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See detailEstimation des paramètres d’item et de sujet à partir du modèle de Rasch : une étude comparative des logiciels BILOG-MG, ICL et R
Béland, Sébastien; Magis, David ULg; Raîche, Gilles

in Mesure et Evaluation en Education [=MEE] (in press)

La théorie de la réponse aux items (TRI) est une classe de modèles de mesure très utilisée en éducation. À ce jour, de nombreux logiciels, tel BILOG-MG, sont disponibles afin de procéder à l'estimation ... [more ▼]

La théorie de la réponse aux items (TRI) est une classe de modèles de mesure très utilisée en éducation. À ce jour, de nombreux logiciels, tel BILOG-MG, sont disponibles afin de procéder à l'estimation des paramètres d'item et de sujet. Parmi ces logiciels, il ne faut pas négliger ICL et R, qui sont gratuits et qui peuvent permettre de produire des analyses diversifiées. Cette étude a pour objectif de comparer la qualité d’estimation des paramètres selon une des modélisations issues de la TRI : le modèle de Rasch. Pour ce faire, nous comparons les estimateurs du paramètre de difficulté et de sujet selon trois logiciels : BILOG-MG, ICL et la librairie ltm disponible dans le logiciel R. Nous procédons à une analyse par simulation informatique et, dans un second temps, nous analysons un test de classement en anglais, langue seconde. Les résultats démontrent que les logiciels étudiés permettent d’obtenir des estimateurs des paramètres similaires, la différence principale entre ces logiciels étant leur temps d’exécution des procédures d’estimation. [less ▲]

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See detailPERK IS REQUIRED AT THE ER-TO-MITOCHONDRIA CONTACT SITES TO CONVEY APOPTOSIS FOLLOWING ROS-MEDIATED ER STRESS
VERFAILLIE, T; RUBIO, N; GARG, A et al

in Cell Death & Differentiation (in press)

Detailed reference viewed: 17 (4 ULg)
See detailQuartiere non è un quartiere : Racconto con foto quasi immaginarie
Curreri, Luciano ULg

Book published by Amos (in press)

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See detailLes enjeux financiers et budgétaires
Husson, Jean-François ULg

in Christians, Louis-Léon; Déom, Liliane (Eds.) Le régime des cultes en Région de Bruxelles-Capitale. Approches interdisciplinaires (in press)

This chapter deals with the public financing or religious and philosophical communities in Brussels-Capital Region. It treats methodological problems, financing issues for the stakeholders and details the ... [more ▼]

This chapter deals with the public financing or religious and philosophical communities in Brussels-Capital Region. It treats methodological problems, financing issues for the stakeholders and details the financing (legal base, amounts, beneficiaries). The analysis discusses financing and practice, financing and territorial limits, efficiency, effectiveness and legitimacy. [less ▲]

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See detailMEASUREMENT OF SERUM ALBUMIN BY PROTEIN ELECTROPHORESIS AND BROMOCRESOL GREEN METHODS IN CANINE AND EQUINE PATIENTS
Ramery, Eve ULg; Bureau, Fabrice ULg

in Veterinary Clinical Pathology (in press)

Background: Bromocresol green method (BCG) is routinely used in veterinary laboratories to measure albumin. A good agreement between BCG and electrophoresis (SPE) in healthy domestic animals is reported ... [more ▼]

Background: Bromocresol green method (BCG) is routinely used in veterinary laboratories to measure albumin. A good agreement between BCG and electrophoresis (SPE) in healthy domestic animals is reported. However, in human medicine, at low albumin and high globulin concentrations, BCG also binds to α- and β-globulins fractions. Surprisingly, there is no recent literature evaluating the BCG method in diseased domestic animals. Objective: The purpose of the present study was therefore to compare the serum albumin values obtained by SPE and BCG in canine and equine patients. Methods: Albumin measured by BCG and SPE was compared in the serum from 30 canine and 30 equine patients. Results: Good correlation was found (Spearman´s rho rs = 0.91 in dogs and 0.84 in horses). However, Altman and Bland analysis of results showed a positive bias of BCG with SPE (3.41 g/l in horses and 0.41 g/l in dogs) that increased when only hypoalbuminemic patients were considered (4.17 g/l in horses and 1.31 g/l in dogs). Conclusion: Results confirm that, despite good correlation, BCG method tends to overestimate albumin, especially in hypoalbuminemic patients. This is particularly evident in horses. [less ▲]

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See detailModel Predictive Control of Voltages in Active Distribution Networks
Valverde Mora, Gustavo ULg; Van Cutsem, Thierry ULg

in IEEE Transactions on Smart Grid (in press)

This paper presents a centralized control scheme to regulate distribution network voltages in the presence of high penetration of distributed generation. The approach is inspired of Model Predictive ... [more ▼]

This paper presents a centralized control scheme to regulate distribution network voltages in the presence of high penetration of distributed generation. The approach is inspired of Model Predictive Control in order to compensate for modeling inaccuracies and measurement noise. The control actions, calculated from a multi-step optimization, are updated and corrected by real-time measurements. The proposed controller uses a linear model to predict the behavior of the system and the optimization is solved using quadratic programming. The proposed corrective control has been tested in a 11-kV distribution network including 75 nodes and hosting 22 distributed generating units. [less ▲]

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See detailDesign and modelisation of a straylight facility for space optical instrument
Mazy, Emmanuel ULg; Stockman, Yvan ULg; Hellin, Marie-Laure ULg

in SPIE (Ed.) 2012 Optical system Design (in press)

In the framework of instrument calibration, straylight issues are a critical aspect that can deteriorate the optical performances of instrument. To cope with this, a new facility is designed dedicated for ... [more ▼]

In the framework of instrument calibration, straylight issues are a critical aspect that can deteriorate the optical performances of instrument. To cope with this, a new facility is designed dedicated for in-field and far field straylight characterization: up to 10-8 for in-field and up to 10-10 for far field straylight in the visible to NIR spectral ranges. Moreover, from previous straylight test performed at CSL, vacuum conditions are needed for reaching the 10-10 rejection requirement mainly to avoid air/dust diffusion. The major constrains are to design a straylight facility either for in-field and out-field straylight measurements. That requires high dynamic range at source level and a high radiance point source allowing small diverging collimated beam. Moreover, the straylight facility has to be implemented into a limited envelope and has to be built with vacuum compatible materials and black coating. As checking the facility performance requires an instrument better than the facility itself, that is no easy to find, so that the performances have been estimated through a modelisation into a non sequential optical software. This modelisation is based on CAD importation of mechanical design, on BRDF characteristics of black coating and on statistical averaging of ray tracing at instrument entrance. [less ▲]

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See detailThe benefit of musical and linguistic expertise on language acquisition in sung material
Larrouy, Pauline ULg; Leybaert, Jacqueline; Kolinsky, Régine

in Musicae Scientae (in press)

Music learning and training appear to have large cross-domain transfer effects: they are beneficial in various cognitive domains including language. The present study aimed at examining the role of music ... [more ▼]

Music learning and training appear to have large cross-domain transfer effects: they are beneficial in various cognitive domains including language. The present study aimed at examining the role of music expertise on how musical and linguistic information contained in songs is used. However, as the superiority of musicians could be attributed to improvements in executive functions (e.g., Bialystok, & DePape, 2009), we tried to isolate the role of music training by comparing music experts to both non-experts and language experts. To this aim we used the tasks proposed by Schön, Boyer, Moreno, Besson, Peretz, and Kolinsky (2008), who compared artificial language learning (ALL) based on spoken sequences to ALL based on sung sequences. These authors concluded that songs, more than speech, allow fast and strong learning. In contrast to Schön et al. (2008), the benefit of songs on ALL was not found among nonexperts in our study. However, there was a highly significant interaction between type of expertise and materials. The music experts were the only group to benefit from the matching of linguistic and music information, hence showing a different profile than language experts. The present data thus confirms the specificity of transfer effects linked to music expertise. [less ▲]

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See detailLifestyle Behaviours and Plasma Vitamin C and Beta-Carotene Levels from the ELAN Population (Liège, Belgium)
Pincemail, Joël ULg; Vanbelle, Sophie; Degrune, Fabien et al

in Journal of Nutrition and Metabolism (in press), 2011

Several factors, including fruit and vegetables intakes, have been shown to significantly influence the plasma concentrations of the two antioxidants vitamin C and β-carotene. Deficiency levels of 6 mg/L ... [more ▼]

Several factors, including fruit and vegetables intakes, have been shown to significantly influence the plasma concentrations of the two antioxidants vitamin C and β-carotene. Deficiency levels of 6 mg/L (34.2 μM) for vitamin C and of 0.22 mg/L (0.4 μM) for β-carotene have been suggested below which cardiovascular risk might be increased. The present study performed on 897 presumably healthy subjects aged 40–60 years aimed to examine how modifiable lifestyle factors may be related to vitamin C and/or β-carotene deficiency. Gender, smoking, lack of regular physical activity and of daily fruit consumption (≥2/day), and social status (in particular, unemployment) were found to be significant risk factors for vitamin C deficiency. For β-carotene deficiency, the same factors were identified except social status; moreover, overweight and OC use in women were also found to have a deleterious effect. For non exposed subjects, the probability of developing vitamin C deficiency was 4% in men and 2.4% in women. This probability increased to 66.3% for men and to 44.3% for women (and even to 50.4% under OC use), when all risk factors were present. For β-carotene deficiency, the corresponding probabilities were equal to 29.7% in men and 13.7% in women (no risk factor present), and to 86.1% for men and 69.9% (91.6% for OC use) for women (all factors present), respectively. [less ▲]

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See detailLa physiognomonie au XIXe siècle. Transpositions esthétiques et médiatiques
Stienon, Valérie ULg; Wicky, Érika

Book published by revue Etudes Françaises (in press)

Dès les premières traductions françaises des traités de Johann Kaspar Lavater à la fin du XVIIIe siècle, la physiognomonie a pris une place prépondérante dans l’iconographie et la pensée de l’époque. Très ... [more ▼]

Dès les premières traductions françaises des traités de Johann Kaspar Lavater à la fin du XVIIIe siècle, la physiognomonie a pris une place prépondérante dans l’iconographie et la pensée de l’époque. Très tôt renforcée par la diffusion des traités de phrénologie de Franz Josef Gall, cette théorie paramédicale a suscité une émulation telle qu’elle a contribué à poser les bases de la morphopsychologie, qu’elle a participé au développement de l’anthropométrie et s’est ramifiée en d’innombrables branches parmi lesquelles figurent la physiognomonie zoologique, la physiognomonie ethnologique ou encore la « pathognomonie ». En outre, reposant sur la conviction qu’il est possible d’atteindre les profondeurs de l’intériorité humaine par l’observation d’éléments conçus comme autant de signes à déchiffrer, cette théorie relève du raisonnement par induction qui a pris, dans la fiction littéraire, la forme spécifique d’une recherche d’indices et a participé, dans les disciplines médicales, à la méthode diagnostique. Le postulat selon lequel une connaissance de l’être humain est possible par l’observation minutieuse de ses traits extérieurs – conviction renforcée, à la moitié du siècle, par les possibilités techniques de la photographie – a contribué à enrichir la description, à affiner l’art du portrait et à aiguiser le trait incisif de la caricature. Ayant offert de riches moyens cognitifs et esthétiques d’exploration du monde social au peintre, à l’illustrateur, à l’homme de lettres et à l’historien, ces théories paramédicales ont durablement marqué l’histoire des conceptions et des représentations sociales. Envisager l’influence de la physiognomonie en termes de diffusion d’un paradigme scientifique permettra de saisir les modalités et de mesurer les enjeux non seulement de la transposition de ce paradigme d’un médium à un autre, mais aussi de sa circulation entre différentes aires géographiques, disciplinaires ou sociales. L’étude des vecteurs suivant lesquels la physiognomonie investit les représentations fera intervenir des corpus variés, issus de contextes culturels allant de la France romantique à la blogosphère actuelle en passant par l’Allemagne nazie de l’entre-deux-guerres. À l’observation attentive des sources primaires (documents historiques, traités médicaux, gravures d’époque, œuvres picturales, textes littéraires), s’ajoutera une réflexion sur la postérité de ces développements théoriques par l’analyse des discours distanciés, dubitatifs, voire explicitement critiques à leur égard, et ce dès leur toute première diffusion. Ce dossier propose une réflexion susceptible d’apporter des éléments de réponse à la double question suivante : de quelle postérité épistémique le modèle d’interprétation et de représentation hérité de la physiognomonie bénéficie-t-il, entre dépréciation et application effective, à partir de la seconde moitié du XIXe siècle ? Comment cette influence s’est-elle répandue ? [less ▲]

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See detailRaul Rossetti : Dos de verre
D'Arconso, Sabrina ULg; Curreri, Luciano ULg; Virone, Carmelo

Book published by Les Editions du Cerisier (in press)

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See detailCompte-rendu de l'ouvrage de Boyd Taylor COOLMAN et Dale M. COULTER : Trinity and creation
Close, Florence ULg

in Cahiers de Civilisation Médiévale (in press)

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See detailO insecabilis unitas ? Augustinisme et théologie politiques
Close, Florence ULg

in Depreux, Philippe; Esders, Stefan (Eds.) La productivité d'une crise: le règne de Louis le Pieux (814-840) et la transformation de l'Empire carolingien / Produktivität einer Krise: Die Regierungszeit Ludwigs des Frommen (814-840) und die Transformation des karolingischen Imperium » (Limoges, mars 2011) (in press)

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See detailLa politique religieuse des Pippinides (714-768)
Close, Florence ULg

Book published by PULIM (in press)

L’image de Charles Martel pilleur d’Église figure encore dans bon nombre de nos manuels et grandes synthèses historiques. Il en va de même de celle de l’avènement de Pépin III à la royauté, élu par un ... [more ▼]

L’image de Charles Martel pilleur d’Église figure encore dans bon nombre de nos manuels et grandes synthèses historiques. Il en va de même de celle de l’avènement de Pépin III à la royauté, élu par un peuple franc unanime, sur un précepte du pape Zacharie, et oint par Boniface. Or, de multiples questions ont été soulevées, ces dernières années, de nouvelles orientations de recherche ont été suggérées, qui constituent un pressant appel à un nouvel examen de la crédibilité des sources principales de l'histoire du royaume franc. Selon toute vraisemblance, la conviction des Carolingiens de détenir leur pouvoir directement de Dieu ne remonte pas au-delà du changement de dynastie mais n’est pas née ex nihilo. Elle plonge ses racines dans les décennies qui précédèrent le coup d’État de 751. L’alliance franco-pontificale de 754 fut, de toute évidence, l’aboutissement d’une transformation progressive de l’attitude des Pippinides à l’égard de Rome, du sentiment religieux et de leur rapport au sacré. À la fois typologie de sources et florilège, ce volume entend donner un aperçu de l’ampleur et de la diversité du corpus de sources à ceux et celles qui souhaiteraient aborder ce pan de l’histoire politico-religieuse du haut Moyen Âge, en présentant vingt-six sources du VIIIe siècle – narratives, diplomatiques, épistolaires ou liturgiques – traduites et commentées, retenues pour leur caractère exemplatif. [less ▲]

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See detailAldebert et Clément. Deux évêques marginaux sacrifiés à la réforme de l’Église ?
Close, Florence ULg

in Depreux, Philippe (Ed.) Compétition et sacré au haut moyen âge : entre médiation et exclusion. Actes du colloque international tenu à Limoges du 2 au 4 juillet 2012 (in press)

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See detailCOSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses: XII. Time delays of the doubly lensed quasars SDSS~J1206+4332 and HS~2209+1914
Eulaers, Eva ULg; Tewes, Malte; Magain, Pierre ULg et al

in Astronomy and Astrophysics (in press)

Aims. Within the framework of the COSMOGRAIL collaboration we present 7- and 8.5-year-long light curves and time-delay esti- mates for two gravitationally lensed quasars: SDSS J1206+4332 and HS 2209+1914 ... [more ▼]

Aims. Within the framework of the COSMOGRAIL collaboration we present 7- and 8.5-year-long light curves and time-delay esti- mates for two gravitationally lensed quasars: SDSS J1206+4332 and HS 2209+1914. Methods. We monitored these doubly lensed quasars in the R-band using four telescopes: the Mercator, Maidanak, Himalayan Chandra, and Euler Telescopes, together spanning a period of 7 to 8.5 observing seasons from mid-2004 to mid-2011. The pho- tometry of the quasar images was obtained through simultaneous deconvolution of these data. The time delays were determined from these resulting light curves using four very different techniques: a dispersion method, a spline fit, a regression difference technique, and a numerical model fit. This minimizes the bias that might be introduced by the use of a single method. Results. The time delay for SDSS J1206+4332 is ∆tAB = 111.3 ± 3 days with A leading B, confirming a previously published result within the error bars. For HS 2209+1914 we present a new time delay of ∆tBA = 20.0 ± 5 days with B leading A. Conclusions. The combination of data from up to four telescopes have led to well-sampled and nearly 9-season-long light curves, which were necessary to obtain these results, especially for the compact doubly lensed quasar HS 2209+1914. [less ▲]

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See detailChemical surface inhomogeneities in late B-type stars with Hg and Mn peculiarity: I. Spot evolution in HD 11753 on short and long time scales
Korhonen, Heidi; Gonzalez, J.F.; Briquet, Maryline ULg et al

in Astronomy and Astrophysics (in press)

Detailed reference viewed: 14 (1 ULg)