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See detailYBa2Cu3O(7-delta) thick films on Ag prepared by the electrophoretic deposition technique
Dusoulier, Laurent; Denis, Samuel; Fagnard, Jean-François ULg et al

in Journal of Physics: Conference Series (2006), 43

YBa2Cu3O7-δ thick films have been deposited onto Ag substrates by the Electrophoretic Deposition (EPD) technique. Different microstructures and electrical behaviours were observed depending on the ... [more ▼]

YBa2Cu3O7-δ thick films have been deposited onto Ag substrates by the Electrophoretic Deposition (EPD) technique. Different microstructures and electrical behaviours were observed depending on the starting powder. Coatings prepared from commercial powder displayed significant porosity and the superconducting transition width was found to be magnetic-field dependent. Films produced from home-made coprecipitated powder are denser but contain some secondary phases. No dependence of the resistive transition as a function of magnetic field (H ≤ 20 Oe) was observed in that case. [less ▲]

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See detailCoupling a two-way nested primitive equation model and a statistical SST predictor of the Ligurian Sea via data assimilation
Barth, Alexander ULg; Alvera Azcarate, Aïda ULg; Beckers, Jean-Marie ULg et al

in Ocean Modelling (2006), 13(3-4), 255-270

A primitive equation model and a statistical predictor are coupled by data assimilation in order to combine the strength of both approaches. In this work, the system of two-way nested models centred in ... [more ▼]

A primitive equation model and a statistical predictor are coupled by data assimilation in order to combine the strength of both approaches. In this work, the system of two-way nested models centred in the Ligurian Sea and the satellite-based ocean forecasting (SOFT) system predicting the sea surface temperature (SST) are used. The data assimilation scheme is a simplified reduced order Kalman filter based on a constant error space. The assimilation of predicted SST improves the forecast of the hydrodynamic model compared to the forecast obtained by assimilating past SST observations used by the statistical predictor. This study shows that the SST of the SOFT predictor can be used to correct atmospheric heat fluxes. Traditionally this is done by relaxing the model SST towards the climatological SST. Therefore, the assimilation of SOFT SST and climatological SST are also compared. (c) 2006 Elsevier Ltd. All rights reserved. [less ▲]

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See detailDINEOF reconstruction of clouded images including error maps. Application to the Sea-Surface Temperature around Corsican Island
Beckers, Jean-Marie ULg; Barth, Alexander ULg; Alvera Azcarate, Aïda ULg

in Ocean Science (2006), 2

We present an extension to the Data INterpolating Empirical Orthogonal Functions (DINEOF) technique which allows not only to fill in clouded images but also to provide an estimation of the error ... [more ▼]

We present an extension to the Data INterpolating Empirical Orthogonal Functions (DINEOF) technique which allows not only to fill in clouded images but also to provide an estimation of the error covariance of the reconstruction. This additional information is obtained by an analogy with optimal interpolation. It is shown that the error fields can be obtained with a clever rearrangement of calculations at a cost comparable to that of the interpolation itself. The method is presented on the reconstruction of sea-surface temperature in the Ligurian Sea and around the Corsican Island (Mediterranean Sea), including the calculation of inter-annual variability of average surface values and their expected errors. The application shows that the error fields are not only able to reflect the data-coverage structure but also the covariances of the physical fields. [less ▲]

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See detailRobust analysis of silhouettes by morphological size distributions
Barnich, Olivier ULg; JODOGNE, Sébastien ULg; Van Droogenbroeck, Marc ULg

in Lecture Notes in Computer Science (2006), 4179

We address the topic of real-time analysis and recognition of silhouettes. The method that we propose first produces object features obtained by a new type of morphological operators, which can be seen as ... [more ▼]

We address the topic of real-time analysis and recognition of silhouettes. The method that we propose first produces object features obtained by a new type of morphological operators, which can be seen as an extension of existing granulometric filters, and then insert them into a tailored classification scheme. Intuitively, given a binary segmented image, our operator produces the set of all the largest rectangles that can be wedged inside any connected component of the image. The latter are obtained by a standard background subtraction technique and morphological filtering. To classify connected components into one of the known object categories, the rectangles of a connected component are submitted to a machine learning algorithm called EXtremely RAndomized trees (Extra-trees). The machine learning algorithm is fed with a static database of silhouettes that contains both positive and negative instances. The whole process, including image processing and rectangle classification, is carried out in real-time. Finally we evaluate our approach on one of today's hot topics: the detection of human silhouettes. We discuss experimental results and show that our method is stable and computationally effective. Therefore, we assess that algorithms like ours introduce new ways for the detection of humans in video sequences. [less ▲]

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See detailBuilding a selectivity list of plant protection products on beneficial arthropods in open field: a clear example with potato crop.
Hautier, Louis; Jansen, Jean-Pierre; Mabon, Nicolas et al

in Bulletin OILB/SROP = IOBC/WPRS Bulletin (2006), 29(10), 21-32

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See detailNumerical simulation in cold rolling using adiabatic strip model : application to large roll deformation
STEPHANY, A.; Ponthot, Jean-Philippe ULg; LEGRAND, N.

in AUSTRIB 06 (2006)

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See detailThe ELEKTRA project: Towards a new learning experience
Kickmeier-Rust, M. D.; Schwarz, D.; Albert, D. et al

in Pohl, Margit; Holzinger, A.; Motschnig, R. (Eds.) et al M3 – Interdisciplinary aspects on digital media & education (2006)

Digital game-based learning is a hot topic of research and development. Since the advent of computer and video games, educators were inherently interested in utilizing the beneficial aspects of computer ... [more ▼]

Digital game-based learning is a hot topic of research and development. Since the advent of computer and video games, educators were inherently interested in utilizing the beneficial aspects of computer games for educational purposes. These factors are primarily the intrinsic motivation of games, immersive environments, engaging stories, and an artful balance between challenges and continuously growing abilities. Proponents of computer games delivered a large number of empirical investigations revealing that games may foster the development of abilities and competencies. Besides the advantageous aspects of computer games, a variety of problems were reported by researchers. Due to the high costs of professional game development, many educational games are technologically poor and cannot compete with entertainment games in terms of visual design, possibilities for interactions, or storytelling. Moreover, many current educational games do not incorporate a sound psychological, pedagogical, or didactic background; instead they are focusing on transmission or rehearsal of isolated facts or skills. Finally, such games lack the ability to adapt to individual competencies failing to balance challenge and abilities regarding knowledge or skills. The ELEKTRA project, introduced in this article, aims for addressing these problems relying on an interdisciplinary approach of cognitive science, neuroscience, pedagogy, game design, and game development. The project will develop an adventure game that can keep up with commercial games and that focuses on primarily curriculum-related educational purposes by incorporating a sound psychological and pedagogical framework. Moreover, the project will prove the outcomes of research and development by a comprehensive game demonstrator. [less ▲]

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See detail« Beau comme l’antique ». Pausanias et « l’archaïque »
Pirenne-Delforge, Vinciane ULg

in Ktema : Civilisations de l'Orient, de la Grèce et de Rome Antiques (2006), 31

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See detailBiographie d’un esprit au corps brisé. Les pierres magiques des ancêtres zápara d’Amazonie : des sujets du passé
Bilhaut, Anne-Gaël ULg

in Journal de la Société des Americanistes (2006), 92(1-2), 237-254

ife of a spirit in a broken body. The magic stones of Zapara’s ancestors in Lowland Amazonia : subjects of the past. The use of magic stones in the Amazon has been studied by many ethnographers. However ... [more ▼]

ife of a spirit in a broken body. The magic stones of Zapara’s ancestors in Lowland Amazonia : subjects of the past. The use of magic stones in the Amazon has been studied by many ethnographers. However, the analysis of the intersubjective relations that occur between these stones and their « master » remains succinct. The example of the stones of the Zapara offers an understanding of these relations. The ancestors of the Ecuadorian Zapara (Amazonia) left on the land many stones that, when found by humans, become subjects to be treated as such. Stones of the ancestors with whom they share a history, are passed on from generation to generation, directly or indirectly. This article tells the story of a spirit embodied in a stone whose story has been reconstructed by the Zapara through its description and narrations. Possessed by an ancestor then passed on to his descendants, this « stone subject » then lost its mineral body, which then modified the relation between the stone and its master. [less ▲]

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See detailDetermination of total water content in inulin using the volumetric Karl Fischer titration
Ronkart, S. N.; Paquot, Michel ULg; Fougnies, C. et al

in Talanta (2006), 70(5), 1006-1010

A new sample preparation method for the water content determination of mulin by volumetric Karl Fischer (KF) titration was developed and compared to the usual method of introducing the sample directly in ... [more ▼]

A new sample preparation method for the water content determination of mulin by volumetric Karl Fischer (KF) titration was developed and compared to the usual method of introducing the sample directly in the methanol-based working medium, modified or not by formamide (1:3, v/v) in order to increase sample solubility. In the proposed method, inulins were externally prepared by dissolving them in pure formamide (2.5:7.5, w/w). The time of analysis of the liquid/liquid reaction of the new method between the dissolved sample and the reaction medium is about 1-2 min, while the usual KF method is stopped after the 10 min delay time. The developed method permits the determination of water included in the crystals of the sample, confirmed by analysing both crystalline and amorphous mulin samples. Another advantage of this new method is its applicability for the water content determination of other polysaccharides that are not readily soluble in the working medium. Moreover. water content determination can be done by any type of volumetric KF titrator, as this proposed technique is not dependent on any additional tools such as a built-in homogeniser or a heatable titration beaker. (c) 2006 Elsevier B.V. All rights reserved. [less ▲]

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See detailTraitements médicaux du système respiratoire: 2-broncho-dilatateurs et autres substances
Van Erck, Emmanuelle ULg; Art, Tatiana ULg; Lekeux, Pierre ULg

in Pratique Vétérinaire Equine (2006), 38

The medical therapeutic arsenal available to the practitioner for treatment of respiratory conditions in horses is growing because of new drugs being introduced on the market, the marketing authorisation ... [more ▼]

The medical therapeutic arsenal available to the practitioner for treatment of respiratory conditions in horses is growing because of new drugs being introduced on the market, the marketing authorisation obtained for certain existing active ngredients, the possibility of using medicines authorised for humans and the development of aerosoltherapy. Nevertheless treatment remains empirical in the absence of a precise diagnosis, and the use of particular medicines may be unjustified and even erroneous, and in addition treatment fa ures can be discouraging and costly for the owner. However, when the diagnosis is established, combination of several medicines can silmificaxrtly and rapidly improve clinical signs and/or performance, and avoid sequelae and recurrence. In this article brief information is given on management of the environment followed by a very complete list of medicines used in horses with respirrtory conditions. The différent active ingredients available are listed by category and these includé antimicrobials, anti-inflammatories, bronchodilatators, mucolytics immune stimulants and other substances. Dosages, indications, pharmacokinetic properties, possible secondary effects and contra-indications are complied from a avide literature review. The essential considerations when deciding which treatment to use are discussed, in particular the effectiveness of the treatment for the disease, the mode of administration and the potential cost [less ▲]

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See detailWork Spaces in Art, Science and Business
Froehlicher, Thomas ULg; Joly, Jean-Baptiste; Billier, Dominique

Book published by Merz&Solitude Reihe Reflexiv (2006)

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See detailSome Concerns About the Reliability of LTE Abundance Analyses in Cool, Active Stars
Morel, Thierry ULg; Micela, G.; Favata, F.

in Chemical Abundances and Mixing in Stars in the Milky Way and its Satellites, ESO ASTROPHYSICS SYMPOSIA. ISBN 978-3-540-34135-2. Springer-Verlag, 2006, p. 64 (2006)

We discuss recent observational evidence illustrating the current limitations plaguing classical LTE abundance analyses of cool (T [SUB]eff[/SUB] < 5500 K), chromospherically active stars. Although ... [more ▼]

We discuss recent observational evidence illustrating the current limitations plaguing classical LTE abundance analyses of cool (T [SUB]eff[/SUB] < 5500 K), chromospherically active stars. Although significant progress on this issue can be evidently expected from a more realistic atmospheric modelling and treatment of NLTE line formation, a homogeneous abundance study of a large sample of inactive K-type stars may also prove valuable in disentangling temperature and activity effects. [less ▲]

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See detailOutils technologiques pour gérer la qualité microbiologique des aliments
Clinquart, Antoine ULg

in Belgian Association for Meat Science and Technology (Ed.) Journée d’étude MICROBIOLOGIE ET VIANDE : QUE FAIRE DEMAIN ? (2006)

Même si elles peuvent contribuer de manière très spectaculaire à la maîtrise de la qualité microbiologique des aliments, les techniques de conservation elles-mêmes ne sont pourtant qu’un moyen de maîtrise ... [more ▼]

Même si elles peuvent contribuer de manière très spectaculaire à la maîtrise de la qualité microbiologique des aliments, les techniques de conservation elles-mêmes ne sont pourtant qu’un moyen de maîtrise parmi d’autres… Deux facteurs principaux sont tout simplement la qualité initiale –en particulier la qualité microbiologique- des aliments ou des ingrédients qui les constituent et l’hygiène observée au cours de leur production, de leur transformation et de leur distribution. De plus, un effet « obstacle » n’est reproductible que dans des conditions précises, par exemple pour ce qui concerne le nombre de microorganismes, la composition de l’aliment, les conditions d’ambiance, etc… Une technique de conservation doit donc être validée dans des conditions données (p.ex. par validation de la durée de vie microbiologique permettant d’estimer la D.L.C. d’un produit). Toute modification de ces conditions ne permet plus de garantir la maîtrise de la qualité microbiologique. Il convient par ailleurs d’évaluer l’effet d’une contamination accidentelle de la denrée par un microorganisme pathogène, au cours de sa production, de sa transformation ou de sa distribution (test de croissance après inoculation artificielle de la denrée, encore appelé « challenge testing »). L’établissement et le respect de critères microbiologiques, de bonnes pratiques de fabrication et de procédures d’assurance qualité sont des points clés de la maîtrise de la qualité et de la sécurité sanitaire des aliments. Des progrès significatifs sont en cours et sont encore attendus dans les prochaines années. [less ▲]

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See detailRange-dependence Issues in Multistatic STAP-based Radar
Neyt, Xavier; Acheroy, Marc; Verly, Jacques ULg

Conference (2006)

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See detailSauvage... le chat l'est-il toujours autant qu'on le souhaite ?
Le Proux de la Rivière, Bettina; Libois, Roland ULg

Learning material (2006)

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