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See detailThérapeutiques conservatrices des tendinopathies : quoi de neuf ?
Kaux, Jean-François ULg

in 11ème Congrès d'actualités diagnostiques, éthiques et thérapeutiques de l'arrondissement de Dinant (2016, March 19)

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See detailMOOCs in business administration - An overview of assessment practice
Gherib, Camelia; Dujardin, Jean-Marie ULg; Verpoorten, Dominique ULg

in Proceedings of the Conference of the European Association for Practitioner Research on Improving Learning (EAPRIL) 2015, Issue 2 (2016, March 07)

The study explores 31 MOOCs in the field of business administration, equipped with a conceptual framework documenting 18 facets of assessment design. As a second step, the data collected on 3 MOOCs about ... [more ▼]

The study explores 31 MOOCs in the field of business administration, equipped with a conceptual framework documenting 18 facets of assessment design. As a second step, the data collected on 3 MOOCs about assessment is submitted to university members in charge of external courses accreditation procedures in order to ascertain its possible influence on their decision to credit a MOOC or not. Main results indicate that, a) the typical profile of the assessment procedure for MOOCs in business administration is: QCM-based, automatic, continuous, individual, product-centred, standardized, b) secure ways (proctoring, test-centres) to warrant learners’ identity for the tests can already be found in some MOOCs of this field, and c) concerns of course accreditors bear first and foremost on these student authentication aspects. [less ▲]

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See detailMOOCs in business administration - An overview of assessment practice
Gherib, Camelia; Dujardin, Jean-Marie ULg; Verpoorten, Dominique ULg

in Proceedings of the Conference of the European Association for Practitioner Research on Improving Learning (EAPRIL) 2015, Issue 2 (2016, March 07)

The study explores 31 MOOCs in the field of business administration, equipped with a conceptual framework documenting 18 facets of assessment design. As a second step, the data collected on 3 MOOCs about ... [more ▼]

The study explores 31 MOOCs in the field of business administration, equipped with a conceptual framework documenting 18 facets of assessment design. As a second step, the data collected on 3 MOOCs about assessment is submitted to university members in charge of external courses accreditation procedures in order to ascertain its possible influence on their decision to credit a MOOC or not. Main results indicate that, a) the typical profile of the assessment procedure for MOOCs in business administration is: QCM-based, automatic, continuous, individual, product-centred, standardized, b) secure ways (proctoring, test-centres) to warrant learners’ identity for the tests can already be found in some MOOCs of this field, and c) concerns of course accreditors bear first and foremost on these student authentication aspects. [less ▲]

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See detailCardio-pulmonary mechanics and minimal modelling in critical care
de Bournonville, Sébastien; Pironet, Antoine ULg; Desaive, Thomas ULg et al

in 14th Belgian Day on Biomedical Engineering (2016, March 04)

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See detailParameter Correlation Analysis in Four Mathematical Models of Left Ventricular Relaxation
Pironet, Antoine ULg; MORIMONT, Philippe ULg; Dauby, Pierre ULg et al

in 14th Belgian Day on Biomedical Engineering (2016, March 04)

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See detailNovel composite heterozygous mutation of the receptor for hCG and LH leading to male disorder of sexual development
Potorac, Iulia ULg; FUDVOYE, Julie ULg; GAILLEZ, Stephanie ULg et al

in Abstract book - 17th World Congress of Gynecological Endocrinology (2016, March)

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See detailDouble genetic defect in a case of congenital hypogonadotropic hypogonadism
Potorac, Iulia ULg; Pintiaux, Axelle ULg; VALDES SOCIN, Hernan Gonzalo ULg et al

in Abstract book - 17th World Congress of Gynecological Endocrinology (2016, March)

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See detailEstetrols’ Potential for Neuroprotection Following the injury to the Developing Brain: Preclinical Studies
Tskitishvili, Ekaterine ULg; Nisolle, Michelle ULg; Noël, Agnès ULg et al

in The 17th World Congress of Gynecological Endocrinology, Florence 2-5 March 2016 (2016, March)

Context: Hypoxic-Ischemic encephalopathy (HIE) remains a major cause of perinatal brain injury. The brain rapidly increases in size, shape and complexity during the second and third trimesters. A sentinel ... [more ▼]

Context: Hypoxic-Ischemic encephalopathy (HIE) remains a major cause of perinatal brain injury. The brain rapidly increases in size, shape and complexity during the second and third trimesters. A sentinel event in late pregnancy or the intrapartum period may have an acute profound effect on a previously neurologically intact fetus, leading to the development of (HIE). The nature of the deficits is dependent on the gestational age and severity of the insult, though it is seldom reported in preterm infants. Studies in animal models of HIE may provide important information for the development of treatment for this pathological condition. Estetrol (E4) is a recently described estrogen with four hydroxyl-groups that is synthesized exclusively during pregnancy by the human fetal liver. Objective: In this study, we evaluated E4’s neuroprotective and therapeutic potency in neonatal (in vivo) HIE model of the immature 7-day-old newborn rat. Methods: Rat pups body temperatures were examined along with their body and brain weights. Brains were studied at the level of the hippocampus and cortex. Intact cell counting and expressions of markers for neuronal early grey matter damage (microtubule-associated protein-2 (MAP-2)), neurogenesis (doublecortin (DCX)) and angiogenesis (vascular-endothelial growth factor (VEGF)) were evaluated by histo- and immunohistochemistry. The serum levels of two markers of brain damage (S100B and glial fibrillary acidic protein (GFAP)) were measured by ELISA. Results: Our results demonstrate that E4 has a significant neuroprotective and therapeutic effects. Estetrol decreases the early gray matter loss, and promotes neuro- and angiogenesis in vivo. Estetrol treatment has no effects on body weight, brain weight or body temperature. Conclusion: Taken together, E4 might become an important safe and physiological substance to treat neonatal HIE. [less ▲]

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See detailEDUCATION RACHIDIENNE : DE L’ENFANT AU SPORTIF DE HAUT NIVEAU
Vanderthommen, Marc ULg; GROSDENT, Stéphanie ULg; Fettweis, Tatiana ULg et al

in Livre des Résumés du 2ème Colloque Guy Namurois (2016, February 27)

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See detailSPÉCIALISATION SPORTIVE PRÉCOCE : QUEL IMPACT SUR LA PERFORMANCE, SUR LE DÉVELOPPEMENT ET SUR LA SANTÉ ET QUELLES PISTES DE SOLUTION ?
Jidovtseff, Boris ULg

in Jidovtseff; Halleux, Philippe; Lambert, Eric (Eds.) Livre des résumés du 2ème colloque Guuy Namurois (de l'éducation physique à la performance sportive) (2016, February 27)

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See detail10.2. Evaluation des cultures dérobées implantées en tant que surfaces d'intérêt écologique (SIE) dans le cadre de la PAC 2015-2020
Hancart, F.; Jenet, D.; Lambert, B. et al

in Watillon, B.; Bodson, Bernard (Eds.) Livre Blanc Céréales (2016, February 24)

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See detail5. Régulateurs de croissance
Henriet, François; Monfort, Bruno; Meza Morales, Walter ULg

in Watillon, Bernard; Bodson, Bernard (Eds.) Livre Blanc Céréales (2016, February 24)

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See detail4. La fumure azotée
Meza Morales, Walter ULg; Monfort, Bruno; Dumont, Benjamin ULg et al

in Watillon, Bernard; Bodson, Bernard (Eds.) Livre Blanc Céréales (2016, February 24)

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See detail6. Lutte intégrée contre les maladies
Bataille, Charlotte; Duvivier, Maxime; Heens, Benoît et al

in Watillon, Bernard; Bodson, Bernard (Eds.) Livre Blanc Céréales (2016, February 24)

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See detail10.1. L'intérêt de la culture en association de froment et de pois protéagineux d'hiver dans un objectif d'autonomie protéique
Pierreux, Jérome ULg; Delaplace, Pierre ULg; Roisin, Christian et al

in Watillon, Bernard; Bodson, Bernard (Eds.) Livre Blanc Céréales (2016, February 24)

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See detail2. Implantation des cultures
Eylenbosch, Damien ULg; Meza Morales, Walter ULg; Monfort, Bruno et al

in Watillon, Bernard; Bodson, Bernard (Eds.) Livre Blanc Céréales (2016, February 24)

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See detailPrise en charge des patients en état de conscience altérée. Approche kinésithérapique par stimulations transcrâniennes non invasives et attèles souples
Martens, Géraldine ULg

in Kinésithérapie, la revue. Vol 16 - n°170 (2016, February)

Ces dernières années, grâce au perfectionnement des techniques de réanimation, le nombre de patients survivant à leur lésion cérébrale a fortement augmenté. Tandis que certains se rétablissent rapidement ... [more ▼]

Ces dernières années, grâce au perfectionnement des techniques de réanimation, le nombre de patients survivant à leur lésion cérébrale a fortement augmenté. Tandis que certains se rétablissent rapidement, d’autres traversent différents états de conscience altérée (coma, état végétatif/non répondant ou état de conscience minimale) avant de récupérer ou non un état de conscience normal. Les patients en état de conscience altérée représentent un problème majeur tant au niveau diagnostique, pronostique, thérapeutique, qu’au niveau de leur prise en charge quotidienne. Diverses possibilités de traitements pharmacologiques et non pharmacologiques ont été étudiées. Les techniques des stimulations transcrâniennes à courant continu (tDCS) augmentent l’excitabilité corticale et le flux sanguin cérébral régional. La plasticité cérébrale s’en voit améliorée, ce qui module l’activité corticale et donc l’activité fonctionnelle des aires se trouvant sous l’anode. Une plasticité cérébrale est parfois encore possible, même au stade chronique. Un des problèmes majeurs de ces patients est la spasticité qui cause diverses complications (rétractions musculaires, subluxations et luxations articulaires, escarres, positions vicieuses) en plus du facteur algique. Ces complications sont d’autant plus importantes que ces patients sont voués à rester alités. La kinésithérapie permet de réduire les complications liées à la spasticité mais est parfois insuffisante et la prise d’antispastiques est inévitable. La technique la plus couramment utilisée est l’étirement passif : son efficacité dans la réduction des phénomènes spastiques est clairement reconnue. Par ailleurs, des études ont montré l’intérêt de la mise en place d’une attèle souple au niveau du membre supérieur chez les patients spastiques. L’avantage de cette technique est sa simplicité d’utilisation. Cette attelle se base sur le principe de saturation du système proprioceptif cutané à l’aide d’un tissu élastique, ceci simultanément à un rééquilibrage des antagonistes. De nombreuses pistes restent encore à explorer pour une prise en charge optimale des patients cérébrolésés. [less ▲]

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See detailCommuniquer pour mieux gérer les ressources naturelles, cas pilote du bassin versant de la rivière Lukaya.
Jacmain, Céline; Rosillon, Francis ULg

in Elongo, V.L.; Wildi, Walter; Onaotsho, K. (Eds.) et al Actes du séminaire interdisciplinaire et interuniversitaire : Communication environnementale dans les pays en développement : enjeux, modèles, applications. (2016, February)

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See detailCharacterization of GPR101 transcripts structure, expression and signaling
Trivellin, G; Bjelobaba, I; Daly, Adrian ULg et al

in Abstract book - Keystone Symposia on GPCRs (2016, February)

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See detailPredicting Review Helpfulness
Ittoo, Ashwin ULg

in Proceedings (2016, February)

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See detailContextualisation de la pensée d'Albert Demaret et réflexion autour du déni anorexique
Mormont, Christian ULg

in Englebert, Jérôme; Follet, Valérie (Eds.) Adaptation. Essai collectif à partir des paradigmes éthologiques et évolutionnistes. (2016, February)

Contextualization of thoughts and works of Albert Demaret in the field of psychiatry and ethology. About the disavowal in anorectic female.

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See detailDecision Making from Confidence Measurement on the Reward Growth using Supervised Learning: A Study Intended for Large-Scale Video Games
Taralla, David ULg; Qiu, Zixiao ULg; Sutera, Antonio ULg et al

in Proceedings of the 8th International Conference on Agents and Artificial Intelligence (ICAART 2016) - Volume 2 (2016, February)

Video games have become more and more complex over the past decades. Today, players wander in visually and option- rich environments, and each choice they make, at any given time, can have a combinatorial ... [more ▼]

Video games have become more and more complex over the past decades. Today, players wander in visually and option- rich environments, and each choice they make, at any given time, can have a combinatorial number of consequences. However, modern artificial intelligence is still usually hard-coded, and as the game environments become increasingly complex, this hard-coding becomes exponentially difficult. Recent research works started to let video game autonomous agents learn instead of being taught, which makes them more intelligent. This contribution falls under this very perspective, as it aims to develop a framework for the generic design of autonomous agents for large-scale video games. We consider a class of games for which expert knowledge is available to define a state quality function that gives how close an agent is from its objective. The decision making policy is based on a confidence measurement on the growth of the state quality function, computed by a supervised learning classification model. Additionally, no stratagems aiming to reduce the action space are used. As a proof of concept, we tested this simple approach on the collectible card game Hearthstone and obtained encouraging results. [less ▲]

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See detailFramework for Threat Based Failure Rates in Transmission System Operation
Perkin, Samuel; Bjornsson, Gudjon; Baldursdottir, Iris et al

in Framework for Threat Based Failure Rates in Transmission System Operation (2016, February)

Reliability of electrical transmission systems isvpresently managed by applying the deterministic N-1 criterion, or some variant thereof. This means that transmission systems are designed with at least ... [more ▼]

Reliability of electrical transmission systems isvpresently managed by applying the deterministic N-1 criterion, or some variant thereof. This means that transmission systems are designed with at least one level of redundancy, regardless of the cost of doing so, or the severity of the risks they mitigate. In an operational context, the N-1 criterion provides a reliability target but it fails to accurately capture the dynamic nature of short-term threats to transmission systems. Ongoing research aims to overcome this shortcoming by proposing new probabilistic reliability criteria. Such new criteria are anticipated to rely heavily on component failure rate calculations. This paper provides a threat modelling framework, using the Icelandic transmission system as an example, highlighting the need for improved data collection and failure rate modelling. The feasibility of using threat credibility indicators to achieve spatio-temporal failure rates, given minimal data, is explored in a case study of the Icelandic transmission system. The paper closes with a discussion on the assumptions and simplifications that are implicitly made in the formulation, and the additional work required for such an approach to be included in existing practices. Specifically, this paper is concerned only with short term and real-time management of electrical transmission systems. [less ▲]

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See detailHow heterogeneity of the K-field influences a heat plume in a shallow alluvial aquifer: responses from a heat tracer test
Klepikova, Maria; Jamin, Pierre ULg; Orban, Philippe ULg et al

in Abstract book (2016, January 26)

Simultaneous solute and heat tracer test provides essential information for a reliable assessment of low temperature geothermal systems. The actual efficiency of ‘open systems’, including heat storage ... [more ▼]

Simultaneous solute and heat tracer test provides essential information for a reliable assessment of low temperature geothermal systems. The actual efficiency of ‘open systems’, including heat storage projects, is strongly affected by the heterogeneity of the hydraulic conductivity field (K-field). It could be also useful for assessing the cumulative impacts of numerous projects in urban areas on the groundwater resources. Using field data from a solute and heat tracer test conducted in the alluvial aquifer of the Meuse River (Belgium), an inverse problem of parameter estimation is solved. The tracing experiment consisted in simultaneously injecting heated water and a dye tracer in a piezometer and monitoring the evolution of groundwater temperature and tracer concentration in the recovery well and in monitoring wells. To get insights in the 3D characteristics of the heat plume, an arrangement of three transects of observation wells was used. The breakthrough curves measured in the recovery well showed that heat transfer in the alluvial aquifer is slower and more dispersive than solute transport. Recovery is very low for heat while in the same time it is measured as relatively high for the solute tracer. This is due to the fact that heat transport is a thermal diffusion dominated process. For conditions corresponding to high Peclet numbers, the hydraulic conductivity is the primary calibration parameter for predicting heat plume distribution. Heat diffusion is larger than molecular diffusion, implying that exchange between groundwater and the porous medium matrix is far more significant for heat than for solute tracers. [less ▲]

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See detailHydrogeological conditions required for Underground Pumping Storage Hydroelectricity (UPSH) in old mines
Bodeux, Sarah ULg; Pujades, Estanislao ULg; Orban, Philippe ULg et al

in Abstract book (2016, January 26)

Renewable energy sources, because of their intermittence, could not afford a stable production and an adequate variability according to the energy demand. Underground Pumped Storage Hydroelectricity (UPSH ... [more ▼]

Renewable energy sources, because of their intermittence, could not afford a stable production and an adequate variability according to the energy demand. Underground Pumped Storage Hydroelectricity (UPSH) using abandoned mine works is an interesting alternative, in flat regions, to store energy during low demand periods by pumping water from an underground mine to an upper reservoir. From the hydrogeological point of view, two considerations can arise for studying the feasibility before constructing an UPSH plant: 1) the alteration of the natural conditions of surrounding aquifers, and (2) the efficiency of the plant depending on possible leakage in the cavities from the hydrogeological environment. A potential old slate mine was selected through a multi-criterion method and its geometrical and hydrogeological characteristics are used to build a simple but typical model. With the help of the HFEMC approach implemented in the code SUFT3D (HEG-ULg), the groundwater flows are modelled for a representative cavity. Simulations of groundwater flow induced by a UPSH system are performed and the main variables are identified. Piezometric heads around the reservoir oscillate, the magnitude of the oscillations and the time to achieve a pseudo-steady state (magnitude and head reached during oscillations not varying anymore with time) depend on the boundaries, the parameters of the aquifer and the characteristics of the underground reservoir. The required hydrogeological conditions are deduced and a screening methodology can be proposed to assess the main impacts caused in aquifers by UPSH plants. Their efficiency regarding the water level evolution inside the reservoir is also considered accommodating the cyclic pumped storage schemes. [less ▲]

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See detailTennis elbow - Actualités
Kaux, Jean-François ULg

in La Médecine et le Sport : mise au point (2016, January 23)

L’épicondylite latérale est plus communément appelée tennis elbow suite à sa fréquence élevée d’apparition chez les joueurs de tennis – lors du mouvement de revers, principalement. Cette pathologie du ... [more ▼]

L’épicondylite latérale est plus communément appelée tennis elbow suite à sa fréquence élevée d’apparition chez les joueurs de tennis – lors du mouvement de revers, principalement. Cette pathologie du membre supérieur, fréquente chez les sportifs, touche particulièrement la région épicondylienne radiale, zone d’insertion commune des muscles extenseurs. L’épicondylite latérale est 7 à 20 fois plus répandue que l’épicondylite médiale souvent nommée golfer’s elbow. L’âge est un facteur de risque important, la prévalence est la plus élevée chez les individus âgés entre 35 et 55 ans. Un autre élément prédisposant est la répétition d’un mouvement pendant plus de 2 à 4 heures par jour. Certains sports ont une plus grande incidence sur l’épicondylite que d’autres. Le tennis, le windsurf, l’escalade, le lancer du javelot ou les sports en chaises roulantes sont des activités à haut risque concernant les tendinopathies du coude. Le milieu professionnel joue aussi son rôle délétère envers les muscles épicondyliens. Le travail à la chaine sur des machines, obligeant des mouvements de flexion-extension répétés du coude, de la main et des doigts, peut rapidement être responsable d’épicondylites. De même, la position de travail, le matériel inadapté, le port d’outils trop lourds, le cumul de gestes à risque et, globalement, la mauvaise ergonomie du poste de travail constituent des facteurs déclenchant des tendinopathies du coude. Les épicondylites peuvent être aussi provoquées par des gestes quotidiens : le ménage, le bricolage, la traction de « caddy » au supermarché, l’excès d’activité sur ordinateur par exemple. Malgré une importante diversité des traitements conservateurs – repos, glace, orthèse, anti-inflammatoire non-stéroïdien en phase aigüe, ultrasons, stimulation électrique, massage transverse profond, étirement et onde de chocs –, les symptômes persistent ou des rechutes après un retour à l’activité incriminée sont souvent observées. De nouvelles thérapeutiques, par injection de plasma riche en plaquettes ou acide hyaluronique par exemple, sont également développées pour traiter les tendinopathies rebelles. Au final, si le traitement conservateur n’est plus efficace, la chirurgie sera envisagée. [less ▲]

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See detailDoes Fomalhaut A Have an Asteroid-belt Analog?
Su, Kate Y. L.; Rieke, George; Defrere, Denis ULg et al

in American Astronomical Society Meeting Abstracts (2016, January 01)

Fomalhaut plays an important role in the study of debris disks and small bodies in other planetary systems. The proximity and luminosity of the star make key features of its debris like the water ice-line ... [more ▼]

Fomalhaut plays an important role in the study of debris disks and small bodies in other planetary systems. The proximity and luminosity of the star make key features of its debris like the water ice-line easily accessible. Here we present ALMA cycle 1, 870 μm (345 GHz) observation targeted at the inner part of the Fomalhaut system with a synthesized beam of 0.45"x0.37" (~3 AU linear resolution at the distance of Fomalhaut) and a rms of 26 μJy per beam. The high angular resolution and sensitivity of the ALMA data enable us to place strong constraints on the nature of the warm excess revealed by Spitzer and Herschel observations. We detect a point source at the star position with a total flux consistent with thermal emission from the stellar photosphere. No structures that are brighter than 3 σ are detected in the central 15 AUx15 AU region. Modeling the spectral energy distribution using parameters expected for a dust-producing planetesimal belt indicates a radial location in the range ˜8-15 AU. This is consistent with the location where ice sublimates in Fomalhaut, i.e., an asteroid-belt analog. We also provide a new interpretation for the emission structure in the inner 10 AU region revealed by interferometric measurements at 2 and 8-13 μm as dust naturally connected to this proposed asteroid belt by Poynting-Robertson drag, dust sublimation, and magnetically trapped nano grains. [less ▲]

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See detailAn Accreting Protoplanet: Confirmation and Characterization of LkCa15b
Follette, Katherine B.; Miller Close, Laird; Males, Jared et al

in American Astronomical Society Meeting Abstracts (2016, January 01)

We present a visible light adaptive optics direct imaging detection of a faint point source separated by just 93 milliarcseconds (~15 AU) from the young star LkCa 15. Using Magellan AO's visible light ... [more ▼]

We present a visible light adaptive optics direct imaging detection of a faint point source separated by just 93 milliarcseconds (~15 AU) from the young star LkCa 15. Using Magellan AO's visible light camera in Simultaneous Differential Imaging (SDI) mode, we imaged the star at Hydrogen alpha and in the neighboring continuum as part of the Giant Accreting Protoplanet Survey (GAPplanetS) in November 2015. The continuum images provide a sensitive and simultaneous probe of PSF residuals and instrumental artifacts, allowing us to isolate H-alpha accretion luminosity from the LkCa 15b protoplanet, which lies well inside of the LkCa15 transition disk gap. This detection, combined with a nearly simultaneous near-infrared detection with the Large Binocular Telescope, provides an unprecedented glimpse at a planetary system during epoch of planet formation. [less ▲]

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See detailUne forme compliquée d'hypercalcémie hypocalciurique familiale
Potorac, Iulia ULg; BETEA, Daniela ULg; MALAISE, Olivier ULg et al

in Abstract book - Symposium "Perspectives in Endocrinology" (2016, January)

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See detailExperimental study of isolated response curves in a two-degree-of-freedom nonlinear system
Detroux, Thibaut ULg; Noël, Jean-Philippe ULg; Kerschen, Gaëtan ULg et al

in Proceedings of the International Modal Analysis Conference (IMAC) XXXIV (2016, January)

In the present paper, the observation and characterization of isolated response curves (IRCs) are experimentally reported in the case of a nonlinear system consisting of two masses sliding on an ... [more ▼]

In the present paper, the observation and characterization of isolated response curves (IRCs) are experimentally reported in the case of a nonlinear system consisting of two masses sliding on an horizontal guide. Transverse springs are attached to one mass to provide the nonlinear restoring force, and a harmonic motion of the complete system is imposed by prescribing the displacement of their supports. The existence of an IRC is related to a 3:1 internal resonance between the two modes of the system. The observed IRC is studied in detached and merged conditions using swept-sine excitations and system perturbations. [less ▲]

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See detailA Comparison of Reduced Order Modeling Techniques Used in Dynamic Substructuring
Roettgen, Daniel; Seeger, Benjamin; Tai, Wei Che et al

in Proceedings of the International Modal Analysis Conference (IMAC) XXXIV (2016, January)

Experimental dynamic substructuring is a means whereby a mathematical model for a substructure can be obtained experimentally and then coupled to a model for the rest of the assembly to predict the ... [more ▼]

Experimental dynamic substructuring is a means whereby a mathematical model for a substructure can be obtained experimentally and then coupled to a model for the rest of the assembly to predict the response. Recently, various methods have been proposed that use a transmission simulator to overcome sensitivity to measurement errors and to exercise the interface between the substructures; including the Craig-Bampton, Dual Craig-Bampton, and Craig-Mayes methods. This work compares the advantages and disadvantages of these reduced order modeling strategies for two dynamic substructuring problems. The methods are first used on an analytical beam model to validate the methodologies. Then they are used to obtain an experimental model for structure consisting of a cylinder with several components inside connected to the outside case by foam with uncertain properties. This represents an exceedingly difficult structure to model and so experimental substructuring could be an attractive way to obtain a model of the system. [less ▲]

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See detailHysteresis identification using nonlinear state-space models
Noël, Jean-Philippe ULg; Esfahani, Alireza; Kerschen, Gaëtan ULg et al

in Proceedings of the International Modal Analysis Conference (IMAC) XXXIV (2016, January)

Most studies tackling hysteresis identification in the technical literature follow white-box approaches, i.e. they rely on the assumption that measured data obey a specific hysteretic model. Such an ... [more ▼]

Most studies tackling hysteresis identification in the technical literature follow white-box approaches, i.e. they rely on the assumption that measured data obey a specific hysteretic model. Such an assumption may be a hard requirement to handle in real applications, since hysteresis is a highly individualistic nonlinear behaviour. The present paper adopts a black-box approach based on nonlinear state-space models to identify hysteresis dynamics. This approach is shown to provide a general framework to hysteresis identification, featuring flexibility and parsimony of representation. Nonlinear model terms are constructed as a multivariate polynomial in the state variables, and parameter estimation is performed by minimising weighted least-squares cost functions. Technical issues, including the selection of the model order and the polynomial degree, are discussed, and model validation is achieved in both broadband and sine conditions. The study is carried out numerically by exploiting synthetic data generated via the Bouc-Wen equations. [less ▲]

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See detailRobust Subspace Identification of a Nonlinear Satellite Using Model Reduction
Dossogne, Tilàn ULg; Noël, Jean-Philippe ULg; Kerschen, Gaëtan ULg

in Proceedings of the International Modal Analysis Conference (IMAC) XXXIV (2016, January)

The frequency-domain nonlinear subspace identification (FNSI) method has recently been successfully applied to large-scale nonlinear structures. One of the key features of FNSI is the nonlinear ... [more ▼]

The frequency-domain nonlinear subspace identification (FNSI) method has recently been successfully applied to large-scale nonlinear structures. One of the key features of FNSI is the nonlinear generalisation of the stabilisation diagram. However, as in linear system identification, the selection of the model order in the diagram is complicated by the presence of spurious poles, resulting from noise and modelling errors. Spurious poles have been shown to strongly perturb the estimation of the nonlinear coefficients. The present paper establishes a constructive procedure to discriminate between spurious and genuine poles. This procedure is derived in modal space and is based on a dominancy index and on model reduction techniques. It is demonstrated on a complete satellite structure possessing nonsmooth nonlinearities and high modal density. Spurious frequency variations in the nonlinear coefficients are proved to be effectively removed, significantly improving the quality of the overall identified model. [less ▲]

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See detailObtaining nonlinear frequency responses from broadband testing
Gourc, Etienne ULg; Grappasonni, Chiara ULg; Noël, Jean-Philippe ULg et al

in Proceedings of the International Modal Analysis Conference (IMAC) XXXIV (2016, January)

The objective of the paper is to obtain the frequency response curves of nonlinear mechanical systems from broadband testing. The proposed approach consists in coupling an identification method with a ... [more ▼]

The objective of the paper is to obtain the frequency response curves of nonlinear mechanical systems from broadband testing. The proposed approach consists in coupling an identification method with a continuation method. Specifically, the frequency-domain nonlinear subspace identification (FNSI) method is first used to derive an experimental model of the structure in state space from broadband measurements. The harmonic balance method coupled with arclength continuation then utilizes this experimental model to compute the frequency response curves of the system. The method is demonstrated using a numerical example. [less ▲]

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See detailThe genetic causes of pituitary gigantism
Rostomyan, Liliya ULg; Lysy, P; Desfilles, C et al

in Abstract book - Symposium "Perspectives in Endocrinology" (2016, January)

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See detailLe cabinet de papier de Jean Jacques Boissard (1528-1602). Réception de l’Antiquité et collectionnisme
De Marco, Rosa ULg

in Bourdieu, Catherine (Ed.) Collections et collectionneurs dans les Trois-Évêchés (2016, January)

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See detailErosion and sedimentation in a hydropower project: assessing impacts and opportunities
Dewals, Benjamin ULg; Erpicum, Sébastien ULg; Archambeau, Pierre ULg et al

in Schüttrumpf, Holger (Ed.) Offene Gewässer: Strahlwirkung, Fischaufstieg, Fischabstieg, Sedimente, Schadstoffe (2016)

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See detailDes chevaliers irréfléchis ? Panique et témérité dans les traités d’art militaire (c. 1330-c. 1530)
Masson, Christophe ULg

in Trévisi, Marion; Vissière, Laurent (Eds.) Le feu et la folie. L’irrationnel et la guerre (fin du Moyen Âge-1920) (2016)

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See detailImproving properties of recycled concrete aggregates by accelerated carbonation
Zhao, Zengfeng ULg; Remond, Sébastien; Damidot, Denis et al

in Proceedings of the 4th International Conference on Sustainability Construction Materials and Technologies (2016)

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See detailNew geochronological history of the Mbuji-Mayi Supergroup (Proterozoic, DRC) through U-Pb and Sm-Nd dating
François, Camille ULg; Kabamba Baludikay, Blaise ULg; Storme, Jean-Yves et al

in European Geosciences Union General Assembly 2016 Vienna, Austria, 2016 (2016)

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See detailFaire de la musique : rythmes et rapports chez Mallarmé
Durand, Pascal ULg

in Bonnet, Antoine; Frangne, Pierre-Henry (Eds.) Mallarmé et la Musique, la Musique et Mallarmé (2016)

Inséparable du processus d'autonomisation du discours poétique et de la radicalisation que ce processus connaît chez lui, sur fond de propagande wagnérienne et de propagation du vers libre, le modèle ... [more ▼]

Inséparable du processus d'autonomisation du discours poétique et de la radicalisation que ce processus connaît chez lui, sur fond de propagande wagnérienne et de propagation du vers libre, le modèle musical prend, dans l'esthétique de Mallarmé, l'aspect d'un système de rapports généralisés à tous les paramètres de l'écrit. L'inhérence réciproque que le poète établit entre la "Musique" et les "Lettres", représentation imaginaire dont Un Coup de dés constitue la contrepartie réalisée, répond d'un côté à un matérialisme de la forme et de l'autre à un idéalisme fictif, voulant que les structures verbales et prosodiques s'offrent en miroir du système de rapports avec quoi se confond, en sa finitude sans extériorité, l’univers même. [less ▲]

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See detailLes frontières du droit à l'épreuve des films de mafias
Thirion, Nicolas ULg; Pasteger, David ULg

in Flores-Lonjou, Magalie (Ed.) Frontière(s) au cinéma - Actes des septièmes rencontres "Droit et cinéma" (2016)

demander dans quelle mesure l’injonction du brigand qui exige « la bourse ou la vie ! » peut être comparée à la norme de comportement édictée par un Etat sous la forme d’une loi, c’est poser la ... [more ▼]

demander dans quelle mesure l’injonction du brigand qui exige « la bourse ou la vie ! » peut être comparée à la norme de comportement édictée par un Etat sous la forme d’une loi, c’est poser la sempiternelle question de la frontière qui sépare le droit du non-droit, tout au moins dans une perspective juspositiviste, en tant que cette école de théorie du droit refuse de définir le phénomène juridique en se référant à une valeur ou un ensemble de valeurs. La frontière du droit et du non-droit est en effet particulièrement difficile à tracer, nonobstant plusieurs siècles de discussions philosophiques à ce sujet. Lorsque, fatigué de parcourir les chemins, le brigand décide de s’installer en ville pour s’y adonner au racket des commerçants du quartier et qu’il s’adjoint ensuite le concours d’autres bandits, c’est un gang de malfaiteurs qui voit le jour. Si, ultérieurement, ce gang se concerte avec d’autres bandes de truands pour s’épauler mutuellement dans les exactions auxquelles ils se livrent sur leurs territoires respectifs, il prend alors la forme d’une organisation criminelle ou, au sens large du terme, d’une « mafia ». Le cinéma de Francis Ford Coppola, Martin Scorsese, Brian De Palma, Sergio Leone ou bien encore Matteo Garrone, entre autres, dépeint, souvent avec réalisme, la genèse et le fonctionnement de telles organisations criminelles. La communication a proposé, au moyen d’illustrations tirées des films de ces grands cinéastes, une analyse de microscopie juridique du crime organisé. Une description serrée de la particule élémentaire du phénomène juridique, identifiée par Lucien François dans son ouvrage de théorie du droit Le cap des Tempêtes sous l’appellation de « jurème », met en lumière une indéniable proximité entre les techniques de pouvoir utilisées respectivement par le brigand isolé, la bande organisée et l’Etat souverain. En remontant ensuite vers la structure plus complexe d’un système étatique, on se demandera si, en fin de compte, dans la vision juspositiviste poussée au bout de sa logique par Lucien François, l’Etat ne pourrait être réduit, d’un point de vue ontologique, à un pouvoir de fait comparable, par les techniques de contrainte qu’il exerce sur ses sujets, à une organisation criminelle – abstraction faite des valeurs promues ou poursuivies par tel ou tel appareil étatique. [less ▲]

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See detailConservation of contemporary art: from concepts to practice, Cloaca by Wim Delvoye
Verbeeck, Muriel ULg; Broers, Nico

in Hermens, Erma; Robertson, Frances (Eds.) Authenticity in transition (2016)

This paper looks at the ambiguities of language and concepts when considering the restoration of contemporary art.

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See detailBode, Nicolai und Elisa von der Recke: Korrespondenzen und Netzwerke
Leyh, Valérie ULg

in Kinzel, Till; Berghahn, Cord-Friedrich (Eds.) Johann Joachim Christoph Bode (1731-1793) - ein Aufklärer aus Braunschweig in den kulturellen Netzwerken seiner Zeit (2016)

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See detailThermal maturity of carbonaceous material from Mbuji-Mayi Supergroup (Kasai, Democratic Republic of Congo)
Kabamba Baludikay, Blaise ULg; Storme, Jean-Yves; Baudet, Daniel et al

in European Geosciences Union General Assembly 2016 Vienna, Austria, 2016 (2016)

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See detailTowards a New Design Equation for Piano Key Weirs Discharge Capacity
Bashiri Atrabi, Hamid ULg; Dewals, Benjamin ULg; Pirotton, Michel ULg et al

in Proc. of the 6th International Symposium on Hydraulic Structures (2016)

Piano Key weirs are Labyrinth like weirs which can be placed on the top of gravity dams. They represent a powerful solution to increase the discharge capacity of existing dam spillways. For proper design ... [more ▼]

Piano Key weirs are Labyrinth like weirs which can be placed on the top of gravity dams. They represent a powerful solution to increase the discharge capacity of existing dam spillways. For proper design it is necessary to accurately predict this discharge capacity. In this research, artificial neural network, multiple linear and nonlinear regressions are used to set up a new design equation for the discharge capacity of Piano Key weirs. The effect of each parameter on the discharge capacity of Piano Key weirs is tested in these models. Several non-dimensional parameters are used to define a functional relationship between the inputs and output. These parameters are built from the geometric dimensions of the structure such as weir height, inlet and outlet keys width, overhangs length, water head and side crest length. Previous experimental data, which were collected at the experimental laboratory of the research group Hydraulics in Environmental and Civil Engineering (HECE), University of Liege, are used for training and testing patterns of the models. Root mean square errors (RMSE) and coefficient of determination (R2) are used as comparing criteria for the evaluation of the models. The models’ results are compared with experimental results and other existing equations. [less ▲]

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See detailIndoor Joinery and Furniture Made for Eighteenth-Century Houses in Liège (Belgium)
Gilles, Isabelle ULg

in Sosnowska, Philippe; Charruadas, Paulo; Fraiture, Pascale (Eds.) et al From Carpentry to joinery : floors and ceilings, shutters and frames, doors and panelling in medieval and modern architecture (2016)

Though few eighteenth-century houses in Liège have conserved their original wooden furniture or fittings, archival research reveals that these elements constituted a key aspect of the domestic interior ... [more ▼]

Though few eighteenth-century houses in Liège have conserved their original wooden furniture or fittings, archival research reveals that these elements constituted a key aspect of the domestic interior. The present work draws largely on a series of public announcements known as Rendages proclamatoires which concerned property belonging to orphans sold by public auction, that exist. From 1697 to 1765, these sources provided descriptions of 257 houses situated within the city walls. The wooden furniture and fittings of eighteenth-century Liegerian houses can clearly be seen to be pertain to far more than the sole history of joinery: they also tell the story of Liege’s domestic living spaces in terms of social structure and cultural change. As such they eloquently illustrate the fact that it is only by taking into account the Old Regime’s conception of architecture as a total entity that we can today work towards establishing an increasingly just, coherent and complete understanding of ancient edifices. [less ▲]

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See detailHandling Intra-Household Correlations in Modeling Travel: A Comparison of Hierarchical (Random Effect) Models and Marginal (GEE) Models
Cools, Mario ULg; Moons, Elke

in Proceedings of the 95th Annual Meeting of the Transportation Research Board (2016)

In this paper, the necessity for treating intra-household correlation is investigated by analyzing two travel behavior indices, i.e. travel time and travel distance, for three important travel motives ... [more ▼]

In this paper, the necessity for treating intra-household correlation is investigated by analyzing two travel behavior indices, i.e. travel time and travel distance, for three important travel motives (commuting, shopping, and leisure). Data stemming from the 2010 Belgian National Household Travel Survey are used in the analysis. Two model approaches that accommodate for intra-household correlation are compared, namely the generalized linear mixed model (GLMM) and GEE model approach. Both model approaches show that high levels of intra-household correlation are present, and therefore the use of models that take into account intra-household correlation, is strongly recommend. Results indicate that this requirement is the most urgent for non-commuting trips. Moreover, the results show that GLMM and GEE yield comparable estimates in the case of normally distributed data. Furthermore, evidence was provided that the more the estimates of the intra-household correlation provided by the two approaches differ, the less the homogeneity of the parameters is assured. In this regard, if one has to choose between the GLMM and GEE methodology, especially the negative consequences of choosing an inappropriate covariance model in the case of a GLMM model favor the selection of the GEE methodology. Further research is needed to compare the two approaches in the context of non-normally distributed travel behavior data. [less ▲]

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See detailAn integrated framework for forecasting travel behavior using Markov Chain Monte-Carlo simulation and profile Hidden Markov Models
Saadi, Ismaïl ULg; El Saeid Mustafa, Ahmed Mohamed ULg; Teller, Jacques ULg et al

in Proceedings of the 95th Annual Meeting of the Transportation Research Board (2016)

Recent advances in agent-based micro-simulation modelling have further underlined the importance of a thorough full synthetic population procedure to guarantee a correct characterization of the true ... [more ▼]

Recent advances in agent-based micro-simulation modelling have further underlined the importance of a thorough full synthetic population procedure to guarantee a correct characterization of the true population. We propose an integrated approach including Markov Chain Monte Carlo (MCMC) simulation and profiling based methods to catch the complexity and the diversity of agents of the true population through representative micro samples. The population synthesis method is capable of building the joint distribution of a given population with its corresponding marginal distributions (e.g. age, gender, socio-professional status etc.) using complete, partial conditional probabilities or both of them at the same time. Particularly, the estimation of socio-demographic variables and characterization of daily activity-travel patterns are included within the framework. Data stemming from the 2010 Belgian Household Daily Travel Survey (BELDAM) are used to calibrate the modelling framework. We illustrate that this framework catches in an efficient way the behavioral heterogeneity of travelers. Furthermore, we show that the proposed framework is adequately adapted to build large scale micro-simulation scenarios of transportation and urban systems. [less ▲]

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See detail« “Semen est sanguis christianorum” (Apol. 50, 13). Tertullien et l'hagiographie africaine »
Fialon, Sabine ULg

in Lagouanère, Jérôme; Fialon, Sabine (Eds.) Tertullianus Afer. Tertullien et la littérature chrétienne d'Afrique, IIe-VIe siècle (2016)

Despite his long expositions and treatises dealing with martyrial heroism, Tertullian does not seem to have influenced the North African hagiographical production (iind-vith centuries), while Cyprian did ... [more ▼]

Despite his long expositions and treatises dealing with martyrial heroism, Tertullian does not seem to have influenced the North African hagiographical production (iind-vith centuries), while Cyprian did it deeply. This article aims to show that the influence of the african rhetor was yet genuine. If it is difficult to detect in the Passio sanctarum Perpetuae et Felicitatis, we can find it in donatist hagiography and above all in hagiographic texts from Mauretania Caesariensis. By studying themes and literary echoes coming from Tertullian’s work, this contribution wants to help with a better comprehension of the legacy left by the rhetor in a literary genre which is not much examine from this point of view. It also wants to highlight the cultural vitality of Mauretania Caesariensis during late Antiquity. [less ▲]

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See detailDiscours et stratégies dans les déclarations criminelles élaborées devant les notaires liégeois aux XVIIe et XVIIIe siècles
Drécourt, Aurore ULg

in Dire, (d)écrire, représenter la violence, Colloque international du CRIHAM (2016)

Le présent projet de communication propose une étude sur la manière de représenter la violence ainsi que son instrumentalisation à des fins personnelles dans des actes relevant de la pratique notariale ... [more ▼]

Le présent projet de communication propose une étude sur la manière de représenter la violence ainsi que son instrumentalisation à des fins personnelles dans des actes relevant de la pratique notariale aux XVIIe et XVIIIe siècles à Liège. L’analyse de ces sources est novatrice pour une histoire de la criminalité. En effet, les historiens se sont avant tout centrés sur les archives des cours judiciaires. Il semble cependant que les populations d’Ancien Régime n’allaient pas systématiquement devant le juge pour régler leurs conflits. Ainsi des accords, qui ne seraient sans doute jamais parvenus à la connaissance de l’historien par la seule étude des archives criminelles, émergent dans les actes relevant de la pratique notariale. Outre ces accommodements clairement identifiés dans les minutes, les populations d’Ancien Régime se déplacent également devant notaires pour que ceux-ci retranscrivent, plus ou moins fidèlement, le récit subjectif d’un évènement vécu. Ces déclarations criminelles seront ensuite, selon le choix du comparant, enregistrées ou non au greffe. En effet, cette trace d’accusation ou de témoignage ne parvient pas systématiquement aux autorités. Tout dépend de l’évolution du conflit et parfois le simple déplacement chez le notaire pousse la partie adverse à s’accommoder avant le passage en justice. Ces déclarations criminelles constituent des sources particulièrement intéressantes pour observer la psychologie, les perceptions et les interprétations de la violence des victimes et des agresseurs. Nous proposons ici d’étudier les stratégies discursives mises en œuvre lors de la passation d’une déclaration devant le notaire et sur ce qu’elles révèlent de la société qui les produit. En effet, ces témoignages constituent une véritable mise en scène de la violence, qui est instrumentalisée afin d’obtenir gain de cause lors d’un conflit. Comment les comparants s’y prennent-ils ? Quels sont les topoï les plus souvent utilisés ? Observe-t-on une évolution de ces discours entre le XVIIe et le XVIIIe siècle ? Cette analyse permettra de mettre en lumière la manière dont la société attribuait différents seuils de gravité à des actes violents, leurs circonstances aggravantes et comment ces représentations de la société étaient sciemment utilisées par les intervenants pour déconstruire la gravité de leurs actes. Enfin, étudier la violence et les discours des personnes impliquées permet également une meilleure compréhension de phénomènes sociaux que nous proposons de souligner, comme l’importance de l’honneur et sa place essentielle dans la société d’Ancien Régime. [less ▲]

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See detailSparse plus low-rank autoregressive identification in neuroimaging time series
Liegeois, Raphaël ULg; Mishra, Bamdev ULg; Zorzi, Mattia et al

in Proceedings of CDC 2015 (2016)

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See detailNoWaste: waste heat re-use for greener truck
Bettoja, Federica; Perosino, Andrea; Lemort, Vincent ULg et al

in Proceedings of 6th Transport Research Arena (2016)

The present paper summarizes the key points of the European NoWaste Project, which aims at developing Rankine cycle systems for integration into long-haul trucks with the aim to convert the waste heat of ... [more ▼]

The present paper summarizes the key points of the European NoWaste Project, which aims at developing Rankine cycle systems for integration into long-haul trucks with the aim to convert the waste heat of the exhaust gases into useful energy usable in mechanical or electrical form. The first part of the paper describes the ORC system architectures defined for two different truck engines: one with EGR and the other one without EGR. For both engines, different cycle configurations and working fluids are compared in terms of energy performance and technical constraints. For both ORC systems, the paper shows the final technical choices made in terms of main components: boiler, condenser, expander and pump. The second part of the paper presents preliminary experimental results carried out on demonstrators of the two ORC systems. The objectives of these tests were to check the performance announced by the components’ manufacturers. Finally, the last part of the paper compares the cost of both systems. [less ▲]

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See detailStockage de chaleur en aquifère et flexibilité de la demande électrique: quelles possibilités?
Paulus, Claire; Bolly, Pierre-Yves; Hermans, Thomas ULg et al

in Proceedings des 34e rencontres universitaires du Génie Civil de l'AUGC (2016)

In the context of energy demand side management (EDSM) and heat storage in aquifers, the design and functioning of aquifer thermal energy storage (ATES) systems have strong interconnections with the ... [more ▼]

In the context of energy demand side management (EDSM) and heat storage in aquifers, the design and functioning of aquifer thermal energy storage (ATES) systems have strong interconnections with the geology of the site which may be complex and heterogeneous, making predictions difficult. In this context, we developed a subsurface monitoring methodology to better characterize heat transfer in the subsurface with the help of 4D electrical resistivity tomography (ERT), multiple hydrological measurements in wells, and a short-term heat storage experiment conducted for the purpose in a confined alluvial aquifer. Results clearly show the ability of ERT to delimit the thermal plume growth during injection, the diffusion and decrease of temperature during storage, and the decrease in size after heat recovery. Energy balance shows that up to 70% of the energy can be easily recovered with an adapted strategy in the context of DSM. Short-term heat storage in alluvial aquifer is efficient and ERT is a valuable tool to image and estimate the temperature distribution in the subsurface. [less ▲]

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See detailintroduction et inter-duction; les règles du jeu.
Bodart, Céline ULg

in YOUNES, Chris; BONNAUD, Xavier; Bodart, Céline (Eds.) Encore l'architecture, encore la philosophie. (2016)

The international conference « encore l'architecture – encore la philosophie » is an initiative of the GERPHAU lab, research group for Philosophy, Architecture, Urban (Architecture School of Paris La ... [more ▼]

The international conference « encore l'architecture – encore la philosophie » is an initiative of the GERPHAU lab, research group for Philosophy, Architecture, Urban (Architecture School of Paris La Villette, UMR 7218 CNRS-Lavue), in partnership with Cité de l'architecture et du patrimoine, UMR-Lavue (Laboratoire Architecture, Ville, Urbanisme, Environnement) and philAU (a scientific thematic network : Philosophy, Architecture, Urban). This conference is the first ARENA conference (Architectural Research in Europe Network Association), a shared platform that aims to promote, support, develop and disseminate high-quality research in all fields of architecture in the widest sense. The network already includes researchers from leading European architecture schools. Synopsis. In Paris in 1987, a first event was held to celebrate the meeting of two disciplinary fields, entitled “Mesure pour mesure, architecture et philosophie”. Architects and philosophers were invited to discuss together how philosophy could capture better what determines architecture itself. Now, on the occasion of a new international conference, the GERPHAU Lab seeks to restate and refresh the question of the meeting of architecture and philosophy, by asking: what still remains today of our cross-over practices? ENCORE L'ARCHITECTURE, ENCORE LA PHILOSOPHIE. To build together these reflections about the future of our respective practices, why don't we hold to the hypothesis that our recent histories, in architecture as well as philosophy, could be written through the addition of a few prefixes? In linguistics, a prefix does not only serve the formation of a new word: it also regenerates the question of the meaning of the word. It is a discursive invention and its real strength lies in its ability to engage a new type of relationship with the world. Re-, alter-, eco-, co-, bio-, etc., these prefixes have clung to both our discourses as well as our disciplines. But in what way do they question the meaning of our practices? In archi-tecture as in philo-sophy, how do these successive re-definitions put the fundamentals into question, and how do they disturb their alleged unity inherited from Ancient Greece? And, moreover, how does the over-use of prefixes help us to understand what still makes sense in philosophy, or what still makes sense in architecture? The key issue of this conference, ‘Encore l'architecture, Encore la philosophie’, will be to trace backwards the stream of architectural and philosophical ideas through the thematic of the prefix as constituting a form of narrative. The conference will aim to trace the paths of their development, and other influencing factors, so as to return to those meetings between architecture and philosophy which already have oriented, re-oriented and sometimes dis-oriented our speech. It will be a meeting at which we invite participants to retell the story of our disciplines in order to grasp what it is still unique today about our practices. [less ▲]

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See detailExtraction of temporal gait parameters using a reduced number of wearable accelerometers
Boutaayamou, Mohamed ULg; Denoël, Vincent ULg; Bruls, Olivier ULg et al

in Proceedings of the 9th International Conference on Bio-inspired Systems and Signal Processing (2016)

Wearable inertial systems often require many sensing units in order to reach an accurate extraction of temporal gait parameters. Reconciling easy and fast handling in daily clinical use and accurate ... [more ▼]

Wearable inertial systems often require many sensing units in order to reach an accurate extraction of temporal gait parameters. Reconciling easy and fast handling in daily clinical use and accurate extraction of a substantial number of relevant gait parameters is a challenge. This paper describes the implementation of a new accelerometer-based method that accurately and precisely detects gait events/parameters from acceleration signals measured from only two accelerometers attached on the heels of the subject’s usual shoes. The first step of the proposed method uses a gait segmentation based on the continuous wavelet transform (CWT) that provides only a rough estimation of motionless periods defining relevant local acceleration signals. The second step uses the CWT and a novel piecewise-linear fitting technique to accurately extract, from these local acceleration signals, gait events, each labelled as heel strike (HS), toe strike (TS), heel-off (HO), toe-off (TO), or heel clearance (HC). A stride-by-stride validation of these extracted gait events was carried out by comparing the results with reference data provided by a kinematic 3D analysis system (used as gold standard) and a video camera. The temporal accuracy ± precision of the gait events were for HS: 7.2 ms ± 22.1 ms, TS: 0.7 ms ± 19.0 ms, HO: ‒3.4 ms ± 27.4 ms, TO: 2.2 ms ± 15.7 ms, and HC: 3.2 ms ± 17.9 ms. In addition, the occurrence times of right/left stance, swing, and stride phases were estimated with a mean error of ‒6 ms ± 15 ms, ‒5 ms ± 17 ms, and ‒6 ms ± 17 ms, respectively. The accuracy and precision achieved by the extraction algorithm for healthy subjects, the simplification of the hardware (through the reduction of the number of accelerometer units required), and the validation results obtained, convince us that the proposed accelerometer-based system could be extended for assessing pathological gait (e.g., for patients with Parkinson’s disease). [less ▲]

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See detailEffects of acoustic degradations on cover song identification systems
Osmalsky, Julien ULg; Embrechts, Jean-Jacques ULg

in International Congress on Acoustics: ICA 2016 (2016)

Cover song identification systems deal with the problem of identifying different versions of an audio query in a reference database. Such systems involve the computation of pairwise similarity scores ... [more ▼]

Cover song identification systems deal with the problem of identifying different versions of an audio query in a reference database. Such systems involve the computation of pairwise similarity scores between a query and all the tracks of a database. The usual way of evaluating such systems is to use a set of audio queries, extract features from them, and compare them to other tracks in the database to report diverse statistics. Databases in such research are usually designed in a controlled environment, with relatively clean audio signals. However, in real life conditions, audio signals can be seriously modified due to acoustic degradations. For example, depending on the context, audio can be modified by room reverberation, or by added hands clapping noise in a live concert, etc. In this paper, we study how environmental audio degradations affect the performance of several state-of-the-arty cover song recognition systems. In particular, we study how reverberation, ambient noise and distortion affect the performance of the systems. We further investigate the effect of recording or playing music through a smartphone for music recognition. To achieve this, we use an audio degradation toolbox to degrade the set of queries to be evaluated. We propose a comparison of the performance achieved with cover song identification systems based on several harmonic and timbre features under ideal and noisy conditions. We demonstrate that the performance depends strongly on the degradation method applied to the source, and quantify the performance using multiple statistics. [less ▲]

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See detailL'appartement des bains et le cabinet des peintures du château de Fontainebleau sous le règne d'Henri IV
Fagnart, Laure ULg

in Nativel, Colette (Ed.) Henri IV. Art et pouvoir (2016)

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See detailAssessing the effect of traveler's nationality on daily travel time expenditure using Zero-Inflated Negative Binomial Regression models: results from the Belgian national household travel survey.
Eftekhar, Hamed ULg; Creemers, Lieve; Cools, Mario ULg

in Proceedings of the 95th Annual Meeting of the Transportation Research Board (2016)

In this paper, the effect of traveler's nationality on daily travel time expenditure is assessed using data stemming from the 2010 Belgian national household travel survey. In particular, different (zero ... [more ▼]

In this paper, the effect of traveler's nationality on daily travel time expenditure is assessed using data stemming from the 2010 Belgian national household travel survey. In particular, different (zero-inflated) negative binomial models were estimated to isolate the effect of nationality, after controlling for other contributing factors such as socio-demographics, residential characteristics, transport options and temporal characteristics. The results indicate that, even if one controls for a series of other influencing factors, nationality plays a significant role in differences in travel time expenditure. This finding is especially relevant in the development of policy packages that are targeted to tackle social inequalities. From a methodological perspective, different methodological options, i.e. two weighting schemes and two bootstrap solutions, were presented to provide sufficient support for the conclusions. In order to generalize the results in further studies, an oversampling of travelers with a different nationality is strongly recommended. Future research should focus more on the underlying psychological constructs of why ethnic and cultural differences persist, even if one accounts for other determinants. [less ▲]

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See detailNew challenges for the Vietnamese aquaculture sector
Nguyen Thi Khanh Hong, ULg; Tran Thi Nang Thu; Lebailly, Philippe ULg

in Nanhua University; Vietnam University of Commerce; Hue College of Economics (Eds.) International Conference "The economy of Vietnam in the integration period: opportunities and challenges: Proceedings (2016)

The supply chain of seafood in Vietnam has not been effectively designed and operated, and has not contributed to the sustainability of the sector. Problems include the protection of resources ... [more ▼]

The supply chain of seafood in Vietnam has not been effectively designed and operated, and has not contributed to the sustainability of the sector. Problems include the protection of resources, limitations in traceability, food safety issues and lack of branding/eco-certification. The objective of this article is first to characterize the recent development of this sector of economic activity. Particular attention will be linked to the importance of aquaculture in the trade balance of Vietnam. The authors also describe the issues that arise in the various constituent links in the aquaculture industry in Vietnam. [less ▲]

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See detailAn approach for detection of glomeruli in multisite digital pathology
Marée, Raphaël ULg; Olivo-Marin, Jean-Christophe; Meas-Yedid, Vannary

in Proceedings International Symposium on Biomedical Imaging (2016)

We present a novel bioimage informatics workflow that combines Icy and Cytomine software and their algorithms to enable large-scale analysis of digital slides from multiple sites. In particular, we apply ... [more ▼]

We present a novel bioimage informatics workflow that combines Icy and Cytomine software and their algorithms to enable large-scale analysis of digital slides from multiple sites. In particular, we apply this workflow on renal biopsies and evaluate empirically our approach for the automatic detection of glomeruli in hundreds of tissue sections. [less ▲]

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See detailImpact of the new Common Agricultural Policy (2015-2020) on the value of direct payments and on farmers’ income in Wallonia (South of Belgium)
Burny, Philippe ULg; Terrones Gavira, François ULg

in Kyriazopoulos, G.; Petropoulos, D. (Eds.) 1st International Conference of Development and Economy (ICODECON) 2-4 October 2015: The advantages and disadvantages of Economic Crises: Conference proceedings (2016)

A new Common Agricultural Policy was defined in 2013, with a new structure for direct payment. In Wallonia, the government implemented the following scheme: 30% for the green payment, 29.9% for the basic ... [more ▼]

A new Common Agricultural Policy was defined in 2013, with a new structure for direct payment. In Wallonia, the government implemented the following scheme: 30% for the green payment, 29.9% for the basic payment, 17% for the additional payment for the first 30 ha, 1.8% for young farmers and 21.3% for couple payments. Due to convergence, the mean support through direct payments will decline from 21,900 € in 2014 to 19,283 € in 2019. The number of losers will be equivalent to the number of gainers. Regions where cereals and sugar beet are produced will lose the most, where the region suitable for cattle raising will gain somewhat. There will be a better distribution of direct payments among farmers: the Gini index will decline from 0.55 to 0.49. The highest negative impact on income will occur for the specialties “green crops”, “crops and dairy cattle” and “crops and non-dairy cattle”: the least negative impact will be observed within the specialties “dairy cattle”, “meat cattle” and “dairy and meat cattle”. The reform will be more profitable for the farms from 30 to 50 ha and will mainly impact the largest farms. Finally, the CAP reform implemented in Wallonia guarantees a smooth evolution to 2020. [less ▲]

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See detailMethodology to model the energy vulnerability of households in Europe based on the current mapping of fuel poverty and transport poverty and its likely evolution until 2040
Pierson, Charlotte; Reiter, Sigrid ULg

in Proceedings of the Urban Transition Global Summit 2016 (2016)

Fuel poverty refers to a situation in which an individual or household is not able to meet their basic energy needs. Fuel poverty is currently growing in the European Union. Research in this field is ... [more ▼]

Fuel poverty refers to a situation in which an individual or household is not able to meet their basic energy needs. Fuel poverty is currently growing in the European Union. Research in this field is often limited to the assessment of the current risk of fuel poverty based on energy consumptions due to housing. Urban sprawl generates a significant increase in energy consumption related to daily mobility, which generates energy poverty related to transportation needs. This article presents a methodology for modeling the current and future energy poverty of households in Europe on the basis of energy consumptions due to housing, to daily mobility and their combination. Indicators for fuel poverty and transport poverty will be based on Hills’ method, which is widely recognized internationally for fuel poverty assessment and which takes into account two thresholds: energy expenses of households and their available residual income. This article will outline the spatial modeling process of energy costs due to dwellings and mobility thanks to the coupling of a GIS tool, cadastral datasets, existing methods for the assessment of buildings and transport energy consumptions and updated databases (EPB certificates, detailed mobility surveys, data from smart meters, mobile phones and GPS). Different scenarios will be selected to predict the evolution of fuel and transport poverty until 2040 on the basis of national and European prospective studies or, alternatively, based on the historical evaluation of some key parameters and their extrapolation. The evolution of built-up areas will be model thanks to the multinomial logistic regression model (MLR) that enables to visualize the consequence of different urban densities expansion. The different parameters that will influence the evolution of fuel and transport poverty until 2040 will be highlighted (climate change, urban expansion, fuel prices, energy performance of buildings and vehicles, etc.). [less ▲]

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See detailBack to the Text: Artists’ Recipe Books as Source for Historical Research in Art Technology
Neven, Sylvie ULg

in Sources on Art Technology : Back to Basics (2016)

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See detailMultivariate ARMA Based Modal Identification of a Time-varying Beam
Bertha, Mathieu ULg; Golinval, Jean-Claude ULg

in Proceedings of the International Modal Analysis Conference (IMAC) XXXIV (2016)

The present paper addresses the problem of modal identification of time-varying systems. The identification is based on a multivariate autoregressive moving-average model in which the time variability of ... [more ▼]

The present paper addresses the problem of modal identification of time-varying systems. The identification is based on a multivariate autoregressive moving-average model in which the time variability of the system is caught using a basis functions approach. In this approach, the time-varying regressive coefficients in the model are expended in the chosen basis functions and only the projection coefficients have to be identified. In that way, the initial time-varying problem then becomes a time-invariant one that can be solved. Because a multivariate model is used, in addition to the time-varying poles, the time-varying mode shapes may be identified too. The method is first presented and then applied on an experimental demonstration structure. The experimental structure consists of a supported beam on which a mass is travelling. The mass is chosen sufficiently large to have a significant influence on the dynamics of the primary system. This kind of problem is a classical example commonly used by many authors to test time-varying identification methods. [less ▲]

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See detailEnvironmental Impact Assessment of Rail Freight Intermodality
Merchan Arribas, Angel ULg; Belboom, Sandra ULg; Léonard, Angélique ULg

in Pombo, Joao (Ed.) The Third International Conference on Railway Technology: Research, Development and Maintenance (2016)

The European Commission’s White Paper on transport seeks to achieve an efficient and sustainable balance between the various transport modes. In this context, BRAIN-TRAINS is a project supported by ... [more ▼]

The European Commission’s White Paper on transport seeks to achieve an efficient and sustainable balance between the various transport modes. In this context, BRAIN-TRAINS is a project supported by Belgian Federal Government that deals with rail freight intermodality, approaching the problem from an interdisciplinary perspective. BRAIN-TRAINS will be able to answer the transition involved in transportation in Belgium. To analyse the sustainability impact of rail freight intermodality in Belgium, the life cycle assessment methodology will be used. The rail freight system is divided in this paper into rail operation, rail equipment and rail infrastructure. This paper shows the methodology to calculate the transport emissions related with the energy consumption during the rail operation. [less ▲]

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See detailThe syntax-semantics Interface in Earlier Egyptian: A Case study in Verbs of Cognition
Winand, Jean ULg

in Coping with Obscurity: The Brown Workshop on Earlier Egyptian Grammar (2016)

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See detailViolence, obstruction augurale et crise de la République romaine
Berthelet, Yann ULg

in Gilhaus, Lennart; Kirsch, Stephanie; Mossong, Isabelle (Eds.) et al Elite und Krise in antiken Gesellschaften / Élites et crises dans les sociétés antiques (2016)

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See detailTechno-economic optimization of isolate micro-grids including PV and Li-Ion Batteries in the Bolivian context
Balderrama, Sergio; Canedo, Walter; Lemort, Vincent ULg et al

in Proceedings of ECOS 2016 - the 29th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (2016)

In Bolivia 44 % of the people living in rural areas do not have reliable access to electric energy. This is due to a combination of unfavourable geography and the lack of economic resources to achieve the ... [more ▼]

In Bolivia 44 % of the people living in rural areas do not have reliable access to electric energy. This is due to a combination of unfavourable geography and the lack of economic resources to achieve the necessary infrastructure. In this context, the main goal of this study is to evaluate the economic and technical feasibility of micro-grids including photovoltaic panels (PV), batteries systems and the possible inclusion of diesel generators for off-grid applications. To that aim, a linear optimization model was developed within the Pyomo framework in order to optimize both the installed capacities and dispatch of the PV, battery and diesel sub-systems. The defined objective function is the net present cost. The exogenous inputs of the optimization are the typical demand and solar irradiation of a region of Bolivia in order to achieve results close to real Bolivian systems. Results indicate that due to the high levels of subvention to hydrocarbons, the PV and Li-Ion technology are not yet competitive with a diesel generator for the electrification of rural areas. On the other hand a sensitivity analysis is performed and proves that if the government decide to stop part of the subvention or shared it between conventional and non-conventional sources, the PV becomes competitive and the Li-Ion batteries enter the market around 2020. [less ▲]

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See detailA new index to measure the human well-being in Wallonia and its communes (South of Belgium)
Burny, Philippe ULg

in Petropoulos, D.; Kyriazopoulos, G. (Eds.) 1st International Conference of Development and Economy (ICODECON) 2-4 October 2015: The advantages and disadvantages of Economic Crises: Conference proceedings (2016)

In 2012, the Walloon Government ordered the Walloon Institute for Prospective, Evaluation and Statistics (IWEPS) to calculate five indexes in order to guide and evaluate the public actions, together with ... [more ▼]

In 2012, the Walloon Government ordered the Walloon Institute for Prospective, Evaluation and Statistics (IWEPS) to calculate five indexes in order to guide and evaluate the public actions, together with the GDP. The index for the conditions of human well-being (CWBI) is presently the first step in the elaboration of the wellbeing index. The methodology is the one used by the Council of Europe. Actually, the CWBI is calculated by using 60 basic indicators, gathered into 8 families. After normalisation, the CWBI is the arithmetic mean of the 60 basic indicators, each of them having the same weight. The CWBI was calculated for the 262 communes of Wallonia and varies from 0.428 to 0.674, with a regional mean of 0.572. An opposition between urban and rural communes clearly appears, the last ones having the best scores. Communes along the borders of Germany and Luxemburg have the highest indexes, while communes in the old industrial areas have the lowest scores. Employment, income, family relations and security are the factors which are the most narrowly linked to the CWBI. At the communal level, social and security expenses per capita have a significant and negative correlation coefficient with the CWBI. In the future, in order to elaborate a finer index, new data, up to now not directly available, will be collected at the communal level, about quantitative and qualitative aspects. [less ▲]

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See detail: « Les aventures de Leo Frobenius au Congo » : l’histoire d’une expédition ethnographique et de ses suites judiciaires, à la lumière des archives coloniales
Braillon, Charlotte ULg

in Leo Frobenius : histoire croisée de la constitution et de l'approche d'un savoir ethnologique en France et en Allemagne. Actes du colloque des 19 -20 février 2014 à la Goethe-Universität (2016)

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See detailThe ULg Multimodality Drowsiness Database (called DROZY) and examples of use
Massoz, Quentin ULg; Langohr, Thomas ULg; François, Clémentine ULg et al

in Proceedings of the 2016 IEEE Winter Conference on Applications of Computer Vision (WACV) (2016)

Drowsiness is a major cause of accidents, in particular in road transportation. It is thus crucial to develop robust drowsiness monitoring systems. There is a widespread agreement that the best way to ... [more ▼]

Drowsiness is a major cause of accidents, in particular in road transportation. It is thus crucial to develop robust drowsiness monitoring systems. There is a widespread agreement that the best way to monitor drowsiness is by closely monitoring symptoms of drowsiness that are directly linked to the physiology of an operator such as a driver. The best systems are completely transparent to the operator until the moment he/she must react. In transportation, cameras placed in the passenger compartment and looking at least at the face of the driver are most likely the best way to sense physiology related symptoms such as facial expressions and the fine behavior of the eyeballs and eyelids. We present here the new database (available on http://www.drozy.ulg.ac.be) called DROZY that provides multiple modalities of data to tackle the design of drowsiness monitoring systems and related experiments. We also present two novel systems developed using this database that can make predictions about the speed of reaction of an operator by using near-infrared intensity and range images of his/her face. [less ▲]

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See detailMicroanalyzes of remarkable microfossils of the Late Mesoproterozoic–Early Neoproterozoic
Cornet, Yohan ULg; Beghin, Jérémie ULg; Kabamba Baludikay, Blaise ULg et al

in European Geosciences Union General Assembly 2016 Vienna, Austria, 2016 (2016)

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See detailImitative Learning for Online Planning in Microgrids
Aittahar, Samy ULg; François-Lavet, Vincent ULg; Lodeweyckx, Stefan et al

in Woon, Wei Lee; Zeyar, Aung; Stuart, Madnick (Eds.) Data Analytics for Renewable Energy Integration (2015, December 15)

This paper aims to design an algorithm dedicated to operational planning for microgrids in the challenging case where the scenarios of production and consumption are not known in advance. Using expert ... [more ▼]

This paper aims to design an algorithm dedicated to operational planning for microgrids in the challenging case where the scenarios of production and consumption are not known in advance. Using expert knowledge obtained from solving a family of linear programs, we build a learning set for training a decision-making agent. The empirical performances in terms of Levelized Energy Cost (LEC) of the obtained agent are compared to the expert performances obtained in the case where the scenarios are known in advance. Preliminary results are promising. [less ▲]

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See detailLA RENONCIATION, L’ABDICATION ET LA RUPTURE DU CONTRAT DE TRAVAIL
Kéfer, Fabienne ULg

in LA RUPTURE DU CONTRAT DE TRAVAIL : ENTRE HARMONISATION ET DISCRIMINATION (2015, December 04)

L’étude, limitée au contexte de la dissolution du contrat de travail, aborde, dans une première partie, la possibilité pour les parties au contrat de travail de renoncer au bénéfice d’une disposition ... [more ▼]

L’étude, limitée au contexte de la dissolution du contrat de travail, aborde, dans une première partie, la possibilité pour les parties au contrat de travail de renoncer au bénéfice d’une disposition, possibilité liée au caractère impératif ou d’ordre de la disposition en cause. Est particulièrement étudié le lien entre le rapport de subordination et la faculté d’abdiquer un droit. Le document effectue ensuite une incursion dans la question de la preuve de la renonciation. La troisième partie passe en revue un large éventail de droits auxquels les parties pourraient être tentées de renoncer : clauses d’écolage, clauses de stabilité d’emploi, renonciation au droit d’invoquer la rupture du contrat de travail en cas d’acte équipollent à rupture ou de préavis nul, renonciation à la durée du préavis ou à l’indemnité en tenant lieu, renonciation au reclassement professionnel, aux droits découlant d’une convention collective, renonciation par un délégué du personnel, renonciation par la voie d’une convention collective, etc. Si la matière reste incertaine à bien des égards, elle est aussi en évolution, tant par l’effet de la jurisprudence que par l’action de la loi, et notamment celle du 26 décembre 2013 dite « statut unique », qui a modifié de manière sensible le champ de la licéité des renonciations au délai ou à l’indemnité compensatoire de préavis. [less ▲]

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See detailEstimation de la quantité de matière sèche ingérée par les vaches laitières au pâturage en traite robotisée, utilisation de l’analyse des fèces en spectrométrie dans le proche infrarouge
Lessire, Françoise ULg; Dufrasne, Isabelle ULg; Decruyenaere, Virginie

in Agabriel, Jacques; Boichard, Didier; Choisis, Jean-Philippe (Eds.) et al 22èmes Rencontres autour des recherches sur les ruminants. (2015, December 02)

Malgré l’intérêt nutritionnel et économique de l’herbe dans la ration des vaches laitières, le pâturage est de plus en plus délaissé en raison notamment de l’automatisation de la traite et de l’extension ... [more ▼]

Malgré l’intérêt nutritionnel et économique de l’herbe dans la ration des vaches laitières, le pâturage est de plus en plus délaissé en raison notamment de l’automatisation de la traite et de l’extension de la taille des troupeaux. Une des raisons invoquées par les éleveurs pour cet abandon est leur manque de confiance par rapport aux quantités d’herbe réellement ingérées par les animaux et la crainte que ces apports inconstants se traduisent par des fluctuations de production laitière tant qualitative que quantitative. Or Decruyenaere et al. (2009, 2012) ont développé une méthode d’estimation de la matière sèche volontairement ingérée (MSVI) par analyse des bouses par spectrométrie dans le proche infra-rouge. Cette méthode présente l’avantage d’être non invasive, facile à mettre en œuvre sur le terrain et peu onéreuse. Le but de cette étude était donc d’évaluer l’utilisation de cette méthode dans un troupeau de vaches laitières traites par un robot mobile en pâture. Le troupeau (n=53) était divisé en 2 groupes dont le niveau de complémentation journalière était différent. Lors de la traite, le groupe 1 (GR1) recevait en moyenne 2,6 kg de concentrés/vache alors que le groupe 2 (GR2) en recevait 4,2 kg/vache. L’objectif était de vérifier l’impact du niveau de complémentation sur les résultats obtenus. Des prélèvements de fèces ont été faits une fois par mois sur 10 vaches (5 vaches par groupe) pendant 4 mois. Les spectres d’absorption dans le proche infra-rouge (NIR) ont été confrontés à des étalonnages NIR permettant l’estimation de la MSVI exprimée soit par rapport au poids vif (MSVI1), soit par rapport au poids métabolique (MSVI2). Ces estimations d’ingestion ont permis le calcul de la matière sèche journalière ingérée par vache (MSI1 et MSI2). Par ailleurs, les mesures d’herbe à l’entrée et à la sortie des parcelles pâturées ont été relevées ainsi que la densité du couvert herbacé pour évaluer la quantité d’herbe disponible. A ces valeurs de biomasses disponibles ont été additionnées des quantités de concentrés distribuées lors du passage des animaux au robot. Les valeurs moyennes de matière sèche ingérée (kg/vache/jour) pour le GR1 étaient de 15,20 ± 2,60 kg MS par la MSI1 et de 16,99 ± 1,80 kg MS pour la MSI2. Pour le GR2, la MSI1moyenne était de 20,20 ± 4,95 kg MS et la MSI2 moyenne de 21,95 ± 3,36 kg MS. L’estimation de la ration disponible par vache (kg MS herbe + kg MS concentrés) était de 17,25 ± 0,73 kg MS pour le GR1 et de 18,69 ±0,83 kg MS pour le GR2. Les valeurs obtenues par l’analyse NIR sont donc compatibles avec les quantités d’herbe et de concentrés disponibles. Les valeurs estimées par les 2 méthodes étaient hautement corrélées entre elles à part en période de faible ingestion (<10 kgMS). En ce cas la MSI2 semble donner des résultats plus fiables. En conclusion, l’analyse NIR des bouses apparaît une technique intéressante pour l’estimation de la quantité d’herbe ingérée au pâturage. [less ▲]

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See detailAsteroseismic hare & hound exercises: the case of β Cephei stars
Salmon, Sébastien ULg; Montalbán, J.; Miglio, A. et al

in Martins, F.; Boissier, S.; Buat, V. (Eds.) et al SF2A-2015: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics. Eds.: F. Martins, S. Boissier, V. Buat, L. Cambrésy, P. Petit, pp.423-428 (2015, December 01)

The β Cephei pulsating stars present a unique opportunity to test and probe our knowledge of the interior of massive stars. The information that we can get depends on the quality and number of ... [more ▼]

The β Cephei pulsating stars present a unique opportunity to test and probe our knowledge of the interior of massive stars. The information that we can get depends on the quality and number of observational constraints, both seismic and classical ones. The asteroseismology of β Cephei stars proceeds by a forward approach, which can result in multiple solutions, without clear indication on the level of confidence. We seek a method to derive confidence intervals on stellar parameters and investigate how these latter behave depending on the seismic data accessible to the observer. We realise forward modelling with the help of a grid of pre-computed models. We also use Monte-Carlo simulations to build confidence intervals on the inferred stellar parameters. We apply and test this method in a series of hare and hound exercises on a subset of theoretical models simulating observed stars. Results show that a set of 5 frequencies (with knowledge of their associated angular degree) yields precise seismic constraints. Significant errors on the determination of the extent of the central mixed region may result when the theoretical models do not present the same chemical mixture as the observed star. [less ▲]

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See detailSwitch from Hashimoto Thyroiditis (HT) to Graves Basedow (GB) disease : a controlled study in a series of 15 patients
Maiga, I; BETEA, Daniela ULg; Geenen, Vincent ULg et al

in Abstract book - 20th Annual Congress of the Belgian Society of Internal Medicine (2015, December)

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See detailTowards DisNETPerf: a Distributed Internet Paths Performance Analyzer
Wassermann, Sarah ULg; Casas, Pedro; Donnet, Benoît ULg

in ACM CoNEXT Student Workshop: Heidelberg 1 décembre 2015 (2015, December)

For more than 25 years now, traceroute has demonstrated its supremacy for network-path measurement, becoming the most widely used Internet path diagnosis tool today. A major limitation of traceroute when ... [more ▼]

For more than 25 years now, traceroute has demonstrated its supremacy for network-path measurement, becoming the most widely used Internet path diagnosis tool today. A major limitation of traceroute when the destination is not controllable by the user is its inability to measure reverse paths, i.e., the path from a destination back to the source. Proposed techniques to address this issue rely on IP address spoofing, which might lead to security concerns. In this paper we introduce and evaluate DisNETPerf, a new tool for locating probes that are the closest to a distant server. Those probes are then used to collect data from the server point-of-view to the service user for path performance monitoring and troubleshooting purposes. We propose two techniques for probe location, and demonstrate that the reverse path can be measured with very high accuracy in certain scenarios. [less ▲]

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See detailFamilial thyrogastric autoimmune syndrome : a study of 22 kindreds
Sid, Sélim ULg; LUTTERI, Laurence ULg; BEGUIN, Yves ULg et al

in Abstract book - 20th Annual Congress of the Belgian Society of Internal Medicine (2015, December)

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See detailHow to Discount Deep Reinforcement Learning: Towards New Dynamic Strategies
François-Lavet, Vincent ULg; Fonteneau, Raphaël ULg; Ernst, Damien ULg

in NIPS 2015 Workshop on Deep Reinforcement Learning (2015, December)

Using deep neural nets as function approximator for reinforcement learning tasks have recently been shown to be very powerful for solving problems approaching real-world complexity. Using these results as ... [more ▼]

Using deep neural nets as function approximator for reinforcement learning tasks have recently been shown to be very powerful for solving problems approaching real-world complexity. Using these results as a benchmark, we discuss the role that the discount factor may play in the quality of the learning process of a deep Q-network (DQN). When the discount factor progressively increases up to its final value, we empirically show that it is possible to significantly reduce the number of learning steps. When used in conjunction with a varying learning rate, we empirically show that it outperforms original DQN on several experiments. We relate this phenomenon with the instabilities of neural networks when they are used in an approximate Dynamic Programming setting. We also describe the possibility to fall within a local optimum during the learning process, thus connecting our discussion with the exploration/exploitation dilemma. [less ▲]

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See detailSaint Paul 3D - Acquisition tridimensionnelle de la cathédrale via LaserScan
Hallot, Pierre ULg

in Journée d'étude organisée par l'Institut du Patrimoine Wallon et le Comité Patrimoine et Histoire de la FABI (2015, November 27)

Les nouvelles techniques LiDAR (Light Detection and Ranging) et photogrammétriques permettent d’acquérir rapidement un volume important de données 3D. Le terme LiDAR désigne tout instrument de mesure ... [more ▼]

Les nouvelles techniques LiDAR (Light Detection and Ranging) et photogrammétriques permettent d’acquérir rapidement un volume important de données 3D. Le terme LiDAR désigne tout instrument de mesure (terrestre, aéroporté) basé sur l’analyse des propriétés d’un faisceau renvoyé vers un émetteur (Poux et al. 2014). Conscient de l’énorme potentiel de ces techniques, l’Unité de Géomatique de l’Université de Liège a réalisé la numérisation de la Cathédrale Saint‐Paul de Liège. Ce projet a été initié via une collaboration avec le Matthieu Piavaux (FUNDP) et financée par le FNRS. Au‐delà des aspects de conservation et d’analyse du bâti, cette numérisation nous a permis de mettre en lumière les principes et limitations de la technique même d’acquisition de données 3D via LiDAR ainsi que ses limitations tant matérielles (sur terrain) que logicielles (traitement des données). Le jeu de donnée obtenu de la numérisation sert également de base fondamentale à un ensemble de projets de recherches (notamment via la réalisation de thèses de doctorats) visant à la segmentation automatique de nuages de points, de reconstruction d’objets tridimensionnelles, d’analyse de qualité d’ajustements. Par la suite, nous détaillons la méthodologie utilisée pour l’acquisition du nuage de points 3D ainsi que les différents principes de calage de nuages. Le chapitre suivant sera consacré à la présentation de résultats ainsi que de premiers développements en termes de segmentation automatique. Finalement, nous dresserons quelques perspectives de représentations. [less ▲]

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See detailCardio-pulmonary mechanics and minimal modelling in critical care
de Bournonville, Sébastien; Pironet, Antoine ULg; Desaive, Thomas ULg et al

in Proceedings of the IEEE-EMBS Benelux chapter 2015 meeting (2015, November 26)

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See detailParameter Correlation Analysis in Four Mathematical Models of Left Ventricular Relaxation
Pironet, Antoine ULg; MORIMONT, Philippe ULg; Dauby, Pierre ULg et al

in Proceedings of the IEEE-EMBS Benelux chapter 2015 meeting (2015, November 26)

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See detailA Lightweight Network Proximity Service Based On Neighborhood Models
Liao, Yongjun; Du, Wei; Leduc, Guy ULg

in 22nd IEEE Symposium on Communications and Vehicular Technology in the Benelux (SCVT) (2015, November 24)

This paper proposes a network proximity service based on the neighborhood models used in recommender systems. Unlike previous approaches, our service infers network proximity without trying to recover the ... [more ▼]

This paper proposes a network proximity service based on the neighborhood models used in recommender systems. Unlike previous approaches, our service infers network proximity without trying to recover the latency between network nodes. By asking each node to probe a number of landmark nodes which can be servers at Google, Yahoo and Facebook, etc., a simple proximity measure is computed and allows the direct ranking and rating of network nodes by their proximity to a target node. The service is thus lightweight and can be easily deployed in e.g. P2P and CDN applications. Simulations on existing datasets and experiments with a deployment over PlanetLab showed that our service achieves an accurate proximity inference that is comparable to state-of-the-art latency prediction approaches, while being much simpler. [less ▲]

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See detailL’Entéropathie Epizootique des lapins : passé, présent et futur
Marlier, Didier ULg

in ITAVI (Ed.) Proceedings des 16èmes journées de la recherche cunicole (2015, November 24)

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See detailDeterminants of Access to Agricultural Credits for Small Scale Farmers in the Southern Province of Rwanda
Musabanganji, Edouard ULg; Antoine, Karangwa; Lebailly, Philippe ULg

in Book of Proceedings Sixth International Scientific Agricultural Symposium "AgroSym 2015" (2015, November 15)

This study investigated the determinants of financial inclusion for small scale farmers by focusing on the access to formal and informal agricultural credits in the Southern Province of Rwanda. Data were ... [more ▼]

This study investigated the determinants of financial inclusion for small scale farmers by focusing on the access to formal and informal agricultural credits in the Southern Province of Rwanda. Data were collected from 310 farmers from Huye and Nyamagabe districts through an open-ended structured questionnaire and analysed using the binary logistic regression method. The major findings, on one hand, showed that among the requested and approved agricultural loans, 87.2% and 12.7% were from informal and formal financial institutions respectively. Among those who accessed agricultural credits, 59.7% were from Huye and 40.3% from Nyamagabe. On the other hand, it was revealed that the household characteristics and the community attributes are the most important determinants. Those household characteristics include household income and expenditure, Ubudehe socio-economic category of the household, off-farm employment and the size of the land owned by the household whereas community attributes involve residence area, transport and informal financial services availability. Regarding farmer characteristics, the education level was found to be the only factor affecting the smallholder farmers' access to agricultural credit. In light of the findings, it was recommended to conduct sensitization sessions focusing on the importance of agricultural credits for smallholder farmers especially in the areas with high level of poverty. In addition, there is need to work on alleviating the formal agricultural credits access barriers, and to conduct a study on the dynamics of informal and formal agricultural credits up take and usage by smallholder farmers to explore all dimensions of financial inclusion in the study area. [less ▲]

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See detailFROM METABOLOMICS STUDY OF AGE RELATED MACULAR DEGENERATION (AMD) TO THE DEVELOPMENT OF NEW PDK INHIBITORS
Arslan, Deniz ULg; Schoumacher, Matthieu ULg; Pirotte, Bernard ULg et al

in Arslan, Deniz (Ed.) Gazi Pharma Symposium Abstract Book (2015, November 12)

Metabolomics is one of the most recent technologies in the Omics sciences defined as “the comprehensive characterization of small molecules (called metabolites) in different biological samples.” This ... [more ▼]

Metabolomics is one of the most recent technologies in the Omics sciences defined as “the comprehensive characterization of small molecules (called metabolites) in different biological samples.” This methodology can be applied in many areas, such as biomarker discovery, clinical studies, drug efficacy and toxicity evaluation, diagnostic tools, quality control or drug discovery. Its capability to extract biochemical information associated with a cellular or biological system makes this technique a powerful tool for Medicinal Chemistry. In this work, we present a 1H NMR metabolomics study applied to therapeutic target discovery. Age-related macular degeneration (AMD) is a leading cause of blindness in the elderly population of industrialized countries. This blindness results from the deterioration of the macula, a small part of the retina specialized for the high-acuity vision. Exudative AMD, called “wet”, is characterized by the formation of new blood vessels growing under the retina according to a process named choroidal neovascularization (CNV). Currently, the aetiology and pathogenesis of AMD remain unclear. Nevertheless, a recent metabolomics study performed on the serum of “wet” AMD patients and on a CNV murine model, that mimics the effect of “wet” AMD, have demonstrated that lactate level is clearly involved in the severity of the pathology as well as the relationship between lactate, CNV and AMD. According to this result, we suggest a new therapeutic approach of AMD based on the normalization of blood lactate level. The modulation of the lactate plasma concentration by treatment of the animals with synthetic compounds and more specifically Pyruvate Dehydrogenase Kinase (PDK) inhibitors significantly decrease the CNV. Starting from these results, development of new PDK inhibitors could open the way to innovative treatment opportunities in AMD disease. [less ▲]

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See detailThe Roll of Small Businesses in Traditional Handcraft in Rural Development: A Case-Study Of Hanoi Suburban Rattan Enterprises
Nguyen, Thi Thu Hien ULg; Lebailly, Philippe ULg; NGUYEN, Van Nghien

in International Conference on Emerging Challenges, Hanoi 12 november 2015 (2015, November 12)

Rural industrial development and new rural development programmes are the main target of Vietnam in the process of industrialization – modernization of the country. To expedite this process, it is ... [more ▼]

Rural industrial development and new rural development programmes are the main target of Vietnam in the process of industrialization – modernization of the country. To expedite this process, it is necessary to promote the development and encourage the contributions of small enterprise in general and small enterprise rural in particular because practices in many countries show the important role of small and micro enterprises in local development. This paper presents the initial results of research to understand the economic–social contributions of rural enterprises to local development through the mobilization of local resources as well as establishment of the economic-social relations in local of rattan’s enterprises in the suburb of Hanoi, and then propose some measures to facilitate the operation of enterprises and promote the contribution of rattan’s enterprises for local development. [less ▲]

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See detailAdaptive Façades System Assessment: An initial review
Attia, Shady ULg; Favoino, Fabio; Loonen, Roel et al

in Advanced Building Skins (2015, November 03)

The assessment of adaptive facades presents a challenge because there is no established evaluation strategy to systematically reach this goal and many of the available building energy standards and codes ... [more ▼]

The assessment of adaptive facades presents a challenge because there is no established evaluation strategy to systematically reach this goal and many of the available building energy standards and codes have limited applicability for such advanced facades system. This paper reviews current evaluation methods for assessing adaptive facades system through a literature review. It also discusses occupant behaviour, post occupancy evaluation and commissioning issues and presents the procedures. The paper is part of the activities of Working Group 3 in COST Action TU1403 - Adaptive Facades Network. So far we could not find a protocol for assessment of adaptive facades. The reviewed literature is scattered lacking a focus on adaptive facades. There is no agreement on defining what are adaptive facades (sometimes named intelligent, smart, dynamic). We could define specialized technology monitoring techniques to assess the performance of technologies such as fabric-integrated solutions (e.g. electrochromic glazing, phase-change materials, building-Integrated Photovoltaics with heat recovery (BIPV/T, shade shutters) and advanced controls. The review is used to identify gaps in existing assessment methods and helps develop strategies for the holistic evaluation and assessment of adaptive facade systems as part of high performance buildings. [less ▲]

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See detailGustave Serrurier-Bovy, architecte, commerçant et industriel
Folville, Xavier ULg

in Art nouveau et écologie : Mélanges (2015, November 01)

« Il ne faut pas travailler pour un monde qui disparaît mais pour un monde nouveau dont on peut prévoir l’avènement ». Architecte par vocation et formation, puis commerçant, ensuite créateur et industriel ... [more ▼]

« Il ne faut pas travailler pour un monde qui disparaît mais pour un monde nouveau dont on peut prévoir l’avènement ». Architecte par vocation et formation, puis commerçant, ensuite créateur et industriel, le Liégeois Gustave Serrurier (1858-1910) est rapidement convaincu de la nécessité de lier l’architecture aux arts décoratifs. Il le fait avec la conviction politique et esthétique qu’une production industrialisée permettra de donner au plus grand nombre l’environnement artistique auquel tout être peut prétendre. Il pressent que le temps de l’artisanat est en passe d’être révolu et équipe progressivement ses ateliers de machines modernes. Si ses premières créations restent empreintes de l’esprit constructif des artisans néogothiques, s’il emploie ensuite des jeux de lignes courbes, tendues et maîtrisées, le début du XXe siècle le voit évoluer vers toujours plus de simplicité constructive et plus de rigueur géométrique. Grâce au mobilier, aux objets et aux aménagements d’intérieurs qu’il crée et fait réaliser par la centaine d’ouvriers de ses ateliers liégeois, sa firme prend rapidement une ampleur internationale et se fait remarquer dans les expositions universelles comme celle de Saint-Louis (U.S.A.) en 1904. Anticipant sur ce que seront les motivations d’un Bauhaus, ses préoccupations sociales et esthétiques conduisent Serrurier à imaginer un mobilier de plus en plus économique, rationnellement construit, adapté à l’usage et au lieu de destination, par exemple pour une habitation ouvrière à l’Exposition universelle de Liège en 1905. Là, un mobilier en orme équipe la salle commune égayée d’une frise au pochoir et de rideaux de lin garnis de carrés colorés. On y remarque un meuble à usage multiple, tout à la fois armoire, secrétaire et bibliothèque, sans autre décor que sa composition équilibrée ; banc, table et chaises sont faits d’éléments assemblés par des vis apparentes. C’est à cette même époque que Serrurier développe la ligne “Silex”, particulièrement représentative ; conçue de façon tout à fait originale et pragmatique, exécutée en bois blanc et décorée au pochoir, la plupart des assemblages de menuiserie sont remplacés par des vis apparentes. La découpe des planches se montre économe en matière. Une chaise, objet d’utilité commune, se doit d’être robuste, ergonomique et peu coûteuse à produire : ici, la production en série est aisée et pourra être assurée dans ses ateliers équipés de scies mécaniques et autres machines-outils. A l’examen, une chaise de cette série exprime bien les qualités de designer industriel de son concepteur et le place à l’avant-garde de son temps ; elle illustre aussi ses ambitions, tant sociales qu’esthétiques, et sa volonté d’un « art pour tous ». [less ▲]

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See detailGustave Serrurier-Bovy : un architecte à l’aube de la modernité
Folville, Xavier ULg

in Art nouveau et écologie : Mélanges (2015, November 01)

Abstract A l'extrême fin du 19e siècle, l'Art nouveau s’épanouit sous des formes diversifiées, parfois contradictoires, mais partageant généralement la même volonté de rompre avec l'académisme et l ... [more ▼]

Abstract A l'extrême fin du 19e siècle, l'Art nouveau s’épanouit sous des formes diversifiées, parfois contradictoires, mais partageant généralement la même volonté de rompre avec l'académisme et l'historicisme du siècle finissant. Parmi les acteurs de cet Art nouveau, certains ne retiennent que le côté décoratif d’une nouvelle esthétique. Très tôt cependant, au cœur même de ce mouvement d’avant-garde, apparaissent les prémices du renouvellement qui le condamnera et conduira au Modernisme. Quelques travaux de Gustave Serrurier – mobilier ou architecture – méritent d’être observés sous cet angle. [less ▲]

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See detailPièges à considérer lors de l’évaluation isocinétique
Croisier, Jean-Louis ULg; Kaux, Jean-François ULg; Crielaard, Jean-Michel ULg et al

in Abstract book des XVIIèmes RENCONTRES ISOCINETIQUES DE MEDIMEX (2015, November)

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See detailImpact of model reduction on the dynamic simulation of a micro-scale concentrated solar power system integrated with a thermal storage
Dickes, Rémi ULg; Wéber, Noé ULg; Lemort, Vincent ULg et al

in Proceedings of the ISES Solar World Congress 2015 (2015, November)

Because of the intermittent nature of solar irradiances, micro-scale solar thermal power systems almost never operate in nominal operating conditions. They are characterized by strong transients and ... [more ▼]

Because of the intermittent nature of solar irradiances, micro-scale solar thermal power systems almost never operate in nominal operating conditions. They are characterized by strong transients and require robust, fast and accurate dynamic simulation tools to permit a proper evaluation of their performance. Model reduction, i.e. the simplification of detailed models, is an attractive method to improve the computational efficiency while simulating such systems. In this context, a µCSP plant featuring a solar field of parabolic troughs, a thermocline storage and a 5kWe power unit is investigated. Both the solar field and the thermocline storage are modeled with complex and simplified methods. The whole power plant is simulated under identical operating condition and deviations between the simulation results are analyzed. Benefits and limitations of the current modeling approach are assessed. Improvements for the modeling of the thermocline storage are identified, implemented and validated. The Modelica language is used as simulation tool and the models developed in this work are integrated in the open-source ThermoCycle library. [less ▲]

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See detailEvaluation isocinétique et fonctionnelle de la rupture de coiffe des rotateurs non opérée
Forthomme, Bénédicte ULg; Schwartz, Cédric ULg; MAHIEU, Xavier ULg et al

in Abstract book des XVIIèmes RENCONTRES ISOCINETIQUES DE MEDIMEX (2015, November)

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See detailERT monitoring of water infiltration process through a landfill cover layer
Dumont, Gaël ULg; Pilawski, Tamara ULg; Robert, Tanguy et al

in Berichte der Geologischen Bundesanstalt, 112 (2015, November)

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See detailEtude technique et dendrochronologique de la roue découverte dans le puits du château fort de logne
Hoffsummer, Patrick ULg; Delye, Emmanuel ULg; Wéry, Benoit

in Frébutte, Christian (Ed.) Pré-actes des Journées d'Archéologie en Wallonie (2015, November)

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See detailImproving the Installation of Offshore Wind Farms by the use of Discrete Event Simulation
Muhabie, Yohannes Tekle ULg; Caprace, Jean-David ULg; Petcu, Cristian ULg et al

in Improving the Installation of Offshore Wind Farms by the use of Discrete Event Simulation (2015, November)

The offshore wind energy development is highly affected by the condition of the weather at sea. Hence, it demands a well-organized planning of the overall process starting from the producers’ sites until ... [more ▼]

The offshore wind energy development is highly affected by the condition of the weather at sea. Hence, it demands a well-organized planning of the overall process starting from the producers’ sites until the offshore site where the turbines will finally be installed. The planning phase can be supported with the help of Discrete Event Simulation (DES) where weather restrictions, distance matrix, vessel characteristics and assembly scenarios are taken into account. The purpose of this paper is to simulate the overall transport, assembly and installation of the wind turbine components at sea. The analysis is carried out through DES considering both the real historical weather data (wind speed and wave height) and probabilistic approach. Results of the study, applied to the real Offshore Wind Farm (OWF) configuration, are showing a good agreement between the two proposed models. The results point out that the probabilistic approach is highly affected by the semi-random numbers used to model the stochastic behavior of the input variable so that several iterations (200 to 400) are required to reach the convergence of the simulation outputs. We suggest that seasonality of the outputs of both models are preserved, i.e. the variation of the results depending on the variation of the weather along the year. These findings provide a new framework to address risks and uncertainties in OWF installations. [less ▲]

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