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See detailDémarches participatives et approches quali-quantitatives. Le projet logiciel Mesydel 2012
François, Aurore ULg; Rieppi, Stéphane ULg; Thiry, Aline ULg

in Claisse, Frédéric; Laviolette, C.; Reuchamps, M. (Eds.) et al La participation en action (2011)

Depuis plusieurs années, le laboratoire Spiral (Université de Liège, Département de Science politique), recourt régulièrement à la méthode Delphi pour mener certaines de ses recherches. Cette méthode ... [more ▼]

Depuis plusieurs années, le laboratoire Spiral (Université de Liège, Département de Science politique), recourt régulièrement à la méthode Delphi pour mener certaines de ses recherches. Cette méthode itérative de consultation d'experts, privilégiant l'anonymat et le recours à l'écrit, s'est ainsi vue librement adaptée – comme bien d'autres méthodes d'ailleurs – aux défis du participatif. Le traditionnel « panel d'experts » a ainsi largement été redéfini, autorisant, voire privilégiant, le recours aux experts dits « d'usage » dans le cadre de recherches se revendiquant des méthodologies participatives. En 2008, le laboratoire Spiral a élaboré son propre logiciel, Mesydel, permettant de mener en ligne un processus d'enquête Delphi complet : création de questionnaires, invitation des participants à le compléter, analyse et synthèse des réponses qui serviront de base à la préparation du questionnaire suivant (suivant le principe de la « rétroaction contrôlée »), traitement des données. Au fil de son histoire, l'approche du Mesydel s'est par ailleurs étoffée et diversifiée. Privilégiant à l'origine une analyse qualitative des contenus récoltés, le logiciel a progressivement intégré une série d'outils permettant des traitements plus quantitatifs. À ce jour, Mesydel peut se revendiquer d'une approche dite mixte, combinant des traitements qualitatifs et quantitatifs, et ce sur un même corpus de données. Ces multiples adaptations à partir du Delphi traditionnel, à savoir l'ouverture au participatif d'une part, et la transposition en ligne d'autre part, de même que l'inscription progressive du Mesydel dans les méthodes de recherche dites mixtes, constituent autant d'éléments qui n'ont pas manqué (et continuent) de nourrir les réflexions méthodologiques au sein du laboratoire, parmi les chercheurs, utilisateurs et développeurs de l'outil. Cette contribution propose de faire le point sur ces différents enjeux, à partir d'exemples tirés du projet de recherche ANACO – Analyse et opérationnalisation de la mesure de mise à l'abri et de confinement en Belgique, recherche effectuée en 2011 (financement IBZ – Ministère de l'intérieur). [less ▲]

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See detailSyncesia mascarena (Roccellaceae) a new species from La Réunion (Indian Ocean)
van den Boom, Pieter; Ertz, Damien; Brand, Maarten et al

in Opuscula Philolichenum (2011), 9

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See detailPolymer design by organometallic-mediated radical polymerization (OMRP)
Debuigne, Antoine ULg; Jérôme, Christine ULg; Detrembleur, Christophe ULg

in Polymer Preprints of Japan (2011), 60(2), 2565-2567

Transition metal-assisted polymerization techniques have always played a crucial role in polymer synthesis. As an illustration, metallic compounds have deeply marked the field of living/controlled radical ... [more ▼]

Transition metal-assisted polymerization techniques have always played a crucial role in polymer synthesis. As an illustration, metallic compounds have deeply marked the field of living/controlled radical polymerization (L/CRP) which gives access to well-defined polymers under non drastic conditions. Indeed, atom transfer radical polymerization (ATRP) is one of the most successful methods to polymerize vinyl monomers in a controlled manner. Besides this very successful system, another metal-assisted CRP technique is emerging, i.e. organometallic-mediated radical polymerization (OMRP). In contrast to ATRP, OMRP involves the reversible formation of a covalent bond between a transition metal and the polymer chains, which strongly decreases the extent of termination reactions and leads to polymers with predictable molecular weights. This lecture aims to provide a comprehensive overview of the synthetic and mechanistic aspects of OMRP as well as major achievements and remaining challenges in this field. [less ▲]

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See detailImputabilite medicamenteuse dans les iatrogenies cutanees.
PIERARD-FRANCHIMONT, Claudine ULg; QUATRESOOZ, Pascale ULg; REGINSTER, Marie-Annick ULg et al

in Revue Médicale de Liège (2011), 66(9), 474-7

Drug eruptions are frequently encountered. Their putative diagnosis is based on a set of imputability arguments. The histopathological aspect is often evocative of the nature of the dermatosis. It varies ... [more ▼]

Drug eruptions are frequently encountered. Their putative diagnosis is based on a set of imputability arguments. The histopathological aspect is often evocative of the nature of the dermatosis. It varies according to the type of drug reaction. Some drug eruptions follow a benign course, but others are life-threatening. [less ▲]

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See detailRandom matrix models for phase diagrams
Vanderheyden, Benoît ULg; Jackson, A. D.

in Reports on Progress in Physics (2011), 74

We describe a random matrix approach that can provide generic and readily soluble mean-field descriptions of the phase diagram for a variety of systems ranging from QCD to high-T_c materials. Instead of ... [more ▼]

We describe a random matrix approach that can provide generic and readily soluble mean-field descriptions of the phase diagram for a variety of systems ranging from QCD to high-T_c materials. Instead of working from specific models, phase diagrams are constructed by averaging over the ensemble of theories that possesses the relevant symmetries of the problem. Although approximate in nature, this approach has a number of advantages. First, it can be useful in distinguishing generic features from model-dependent details. Second, it can help in understanding the `minimal' number of symmetry constraints required to reproduce specific phase structures. Third, the robustness of predictions can be checked with respect to variations in the detailed description of the interactions. Finally, near critical points, random matrix models bear strong similarities to Ginsburg-Landau theories with the advantage of additional constraints inherited from the symmetries of the underlying interaction. These constraints can be helpful in ruling out certain topologies in the phase diagram. In this Key Issue, we illustrate the basic structure of random matrix models, discuss their strengths and weaknesses, and consider the kinds of system to which they can be applied. [less ▲]

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See detailTraitement durant cinq ans par denosumab (DMAb) chez des femmes ménopausées ostéoporotiques : résultats d'efficacité des deux premières années de l'extension de l'essai FREEDOM
Chapurlat, R.; Roux, C.; Papapoulos, S. et al

in Revue du Rhumatisme (2011), 78(S5), 214

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See detailGenetic screening for AIP mutations in Young patients with sporadic and Familial Pituitary Macroadenomas
Yaneva, M.; Elenkova, A.; Daly, Adrian ULg et al

in Endocrinologia = Endokrinologiia (2011), 16(1), 41-48

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See detailIntegration of a new hysteresis model in the Finite Elements method
Scorretti, Riccardo; V Sabariego, Ruth ULg; Sixdeniers, F. et al

(2011)

In this work we present an original magnetic hysteresis model with parameters fitted from measured reversal curves. This model is used together with the Finite Element method for studying a structure ... [more ▼]

In this work we present an original magnetic hysteresis model with parameters fitted from measured reversal curves. This model is used together with the Finite Element method for studying a structure composed of a magnetic core with air-gap excited by a coil. [less ▲]

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See detailLECITECH: un projet Spin-Off
Mertens, Cécile ULg

Diverse speeche and writing (2011)

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See detailScientific Assessment of Ozone Depletion: 2010, Chapter 2 - Stratospheric Ozone and Surface Ultraviolet Radiation
Douglass, A.; Fioletov, V.; Godin-Beekmann, Sophie et al

Report (2011)

As a result of the Montreal Protocol, ozone is expected to recover from the effect of ozone-depleting substances (ODSs) as their abundances decline in the coming decades. The 2006 Assessment showed that ... [more ▼]

As a result of the Montreal Protocol, ozone is expected to recover from the effect of ozone-depleting substances (ODSs) as their abundances decline in the coming decades. The 2006 Assessment showed that globally averaged column ozone ceased to decline around 1996, meeting the criterion for the first stage of recovery. Ozone is expected to increase as a result of continued decrease in ODSs (second stage of recovery). This chapter discusses recent observations of ozone and ultraviolet radiation in the context of their historical records. Natural variability, observational uncertainty, and stratospheric cooling necessitate a long record in order to attribute an ozone increase to decreases in ODSs. The primary tools used in this Assessment for prediction of ozone are chemistry-climate models (CCMs). These CCMs are designed to represent the processes determining the amount of stratospheric ozone and its response to changes in ODSs and greenhouse gases. Eighteen CCMs have been recently evaluated using a variety of process-based compari-sons to measurements. The CCMs are further evaluated here by comparison of trends calculated from measurements with trends calculated from simulations designed to reproduce ozone behavior during an observing period. [less ▲]

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See detailMolecular characterization of the AMPA-receptor potentiator S70340 in rat primary cortical culture: Whole-genome expression profiling.
Mourlevat, S.; Galizzi, J. P.; Guigal-Stephan, N. et al

in Neuroscience Research (2011), 70

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See detailChoosing the right land managment strategy: innovations in land managment tools
van der Krabben, Erwin; Halleux, Jean-Marie ULg

in Tira, Maurizio; van der Krabben, Erwin; Zanon, Bruno (Eds.) Land managment for urban dynamics. Innovative methods and practices in a changing Europe (2011)

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See detailEffect of ageing on different egg yolk fractions on surface properties at the air–water interface
Freschi, Jérôme ULg; Razafindralambo, Hary ULg; Danthine, Sabine ULg et al

in International Journal of Food Science & Technology (2011), 46

The aim of this study was to evaluate the impact of egg ageing on the surface properties of whole and fractionated yolk at the air–water interface. Eggs were stored at 4 Cfor 24 h, 1 week and 3 weeks ... [more ▼]

The aim of this study was to evaluate the impact of egg ageing on the surface properties of whole and fractionated yolk at the air–water interface. Eggs were stored at 4 Cfor 24 h, 1 week and 3 weeks after laying.A laboratory scale fractionation process was then applied at each ageing time. Egg yolk was separated into two fractions, plasma composed of low-density lipoproteins (LDLs) and livetins, and granules formed by highdensity lipoproteins (HDLs), phosvitins and LDLg (g = granule). Moreover, recombined plasma and granules fractions were investigated to highlight a potential synergic effect on surface properties. Results have shown the main contribution of LDLs on surface properties of yolk and an improvement of granules surface properties when they are disrupted. Moreover, ageing affected surface properties differently depending on the considered fractions. Broken LDLsand disrupted granules could explain this observed behaviour. Recombined fractions showed different compression isotherms at the air–water interface than whole yolk. [less ▲]

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See detailNécrologie de Rita Lejeune (1906-2009)
Henrard, Nadine ULg

in Estudis Romànics (2011), 33

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See detailTwo undescribed species of Phylloporia from Mexico based on morphological and phylogenetic evidence
Valenzuela, Ricardo; Raymundo, Tania; Cifuentes, Joaquin et al

in Mycological Progress (2011), 10(3), 341-349

Phylloporia rzedowskii and Phylloporia ulloai , both collected in tropical forests of the Sierra of the Huasteca Potosina, San Luis Potosi, Mexico, are described as new species. The main critical ... [more ▼]

Phylloporia rzedowskii and Phylloporia ulloai , both collected in tropical forests of the Sierra of the Huasteca Potosina, San Luis Potosi, Mexico, are described as new species. The main critical morphological features that characterize them are the pileus shape, the pore diameter, the basidiospores shape and size, and, possibly, their ecology, such as the host relationships (specificity/preference). Both species also form distinct clades in phylogenetic analysis based on partial DNA sequences data from the nuclear ribosomal LSU. An identification key for 10 species reported from the Americas is proposed. [less ▲]

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See detailPrediction of the Tension/Compression asymmetry of ECAP processed FCC material using an integrated model based on dislocation and back-stress
Chen, Enze; Duchene, Laurent ULg; Habraken, Anne ULg et al

in Materials Science Forum (2011), 667-669

In our recent work, a new integrated model was proposed to describe the back-stress evolution based on the dislocation substructure and texture. By relating the back-stress to the dislocation density in ... [more ▼]

In our recent work, a new integrated model was proposed to describe the back-stress evolution based on the dislocation substructure and texture. By relating the back-stress to the dislocation density in cell walls and in the cell interior, this model is able to capture the back-stress evolution of ECAP processed pure aluminium. In this paper, the model is used for another FCC material, namely copper. The aim is to check whether this model is able to predict the tension/compression asymmetry (due to the back-stress) of copper. The results show that this is indeed the case and it is also found that the strain rate ratio proposed in our previous work [1] is a function of the dislocation density ratio. [less ▲]

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See detailThe combined bone forming capacity of human periosteal derived cells and calcium phosphates.
Roberts, Scott J; Geris, Liesbet ULg; Kerckhofs, Greet ULg et al

in Biomaterials (2011), 32(19), 4393-405

Current knowledge suggests that the periosteum, a fibrous tissue which covers the surface of all bones, contains a population of progenitor cells which mediate the repair of bone defects. In an effort to ... [more ▼]

Current knowledge suggests that the periosteum, a fibrous tissue which covers the surface of all bones, contains a population of progenitor cells which mediate the repair of bone defects. In an effort to optimise the utilisation of this source of cells for bone engineering, herein we describe the rational selection of calcium phosphate (CaP) containing materials, based on biomaterial properties, and evaluation of their combined bone forming capacity. Five different commercially available orthopaedic 3D matrices composed of CaP particles in an open collagen network (NuOss, CopiOs, Bio-Oss((R)), Collagraft and Vitoss((R))) were evaluated in vitro and in vivo with human periosteal derived cells (hPDCs). It was found that the cell-material combinations behaved quite differently in vivo, despite apparent in vitro similarities in gene expression profiles. Bone formation was highest within the NuOss/hPDC implant at 13.03%, which also contained the highest incidence of bone marrow formation. The bone formed in this implant was chimeric with approximately 65% originating from implanted cells. Upon analysis of human specific gene expression, although it was found that predominantly osteogenic differentiation was observed within NuOss/hPDC implants, a lesser induction of chondrogenic genes was also observed. The formation of a cartilage intermediate was confirmed by histology. Additionally the NuOss/hPDC implant integrated into the mouse environment with apparent active scaffold resorption. This study demonstrates the importance of matching a cell support/biological matrix with a cell type and subsequently has outlined parameters which can be used for the rational selection of biomaterials for bone engineering. [less ▲]

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See detailComparative Planetary Magnetotails
Bagenal, F.; Jackman, C.; Slavin, J. et al

Poster (2011)

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