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See detailIntroduction : pour une troisième voie entre hack et yack ?
Dozo, Björn-Olav ULg

Conference (2016, November 24)

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See detailEvaluation du cursus  Sciences industrielles et de l’ingénieur industriel
Courard, Luc ULg

Conference given outside the academic context (2016)

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Peer Reviewed
See detailStatistical study of Saturn's auroral electron properties with Cassini/UVIS FUV spectral images
Gustin, Jacques ULg; Grodent, Denis ULg; Radioti, Aikaterini ULg et al

in Icarus (2016)

About 2000 FUV spectra of different regions of Saturn's aurora, obtained with Cassini/UVIS from December 2007 to October 2014 have been examined. Two methods have been employed to determine the mean ... [more ▼]

About 2000 FUV spectra of different regions of Saturn's aurora, obtained with Cassini/UVIS from December 2007 to October 2014 have been examined. Two methods have been employed to determine the mean energy 〈E〉 of the precipitating electrons. The first is based on the absorption of the auroral emission by hydrocarbons and the second uses the ratio between the brightness of the Lyman-α line and the H2 total UV emission (Lyα/H2), which is directly related to 〈E〉 via a radiative transfer formalism. In addition, two atmospheric models obtained recently from UVIS polar occultations have been employed for the first time. It is found that the atmospheric model related to North observations near 70° latitude provides the results most consistent with constraints previously published. On a global point of view, the two methods provide comparable results, with 〈E〉 mostly in the 7–17 keV range with the hydrocarbon method and 〈E〉 in the 1–11 keV range with the Lyα/H2 method. Since hydrocarbons have been detected on ∼20% of the auroral spectra, the Lyα/H2 technique is more effective to describe the primary auroral electrons, as it is applicable to all spectra and allows an access to the lowest range of energies (≤5 keV), unreachable by the hydrocarbon method. The distribution of 〈E〉 is found fully compatible with independent HST/ACS constraints (emission peak in the 840–1450 km range) and FUSE findings (emission peaking at pressure level ≤0.2 µbar). In addition, 〈E〉 exhibits enhancements in the 3 LT–10 LT sector, consistent with SKR intensity measurements. An energy flux–electron energy diagram built from all the data points strongly suggests that acceleration by field-aligned potentials as described by Knight's theory is a main mechanism responsible for electron precipitation creating the aurora. Assuming a fixed electron temperature of 0.1 keV, a best-fit equatorial electron source population density of 3 × 103 m−3 is derived, which matches very well to the plasma properties observed with Cassini MAG and CAPS/ELS instruments. However, several auroral regions are characterized by relatively high 〈E〉 and low energy flux, suggesting that additional processes such as plasma injections or magnetic reconnections must be accounted for to explain the emission in these regions. The Lyα/H2 ratio technique can be used to build maps of 〈E〉 from single spectral images. As expected, preliminary results show that the spatial distribution of 〈E〉 is not uniform, as seen on Jupiter. Our study reveals that a fraction of the aurora is due to very low energy electrons (<1 keV). Even in this case, comparisons between observed and modeled spectra show that 100 eV is a suitable value to represent the average energy of the secondary electrons. [less ▲]

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See detailPost-fire assessment of concrete structures. Safe for continued use?
Molkens, Tom; Gernay, Thomas ULg; Van Coile, Ruben

Conference (2016, November 24)

After a fire in a building, questions arise regarding the post-fire fire capacity of the structure. Assessment of post-fire capacity of structural elements should consider the residual safety level which ... [more ▼]

After a fire in a building, questions arise regarding the post-fire fire capacity of the structure. Assessment of post-fire capacity of structural elements should consider the residual safety level which, in the absence of codification, requires performing a full probabilistic analysis. Therefore, an easy-to-use method is presented which allows to make a probabilistic calculation, using only analytical formulas and a pre-calculated graph. The method is applied to a real case study, consisting of a fire that took place in an apartment building in Belgium, indicating sufficient load bearing capacity for further use. [less ▲]

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See detailAucun parti n’envisage de limiter les cumuls dans le temps
Grandjean, Geoffrey ULg

Article for general public (2016)

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See detailQu’en est-il des représentations du vieillissement dans notre société ? Quelles conséquences sur la santé de nos aînés ?
Missotten, Pierre ULg; Clesse, Audrey ULg

Conference given outside the academic context (2016)

Depuis des décennies, la vieillesse est abordée en termes médicaux ou de coûts sociétaux. N’est-il pas temps de tordre le cou aux idées reçues ? Même si la société évolue, nos perceptions du ... [more ▼]

Depuis des décennies, la vieillesse est abordée en termes médicaux ou de coûts sociétaux. N’est-il pas temps de tordre le cou aux idées reçues ? Même si la société évolue, nos perceptions du vieillissement sont encore trop souvent associées à la tristesse, la solitude, la maladie, l’exclusion ou l’angoisse. Autant de stéréotypes qui renforcent une image dégradée de la vieillesse et qui nécessite un changement de regard. Plusieurs études démontrent que nos seniors déclarent bien vivre, se sentent en bonne santé physique et psychologique, se jugent entourés et estiment que la vie leur procure du plaisir... Vieillir c'est accumuler des connaissances et développer de l'expertise, c'est vivre en se centrant davantage sur les informations positives au détriment des négatives. Cette conférence aura donc pour objectif d'amener à une vision plus réaliste (et donc moins pessimiste!) du vieillissement. Et l'enjeu est de taille: que nous soyons jeunes ou moins jeunes, notre vision du vieillissement a un impact important sur la santé physique et mentale des aînés! Si cette thématique vous interpelle ... [less ▲]

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See detailDevelopment of a new design method for steel hollow section members resistance
Hayeck, Marielle ULg

Doctoral thesis (2016)

This dissertation presents research done in the field of enhancing the performance and the carrying capacity of tubular members, through the development of an original design approach based on the ... [more ▼]

This dissertation presents research done in the field of enhancing the performance and the carrying capacity of tubular members, through the development of an original design approach based on the “Overall Interaction Concept” (O.I.C.). The proposed approach makes use of the interaction between the two ideal behaviours of structural members (resistance and instability) and includes the influence of initial imperfections (out-of straightness, residual stresses, non-homogenous material), to calculate the resistance of a structure through a single parameter: “relative slenderness”. A test program was carried out as a part of a European project named ‘HOLLOPOC’ to determine the experimental behaviour of beam-columns loaded by bi-axial bending with axial force. Twelve buckling tests, consisting of hot-rolled and cold-formed rectangular and circular hollow section members were conducted. These tests were accompanied by preliminary measurements of cross-section geometry, material properties, geometrical imperfections, residual stresses as well as stub column tests. Besides, a finite element model was calibrated on the basis of these tests. For both the present test series and another one from the literature, it was shown that the FE models were capable of replicating accurately the response and resistance of the experiments. Accordingly, the validated FE models have been further used in extensive numerical studies, and a database comprising more than seventy thousand results was built consecutively. Based on these computations, design proposals were made, by considering identified governing parameters, within the context of the Overall Interaction Concept, using an extension of the Ayrton-Perry approach. Finally, a safely evaluation was completed to check the proposed formulae against the results of current Eurocode 3 rules. [less ▲]

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See detailNaissance et prime jeunesse de l’Université de Liège, 1816-1835
Lanneau, Catherine ULg

Conference given outside the academic context (2016)

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See detailSustainability and management control. Exploring and theorizing control patterns in large European firms
Crutzen, Nathalie ULg; Zvezdov, Dimitar; Schaltegger, Stefan

in Journal of Cleaner Production (2016), Online version

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See detail“Toute l'âme résumée” de Mallarmé : un art poétique déjoué
Durand, Pascal ULg

Scientific conference (2016, November 23)

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See detailDes concepts en classe d'histoire : pourquoi et comment ?
Jadoulle, Jean-Louis ULg

Scientific conference (2016, November 23)

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See detailLaser Additive Manufacturing of Metal Matrix Composites
Mertens, Anne ULg

Learning material (2016)

Current trends in the mechanics and energy industries impose increasing demands on metallic materials, combining elevated service temperatures and severe mechanical solicitations. Metal matrix composite ... [more ▼]

Current trends in the mechanics and energy industries impose increasing demands on metallic materials, combining elevated service temperatures and severe mechanical solicitations. Metal matrix composite coatings with ceramic reinforcements are good candidates in view of fulfilling the requirements for an improved mechanical durability, and for other complex functions (e.g. self-lubrication, biocompatibility...). First of all, this paper provides an introduction to metal matrix composites with a particular attention for the process known as laser cladding that appears as a promising technology for making composite coatings. In this process, a (mixture of) metallic powder(s) is projected onto a substrate through a nozzle and simultaneously melted by a laser beam. Laser cladding is characterised by ultra-fast solidification and cooling rates, thus giving rise to ultra-fine microstructures and potentially enhanced mechanical properties. The paper thus focuses on the relationships between the thermal history during the production of a composite coating, and the resulting microstructure and properties, with special attention to the dissolution of ceramic particles (e.g. carbides) and to interfacial reactions taking place between the particles and the metallic matrix. [less ▲]

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See detailNon muro ma porta. Forza e fragilità al femminile nell'arte di Anna Mainardi
Bugini, Mariaelena ULg

Scientific conference (2016, November 23)

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See detailCOP22: What's next?
Ozer, Pierre ULg

Scientific conference (2016, November 23)

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See detailLe pervers, le psychopathe et les limites de l’empathie
Englebert, Jérôme ULg

Conference (2016, November 22)

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See detailIndexer les Thèses de master en médecine générale et de famille?
Jamoulle, Marc ULg

Conference (2016, November 22)

Les responsables des formations à la Médecine générale et de famille (MG/MF) des trois universités francophones de Wallonie et Bruxelles souhaitent prévoir la conservation et l’édition online des Travaux ... [more ▼]

Les responsables des formations à la Médecine générale et de famille (MG/MF) des trois universités francophones de Wallonie et Bruxelles souhaitent prévoir la conservation et l’édition online des Travaux de Fin d’Etude (TFE) des Internes en formation. Assembler et publier un grand nombre de travaux montera la force et l’importance du travail fourni par les Internes. La mise à disposition publique nécessite donc un système d’indexation adéquat à la pratique de la MG/MFi. Il s’agit ici de littérature dite « grise » mais dont l’importance ne doit pas être méconnueii En bibliographie usuelle, les publications sont généralement indexées par les Medical subject Heading (MeSH) de la National Library of Medicineiii. Toutefois, il n’est pas aisé de standardiser l’indexation au départ d’une liste de plus de 25.000 MeSH non prévu spécifiquement pour l’exercice de la MG/MF. Dans le cadre de sa thèse de doctorat en médecine générale et de famille (ULg, Prof. Vanmeerbeek), l’auteur a développé un tel système d’indexation. Une nouvelle classification des items non-cliniques, développées sous le nom de Q-Codes a été élaboréeiv. Elle est associée à la Classification Internationale des soins Primaires, deuxième édition (CISP-2). Ces deux outils forment ensemble un instrument de catégorisation de l’activité et des publications en MG/MF. Il est connu sous l’acronyme 3CGP, ou Core Content Classification in GP/FM.v 3CGP offre moins de 900 codes. [less ▲]

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