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Peer Reviewed
See detailElaboration of tantalum oxide and carbon nanotubes composite coatings on titanium for biomaterial applications
Maho, Anthony ULg; Linden, Stéphanie; Arnould, Christelle et al

Poster (2011)

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See detailElaboration of Thin Foils in Copper and Zinc by Self-Induced Ion Plating
Giraud, Eliane; Pace, Sergio ULg; Lecomte-Beckers, Jacqueline ULg

in Materials Science (2014), 20(2), 160-164

The aim of this work was to determine the ability to produce thin metallic foils by self-induced ion plating. Foils of pure copper and pure zinc with a thickness of 35 μm have been successfully produced ... [more ▼]

The aim of this work was to determine the ability to produce thin metallic foils by self-induced ion plating. Foils of pure copper and pure zinc with a thickness of 35 μm have been successfully produced and their characteristics have been compared to foils obtained by conventional techniques (i. e. electroplating and rolling). Results show the following: (i) more or less compact microstructures can be obtained by self-induced ion plating depending on gas pressure and substrate temperature; (ii) microstructures obtained by self-induced ion plating are quite different from those obtained by electroplating and rolling; (iii) Young’s modulus depends on foils roughness; (iv) hardness depends on grain size by exhibiting a Hall-Petch behavior in the case of copper foils and an “inverse” Hall-Petch behavior in the case of zinc foils. [less ▲]

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See detailÉlaborer et utiliser des fix maison sur Aleph
Renaville, François ULg; Richelle, Laurence ULg

Learning material (2011)

À côté de toutes les procédures fix standard appelables via tab_fix, il est possible sur Aleph d'élaborer des fix plus personnalisés (simples ou relativement complexes) permettant aux bibliothèques de ... [more ▼]

À côté de toutes les procédures fix standard appelables via tab_fix, il est possible sur Aleph d'élaborer des fix plus personnalisés (simples ou relativement complexes) permettant aux bibliothèques de modifier, enrichir, corriger, voire supprimer des parties de notices (BIB, HOL, AUT...) en Aleph séquentiel. Également combinables avec tab_expand, ces fix maison peuvent aussi se limiter à l'affichage des données dans le GUI ou l'opac. [less ▲]

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See detailL'élagage des arbres d'alignement : adéquation entre physiologie et économie
Toussaint, André ULg; Kervyn de Meerendre, V.; Delcroix, B. et al

Conference given outside the academic context (2003)

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See detailElargir l’Europe jusqu’où et comment ?
Michel, Quentin ULg

Conference given outside the academic context (2011)

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See detailÉlargissement de la base génétique de la principale espèce de cotonnier cultivé Gossypium hirsutum L. par la création et l’exploitation de lignées monosomiques d’addition
Sarr, D.; Mergeai, Guy ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2009), 13(1), 187-201

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See detailElargissement du domaine d'application du règlement thermique wallon
Hauglustaine, Jean-Marie ULg; Vandendries, P.; Wauthy, Y.

Book published by CSTC (1988)

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See detailL'élargissement vers la Croatie : un succès de la diplomatie européenne
Lika, Liridon ULg

Article for general public (2013)

Ce 1er juillet 2013, après six années de négociations avec l’Union européenne (UE) et de réformes laborieuses, la Croatie deviendra le 28ème État membre à part entière de la famille européenne. Après la ... [more ▼]

Ce 1er juillet 2013, après six années de négociations avec l’Union européenne (UE) et de réformes laborieuses, la Croatie deviendra le 28ème État membre à part entière de la famille européenne. Après la Slovénie, membre depuis 2004, il s’agit du deuxième pays sortant de la dissolution violente de l’ex-Yougoslavie à rejoindre l’UE. Contrairement à son voisin slovène où les hostilités n’ont duré que quelques jours, la Croatie a connu plusieurs années de guerre et de destruction. Raison pour laquelle elle a été confrontée à une longue période de transition. Depuis son indépendance en 1991, tous les gouvernements croates ont engagé, un processus de consolidation de leur État. Ensuite ils ont consacré leur force à l’adhésion de leur pays à l’Organisation du traité de l’Atlantique Nord (OTAN), concrétisée en 2009, enfin ils ont travaillé à leur entrée dans l’UE. Mais quel intérêt l’Union a-t-elle à voir ces pays la rejoindre ? [less ▲]

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See detailElastase-induced pulmonary emphysema in rats: comparison of computed density and microscopic morphometry.
Onclinx, Cecile; De Maertelaer, Viviane; Gustin, Pascal ULg et al

in Radiology (2006), 241(3), 763-70

PURPOSE: To prospectively compare computed tomographic (CT) quantification of pulmonary emphysema in elastase-treated rats with morphometry and to evaluate the information yielded by CT quantification and ... [more ▼]

PURPOSE: To prospectively compare computed tomographic (CT) quantification of pulmonary emphysema in elastase-treated rats with morphometry and to evaluate the information yielded by CT quantification and pulmonary function tests. MATERIALS AND METHODS: This study was approved by the local committee on care and use of animals in research. Thirty-six animals were used. Emphysema was produced by means of one or two tracheal injections of 300 IU of elastase, 8 weeks apart, in seven and 12 rats, respectively. As a control group, 10 rats received an injection of normal saline. The dynamic resistance, dynamic compliance, and static compliance were measured. CT was performed with 1-mm section thickness and 3-mm intervals. Relative areas of lung with attenuation coefficients lower than nine chosen thresholds (from -900 to -980 HU) and eight percentiles (from 1st to 18th percentiles) of the distribution of attenuation coefficients were compared with measurements of alveoli size--that is, mean interwall distance (MIWD) and mean perimeter per field (MP). Correlations between data obtained with thresholds and percentiles and MIWD and MP were investigated by means of Spearman coefficients (r(s)). Values of pulmonary function tests, most appropriate relative area threshold, and percentile were investigated by means of stepwise multiple regressions. RESULTS: For thresholds, relative surface area with attenuation coefficients less than -940 HU (RA(940)) showed the strongest correlations with findings at microscopy (r(s) = 0.676, P < .001 for MIWD; r(s) = -0.720, P < .001 for MP). For percentiles, the 3rd percentile showed the strongest correlations (r(s) = -0.647, P < .001 for MIWD; r(s) = 0.701, P < .001 for MP). Dynamic compliance and RA(940) or 3rd percentile were complementary for predicting microscopic measurements. CONCLUSION: In rats, RA(940) and the 3rd percentile reflect the extent of elastase-induced pulmonary emphysema and are complementary to dynamic compliance to predict microscopic extent. [less ▲]

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See detailElastic and inelastic transmission in guided atom lasers: A truncated Wigner approach
Dujardin, Julien ULg; Argüelles, Arturo; Schlagheck, Peter ULg

in Physical Review A (2015), 91

We study the transport properties of a Bose-Einstein condensate formed by an ultracold gas of bosonic atoms that is coupled from a magnetic trap into a one-dimensional waveguide. Our theoretical approach ... [more ▼]

We study the transport properties of a Bose-Einstein condensate formed by an ultracold gas of bosonic atoms that is coupled from a magnetic trap into a one-dimensional waveguide. Our theoretical approach to tackling this problem is based on the truncated Wigner method for which we assume the system to consist of two semi-infinite noninteracting leads and a finite interacting scattering region with two constrictions modeling an atomic quantum dot. The transmission is computed in the steady-state regime and we find a good agreement between truncated Wigner and matrix-product state calculations. We also identify clear signatures of inelastic resonant scattering by analyzing the distribution of energy in the transmitted atomic-matter wave beam. [less ▲]

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See detailElastic behaviour of bolted connection between cylindrical steel structure and concrete foundation
Hoang, Van Long ULg; Jaspart, Jean-Pierre ULg; Tran Xuan-Hoang et al

in Journal of Constructional Steel Research (2015), 115

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Peer Reviewed
See detailElastic behaviour of dock beetle adhesive structures
Gernay, Sophie-Marie ULg; Federle, Walter; Lambert, Pierre et al

Conference (2014, January)

The adhesion of many insects is mediated by liquid capillary bridges formed at the tips of multiple hair like structures (called setae) under their feet. Resulting adhesion forces can exceed a hundred ... [more ▼]

The adhesion of many insects is mediated by liquid capillary bridges formed at the tips of multiple hair like structures (called setae) under their feet. Resulting adhesion forces can exceed a hundred times the insect’s body weight and they are effective on a large variety of substrates, controllable in very short times and self cleaning. The underlying mechanism leading to these properties involves a complex coupling between the high aspect-ratio structures and the dynamic evolution of the liquid meniscus. In this experimental work, we concentrate on the role played by the compliance of seta tips. We analyse in detail their surface contact and deflection for perpendicular loading using interference microscopy. Challenges related to the micrometric scale of the phenomenon and the tiny amount of liquid are addressed. The results are rationalized through the lens of elasto-capillarity theory. [less ▲]

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See detailElastic damage to crack transition in a coupled non-local implicit discontinuous Galerkin/extrinsic cohesive law framework
Wu, Ling ULg; Becker, Gauthier ULg; Noels, Ludovic ULg

in Computer Methods in Applied Mechanics & Engineering (2014), 279

One current challenge related to computational fracture mechanics is the modeling of ductile fracture and in particular the damage to crack transition. On the one hand, continuum damage models, especially ... [more ▼]

One current challenge related to computational fracture mechanics is the modeling of ductile fracture and in particular the damage to crack transition. On the one hand, continuum damage models, especially in their non-local formulation which avoids the loss of solution uniqueness, can capture the material degradation process up to the localization of the damage, but are unable to represent a discontinuity in the structure. On the other hand cohesive zone methods can represent the process zone at the crack tip governing the crack propagation, but cannot account for the diffuse material damaging process. In this paper we propose to combine, in a small deformations setting, a non-local elastic damage model with a cohesive zone model. This combination is formulated within a discontinuous Galerkin nite element discretization. Indeed this DG weak formulation can easily be developed in a non-local implicit form and naturally embeds interface elements that can be used to integrate the traction separation law of the cohesive zone model. The method remains thus consistent and computationally e cient as compared to other cohesive element approaches. The effects of the damage to crack transition and of the mesh discretization are respectively studied on the compact tension specimen and on the double-notched specimen, demonstrating the efficiency and accuracy of the method. [less ▲]

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See detailElastic meson nucleon and nucleon nucleon scattering: Models vs. all available data
Martynov, E.; Cudell, Jean-René ULg; Lengyel, A.

in Nicolescu, B. (Ed.) 11th International Conference On Elastic And Diffractive Scattering: Towards High Energy Frontiers: The 20th Anniversary Of The Blois Workshops (2005)

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See detailElastic properties of the oesophageal wall in the dynamic measurement of intrathoracic pressure in cattle
Lekeux, Pierre ULg; Hajer, R.; Breukink, H. J.

in Research in Veterinary Science (1984), 37(3), 366-367

The elastance of the midthoracic portion of the oesophagus was measured in 14 healthy Dutch Friesians. These were divided into three groups with mean ages of six, 126 and 1636 days, respectively. Mean ... [more ▼]

The elastance of the midthoracic portion of the oesophagus was measured in 14 healthy Dutch Friesians. These were divided into three groups with mean ages of six, 126 and 1636 days, respectively. Mean elastance was 0.17, 0.10 and 0.06 kPa ml-1, respectively. The calculated percentage of error, in relating the endoesophageal pressure with that in the thorax, was found to be smaller than 1 per cent for each animal. [less ▲]

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See detailElastic scattering of vortex electrons provides direct access to the Coulomb phase
Ivanov, Igor ULg; Seipt, Daniel; Surzhykov, Andrey et al

in Physical Review. D : Particles and Fields (2016), 94(7), 076001

Vortex electron beams are freely propagating electron waves carrying adjustable orbital angular momentum with respect to the propagation direction. Such beams were experimentally realized just a few years ... [more ▼]

Vortex electron beams are freely propagating electron waves carrying adjustable orbital angular momentum with respect to the propagation direction. Such beams were experimentally realized just a few years ago and are now used to probe various electromagnetic processes. So far, these experiments used the single vortex electron beams, either propagating in external fields or impacting a target. Here, we investigate the elastic scattering of two such aligned vortex electron beams and demonstrate that this process allows one to experimentally measure features which are impossible to detect in the usual plane-wave scattering. The scattering amplitude of this process is well approximated by two plane-wave scattering amplitudes with different momentum transfers, which interfere and give direct experimental access to the Coulomb phase. This phase (shift) affects the scattering of all charged particles and has thus received significant theoretical attention but was never probed experimentally. We show that a properly defined azimuthal asymmetry, which has no counterpart in plane-wave scattering, allows one to directly measure the Coulomb phase as function of the scattering angle. [less ▲]

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