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See detailA Raster SOLAP Designed for the Emergency Services of Brussels Agglomeration
Kasprzyk, Jean-Paul ULiege; Donnay, Jean-Paul ULiege

in CLOUD COMPUTING 2017 - The Eighth International Conference on Cloud Computing, GRIDs, and Virtualization (2017, February 20)

In order to quickly reach incident locations, emergency services have to fairly distribute their resources on the territory. This distribution is based on an analysis which depends on heterogeneous ... [more ▼]

In order to quickly reach incident locations, emergency services have to fairly distribute their resources on the territory. This distribution is based on an analysis which depends on heterogeneous spatial data like past interventions (recurring risk), specific geographical places (sporadic risk), road network or socio-economic variables. On the other hand, Spatial Online Analytical Processing (SOLAP) tools are designed for the collection and the analysis of large spatial data sets. In this study, an original raster SOLAP model is implemented for emergency services of Brussels agglomeration. It allows decision-makers to freely generate risk maps (continuous fields), depending on several dimensions (time, intervention type, risk type, etc.), and to compare them with the accessibility of firefighters and ambulances. Simulations can also be performed on resources locations to see their impact on the main accessibility. [less ▲]

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See detailBest Practices for NZEB design in Mixed & Cooling Dominated Climates
Attia, Shady ULiege

in HARPUTLUGİL, Timuçin (Ed.) Symposium for Improving Energy Efficiency in Buildings Project (2017, February 14)

High performance buildings including net zero energy buildings (NZEB) are facing difficulty to become market mainstream in warm and hot climates. Beside the economic there are serious technical and design ... [more ▼]

High performance buildings including net zero energy buildings (NZEB) are facing difficulty to become market mainstream in warm and hot climates. Beside the economic there are serious technical and design challenges that hampers design teams design, construct and operate NZEB in mixed and cooling dominated climates. There is a difficulty to make the Passive House standard cross the heating dominated climatic zones in Northern and Central Europe to get implemented in mixed or cooling dominated climates as an ultra-energy efficient building concept. There is a need for setting new climate adaptive energy efficiency target metrics for NZEBs in warm and hot climates. This paper presents guidance and recommendations on the necessary performance target metrics for NZEBs and makes them explicit. Results are based on cross analysis of several case studies, presenting an overview of challenges and providing recommendations based on available empirical evidence to further lower those barriers Worldwide with a focus on the European construction sector. By defining the performance thresholds for NZEBs including the metrics we offer design team the possibility of verification and design assessment during early design decision making phases to instil a kind of practical, evidence based and quantifiable guidance for high performance buildings and in particular NZEBs. [less ▲]

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See detailImplication for the use of benthic foraminifera as bio-indicators of pollution: The case study of the Northern coast of Sfax (South eastern Tunisia)
Lamourou, Ali ULiege; Touir, Jamel; Fagel, Nathalie ULiege

in YNHM 4TH YOUNG NATURAL HISTORY SCIENTISTS' MEETING (2017, February 12)

The use of foraminifers as bioindicators of pollution in coastal and paralic environments has undergone a very fast development. Among various criteria, morphological anomalies are sometimes considered as ... [more ▼]

The use of foraminifers as bioindicators of pollution in coastal and paralic environments has undergone a very fast development. Among various criteria, morphological anomalies are sometimes considered as pollution indicators. This paper presents a synthesis of the studies correlating foraminiferal assemblages and environmental concerns. Sediment cores retrieved along the northern coast of Sfax (Tunisia) are used to monitor the response of benthic foraminifera to modern pollution and environmental stress. Sediment samples were separated immediately after collection for benthic foraminifera analysis. Binocular microscope and the Scanning Electron Microscope (SEM) were carried out to identify the most significant, normal or deformed, specimens. All observations confirmed that foraminifera may be used as indicators of pollution after deconvoluting from natural impacts. The most sensitive foraminifera identified in the study area are Ammonia tepida, Ammonia beccarii, Elphidium crispum, Peneroplis pertususles Miliolidae, Peneroplis pertusus et Rosalina sp and Peneroplis planatus. The morphological study of benthic foraminifera from surface sediments attests for the pollution of the actual coast. This pollution is recorded in the benthic foraminifera tests mainly as shell deformations, chambers or streaks or abnormal colors. [less ▲]

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See detailLes commissaires d'Action française
Schmidt, Anne-Catherine ULiege

in Audigier, François (Ed.) Histoire des services d'ordre en France du XIXème siècle à nos jours (2017, February)

Les discours et les actes violents des camelots du roi sont bien connus et ont régulièrement été évoqués par l'historiographie. En revanche, l'organisation des commissaires d'Action française, chargés du ... [more ▼]

Les discours et les actes violents des camelots du roi sont bien connus et ont régulièrement été évoqués par l'historiographie. En revanche, l'organisation des commissaires d'Action française, chargés du maintien de l'ordre dans les manifestations, est assez méconnue. Ce papier tente d'y remédier. [less ▲]

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See detailAn App-based Algorithmic Approach for Harvesting Local and Renewable Energy Using Electric Vehicles
Dubois, Antoine; Wehenkel, Antoine; Fonteneau, Raphaël ULiege et al

in Proceedings of the 9th International Conference on Agents and Artificial Intelligence (ICAART 2017) (2017, February)

The emergence of electric vehicles (EVs), combined with the rise of renewable energy production capacities, will strongly impact the way electricity is produced, distributed and consumed in the very near ... [more ▼]

The emergence of electric vehicles (EVs), combined with the rise of renewable energy production capacities, will strongly impact the way electricity is produced, distributed and consumed in the very near future. This position paper focuses on the problem of optimizing charging strategies for a fleet of EVs in the context where a significant amount of electricity is generated by (distributed) renewable energy. It exposes how a mobile application may offer an efficient solution for addressing this problem. This app can play two main roles. Firstly, it would incite and help people to play a more active role in the energy sector by allowing photovoltaic (PV) panel owners to sell their electrical production directly to consumers, here the EVs’ agents. Secondly, it would help distribution system operators (DSOs) or transmission system operators (TSOs) to modulate more efficiently the load by allowing them to influence EV charging behaviour in real time. Finally, the present paper advocates for the introduction of a two-sided market-type model between EV drivers and electricity producers. [less ▲]

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See detailNonlinear Robust Control for Satellite Formation Flying via Adaptive Second-Order Sliding Modes
Cho, Hancheol ULiege; Kerschen, Gaëtan ULiege

in 27th AAS/AIAA Space Flight Mechanics Meeting, San Antonio 5-9 February 2017 (2017, February)

This paper presents a robust adaptive control methodology based on the concept of second-order sliding modes for satellite formation control in the presence of unknown, but bounded uncertainties. By ... [more ▼]

This paper presents a robust adaptive control methodology based on the concept of second-order sliding modes for satellite formation control in the presence of unknown, but bounded uncertainties. By introducing two sliding variables to achieve the concept of second-order sliding modes, a robust controller is designed so that it forces the first sliding variable to converge to a desired error box in a finite time. Then, the second sliding variable is automatically bounded in a much smaller region by sliding mode control theory, thereby considerably improving the control accuracy. The proposed control scheme is of a smooth form and effectively alleviates chattering. An adaptive law that updates the control gain is also presented without a priori knowledge of the uncertainties. Numerical simulations, in which a desired formation configuration is required to be precisely maintained under uncertain mass and external disturbances, are carried out to validate the efficiency and the accuracy of the proposed robust adaptive control scheme developed herein. [less ▲]

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See detailApproximate Bayes Optimal Policy Search using Neural Networks
Castronovo, Michaël ULiege; François-Lavet, Vincent ULiege; Fonteneau, Raphaël ULiege et al

in Proceedings of the 9th International Conference on Agents and Artificial Intelligence (ICAART 2017) (2017, February)

Bayesian Reinforcement Learning (BRL) agents aim to maximise the expected collected rewards obtained when interacting with an unknown Markov Decision Process (MDP) while using some prior knowledge. State ... [more ▼]

Bayesian Reinforcement Learning (BRL) agents aim to maximise the expected collected rewards obtained when interacting with an unknown Markov Decision Process (MDP) while using some prior knowledge. State-of-the-art BRL agents rely on frequent updates of the belief on the MDP, as new observations of the environment are made. This offers theoretical guarantees to converge to an optimum, but is computationally intractable, even on small-scale problems. In this paper, we present a method that circumvents this issue by training a parametric policy able to recommend an action directly from raw observations. Artificial Neural Networks (ANNs) are used to represent this policy, and are trained on the trajectories sampled from the prior. The trained model is then used online, and is able to act on the real MDP at a very low computational cost. Our new algorithm shows strong empirical performance, on a wide range of test problems, and is robust to inaccuracies of the prior distribution. [less ▲]

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See detailFlutter and limit cycle oscillation suppression using linear and nonlinear tuned vibration absorbers
Verstraelen, Edouard ULiege; Kerschen, Gaëtan ULiege; Dimitriadis, Grigorios ULiege

in Proceedings of the SEM IMAC XXXV (2017, February)

Aircraft are more than ever pushed to their limits for performance reasons. Consequently, they become increasingly nonlinear and they are more prone to undergo aeroelastic limit cycle oscillations ... [more ▼]

Aircraft are more than ever pushed to their limits for performance reasons. Consequently, they become increasingly nonlinear and they are more prone to undergo aeroelastic limit cycle oscillations. Structural nonlinearities affect aircraft such as the F-16, which can undergo store-induced limit cycle oscillations (LCOs). Furthermore, transonic buzz can lead to LCOs because of moving shock waves in transonic flight conditions on many aircraft. This study presents a numerical investigation of passive LCO suppression on a typical aeroelastic system with pitch and plunge degrees of freedom and a hardening stiffness nonlinearity. The absorber used is made of a piezoelectric patch glued to the plunge springs and connected to a resistor and an inductance forming a RLC circuit. A mechanical tuned mass damper absorber of similar configuration is also considered. The piezoelectric absorber features significant advantages in terms of size, weight and tuning convenience. The results show that both types of absorber increase the linear flutter speed of the system in a similar fashion but, when optimal, they lead to a sub-critical bifurcation while a super-critical bifurcation was observed without absorber. Finally, it is shown that the addition of a properly tuned nonlinear spring (mechanical absorber) or capacitor (piezo- electric absorber) can restore the super-criticality of the bifurcation. The tuning of the nonlinearity is carried out using numerical continuation. [less ▲]

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See detailConclusion
Marganne, Marie-Hélène ULiege

in Nocchi Macedo, Gabriel; Scappaticcio, Marie Chiara (Eds.) Signes dans les textes, textes sur les signes. Érudition, lecture et écriture dans le monde gréco-romain. Actes du colloque international (Liège, 6-7 septembre 2013) (2017, January 20)

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See detailImpact of Serious Games on Health and Well-being of Elderly: A Systematic Review
Nguyen, Thi Thanh Hai; Ishmatova, Diana; Tapanainen, Tommi ULiege et al

in Proceedings of the 50th Hawaiian International Conference on Systems Sciences (2017, January 06)

Besides their entertainment value, serious games can have beneficial therapeutic effects for elderly people that improve their health and well-being. Games are likely to be accepted by elderly persons who ... [more ▼]

Besides their entertainment value, serious games can have beneficial therapeutic effects for elderly people that improve their health and well-being. Games are likely to be accepted by elderly persons who have enjoyed games their lives, and because there are more and more of such elderly, it is important to investigate games as a therapeutic device. This research reviewed the literature focusing on the effects of games on elderly persons in three main types of effects: physical, cognitive, and social effects. The majority of reviewed papers focused on physical and cognitive effects, and were published in recent years, which emphasizes the relative novelty of this topic and suggests that future research will need to address social impact as well. In addition, while many papers claimed positive impacts as a result of using games, our review found that more attention should be given to research designs. [less ▲]

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See detailSymposium du réseau EVADIDA - Evaluer l’impact de l’introduction de certaines variables didactiques sur les démarches des élèves en résolution de problèmes arithmétiques : un levier pour l’enseignement ?
Fagnant, Annick ULiege; Gamo, Sylvie; Hanin, Vanessa

in 29e colloque de l'Admée Europe - L'évaluation : levier pour le développement professionnel et les apprentissages (2017, January)

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See detailIdentification of complex nonlinearities using cubic splines with automatic discretization
Dossogne, Tilàn ULiege; Noël, Jean-Philippe ULiege; Kerschen, Gaëtan ULiege

in Proceedings of the International Modal Analysis Conference (IMAC) XXXV (2017, January)

One of the major challenges in nonlinear system identification is the selection of appropriate mathematical functions to model the observed nonlinearities. In this context, piecewise polynomials, or ... [more ▼]

One of the major challenges in nonlinear system identification is the selection of appropriate mathematical functions to model the observed nonlinearities. In this context, piecewise polynomials, or splines, offer a simple and flexible representation basis requiring limited prior knowledge. The generally-adopted discretization for splines consists in an even distribution of their control points, termed knots. While this may prove successful for simple nonlinearities, a more advanced strategy is needed for nonlinear restoring forces with strong local variations. The present paper specifically introduces a two-step methodology to select automatically the location of the knots. It proposes to derive an initial model, using nonlinear subspace identification, and incorporating cubic spline basis functions with fixed and equally-spaced abscissas. In a second step, the location of the knots is optimized iteratively by minimizing a least-squares cost function. A single-degree-of-freedom system with a discontinuous stiffness characteristic is considered as a case study. [less ▲]

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See detailThermal history modelling to understand microstructures observed in repair technology of Ti-6Al-4V
Tran, Hoang Son ULiege; Tchuindjang, Jérôme Tchoufack ULiege; Hakan, Paydas et al

in Extended Abstract book of 14th Conf. on Computer Methods in Materials Technology KomPlasTech 2017 (2017, January)

Laser cladding is a metal deposition technique used to fabricate or repair components. In the present work Ti-6Al-4V deposits with a variable thickness are studied to assess the use of laser cladding as a ... [more ▼]

Laser cladding is a metal deposition technique used to fabricate or repair components. In the present work Ti-6Al-4V deposits with a variable thickness are studied to assess the use of laser cladding as a repair technology [1]. Solidification following melting and partial remelting of pre-existing layers is coupled with heat treatment of the solidified material due to the repeated heating and cooling cycles during building. The effect of the building strategy on the metallurgical characteristics of the material for a decreasing track length (DTL) or a constant track length (CTL) strategy is analyzed. Depending on the possible heat accumulation, the nature of the phases are determined by metallography and hardness maps of the deposits. Optical Microscopy (OM), Stereo Microscopy (SM), and Scanning Electron Microscopy (SEM) were used in order to study the microstructure. The generation of the microstructure results from the material thermal history. This one is computed by Finite Element Method and a careful analysis establishes the link between the phase state and the detailed thermal history. [less ▲]

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See detailUnsteady lifting line theory using the Wagner function
Boutet, Johan ULiege; Dimitriadis, Grigorios ULiege

in Proceedings of the 55th AIAA Aerospace Sciences Meeting (2017, January)

A method is presented to model the incompressible, attached, unsteady lift and moment acting on a thin three-dimensional wing in the time domain. The model is based on the combination of Wagner theory and ... [more ▼]

A method is presented to model the incompressible, attached, unsteady lift and moment acting on a thin three-dimensional wing in the time domain. The model is based on the combination of Wagner theory and lifting line theory trough the unsteady Kutta-Joukowsky theorem. The result is a set of closed form linear ordinary di erential equations that can be solved analytically or using a Runge-Kutta-Fehlberg algorithm. The method is validated against numerical predictions from an unsteady Vortex Lattice method for rectangular and tapered wings undergoing step or oscillatory changes in plunge or pitch. As the aerodynamic loads are written in state space form in the proposed method, they can be easily included in aeroelastic and flight dynamic calculations. [less ▲]

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See detailSomatic mosaicism is implicated in the etiology of XLAG syndrome
Rostomyan, Liliya ULiege; Daly, Adrian ULiege; Yuan, Bo et al

in Abstract book : Symposium "Perspectives in Endocrinology" (2017, January)

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See detailGenetic predisposition to breast cancer occuring in a male-to-female transsexual patient
Potorac, Iulia ULiege; CORMAN, Vinciane ULiege; Manto, Florence ULiege et al

in Abstract book : Symposium "Perspectives in Endocrinology" (2017, January)

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See detailAnalysis of Kids’ Athletics implementation in Wallonia
Jidovtseff, Boris ULiege; Wuillaume, Sandrine; Cloes, Marc ULiege

in Sakslahti, Arja (Ed.) Book of abstracts (2017, January)

Introduction Since decades in Wallonia (French speaking part of Belgium), athletics competitions for children are miniaturized versions of adults’ competitions. Despite the fact that it has been pointed ... [more ▼]

Introduction Since decades in Wallonia (French speaking part of Belgium), athletics competitions for children are miniaturized versions of adults’ competitions. Despite the fact that it has been pointed out that such kind of approach, based on performance, is not appropriated for motor learning and could result in an increased rate of dropout (1), no change has occurred since years. The International Association of Athletic Federation has developed and promoted a more appropriate model of competition for children under 10 years old: ‘Kids’Athletics’ (KA)(2). While this model is well known, it has not been selected by the Wallonian federation as the gold standard yet . This study aimed to analyze the perceived interest of a group of experts about KA, and to identify the strategies that could be considered for KA implementation in Wallonia. Methods Semi-structured interviews were conducted with 14 athletics or marketing experts (demographic presentation; knowledge about KA and personal experience with KA ; opinion about KA model in comparison with the traditional one, and ; strategies that could be helpful to implement KA in Wallonia). Results Findings showed that 12 experts knew the KA concept while 9 have experimented it in their own club. None mentioned an official competition between clubs. A list of KA’s advantages and disadvantages has been identified (organization, children needs, and development). All experts considered that KA was more adapted to children than traditional competition. Based on subjects’ proposals, a progressive strategy for KA implementation is suggested. It includes the support of the federation and recommends to start with the more convinced clubs. Conclusion This study confirms that KA should be implemented in Wallonia. In order to optimize the chances of success, it would be appropriate to multiply actions, taking into account the potential barriers identified by the experts. Keywords : Children, track and field, competition, Kids Athletics, Wallonia. References Gozzoli C., Locatelli, E., Massin, D., & Wangemann, B.. (2002). IAAF Kids’ Athletics : A team event for children. Monaco: IAAF Shields, D. L. & Bredemeier, B. L. (2009). True competition: A guide to pursuing excellence in sport and society. Champaign, IL: Human Kinetics. [less ▲]

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See detailMeasuring children motor skills with MOBACK-1: descriptive data and critical analysis
Jidovtseff, Boris ULiege; Vandeloise, Vérane; Cloes, Marc ULiege et al

in Sääkslahti, Arja (Ed.) The book of abstracts (2017, January)

Introduction The development of motor skills competencies is critical during childhood should be considered as the central learning outcome in physical education. Assessing motor competencies of the ... [more ▼]

Introduction The development of motor skills competencies is critical during childhood should be considered as the central learning outcome in physical education. Assessing motor competencies of the children make sense for teachers, trainers and researchers. The MOBAK-1 testing battery has been recently developed with the aim of assessing a wide panel of motor skills in relationship with locomotion and object-control abilities (1). This battery is complete and easy to use but present a scoring system that is only based on the success or the failure of the task. The aim of the study was to collect descriptive data from Belgian children with MOBAK-1, and to do a critical analysis of the scoring system through the analysis of the failure reasons in the tests. Methods The MOBAK-1 testing battery (1) was addressed to 166 primary school pupils (7.2±0.6 YO) coming from the French speaking part of Belgium. For each test, children received a score from 0 to 2, according to the number of success and fails in the task. Additionally, the evaluator took notes of the failure reasons when it occurs. Results Results from our subjects were in accordance with a previous study (1) for all tests except rolling and jumping tasks. The analysis of the failure reasons revealed that some criteria were too severe as some children failed while they were almost able to do the test correctly. This appeared especially in the rolling and jumping tests where the score did not really reflect the level of the children. Conclusion MOBACK-1 testing battery was successful to assess children motor skills for 6 out of 8 tests. Critical analysis of children failures in the tests revealed that some criteria seemed to be severe. Scoring system should be improved in order to inform about the children level in each test. References 1. Herrmann, C., Gerlach, E., & Seelig, H. (2015). Development and validation of a test instrument for the assessment of basic motor competencies in primary school. Measurement in Physical Education and Exercise Science, 19(2), 80-90. [less ▲]

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See detailExperimental Assessment of the Influence of Interface Geometries on Structural Dynamic Response
Dossogne, Tilàn ULiege; Jerome, Trevor; Lancereau, Damien et al

in Proceedings of the International Modal Analysis Conference (IMAC) XXXV (2017, January)

Jointed interfaces are sources of the greatest amount of uncertainty in the dynamics of a structural assembly. In practice, jointed connections introduce nonlinearity into a system, which is often ... [more ▼]

Jointed interfaces are sources of the greatest amount of uncertainty in the dynamics of a structural assembly. In practice, jointed connections introduce nonlinearity into a system, which is often manifested as a softening response in frequency response, exhibiting amplitude dependent damping and stiffness. Additionally, standard joints are highly susceptible to unrepeatability and variability that make meaningful prediction of the performance of a system prohibitively difficult. This high degree of uncertainty in joint structure predictions is partly due to the physical design of the interface. This paper experimentally assesses the influence of the interface geometry on both the nonlinear and uncertain aspects of jointed connections. The considered structure is the Brake-Reuß beam, which possesses a lap joint with three bolted connections, and can exhibit several different interface configurations. Five configurations with different contact areas are tested, identified, and compared, namely joints with complete contact in the interface, contact only under the pressure cones, contact under an area twice that of the pressure cones, contact only away from the pressure cones and Hertzian contact. The contact only under the pressure cone and Hertzian contact are found to behave linearly in the range of excitation used in this work. The contact area twice that of the pressure cone behaves between the complete contact and contact only under the pressure cone cases. [less ▲]

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See detailL’impact de l’introduction de schémas « range-tout » sur les démarches de résolution de problèmes arithmétiques en 4e année primaire
Auquière, Amélie ULiege; Demonty, Isabelle ULiege; Fagnant, Annick ULiege

in 29e colloque de l'Admée Europe - L'évaluation : levier pour le développement professionnel et les apprentissages (2017, January)

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See detailUne évaluation mutuelle pour soutenir les processus d’apprentissage et transformer les pratiques d’enseignement : ce qu’en disent de futurs enseignants du secondaire
Fagnant, Annick ULiege; Goffin, Christelle ULiege

in 29e colloque de l'Admée Europe - L'évaluation : levier pour le développement professionnel et les apprentissages (axe 4) (2017, January)

Dans une étude qui s’intéressait aux conceptions de futurs enseignants du secondaire (Goffin & Fagnant, 2016), nous avons notamment montré que ces derniers témoignent d’expériences très limitées en ... [more ▼]

Dans une étude qui s’intéressait aux conceptions de futurs enseignants du secondaire (Goffin & Fagnant, 2016), nous avons notamment montré que ces derniers témoignent d’expériences très limitées en matière d’évaluation formative : leur vécu en tant qu’élève fait davantage état de pratiques d’auto-notations (Rey & Feyfant, 2014) que de réelle autoévaluation. Sur la base de ce constat, nous leur avons fait vivre une expérience d’évaluation mutuelle (Bourgeois & Laveault, 2015) dans le cadre d’un cours de pédagogie générale. Cette communication présentera le dispositif mis en place, tout en y portant un regard critique documenté par plusieurs sources d’informations. En préparation de la séance-cible, les étudiants étaient invités à analyser une de leurs séquences à l’aide de la grille CompAS (Parmentier & Paquay, 2002). Ils devaient rédiger un texte présentant cette analyse et étaient prévenus que cette première ébauche serait évaluée par un autre étudiant en vue d’être retravaillée pour figurer dans leur rapport final. Après avoir pris connaissance et discuté de l’évaluation réalisée par un autre étudiant, ils ont pu affiner et poursuivre le travail initialement demandé, notamment en développant des pistes touchant aux différentes formes d’évaluation qu’ils pourraient pratiquer en classe avec leurs élèves dans le cadre de cette séquence de cours. Quelques exemples, issus des 231 travaux réflexifs recueillis en fin d’année, permettront d’illustrer leur compréhension de la perspective élargie de l’évaluation formative (Allal & Mottier Lopez, 2005). Une analyse des commentaires rédigés par les étudiants suite à l’expérience d’évaluation mutuelle vécue permettra également de pointer les avantages et les limites qu’ils perçoivent à ce dispositif et les retombées qu’ils envisagent pour leurs pratiques de classes. Outre quelques limites relevées, les résultats sont globalement positifs et montrent que cette expérience a ainsi pu, dans une certaine mesure, nourrir leurs processus d’apprentissage et leur développement professionnel. [less ▲]

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See detailCognitive functioning and multimodal neuroimaging interactions in patients with disorders of consciousness
Aubinet, Charlène ULiege; Murphy, Lesley; Gosseries, Olivia ULiege et al

in Journal of the International Neuropsychological Society (2017)

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See detailCodifying ‘Sacred Laws’ in Ancient Greece
Carbon, Jan-Mathieu ULiege; Pirenne-Delforge, Vinciane ULiege

in Jaillard, Dominique; Nihan, Christophe (Eds.) Writing Laws in Antiquity / L'écriture du droit dans l'Antiquité (2017)

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See detail15 years of composite modelling to enhance hydraulic structures studies
Erpicum, Sébastien ULiege; Dewals, Benjamin ULiege; Archambeau, Pierre ULiege et al

in SimHydro 2017: choosing the right model in applied hydralilcs (2017)

Physical and numerical modelling may be combined within so-called composite or hybrid modelling. This enables to taking optimal benefit of the respective strengths of each modelling approach, while ... [more ▼]

Physical and numerical modelling may be combined within so-called composite or hybrid modelling. This enables to taking optimal benefit of the respective strengths of each modelling approach, while compensating for their specific drawbacks. Different types of composite modelling may be identified, such as embedding a detailed physical model within a broader scale numerical model, interconnecting different physical and numerical models focusing each on specific processes, or validating a numerical model from experimental data before exploiting the numerical model to generate more results than available from the experimental facility. Besides, specifically in more basic research, composite modelling may also be used to improve in-depth understanding of the relative importance of different processes which act simultaneously in the experimental test and may be artificially separated in numerical simulations. All these advantages of composite modelling are illustrated in this paper through the presentation of several application examples resulting from the experience of the Research Group HECE of the University of Liege. [less ▲]

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See detailExEP yield modeling tool and validation test results
Morgan, Rhonda; Turmon, Michael; Delacroix, Christian ULiege et al

in Techniques and Instrumentation for Detection of Exoplanets VIII (2017)

EXOSIMS is an open-source simulation tool for parametric modeling of the detection yield and characterization of exoplanets. EXOSIMS has been adopted by the Exoplanet Exploration Programs Standards ... [more ▼]

EXOSIMS is an open-source simulation tool for parametric modeling of the detection yield and characterization of exoplanets. EXOSIMS has been adopted by the Exoplanet Exploration Programs Standards Definition and Evaluation Team (ExSDET) as a common mechanism for comparison of exoplanet mission concept studies. To ensure trustworthiness of the tool, we developed a validation test plan that leverages the Python-language unit-test framework, utilizes integration tests for selected module interactions, and performs end-to-end crossvalidation with other yield tools. This paper presents the test methods and results, with the physics-based tests such as photometry and integration time calculation treated in detail and the functional tests treated summarily. The test case utilized a 4m unobscured telescope with an idealized coronagraph and an exoplanet population from the IPAC radial velocity (RV) exoplanet catalog. The known RV planets were set at quadrature to allow deterministic validation of the calculation of physical parameters, such as working angle, photon counts and integration time. The observing keepout region was tested by generating plots and movies of the targets and the keepout zone over a year. Although the keepout integration test required the interpretation of a user, the test revealed problems in the L2 halo orbit and the parameterization of keepout applied to some solar system bodies, which the development team was able to address. The validation testing of EXOSIMS was performed iteratively with the developers of EXOSIMS and resulted in a more robust, stable, and trustworthy tool that the exoplanet community can use to simulate exoplanet direct-detection missions from probe class, to WFIRST, up to large mission concepts such as HabEx and LUVOIR. [less ▲]

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See detailStarshade orbital maneuver study for WFIRST
Soto, Gabriel; Sinha, Amlan; Savransky, Dmitry et al

in Techniques and Instrumentation for Detection of Exoplanets VIII (2017)

The Wide Field Infrared Survey Telescope (WFIRST) mission, scheduled for launch in the mid-2020s will perform exoplanet science via both direct imaging and a microlensing survey. An internal coronagraph ... [more ▼]

The Wide Field Infrared Survey Telescope (WFIRST) mission, scheduled for launch in the mid-2020s will perform exoplanet science via both direct imaging and a microlensing survey. An internal coronagraph is planned to perform starlight suppression for exoplanet imaging, but an external starshade could be used to achieve the required high contrasts with potentially higher throughput. This approach would require a separately-launched occulter spacecraft to be positioned at exact distances from the telescope along the line of sight to a target star system. We present a detailed study to quantify the Δv requirements and feasibility of deploying this additional spacecraft as a means of exoplanet imaging. The primary focus of this study is the fuel use of the occulter while repositioning between targets. Based on its design, the occulter is given an offset distance from the nominal WFIRST halo orbit. Target star systems and look vectors are generated using Exoplanet Open-Source Imaging Simulator (EXOSIMS); a boundary value problem is then solved between successive targets. On average, 50 observations are achievable with randomly selected targets given a 30-day transfer time. Individual trajectories can be optimized for transfer time as well as fuel usage to be used in mission scheduling. Minimizing transfer time reduces the total mission time by up to 4.5 times in some simulations before expending the entire fuel budget. Minimizing Δv can generate starshade missions that achieve over 100 unique observations within the designated mission lifetime of WFIRST. [less ▲]

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See detailMulti-mission modeling for space-based exoplanet imagers
Savransky, Dmitry; Delacroix, Christian ULiege; Garrett, Daniel

in Techniques and Instrumentation for Detection of Exoplanets VIII (2017)

In addition to the Wide-Field Infrared Survey Telescope Coronagraphic Imager (WFIRST CGI), which is currently scheduled for launch in the mid 2020s, there is an extensive, ongoing design effort for next ... [more ▼]

In addition to the Wide-Field Infrared Survey Telescope Coronagraphic Imager (WFIRST CGI), which is currently scheduled for launch in the mid 2020s, there is an extensive, ongoing design effort for next-generation, space-based, exoplanet imaging instrumentation. This work involves mission concepts such as the Large UV/ Optical/Infrared Surveyor (LUVOIR), the Habitable Exoplanet Imaging Misson (HabEx), and a starshade rendezvous mission for WFIRST, among others. While each of these efforts includes detailed mission analysis targeted at the specifics of each design, there is also interest in being able to analyze all such concepts in a unified way (to the extent that this is possible) and to draw specific comparisons between projected concept capabilities. Here, we discuss and compare two fundamental approaches to mission analysis, full mission simulation and depth of search analysis, in the specific context of simulating and comparing multiple different mission concepts. We present strategies for mission analysis at varying stages of concept definition, using WFIRST as a motivating example, and discuss useful metrics for cross-mission comparison, as well as strategies for evaluating these metrics. [less ▲]

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See detailA Comparison of Micro-objective Non-parametric Statistical Matching Techniques for the Integration of Different Survey Data
Eftekhar, Hamed ULiege; Cools, Mario ULiege

in Proceedings of the 96th Annual Meeting of the Transportation Research Board (2017)

Lack of information is often reported as one of the main study limitations in transport research. Other data sources provide an important opportunity, as the information from these data sources might be ... [more ▼]

Lack of information is often reported as one of the main study limitations in transport research. Other data sources provide an important opportunity, as the information from these data sources might be fully exploited when they are integrated using an appropriate mathematical framework. This paper determines which data integration techniques can be adopted in the context of road safety, and which criteria should be used to assess the quality of the integrated dataset. The paper contributes to the literature by providing a comparison of different techniques that allow the tabulation of the joint micro-data. To compare the suitability of different Statistical Matching techniques, data from the 2012 Belgium Road Safety Institute (BRSI) Attitude Survey and data from the 2010 Belgian National Household Travel Survey (BELDAM) are integrated. In particular, the socio-economic factor "Income" is being matched to the BRSI Attitude Survey data. The paper discusses and compares different non-parametric micro-objective Statistical Matching techniques, in which the “Income” variable from the BELDAM survey was added to the BRSI Attitude Survey. Based on similarity/dissimilarity measures, the Rank hot-deck Statistical Matching yielded the best result, which is in line with the existing literature. Moreover, from the results, it can be concluded that statistical data matching is a practically applicable technique, which can help overcome the lack of additional information. Further research should focus on using the integrated datasets with an attempt of expanding the scope of variables, and explicitly testing for omitted variable bias. [less ▲]

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See detailL’église Saint-Martin à Avennes : redécouverte du bâti roman
Baudry, Antoine ULiege

in Archaeologia Mediaevalis 40. Chroniques (2017)

Redécouverte d'un choeur roman considéré comme néo-roman par la littérature contemporaine

Detailed reference viewed: 116 (1 ULiège)
See detailLa diffusion des Blattmasken dans le bassin Méditerranéen. Entre tradition et innovation
Derwael, Stéphanie ULiege

in Actes du colloque "Colloque La diffusion des répertoires décoratifs en Méditerranée antique et médiévale" (2017)

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See detailRecent evolution of the consumption of organic food products in Belgium
Burny, Philippe ULiege

in VIII International Agriculture Symposium "AGROSYM 2017" : book of abstracts (2017)

The consumption of organic food products in Belgium increased significantly and continuously between 2008 and 2016, growing from 1.5 % to 3.2% of the total consumers' expenses for fresh food products ... [more ▼]

The consumption of organic food products in Belgium increased significantly and continuously between 2008 and 2016, growing from 1.5 % to 3.2% of the total consumers' expenses for fresh food products. Nine percent of Belgian families buy organic food products at least once per week and represent 60% of the total expenses. The total expenses per capita reached nearly 33€ in 2015. The main expenses concerned dairy products (6.72 €/capita), vegetables (5.57) and fruits (4.40). These expenses have been globally increasing. The market share of organic products considerably varies from one type of food products to another: it is the highest for meat substitutes (24.6% in 2016) and eggs (14.0%), while it reaches 3.0% for dairy products, 6.6% for vegetables and 4.3% for fruits. These percentages have been globally increasing during the last years. Vegetable products have been proportionally more sold th an animal products compared to the situation in the conventional market. Supermarkets and specialized shops are the most common distribution channels, direct sales on farms and open markets remaining marginal. Families with high income and children and retired people with high income are those who spend the most on organic food products. This evolution is supported by the Walloon government through the organic farming development plan. [less ▲]

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See detailOpportunities and challenges for the fresh straw mushroom value chain development in Vietnam
HO, Thi Minh Hop ULiege; Burny, Philippe ULiege; Helder, Jan et al

in VIII International Agriculture Symposium "AGROSYM 2017": book of abstracts (2017)

Straw mushroom sector has been strongly growing in Vietnam since last decade with more th an 64,500 tons/year of production. The development of the sector helps improving both farm household's income and ... [more ▼]

Straw mushroom sector has been strongly growing in Vietnam since last decade with more th an 64,500 tons/year of production. The development of the sector helps improving both farm household's income and the environment by reducing pollution from rice straw buming at the end of the rice cuItivation season. Basing on the potential of the sector, Vietnamese govemment issued an agricultural development programme in 2010 in which mushrooms will be the focus to develop as one of five national strategie commodities. ln order to help the sector reaching this goal and growing more sustainably, the study was carried out in 2014 and 2016 to identify its opportunities and challenges by analysing stakeholders in the fresh straw mushroom value chain. The study was carried out through different meetings among the main actors of the straw mushroom value chain in August 2014 in Can Tho and in 2016 in Dong Nai province, Vietnam, to get opinions of target groups, key persons, as weil as information conceming the aims of the study. An analysis of the main stakeholders was conducted to identify opportunities and challenges for the sector to grow more sustainably. Low investment costs, depending on production scale, quickly received income circle, low land and labour effort use are the main opportunities for farmers while limited use of improved productionlprocessing technologies, limited production due to the seasonal character and c1imatic conditions are the main challenges for the other stakeholders of straw mushroom value chain. To enhance the use of hi-technology in production, preservation and processing and to build a brand for the Vietnamese straw mushroom are proposed to improve the current issues of the sector. [less ▲]

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See detailThermo-economic optimization during preliminary design phase of organic Rankine cycle systems for waste heat recovery from exhaust and recirculated gases of heavy duty trucks
Guillaume, Ludovic ULiege; Legros, Arnaud; Dickes, Rémi ULiege et al

in IMechE (Ed.) Vehicle Thermal Management Systems conference (2017)

Waste heat recovery (WHR) Organic Rankine Cycle (ORC) system is a very promising technology for reducing fuel consumption and consequently the CO2 emissions of future heavy-duty trucks (HDT). Nonetheless ... [more ▼]

Waste heat recovery (WHR) Organic Rankine Cycle (ORC) system is a very promising technology for reducing fuel consumption and consequently the CO2 emissions of future heavy-duty trucks (HDT). Nonetheless, the adoption of this technology in the automotive domain requires specific R&D activities going from the system definition to the on-board integration. This study focuses on the preliminary design phase of ORC systems recovering the heat wasted from two of the sources available on a HDT: the exhaust and recirculated gases. From these heat sources and their combinations, 6 possible architectures are identified. On the other hand, 4 volumetric expansion machine technologies are considered (scroll, screw, piston and vane Expanders). At the end, 24 topologies are therefore modelled considering the main components (Pump, Heat exchangers, Expansion machines). A three-step optimization method is proposed to identify the most promising system. First, the most suitable conditions are identified for the design of the ORC systems using a simple model of volumetric expansion machine. In a second step, the design phase, using more detailed models for the expansion machines, a thermos-economic optimization is performed. Finally, in a third step, the output power of the latter system models is maximized in off-design conditions, optimizing the evaporating pressure and the overheating degree. [less ▲]

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See detailFrance et Italie à l'époque du Grand Schisme. La politique par les bannières
Masson, Christophe ULiege

in Vaillancourt, Luc (Ed.) « Des bruits courent » : rumeurs et propagande au temps des Valois (2017)

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See detailExploring molecular antipodes with flow chemistry
Monbaliu, Jean-Christophe ULiege

in Monbaliu, Jean-Christophe (Ed.) FROST 6 (2017)

This lecture illustrates our work in flow chemistry with chemicals at the antipodes of molecular complexity. The first example deals with the valorization of biomass-derived small platform molecules, and ... [more ▼]

This lecture illustrates our work in flow chemistry with chemicals at the antipodes of molecular complexity. The first example deals with the valorization of biomass-derived small platform molecules, and in particular the implementation of a deoxydehydration (DODH) reaction of glycerol towards allyl alcohol under continuous-flow conditions. The combination of a unique reactive dynamic feed solution approach and short exposure to high temperature gave high yield and excellent selectivity in the presence of formic acid, triethyl orthoformate, or a combination of both. The second example deals with the preparation of large bio macromolecules, and in particular the implementation of chemical native ligation towards peptide constructs under continuous-flow conditions. The combination of the unique assets of microfluidic reactors and the development of new reagents/conditions were exploited to perform extremely fast ligations at difficult junctions that are notoriously time-consuming. Ligation times down to 2 min were achieved, with excellent conversion and overall isolated yields for a range of macrocylic peptides bearing up to 29 residues. The reaction conditions were also amenable, upon minor adjustments, to less hindered junctions. [less ▲]

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See detailLes fondamentaux de la pédagogie (expérimentale) appliqués à l'hygiène en 2017
Leclercq, Dieudonné ULiege

in SF2H (Ed.) Actes du Colloque (2017)

Rapid overview of the three O-M-E pillars of a training program or an educative purposeful action applied to hygiene: (O) The objectives (structured by the ASCID model for diagnosing educational needs of ... [more ▼]

Rapid overview of the three O-M-E pillars of a training program or an educative purposeful action applied to hygiene: (O) The objectives (structured by the ASCID model for diagnosing educational needs of patients and of caregivers ; (M) The Methods (structured by the Learning Events Model- LEM) and (E) the Evaluations, illustrated by two methods quite different but complementary: confidence degrees in responses and OSCE: Objective Structured Clinical Exams. [less ▲]

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See detailEffect of orthopedic implants on long bone properties : a combined experimental and numerical approach
Laurent, Cédric; Verwaerde, Jolante; Böhme, Béatrice ULiege et al

in A définir (2017)

Long bone fracture constitutes a common reason for medical consultation within veterinary orthopedic services (Miller et al. 1998; Kumar et al. 2007). Canine bone fracture repair differs from the human ... [more ▼]

Long bone fracture constitutes a common reason for medical consultation within veterinary orthopedic services (Miller et al. 1998; Kumar et al. 2007). Canine bone fracture repair differs from the human case in the sense that (1) the physiological characteristics and morphology of the injured bones in animals vary considerably (Palierne et al. 2006), (2) the animal is not able to limit its activity during the post-operative period, leading to premature overloading, and (3) the surgeon is confronted to cost limitations concerning orthopedic material. There is a lack of studies assessing the effect of different treatment types on the biomechanical properties of a reconstructed bone, which may partly explain the frequent associated complications in the field of canine fracture repair (Dvořák et al. 2000; Jackson & Pacchiana 2004). In this work, we evaluate the effect of such orthopedic reconstructions on the behavior of canine humeri in compression, using a combined experimental and numerical approach. [less ▲]

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See detailUnderground pumped hydroelectric energy storage in Wallonia (Belgium) using old mines - Hydraulic modelling of the reservoirs
Erpicum, Sébastien ULiege; Archambeau, Pierre ULiege; Dewals, Benjamin ULiege et al

in Aminuddin, Ab. Ghani (Ed.) Proceedings of the 37th IAHR World Congress (2017)

Pumped Storage Hydroelectricity (PSH) is a well-known and efficient technology to store and release various amounts of electricity. To overcome the problem of available land surface to create new ... [more ▼]

Pumped Storage Hydroelectricity (PSH) is a well-known and efficient technology to store and release various amounts of electricity. To overcome the problem of available land surface to create new reservoirs, an alternative consists in using underground volumes to build so-called Underground Pumping Storage Hydroelectricity (UPSH) plants. A research project is currently investigating the feasibility of such UPSH plants in Wallonia (Belgium) using abandoned mines and underground quarries. The paper presents the main features of this multidisciplinary project and focuses on the numerical models developed specifically to consider the reservoirs’ hydraulics. Indeed, the detailed prediction of the water mass movements in the reservoirs is a key element of a feasibility analysis, as they may affect the turbomachines operation as well as the solicitations of the reservoirs limits. On the other hand, such prediction is challenging because of the complex geometry, the continuous discharge variations and the possible exchanges with the surrounding soil or the interaction with air in underground reservoirs. The application of the hydraulic model to an abandoned slate quarry highlights the usefulness of the approach and also its limitations. [less ▲]

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See detailCOMPARAISON DE DIFFERENTES METHODES DE CONTRÔLE A POSTERIORI DU COMPACTAGE DES REMBLAIS
Welter, Philippe ULiege; Charlier, Robert ULiege; Janssens, Benoit

in Actes du Congrès Belge de la Route (2017)

Detailed reference viewed: 27 (0 ULiège)
See detailLe plan zonal de sécurité, instrument d'accountability de la police locale ?
Croquet, Alice ULiege

in Ficet, Joël; Fallon, Catherine (Eds.) Actes du Colloque de l'ABSP - "Crise de la démocratie et nouveau management public" : Liège, 10-11 avril 2014 (2017)

La contribution propose d'analyser dans quelle mesure l'on peut comprendre le Plan Zonal de Sécurité comme un outil d'accountability des zones de police locale.

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See detailA best fit heuristic for the three-dimensional Bin Packing Problem with practical constraints from an air transportation application
Paquay, Célia ULiege; Limbourg, Sabine ULiege; Schyns, Michael ULiege

in Proceedings of the BIVEC-GIBET Transport Research Days 2017 (2017)

This work considers the three-dimensional Multiple Bin Size Bin Packing Problem which consists in packing a set of cuboid boxes into containers of various shapes, while minimising unused space. The aim of ... [more ▼]

This work considers the three-dimensional Multiple Bin Size Bin Packing Problem which consists in packing a set of cuboid boxes into containers of various shapes, while minimising unused space. The aim of the present work is to find good initial solutions in short computational times. In this purpose, a fast best fit heuristic able to manage the different constraints to be met in transportation is developed. The heuristic is split into two distinct phases. The first phase deals with the packing of boxes into identical bins using an extension of the Extreme Points rule. During this phase, the fragility, stability and orientation of the boxes are taken into account, as well as the special shape of the bins and their weight capacity. The second phase considers the multiple types of available bins. If necessary, the best loading pattern identified is enhanced with respect to weight distribution in post processing. After parametrisation, computational experiments are performed on data sets specially designed for this application. The heuristic requires very short computational times to achieve promising results. [less ▲]

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See detailFrançois Ier et les arts du Nord (1515-1547). Des liens à explorer et à appronfondir encore
Fagnart, Laure ULiege; Lecocq, Isabelle

in Fagnart, Laure; Lecocq, Isabelle (Eds.) François Ier et les arts du Nord (1515-1547) (2017)

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See detailFêtes en réseau et réseaux de l’imaginaire dans les fêtes jésuites de 1622
De Marco, Rosa ULiege

in DEMEULENAERE-DOUYÈRE, Christiane (Ed.) Les acteurs du développement des réseaux (2017)

Posant ses bases sur la nature réticulaire des fêtes jésuites, reflet de l’organisation administrative et des visées universelles de la Compagnie de Jésus, l’étude se propose de comprendre l’effet de la ... [more ▼]

Posant ses bases sur la nature réticulaire des fêtes jésuites, reflet de l’organisation administrative et des visées universelles de la Compagnie de Jésus, l’étude se propose de comprendre l’effet de la fête en réseau sur la réception des messages qu’elle véhicule et qu’elle construit. Pour ce faire, elle s’attache à l’analyse des fêtes qui se déroulèrent en France pendant l’année 1622, mettant en relation le réseau des fêtes de canonisation de saint Ignace de Loyola et de saint François Xavier avec celui des entrées solennelles de Louis XIII. L’analyse synchronique de ces fêtes a enfin l’ambition de montrer comment elles établissaient un réseau à la fois conceptuel et concret fondé sur des pratiques de représentation et de démonstration du pouvoir politique, en contribuant à la fabrication de l’image de la monarchie et du souverain de France. [less ▲]

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

in Flores-Lonjou, Magalie (Ed.) Frontière(s) au cinéma - Actes des septièmes rencontres "Droit et cinéma" (2017)

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

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

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See detailCould Piano key weirs be subject to nappe oscillations?
Lodomez, Maurine ULiege; Pirotton, Michel ULiege; Dewals, Benjamin ULiege et al

in 3rd International Workshop on Labyrinth and Piano Key Weirs - PKW 2017 (2017)

Nappe oscillation may affect a variety of free overflow hydraulic structures operating at low heads such as crest gates and various types of weirs. This phenomenon produces oscillations in the thin nappe ... [more ▼]

Nappe oscillation may affect a variety of free overflow hydraulic structures operating at low heads such as crest gates and various types of weirs. This phenomenon produces oscillations in the thin nappe cascading downstream of the control structure. These oscillations can result in a high noise levels that may affect people and structures located nearby. With long linear and thin overtopping walls, piano key weirs might be subject to strong nappe oscillation risks, as a few documented cases with labyrinth weirs. However, the specific geometric features of piano key weirs, such as the outlet ramps or the limited width of the inlet apex, could perhaps prevent the development of nappe oscillation. In this paper, a prototype-scale linear weir is operated to assess the risk of nappe oscillations on a piano key weir like configuration (sidewall). In particular, the effect of the weir width and inclined apron is analyzed. The experimental results show that nappe oscillation development should not occur on piano key weir, contrary to what might be observed on a labyrinth weir with the same crest. [less ▲]

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See detailLa bataille de (la) Ptérie. La Lydie face à la Perse (ca. 547 av. J.-C.)
Leloux, Kevin ULiege

in Xhayet, G. (Ed.) NEUVIÈME CONGRÈS DE L'ASSOCIATION DES CERCLES FRANCOPHONES D'HISTOIRE ET D'ARCHÉOLOGIE DE BELGIQUE et LVIe CONGRÈS DE LA FÉDÉRATION DES CERCLES D'ARCHÉOLOGIE ET D'HISTOIRE DE BELGIQUE CONGRÈS DE LIÈGE 23-26 AOÛT 2012 (2017)

Chacun sait que chez les anciens Grecs, Crésus passait pour un roi richissime à la tête d’un des plus puissants royaumes de son temps. En apportaient la preuve ses nombreuses offrandes consacrées au ... [more ▼]

Chacun sait que chez les anciens Grecs, Crésus passait pour un roi richissime à la tête d’un des plus puissants royaumes de son temps. En apportaient la preuve ses nombreuses offrandes consacrées au sanctuaire de Delphes, visibles de tous. L’épisode de sa mort sur un bûcher, un des moments les plus dramatiques de son existence, fut évoqué par nombre d’auteurs anciens et elle a fait l’objet de représentations figurées tout au long de l’Antiquité. Enfin, il ne faut pas oublier que pour un Grec du VIe siècle, l’homme passait pour constituer comme un rempart infranchissable protégeant les cités grecques de la côte d’Asie Mineure contre la puissance montante des Perses de Cyrus II le Grand. Ainsi la défaite inattendue du roi lydien face aux troupes perses en Ptérie constitue-t-elle un épisode décisif de l’époque archaïque grecque dans la mesure où elle signe la fin prochaine du royaume lydien et de son formidable maître. Les cités grecques d’Asie Mineure allaient vite devoir face à leur destin : une soumission aux Perses puis leur révolte entraînant les terribles guerres médiques. Dans notre exposé, on mettra l’accent sur les causes de cette bataille décisive perdue par Crésus à Ptérie, sur son déroulement et ses enjeux à la lumière des sources à notre disposition. On sera amené à analyser le tracé de la Route royale empruntée par le dernier descendant de Gygès pour se rendre en Cappadoce ; on aura ainsi l’occasion de voir que son existence est bien antérieure à l’arrivée des Perses en Anatolie occidentale. Enfin notre exposé présentera la localisation exacte de la ville de Ptérie, une question débattue depuis longtemps mais que des fouilles archéologiques récentes ont permis d’éclairer. [less ▲]

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See detailA computational model of mid-term outage scheduling for long-term system studies
Marin, Manuel ULiege; Karangelos, Efthymios ULiege; Wehenkel, Louis ULiege

in PowerTech Manchester 2017 Proceedings (2017)

This paper presents a computational model of the mid-term outage scheduling process of electric power transmis- sion assets, to be used in long-term studies such as mainte- nance policy assessments and ... [more ▼]

This paper presents a computational model of the mid-term outage scheduling process of electric power transmis- sion assets, to be used in long-term studies such as mainte- nance policy assessments and system development studies, while accounting for the impact of outage schedules on short-term system operation. We propose a greedy algorithm that schedules the outages one by one according to their impact on system operation estimated via Monte-Carlo simulations. The model is implemented in JULIA and applied to the IEEE RTS-96. [less ▲]

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See detailUne présence coloniale en mutation : le cas des Italiens au Congo Belge. La fin des Connazionali et le début des ambitions d’Enrico Mattei (1957-1961)
Genin, Vincent ULiege

in Pierre Halen (Ed.) Des Italiens au Congo aux Italiens du Congo (2017)

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See detailFaire les courses au quotidien. L’approvisionnement alimentaire d’un groupe de migrantes marocaines en Italie en temps de crise
Mescoli, Elsa ULiege

in Matagne, Geoffroy; Van Ingelgom, Virginie (Eds.) Politiques de crise, crises du politique (2017)

La crise généralisée qui, depuis quelques années, a affaibli les économies de nombre d’états, a eu des conséquences sur la typologie des migrations internationales : les trajectoires, les projets, les ... [more ▼]

La crise généralisée qui, depuis quelques années, a affaibli les économies de nombre d’états, a eu des conséquences sur la typologie des migrations internationales : les trajectoires, les projets, les destinations, les départs se sont modifiés en fonction de nouveaux facteurs auxquels les individus et les groupes étaient confrontés . A côté de ces macro-dynamiques globales, la crise a également engendré des changements dans la vie quotidienne des migrants lorsqu’ils étaient déjà partis et qu’ils s’étaient déjà installés ailleurs. Dans ce cadre, ma contribution vise à analyser les pratiques d’approvisionnement alimentaire d’un groupe de migrantes marocaines en Italie mettant en place des stratégies pour faire face aux conséquences concrètes de la crise économique (notamment la diminution de leur pouvoir d’achat en conséquence de leur précarité professionnelle). Au travers de plusieurs déplacements dans la ville où elles habitaient et de la mobilisation des réseaux familiaux alimentant des circuits informels d’échange de biens, ces femmes satisfaisaient leurs différentes exigences – parmi lesquelles le désir de performer des préparations propres à leur mémoire incorporée – tout en répondant aux contraintes économiques déterminées par la crise. Je vais ainsi démontrer qu’en dépit des difficultés rencontrées, ces femmes arrivaient à exercer une agency dans le nouvel espace vécu et à se positionner de façon active au travers de leurs choix et conduites quotidiennes. [less ▲]

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See detailMachine Learning of Real-time Power Systems Reliability Management Response
Duchesne, Laurine ULiege; Karangelos, Efthymios ULiege; Wehenkel, Louis ULiege

in PowerTech Manchester 2017 Proceedings (2017)

In this paper we study how supervised machine learning could be applied to build simplified models of real-time (RT) reliability management response to the realization of uncertainties. The final ... [more ▼]

In this paper we study how supervised machine learning could be applied to build simplified models of real-time (RT) reliability management response to the realization of uncertainties. The final objective is to import these models into look-ahead operation planning under uncertainties. Our response models predict in particular the real-time reliability management costs and the resulting reliability level of the system. We tested our methodology on the IEEE-RTS96 benchmark. Among the supervised learning algorithms tested, extremely randomized trees, kernel ridge regression and neural networks appear to be the best methods for this application. Furthermore, by using feature “importances” computed by tree-based ensemble methods, we were able to extract the most relevant variables to predict the response of real-time reliability management, and thus obtain a better understanding of the system properties. [less ▲]

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See detailDeformación del espacio: cuestiones de representación y de identidad de Cortázar a la autoficción neofantástica
Licata, Nicolas ULiege

in Agraz Ortiz, Alba; Sánchez-Hernández, Sara (Eds.) Topografías literarias. El espacio en la literatura hispánica de la Edad Media al Siglo XXI (2017)

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See detailAsynchronous Power Flow on Graphic Processing Units
Marin, Manuel ULiege; Defour, David; Milano, Federico

in Proceedings - 2017 25th Euromicro International Conference on Parallel, Distributed and Network-Based Processing (2017)

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See detailStimmstörungen bei Lehrkräften im Vorbereitungsdienst
Schiller, Isabel ULiege

in Hannken-Illjes, Kati (Ed.) Stimme Medien Sprechkunst (2017)

Lehrer weisen ein erhöhtes Risiko auf, Stimmstörungen zu entwickeln. Sogar Lehramtsstudierende sind bereits zu etwa 20% betroffen, obwohl die stimmlichen Anforderungen während des Studiums noch gering ... [more ▼]

Lehrer weisen ein erhöhtes Risiko auf, Stimmstörungen zu entwickeln. Sogar Lehramtsstudierende sind bereits zu etwa 20% betroffen, obwohl die stimmlichen Anforderungen während des Studiums noch gering ausfallen (vgl. Ettehad 2004). Nur unzureichend wurde bislang die Stimme von Lehrkräften im Vorbereitungsdienst (LiV) untersucht. Gleichwohl ist der Vorbereitungsdienst ein kritischer Zeitraum. LiV unterrichten etwa 12 Stunden pro Woche und stehen unter hohem Leistungsdruck. Dies kann sich potentiell negativ auf die Stimme auswirken. Ziel der Studie war es demnach, die Prävalenz und Art von Stimmstörungen bei Lehrkräften im Vorbereitungsdienst zu bestimmen. Weiterhin sollten Zusammenhänge zwischen subjektiven und objektiven stimmbezogenen Daten untersucht werden. 73 LiV nahmen an der Studie teil, die sich aus einem selbstkonzipierten Fragebogen und der Erhebung objektiver Daten zusammensetzt. Probanden, die im Fragebogen angaben, während des Vorbereitungsdienstes bereits zwei oder mehr Symptome einer Stimmstörung wahrgenommen zu haben, wurden als stimmgestört klassifiziert. Anhand objektiver Messungen wurden zudem die Variablen maximale Tonhaltedauer (THD), Jitter und Shimmer erhoben und mit den subjektiven Daten in Beziehung gesetzt. Bei 37% der Probanden ergaben sich Hinweise auf das Vorliegen einer Stimmstörung. Besonders häufig wurden die Symptome Rauigkeit, Räusperzwang oder Lautstärkeprobleme genannt. Es bestand kein signifikanter Zusammenhang zwischen den subjektiven und den objektiven Daten. Die Ergebnisse deuten darauf hin, dass angehende Lehrkräfte im Zeitraum des Vorbereitungsdienstes vermehrt zu Stimmproblemen neigen. Dies unterstreicht die Notwendigkeit von interventiven Maßnahmen, die bereits im Studium zum Tragen kommen sollten. [less ▲]

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See detailPortrait et durabilité de différentes voies de valorisations des ressources céréalières wallonnes. Résultats extraits du projet ALT-4-CER
Van Stappen, Florence; Delcour, Alice ULiege; Decruyenaere, Virginie et al

in Bodson, Bernard; Watillon, Bernard (Eds.) Livre Blanc Céréales : 1967-2017 : 50 ans de partenariat entre agriculteurs et chercheurs. Edition février 2017 (2017)

Cet article a pour but de communiquer de manière succincte les résultats du projet ALT-4-CER, financé par le Centre wallon de Recherches agronomiques (CRA-W) sur base des fonds de la loi de ... [more ▼]

Cet article a pour but de communiquer de manière succincte les résultats du projet ALT-4-CER, financé par le Centre wallon de Recherches agronomiques (CRA-W) sur base des fonds de la loi de défiscalisation des institutions de recherches Moerman. Ce projet s'est déroulé de mars 2011 à juillet 2015. Le projet comportait les objectifs suivants : (1) dresser un portrait des utilisations actuelles des céréales wallonnes ; (2) élaborer des scénarios originaux d'évaluations possibles de l'utilisation des céréales wallonnes en concertation avec le secteur wallon ; (3) évaluer, sur base d'analyses du cycle de vie (ACV), les impacts environnementaux (et socio-économiques, disponibles mais non repris dans cet article) de la production et la transformation des céréales wallonnes selon des exemples de filières de valorisation. L'article présente des informations, extraites des résultats du projet, sur le portrait en 2010 de la valorisation des céréales wallonnes et sur l'estimation de l'impact environnemental de la production de céréales en Wallonie. Il se limite à donner les conclusions et messages-clés de l'étude sur la construction de scénarios possibles d'évolution de l'utilisation des céréales wallonnes d'une part et, d'autre part, sur l'utilisation des céréales pour la production d'énergie. [less ▲]

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See detailImportance of parenteral nutrition in feeding the premature infant
SENTERRE, Thibault ULiege

in International Conference for Advancing Nutrition - Neonatology, Brussels (2017)

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See detailSpazio scritto e spazio non scritto nelle dossografie mediche su papiro
Ricciardetto, Antonio ULiege

in Pellé, Natascia (Ed.) Spazio scritto e spazio non scritto nel libro papiraceo: esperienze a confronto (2017)

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See detailDiplomatie sur le terrain : la première mission diplomatique florentine en territoire mamelouk.
Rizzo, Alessandro ULiege

in Culture matérielle et contacts diplomatiques entre l’Occident latin, Byzance et l’Orient islamique (XIe-XVIe siècle). (2017)

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See detailLe juge doit-il être frappé d'anathème? Examen de la responsabilité civile pour la faute du juge en droits québécois et belge
Bouhon, Frédéric ULiege; Lacroix, Mariève

in Les dynamiques de modernisation de la justice dans les pays du nord et du sud (2017)

L'article présenté dans le cadre du colloque de Casablanca est un résumé des travaux de droit comparé menés à propos de la question de la responsabilité civile pour la faute des juges dans l'exercice de ... [more ▼]

L'article présenté dans le cadre du colloque de Casablanca est un résumé des travaux de droit comparé menés à propos de la question de la responsabilité civile pour la faute des juges dans l'exercice de leur fonction, au Québec et en Belgique. [less ▲]

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See detailLA MESURE DE RELIQUAT AZOTÉ DANS LE SOL EN DÉBUT DE PÉRIODE DE LIXIVIATION (APL) : méthodologie et bilan après 12 années de contrôle des exploitations agricoles en Belgique (région wallonne)
Vandenberghe, Christophe ULiege; Colinet, Gilles ULiege; Khalidi, Mostafa et al

in Pin, Dominique; Thibault, Olivier (Eds.) DES TERRITOIRES À L’EUROPE : Construire ensemble les transitions environnementales (2017)

In 1991, the European Union enacted a “Nitrates” directive that each member state has had to translate into an action plan in its territory. One of the tools the Walloon region uses to control the ... [more ▼]

In 1991, the European Union enacted a “Nitrates” directive that each member state has had to translate into an action plan in its territory. One of the tools the Walloon region uses to control the implementation of this action programme is the measure of residual nitrogen in the soil at the beginning of the nitrate leaching period (Nitrogen Leaching Potential). From 2004 to 2007, this tool was used in a hundred-odd farms that had voluntarily requested an exemption from the maximum amount of spreadable farmyard manure. Since 2008, it can be used by the Walloon Administration in any farm located in a vulnerable area. [less ▲]

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See detailInfluence of hydrophobic treatments applications on the concrete carbonation delay
Courard, Luc ULiege

in De Schutter, Geert (Ed.) Proceedings RILEM PRO 107 (2017)

Water-repellents are increasingly used in the recent years. Those ones are generally used to reduce the degradation caused by freeze / thaw, by alkali-aggregates reaction or by chloride ions. The ... [more ▼]

Water-repellents are increasingly used in the recent years. Those ones are generally used to reduce the degradation caused by freeze / thaw, by alkali-aggregates reaction or by chloride ions. The objective of this study is to determine if hydrophobic treatments also have an influence on the propagation of the carbonation front into the concrete. Capillary absorption tests, permeability to water-vapor and oxygen, FTIR, DSC and porosity were carried out on concrete samples. Six products with different concentrations, solvent and molecules were tested. The results showed that the application of a water-repellent delays the propagation of the carbonation front. The most efficient products were the silanes which presented a higher penetration depth. Concrete compactness and porosity played also an important role in silane penetration depth. [less ▲]

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See detailQuelques observations sur la tenture de l’Histoire d’Hercule des Musées royaux d’Art et d’Histoire de Bruxelles
Laruelle, Anne-Sophie ULiege

in Actes du neuvième congrès de l'Association des Cercles francophones d'Histoire et d'Archéologie de Belgique (2017)

Depuis 1953, les Musées royaux d’Art et d’Histoire possèdent quatre tapisseries, illustrant autrefois une Histoire d’Hercule, tissées durant la seconde moitié du XVIe siècle dans l'atelier bruxellois de ... [more ▼]

Depuis 1953, les Musées royaux d’Art et d’Histoire possèdent quatre tapisseries, illustrant autrefois une Histoire d’Hercule, tissées durant la seconde moitié du XVIe siècle dans l'atelier bruxellois de Frans Schavaert. La découverte de quatre autres pièces, dispersées dans diverses collections privées, a permis à quelques spécialistes de reconsidérer la tenture dans son ensemble. L’objectif de cette communication est de réexaminer cette suite, encore trop souvent méconnue des chercheurs, qui constitue un bel exemple, toujours conservé en Belgique, du style Renaissance dans l’art de la tapisserie bruxelloise. Cette intervention consiste à revoir les aspects iconographique et stylistique de la tenture, à retracer la date du tissage, particulièrement à l’aide des bordures, et à fournir de nouvelles données sur l’œuvre du licier [less ▲]

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See detailIMPACT OF IMAGE BRIGHTNESS REDUCTION ON PERCEIVED QUALITY OF 3D EXPERIENCE FOR 3D CINEMA SPECTATORS
Loock, Severin; Grogna, David ULiege; Jaspar, Mathieu ULiege et al

in International Conference on 3D Imaging (IC3D) (2017)

3D movies are calibrated to meet a certain screen bright- ness standard. Therefore, what would be the consequences on the quality of the 3D experience for spectators watching a 3D movie when movie ... [more ▼]

3D movies are calibrated to meet a certain screen bright- ness standard. Therefore, what would be the consequences on the quality of the 3D experience for spectators watching a 3D movie when movie theaters do not respect this standard? First, we attempted to better understand which factors were important for a spectator by conducting an experiment where participants watched a 3D movie and filled out an exploratory questionnaire. Then, we aimed to investigate the link between image brightness loss and the quality of the 3D experience as perceived by the spectator. First results show no perceived difference in the quality of the 3D experience between a nor- mal brightness and a brightness decreased by 10% for four factors, i.e. (1) the appreciation of the movie, (2) the con- tent of the movie, (3) the 3D quality of the movie, and (4) the quality of the 3D experience in general. [less ▲]

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See detailContract farming application in the Vietnamese shrimp value chain
Thi Minh Ho, Hop; Burny, Philippe ULiege

in Petropoulos, D.; Kyriazopoulos, G. (Eds.) Conference proceedings of 2nd International Conference of Development & Economy (ICODECON) (2017)

Shrimp value chain in Vietnam functions with a large number of farmers. The stay in the weakest position in the chain due to their small individual scale with an average land of about 0.5 ha/farm, and low ... [more ▼]

Shrimp value chain in Vietnam functions with a large number of farmers. The stay in the weakest position in the chain due to their small individual scale with an average land of about 0.5 ha/farm, and low skills (Ho, 2012). As a leader and holding the strongest power in the shrimp value chain, the processors determine shrimp prices and set up requirements of shrimp quality and size in the market though quality control has not been completely implemented due to the limitations of financial capital, knowledge, awareness, as well as the quality of raw material supplied by collectors and farmers. In order to help the shrimp sector to work more efficiently, the Vietnamese government brought together shrimp farmers and plant processors through a farming contract. Two years after this application, the contract farming model failed due to the floor price mechanism, risk sharing, small scale of the model while there are excess suppliers in the market, administrative misconception and inefficient public management. As a result, farmers still stay at the weakest position and the shrimp sector could not improve its product safety to adapt to the requirement of import markets. The study results recommend necessarily a planning and projection of shrimp production zones, re-organizing shrimp farmers into legal teams or groups or coopératives to increase the size of the existing shrimp cultivation units in Vietnam. [less ▲]

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See detailAgent-based analysis of dynamic access ranges to the distribution network
Mathieu, Sébastien ULiege; Ernst, Damien ULiege; Cornélusse, Bertrand ULiege

in Proceedings of the 6th European Innovative Smart Grid Technologies (ISGT) (2017)

There is a need to clearly state an interaction model that formalizes interactions between actors of the distribution system exchanging flexibility. In previous works we quantitatively evaluated the ... [more ▼]

There is a need to clearly state an interaction model that formalizes interactions between actors of the distribution system exchanging flexibility. In previous works we quantitatively evaluated the performance of five interaction models devised with industrial partners using the agent-based testbed DSIMA. Simulation results showed that these interaction models relying on active network management suffer from a lack of coordination between the distribution and the transmission system operator, activating flexibility simultaneously in opposite directions. This paper introduces a new interaction model fixing this issue based on dynamic access bounds to the network changing throughout the day and preventing the activation of flexibility leading to congestions. This new interaction model is implemented in DSIMA and compared to a model restricting the grid users to a very restrictive but safe access range. Results show that this new model allows to safely increase by 55% the amount of distributed generation in the network. [less ▲]

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See detailMesure de la régularité et de la subversion métriques dans l'"Ode à la ligne 29 des autobus parisiens" de Jacques Roubaud
Purnelle, Gérald ULiege

in Magri-Mourgues, Véronique; Purnelle, Gérald (Eds.) Modèles et nombres en poésie (2017)

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See detailLes tables de discussion : une pratique d’évaluation formative par les pairs mise en place pour des étudiants de Master en Sciences de l’Éducation
Michel, Aurore ULiege; Baye, Ariane ULiege

in 29e Colloque de l'Admée Europe - L'évaluation : levier pour le développement professionnel et les apprentissages (Axe 4) (2017)

Cette communication exposera une pratique d’évaluation formative mutuelle proposée dans le cadre d’un cours sur les dispositifs pédagogiques de lutte contre le décrochage et l’exclusion adressé aux ... [more ▼]

Cette communication exposera une pratique d’évaluation formative mutuelle proposée dans le cadre d’un cours sur les dispositifs pédagogiques de lutte contre le décrochage et l’exclusion adressé aux étudiants de Master. Cette pratique vise à accompagner les étudiants dans la réalisation d’un travail de groupe ayant pour tâche d’analyser un dispositif pédagogique de lutte contre le décrochage. Pour les aider dans la réalisation, deux moments clés structurent l’accompagnement : une rencontre avec les encadrantes pour discuter et valider la démarche envisagée et des « tables de discussion » centrées sur l’évaluation formative mutuelle du travail collectif à produire (travail dit « intermédiaire » rédigé au plus près de la version finale attendue). L’objectif de ces tables pour chaque groupe est double : permettre de prendre de la distance par rapport à sa propre production écrite et de profiter du regard extérieur apporté par les autres groupes pour enrichir son propre travail. Les lectures d’autres rapports intermédiaires et le feedback apporté par chaque membre de la table de discussion sont en effet autant de nouvelles sources de réflexion. Ces nouveaux apports permettent notamment de clarifier l’attendu par rapport aux critères d’évaluation finaux et de retravailler le contenu (Mottier Lopez, 2015). Concrètement, chaque étudiant est amené à évaluer, par écrit, sur base d’une grille reprenant les critères et indicateurs d’évaluation du travail final, deux à trois travaux intermédiaires. Lors de cette phase de lecture, l’étudiant relève tant les éléments positifs que négatifs identifiés et formule, pour ces derniers, des pistes concrètes d’amélioration. Lors des tables de discussion, le timing est prévu de façon à octroyer à chaque groupe présent un temps égal d’échanges autour des lectures et évaluations formatives réalisées par chaque participant présent. La communication décrira le dispositif d’évaluation formative et présentera les données recueillies auprès des étudiants concernant l’utilité du dispositif. [less ▲]

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See detailContradictions autour de la (dé)légitimation de l'engagement corporel. Pratiques cynégétiques et naturalistes
Massart, Clémence ULiege

in Acte de colloque Atelier sur la contradiction (2017)

Une partition s’est opérée dans la gestion de l’environnement (en termes de domaine d’expertise et d’espaces dédiés) entre la nature remarquable, dont se préoccupe principalement le monde de la protection ... [more ▼]

Une partition s’est opérée dans la gestion de l’environnement (en termes de domaine d’expertise et d’espaces dédiés) entre la nature remarquable, dont se préoccupe principalement le monde de la protection de la nature (gestionnaires d’espaces protégés et associations de protection de la nature), et la nature ordinaire sur laquelle se focalise le monde de la chasse. Or, par leur mobilité et leur capacité à transgresser les frontières, les animaux interrogent parfois cette partition et parviennent à relier ces deux formes de nature et, avec elles, leurs experts. Dans le cas de la Réserve Naturelle Régionale (RNR) de Saint Bonnet, les sangliers, qui circulent entre l’espace protégé et sa périphérie, font émerger un problème commun à ces deux mondes a priori peu reliés. Comment se rencontrent les savoirs et les expertises de ces mondes ? La gestion du sanglier parvient-elle à provoquer des rapprochements entre les divers savoirs sur la nature, voire à induire leur articulation ? En répondant à ces questions, nous illustrerons trois types de « contradictions » qui se manifestent à l’échelle collective et individuelle. Nous montrerons d’abord que la confrontation de ces experts et expertises s’inscrit dans deux mouvements parallèles et potentiellement contradictoires autour de la production de connaissances sur la nature : l’émergence d’une tendance cosmopolitique, qui prend en compte d’une diversité de savoirs, et un mouvement de professionnalisation de certains acteurs de l’environnement. Le croisement de ces deux mouvements engendre ensuite des controverses qui révèlent différentes formes d’oppositions entre les expertises ancrées dans l’expérience et celles ancrées dans l’expérimentation. Enfin, ces oppositions révèlent elles-mêmes des contradictions dans les arguments et les pratiques de chaque acteur. [less ▲]

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See detailSpecification guidelines for surface preparation of concrete prior to repair
Courard, Luc ULiege; Bissonnette, Benoît; Garbacz, Andrzej

in High Tech Concrete: Where Technology and Engineering Meet (2017)

The repair of concrete requests specific preparation operations needed for guaranteeing compatibility between substrate and new materials as well as the development of adhesion properties. These ... [more ▼]

The repair of concrete requests specific preparation operations needed for guaranteeing compatibility between substrate and new materials as well as the development of adhesion properties. These specification guidelines contain design and construction recommendations for surface preparation of concrete for repair and overlay. The paper summarizes current knowledge, best practices and results of the research concerning the surface preparation of concrete prior to application of repair/overlay materials. The specifications are applicable to repairing damaged or deteriorated concrete structures, correcting design or construction deficiencies, or upgrading a structure for new uses, or to meet more restrictive code requirements. This is based on 10 years research activities on this topic through scientific cooperation programs between Wallonia, Quebec and Poland and support of American Concrete Institute. [less ▲]

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See detailFlowConvertor: Enabling Portability of SDN Applications
Pan, Heng; Xie, Gaogang; Li, Zhenyu et al

in IEEE INFOCOM 2017 (2017)

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See detail(Re)productive Traditions in Ancient Egypt. Some considerations with a particular focus on literature and language(s)
Winand, Jean ULiege

in Gillen, Todd (Ed.) (Re)productive Traditions in Ancient Egypt. (2017)

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See detailStability and Consistency of the LISP Pull Routing Architecture
Li, Yue; Saucez, Damien; Iannone, Luigi et al

in Proc. IEEE Workshop on Network Measurements (WNM) (2017)

Future Internet has been a hot topic for the last decade. One of the approaches put forward in order to revise the Internet architecture is LISP~--~Locator/ID Separation Protocol, which leverages the ... [more ▼]

Future Internet has been a hot topic for the last decade. One of the approaches put forward in order to revise the Internet architecture is LISP~--~Locator/ID Separation Protocol, which leverages the separation of the identifier and the locator roles of IP addresses. Contrary to the classical push model used by the BGP-based routing architecture, LISP relies on a pull model. In particular, routing information is pulled from a new network element, the Mapping System, to provide the association between the identifier (i.e., the address used to identify a host inside a domain) and a list of locators (i.e., the addresses to locate an attachment point) upon an explicit query. In this paper, we evaluate a LISP Mapping System deployment in the public LISP Beta Network from two standpoints: Stability and Consistency. Our measurements show that the mapping information is stable over time and consistent between the different mapping entities and the vantage points. Our analysis shows that there are cases where the Mapping System is unstable and/or inconsistent, hence, beside proposing a taxonomy in order to classify them, we carry out an in-depth investigation of such cases so to provide hints on how to improve the performance of LISP. [less ▲]

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See detailUrodynamic and morphometric characteristics of the lower urogenital tract in growing male Beagle littermates
Porato, Mathilde ULiege; Noël, Stéphanie ULiege; Bolen, Géraldine ULiege et al

in Congress of the European Veterinary Society for Small Animal Reproduction : Vienna, Austria June 29 - July 1, 2017 (2017)

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See detailA New Kingdom Case Study: the Artistic Copying Network Around Pahery of Elkab (EK 3)
Devillers, Alisée ULiege

in Miniaci, G.; Moreno Garcia, J. C.; Quirke, St. (Eds.) et al The Arts of Making in Ancient Egypt. Voices, Images, and Objects of Material Producers 2000–1550 BC (à paraître le 15.02.2018) (2017)

Through the case study of the artistic copying network around the tomb of Pahery in Elkab (EK 3), the paper aims at illustrating the circulation of knowledge via iconographic patterns in Ancient Egypt. As ... [more ▼]

Through the case study of the artistic copying network around the tomb of Pahery in Elkab (EK 3), the paper aims at illustrating the circulation of knowledge via iconographic patterns in Ancient Egypt. As will be underlined, this phenomenon is closely linked with the creativity process. After describing the different tombs related to EK 3, we will attempt to reach two artists’ individualities behind the iconographic programs of those funerary chapels. Finally, in order to create “analogy-bridges” which may provide food for thought for Egyptology, the productive copy process and the creativity notion will be briefly compared with the Western Renaissance context. [less ▲]

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See detailIdentifying Semitic loanwords in Late Egyptian
Winand, Jean ULiege

in Dils, Peter; Grossman, Eitan; Richter, Sebastian (Eds.) et al Greek Influence on Egyptian-Coptic: Contact-Induced Change in an Ancient African Language (2017)

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See detailZnaczenie informacji w ocenie poziomu wdrazania koncepcji zrównowazonego rozwoju w krajach Unii Europejskie (na podstawie wybranych wskaznikow
Burny, Philippe ULiege; Gazinsky, Benon

in INFO 2017 XI Konferencja z cyklu : informacja w spoleczenstwie XXI Wieku, Olsztyn, 21-22 czerwca 2017 r. (2017)

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See detailTradition and Creativity. Toward a Study of Intericonicity in Ancient Egyptian Art
Laboury, Dimitri ULiege

in Gillen, Todd (Ed.) (Re)productive Traditions in Ancient Egypt (2017)

Although a key-concept in Art historical discourse and reasoning, creativity has almost always been avoided as an issue in the discussion of Ancient Egyptian Art, as if the notion was simply irrelevant in ... [more ▼]

Although a key-concept in Art historical discourse and reasoning, creativity has almost always been avoided as an issue in the discussion of Ancient Egyptian Art, as if the notion was simply irrelevant in such a context. This surprising phenomenon has clearly deep roots in the history of the western vision of Ancient Egyptian Art (and civilization). Nonetheless, the investigation of some (actually quite rare) cases of true copies in Ancient Egyptian Art reveals that creativity operated within a process of reinterpretation of previous works and their tradition, a process that can be best described and analyzed, it seems, with the help of the conceptual frame of intericonicity (or interpictoriality). The paper also aims to defend the use of this notional tool in the analysis of Ancient Egyptian Art by attempting to define how creativity was conceived in Ancient Egyptian textual claims for innovation and originality [less ▲]

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See detailRule-based control and optimization of a hybrid solar microgrid for rural electrification and heat supply in sub-Saharan Africa
Altés Buch, Queralt ULiege; Orosz, Matthew; Quoilin, Sylvain ULiege et al

in Proceedings of the 30th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS) (2017)

This work aims at developing, optimizing and controlling a hybrid solar microgrid for rural electrification and heat supply in sub-Saharan Africa. The considered system includes PV panels, Parabolic ... [more ▼]

This work aims at developing, optimizing and controlling a hybrid solar microgrid for rural electrification and heat supply in sub-Saharan Africa. The considered system includes PV panels, Parabolic Trough Collectors, ORC and LPG generator, as well as battery and thermal energy storage. A special focus is paid to the co-optimization of the thermal and electrical load satisfaction since it can improve the overall energy efficiency of the system. To that end, different sub-component models are developed: - A building model to predict thermal loads of a health clinic in rural communities of Lesotho. - A microgrid model built by interconnecting the subcomponent models. - A rule-based control strategy, dispatching heat and electrical powers of each component to cover the demand while minimizing the fuel consumption. - A particle-swarm optimization of the microgrid under different cost assumptions. For the studied community of Ha Nkau in Lesotho, the determined optimal system infrastructure is composed of PV (66 kW) and batteries (262 kWh), and the optimum control strategy achieves a levelized cost of electricity of 0.203 USD/kWh. Fuel consumption is mainly due to the burner, which supplies most of the thermal load together with CSP (66 m2) and TES (86 kWh). [less ▲]

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See detailA Piano Key Weir to improve the discharge capacity of the Oule Dam spillway (France)
Erpicum, Sébastien ULiege; Archambeau, Pierre ULiege; Dewals, Benjamin ULiege et al

in Erpicum, Sébastien; Laugier, Frédéric; Ho Ta Khanh, Michel (Eds.) et al Labyrinth and Piano key weirs III - PKW 2017 (2017)

The Oule dam spillway (France) is made of a lateral weir on the right bank of the reservoir, a collecting channel, a macro-steps channel and a downstream lateral weir for water release in the natural ... [more ▼]

The Oule dam spillway (France) is made of a lateral weir on the right bank of the reservoir, a collecting channel, a macro-steps channel and a downstream lateral weir for water release in the natural river bed. This spillway presents a deficit in discharge capacity. In order to solve this problem, several rehabilitation solutions have been analyzed. From this process, a piano key weir solution to improve the discharge capacity of the lateral upstream weir has been selected. This piano key weir will replace the existing ogee crest while keeping weir level and thus normal reservoir elevation constant. The piano key weir, 1 m high, has been designed with steel and is made of 22.5 units for a total width of 33 m. Its main advantage is to drastically increase the discharge capacity at low heads, enabling the release of the design flood peak discharge just below the reservoir maximum elevation by optimizing the reservoir temporary storage. [less ▲]

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See detailHydraulics of Piano Key Weirs: A review
Erpicum, Sébastien ULiege; Archambeau, Pierre ULiege; Dewals, Benjamin ULiege et al

in Erpicum, Sébastien; Laugier, Frédéric; Ho Ta Khanh, Michel (Eds.) et al Labyrinth and Piano Key Weirs III - PKW 2017 (2017)

The Piano Key Weir (PKW) is a rectangular-labyrinth-type weir that utilizes cantilevered apexes in order to maximize the allowable weir length that can fit in a given spillway channel width, while ... [more ▼]

The Piano Key Weir (PKW) is a rectangular-labyrinth-type weir that utilizes cantilevered apexes in order to maximize the allowable weir length that can fit in a given spillway channel width, while reducing the required structural footprint. These features make it an interesting and viable solution for increasing discharge capacity at existing dams as well as new projects. Since the early works at the University of Biskra in 2000, numerous re-search and development works have been carried out in several laboratories to understand the PKW hydraulic behavior, optimize its design and prove its advantages and drawbacks. Beside, more than 25 PKWs are now in operation or under construction all over the world. This paper aims at summarizing the information available to date about PKW hydraulics in order to provide a synthetic overview and a reference list to students, researchers and practitioners and thus help them to understand how such a complex structure operates and what could be the possible further steps in research and development. [less ▲]

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See detailLa légation des Pays-Bas espagnols en cour de Rome au temps de l’agent Laurent du Blioul (1573-1598). Une légation au cœur des réseaux diplomatiques et politiques de la monarchie de Philippe II de Habsbourg
Regibeau, Julien ULiege

in Xhayet, Geneviève (Ed.) Neuvième congrès de l'Association des Cercles francophones d'Histoire et d'Archéologie de Belgique et LVIe congrès de la Fédération des Cercles d'Archéologie et d'Histoire de Belgique. Congrès de Liège, 23-26 août 2012 (2017)

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See detailExperimental investigation of the creep effect on prestressed bolts used in innovative friction connections
D'Antimo, Marina ULiege; Demonceau, Jean-François ULiege; Latour, Massimo et al

in Experimental investigation of the creep effect on prestressed bolts used in innovative friction connections (2017)

In the framework of a RFCS project entitled “FREEDAM -Free From Damage Connections”, innovative friction connections activated as dissipative zones in case of seismic actions are studied, with the ... [more ▼]

In the framework of a RFCS project entitled “FREEDAM -Free From Damage Connections”, innovative friction connections activated as dissipative zones in case of seismic actions are studied, with the objective to avoid any damage in the structures not only for frequent and occasional seismic events, but also for destructive earthquakes. These friction connections are made of stainless steel plates with specific coatings fastened with preloaded bolts placed in long slotted holes allowing significant displacement of the plates when the friction resistance is reached and so allowing significant dissipation of energy. As a partner of this project, The University of Liege is in charge of proposing analytical design procedures for these innovative joints and in particular of investigating the evolution of the prestressing in the bolts according to time, a key parameter when it is intended to dissipate energy through the activation of friction. This paper presents first preliminary results obtained through long term tests (5 months) performed on steel plates with particular coatings fastened with M20 Bolts. The main parameters registered during these tests were the relative displacements between the connected plates and the evolution of the prestressing in the bolts. The tests were performed according to EN 1090-2, in order to assess the loss of preloading over time and the creep of the plate. The final objective of the conducted studies is to propose a methodology to predict the prestressing loss in order to ensure that a minimum level of prestressing is kept over the full life of the structures, i.e. at least 50 years. [less ▲]

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See detailExtensive goat production systems in northern Morocco: production and use of pastoral resources
Chebli, Youssef ULiege; Chentouf, Mouad; Hornick, Jean-Luc ULiege et al

in Porqueddu, C; Franca, A; Lombardi, G (Eds.) et al Grassland resources for extensive farming systems in marginal lands: major drivers and future scenarios (2017)

Grazing is a Mediterranean tradition with an unvaried importance in northern Morocco. Rangeland has known profound changes, inducing a major gap between pastoral supply and demand. This study aimed to ... [more ▼]

Grazing is a Mediterranean tradition with an unvaried importance in northern Morocco. Rangeland has known profound changes, inducing a major gap between pastoral supply and demand. This study aimed to assess pastoral production of pastures at two sites in northern Morocco (Derdara and Loubar) and investigate their use by goats. Concerning biomass production, we used the method of the reference module. The surveys were realized during the biomass evaluation period. Pastoral species, mainly Arbutus unedo, Cistus monspeliensis, Erica arborea, Lavandula stoechas and Pistacia lentiscus, represent the most palatable species selected by goats. Grazing is practised throughout the year except during rainy days when breeders practice ‘cut and carry’ of the branches. The biomass produced was estimated at 1,455 and 333 kg dry matter ha‑1, respectively, in Derdara and Loubar. Significant differences were observed depending on the season and according to sampling sites. Furthermore, the research showed the appearance of degraded areas dominated by annual species together with species of low pastoral interest – thorny plant species that characterize degraded areas. Due to climate changes and overgrazing, pastoral resources will have availability and quality reduced. The reasonable use of pastures, including a reduction in grazing pressure, should be developed to insure their sustainability. [less ▲]

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See detailReden und Rufe, are they kingly patterns? A first step towards an explanation about the origin(s) of speech captions in "daily life" scenes in private tombs
Motte, Aurore ULiege

in Proceedings of the ICE XI, Florence, 23-30 August 2015 (2017)

Speech captions found in daily life scenes of private tombs, also named Reden und Rufe, are mostly known by the studies of Erman (1919), Montet (1925), and Guglielmi (1973). Yet, many questions have been ... [more ▼]

Speech captions found in daily life scenes of private tombs, also named Reden und Rufe, are mostly known by the studies of Erman (1919), Montet (1925), and Guglielmi (1973). Yet, many questions have been left unanswered: when, where, how did they appear? This paper aims at giving an overview of these issues. [less ▲]

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See detailMultiple Uses of a 3D Point Cloud: the Castle of Franchimont (Province of Liège, Belgium)
Luczfalvy Jancsó, Andrea ULiege; Jonlet, Benoît ULiege; Hallot, Pierre ULiege et al

in Hayes, James; Ouimet, Christian; Santana Quintero, Mario (Eds.) et al ISPRS - The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. 26th International CIPA Symposium – Digital Workflows for Heritage Conservation (2017)

This paper presents the identified obstacles, needs and selected solutions for the study of the medieval castle of Franchimont, located in the province of Liège (Belgium). After taking into account the ... [more ▼]

This paper presents the identified obstacles, needs and selected solutions for the study of the medieval castle of Franchimont, located in the province of Liège (Belgium). After taking into account the requirements from all the disciplines at work as well as the problems that would have to be tackled, the creation of a 3D point cloud was decided. This solution would be able to deal with the characteristics and needs of a research involving building archaeology and related fields. The decision was made in order to manage all of the available data and to provide a common working tool for every involved cultural heritage actor. To achieve this, the elaboration of an Archaeological Information System based on 3D point clouds as a common virtual workspace is being taken into consideration. [less ▲]

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See detailLe débat art-industrie dans la deuxième moitié du XIXème siècle en Belgique. Une analyse documentaire
Prina, Daniela ULiege

in Actes du Neuvième congrès de l'Association des Cercles francophones d'Histoire et d'Archéologie de Belgique - LVIe Congrès de la Fédération des Cercles d'Archéologie et d'Histoire de Belgique - Liège, 23-26 août 2012 (2017)

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See detailCharacterisation of clays from the Kinshasa region (D.R.Congo) used for manufacture of raw earth products
Mango-Itulamya, Lavie Arsène ULiege; Collin, Frédéric ULiege; Courtejoie, Fabienne ULiege et al

in Galindo, Alberto López (Ed.) Scientific Research Abstracts (2017)

This work aims at valorising these natural clay resources in another sector of construction which is the raw earth, and by this, defining them as a sustainable and energy-saving alternative.

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See detailLes « Annonciades » à Namur : première comparaison architecturale des « Rouges » et des « Célestes » installées au sein d’une même cité
Piront, Julie ULiege

in Actes du 9e Congrès de l'Association des Cercles francophones d'Histoire et d'Archéologie de Belgique (2017)

En 1502, les Annonciades sont fondées en France par Jeanne de Valois, épouse répudiée du roi de France, Louis XII. La règle franciscaine dicte le mode de vie de ces religieuses. Elles sont vêtues d’un ... [more ▼]

En 1502, les Annonciades sont fondées en France par Jeanne de Valois, épouse répudiée du roi de France, Louis XII. La règle franciscaine dicte le mode de vie de ces religieuses. Elles sont vêtues d’un scapulaire rouge enfilé sur une robe grise, avec une voile noir. Un couvent de ces Annonciades de France, dites « rouges », est fondé à Namur en 1623. Cent ans plus tard, l’ordre des Annonciades célestes apparaît en 1602 en Italie, créé par Vittoria Fornari, dame de la petite noblesse génoise. Puisant ses préceptes dans la règle de saint Augustin, il est alors connu sous le nom de « l’ordine della Santissima Annunziata » (en français, « l’ordre de la Très Sainte Annonciade »). Ces religieuses sont identifiables par la couleur de leur costume : un scapulaire et un manteau « bleu céleste », portés sur une robe blanche et un voile noir. L’ordre gagne rapidement la France puis la Belgique. Un couvent est établi à Namur en 1631. Ces deux communautés revendiquaient donc le nom d’« Annonciades » et se côtoyèrent parfois dans une même ville. Ce fut le cas à Namur où elles s’établirent toutes les deux en moins d’une décennie. Ces circonstances offrent des dénominateurs communs pour permettre une comparaison architecturale inédite de ces deux établissements. Si le couvent des Annonciades célestes demeure partiellement conservé, celui des Annonciades rouges a disparu. Néanmoins, les sources archivistiques et iconographiques permettront de documenter l’analyse du plan de ces deux édifices ainsi que des matériaux de construction. Si le lieu d’implantation de ces bâtiments influencera probablement les techniques de construction, les différences entre les deux règles surgiront peut-être dans le plan de l’édifice. [less ▲]

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See detailMonitoring des vols de cécidomyie orange du blé, Sitodiplosis mosellana (Géhin), et de cécidomyie équestre, Haplodiplosis marginata (von Roser), à l'aide de pièges à phéromone
Chavalle, Sandrine ULiege; Laurent, Pascal; De Proft, Michel

in AFPP - 11ème Conférence Internationale sur les Ravageurs et Auxiliaire en Agriculture (2017)

En Belgique, deux cécidomyies occasionnent couramment des dégâts en céréales : la cécidomyie orange du blé, Sitodiplosis mosellana, et la cécidomyie équestre, Haplodiplosis marginata. Afin d’évaluer le ... [more ▼]

En Belgique, deux cécidomyies occasionnent couramment des dégâts en céréales : la cécidomyie orange du blé, Sitodiplosis mosellana, et la cécidomyie équestre, Haplodiplosis marginata. Afin d’évaluer le risque pour la culture et de déterminer la pertinence d’un éventuel traitement insecticide, un monitoring fiable des vols et une bonne interprétation des profils de captures sont nécessaires. Différents pièges de S. mosellana et d’H. marginata ont été placés dans différents champs sources et cultivés, soit en céréales, soit en cultures de printemps. Chaque cécidomyie a été abondamment capturée par les pièges pourvus de sa propre phéromone, et ce quel que soit le type de champ pour S. mosellana, contrairement à H. marginata où seuls les pièges à phéromone disposés en céréale ont eu une bonne efficacité. Les pièges combinant les deux phéromones ont montré que la phéromone d’H. marginata a un effet répulsif sur S. mosellana. Pour un monitoring efficace, les pièges combinés ne sont pas efficace et la localisation idéale des pièges à phéromone diffère donc selon l’espèce. [less ▲]

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See detailMultisensor and multitemporal satellite observations of surface circulation in the Western Mediterranean
Karimova, Svetlana ULiege

in Proc. 4th Int. Conf. Applied Aspects of Geology, Geophysics, and Geoecology (2017)

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See detailEffect of the method and the period of oil extraction on in vitro digestibility of olive cake in northern of Morocco
El Otmani, Samira ULiege; Ayadi, Mohamed; Chentouf, Mouad et al

in Proceedings of the 4th FARAH-Day (2017)

In Northern Morocco, goat population is the most dominant livestock. His feeding is based on forest rangelands and characterized by strong seasonal variability responsible of low productivity. Therefore ... [more ▼]

In Northern Morocco, goat population is the most dominant livestock. His feeding is based on forest rangelands and characterized by strong seasonal variability responsible of low productivity. Therefore, it is necessary to diversify and improve its diet. Olive cake is an oil extraction by-product that is widely available and can be a ruminant feed. Olive cake is produced by three methods and for limited period. This work aims to determine the effect of oil extraction method and period on digestibility of olive cake. Twenty-seven samples were collected from 3 mills by each extraction method (mechanical pressure, centrifugation 2 and 3 phases) during three periods (November, December and January). In vitro digestibility was performed using gas production method of (Menke et al., 1979) improved by Menke and Steingass (1988). Samples were incubated in glass syringes that contained rumen fluid and incubation solution that conserved in water bath in 39°C during 72 hours. Gas production was recorded after 2, 4, 8, 12, 24, 48 and 72 hours. Studied digestibility parameters were dry and organic matter digestibility, microbial biomass production, partitioning factor and volatile fatty acid. Extraction method affected digestion kinetics and the digestibility parameters except partition factor and volatile fatty acids. Olive cake obtained by 2 phases method had the highest digestibility. For extraction period, gas production decreased significantly per period. Period had no effect on digestibility parameters except for volatile fatty acids. Two phases olive cake is most suitable for feed but has a reduced shelf life, which requires the development of a suitable conservation mode. [less ▲]

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See detailApplying the Dispa-SET model on the Western Balkans power systems
Pavičević, Matija; Tomić, Ivan; Quoilin, Sylvain ULiege et al

in Proceedings of the 2017 SDEWES Conference (2017)

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See detailRolling reefs in the Late Devonian of Belgium
Denayer, Julien ULiege

in 33rd International Meeting of Sedimentology - 16ème Cngrès français de sédimentologie : Abstract book (2017)

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See detailGoat grazing in northern Morocco: problem or solution?
Chebli, Youssef ULiege; Chentouf, Mouad; Hornick, Jean-Luc ULiege et al

in Proceedings of the 4th FARAH-Day (2017)

In northern Morocco, silvopastoral areas are characterized by pastoral activities, and the goats find some or all their feed rations. Overgrazing is listed as a main factor of silvopastoral degradation by ... [more ▼]

In northern Morocco, silvopastoral areas are characterized by pastoral activities, and the goats find some or all their feed rations. Overgrazing is listed as a main factor of silvopastoral degradation by local authority and several authors. Goat cannot only be regarded as a problem for silvopastoral ecosystems. A survey, with local population and local authority, were conducted in several rural communes of northern Morocco, to understand the actual factors of silvopastoral degradation. According to all interviewed persons: agriculture development, authority policy, cannabis cultivation, deforestation, drought, fire, overgrazing, population growth and soil erosion are the most cited drivers of silvopastoral degradation. Local population and local authority have the same perception that soil erosion, drought, fire and population growth are factors of silvopastoral degradation. Goat grazing can be considerate as a solution and not just a problem. In some forest areas, goat grazing contributes to a reduction of burned areas by elimination of inflammable shrubs. Herd mobility, as an ecological rationality, is considered as a response to unexpected variability in pasture production and/or animal nutritional needs. Despite all forms of degradation, silvopastoral areas in northern Morocco continue to play a support of all livestock activities, considered an inevitable source of goats feeding. [less ▲]

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See detailFire resistance of axially restrained and partially unprotected Ultra Shallow Floor Beams (USFB®) and DELTABEAM® composite beams
Maraveas, Chrysanthos ULiege; Fasoulakis, Zacharias; Tsavdaridis, Konstantinos

in Applications of Structural Fire Engineering (2017)

Ultra-shallow floor types such as the USFB® and DELTABEAM® beam ‘plug’ composite flooring systems are recently developed and have seen many applications in contemporary construction. They involve ... [more ▼]

Ultra-shallow floor types such as the USFB® and DELTABEAM® beam ‘plug’ composite flooring systems are recently developed and have seen many applications in contemporary construction. They involve partially encased steel beams in concrete, with the lower flange remaining exposed. Besides the satisfactory behavior of the system at ambient conditions, understanding their response to elevated temperatures is critical in evaluating their overall performance. Previous numerical studies of the authors have investigated their fire resistance when simply supported. The computational analyses demonstrated that such flooring systems are experiencing severe thermal gradients and bowing. When such beams are axially restrained, the compression due to the restraining may produce second order effects on the bowed beams. On the other hand, the effect of axial restraints is difficult to be estimated because of the temperature’s non-uniformity across the cross-sections. For this reason, comprehensive finite element analyses (FEA) were implemented in this paper to simulate the response of such restrained beams subjected to fire. Material properties were modelled according to Eurocodes. The coupled thermal-structural parametric analyses involved different variations of the “shortest” cross-sections. From the FE analyses, useful conclusions are drawn. [less ▲]

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See detailUtiliser les potentialités phénoménotechniques de la Théorie Anthropologique du Didactique : quel prix payer ?
Schneider-Gilot, Marguerite ULiege

in cirade, Gisèle (Ed.) Évolutions contemporaines du rapport aux mathématiques et aux autres savoirs à l’école et dans la société. (2017)

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See detailSe faire « manger par l’autre ». Stratégie féminines d’affirmation de soi dans un contexte migratoire
Mescoli, Elsa ULiege

in Ben Khalifa, Riadh (Ed.) Etrangers au Maghreb. Maghrébins à l’étranger : politiques publiques à l’épreuve de la société civile : XIXe-XXIe siècles. Actes du colloque. (2017)

Cette communication vise à étudier la participation des femmes migrantes marocaines à la vie sociale du « pays d’accueil » ; participation qui se réalise grâce aux activités de la vie quotidienne. En ... [more ▼]

Cette communication vise à étudier la participation des femmes migrantes marocaines à la vie sociale du « pays d’accueil » ; participation qui se réalise grâce aux activités de la vie quotidienne. En particulier, la performance publique des pratiques culinaires, observée dans une ville de la province de Milan, permet aux femmes considérées d’exercer une agency à l’intérieur des espaces institutionnellement concédés à l’expression des migrants. D’un côté, la consommation des « recettes de l’Autre » de la part de la population majoritaire détermine une incorporation de la diversité afin de la contrôler. De l’autre côté, la préparation de ces recettes consent aux migrantes d’exprimer leur subjectivité (individuelle et collective) de façon active et en présentant des aspects qui vont au-delà de la culture alimentaire. Une participation sociale fondée sur le partage de nourriture donne la possibilité aux femmes d’assumer un rôle actif dans la communauté locale, tout en affirmant ses propres spécificités. Des sujets tels que la liberté religieuse sont abordés, et certains droits peuvent être réclamés par des individus qui ont ainsi acquis une position politiquement importante au sein de la société locale. [less ▲]

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See detailRÉSULTATS EXPERIMENTAUX ET MODÉLISATION DYNAMIQUE D’UNE POMPE À CHALEUR AIR-EAU UTILISANT UN COMPRESSEUR SPIRO-ORBITAL À VITESSE VARIABLE ET INJECTION DE VAPEUR
Dechesne, Bertrand ULiege; Gendebien, Samuel ULiege; Lemort, Vincent ULiege et al

in CIFQ 2017 proceedings (2017)

Cet article présente les résultats expérimentaux d’une campagne de tests et le modèle de simulation dynamique d’une pompe à chaleur résidentielle air-eau fonctionnant avec un compresseur spiro-orbital (« ... [more ▼]

Cet article présente les résultats expérimentaux d’une campagne de tests et le modèle de simulation dynamique d’une pompe à chaleur résidentielle air-eau fonctionnant avec un compresseur spiro-orbital (« scroll ») à vitesse variable et injection de vapeur. Il s’agit d’un système résidentiel de 10kW fonctionnant avec du R410a comme fluide de travail, et capable d’alimenter un système de chauffage et de produire de l'eau chaude sanitaire. Les performances du système à charge partielle, le contrôle de la surchauffe ainsi que la validation en régime étable du modèle de simulation sont présentés. [less ▲]

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See detailLes chapiteaux des parties orientales de la collégiale Notre-Dame à Dinant
Baudry, Antoine ULiege

in Actes des Neuvième congrès de l'association des cercles francophones d'histoire et d'archéologique de Belgique et LVIe congrès de la fédération des cercles d'archéologie et d'histoire de Belgique (2017)

Etude exhaustive du décor monumental des parties orientales de l'ancienne collégiale Notre-Dame à Dinant, couvrant la période 1150-1250.

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See detailLa tradition textuelle de la Continuation du ‘Roman de Guiron’
Veneziale, Marco ULiege

in Duval, Frédéric; Leonardi, Lino; Trachsler, Richard (Eds.) Congrès international de linguistique et de philologie romanes (Nancy, 15-20 juillet 2013). Section 13 : Philologie textuelle et éditoriale (2017)

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