et des externalités positives des Initiatives de Développement de l'Emploi dans le secteur des Services de Proximité à ... [more ▼]

Ce rapport présente les résultats de recherche d'une analyse de l'impact social et des externalités positives des Initiatives de Développement de l'Emploi dans le secteur des Services de Proximité à finalité Sociale (IDESS). Les IDESS ont un double objectif : l'aide sociale à une population précarisée, et l'insertion socioprofessionnel de personnes éloignées du monde de l'emploi. Trois modèles-types de fonctionnement des IDESS sont développés dans ce rapport, et permettent d'appréhender à la fois les objectifs, les logiques d'action, et les impacts des IDESS. [less ▲]

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See detailValidation of SAFIR through DIN EN 1992-1-2 NA: Comparison of the results for the examples presented in Annex CC
Romeiro Ferreira, Joao Daniel ULg; Franssen, Jean-Marc ULg; Gernay, Thomas ULg

Report (2017)

Annex CC of DIN EN 1992-1-2 NA presents a series of cases that allow benchmarking software tools aimed at the design of structures in a fire situation. With the goal of providing a validation document for ... [more ▼]

Annex CC of DIN EN 1992-1-2 NA presents a series of cases that allow benchmarking software tools aimed at the design of structures in a fire situation. With the goal of providing a validation document for the finite element code SAFIR, a comparison of the reference results for the cases presented in the Annex CC with the results obtained with SAFIR has been carried out and is presented in this document. The validation typically consists in a comparison between the value of a result (temperature, displacement or others) obtained by SAFIR and the value given as a reference and supposed to be the « true » result. The value obtained must fall in the interval stipulated by the document. The parametric analysis shows that the solution of SAFIR satisfies the requirement of the standard. The solution converges to the theoretical solution when the density of the mesh is increased and the value of the time step is reduced. When refining the mesh, rectangular elements converge slightly faster than triangular element; regular structured meshes are most efficient, with slight differences being observed in distorted structured meshes; unstructured meshes are somehow less efficient while being still in the acceptable range of the standard. [less ▲]

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See detailChris BEARD - The Prince of the Blues
Sacré, Robert ULg

E-print/Working paper (2017)

Interview de Chris BEARD + record reviews

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See detailAccurate Control of 17beta-Estradiol Long-Term Release Increases Reliability and Reproducibility of Preclinical Animal Studies.
Gérard, Céline ULg; Gallez, Anne ULg; Dubois, Charline ULg et al

in Journal of Mammary Gland Biology & Neoplasia (2017), 22(1), 1-11

Estrogens are the subject of intensive researches aiming to elucidate their mechanism of action on the various tissues they target and especially on mammary gland and breast cancer. The use of ready-to ... [more ▼]

Estrogens are the subject of intensive researches aiming to elucidate their mechanism of action on the various tissues they target and especially on mammary gland and breast cancer. The use of ready-to-use slow releasing devices to administer steroids, especially estrogens, to small experimental animals remains the method of choice in terms of animal well-being and of safety for both the researcher and the animal. In this study, we evaluated and compared, in vitro and in vivo, the release kinetic of estradiol (E2) over sixty days from two different slow-releasing systems: the matrix pellet (MP) and the reservoir implant (RI). We compared the impact of these systems in three E2-sensitive mouse models : mammary gland development, human MCF7 adenocarcinoma xenograft and mouse melanoma progression. The real amount of E2 that is released from both types of devices could differ from manufacturer specifications due to inadequate release for MP and initial burst effect for RI. Compared to MP, the interindividual variability was reduced with RI thanks to a superior control of the E2 release. Depending on the dose-dependent sensitivity of the physiological or pathological readout studied, this could lead to an improvement of the statistical power of in vivo experiments and thus to a reduction of the required animal number. Altogether, our data draw attention on the importance to adequately select the slow-releasing device that is the most appropriated to a specific experiment to better fulfill the 3Rs rule (Replacement, Reduction, Refinement) related to animal welfare and protection. [less ▲]

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See detail« Traitement fiscal des dividendes – Fiscalité européenne et droit comparé »
Richelle, Isabelle ULg; Malherbe, Jacques

in Annunziata, Filippo (Ed.) Le droit comparé des affaires au XXIème siècle – Mélanges à la mémoire de Claude Ducouloux (2017)

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See detailOrigin of the Counterintuitive Dynamic Charge in the Transition Metal Dichalcogenides
Pike, Nicholas ULg; Dewandre, Antoine ULg; Van Troeye, Benoit et al

Scientific conference (2017, March)

Our recent first-principles calculations of the electronic and vibrational properties of the hexagonal transition-metal dichalcogenides reveal that their Born effective charges display a counterintuitive ... [more ▼]

Our recent first-principles calculations of the electronic and vibrational properties of the hexagonal transition-metal dichalcogenides reveal that their Born effective charges display a counterintuitive sign when compared to most other materials or transition-metal dichalcogenides with trigonal symmetry. We determine the origin of this counterintuitive sign by calculating the electronic, vibrational, and optical properties of these systems. We show that the sign of the Born effective charge is directly related to the electric field response of the electronic density, and, in turn, to the bonding characteristics of the material.There is a filled anti-bonding molecular orbital at the Fermi level, which is localized on the transition-metal atom and corresponds to a form of solid state $\pi$ back-bonding in these material. We propose a method of determining if other materials display a similar counterintuitive sign, based on their bonding characteristics, and propose experiments which could measure the sign of the Born effective charge using different spectroscopies. [less ▲]

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See detailFlux penetration in a superconducting film partially capped with a conducting layer
Brisbois, Jérémy ULg; Gladilin, V. N.; Tempere, J. et al

in Physical Review B (2017), 95

The influence of a conducting layer on the magnetic flux penetration in a superconducting Nb film is studied by magneto-optical imaging. The metallic layer partially covering the superconductor provides ... [more ▼]

The influence of a conducting layer on the magnetic flux penetration in a superconducting Nb film is studied by magneto-optical imaging. The metallic layer partially covering the superconductor provides an additional velocity-dependent damping mechanism for the flux motion that helps protecting the superconducting state when thermomagnetic instabilities develop. If the flux advances with a velocity slower than w = 2/µ0σt, where σ is the cap layer conductivity and t is its thickness, the flux penetration remains unaffected, whereas for incoming flux moving faster than w, the metallic layer becomes an active screening shield. When the metallic layer is replaced by a perfect conductor, it is expected that the flux braking effect will occur for all flux velocities. We demonstrate this effect by investigating Nb samples with a thickness step. Some of the observed features, namely the deflection and the branching of the flux trajectories at the border of the thick centre, as well as the favoured flux penetration at the indentation, are reproduced by time-dependent Ginzburg-Landau simulations. [less ▲]

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See detailExperimental Correction of Radiation Patterns Between Electromagnetic Environments
Spirlet, Maxime ULg; Geuzaine, Christophe ULg; Beauvois, Véronique ULg

in IEEE Transactions on Antennas & Propagation (2017), 65(03),

This manuscript presents an experimental method to estimate a radiation pattern obtained in a particular echoic environment (for example from in-situ measurements) as if measurements were performed in a ... [more ▼]

This manuscript presents an experimental method to estimate a radiation pattern obtained in a particular echoic environment (for example from in-situ measurements) as if measurements were performed in a given anechoic chamber. The correction is achieved using some reference measurements collected both in echoic and anechoic environments. An angular transfer function is estimated from these two sets of measurements and deconvolved from the measured radiation pattern to be corrected. [less ▲]

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See detailDe l’information (légale) à l'action (illégale) : Tests génétiques et technologies de pouvoir
Fallon, Catherine ULg

in Revue de la Faculté de Droit de l'Université de Liège (2017)

sur la base de l’étude des transformations technologiques récentes en matière de tests génétiques prénataux, ce texte propose une analyse comparée de l’évolution de ces dispositifs et des pratiques en ... [more ▼]

sur la base de l’étude des transformations technologiques récentes en matière de tests génétiques prénataux, ce texte propose une analyse comparée de l’évolution de ces dispositifs et des pratiques en Belgique et en Argentine. Les mêmes techniques et les mêmes connaissances sont disponibles dans les deux pays, que ce soit en matière de dépistage prénatal ou d’avortement médicamenteux, mais les conditions normatives, économiques, sociales et culturelles sont très différentes dans les deux pays. La prise en charge par les programmes publics médicaux assure un suivi « émancipateur » aux couples belges pendant la grossesse. En Argentine, où le recours à l'avortement légal est très restrictif, le dispositif public de dépistage prénatal reste inachevé. Dans les deux pays, il est possible de comparer comment ces dispositifs de « biopolitique » sont transformés par les innovations technologiques au niveau des réseaux de savoir et des relations de pouvoir entre l’état, le corps médical et les familles. Dans un tel cadre, la question de l’illégalité est moins centrale que l’étude de la normativité émergente [less ▲]

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