References of "2006"
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See detailPhotography as diagnosis of contemporaneity
Dondero, Maria Giulia ULg

in Baetens, Jan; Van Gelder, Hilde (Eds.) Critical Realism in Contemporary Art. Around Allan Sekula’s Photography (2006)

Cet article porte sur l’efficacité politique d’une série photographique qui problématise des questions socioculturelles contemporaines telles l’immigration, l’exploitation et l’éthique du travail. L’image ... [more ▼]

Cet article porte sur l’efficacité politique d’une série photographique qui problématise des questions socioculturelles contemporaines telles l’immigration, l’exploitation et l’éthique du travail. L’image photographique devient une ressource dans les mains des acteurs sociaux et fait fonction de diagnostic des tensions du contemporain. La photographie permet de «reconnaître à travers» (c’est-à-dire « diagnostiquer ») et de formuler des jugements. Le potentiel sémantique du diagnostic engendré par cette série et la force illocutoire des jugements qui y sont inscrits fonctionnent comme une sorte d’« argumentation par images ». L’analyse de cette série photographique, réalisée par le photographe et théoricien Allan Sekula, nous a amené à nous interroger sur la relation entre image, corpus, genres d’afférence et statuts (documentaire et artistique). [less ▲]

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See detailUne mesure agri-environnementale au service des messicoles
Legast, Marie ULg

Diverse speeche and writing (2006)

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See detail"Dies verhüllte Genießen der Musik ohne Töne" : Robert Schumanns Reflexionen über das Medium Schrift.
Viehöver, Vera ULg

in Herwig, Henriette; Kalisch, Volker; Kortländer, Bernd (Eds.) et al ^Übergänge : Zwischen Künsten und Kulturen : Akten des Kongresses zum 150. Todestag von Heinrich Heine und Robert Schumann (2006)

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See detailNew validation strategy for the LC determination of ascorbic acid in sublingual tablets
Cahay, B.; Rousseau, Anne ULg; Klinkenberg, R. et al

Poster (2006)

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See detail(Micro)-structural comparison between geopolymers, alkali-activated slag cement and Portland cement
Lecomte, I.; Henrist, Catherine ULg; Duyckaerts, Monique ULg et al

in Journal of the European Ceramic Society (2006), 26(16), 3789-3797

Concurrently to research conducted on ordinary Portland cement (PC), new types of binders were developed during the last decades. These are formed by alkali-activation of metakaolin or ground-granulated ... [more ▼]

Concurrently to research conducted on ordinary Portland cement (PC), new types of binders were developed during the last decades. These are formed by alkali-activation of metakaolin or ground-granulated blast furnace slag (GGBFS) and are named, respectively, geopolymers (GP) or alkali-activated slag (AAS). Four different cementitious materials were synthesised: PC, AAS, GP, and a mix GP-AAS and fully compared about their compositions and (micro)-structures. X-ray diffraction has revealed the presence of semi-crystalline C-S-H gel binding phase in PC while AAS, GP and GP-AAS are nearly amorphous. Progressive structural changes have been observed between the different samples by means of infrared spectroscopy, Si-29 and At-27 magic-angle-spinning nuclear magnetic resonance spectroscopy: there is a polymerisation extent of the (alumino)-silicate framework from PC [SiQ(1) and SiQ(2) units] to AAS [SiQ(2) and SiQ(2)(1Al) units] and finally to GP [SiQ(4)(2Al) and SiQ(4)(3Al) units]. Scanning electron microscopy has shown that GP is a homogeneous matrix while the other materials are composites containing GGBFS grains surrounded by a binding matrix. Energy dispersive X-ray EDX analyses (line scans) have shown the absence of formation of any specific phase at the matrix-grains interfaces. (c) 2006 Elsevier Ltd. All rights reserved. [less ▲]

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See detailIntrogressions interspecifiques chez le cotonnier.
Mergeai, Guy ULg

in Cahiers Agricultures (2006), 15(1),

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See detailCorrelation of Experimental and Numerical Results on Electrostatically Actuated Micro-Beams
Rochus, Véronique ULg; Rixen, Daniel; Golinval, Jean-Claude ULg

in Technical Proceedings of the 2006 NSTI Nanotechnology Conference and Trade Show (2006), 3

The aim of this paper is to validate numerical simula- tions of electromechanical coupling in micro-structures using some experimental results. The micro-structures studied here consist in a micro-bridge ... [more ▼]

The aim of this paper is to validate numerical simula- tions of electromechanical coupling in micro-structures using some experimental results. The micro-structures studied here consist in a micro-bridge and two cantilever micro-beams. Multi-physics models of micro-electro- mechanical systems (MEMS) based on the ¯nite ele- ment method (FEM) are used to model the strongly coupled electro-mechanical interactions and to perform static analyses taking into account large displacements. In all the cases treated here the numerical results are in very good agreement with the experimental results. [less ▲]

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See detailRelever les défis environnementaux pour les filières cotonnières
Abou Abba,, A.; Hofs, Jean-Luc; Mergeai, Guy ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2006)

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See detailLes laboratoires accrédités saisis par l'incertitude
Feinberg, Max; Laurentie, M.; Hubert, Philippe ULg et al

Conference (2006)

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See detailQuand l'incontinentia pigmenti défie un dogme.
Willemaers, Valentine; Lizin, V. A.; Quatresooz, Pascale ULg et al

in Dermatologie Actualité (2006), 95

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See detailThree-dimensional finite element modeling of inductive and capacitive effects in micro-coils
Dular, Patrick ULg; V Sabariego, Ruth ULg; Kuo-Peng, Patrick

in COMPEL (2006), 25(3), 642-651

Purpose - The paper seeks to develop dual 3D finite element (FE) formulations for modeling both inductive and capacitive effects in massive inductors, in particular micro-coils. The paper aims to build ... [more ▼]

Purpose - The paper seeks to develop dual 3D finite element (FE) formulations for modeling both inductive and capacitive effects in massive inductors, in particular micro-coils. The paper aims to build circuit relations relating the voltages and the currents in such inductors to be used in circuit coupling. Design/methodology/approach - A circuit relation involving a unique voltage and complementary inductive and capacitive currents is defined for each inductor. the inductive circuit relation is first classically obtained by a FE magnetodynamic model. Then, the capacitive relation is obtained through a FE electric model, using sources evaluated from the first model. The conformity is defined on one hand for the magnetic flux density and the electric field, and on the other hand for the magnetic field and the electric flux density. Mixed FE, i.e. nodal, edge and face elements, are used to satisfy each chosen conformity level for the unknown fields and to naturally define the involved global quantities, i.e. the voltages, currents and charges. Findings - This contribution points out the interest of satisfying conformity properties for the coupled magnetic and electric problems. An accurate computation of these effects is obtained in the critical frequency range of their strong interaction. In addition, the complementarity of dual solutions gives the possibility to estimate the discretisation error. Originality/value - The mathematical and discretisation tools for any wished conformity level are unified for naturally coupling magnetic and electric problems. The global quantities basis functions involved in the FE circuit relations benefit from a significant support reduction, which facilitates their evaluation and gives them direct physical interpretations. [less ▲]

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See detailTHERMOELASTIC DAMPING IN VIBRATING BEAM ACCELEROMETER: A NEW THERMOELASTIC FINITE ELEMENT APPROACH
Lepage, Séverine; Le Traon, Olivier; KLapka, Igor et al

Conference given outside the academic context (2006)

In order to respond to the demand of accurate miniature inertial navigation systems, ONERA has been working on the design of a vibrating beam accelerometer called the Vibrating Inertial Accelerometer (VIA ... [more ▼]

In order to respond to the demand of accurate miniature inertial navigation systems, ONERA has been working on the design of a vibrating beam accelerometer called the Vibrating Inertial Accelerometer (VIA). The accuracy of the VIA is directly related to the thermoelastic quality factor of its sensitive element, which is a beam made of quartz. In this work, thermopiezoelectric finite element analyses of the beam are carried out in order to determine the thermoelastic quality factor. These finite element results are compared to the analytical and experimental quality factors. Due to their inherent restrictive assumptions, analytical models overestimate the quality factor while the finite element results are in good agreement with the experimental values. As the finite element model allows to take into account the real geometry of the beam and the piezoelectricity of the material, it allows to quantify more precisely the thermoelastic quality factor. [less ▲]

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See detailAléas climatiques versus actions anthropiques dans le développement des processus de « désertification » sur les marges sud et nord du Sahara
Taibi, Aude Nuscia; El Hannani, Mustapha; Gassani, Jean et al

in Interactions Nature-Société, analyses et modèles (2006)

Les marges sud et nord du Sahara sont soumises à des processus de dégradation anciens attestés par de nombreux travaux de terrain. Ils coïncident avec l'occurrence d'une sécheresse sévère sur les 3 sites ... [more ▼]

Les marges sud et nord du Sahara sont soumises à des processus de dégradation anciens attestés par de nombreux travaux de terrain. Ils coïncident avec l'occurrence d'une sécheresse sévère sur les 3 sites d'étude, débutée dans les années 1970 en Algérie (piémont sud de l'Atlas Saharien), au Maroc (bassin de l'oued Dadès) et en Mauritanie (lac d'Aleg, Brakna). Les suivis diachroniques par télédétection satellitaire (Landsat et SPOT) et aérienne (1954 à 2002) et des observations récentes, montrent la pérennité voire l'extension de certaines zones de dégradation localisées à proximité des agglomérations et points d'eau, malgré le retour des précipitations. Le rythme et les modalités de développement des dynamiques en œuvre, qui prennent la forme d'une dégradation qualitative et quantitative des couverts végétaux steppiques et de savane ainsi qu'une revivification des dunes d'Aleg, attestent du rôle prépondérant de certains activités humaines dans les processus de dégradation de ces milieux, en corrélation avec la crise climatique dont on peut se demander si elle n'est pas devenue un facteur secondaire. Sans ignorer les enjeux socio-économiques de développement, notre démarche vise à comprendre les logiques d'action des dynamiques complexes parfois abusivement désignées sous le terme simplificateur de «désertification». [less ▲]

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See detailInter- and intra-guild interactions related to aphids in nettle (Urtica dioica L.) strips closed to field crops.
Alhmedi, A.; Haubruge, Eric ULg; Bodson, Bernard ULg et al

in Communications in Agricultural and Applied Biological Sciences (2006), 71(2 Pt B), 413-23

A field experiment designed to assess the biodiversity related to nettle strips closed to crops, and more particularly the aphid and related beneficial populations, was established in experimental farm ... [more ▼]

A field experiment designed to assess the biodiversity related to nettle strips closed to crops, and more particularly the aphid and related beneficial populations, was established in experimental farm located in Gembloux (Belgium). Margin strips of nettle (Urtica dioica) closed to wheat (Triticum aestivum), green pea (Pisum sativum) and rape (Brassicae napus) fields were investigated. The diversity, abundance of aphids and related predators were analysed according to the plant crop species and the differential pesticide application (treated plot and control). Insects were visually observed every week during all the cultivation season. Two main families of aphidophagous predators were found in all field crops and nettle, the Coccinellidae and Syrphidae. The diversity of the aphidophagous predators was shown to be higher on nettle than in field crops, particularly the Chrysopidae, the Anthocoridae and the Miridae. However, a striking difference of ladybird abundance was observed according to the aphid host plant. In one side, Coccinella septempunctata was much more abundant on Acyrthosiphon pisum infested green pea than on the other host plant species. At the opposite, higher occurrence of Harmonia axyridis was observed on the aphid infested nettle plants than on the crop plants. In particular, none of H. axyridis was found in wheat crop. Also, more than only a significant positive correlation between predator and aphid abundance, specialised relations between particular aphid species and some so-called generalist predators was determined in the fields. Finally, intraguild interactions between the aphidophagous predators was assessed and shown that only a significant negative correlation between Episyrphus balteatus and H. axyridis related to the nettle aphid, Micrlophium carnosum, was observed. The relative distribution of the ladybirds, namely C. septempunctata and H. axyridis according to the host plant, nettle strips and crop plots was discussed in relation to integrated pest management approach. [less ▲]

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