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See detailExpression of the "glanded-plant and glandless-seed" trait of Australian diploid cottons in different genetic backgrounds.
Benbouza, Halima; Lognay, Georges ULg; Scheffler, Jodi et al

in Euphytica : International Journal of Plant Breeding (2009), 165(2), 211-221

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See detailAdsorption of essential oil components of Xylopia aethiopica (Annonaceae) by kaolin from Wak, Adamawa province (Cameroon).
Nguemtchouin, M. M. G.; Ngassoum, M. B.; Ngamo, L. S. T. et al

in Applied Clay Science (2009), 44(1-2), 1-6

Essential oils of aromatic plants are nowadays cited as suitable tools for better protection of stored grains from insect pest attacks. These chemical insecticides are less attractive to producers because ... [more ▼]

Essential oils of aromatic plants are nowadays cited as suitable tools for better protection of stored grains from insect pest attacks. These chemical insecticides are less attractive to producers because of their low persistence and difficulty to use as pure product. There is therefore a need to formulate themas an easy handling chemical with better persistence. The present work aimed to study the formulation through adsorption of active components of Xylopia aethiopica Dunal (Annonaceae) essential oil on kaolin. X. aethiopica essential oil was obtained by hydrodistillation in a Clevenger type apparatus unit. Essential oil obtained was analysed by a GC–FID and a GC–MS. The adsorption measurements were performed with collected two kaolin fractions (F1 <100 μm; F2 <50 μm) and two kaolin fractions after H2O2 treatment (F3 <50 μm; F4 <2 μm). The kaolin was characterized by XRD, XRF, FTIR; its specific surface area was determined by the B.E.T method. The amount of essential oil adsorbed was inversely proportional to the particles size. Treatment of kaolin with hydrogen peroxide increased the adsorption capacity of essential oil components. The components adsorbed in highest amounts were sabinene, β-pinene, α-pinene and β-phellandrene. [less ▲]

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See detailNon, les cabinets d'avocats ne sont pas des banques données!
Jacobs, Ann ULg; Henry, Patrick

in Revue de Jurisprudence de Liège, Mons et Bruxelles (2009), 19

Etat de la jurisprudence belge en matière de perquisitions dans les cabinets d'avocats; critique de cette jurisprudence au regard de la jurisprudence de la Cour européenne des droits de l'homme et ... [more ▼]

Etat de la jurisprudence belge en matière de perquisitions dans les cabinets d'avocats; critique de cette jurisprudence au regard de la jurisprudence de la Cour européenne des droits de l'homme et propositions de changements. [less ▲]

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See detailTransition from turbulent to nearly laminar vortex flow in superconductors with periodic pinning
Gutierrez, J.; Silhanek, Alejandro ULg; Van de Vondel, J. et al

in Physical Review. B : Condensed Matter (2009), 80(14),

We revisit the vortex dynamics in Al thin films containing an artificial periodic array of antidots by means of electrical transport measurements. We clearly identify a turbulent to laminarlike vortex ... [more ▼]

We revisit the vortex dynamics in Al thin films containing an artificial periodic array of antidots by means of electrical transport measurements. We clearly identify a turbulent to laminarlike vortex flow transition which manifests itself as a negative differential resistivity. This transition is accompanied by a strong irreversibility in the voltage-current characteristics. The dynamical phase diagrams obtained as a function of commensurability, temperature, and driving force are in good agreement with the early predictions by Reichhardt et al. [Phys. Rev. Lett. 78, 2648 (1997)] based on molecular dynamic simulations. [less ▲]

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See detailDéveloppement de l'entre-soi communautaire dans les espaces résidentiels périurbains
Teller, Jacques ULg

in Déviance et Société (2009), 33

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See detailChaotic dynamics of a Bose-Einstein condensate coupled to a qubit
Martin, John ULg; Georgeot, B.; Shepelyansky, D. L.

in Physical Review. E : Statistical, Nonlinear, and Soft Matter Physics (2009), 79

We study numerically the coupling between a qubit and a Bose-Einstein condensate (BEC) moving in a kicked optical lattice, using Gross-Pitaevskii equation. In the regime where the BEC size is smaller than ... [more ▼]

We study numerically the coupling between a qubit and a Bose-Einstein condensate (BEC) moving in a kicked optical lattice, using Gross-Pitaevskii equation. In the regime where the BEC size is smaller than the lattice period, the chaotic dynamics of the BEC is effectively controlled by the qubit state. The feedback effects of the nonlinear chaotic BEC dynamics preserve the coherence and purity of the qubit in the regime of strong BEC nonlinearity. This gives an example of an exponentially sensitive control over a macroscopic state by internal qubit states. At weak nonlinearity quantum chaos leads to rapid dynamical decoherence of the qubit. The realization of such coupled systems is within reach of current experimental techniques. [less ▲]

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See detailP2X1 Ion Channels Promote Neutrophil Chemotaxis through Rho Kinase Activation
Lecut, Christelle ULg; Frederix, Kim ULg; Johnson, Daniel M et al

in Journal of Immunology (2009)

This study shows that activation of P2X1 ion channels by ATP promotes neutrophil chemotaxis, a process involving Rho kinase-dependent actomyosin-mediated contraction at the cell rear. These ion channels ... [more ▼]

This study shows that activation of P2X1 ion channels by ATP promotes neutrophil chemotaxis, a process involving Rho kinase-dependent actomyosin-mediated contraction at the cell rear. These ion channels may therefore play a significant role in host defense and inflammation. [less ▲]

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See detailMorphological and allozyme variation in a collection of Lagenaria siceraria (Molina) Standl. from Côte d'Ivoire
Koffi, K. K.; Baudoin, Jean-Pierre ULg; Malice, Marie et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2009), 13(2), 257-281

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See detailUtilisation des enzymes en alimentation porcine et avicole
Beckers, Yves ULg; Piron, Fabien ULg

in CRA-W (Ed.) Impact de l'alimentation sur la santé animale : nouveaux développements (2009)

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See detailQu'est-ce que la relativité générale?
De Rop, Yves ULg

Article for general public (2009)

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See detailLa connaissance partielle chez le patient : pourquoi et comment la mesurer
Leclercq, Dieudonné ULg

in Education Thérapeutique du Patient [=ETP] = Therapeutic Patient Education [=TPE] (2009), 1(2), 201-212

Introduction: The certainty or the doubt, justified or not, a patient has in his knowledge about his illness influences largely his decision to act or, on the contrary, to verify, to ask for help ... [more ▼]

Introduction: The certainty or the doubt, justified or not, a patient has in his knowledge about his illness influences largely his decision to act or, on the contrary, to verify, to ask for help. Nevertheless, in the process of knowledge assessment, in patient education as well as in classical training systems, respondants are too rarely asked to provide, in addition to each answer to each question, a degree of certainty. Objectives: This paper explains how to collect these degrees of certainty, namely with the help of a spectral test applied in oral mode, and how to interpret and use these data in a formative perspective. Description:Metacognitive concepts and indices are developed and illustrated as well as graphical representations. Examples are provided in the domain of diabetic patients education. Conclusions: Spectral analysis of the responses’ qualities is useful to measure individual patients’ degree of mastery as well as to evaluate the efficacy of a training applied to a group of patients. [less ▲]

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See detailSurvey of air-ice ocean carbon dioxyde exchange over arctic sea-ice
Heinesch, Bernard ULg; Aubinet, Marc ULg; Carnat, Gauthier et al

Conference (2009)

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See detailImproving in-row weed detection in multispectral stereoscopic images
Piron, Alexis ULg; Leemans, Vincent ULg; Lebeau, Frédéric ULg et al

in Computers & Electronics in Agriculture (2009), 69

Previous research has shown that plant height and spectral reflectance are relevant features to classify crop and weeds in organic carrots: classification based on height gave a classification accuracy ... [more ▼]

Previous research has shown that plant height and spectral reflectance are relevant features to classify crop and weeds in organic carrots: classification based on height gave a classification accuracy (CA) of up to 83% while classification based on a combination of three multispectral bands gave a CA of 72%. The first goal of this study was to examine the simultaneous use of both height and multispectral parameters. It was found that classification rate was only slightly improved when using a feature set comprising both height and multispectral data (2%). The second goal of this study was to improve the detection method based on plant height by setting an automatic threshold between crop and weeds heights, in their early growth stage. This threshold was based on crop row determination and peak detection in plant height probability density function, corresponding to the homogeneous crop population. Using this method, the CA was 82% while the CA obtained with optimal plant height limits is only slightly higher at 86%. [less ▲]

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See detailEffects of aging and daytime recovery sleep on N-REM slow oscillations
Lafortune, M; Viens, I; Poirier, G et al

in Sleep (2009), 32(Suppl. 1),

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See detailNeural correlates mediating the consolidation of visuomotor adapted actions : A study on the role of night sleep versus the passage of daytime
Debas, Karen; Carrier, Julie; Orban, Pierre et al

in NeuroImage (2009), 45(Suppl. 1),

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See detailAdiabatic invariance along the reaction coordinate
Lorquet, Jean-Claude ULg

in Journal of Chemical Physics (2009), 130(2), 024307

In a two-dimensional space where a point particle interacts with a diatomic fragment, the action integral Φ pθ dθ (where θ is the angle between the fragment and the line of centers and pθ its conjugate ... [more ▼]

In a two-dimensional space where a point particle interacts with a diatomic fragment, the action integral Φ pθ dθ (where θ is the angle between the fragment and the line of centers and pθ its conjugate momentum) is an adiabatic invariant. This invariance is thought to be a persistent dynamical constraint. Indeed, its classical Poisson bracket with the Hamiltonian is found to vanish in particular regions of the potential energy surface: asymptotically, at equilibrium geometries, saddle points, and inner turning points, i.e., at remarkable situations where the topography of the potential energy surface is locally simple. Studied in this way, the adiabatic decoupling of the reaction coordinate is limited to disjoint regions. However, an alternative view is possible. The invariance properties of entropy (as defined in information theory) can be invoked to infer that dynamical constraints that are found to operate locally subsist everywhere, throughout the entire reactive process, although with a modified expression. © 2009 American Institute of Physics. [less ▲]

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See detailAdiabatic and diabatic invariants in ion-molecule reactions
Lorquet, Jean-Claude ULg

in Journal of Chemical Physics (2009), 131(24),

A point charge interacting with a dipole (either induced or permanent) constitutes a completely integrable dynamical subsystem characterized by three first integrals of the motion (E, pφ, and either 2 or ... [more ▼]

A point charge interacting with a dipole (either induced or permanent) constitutes a completely integrable dynamical subsystem characterized by three first integrals of the motion (E, pφ, and either 2 or a Hamilton-Jacobi separation constant Β). An ion-molecule reaction (capture or fragmentation) can be seen as an interaction between such a subsystem and a bath of oscillators. This interaction is a perturbation that destroys some of the first integrals. However, the perturbation depends on the separation between the fragments and the destruction is gradual. The mathematical simplicity of the long-range electrostatic interaction potential leads to useful simplifications. A first-order perturbation treatment based on the structured and regular nature of the multipole expansion is presented. The separating integrals valid in the asymptotic limit are found to subsist at intermediate distances, although in a weaker form. As the reaction coordinate decreases, i.e., as the fragments approach, the asymptotic range is followed by an outer region where (i) the azimuthal momentum pφ remains a constant of the motion; (ii) the square angular momentum 2 or the separation constant Β transform into a diabatic invariant in regions of phase space characterized by a high value of the translational momentum pr; (iii) for low values of pr, it is advantageous to use the action integral pθ dθ, which is an adiabatic invariant. The conditions under which an effective potential obtained by adding centrifugal repulsion to an electrostatic attractive term can be validly constructed are specified. In short, the dynamics of ion-molecule interactions is still regular in parts of phase space corresponding to a range of the reaction coordinate where the interaction potential deviates from its asymptotic shape. © 2009 American Institute of Physics. [less ▲]

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See detailIntegrated structure and control design for mechatronic systems with configuration-dependent dynamics
Da Silva, Maíra Martins; Bruls, Olivier ULg; Desmet, Wim et al

in Mechatronics (2009), 44(9), 10161025

This paper considers the optimal design of mechatronic systems with configuration-dependent dynamics. An optimal mechatronic design requires that, among the structural and control parameters, an optimal ... [more ▼]

This paper considers the optimal design of mechatronic systems with configuration-dependent dynamics. An optimal mechatronic design requires that, among the structural and control parameters, an optimal choice has to be made with respect to design specifications in the different domains. Two main challenges are treated in this paper: the non-convex nature of the optimization problem and the difficulty in modeling serial machines with flexible components and their embedded controllers. The optimization problem is treated using the direct design strategy which considers simultaneously structural and control parameters as variables and adopts non-convex optimization algorithms. Linear time-invariant and gain-scheduling PID controllers are addressed. This methodology is exploited for the multi-objective optimization of a pick-and-place assembly robot with a gripper carried by a variable-length flexible beam. The resulting design tradeoffs between system accuracy and control efforts demonstrate the advantage of an integrated design approach for mechatronic systems with configuration-dependent dynamics. 2009 Elsevier Ltd. All rights reserved. [less ▲]

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See detailDe l'axiologie
Verbeeck, Muriel ULg

in CeROArt : Conservation, Exposition, Restauration d'Objets d'Art (2009), 4

The choices in conservation and restoration are based on pre-eminent values. In literature as in the action, the reference to Riegl and Brandi has become classic: in particular the use of aesthetic and ... [more ▼]

The choices in conservation and restoration are based on pre-eminent values. In literature as in the action, the reference to Riegl and Brandi has become classic: in particular the use of aesthetic and historical instances. However, contemporary art as well as conservation applied to collections other than art claims other valid criteria. The author proposes to develop a system of values, where the concerns of various actors in the conservation and restoration could be explicitly articulated. It is indeed important to objectify decisions of intervention. [less ▲]

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