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See detailINFLUENCE OF LOCAL BUCKLING ON THE SHEAR RESISTANCE OF BOLTED CONNECTIONS FOR TUBULAR RACKING STRUCTURES
D'Antimo, Marina ULg; Demonceau, Jean-François ULg; Jaspart, Jean-Pierre ULg et al

in THE INTERNATIONAL COLLOQUIUM ON STABILITY AND DUCTILITY OF STEEL STRUCTURES, Timisoara 30 May-01 June 2016 (2016, May)

The competition in the field of storage racking structures is so that companies are always look-ing for new structural solutions aiming at containing construction time and expenses. This pa-per focuses ... [more ▼]

The competition in the field of storage racking structures is so that companies are always look-ing for new structural solutions aiming at containing construction time and expenses. This pa-per focuses the bearing failure of shear joint using long bolts through thin tubular members with the purpose to check the reliability of Eurocode 3 formulation. The used hollow sections are free to buckle inward leading to a bearing resistance lower than the one predicted using EC3. In fact EC3 does not account for the possible occurrence of out-of-plane deformations in shear connection assuming that the connected plates are restrained by the bolt head and the nut. In order to investigate this phenomenon, an experimental campaign has been developed, a FE model Abaqus/CAE has been validated and a parametric study has been performed. The present paper introduces the conducted investigations. [less ▲]

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See detailANALYTICAL PREDICTION OF THE BEARING RESISTANCE OF BOLTED CONNECTIONS FOR TUBULAR RACKING STRUCTURES
Armenante, Vittorio; D'Antimo, Marina ULg; Demonceau, Jean-François ULg et al

in THE INTERNATIONAL COLLOQUIUM ON STABILITY AND DUCTILITY OF STEEL STRUCTURES, Timisoara 30 May-01 June 2016 (2016, May)

The aim of this paper is to provide a formulation able to predict the resistance of simple shear connections realized by fastening a plate to a hollow square section by means of long bolts. The research ... [more ▼]

The aim of this paper is to provide a formulation able to predict the resistance of simple shear connections realized by fastening a plate to a hollow square section by means of long bolts. The research is motivated by the fact that the rules currently provided by EC3 for defining the bearing resistance of steel connections are limited to the case of stacks of plates, where every plate composing the connection is always restrained out of plane by the adjoining plate or by the bolt head or nut. This is a condition not verified in case of connections realized with long bolts fastening hollow sections. The work is organized in two sections. First, the results of an experimental campaign are presented and successively, the results of a parametric analysis carried out by means of a Finite Element model calibrated on the experimental data are reported. Afterwards, an analytical approach able to include the local buckling effects arising in these kinds of connections is presented, proposing a coefficient for the reduction of the resistance, to be included in the EC3 formulation. [less ▲]

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See detailLe droit du travail (re)visité par la Cour constitutionnelle
Kéfer, Fabienne ULg

in Boufflette, Sophie (Ed.) La cour constitutionnelle. De l'art de modeler de droit pour préserver l'égalité (2016, April 29)

L'étude porte sur le rôle de la Cour constitutionnelle dans l’édification du droit du travail. Arrêt après arrêt, elle consolide la norme attaquée ou au contraire redessine – ou presse le législateur de ... [more ▼]

L'étude porte sur le rôle de la Cour constitutionnelle dans l’édification du droit du travail. Arrêt après arrêt, elle consolide la norme attaquée ou au contraire redessine – ou presse le législateur de redessiner – les contours de cette branche du droit fortement marquée par son histoire. Elle se penche sur un peu plus de trente arrêts prononcés par la Cour constitutionnelle, principalement depuis 2008, dans les domaines suivants : le travail à temps partiel (chapitre 1), le droit de la non-discrimination (chapitre 2), certaines questions intéressant le licenciement, à savoir la durée du préavis, les mesures destinées à stimuler l’employabilité, la motivation, la notion de rémunération en cours en cas de réduction temporaire des prestations de travail, et l’indemnité d’éviction du représentant de commerce (chapitres 3 à 7), les distinctions entre employés et ouvriers autres que les conditions de licenciement (chapitre 8), la procédure de réorganisation judiciaire (chapitre 9) et la prescription (chapitre 10). [less ▲]

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See detailPrêt "coup de pouce": un nouvel incitant fiscal wallon pour le financement des entreprises débutantes
Bourgeois, Marc ULg; Pace, Xavier ULg

in Bourgeois, Marc (Ed.) Les incitants fiscaux pour les PME - actualités et aspects comptables (2016, April 28)

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See detailA Raster SOLAP for the Visualization of Crime Data Fields
Kasprzyk, Jean-Paul ULg; Donnay, Jean-Paul ULg

in Rückemann, Claus-Peter (Ed.) GEOProcessing 2016 (2016, April 19)

In order to effectively extract synthetic information from large spatial data sets, Spatial OnLine Analytical Processing (SOLAP) combines Geographic Information Systems (GIS) with Business Intelligence ... [more ▼]

In order to effectively extract synthetic information from large spatial data sets, Spatial OnLine Analytical Processing (SOLAP) combines Geographic Information Systems (GIS) with Business Intelligence (BI) to query data warehouses through interactive vector maps. On the other hand, crime strategical analysis is usually based on raster maps computed by Kernel Density Estimation (KDE), then independent of any artificial boundary. This paper introduces an alternative vision of SOLAP which uses the raster model (instead of the vector one) in order to integrate crime data fields computed by KDE. It allows a continuous visualization of spatial data which, until now, has not been compatible with other SOLAP tools. The original geo-model is validated by a prototype adapted to the police needs. [less ▲]

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See detailA Study Of Dry Stiction Phenomenon In MEMS Using A Computational Stochastic Multi-scale Methodology
Hoang Truong, Vinh ULg; Wu, Ling ULg; Paquay, Stéphane et al

in EuroSimE 2016 in Montpellier (2016, April 19)

This work studies the uncertainties of the adhesive contact problems for reduced size structures, e.g. the stiction failure of microelectromechanical systems (MEMS). In MEMS, because of the large surface ... [more ▼]

This work studies the uncertainties of the adhesive contact problems for reduced size structures, e.g. the stiction failure of microelectromechanical systems (MEMS). In MEMS, because of the large surface to volume ratio, the surfaces forces, such as van der Waals forces and capillary forces, are dominant in comparison with the body forces. As these force magnitudes strongly depend on the contact distance, when the two contacting surfaces are rough, the contact distances vary, and the physical contact areas are limited at the highest asperities of the contacting surfaces. Therefore, the adhesive contact forces between two rough surfaces can suffer from a scatter, and the involved structural behaviors can be indeterministic. To numerically predict the probability behaviors of structures involving adhesion in dry environments, in this paper, a computational stochastic model-based multi-scale method developed by the authors is applied. The effects of van der Waals is studied and compared with experimental data as well as with the effects of capillary forces. [less ▲]

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See detailObésité : outils et approches nutritionnelles pour obtenir un (minimum de) succès.
Diez, Marianne ULg

in Proceedings of the SCIVAC National Congress (2016, April 08)

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See detailImproved Thévenin equivalent methods for real-time voltage stability assessment
Perez, Angel; Johannsson, Hjortur; Ostergaard, Jacob et al

in proc. IEEE ENERGYCON Conference (2016, April)

An improved Thévenin equivalent method for real-time voltage stability assessment that uses wide-area information from synchrophasors is proposed. The improvements are a better modeling of the limited ... [more ▼]

An improved Thévenin equivalent method for real-time voltage stability assessment that uses wide-area information from synchrophasors is proposed. The improvements are a better modeling of the limited synchronous generators, and a processing that anticipates the effect of field current limiters, before the latter are activated. Several study cases using detailed dynamic simulations of the Nordic test system have been used to assess the performance of the proposed improvements. Their effectiveness is analyzed and, based on the results, their possible application in combination with the sensitivity-based voltage stability assessment method is explored. [less ▲]

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See detailThe Fractal Nature of Mars Topography Analyzed via the Wavelet Leaders Method
Kleyntssens, Thomas ULg; Deliège, Adrien ULg; Nicolay, Samuel ULg

in Information Technology: New Generations (2016, April)

This paper studies the scaling properties of Mars topography based on Mars Orbiter Laser Altimeter (MOLA) data through the wavelet leaders method (WLM). This approach shows a scale break at 15 km. At ... [more ▼]

This paper studies the scaling properties of Mars topography based on Mars Orbiter Laser Altimeter (MOLA) data through the wavelet leaders method (WLM). This approach shows a scale break at 15 km. At small scales, these topographic profiles display a monofractal behavior while a multifractal nature is observed at large scales. The scaling exponents are greater at small scales. They also seem to be influenced by latitude and may indicate a slight anisotropy in topography. [less ▲]

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See detailA New Wavelet-Based Mode Decomposition for Oscillating Signals and Comparison with the Empirical Mode Decomposition
Deliège, Adrien ULg; Nicolay, Samuel ULg

in Information Technology: New Generations (2016, April)

We introduce a new method based on wavelets (EWMD) for decomposing a signal into quasi-periodic oscillating components with smooth time-varying amplitudes. This method is inspired by both the “classic” ... [more ▼]

We introduce a new method based on wavelets (EWMD) for decomposing a signal into quasi-periodic oscillating components with smooth time-varying amplitudes. This method is inspired by both the “classic” wavelet-based decomposition and the empirical mode decomposition (EMD). We compare the reconstruction skills and the period detection ability of the method with the well-established EMD on toys examples and the ENSO climate index. It appears that the EWMD accurately decomposes and reconstructs a given signal (with the same efficiency as the EMD), it is better at detecting prescribed periods and is less sensitive to noise. This work provides the first version of the EWMD. Even though there is still room for improvement, it turns out that preliminary results are highly promising. [less ▲]

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See detailUnveiling the MPLS Structure on Internet Topology
Davila Revelo; Anderson Ricci, Mauricio; Donnet, Benoît ULg et al

in 8th International Workshop on Traffic Monitoring and Analysis (TMA) (2016, April)

Recently, researches have been conducted to discover and assess the usage of MPLS tunnels. Indeed, recent developments in the ICMP protocol make certain categories of MPLS tunnels transparent to ... [more ▼]

Recently, researches have been conducted to discover and assess the usage of MPLS tunnels. Indeed, recent developments in the ICMP protocol make certain categories of MPLS tunnels transparent to traceroute probing. Additional techniques have been proposed to reveal the presence of MPLS tunnels when they do not explicitly appear in traceroute. It has been shown that MPLS is a very well deployed technology whose usage (i.e., Traffic Engineering, load balancing, etc.) varies in time and according to ASes. However, the MPLS structure on the Internet architecture has not been studied yet. In this paper, we follow this path by providing two contributions to the state of the art: (i) we evaluate the biases involved on MPLS tunnel detection when they are not directly revealed through traceroute. (ii), we provide some properties and architectural details related with MPLS deployment on router topology based on a k-core decomposition. [less ▲]

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See detailReview on the applications of directional impulse responses in room acoustics
Embrechts, Jean-Jacques ULg

in Actes du CFA 2016 (2016, April)

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See detailDesign optimization of large-size format edge-lit light guide units
Hastanin, Juriy ULg; Lenaerts, Cedric ULg; Fleury-Frenette, Karl ULg

in Proceedings of SPIE; SPIE 2016 Photonics Europe (2016, April)

In this paper, we present an original method of dot-pattern generation dedicated to design optimization of large-size format ELBUs (Edge-Lit Light Guide Unit), where the number of dots greatly exceeds the ... [more ▼]

In this paper, we present an original method of dot-pattern generation dedicated to design optimization of large-size format ELBUs (Edge-Lit Light Guide Unit), where the number of dots greatly exceeds the maximum allowable number of optical objects supported by most common ray-tracing software. In the proposed method, in order to simplify the computational problem, an original optical system is replaced by an equivalent one. Accordingly, the original dot pattern is splitted into multiple small sections. Then, these sections are replaced by equivalent cells with continuous diffusing film. After that, we adjust the TIS (Total Integrated Scatter) two-dimensional distribution over the grid of equivalent cells, using an iterative optimization procedure. Finally, the obtained optimal TIS distribution is converted into the dot size distribution by applying an appropriate conversion rule. An original semi-empirical equation dedicated to rectangular large-size LGPs (Light Guide Plate) is proposed for the initial guess of the TIS distribution. It allows significantly reducing the time needed to dot pattern optimization. [less ▲]

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See detailAntibiotherapy in pet rodents and rabbits: a preliminary analysis of practitioners’ habits
Marlier, Didier ULg

in Proceedings of the European College of Zoological Medicine Symposium (2016, April)

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See detailTreeNET: Discovering and Connecting Subnets
Grailet, Jean-François ULg; Tarissan, Fabien; Donnet, Benoît ULg

in 8th International Workshop on Traffic Monitoring and Analysis (TMA) (2016, April)

Since the early 2000's, the Internet topology has been an attractive and important research topic, either for developing data collection mechanisms, and for analyzing and modeling the network. Beside ... [more ▼]

Since the early 2000's, the Internet topology has been an attractive and important research topic, either for developing data collection mechanisms, and for analyzing and modeling the network. Beside traditional aspects of the Internet topology (i.e., IP interface, router, and AS levels), recent researches focused on intermediate promising visions of the topology, namely Point-of-Presence (PoP) and subnets (i.e., a set of devices that are located on the same connection medium and that can communicate directly with each other at the link layer). This paper focuses on network subnet discovery by proposing a new tool called treenet. One of the key aspects of treenet is that it builds a tree representing the way subnets are located with respect to each other. This tree allows treenet to obtain additional information on the network, leading to better analysis of the collected data. In this paper, we demonstrate the potential of treenet through the evaluation of its key algorithmic steps and the study of measurements collected from the PlanetLab testbed. [less ▲]

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See detailWhen the same hydraulics conditions lead to different depositional patterns: case of an idealised delta
Peltier, Yann; Erpicum, Sébastien ULg; Archambeau, Pierre ULg et al

in Geophysical Research Abstracts (2016, April)

Deltas are complex hydrosystems and ecosystems resulting from the interactions of a river system with a water body almost at rest. Anthropogenic factors (hydropower, flood management, development in the ... [more ▼]

Deltas are complex hydrosystems and ecosystems resulting from the interactions of a river system with a water body almost at rest. Anthropogenic factors (hydropower, flood management, development in the floodplains) lead to dramatic changes in sediment transport in the rivers and in sediment management practice. From continuous, the sediment transport becomes increasingly intermittent, with long periods of deficit in the sediment supply and short periods characterized by large supplies. Understanding how these intermittencies in the sediment supply affect the delta morphodynamics is of paramount importance for predicting the possible evolution and functioning of deltas. Deltas can reasonably be idealised as a reservoir, with an inlet channel representing the river and the sud- den enlargement of the reservoir representing the water body at rest. Using such an ideal configuration enables the assessment of the influence of individual geometric and hydraulic parameters on the depositional patterns responsible for the morphodynamic evolution of the delta. Recent literature has shown that for very similar hydraulic boundary conditions, two very different types of flow fields may develop (“straight jet” vs. “meandering jet”), leading to totally different depositional patterns. In turn, these distinct depositional patterns affect the flow itself through a two-way coupling between the hydrodynamics and the morphodynamics of the deposits. These complex processes will be discussed in the proposed presentation, based on the results of over 160 experimental tests and corresponding numerical simulations. [less ▲]

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See detailA Refined Method for Estimating the Global Hölder Exponent
Nicolay, Samuel ULg; Kreit, Damien

in Latifi, Shahram (Ed.) Information Technology: New Generations (2016, April)

In this paper, we recall basic results we have obtained about generalized Hölder spaces and present a wavelet characterization that holds under more general hypothesis than previously stated. This ... [more ▼]

In this paper, we recall basic results we have obtained about generalized Hölder spaces and present a wavelet characterization that holds under more general hypothesis than previously stated. This theoretical tool gives rise to a method for estimating the global Hölder exponent which seems to be more precise than other wavelet-based approaches. This work should prove helpful for estimating long range correlations. [less ▲]

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See detailCompact handheld low-cost biosensor platform for remote health monitoring
Hastanin, Juriy ULg; Lenaerts, Cedric ULg; Gailly, Patrick ULg et al

in Proceedings of SPIE; SPIE 2016 Photonics Europe (2016, April)

In this paper, we present an original concept of plasmonic-related instrumentation platform dedicated to diagnostic biosensing tests out of the laboratory. The developed instrumental platform includes ... [more ▼]

In this paper, we present an original concept of plasmonic-related instrumentation platform dedicated to diagnostic biosensing tests out of the laboratory. The developed instrumental platform includes both disposable one-use microfluidic affinity biochip and compact optical readout device for biochip monitoring involving mobile Internet devices for data processing and communication. The biochip includes both microfluidic and optical coupling structures formed into a single plastic slab. The microfluidic path of the biochip operates in passive capillary pumping mode. In the proof-of-concept prototype, we address specifically the sensing format involving Surface Plasmon Resonance phenomenon. The biochip is plugged in the readout device without the use of an index matching fluid. An essential advantage of the developed biochip is that its implementation involves conventional hot embossing and thin film deposition process, perfectly suited for mass production of low-cost microfluidic biochip for biochemical applications. [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, April)

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 detailIdentification of nonlinear frequency responses and bifurcations from experimental data
Noël, Jean-Philippe ULg; Gourc, Etienne ULg; Grappasonni, Chiara ULg et al

in Actes de CFA/VISHNO 2016 (2016, April)

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 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 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 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 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 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 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 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 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 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 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 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 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 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 detailThe materials lifecycle : A steering wheel for Europe's Raw Materials Academy.
Pirard, Eric ULg; Greberg, Jenny

in TMS 2016 Supplemental Proceedings (2016, February)

EIT Raw Materials is a major European initiative supported by more than 120 core and associate partners from industry, research and academia. Among the core missions of this network is the establishment ... [more ▼]

EIT Raw Materials is a major European initiative supported by more than 120 core and associate partners from industry, research and academia. Among the core missions of this network is the establishment of a Raw Materials RM Academy to educate T-shaped professionals that will contribute to the development of a sustainable and resource efficient Europe. Every T-shaped professional should combine an in depth knowledge of his own discipline with a sound understanding of the challenges of the full raw materials value chain and with a mindset for innovation and entrepreneurship. The main objective of the RM Academy is to connect all T-shaped professionals to help create the circular economy steering wheel. Therefore, the RM Academy has the following missions: - Label and support educational programs. - Promote a permanent offer of cross-disciplinary programmes, workshops and courses. - Train T-shaped professionals into T-shaped entrepreneurs. - Promote lifelong learning initiatives. - Stimulate wider society learning initiatives aiming at raising social and political awareness. - Closely collaborate with industry - Enable a high degree of mobility of students and professionals [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 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 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 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 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 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 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 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 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 detailReduced span spray: Part 3: Design of a narrow span nozzle
De Cock, Nicolas ULg; Massinon, Mathieu ULg; Ouled Taleb Salah, Sofiene ULg et al

in Aspect of Applied Biology (2016, January)

Optimisation of the droplet spectra of the agricultural spray may increase the spray application efficiency. The optimal spray would contain only the most efficient droplets in term of speed and size ... [more ▼]

Optimisation of the droplet spectra of the agricultural spray may increase the spray application efficiency. The optimal spray would contain only the most efficient droplets in term of speed and size. Therefore, this paper is presenting the first steps of the design of a narrow span nozzle in order to produce an optimised spray. The starting geometry is a splash plate nozzle with a disk ending with structures (i.e. tooth, grooves, and needles) that would separate the liquid sheet into jets. These jets would be in the Rayleigh regime which has the advantage of producing narrower droplet spectra than liquid sheet break-up. The present project aims to design a hydraulic nozzle producing a spray with a narrow drop size distribution in order to increase the agricultural spray application efficiency. In the present paper the first project steps are presented. [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 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 detailExperimental nonlinear identification of an aircraft with bolted connections
De Filippis, Giovanni; Noël, Jean-Philippe ULg; Kerschen, Gaëtan ULg et al

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

Aircraft structures are known to be prone to nonlinear phenomena, especially as they constantly become lighter and hence more flexible. One specific challenge that is regularly encountered is the modeling ... [more ▼]

Aircraft structures are known to be prone to nonlinear phenomena, especially as they constantly become lighter and hence more flexible. One specific challenge that is regularly encountered is the modeling of the mounting interfaces between aircraft subcomponents. Indeed, for large amplitudes of vibration, such interfaces may loosen and, in turn, trigger complex mechanisms such as friction and clearances. In this context, the present work intends to investigate the nonlinear dynamics of the Morane–Saulnier Paris aircraft, accessible at ONERA. This aircraft possesses multiple bolted connections between two external fuel tanks and wing tips. The objective of the paper is specifically to carry out an adequate identification of the numerous nonlinearities affecting the dynamics of this full-scale structure. Nonlinearity detection and the subsequent subspace-based parameter estimation have been performed on experimental data, collected during an on-ground test campaign. Nonlinearity detection is first achieved by the comparison of frequency response functions estimated at low excitation level, with those obtained at high amplitude level, yielding insight towards accurately characterizing the behavior of the bolted connections. Then, a nonlinear subspace identification method is applied to measured data to estimate the linear and nonlinear parameters of the structure and novel strategies and tools that overcome specific arisen problems are developed. [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 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 detailReduced span spray – Part 1: Retention
Massinon, Mathieu ULg; De Cock, Nicolas ULg; Ouled Taleb Salah, Sofiene ULg et al

in Aspect of Applied Biology, International Advances in Pesticide Application (2016, January)

Maximising treatment efficiency for a given target lies mainly on depositing a maximum part of the spray volume within an optimal droplet size range, which has to be as narrow as possible to reduce ... [more ▼]

Maximising treatment efficiency for a given target lies mainly on depositing a maximum part of the spray volume within an optimal droplet size range, which has to be as narrow as possible to reduce retention variability and drift issues. The present work focuses on exploring the effect of span factor of the droplet size distribution on the final retention by a 3D target plant using a modelling approach with the final aim of guiding the development of a reduced span nozzle (Reduced span spray – Part 3: Design of narrow span nozzle). Five droplet size spans have been tested for three VMD and three wetting scenarios on the same 3D plant architecture. Performing a screening of the different parameters involved in spray retention with a modelling approach based on a deeper understanding of leaf/droplet interactions is a valuable approach for highlighting the optimal droplet size distribution maximising droplet retention for a given target/formulation combination. [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 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 detailGenetic pituitary tumors - clinical
Beckers, Albert ULg

in 15th International Workshop on Multiple Endocrine Neoplasia and other rare endocrine tumors - Abstract book (2016)

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See detailÉvaluation des réparations en béton et identification des principaux facteurs d’influence
Bissonnette, Benoît; Courard, Luc ULg; Garbacz, Andrzej et al

in Courard, Luc; Collin, Frédéric; Cerfontaine, Benjamin (Eds.) RUGC 2016 (2016)

La réparation et le renforcement des structures existantes en béton comptent parmi les plus importants défis auxquels les ingénieurs civils sont confrontés aujourd’hui et qu’ils devront relever dans les ... [more ▼]

La réparation et le renforcement des structures existantes en béton comptent parmi les plus importants défis auxquels les ingénieurs civils sont confrontés aujourd’hui et qu’ils devront relever dans les années à venir. Les préoccupations actuelles concernant le développement durable favorisent la réfection au détriment de la construction neuve et ne peuvent que renforcer cette tendance. Des efforts concertés de la part des scientifiques et ingénieurs sont encore nécessaires afin d’améliorer la conception des réparations en béton et d’en assurer la qualité et la fiabilité attendues. L’un des aspects essentiels de la durabilité des réparations en béton et des revêtements ou traitements de surface est la qualité de l’adhérence entre le matériau de réparation et le béton existant. Le présent article résume les principales conclusions de travaux réalisés en collaboration en vue d’identifier les facteurs influençant l’adhérence des réparations (la rugosité, le degré de saturation et la carbonatation du substrat) et l’évaluation de celle-ci en conditions in situ (type de chargement, alignement de l’appareil). Sur la base des résultats recueillis, des recommandations ont été émises dans un guide du USBR [less ▲]

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See detailLes remèdes d'origine égyptienne utilisés dans la médecine vétérinaire antique
Marganne, Marie-Hélène ULg

in Gitton-Ripoll, Valérie (Ed.) La trousse du vétérinaire dans l'Antiquité et au Moyen Âge. Instruments et pratiques. Actes du IVe colloque international de médecine vétérinaire antique et médiévale (Lyon, 10-12 juin 2014) (2016)

Famous since the Odyssey (IV, 229-230) for its drugs, Egypt furnishes the Greek world with some medical substances already mentioned in the hippocratic treatises. Moreover, many Greek drug names have been ... [more ▼]

Famous since the Odyssey (IV, 229-230) for its drugs, Egypt furnishes the Greek world with some medical substances already mentioned in the hippocratic treatises. Moreover, many Greek drug names have been loaned from the Egyptian language, such as ἄμ(μ)ι for cumin, κίκι for castor-oil, κόμμι for gum, κῦφι for a complex preparation used for fumigation in cult practices, νίτρον for sodium carbonate, στίμμι for galena, σῶρυ for ferrous sulfate, and σάμψ(ο)υχον, for marjoram, whose name means “herb (sem) of Soukhos", another name for the crocodile god Sobek. The trade of drugs, spices and colourants, used in pharmacology, cosmetology, painting, cultual and magical practices, embalming rites and nutrition always flourished in Egypt and has intensified in Hellenistic and Roman times. As a continuation of the research on remedies of Egyptian origin in Greco-Roman pharmacopoeia, this article provides a list of Egyptian ingredients used in Greek and Latin veterinary prescriptions. The use of these substances is compared with recomandations from human medicine. Their availability and costs are also studied. [less ▲]

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See detailIntegrating Social Aspect into Sustainability Assessment of Bio-Based Industries: Towards a Systemic Approach
Rafiaani, P.; Van Passel, S.; Lebailly, Philippe ULg et al

in Ban, Marko et al. (Ed.) 11th Conference on Sustainable Development of Energy, Water and Environment Systems : book of abstracts (2016)

Biobased industries require to be assessed on their positive and negative impacts on sustainable development. However, social factors are usually neglected in the majority of impact assessments of ... [more ▼]

Biobased industries require to be assessed on their positive and negative impacts on sustainable development. However, social factors are usually neglected in the majority of impact assessments of biobased industries: they are mainly focused on environmental performance and (techno)- economic assessments. This review proposes a new systemic approach for assessing and integrating the social dimension into sustainability assessments of biobased industries. First the main methodologies for assessing social impacts in biobased industries are compared. Social Life Cycle Analysis (SLCA) is considered to have promising methodological attributes for biobased industries’ social sustainability assessment, although it is still in its early steps of development. Second, a new systemic framework was developed following the four main iterative steps of an SLCA framework and based on three useful SLCA-based approaches including Product Social Impact Assessment; Prosuite and the UNEP SETAC Guidelines for SLCA of Products. The proposed framework allows incorporating the social impacts into a techno economic assessments (TEA) model through providing both a final social score and separate scores for each indicator category and life cycle phase. The result of this study particularly highlights the importance of considering social issues in biobased industries’design and innovation. Using the proposed systemic approach, industry and policy makers gain a better insight into the full sustainability performance (i.e. including social aspects) of biobased industries. [less ▲]

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See detailAntiquité tardive et christianisme africains dans l'Africa romana : un bilan historiographique
Fialon, Sabine ULg

in Ruggeri, Paola (Ed.) L’Africa romana XX. Momenti di continuita e rottura : bilancio di 30 anni di convegni de l’Africa romana (2016)

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See detailTowards an “integrated conservation” : the contribution of R.M. Lemaire and Piero Gazzola during the first decade of ICOMOS (1965-1975)
Houbart, Claudine ULg

in Szmygin, Bogusław (Ed.) 'HERITAGE IN TRANSFORMATION. HERITAGE PROTECTION IN THE 21ST CENTURY - PROBLEMS, CHALLENGES, PREDICTIONS' (2016)

Respectively elected first President and first Secretary General during the first general assembly of ICOMOS in Cracow in 1965, Piero Gazzola and Raymond M. Lemaire have deeply contributed to the success ... [more ▼]

Respectively elected first President and first Secretary General during the first general assembly of ICOMOS in Cracow in 1965, Piero Gazzola and Raymond M. Lemaire have deeply contributed to the success of the newly born organisation. During the first years, they didn’t only provoke the creation of numerous national committees around the world, but they also positioned ICOMOS as a major actor of the international conservation scene, through the organisation of conferences and an active participation in the debates initiated by Unesco and the Council of Europe, for which ICOMOS acted as a consultant. The study of Raymond M. Lemaire’s archive, kept at the KU Leuven in Belgium, clearly shows that one of the major concerns of both Lemaire and Gazzola, who had been, in 1964, amongst the main authors of the Venice Charter, was to broaden the scope of the document in order to address the issue of pre-industrial city centres, threatened by late reconstruction or development projects mostly promoting functionalist approaches. Depending on the time available, this presentation will address one or various aspects of Lemaire’s and Gazzola’s contribution to the emergence of integrated conservation, consecrated by the European Charter and the Amsterdam Declaration of 1975, that is: the new ideas (social value of heritage for example) developed during the expert meetings organised by the Council of Europe in 1965-1968, where they both represented ICOMOS. These ideas are synthesised in the report “Saving the face of Europe” in 1973, the relation between these theoretical contributions and Lemaire and Gazzola’s contemporary field experience, the role of Eastern Europe experiences (D. Libal in Prague and M. Horler in Budapest) in the development of an appropriate methodology to address urban issues, the differences between the concept of “integral planning” proposed by Lemaire in 1973 and the “integrated conservation” that was promoted by the 1975 Council of Europe charters, an epilogue could mention the revision projects of the Venice Charter between 1975 and 1981. Based on my PhD about R.M. Lemaire, recently presented at the KU Leuven (Belgium), this presentation aims at clarifying and illustrating the shift from monument restoration towards city “reanimation” or “rehabilitation” during the late sixties and seventies, as well as paying tribute to the action of two of the most important figures of the beginnings of ICOMOS. [less ▲]

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See detailHabits des blogues, habits des blogueurs
Vintila, Elena-Georgiana ULg

in Parpală, Emilia (Ed.) Reprezentări ale identității în spațiul literar, lingvistic și cultural (2016)

More and more teachers of FLE choose to create a blog, to help their own students or by providing a database for other learners. The blog puts the teacher in a creative position - he must choose the ... [more ▼]

More and more teachers of FLE choose to create a blog, to help their own students or by providing a database for other learners. The blog puts the teacher in a creative position - he must choose the colors of each section, the size of the written form, the images that accompany the text, etc. Specific sections of the blog, - one usually titled Who am I? – leave to the professor / blogger the opportunity to present themselves and even to insert a picture of him. He becomes a graphic artist, a designer and organizer of the visual staging of the page. This grade is taken into account here - how teachers present themselves. They choose personal images or their preferences are moving towards the avatars? We chose 10 blogs of French teachers (5 men and 5 women) where bloggers use different forms of plural nature presentation to see how the clothes fit into the personal image of each one. [less ▲]

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See detailSocial Life Cycle Assessment in Biobased Industries: Identifying Main Indicators and Impacts
Rafiaani, Parisa; Van Passel, Steven; Lebailly, Philippe ULg et al

in Benoit Norris, Catherine; Norris, Gregory (Eds.) 5th International Social LCA Conference Harvard, Cambridge, USA, June 13 - 15, 2016: book of abstracts (2016)

Assessing social impacts of various products, services and human activities has achieved an increasing interest worldwide. The nature of sustainability of biobased industries from a social point of view ... [more ▼]

Assessing social impacts of various products, services and human activities has achieved an increasing interest worldwide. The nature of sustainability of biobased industries from a social point of view is how and to what extent they are perceived by society, and how various societies take advantages from such activities. However, an important issue is that social factors are not usually easy to be quantitatively analyzed and although the social impacts might be very remarkable, especially at the local scale, they have been not possible to be investigated in the majority of impact evaluations in the past. Despite the existence of many different methodologies towards Social Life Cycle Assessment (SLCA) to address social impacts of various businesses and industries, most of them impartially address social performances of an industry. The aim of this paper is to highlight the main criteria that need to be taken into account in SLCA approaches for identifying the social indicators and impacts of biobased industries that is a timely topic worldwide toward climate change mitigation goals. Accordingly, considering the general approach of SLCA and particularly its inventory analysis phase for impact categories and indicator determinations, the paper provides an overview of the existing guidelines and frameworks for identifying social indicators and impact categories associated with bio-industries. In conclusion, main impact categories and indicators formulated in the existing frameworks applied to biobased industries are demonstrated as a basic set of applicable elements of social dimensions in evaluating bio-industries’ sustainability when conducting SLCAs. The state of the art for this study mainly includes leading journal articles, international reports and conference papers up to and including 2016 on SLCA in biobased industries. According to the reviewed frameworks in this study, quantitative, midpoint and site-specific data are the main elements taken into account when collecting the data for biobased product social impact assessment. This study also reveals that although SLCA is in its early steps of development and despite in numerous cases, conducting a comprehensive SLCA is not yet feasible, it has been considered to have substantially promising methodological attributes that can help policymakers and other stakeholders to quantify and assess sustainability of bio-industries from the social perspective. Recommendations for further research work concerning SLCA in bio-industries are also presented. [less ▲]

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See detailLe logement du cheval: implications en termes de bien-être et d’éthique
Mikaeloff, Camille ULg; Vandenheede, Marc ULg; Vandenput, Sandrina ULg

in 42ème Journée de la Recherche Équine "Bien-être des équidés" (2016)

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See detailLe rôle des ecclésiastiques dans les armées françaises d’Italie à l’époque du Grand Schisme d’Occident (1382-1411)
Masson, Christophe ULg

in Jalabert, Laurent; Simiz, Stefano (Eds.) Le solat face au clerc. Armée et religion en Europe occidentale (XVe–XIXe siècles) (2016)

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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 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 detailResilience to environmental pressure through quality food demand. The case of Romania
Petrescu, Dacinia Crina; Petrescu-Mag, Ruxandra Malina; Burny, Philippe ULg

in Babes-Bolyai University (Ed.) 11th International Conference on "Environmental Legislation, Safety Engineering and Disaster Management": book of abstracts (2016)

The paper focuses on the Romanian consumer behavior and perceptions related to meat consumption, following that it is deeply embedded in the Romanian dietary food culture. The meat consumption is an ... [more ▼]

The paper focuses on the Romanian consumer behavior and perceptions related to meat consumption, following that it is deeply embedded in the Romanian dietary food culture. The meat consumption is an indicator of the population welfare degree and it is often used in assessing the food safety. The novelty lies in the investigation of meat consumption hindering factors, with a special emphasis on those related to the environmental protection. The main research objective was to evaluate the importance attached by consumers to meat products safety in order to develop resilience to environmental pressure through quality food production and consumption. Statistical analysis revealed the interest in meat free-off antibiotics, hormones and no genetically modified. From a pratical perspective, the results indicate directions that policy-making should follow to adapt the production sector to the market demands, along with promoting a more sustainable consumption pattern. [less ▲]

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See detailSolving the inverse dynamics of a flexible 3D robot for a trajectory tracking task
Lismonde, Arthur ULg; Sonneville, Valentin; Bruls, Olivier ULg

in Methods and Models in Automation and Robotics (MMAR), 2016 21th International Conference on (2016)

The end-effector trajectory tracking of robotic manipulators with flexible links requires advanced control concepts. In order to compute the feedforward component of the control scheme, the inverse ... [more ▼]

The end-effector trajectory tracking of robotic manipulators with flexible links requires advanced control concepts. In order to compute the feedforward component of the control scheme, the inverse dynamics of such flexible 3D multibody system is solved using an optimal control method. The robot is modeled using nonlinear finite elements formulated on the SE(3) group. Hence singularity and parameterization issues that can arise from 3D rotations are avoided. A numerical example of a 3D flexible arm is analyzed to demonstrate the capabilities of the method. [less ▲]

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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 detailFrom the spirit to the letter of the charters : mind the gap for the future
Houbart, Claudine ULg; Dawans, Stéphane ULg

in Szmygin, Bogusław (Ed.) 'HERITAGE IN TRANSFORMATION. HERITAGE PROTECTION IN THE 21ST CENTURY - PROBLEMS, CHALLENGES, PREDICTIONS' (2016)

Since the 1960’s and the foundation of ICOMOS, charters have been considered as a sort of conservation gospel. In this presentation, we would like to question this fact, in the light of the very ... [more ▼]

Since the 1960’s and the foundation of ICOMOS, charters have been considered as a sort of conservation gospel. In this presentation, we would like to question this fact, in the light of the very particular production and reception conditions of the documents. What may be perceived as a mostly provocative approach seems to us a constructive basis for future reflections. When we read and use charters – in this presentation, we will mainly focus on the Venice Charter, the Nara document and the Riga Charter – , we forget too often that they have been written by human beings, sometimes very tired, in a hurry, and even arguing with each other. The study of the archival material related to the writing of the Venice Charter and the Nara document very clearly illustrates that these documents are rather a conceptual “bricolage” than indisputable normative texts as if they had been written by lawyers. In the case of the Venice Charter, the archive as well as the records of Raymond M. Lemaire, Paul Philippot or Gertrud Tripp make clear that the document has been written at the last moment and adopted too rapidly by an assembly too glad to finally have a updated version of the Athens charter. As a consequence, only a few years later, Raymond Lemaire and Piero Gazzola already questioned the validity of the new text in the light of the extension of heritage debates to the city centers. On the other hand, the fact that a French and an English version of the Nara document were written in parallel by Raymond M. Lemaire and Herb Stovel in 1994 has had immediate consequences on the content and the formulation of the text, which logically left both of them unsatisfied with the result. Even so, the Venice charter and the Nara document still have force of law today. Yet, besides the particular circumstances of their writing, we must keep in mind that these texts answered specific questions, closely linked to the context: a critical answer to postwar reconstruction for the first, and apparently opposed visions of authenticity between East and West for the second. As far as the Riga charter is concerned, the influence of the delicate context of the Eastern bloc collapse is evident. For this reason, using such documents today requires at least a critical reading, going back to the spirit beyond the text. Our presentation will illustrate ad absurdum, through recent case studies, how a cynical reading of such documents can lead to interventions dangerously in conflict with this spirit and the fundamental ideals of conservation philosophy. In the era of late capitalism and heritage globalization, are we allowed to forget the conditions and the context in which our doctrinal documents have been written to justify anything and everything and to meet, for example, the “tourist gaze”, the “nouveaux riches” taste or the architect’s egomania? Do architects really want to know what the writers of the Venice charter’s article 9 meant by the “contemporary stamp”? What are the limits of the tolerance towards reconstruction first expressed by the Nara document, and a few years later, the charter of Riga? So many questions that ICOMOS must face if it wants to pursue its guiding mission in a mostly financial world. [less ▲]

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See detailPhysical modeling of an aerating stepped spillway
Erpicum, Sébastien ULg; Lodomez, Maurine ULg; Savatier, Jérémy et al

in Crookston, Brian; Tullis, Blake (Eds.) Hydraulic Structures and Water System Management (2016)

To mitigate the negative effects on the water quality in the downstream river of a projected large dam, and in particular to increase the dissolved oxygen concentration during low flow periods within the ... [more ▼]

To mitigate the negative effects on the water quality in the downstream river of a projected large dam, and in particular to increase the dissolved oxygen concentration during low flow periods within the first 10 years of dam operation, an aerating weir has been designed and tested on a physical model at the Laboratory of Engineering Hydraulics (HECE) of the Liege University. The design of the structure has been done considering data from the literature. The selected solution is a 3 m high stepped spillway designed to operate in nappe flow conditions within the range of design discharges (25 – 100 m³/s). To validate the design, a physical model representing a section of the weir at a 1:1 scale has been built and operated in the laboratory. Chemical dissolved oxygen removal technique has been applied upstream of the model to be able to measure the weir aerating efficiency. The physical model results show that the proposed structure is able to maintain, in the range of discharge in the river from 25 to 100 m³/s, a minimum 5 mg/l oxygen concentration downstream, whatever the upstream oxygen concentration. The paper presents the design process of the weir, the scale model features and the results of the validation tests on the physical model. The prototype construction will take place in 2017 and the water quality will be monitored. [less ▲]

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See detailÉvaluation des impacts économiques indirects selon un scénario de risque d’inondation
Saadi, Ismaïl ULg; El Saeid Mustafa, Ahmed Mohamed ULg; Teller, Jacques ULg et al

in Recueil des articles des 34èmes Rencontres Universitaires de Génie Civil de l'AUGC (2016)

In this paper, we propose an integrated framework to estimate the indirect economic impact due to flood risk in Belgium. By taking into account the land-use change and different scenarios of climate ... [more ▼]

In this paper, we propose an integrated framework to estimate the indirect economic impact due to flood risk in Belgium. By taking into account the land-use change and different scenarios of climate change, the economic impact can be estimated at the micro-scale level using an Input-Output (I-O) approach. I-O is an econometric model that represents the structure of an economy in the form of a Production-Consumption (P-C) matrix. From a physical point of view, it corresponds to commodity flows between different sectors classified according to the NACE code. This approach is implemented to describe and to better understand the propagation of higher order damage through the entire economic structure. This tool can be used to take strategic decisions in the case of transport and land-use policies within vulnerable areas. [less ▲]

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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 detailLes aspects financiers du contrat d'entreprise. Questions choisies
Kohl, Benoît ULg

in Kohl, Benoît (Ed.) Droit de la construction (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 detailLe Chèque Habitat en Région Wallonne: premier aperçu
Bourgeois, Marc ULg; Voisin, Fanny ULg

in Chroniques notariales. Volume 63 (2016)

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See detailComparative analysis of agricultural production systems performances: case of millet and sorghum in Mali
Sissoko, Penda ULg; Lebailly, Philippe ULg

in Kovacevic, Dusan (Ed.) VII International Scientific Agriculture Symposium “AGROSYM 2016”, Jahorina, October 06-09, 2016 : book of proceedings (2016)

This study was carried out to compare the performances of agricultural production systems based on millet and sorghum in Sahelian and sudano-Sahelian areas of Mali in 2014. The two systems compared were ... [more ▼]

This study was carried out to compare the performances of agricultural production systems based on millet and sorghum in Sahelian and sudano-Sahelian areas of Mali in 2014. The two systems compared were production techniques of micro-dosing fertilizer and traditional cropping called conventional cropping system of millet and sorghum. One hundred and eight farmers (108) were selected and interviewed in the two areas. The techniques of micro-dosing used were manual and mechanical fertilizers distribution. The tools used for analysis were descriptive statistics (frequency, average, standard deviation) and analytical method (ANOVA). The software’s used were EXCEL, SPSS 20 and STAGRAPHICS. The results of this survey show significant differences of mean at the plots levels. The production system based on fertilizer micro-dosing techniques is more efficient than traditional system of millet and sorghum through high yielding, lowing costs of fertilizers, diminution of farming operation work times and, high net profit at the plot level. The percent of yield obtained with manual technique is 41% and 52% with mechanical distribution (placement) for millet and respectively for sorghum 45% and 56%. The calculated cost ratio values (CRV>1) show that micro-dosing techniques are profitable for millet and sorghum production. [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 detailOrganic farming and the greening of the common Agricultural Policy made Walloon agriculture become more environment friendly in 2015
Burny, Philippe ULg; Petrescu, Dacinia Crina; Petrescu-Mag, Ruxandra Malina

in Babes-Bolyai University (Ed.) 11th International Conference on "Environmental Legislation, Safety Engineering and Disaster Management": book of abstracts (2016)

In Wallonia, organic farming continues to increase its share of agricultural activities, the number of organic farmers exceeding for the first time 10% of the total number of farmers in 2014, with 8.6% of ... [more ▼]

In Wallonia, organic farming continues to increase its share of agricultural activities, the number of organic farmers exceeding for the first time 10% of the total number of farmers in 2014, with 8.6% of the total agricultural area. Meadows represent 83% of the organic areas, general crops 15% and vegetables 1%. The number of cattle heads is still increasing, while poultry and laying hen recorded a significant progress during the last years. Organic products consumption is also increasing and the market share of organic products in food products reached 2.3% in 2014. On the other hand, the implementation of the new Common Agricultural Policy, and particularly its green payment, obliges 50% of Walloon farmers to practice crop diversification and 46% to have at least 5% of ecological focus area within their arable land in 2015, which represents more than 24,000 ha. So, organic farming and ecological focus areas do have today a significant share of the Walloon agricultural area, leading to a more sustainable agriculture. [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 detailLa signature dans les lettres du duc de Bourgogne Philippe le Bon
Dumont, Jonathan ULg; Marchandisse, Alain ULg

in Dumézil, Bruno; Vissière, Laurent (Eds.) Épistolaire politique II. Authentiques et autographes (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 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 detailConception of a near-IR spectrometer for ground-based observations of massive stars
Kintziger, Christian ULg; Desselle, Richard ULg; Loicq, Jerôme ULg et al

in Proc. SPIE Volume 9908 Ground-based and Airborne Instrumentation for Astronomy VI (2016)

In our contribution, we outline the different steps in the design of a fiber-fed spectrographic instrument that intends to observe massive stars. Starting from the derivation of theoretical relationships ... [more ▼]

In our contribution, we outline the different steps in the design of a fiber-fed spectrographic instrument that intends to observe massive stars. Starting from the derivation of theoretical relationships from the scientific requirements and telescope characteristics, the entire optical design of the spectrograph is presented. Specific optical elements, such as a toroidal lens, are introduced to improve the instrument’s performances. Then, the verification of predicted optical performances is investigated through optical analyses such as resolution checking. Eventually, the star positioning system onto the central fiber core is explained. [less ▲]

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See detail"Les Mages hellénisés". Portrait illusoire d'une sagesse barbare.
Swennen, Philippe ULg

in Aufrère, Sydney (Ed.) Sagesses barbares: Echanges et réappropriation dans l'espace culturel gréco-romain (2016)

Dans "Les Mages hellénisés", Cumont et Bidez ont tenté un compromis entre l'état de l'art contemporain de la rédaction de leur ouvrage et le contenu des sources classiques qu'ils ont collectées. L'examen ... [more ▼]

Dans "Les Mages hellénisés", Cumont et Bidez ont tenté un compromis entre l'état de l'art contemporain de la rédaction de leur ouvrage et le contenu des sources classiques qu'ils ont collectées. L'examen de ces dernières permet pourtant de douter que les premiers témoins grecs du monde achéménide aient cru en l'historicité récente de Zoroastre. [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 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 detailLes obligations, la responsabilité et l’assurance de l’architecte. Panorama général et pistes de réflexion
Kohl, Benoît ULg

in Uytterhoeven, Kristof (Ed.) L’architecte au 21ième siècle. Profession libérale ou entreprise protégée ? La loi du 20 février 1939 : 75 ans (2016)

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See detailImpacts of urban expansion on future flood damage: A case study in the River Meuse basin, Belgium
Mustafa, Ahmed; Bruwier, Martin ULg; Teller, Jacques ULg et al

in Erpicum, Sébastien; Dewals, Benjamin; Archambeau, Pierre (Eds.) et al Sustainable Hydraulics in the Era of Global Change: Advances in Water Engineering and Research (2016)

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See detailTracking a table tennis ball for umpiring purposes using a multi-agent system
Myint, Hnin; Wong, Patrick; Dooley, Laurence et al

in Proceedings of the 20th International Conference on Image Processing, Computer Vision, & Pattern Recognition (IPCV'16) (2016)

Tracking a table tennis ball for umpiring purposes is a challenging task as, in real-match scenarios, the ball travels fast and can become occluded or merged with other background objects. This paper ... [more ▼]

Tracking a table tennis ball for umpiring purposes is a challenging task as, in real-match scenarios, the ball travels fast and can become occluded or merged with other background objects. This paper presents the design of a multi-view based tracking system that can overcome the challenges of tracking a ball in real match sequences. The system has been tested on a complete table tennis rally and the results are very promising. The system is able to continuously track the ball with only marginal variations in detection. Furthermore, the initialization of the multi-camera system means it is both a portable and cost-effective solution for umpiring purposes. [less ▲]

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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 detailLes anaphores rhétoriques : des rafales de motifs ?
Longrée, Dominique ULg; Mayaffre, Damon; Mellet, Sylvie

in Mayaffre, Damon; Poudat, Céline; Vanni, Laurent (Eds.) et al Statistical Analysis of Textual Data, Proccedings of 13th International Conference on Statistical Analysis od Textual Data, 7-10 June 2016, Nice (2016)

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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 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 detailLaBGen-P: A Pixel-Level Stationary Background Generation Method Based on LaBGen
Laugraud, Benjamin ULg; Pierard, Sébastien ULg; Van Droogenbroeck, Marc ULg

in 2016 International Conference on Pattern Recognition Contest Proceedings (2016)

Estimating the stationary background of a video sequence is useful in many applications like surveillance, segmentation, compression, inpainting, privacy protection, and computational photography. To ... [more ▼]

Estimating the stationary background of a video sequence is useful in many applications like surveillance, segmentation, compression, inpainting, privacy protection, and computational photography. To perform this task, we introduce the LaBGen-P method based on the principles of LaBGen and the conclusions drawn in the corresponding paper. It combines a pixel-wise median filter and a pixel selection mechanism based on a motion detection performed by the frame difference algorithm. By working with pixels instead of patches, as originally done in LaBGen, it avoids some discontinuities between different spatial areas and generates better visual results. In this paper, we describe the LaBGen-P method, study its performance on the sequences of the SBMnet dataset, and compare it to that of LaBGen and other methods on the same dataset. Both algorithms emerged as the best ones during the IEEE Scene Background Modeling Contest (SBMC) organized in 2016. However, as there is not yet a good understanding of the recommended metrics, and due to the small amount of video sequences provided with the corresponding ground truth, we have performed a subjective evaluation. More precisely, 35 human experts were asked to compare background images estimated by LaBGen-P and LaBGen, and select the best one. From these experiments, it turns out that the results of LaBGen-P are preferred for about two thirds of the video sequences. Note that we provide an open-source C++ implementation at http://www.telecom.ulg.ac.be/labgen. [less ▲]

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