460 research outputs found
Mabilon-Bonfils, B, Lecorre, Colinet, S. T. Jeannin, L. Haag, P. Numa-Bocage, L. Jaillet, A. « On n’a été ni Morin, ni Bourdieu » Spectacle-recherche 2022
No full textMabilon-Bonfils, B, Lecorre, Colinet, S. T. Jeannin, L. Haag, P. Numa-Bocage, L. Jaillet, A. « On n’a été ni Morin, ni Bourdieu » Spectacle-recherche 202
Mabilon-Bonfils, B, Lecorre, Colinet, S. T. Jeannin, L. Haag, P. Numa-Bocage, L. Jaillet, A. « On n’a été ni Morin, ni Bourdieu » Spectacle-recherche 2022
No full textMabilon-Bonfils, B, Lecorre, Colinet, S. T. Jeannin, L. Haag, P. Numa-Bocage, L. Jaillet, A. « On n’a été ni Morin, ni Bourdieu » Spectacle-recherche 202
Andreas SCHMIDT-COLINET & Georg A. PLATTNER, Antike Architektur und Grundformen und Grundbegriffe.
No full textBonato-Baccari Stéphanie. Andreas SCHMIDT-COLINET & Georg A. PLATTNER, Antike Architektur und Grundformen und Grundbegriffe. . In: L'antiquité classique, Tome 75, 2006. p. 637
Christophe Colinet. L'autodafé des banlieues. Quand les banlieues Flambent. Préface d'Orlando de Rudder, Paris, Éd. Imago, 1999
No full textMayol Pierre. Christophe Colinet. L'autodafé des banlieues. Quand les banlieues Flambent. Préface d'Orlando de Rudder, Paris, Éd. Imago, 1999. In: Agora débats/jeunesses, 16, 1999. La passion du sport. p. 117
Not only academically oriented, but supportive and friendly. A comparative study of students' idea of a good school in three European countries
No full textAmong the main policy objectives recently re-affirmed by the European Community’s Horizon 2020 and Erasmus+ are the renewed European cooperation in the youth field and the emphasis on developing social capital and citizenship and participation. Indeed, the need to give young people a more significant role in decision-making processes, in particular in school contexts, has been acknowledged by authors although ‘in many aspects of education and social provision, the child’s voice remains absent’ (Sargeant, 2012: 1). Therefore, we need ‘more productive approaches to assessment and accountability’ (Stobart 2008, p. 89) which afford a more significant role to stakeholders inside school communities (Grion and Cook-Sather, 2013). In this context, the aim of this paper is to build a new concept of school quality, drawing from how pupils in England, Italy and France answered the question ‘what does make a good school?’. Qualitative data was collected by direct consultation with pupils through an open ended questionnaire. Pupils aged 11-15 (France (n= 130), England (n= 146), and Italy (n= 145)) took part in the study. Data was analysed by researchers in each of the three countries using a bottom-up approach, consisting of individual researcher’s initial coding, collaborative discussions on the main themes arising from the content analysis. The main finding show pupils have a shared idea of what “a good school” is despite their different national school contexts and systems. Two main dimensions were identified as representing the core of students’ views about the features of a ‘good’ school. The first is that pupils share similar views about the features of a good teacher. The second is that a ‘good’ school is one where teaching and learning is appropriate and more practice-focused; where the climate is friendly, supportive and safe; and, where the physical environment is aesthetically pleasing. This paper discusses the findings by drawing from diverse models of understanding the features of a good school. Clearly, for young people academic features are important but not sufficient to define the complexity of their experience and expectations
Microstructure of moving and/or evaporating contact lines
No full textThe accurate modeling of processes involving moving contact lines, such sessile droplet evapo- ration, nucleate boiling or imbibition in capillary structures, still faces considerable difficulties nowadays. This stems not only from the well-known viscous singularity induced by contact line motion, but also from other singularities associated with evaporation or condensation processes. Direct numerical simulation at a macroscopic scale generally fails in the vicinity of contact lines, where the rates of viscous dissipation and of heat/mass transfer can become extremely high. It is therefore necessary to build analytical (or semi-analytical) models describing the so-called microstructure of the contact line, i.e. the detailed shape of the liquid/vapor interface in the direct vicinity of the rigid wall. These microstructure models have to incorporate the rele- vant microscale effects, which hopefully enables regularization of the contact line singularities, thereby yielding a finite force exerted on the substrate, as well as a finite rate of phase change.In this presentation, we highlight recent progresses in this direction, focusing on the role of disjoining (Derjaguin) pressure, as well as on the Kelvin effect (dependence of saturation con- ditions on the curvature of the liquid/vapor interface). No other small-scale regularization mechanism (such as slip, diffuse interfaces, ) is considered. Consideration is limited to pure apolar liquids in contact with their pure vapor, on a flat homogeneous substrate.Within the lubrication approximation (small slope of the liquid/vapor interface relative to the substrate), it is first shown that a Cox-Voinov solution is generally valid at scales intermediate between the macroscopic (outer) and the microscopic (inner) scales, provided the rate of phase change decreases sufficiently fast with film thickness (which is generally the case). This well- known relationship expresses the apparent slope of the liquid/vapor interface as a function of the contact line velocity, and can therefore be used as an effective boundary condition in macroscopic codes. Yet, this law contains two parameters that first need to be calculated by proper asymptotic matching with the inner scale region: the apparent contact angle of the motionless microstructure, and a microlength entering the logarithmic (motion-induced) term. This matching is here accomplished in quite a variety of situations [1]: complete or partial wetting, non-volatile or volatile case, with or without kinetic effects, Importantly, depending on the disjoining pressure isotherm characterizing the considered fluid/solid pair, some microstructures are found to be associated with an extended microfilm covering the substrate ahead of the contact line (sometimes called precursor or adsorbed film), while some other kinds of microstructures are truncated, i.e. there is a point beyond which the surface may be considered as bare [2]. In particular, a minimalist model based on the Kelvin effect alone (without disjoining pressure) [3] is also described, and is shown to admit solutions with truncated microfilms while fully escaping both viscous and phase change singularities. This stems from a generic mechanism where the curvature of the liquid/vapor interface in the inner region self-adjusts to contact line motion in such a way that the liquid always has vanish- ing velocity at contact with the substrate (while the interface moves by Kelvin-effect-induced evaporation or condensation).Another important feature emphasized in the present talk is the occurrence of finite evaporation-induced contact angles, even for completely wetting situations and negligible con- tact line velocity. Such non-vanishing angles are due to intense microflows and corresponding stresses induced in the microregion, and are parametrically calculated as a function of the gov- erning dimensionless parameters of the problem (see also the recent book chapter [4]). Finally, some interferometric measurements of the apparent contact angles of sessile droplets of various HFEs evaporating into ambient air are presented, and shown to compare satisfactorily with a disjoining-pressure-based model appropriately modified to account for evaporation into an inert gas such as air.This work has been realized in collaboration with Dr Alexey Rednikov, Dr Sam Dehaeck and Dr Yannis Tsoumpas. The author gratefully acknowledges financial support of ESA and BELSPO (Prodex - Evaporation and Prodex - Heat Transfer contracts), of ULB and of the Fonds de la Recherche Scientifique – FNRS.References[1] P. Colinet and A. Rednikov, On integrable singularities and apparent contact angles within a classical paradigm. Partial and complete wetting regimes with or without phase change, Eur. Phys. J. – Special Topics, 197, 89-113 (2011).[2] A. Rednikov and P. Colinet, Truncated versus extended microfilms at a vapor-liquid con- tact line on a heated substrate, Langmuir, 27, 1758-1769 (2011).[3] A. Rednikov and P. Colinet, Singularity-free description of moving contact lines for volatile liquids, Phys. Rev. E, 87, 010401(R) (2013).[4] P. Colinet and A. Rednikov, Precursor films and contact line microstructures, in Droplet Wetting and Evaporation, Ed. D. Brutin, Elsevier (2015).info:eu-repo/semantics/nonPublishe
« La méthode de mesure et/ou les conditions opératoires influencent-elles le comportement de la tension superficielle d’un mélange eau-heptanol en fonction de la température ?» -- Chimie physique
No full textLa tension superficielle est une grandeur physique qui caractérise l’énergie présente à la séparation de deux milieux. J’ai mesuré des tensions superficielles pour le service de Chimie physique de l’Ecole Polytechnique de l’Université libre de Bruxelles, dans lequel je travaille actuellement, pour mettre en évidence un minimum de tension superficielle en fonction de la température dans des solutions aqueuses d’heptanol. Ces mesures ont été réalisées en 1988 et n’ont fait l’objet d’aucune publication. En général la tension superficielle d’un liquide décroit lorsque la température augmente mais la présence d’un minimum indiquerait qu’elle peut croître dans certaines plages de température. Cette particularité aurait du être mise en évidence expérimentalement, mais les résultats escomptés ne sont pas apparus. Le but de ce travail est d’évaluer la pertinence de la méthode de mesure sur les valeurs expérimentales dans des conditions proches de celles de 1988 en mesurant des valeurs proches avec une autre méthode. Mon expérience dans ce domaine pourra ainsi être mise au service des chercheurs qui désirent évaluer des tensions superficielles à l’aide du tensiomètre récemment acquis par le service TIPs (prof. P. Colinet) et devra permettre de démarrer l’intégration du module de mesure thermostatisé. Mon travail débute par une description des méthodes de mesures puis expose les mesures effectuées et se termine par l’interprétation des résultats et les perspectives qu’ils ouvriront.Ce travail a été réalisé dans le cadre du concours d'accession 2008 de l'Université libre de Bruxellesinfo:eu-repo/semantics/nonPublishe
X-ray characterization of indium during melting
No full textDuring melting of Indium the structure of solid and liquid phases have been investigated by X-ray diffractometry (XRD) in 1-g conditions, At the melting point T-M a re-orientation of crystalline grains occurs in the solid phase. The texture change, unusually rapid for a thermally activated process, is attributed to an abnormal increase of vacancy concentration, This explanation is in agreement with the observed shifts of XRD peaks towards lower angles. As a consequence of the texture change,the lattice planes facing the first formed liquid are(002) and (101) planes, i.e. those planes allocating 1st and 2nd neighbours around a given atom with shell radii very close to the mean distance of nearest neighbours in liquid as obtained from the radial distribution function (RDF). Convective motions in the liquid can be eliminated by repeating the same XRD measurements in mu-g. To get the best experimental conditions it is discussed the possibility, to use thin oxide films grown on the external surface of samples as containers during melting. This technique was already successfully tested by present investigators in the experiment ES 311 A-B carried Out during the mission SPACELAB-1. (C) 2002 COSPAR. Published by Elsevier Science Ltd. All rights reserved
Andreas Schmidt-Colinet en collaboration avec K. Al-Ascad et C. Müting-Zimmer, et des contributions de P. Caselitz et U. Heimberg, Das Tetnpelgrab Nr. 36 in Palmyra. Studien zur palmyrenischen Grabarchitektur und ihrer Ausstattung, (Damaszener Forschungen, Band IV)
No full textGriesheimer Marc. Andreas Schmidt-Colinet en collaboration avec K. Al-Ascad et C. Müting-Zimmer, et des contributions de P. Caselitz et U. Heimberg, Das Tetnpelgrab Nr. 36 in Palmyra. Studien zur palmyrenischen Grabarchitektur und ihrer Ausstattung, (Damaszener Forschungen, Band IV). In: Syria. Tome 72 fascicule 3-4, 1995. pp. 453-456
Démission de M. Colinet, en suspens jusqu'à la vérification des pouvoirs de son suppléant, lors de la séance du 18 novembre 1789
No full textDémission de M. Colinet, en suspens jusqu'à la vérification des pouvoirs de son suppléant, lors de la séance du 18 novembre 1789. In: Archives Parlementaires de 1787 à 1860 - Première série (1787-1799) Tome X - Du 12 novembre au 24 décembre 1789. Paris : Librairie Administrative P. Dupont, 1878. p. 87
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