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See detailLa détection des réponses inappropriées dans les examens: une étude de 3 indices corrigés selon la méthode de Snijders
Béland, Sébastien; Raîche, Gilles; Magis, David ULg

Conference (2017, January 25)

Certains étudiants peuvent répondre au hasard ou être inattentifs en situation d’examen. Les indices de détection de patrons de réponses inappropriés (person-fit index) sont prometteurs pour détecter ces ... [more ▼]

Certains étudiants peuvent répondre au hasard ou être inattentifs en situation d’examen. Les indices de détection de patrons de réponses inappropriés (person-fit index) sont prometteurs pour détecter ces types de réponse. Nous allons, dans le cadre de cette communication, nous pencher sur le cas de trois indices de détection populaires qui présentent des caractéristiques permettant d’en faciliter l’interprétation : lz, ZU et ZW. Par contre, des études antérieures ont montré que ces trois indices sont fortement affectés par le fait que l’habileté d’un étudiant est estimée plutôt que réelle (Molenaar et Hoijtink, 1990). Snijders (2001) a proposé une version corrigée de l’indice lz (nommée lz*) afin de tenir compte de cette difficulté. De leur côté, Magis, Béland et Raîche (2014) ont corrigé deux autres indices selon l’approche de Snijders (2001) : U* et W*. Il reste cependant à analyser plus en détails le comportement de la famille des indices corrigés, soit, lz*, U* et W*. Pour ce faire, nous effectuons une étude de simulation et une étude des données du test de classement en anglais, langue seconde (TCALS-II). Les résultats démontrent que les indices corrigés lz* et W* sont les plus intéressants à utiliser. De son côté, U* présente des résultats parfois inappropriés, ce qui relance la réflexion sur la pertinence des indices de détection basés sur les carré-moyens non-pondérés. [less ▲]

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See detailFaire de sa voix, son alliée.
Morsomme, Dominique ULg; Remacle, Angélique

Conference given outside the academic context (2017)

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See detailAnalyser sans compter ni classer. Approches qualitatives de la recherche en soins en psychiatrie
Lejeune, Christophe ULg

Conference (2017, January 25)

Les recherches dans le champ de la santé s'appuient traditionnellement sur les protocoles standardisés de la recherche expérimentale. Ce type de recherches a montré son efficacité en médecine, en ... [more ▼]

Les recherches dans le champ de la santé s'appuient traditionnellement sur les protocoles standardisés de la recherche expérimentale. Ce type de recherches a montré son efficacité en médecine, en psychologie et en psychiatrie (notamment). Ces méthodes ne suffisent cependant plus lorsqu'il s'agit d'appréhender la situation de soin dans son épaisseur psychologique, interpersonnelle et sociale. La recherche qualitative convient alors mieux pour appréhender (par exemple) les interactions entre les patients et le personnel soignant. Spécifiques, les méthodes qualitatives n'en sont pas moins sérieuses, normées et scientifiques. Combinant rigueur, souplesse et pragmatisme, une recherche qualitative bien menée délivre une connaissance fine et permet en outre d'instruire les pratiques des premiers intéressés [less ▲]

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See detailObjectif Mars: défi ou utopie?
Stiepen, Arnaud ULg

Conference given outside the academic context (2017)

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See detailForest Risk Management Plans: Best Practices and Pitfalls
Riguelle, Simon ULg

Conference given outside the academic context (2017)

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See detailL'hypertension artérielle dans tous ses états
Krzesinski, Jean-Marie ULg

Scientific conference (2017, January 24)

HTA : définition, physiopathologie, conséquences et traitement. Comment gérer une élévation des chiffres tensionnels en 2017? Comment pratiquer l'automesure? Quel traitement proposer?

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See detailDes triangles de Pascal généralisés aux coefficients binomiaux de mots finis
Stipulanti, Manon ULg

Conference (2017, January 23)

We introduce a generalization of Pascal triangle based on binomial coefficients of finite words. These coefficients count the number of times a word appears as a subsequence of another finite word ... [more ▼]

We introduce a generalization of Pascal triangle based on binomial coefficients of finite words. These coefficients count the number of times a word appears as a subsequence of another finite word. Similarly to the Sierpinski gasket that can be built as the limit set, for the Hausdorff distance, of a convergent sequence of normalized compact blocks extracted from Pascal triangle modulo 2, we show the existence of a subset of [0, 1]×[0, 1] associated with this extended Pascal triangle modulo a prime p. [less ▲]

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See detailTable ronde "Jeu vidéo et famille. Comment concilier les deux ?"
Dozo, Björn-Olav ULg

Conference given outside the academic context (2017)

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See detail100 minutes avec Dorian - Autour du jeu vidéo
Delbouille, Julie ULg

Conference given outside the academic context (2017)

Table-ronde avec le vidéaste Dorian Chandelier et le créateur Thibaud Gayraud, autour de la thématique "Pourquoi le jeu vidéo nous touche-t-il si intiment, pourquoi fait-il sens avec une telle intensité ... [more ▼]

Table-ronde avec le vidéaste Dorian Chandelier et le créateur Thibaud Gayraud, autour de la thématique "Pourquoi le jeu vidéo nous touche-t-il si intiment, pourquoi fait-il sens avec une telle intensité ?". Le thème vise à parler de la puissance d'évocation et d'impact du jeu du point de vue de l’analyste, du créateur et de la chercheuse, ainsi que du joueur. [less ▲]

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See detailLes pathologies de l’adaptation et l'adaptation des pathologies
Englebert, Jérôme ULg

Scientific conference (2017, January 21)

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See detailPhotocleavable stabilizer for the preparation of PHEMA nanogels by dispersion polymerization in supercritical carbon dioxide
Alaimo, David; Grignard, Bruno ULg; Kuppan, Chandrasekar et al

in Polymer Chemistry (2017), 8(3), 581-591

A new photo-sensitive diblock copolymer composed of a hydrophilic sequence of poly(ethylene oxide) (PEO) linked to a CO2-philic sequence of poly(1H,1H,2H,2H-heptadecafluorodecyl acrylate) (PFDA) by a ... [more ▼]

A new photo-sensitive diblock copolymer composed of a hydrophilic sequence of poly(ethylene oxide) (PEO) linked to a CO2-philic sequence of poly(1H,1H,2H,2H-heptadecafluorodecyl acrylate) (PFDA) by a light sensitive o- nitrobenzyl group was successfully synthesized by RAFT polymerization and used as stabilizer for the free radical polymerization of 2-hydroxyethyl methacrylate (HEMA) in dispersion in ?,?,?-trifluorotoluene and supercritical carbon dioxide (scCO2). Thanks to this fluorinated stabilizer, well-defined particles of PHEMA down to 350 nm of diameter were produced in scCO2. Advantageously, the photocleavable group at the block junction of the stabilizer could be cleaved by exposing the particles to UV light so that the fluorinated block could be extracted in TFT or scCO2. As supported by X-ray photoelectron spectroscopy (XPS) analysis, up to 80 % of the fluorinated block of the stabilizer can be removed, leading to efficient swelling and dispersion of the resulting PHEMA nanogels in water. [less ▲]

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See detailCharacterization of High Altitude Clouds at the Martian Limb and Terminator Using MAVEN IUVS Observations
Deighan; Stiepen, Arnaud ULg; IUVS team

Conference (2017, January 20)

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See detailMars Ozone mapping with MAVEN IUVS
Lefèvre; Stiepen, Arnaud ULg; IUVS team

Conference (2017, January 20)

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See detailComparison of Various Indices of Energy Metabolism in Recumbent and Healthy Dairy Cows
Guyot, Hugues ULg; Detilleux, Johann ULg; Lebreton, Pascal et al

in PLoS ONE (2017), 12(1), 1-11

BACKGROUND: Downer cow syndrome (DCS) is often diagnosed in dairy cattle during the early post-partum period. The etiology of this condition is not completely understood, as it can be related to the ... [more ▼]

BACKGROUND: Downer cow syndrome (DCS) is often diagnosed in dairy cattle during the early post-partum period. The etiology of this condition is not completely understood, as it can be related to the energetic or electrolyte metabolism, as well as to infectious diseases or to trauma. HYPOTHESIS/OBJECTIVES: The aim of this study is to compare energy metabolism and insulin sensitivity indices and various biochemical parameters between recumbent and healthy dairy cows. ANIMALS: A prospective study has been undertaken on 361 recumbent and 80 healthy Holstein cows. METHODS: Plasmatic glucose, insulin, non-esterified fatty acid (NEFA) and β-hydroxybutyrate (BHB) were assayed in all cows in order to calculate the insulin sensitivity indices but also minerals (Calcium, Phosphorous and Magnesium), thyroxin and creatine kinase. Body Condition Scores (BCS) was assessed. RESULTS: Significant differences in NEFA, and the glucose and insulin sensitivity indices ("Homeostasis Model Assessment" HOMA, "Revised Quantitative Insulin Sensitivity Check Index" RQUICKI, RQUICKI-BHB) were observed between healthy and recumbent cows in the early post-parturient period indicating disturbances of glucose and insulin homeostasis in the recumbent cows. In the same manner, mineral concentrations were significantly different between healthy and recumbent cows. Glucose, insulin NEFA, and HOMA, were different between early post-partum downer cows and the DCS-affected cows later in lactation. CONCLUSION AND CLINICAL IMPORTANCE: Results indicate disturbances in energy homeostasis in DCS-affected dairy cows. Further research should determine a prognostic value of the indices in cows suffering from recumbency of metabolic origin [less ▲]

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See detailStatistical description of hydrogeological parameters for the main aquifer contexts in Wallonia
Briers, Pierre ULg; Dollé, Fabien ULg; Orban, Philippe ULg et al

Conference (2017, January 20)

The Walloon Region Soil decree proposes a series of guidance documents associated to the procedures for site remediation operations. Among others, one of these documents describes methodologies and tools ... [more ▼]

The Walloon Region Soil decree proposes a series of guidance documents associated to the procedures for site remediation operations. Among others, one of these documents describes methodologies and tools for risk assessment of pollutant leaching from soil to groundwater and for pollutant dispersion through groundwater. These tools require using estimates of hydrogeolocial parameters such as hydraulic conductivity, effective (transport) porosity etc. In this context, an inventory of hydrogeological studies (regional characterization studies, groundwater protection zones…) was performed to identify and collect available field-based measurements for a statistical description and analysis of such data. Complementary to that, a simple geodatabase has been developed to manage and process these data. As expected, these results show contrasted parameter distributions per geological contexts and regions. The objective of the presentation is to describe the methodology followed for the statistical treatment of hydrogeological data and to present the results and associated database. It is believed that such results can be very useful for different hydrogeological studies, in particular as a first referential for groundwater modelling applications and any other studies where statistical descriptions of hydrogeological data are relevant. [less ▲]

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See detailConclusion
Marganne, Marie-Hélène ULg

in Nocchi Macedo, Gabriel; Scappaticcio, Marie Chiara (Eds.) Signes dans les textes, textes sur les signes. Érudition, lecture et écriture dans le monde gréco-romain. Actes du colloque international (Liège, 6-7 septembre 2013) (2017, January 20)

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See detailTextes sur les signes: les sources latines
Nocchi Macedo, Gabriel ULg

in Nocchi Macedo, Gabriel; Scappaticcio, Maria Chiara (Eds.) Signes dans les textes, textes sur les signes. Actes du colloque international. Liège, 6-7 septembre 2013. (2017)

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