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See detailExperimental Correction of Radiation Patterns Between Electromagnetic Environments
Spirlet, Maxime ULg; Geuzaine; Beauvois

in IEEE Transactions on Antennas & Propagation (2017), 65(03),

This manuscript presents an experimental method to estimate a radiation pattern obtained in a particular echoic environment (for example from in-situ measurements) as if measurements were performed in a ... [more ▼]

This manuscript presents an experimental method to estimate a radiation pattern obtained in a particular echoic environment (for example from in-situ measurements) as if measurements were performed in a given anechoic chamber. The correction is achieved using some reference measurements collected both in echoic and anechoic environments. An angular transfer function is estimated from these two sets of measurements and deconvolved from the measured radiation pattern to be corrected. [less ▲]

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See detailConstraining the efficiency of angular momentum transport with asteroseismology of red giants: the effect of stellar mass
Eggenberger, P.; Lagarde, N.; Miglio, A. et al

in Astronomy and Astrophysics (2017), 599

Context: Constraints on the internal rotation of red giants are now available thanks to asteroseismic observations. Preliminary comparisons with rotating stellar models indicate that an undetermined ... [more ▼]

Context: Constraints on the internal rotation of red giants are now available thanks to asteroseismic observations. Preliminary comparisons with rotating stellar models indicate that an undetermined additional process for the internal transport of angular momentum is required in addition to purely hydrodynamic processes. Aims: We investigate how asteroseismic measurements of red giants can help us characterize the additional transport mechanism. Methods: We first determine the efficiency of the missing transport mechanism for the low-mass red giant KIC 7341231 by computing rotating models that include an additional viscosity corresponding to this process. We then discuss the change in the efficiency of this transport of angular momentum with the mass, metallicity and evolutionary stage. Results: In the case of the low-mass red giant KIC 7341231, we find that the viscosity corresponding to the additional mechanism is constrained to the range 1 x 10^3 - 1.3 x 10^4 cm^2/s. This constraint on the efficiency of the unknown additional transport mechanism during the post-main sequence is obtained independently of any specific assumption about the modelling of rotational effects during the pre-main sequence and the main sequence (in particular, the braking of the surface by magnetized winds and the efficiency of the internal transport of angular momentum before the post-main-sequence phase). When we assume that the additional transport mechanism is at work during the whole evolution of the star together with a solar-calibrated braking of the surface by magnetized winds, the range of nu_add is reduced to 1 - 4 x 10^3 cm^2/s. In addition to being sensitive to the evolutionary stage of the star, we show that the efficiency of the unknown process for internal transport of angular momentum increases with the stellar mass. [less ▲]

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See detailEU competition law
Van Cleynenbreugel, Pieter ULg

in Ugirashebuja, Emmanuel; Ruhangisa, John Eures; Ottervanger, Tom (Eds.) et al East African Community Law: institutional, substantive and comparative EU aspects (2017)

This chapter provides an overview of the principles of EU competition law, its relationship to EU internal market law and the similarities and differences between this body of law and East African ... [more ▼]

This chapter provides an overview of the principles of EU competition law, its relationship to EU internal market law and the similarities and differences between this body of law and East African competition law. [less ▲]

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See detailLocal Identification of Voltage Instability from Load Tap Changer Response
Weckesser, Johannes ULg; Papangelis, Lampros ULg; Vournas, Costas et al

in Sustainable Energy, Grids and Networks (2017)

This paper presents a local long-term voltage instability monitoring method, which is suitable for on-line applications. The proposed extended-time Local Identification of Voltage Emergency Situations ... [more ▼]

This paper presents a local long-term voltage instability monitoring method, which is suitable for on-line applications. The proposed extended-time Local Identification of Voltage Emergency Situations (eLIVES) method is a significantly modified version of the previously presented LIVES method. The new method is not bound to assessing system response over a predefined LTC tapping period. This allows handling LTCs with variable delays, as well as events taking place during the tapping sequence impacting the distribution voltages. For that purpose, eLIVES applies recursive least square fitting to acquired distribution voltage measurements and a new set of rules to detect a voltage emergency situation. The effectiveness of the eLIVES method is presented on the IEEE Nordic test system for voltage stability and security assessment. [less ▲]

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See detailThermal comfort models for net zero energy buildings in hot climates
Belkhouane, Hamza ULg; Hensen, Jan; Attia, Shady ULg

in Second International Conference on Energy and Indoor Environment for Hot Climates (2017, February 26)

Several energy efficiency concepts and comfort models emerged in the last 15 years seeking high performance buildings and optimal occupant comfort conditions. The aim of high performance buildings is to ... [more ▼]

Several energy efficiency concepts and comfort models emerged in the last 15 years seeking high performance buildings and optimal occupant comfort conditions. The aim of high performance buildings is to reduce the carbon footprint and energy consumption of buildings while maintain a fit to purpose comfort. In this context, this work raises the question of fir to purpose comfort models that can from one side reduce the energy consumption of typical office buildings in hot climates (cooling dominated) while on the other side ensuring indoor thermal comfort. Indeed, studies that address energy efficiency are many, however it is in most cases applied to temperate or cold climates and barely explored for hot climates. The objective of this paper is to (1) combine several comfort models for a net zero energy building in hot climates, (2) select the comfort model that shows the optimal comfort quality of indoor environment and (3) compare the building's annual energy consumption for each used comfort model. To respond to our research problems, a methodology has been established, which goes through several phases. First identifying the different comfort models comfortable to use in hot climates (ISO 7730 / EN 15251 / adaptive ASHRAE / Givoni), secondly selecting a typical validated office building model as a reference building and finally selecting representative cities in the Mediterranean arid and hot climate (Algiers / Sicily / Cairo / Dubai). The study used building performance simulation to generate the different results on the energy consumption and the operative temperatures of the different models of comfort in each city. The paper ultimately identifies the fit to purpose comfort models for a medium size net zero energy office building in hot climates. The paper presents a comparison that can help building professional to identify the most appropriate comfort model that allows optimizing energy consumption, ensuring thermal comfort for robust perfromnce of net zero energy buildings in hot climates. [less ▲]

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See detailI Am Very Sorry Sir! Breaking Bad News to Customers
Delcourt, Cécile ULg; Gremler, Dwayne; Greer, Dominique

Scientific conference (2017, February 25)

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See detailGenscript meeting invited by GIGA viral vector platform
Golestan Hashemi, Farahnaz Sadat ULg

Learning material (2017)

Detailed reference viewed: 11 (0 ULg)
See detailCompréhension et prise en charge de la schizophrénie : Présentation du modèle « 3Id »
Englebert, Jérôme ULg

Scientific conference (2017, February 24)

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See detailComment le changement climatique influence-t-il la croissance du hêtre (Fagus sylvatica L.) le long du gradient bioclimatique de la Belgique ? Une approche dendroécologique.
Latte, Nicolas ULg

Doctoral thesis (2017)

Health anomalies (e.g., worsening crown conditions) on beech (Fagus sylvatica L.) observed throughout Europe since the 1990s have raised growing concerns among foresters, particularly about the future ... [more ▼]

Health anomalies (e.g., worsening crown conditions) on beech (Fagus sylvatica L.) observed throughout Europe since the 1990s have raised growing concerns among foresters, particularly about the future behavior of the species in the face of climate change. This PhD research examined the relationship between beech and its environment in the context of global changes using dendroecology, combination of dendrochronology and forest ecology. The radial growth was used to evaluate the effects of global changes, particularly climate change, on beech development and vitality over time along a bioclimatic gradient in Belgium. Various analyses were carried out using dendrochronological tools (pointer years, mean sensitivity, growth-climate correlation, etc.) and modeling approaches (linear and non-linear mixed models, partial least squares regression, etc.) considering several scales: tree, stand and region. Results show that climate predominantly influenced beech growth since the mid-20th century and did so rather uniformly across Belgium. Beech mean sensitivity increased mainly in response to the higher frequency and intensity of summer heat waves and spring droughts. Isolated but pronounced annual growth reductions induced a gradual diminution of mean growth. The increasing influence of climate progressively concealed the effect of local site growing conditions inducing strong between-sites synchronization along the bioclimatic gradient. Increasing mean sensitivity and decreasing mean growth were more pronounced in lowlands than in uplands, and for a given site, older trees are more affected than younger ones. Although mean sensitivity increases and mean growth decreases naturally with age, the climate change effect was much more important than the age effect. Furthermore, within a tree, along the main stem, climate sensitivity slightly decreased from breast height to crown base and strongly increased from crown base to tree top. These results were interpreted based on ecophysiological knowledge of beech. The influences of silviculture, soil compaction and nitrogen deposition (as part of atmospheric pollution) as well as the consequences of the past and future climate change on beech were discussed. Comparisons with other studies in Europe highlighted that beech is affected on a large part of its natural distribution range (except in high altitude and high latitude). Contrary to what one might think, beech is not only affected in the southern limit (Mediterranean). Although growing conditions are more favorable in Belgium, beech has also more to lose. Beech has coped with global change up to now. Although its climate sensitivity increased and its mean growth decreased, diebacks observed these last years in Belgium were scarce and generally scattered. However, considering the upcoming climate change, the phytosanitary risk will undeniable increased. Forest policy should now integrate that risk and prepare managers to anticipate and prevent it. [less ▲]

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See detailTroubles de la Régulation du Traitement sensoriel
SCHOLL, Jean-Marc ULg

Conference given outside the academic context (2017)

Actuellement, peu de médecins et de psychologues connaissent les « Troubles de la Régulation Sensorielle ». Or, chez le petit enfant, ils peuvent fortement influencer sa psychologie, ses comportements et ... [more ▼]

Actuellement, peu de médecins et de psychologues connaissent les « Troubles de la Régulation Sensorielle ». Or, chez le petit enfant, ils peuvent fortement influencer sa psychologie, ses comportements et altérer son fonctionnement. Ces difficultés peuvent demeurer chez l’adulte et interférer sur son fonctionnement quotidien. Ainsi, il est utile de former le réseau des professionnels, particulièrement le réseau de la santé mentale de l’enfance et le réseau des crèches et de l’enseignement maternel. Le diagnostic d'un Trouble de la Régulation du traitement Sensoriel est réalisé à partir de l'anamnèse et de la description de l'enfant dans ses différents milieux de vie. Afin de réaliser un dépistage, cette présentation donne une sémiologie précise permettant de reconnaître les signes et symptômes chez l'enfant et chez l'adulte. Il est également utile de systématiquement rechercher s'il n'y a pas d'autres difficultés et comorbidités s'ajoutant à ce premier diagnostic. Le module de formation ici présenté donne divers points de repères : I. Données générales : 1) Prévalence 2) Enjeu de santé publique 3) Vignette Clément 4) Vignette Aude 5) Voies d’entrée des stimuli sensoriels 6) Traitement central de l’information 7) Régulation sensorielle 8) Altération du développement de l’enfant II. Du dépistage au diagnostic : 1) Dépistage et diagnostic 2) Dépistage : hyper- /hypo-sensibilités 3) Dépistage : Exemples d’hypersensibilités 4) Dépistage : Exemples d’hyposensibilités [less ▲]

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See detailCluster growth in driven granular gases
Noirhomme, Martial ULg; Ludewig, François; Vandewalle, Nicolas ULg et al

in Physical Review. E : Statistical, Nonlinear, and Soft Matter Physics (2017)

We investigate numerically and theoretically the internal structures of a driven granular gas in cuboidal cell geometries. Clustering is reported and particles are classified as gaseous or clustered via a ... [more ▼]

We investigate numerically and theoretically the internal structures of a driven granular gas in cuboidal cell geometries. Clustering is reported and particles are classified as gaseous or clustered via a local packing fraction criterion based on a Voronoi tessellation. We observe that small clusters arise in the corners of the box, elucidating early reports of partial clustering. These aggregates have a condensation-like surface growth. When a critical size is reached, a structural transition occurs and all clusters merge together, leaving a hole in the center of the cell. This hole then becomes the new center of particle capture. Taking into account all structural modifications and defining a saturation packing fraction, we propose an empirical model for the cluster growth. [less ▲]

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See detailFanfictions, blogs, web-poetry et jeux vidéo
Dupont, Bruno ULg; Barnabé, Fanny ULg

Scientific conference (2017, February 23)

Comment s'élaborent les cultures des fans ? Quels rapports se créent entre auteur et lecteur-créateur ? Quels sont les enjeux de ces cultures participatives et pourquoi est-il intéressant de les étudier ... [more ▼]

Comment s'élaborent les cultures des fans ? Quels rapports se créent entre auteur et lecteur-créateur ? Quels sont les enjeux de ces cultures participatives et pourquoi est-il intéressant de les étudier aujourd'hui ? [less ▲]

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See detailTre segnalazioni su Sciascia. Città, solitudini, saggismo e invenzione.
Curreri, Luciano ULg

Article for general public (2017)

Detailed reference viewed: 12 (1 ULg)
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See detail888 Tweets on the Art and Science of Internet-Based Investing
Choffray, Jean-Marie ULg

E-print/Working paper (2017)

Here we are! 888 Tweets on The Art and Science of Investing to “show you the way”, to share some observations on the evolution of the world, the behavior of the financial markets, and to illustrate the ... [more ▼]

Here we are! 888 Tweets on The Art and Science of Investing to “show you the way”, to share some observations on the evolution of the world, the behavior of the financial markets, and to illustrate the key heuristics that I learned over the last twenty years. As, without any doubt, I am no Warren Buffett, feel free to disagree and develop you own “theory” of investing. Painful and solitary work... Success is at that price! And, based on what I did - and did not! - achieve, it shouldn’t be hard to do much better... That’s my wish for you! [less ▲]

Detailed reference viewed: 307 (70 ULg)