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See detailLes méthodes de prise en charge et de rééducation cognitives
DELRUE, Gaël ULg

Conference (2015, April 25)

Présentation des méthodes de prise en charge neurocognitives de patients traumatisés crâniens légers.

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See detailRetour au travail après un cancer du sein
Mairiaux, Philippe ULg; Schippers, Nathalie ULg; DESREUX, Joëlle ULg et al

Conference (2015, April 23)

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See detailDocuments officiels romains d’époque républicaine et du Principat d’Auguste
Famerie, Etienne ULg

Conference (2015, April 23)

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See detailDoctors, Nurses and Patients 2.0: Myth or Reality?
Slomian, Cynthia ULg

Conference (2015, April 21)

This communication aims at drawing the general context underlying the Belgian health care sector and to address the key issues of the computerization of the patient health records. Two case studies are ... [more ▼]

This communication aims at drawing the general context underlying the Belgian health care sector and to address the key issues of the computerization of the patient health records. Two case studies are presented: the introduction of a nursing health record within a hospital and the computerization of the general practitioner's record. Finally, the discussion focuses on the medical knowledge in general, using the embodied, inscribed, enacted phenomenology developed by Richard Freeman and Steven Sturdy. [less ▲]

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See detailBrazil’s South South Cooperation with Africa : a win win Relationship ? The case of biofuel production in Mozambique
Cusson, Gabrielle ULg

Conference (2015, April 18)

Since Lula’s presidency, South-South development cooperation (SSDC) has been at the heart of Brazil foreign policy priorities. Brazil is now recognized as an emerging actor in international development ... [more ▼]

Since Lula’s presidency, South-South development cooperation (SSDC) has been at the heart of Brazil foreign policy priorities. Brazil is now recognized as an emerging actor in international development cooperation considering its financial investments and the deployment of its many technical cooperation projects. Despite its cooperation in its own region, Brazil mobilizes a considerable amount of resources towards SSDC in Africa, and especially in Portuguese speaking countries, where it develops a “solidarity diplomacy”. Among the many technical cooperation partnerships, two fields of SSDS are considered as priorities for Brazil in Africa; agriculture and biofuels production. Being one of the world most important agricultural producer and exporter and due to the fast growing of its agribusiness industry, Brazil possess a specific expertise he wishes to share with Africa to support its agricultural revolution and to insure its food and energy security. Therefore, Mozambique has been identified as a privileged partner to develop agricultural projects, including biofuels production. Among others, ProSAVANA, a trilateral cooperation project developed in collaboration with Japan, is a very important, but controversial project. Being an emerging country, Brazil has its own strategic, political and commercial interests. Therefore, it is relevant to ask ourselves if an emerging country can deploy a selfless SSDC policy and establish a win win relationship? Is Brazil’s SSDC policy motivated by principles of solidarity or is more of a tool to consolidate its status as a global power? This papers wishes to analyses the real motivations behind Brazil’s SSDC towards Africa. [less ▲]

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See detailThermodynamik und Reaktions-Technik am Beispiel PA12
Pfennig, Andreas ULg; Haas, Thomas

Conference (2015, April 18)

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See detailBasement depth and sedimentary infill from deep seismic reflection data at the western tip of the offshore Corinth Rift
Beckers, Arnaud ULg; Tripsanas, Efthymios; Hubert, Aurelia ULg et al

Conference (2015, April 17)

The Corinth rift is a young continental rift located in central Greece. The active part of the rift forms an E-W striking depression – the Gulf of Corinth – that is the deepest in its central part ... [more ▼]

The Corinth rift is a young continental rift located in central Greece. The active part of the rift forms an E-W striking depression – the Gulf of Corinth – that is the deepest in its central part. Extensive seismic surveys have imaged the basin's basement and allowed to estimate the total extension across most of the Gulf except its western tip. Extension is high in the central part and decreases westward and eastward, as reflected in the present-day bathymetry. Two decades of GPS measurements have shown that the extension rate increases westwards from ~5 to 10-15 mm yr-1, but this is not consistent with the long term pattern. However, no data allowed so far to estimate the basement depth at the western tip of the Gulf, where the geodetic extension rate is the largest. Such data would allow to check the apparent inconsistency between the present rate and the long-term estimates of crustal extension. We present here an unpublished multichannel seismic line dating from 1979 and crossing the western tip of the Gulf of Corinth. The line is 22 km long and strikes WNW-ESE, from the Mornos delta to the West-Channel fault. A Maxipulse source has been used, allowing to image the basement below the synrift sedimentary infill. To the east, a ~1.6 km deep basin is imaged between the southern margin of the Gulf and an inactive south-dipping fault located between the Aigion and the Trizonia faults. The sedimentary infill consists in an alternation between basin-focused bodies made of incoherent reflections and more extensive high-amplitude reflectors. Attributing this alternation to eustatic variations give an age of 300-350 ka to the oldest well imaged deposits. Northwest of the Trizonia fault, the basement is imaged at shallower depth, i.e. ~450 m. The western tip of the seismic line reaches the Mornos delta, close to the northern shoreline. There, the depth to the basement is larger, reaching ~1.2 km. The infill is made of 3 units : on the basement lies a thin unit of incoherent reflections that may corresponds to coarse-grained fluvial deposits. A second unit of parallel, high-amplitude, low-frequency reflections could represent deeper-water deposits. The last seismic unit represents the Mornos delta coarse-grained deposits, from 0 to ~0.7 km deep. The depth of the basement deduced from this seismic line at the western tip of the Gulf of Corinth (1.2-1.6 km) is shallower than the one in the central part of the Gulf (2.5-3 km). This reinforce the inconsistency between long-term and short-term rates of extension in the Corinth Rift, which may be explained by assuming that the Western Corinth Rift initiated much later than the Central Rift. These data also allow to constrain the total displacement on the N-dipping Psathopyrgos fault, one of the major, normal, basin-bounding faults at the western tip of the Rift. The total offset would reach 2.1-2.3 km and the uplift/subsidence ratio would be ~1:1.7, implying a slip rate of 2.2-2.5 mm yr-1 based on footwall uplift rate data. [less ▲]

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See detailLire les textes informatifs au début du secondaire : d’un dispositif didactique à l’étude de l’activité des élèves et à l’accompagnement du travail d’appropriation/transformation des enseignants
De Croix, Séverine ULg; Wyns, Marielle

Conference (2015, April 17)

Notre intervention s’appuie sur les premières données issues d’une recherche de type quasi expérimental , subventionnée par la Fondation Louvain (UCL – Louvain-la-Neuve), qui porte sur l’enseignement ... [more ▼]

Notre intervention s’appuie sur les premières données issues d’une recherche de type quasi expérimental , subventionnée par la Fondation Louvain (UCL – Louvain-la-Neuve), qui porte sur l’enseignement, dans l’ordinaire de la classe, des pratiques de lecture et d’écriture des textes informatifs requises pour réussir à l’école (Bautier et Rayou, 2009 ; Crinon, 2011). « Lirécrire pour apprendre » a pour objectifs (1) d’expérimenter, durant deux années scolaires consécutives, un programme didactique conçu comme une réponse à la prise en charge de difficultés langagières que rencontrent de nombreux élèves face aux usages proprement scolaires des écrits documentaires ; (2) de tester la validité de cet outil auprès d’un échantillon constitué de 90 classes de français du premier degré ( Cèbe & Goigoux, 2007) et (3) d’évaluer les conditions d’implémentation et de mise en œuvre du programme (en termes de formation et d’accompagnement des enseignants) les plus à même de favoriser et de maintenir le changement pédagogique (Rowan & Miller, 2007 ; Dumay, 2009). Dans le cadre de cette communication, nous nous proposons de déplier succinctement les difficultés de lecture et d’écriture identifiées en amont de la conception des cinq modules du programme et de présenter les leviers d’action mobilisés au sein de ceux-ci. Le cœur de la contribution portera ensuite sur l’examen de verbalisations et de traces écrites de l’activité des élèves à l’occasion des deux premiers modules du programme mis en œuvre, intitulés « Se familiariser avec les usages des écrits à visée informative, explicative et justificative » et « Sélectionner des informations dans un ou plusieurs texte(s) et les lier entre elles ». Notre analyse des diverses verbalisations générées par ces modules vise la description qualitative de l’activité des élèves en réaction à l’outil pédagogique que nous introduisons et aux supports et documents qu’ils sont amenés à exploiter. Sera également abordée la question de l’appropriation de l’outil par les enseignants. L’examen des verbalisations produites par ces derniers au cours des séances d’accompagnement (dont bénéficient six équipes partenaires) permettra d’observer les écarts et les lieux de convergence entre, d’une part, les pratiques habituelles des enseignants et, d’autre part, les supports et activités proposés par le programme. Nous verrons dans quelle mesure l’implémentation de l’outil didactique dans les classes amène les enseignants à questionner leurs propres postures, à identifier et à mettre en œuvre des gestes professionnels susceptibles de développer chez l’élève des démarches adaptées à la lecture/écriture de textes informatifs. [less ▲]

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See detailTSP model for electric vehicle deliveries, considering speed, loading and path slope.
Bay, Maud ULg; Limbourg, Sabine ULg

Conference (2015, April 17)

In the current Transport White Paper, the European Union presents a roadmap for a more competitive and sustainable European transport system. Concerning Urban Freight Transport, responsible for about a ... [more ▼]

In the current Transport White Paper, the European Union presents a roadmap for a more competitive and sustainable European transport system. Concerning Urban Freight Transport, responsible for about a quarter of CO2 emissions of the transport sector, one of the goals of the EU is to achieve essentially CO2-free city logistics in major urban centres by 2030 by developing and deploying new and sustainable fuels and propulsion systems. The gradual phasing out of ‘conventionally-fuelled’ vehicles from the urban environment contributes to reduce oil dependence, greenhouse gas emissions and local air and noise pollution. To meet European air quality standards, authorities of some major European cities have already introduced Low Emissions Zones where access to urban areas is limited to freight vehicles that meet certain emissions standards. Greater use of low-emission urban trucks based on electric, hydrogen and hybrid technologies would reduce air emissions, but also noise, letting to use road infrastructure more efficiently by making night deliveries and avoiding morning and afternoon peak periods. In addition to their role in the reduction of polluting emissions, the development of low-emission vehicles also allows to mitigate the dependence of the transportation sector to high fossil fuel prices. Electric vehicles have the potential to be powered by renewable energy sources such as wind and solar energy. However, weaknesses can be found in the limited capacity of the battery and the time needed to recharge, and consequently, the limited driving range of electric vehicle. The main sources for final energy consumption are the vehicle size and the engine characteristics, the load factor, the driving pattern, the gradient which represent the average topology of the country, the speed and the acceleration. To maximize the driving range, a routing model, which aims at minimizing the energy consumption, has to be developed. Our paper focus on the Electric Vehicle Traveling Salesman Problem (EV-TSP): given n cities, find the shortest tour, i.e., the shortest directed cycle containing all cities. The classical objective is to minimize the cost tour scheduling to fulfill delivery requests at each location. In this paper we consider the energy cost and we present an extension of the classical problem to minimize the remaining storage capacity of all electric vehicles at the destination node, knowing that there is no recharge operation on the tour. The objective function accounts not just for the travel distance but also on the load of the vehicle and on its speed while the energy consumption of the engine additionally depends on the path to travel, on the slope of the roads and on the vehicle specifications. Moreover, negative consumption that may happen due to regenerative breaking and kinetic energy capture on downhill paths is taken into consideration. Mathematical model is described and computational experiments are performed. [less ▲]

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See detailSnow cover evolution during the last fifty years in the Hautes Fagnes (Belgium) using the regional climate MAR model
Wyard, Coraline ULg; Fettweis, Xavier ULg; Erpicum, Michel ULg

Conference (2015, April 16)

The MAR model is a regional climate model originally developped for the polar regions to study the surface mass balance. In this study, the MAR model has been adapted to Belgium in order to study the snow ... [more ▼]

The MAR model is a regional climate model originally developped for the polar regions to study the surface mass balance. In this study, the MAR model has been adapted to Belgium in order to study the snow cover evolution of the Hautes Fagnes (south-east of Belgium), a region covered by snow one to two months per year. As validation, we have sucessfully compared MAR based daily snow heights with snowcam-based observations. Then, the model has been forced by ERA-Interim since 1958 to study the snow cover evolution during the last fifty years at the summit of Belgium. The results show non-significant trend. [less ▲]

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See detailFirst evidence of Neandertal cannibalism in Northern Europe: the case of the “Troisieme Caverne” of Goyet (Belgium)
Rougier, H.; Crevecoeur, I.; Beauval, C. et al

Conference (2015, April 15)

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See detailRecent increase of ethane detected in the remote atmosphere of the Northern Hemisphere
Franco, Bruno ULg; Bader, Whitney ULg; Bovy, Benoît ULg et al

Conference (2015, April 13)

Ethane (C2H6) has a large impact on tropospheric composition and air quality because of its involvement in the global VOC (volatile organic compound) – HOx – NOx chemistry responsible for generating and ... [more ▼]

Ethane (C2H6) has a large impact on tropospheric composition and air quality because of its involvement in the global VOC (volatile organic compound) – HOx – NOx chemistry responsible for generating and destroying tropospheric ozone. By acting as a major sink for tropospheric OH radicals, the abundance of C2H6 influences the atmospheric content of carbon monoxide and impacts the lifetime of methane. Moreover, it is an important source of PAN, a thermally unstable reservoir for NOx radicals. On a global scale, the main sources of C2H6 are leakage from the production, transport of natural gas loss, biofuel consumption and biomass burning, mainly located in the Northern Hemisphere. Due to its relatively long lifetime of approximately two months, C2H6 is a sensitive indicator of tropospheric pollution and transport. Using an optimized retrieval strategy (see Franco et al., 2014), we present here a 20-year long-term time series of C2H6 column abundance retrieved from ground-based Fourier Transform InfraRed (FTIR) solar spectra recorded from 1994 onwards at the high-altitude station of Jungfraujoch (Swiss Alps, 46.5° N, 3580 m a.s.l.), part of the Network for the Detection of Atmospheric Composition Change (NDACC, see http://www.ndacc.org). After a regular 1994 – 2008 decrease of the C2H6 amounts, which is very consistent with prior major studies (e.g., Aydin et al., 2011; Simpson et al., 2012) and our understanding of global C2H6 emissions, trend analysis using a bootstrap resampling tool reveals a C2H6 upturn and a statistically-significant sharp burden increase from 2009 onwards (Franco et al., 2014). We hypothesize that this observed recent increase in C2H6 could affect the whole Northern Hemisphere and may be related to the recent massive growth in the exploitation of shale gas and tight oil reservoirs. This hypothesis is supported by measurements derived from solar occultation observations performed since 2004 by the Atmospheric Chemistry Experiment – Fourier Transform Spectrometer (ACE-FTS) instrument and at other NDACC sites, namely Toronto (44° N) and Thule (77° N). Indeed, the recent rates of changes characterizing these data sets are consistent in magnitude and sign with the one derived from the FTIR measurements at Jungfraujoch. In contrast, the ethane time series form Lauder (45° S) shows a monotonic decrease over the last two decades. Investigating both the cause and impact on air quality of the C2H6 upturn should be a high priority for the atmospheric chemistry community. [less ▲]

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See detailEGU2015 - ENSO forecast using a wavelet-based mode decomposition
Deliège, Adrien ULg; Nicolay, Samuel ULg; Fettweis, Xavier ULg

Conference (2015, April 13)

The aim of this work is to introduce a new method for forecasting major El Niño/ La Niña events with the use of a wavelet-based mode decomposition. These major events are related to sea surface ... [more ▼]

The aim of this work is to introduce a new method for forecasting major El Niño/ La Niña events with the use of a wavelet-based mode decomposition. These major events are related to sea surface temperature anomalies in the tropical Pacific Ocean: anomalous warmings are known as El Niño events, while excessive coolings are referred as La Niña episodes. These climatological phenomena are of primary importance since they are involved in many teleconnections ; predicting them long before they occur is therefore a crucial concern. First, we perform a wavelet transform (WT) of the monthly sampled El Niño Southern Oscillation 3.4 index (from 1950 to present) and compute the associated scale spectrum, which can be seen as the energy carried in the WT as a function of the scale. It can be observed that the spectrum reaches five peaks, corresponding to time scales of about 7, 20, 31, 43 and 61 months respectively. Therefore, the Niño 3.4 signal can be decomposed into five dominant oscillating components with time-varying amplitudes, these latter being given by the modulus of the WT at the associated pseudo-periods. The reconstruction of the index based on these five components is accurate since more than 93% of the El Niño/ La Niña events of the last 60 years are recovered and no major event is erroneously predicted. Then, the components are smoothly extrapolated using polynomials and added together, giving so several years forecasts of the Niño 3.4 index. In order to increase the reliability of the forecasts, we perform several months hindcasts (i.e. retroactive probing forecasts) which can be validated with the existing data. It turns out that most of the major events can be accurately predicted up to three years in advance, which makes our methodology competitive for such forecasts. Finally, we discuss the El Niño conditions currently undergone and give indications about the next La Niña event. [less ▲]

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See detailA short dive into the complexity of Jupiter’s aurorae - invited
Bonfond, Bertrand ULg

Conference (2015, April 13)

Aurorae are the atmospheric signatures of energetic processes taking place far in the magnetosphere. One of the most important results brought by high resolution imaging of the UV aurorae at Jupiter is ... [more ▼]

Aurorae are the atmospheric signatures of energetic processes taking place far in the magnetosphere. One of the most important results brought by high resolution imaging of the UV aurorae at Jupiter is the realization that there isn’t such a thing as «the aurora» at Jupiter; as these light emissions appear to arise from a variety of processes. Some are related to the interaction of the magnetospheric plasma with the moons (the satellite footprints). Others are linked with the radial motion of flux tubes through centrifugal instabilities (the injection auroral signatures). Some diffuse emissions are connected with wave-particle interaction (the equatorward diffuse emissions). Another feature is associated with the magnetosphere-ionosphere coupling (the main emission/oval). Some auroral spots are related to internally driven reconnection (the polar dawn spots). Finally, the polar-most emissions remain to be understood and this list is still incomplete. In order to illustrate the discrepancies between these various features, I will show a set of recent results derived from the analysis of Hubble Space Telescope observations. For example, I will compare the vertical profile of satellite footprints and the main emissions, and show that the energy population of the precipitating particles varies from feature to feature. Moreover, even within a single feature, spatial variations do exist. As an example, I will characterize the dawn-dusk brightness discrepancy of the main emissions and discuss its implication regarding the magnetospheric currents. And finally, the dynamics of the features also helps differentiating one type of aurora from another. This will be shown through the description of the morphological evolution of the transient flares in the polar region. [less ▲]

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See detailHow phosphorus limitation can control climatic gas emission
Gypens; Borges, Alberto ULg; Speeckaert, Gaëlle ULg et al

Conference (2015, April 12)

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See detailUrban Greening Processes in Old Industrial Cities in Belgium: Factors of Success in Restoring Quality of Life and Combatting Environmental Inequalities
Lejeune, Zoé ULg

Conference (2015, April 11)

Environmental justice/inequality (EJ/I) movements, first in the US, then in many other countries have sought to shed light on the unequal environmental situations burdened by poor populations and ethnic ... [more ▼]

Environmental justice/inequality (EJ/I) movements, first in the US, then in many other countries have sought to shed light on the unequal environmental situations burdened by poor populations and ethnic minorities, and to challenge public policies and their unfair impact on those groups. In continental Europe and more specifically in Belgium, EJ activism has not emerged as a specific frame for environmental and urban contention. Locating this research at the interface of environmental inequality and urban environmental planning, we present findings from qualitative analysis gathered through interviews with local stakeholders be they elected officials, local officers, non-profit, or residents (n=30); our purpose is to ask how social movements as well as public authorities and ordinary citizens manage to reverse urban decline in old industrial cities in Belgium through environmental channels. These cities are characterized by environmental degradation and inequalities: atmospheric and soil pollution, brownfields, and high rates of unemployment, poverty, and social exclusion. We are interested in urban environmental processes, and explore the following question: what are the factors of success in restoring quality of life and wellbeing in two Belgian cities, with different mobilization profiles – one is successful, the other not – putting into perspective the determinants of successful renewal processes? We are particularly interested in understanding how environmental (inequality) issues are framed and handled politically at the local scale within those cities? The underlying goal consists of defining and formalizing new spaces and configurations of multilevel regulation between stakeholders, acting scale to revitalize their environment and their city or neighborhood, and to improve current urban policies in order to reduce environmental inequalities. Key findings are divided into five main explanatory categories: political opportunity structure; non-profit sector organization; citizens’ characteristics and collective action framework; bureaucratic reform; and symbolic action. [less ▲]

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See detailWhat is the professional profile of patients in phoniatrics?
Remacle, Angélique ULg; Petitfils, Cloé; LEJEUNE, LIONEL ULg et al

Conference (2015, April 10)

Objective. Research has paid increased attention to occupational voice disorders. This study describes the occupational status of patients examined in the Department of Otorhinolaryngology at Liège ... [more ▼]

Objective. Research has paid increased attention to occupational voice disorders. This study describes the occupational status of patients examined in the Department of Otorhinolaryngology at Liège University Hospital (Belgium) from 2009 to 2013. Study design. Retrospective study. Methods. The sex, age, diagnosis and occupational status were identified for 1,079 patients who were examined for a voice problem (754 women and 325 men; ages 4 to 93). The diagnosis was established using videolaryngostroboscopy. For patients who were employed, we identified (1) the numerically most frequent professionals, and (2) the professionals most at risk of consulting for their voice, based on the distribution of these professions among all workers living in French-speaking Belgium. Results. 11% of patients were unemployed, 15% were students, 20% were retired, and 54% were workers. In decreasing order of frequency, the most commonly seen professionals were teachers, office workers, artists (singers, actors, and musicians), storekeepers and marketing representatives, managers, domestic workers, and laborers. Regarding their distribution in the working population, the workers at greatest risk of consulting were artists, music teachers, counselors, sports coaches, psychologists, switchboard operators, journalists, and teachers. Nodules are the most common pathologies, encountered in 16.8% of the workers and 42.8% of the students who consulted the Department of Otorhinolaryngology for dysphonia. Conclusion. Prevention is needed both for the professions that seek medical help in the largest numbers (teachers) and for those that are at highest risk of consulting (artistic professions). In addition, teachers must be informed of the need to seek help as soon as voice problems appear. Level of evidence: 2b [less ▲]

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See detailEstimated Subglottic Pressure Evaluation, Evolution in 152 Dysphonic Patients
Morsomme, Dominique ULg; Finck, Camille ULg; Larrouy, Pauline ULg

Conference (2015, April 08)

Background: Estimated subglottic pressure (ESGP) is part of the aerodynamic measurements included in the vocal profile. It is an indication of vocal effort. Speyer reports an improvement of the ESGP score ... [more ▼]

Background: Estimated subglottic pressure (ESGP) is part of the aerodynamic measurements included in the vocal profile. It is an indication of vocal effort. Speyer reports an improvement of the ESGP score after voice treatment. Nevertheless, few studies used ESGP to evaluate voice efficiency treatment. Objectives: The purpose is to examine the ESGP twice, at the first (T1) and the last consultation (T2) . We observe the ESGP values according to voice pathology. We also examine the relationships between ESGP, SPL(Sound pressure level) and DSI (Discorder severity index) . Method: The study includes 130 patients (M:31/W:99), which suffer from 4 different pathologies as immobility (N: 54), oedema (N:23), nodules (N:24) and polyp (N:29). Each patient’s file consists of VLS, acoustic, aerodynamic and perceptual measures. The ESGP was collected through the Phonatory Aerodynamic System Model 6600 (KayPentax). Patients produced 3 sequences of / ipipi / at low (IL), conversational (IC) and high (IH) intensity. Patients were grouped according to the ENT’s diagnosis. We compare our values to those of Zraick et al (2012) which studied ESGP on a healthy group. Results: At T2, for the all patients, at minimum and conversational intensity the ESGP scores decrease singificantly, even if those scores were higher than for the healthy group. We observe a negative correlation between ESGP and SPL at low and conversational intensity. At T1, the higher is the ESGP score, the lower is the SPL score. At T2, the higher is the ESGP score, the higher is the SPL score. At T1, a negative correlation is observed between ESGP and DSI for 2 groups of patients (immobility and polyp) only at minimum intensity. The higher is the ESGP, the lower is SPL. At T2, only for the group immobility, the negative correlation persists. Conclusion: This study highlights the importance of considering the ESGP as a parameter of efficiency. High ESGP is mainly connected with patients who suffer from pathology. The patient who suffer from immobility seems to present a specific profile which could help the clinician to better understand their vocal behavior. Recommendation: This study highlights the pertinence of considering the ESGP as a parameter of vocal treatment efficiency. [less ▲]

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See detailAging Mechanisms in Amorphous GeTe
Raty, Jean-Yves ULg; Zhang, Wei; Luckas, Jennifer et al

Conference (2015, April 08)

We investigate the structure of amorphous GeTe using Density Functional Theory based Molecular Dynamics, using either the standard Generalized Gradient Approximation, or the more elaborate Van der Waals ... [more ▼]

We investigate the structure of amorphous GeTe using Density Functional Theory based Molecular Dynamics, using either the standard Generalized Gradient Approximation, or the more elaborate Van der Waals approximation. New insight is provided on the stability of homopolar GeGe bonds and tetrahedral Ge bonding, in relation with the resistance drift phenomenon, that is investigated experimentally using photothermal deflection spectroscopy experiments. Aging phenomena are common to all amorphous structures, but of special importance in phase change materials (PCM) since it impedes the realization of multi-level memories. Different interpretations have been proposed, but we focus here on the structural relaxation of amorphous GeTe, chosen because it is the simplest system that is representative of the wider class of GST alloys, lying along the GeTe-Sb2Te3 composition line of the GeSbTe phase diagram. Since the structural relaxations concerned with the drift take place on long time scales, the task of understanding them to limit their consequences is not a simple one. We successfully achieved this goal by developing new approaches to overcome a series of hurdles. A first problem is that directly generating an amorphous structure by quenching a liquid using Density Functional Theory (DFT) based Molecular Dynamics leads to one sample with a small number of atom (typically a few hundreds), and, hence of small number of atomic environments. Here we sample a large number of local atomic environments, corresponding to different bonding schemes, by chemically substituting different alloys, selected to favor different local atomic structures. This enables spanning a larger fraction of the configuration space relevant to aging. A second aspect is that GST alloys are known to display complex bonding mechanisms, for which the simple chemist’s “octet-rule” does not apply, leading a long series of controversies, concerning in particular the local structure around Ge atoms. We overcome this problem by using state of the art non local DFT-MD, including the so-called van der Waals corrections. This leads to more clearly defined environments that are thoroughly analyzed. We can then identify their fingerprints in the available structural experimental data and assess the stability of these local environments to obtain information of the driving forces leading to the structural relaxation. The calculated electronic properties nicely match the most recent photothermal deflection spectroscopy experiments that are presented here. Our results support a model of the amorphous phase and its time evolution that involves an evolution of the local (chemical) order towards that of the crystal (by getting rid of homopolar bonds), and an evolution of its electronic properties that drift away from those of the crystal, driven by an increase of the Peierls-like distortion of the local environments in the amorphous, as compared to the crystal. [less ▲]

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See detailState of the art on drivers of deforestation in the Congo basin tropical forest
Gillet, Pauline ULg; Vermeulen, Cédric ULg; Dessard, Hélène et al

Conference (2015, April 07)

The Congo basin forest experiment a low pressure on biodiversity in comparison to other rainforests around the world. But according to the predictions, climate change and direct human drivers could have ... [more ▼]

The Congo basin forest experiment a low pressure on biodiversity in comparison to other rainforests around the world. But according to the predictions, climate change and direct human drivers could have an important effect on the deforestation rate. In that context, CoForTips project want to foster a better management of the Congo Basin forests through a better understanding of the dynamics, regime shifts and tipping points of biodiversity and a better definition of the conditions of resilience of social and ecological systems. In order to assess the current knowledge about drivers of deforestation in the world tropical forests, we analyzed the existent literature to list the direct and indirect drivers of deforestation in the forested tropical zones and to focus on deforestation in the Congo Basin forest and specifically in Cameroon and Gabon. We listed direct drivers of deforestation like expansion of agriculture which can be either family farming or agribusiness; timber extraction for softwood industry and fuel wood; development of infrastructure leading to the opening up of forested land and populations, and mining industries. The underlying causes found in the literature concern economic factors like gross domestic product, national income based on environmental resources exploitation and consumer demand expressing on local and global markets. Technological factors that allow much larger removal. Cultural issues like representation of the forest in the collective imagination as an important source of economic income. Institutional factors like policy measures advocating pro-deforestation measures and demographic causes taking into account for local population rise due to a high fertility rate and linked to population migration. Those direct and underlying causes of deforestation where then detailed for Cameroon and Gabon. [less ▲]

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See detailLire le futur du passé: villes et paysages de Meuse en projet
Occhiuto, Rita ULg

Conference (2015, April 03)

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See detailTree models with Scikit-Learn: Great models with little assumptions
Louppe, Gilles ULg

Conference (2015, April 03)

This talk gives an introduction to tree-based methods, both from a theoretical and practical point of view. It covers decision trees, random forests and boosting estimators, along with concrete examples ... [more ▼]

This talk gives an introduction to tree-based methods, both from a theoretical and practical point of view. It covers decision trees, random forests and boosting estimators, along with concrete examples based on Scikit-Learn about how they work, when they work and why they work. [less ▲]

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See detailDoes high school program choice affect academic performance? Evidence for Economics
Lefevre, Mélanie ULg

Conference (2015, April 02)

This study evaluates the impact of the choice of the Economics elective course in secondary school on the performance in Economics at the University level. While several studies look at the impact on ... [more ▼]

This study evaluates the impact of the choice of the Economics elective course in secondary school on the performance in Economics at the University level. While several studies look at the impact on performance of the number of hours of mathematics in secondary school, less has been made regarding the impact of the secondary school Economics program. We match survey data from 360 students enrolled in the first year of the bachelors program in HEC-Management School of University of Liège, with administrative data and exam results. The methodological challenge is that students who choose Economics elective course in secondary school are likely to be different, in terms of motivation, from other students. To get rid of this potential bias, we approximate motivation using self-reported reasons for the choice of the elective courses, but also participation to non-mandatory tests and preparations before the exam. We also control for several individual characteristics (socio-economic background, age, gender, secondary school fixed effect, etc.) in order to compare students with similar abilities. Preliminary analysis shows that students who have chosen Economics elective course in the last year of secondary school do not perform better, or worse, at their University Economics exam, when controlling for the number of hours of mathematics they had in secondary school, as well as other individual characteristics. However, they are less likely to report their bachelor Economics course as being “difficult”. Overconfidence of students with higher previous economic knowledge may explain why they do not perform better than their peers. [less ▲]

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See detailApplication of stable isotopes in trophic ecology: importance of TEF and seasonal baseline for robust interpretations.
Remy, François ULg; Darchambeau, François ULg; Dauby, Patrick ULg et al

Conference (2015, April 02)

Nitrogen, carbon and sulfur stable isotopes are very powerful tools for trophic ecologists to delineate food webs of various ecosystems. More recently… the use of mixing models has exponentially increased ... [more ▼]

Nitrogen, carbon and sulfur stable isotopes are very powerful tools for trophic ecologists to delineate food webs of various ecosystems. More recently… the use of mixing models has exponentially increased to give a more specific vision of organism’s diets and trophic relationships. Two case studies will be presented to give a summary of what’s been done in Liège Oceanology Lab to improve our interpretation of stable isotopes results. First is an experimental calculation of the Trophic Enrichment Factors (TEFs) for one dominant detritivorous species of Mediterranean amphipod inhabiting seagrass detritus: Gammarus aequicauda (Martynov, 1931). This experimental study was planned after a strange result of the SAIR mixing model, giving results opposed to all observations and knowledge we had about this species. Thus, the impact of 3 very different food sources (amphipod powder, algae power, seagrass powder) on the turnover rate of C and N isotopic compositions was tested, and afterwards TEFs for C and N for each source were calculated. Animal food source showed to be the most effectively assimilated with a fast turnover rate while seagrass and algae showed very slow assimilation. TEFs calculations showed to be interesting because TEFs seem not to depend on the natural feeding type of the invertebrate but more on the type of food source. Animal source showed carnivorous TEFs values while seagrass and algae source showed typical detritivorous values. SIAR results with these new custom values gave more coherent values highlighting the major importance of TEFs values for mixing models data interpretation. Second is a simple question: are the seasonal isotopic composition variations observed for many seagrass detritus macrofauna species due to actual diet changes, or only to isotopic baseline shift of the food sources? Macrofauna and all potential food sources were sampled near STARESO Oceanographic Station (Corsica, 8°45’E; 42°35’N) in 2011-2012 at each season at two different sites. SIBER software runs with C and N isotopic data showed spatio-temporal isotopic variations at community, interspecific and intraspecific level. SIBER did not gave us information about the origin of these changes, but coupled with SIAR and our custom TEFs, species actually showing drastic changes of diet were identified, while others seem to reflect more a source baseline isotopic composition shift. Working at specific level is compulsory for fine conclusions. These two case studies highlight the importance of mixing model use and of accurate TEF values to run these models properly to draw robust and reliable conclusions using stable isotopic data. [less ▲]

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See detailA comparative study of finite strain formulations in the buckling of cruciform columns
Careglio, Claudio; Canales Cardenas, Cristian ULg; Garcia Garino, Carlos et al

Conference (2015, April)

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See detailDoes the soil’s effective hydraulic conductivity adapt in order to obey the Maximum Entropy Production principle? A lab experiment
Westhoff, Martijn ULg; Zehe, Erwin; Erpicum, Sébastien ULg et al

Conference (2015, April)

The Maximum Entropy Production (MEP) principle is a conjecture assuming that a medium is organized in such a way that maximum power is subtracted from a gradient driving a flux (with power being a flux ... [more ▼]

The Maximum Entropy Production (MEP) principle is a conjecture assuming that a medium is organized in such a way that maximum power is subtracted from a gradient driving a flux (with power being a flux times its driving gradient). This maximum power is also known as the Carnot limit. It has already been shown that the atmosphere operates close to this Carnot limit when it comes to heat transport from the Equator to the poles, or vertically, from the surface to the atmospheric boundary layer. To reach this state close to the Carnot limit, the effective thermal conductivity of the atmosphere is adapted by the creation of convection cells (e.g. wind). The aim of this study is to test if the soil’s effective hydraulic conductivity also adapts itself in such a way that it operates close to the Carnot limit. The big difference between atmosphere and soil is the way of adaptation of its resistance. The soil’s hydraulic conductivity is either changed by weathering processes, which is a very slow process, or by creation of preferential flow paths. In this study the latter process is simulated in a lab experiment, where we focus on the preferential flow paths created by piping. Piping is the process of backwards erosion of sand particles subject to a large pressure gradient. Since this is a relatively fast process, it is suitable for being tested in the lab. In the lab setup a horizontal sand bed connects two reservoirs that both drain freely at a level high enough to keep the sand bed always saturated. By adding water to only one reservoir, a horizontal pressure gradient is maintained. If the flow resistance is small, a large gradient develops, leading to the effect of piping. When pipes are being formed, the effective flow resistance decreases; the flow through the sand bed increases and the pressure gradient decreases. At a certain point, the flow velocity is small enough to stop the pipes from growing any further. In this steady state, the effective flow resistance of the sand bed will be compared with the theoretical optimal flow resistance obtained with the MEP principle. For this study, different magnitudes of the forcing will be tested, while also the effect of dry spells will be explored. [less ▲]

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See detailSeed and pollen dispersal in Guineo-Congolian canopy tree species – insights from genetic markers in multiple species
Hardy, Olivier J.; Duminil, Jérôme; Daïnou, Kasso ULg et al

Conference (2015, April)

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See detailThe Fish Migrate and so Must We': the Relationship between International and Internal Environmental Mobility in a Senegalese Fishing Community
Zickgraf, Caroline ULg

Conference (2015, April)

In 2008, the UN designated Saint-Louis “the city most threatened by rising sea levels in the whole of Africa”. The people of Guet Ndar, a densely populated fishing quarter, are coping with environmental ... [more ▼]

In 2008, the UN designated Saint-Louis “the city most threatened by rising sea levels in the whole of Africa”. The people of Guet Ndar, a densely populated fishing quarter, are coping with environmental challenges on two fronts: 1) coastal erosion and intensifying storms have destroyed sea-front homes, and, 2) overfishing and climate change’s maritime impacts are making local fishing less feasible as a livelihood strategy. Based on a local case study, this paper examines Guet Ndarian migration as an adaptive response to environmental risks and more specifically climate change: 1) through the intensification of fishing migration to Mauritania, and 2) through home construction on the mainland away from the encroaching sea. Although these population movements respond to different environmental challenges, this paper identifies their enmeshment as the former facilitates the latter. Furthermore, it embeds these migratory dynamics in their socio-economic context and applies mobility and transnational paradigms to environmentally vulnerable areas. [less ▲]

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See detailThe Ramses Project in interaction / Metadata and Thesauri in Ramsès / Towards a TEI pivot-format for Ancient Egyptian texts
Polis, Stéphane ULg

Conference (2015, April)

Three talks about forthcoming developments in the field of Ancient Egyptian corpus annotation.

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See detailLes voix du lecteur dans la presse française au XIXe siècle: introduction et conclusions
Stienon, Valérie ULg; Absalyamova, Elina

Conference (2015, April)

Le XIXe siècle est assurément l’âge de la lecture. Traversé par un double mouvement d’alphabétisation et de croissance démographique, il voit le lectorat s’étendre à de nouvelles catégories de personnes ... [more ▼]

Le XIXe siècle est assurément l’âge de la lecture. Traversé par un double mouvement d’alphabétisation et de croissance démographique, il voit le lectorat s’étendre à de nouvelles catégories de personnes : ouvriers, femmes, enfants. Dans les foyers, les cafés, les cercles et les cabinets de lecture, c’est l’imprimé à diffusion périodique qui attire à lui l’essentiel de ce nouveau public. Le journal offre une alternative majeure au livre, moins coûteuse et plus accessible. Plus immédiate, aussi, puisqu’il construit avec ses destinataires un système d’adresses et de réponses autour de l’actualité socioculturelle. Du courrier des lecteurs au droit de réponse, en passant par la causerie, le badinage, la note et la lettre ouverte, variés sont les moyens dont il dispose pour donner, réellement ou fictivement, la parole à ses lecteurs. Plus qu’une figure de récepteur à émouvoir, éduquer ou moraliser, le lecteur devient véritablement une « voix » qui investit les nouveaux espaces d’expression de la civilisation du journal alors en constitution en France. Commenter les faits divers, orienter l’intrigue duroman-feuilleton et réagir à la parution d’une oeuvre deviennent autant d’initiatives accessibles au plus grand nombre. En associant l’étude des imaginaires médiatiques à la poétique du support et à l’histoire culturelle, ces deux journées ont pour objectif d’éclairer les rôles et les statuts du lectorat tels qu’ils sont décelables dans la textualité du journal. Que nous apprend celle-ci sur laparticipation des lecteurs au dialogue créatif avec les producteurs, à la configuration des genres, à la promotion des oeuvres, aux définitions de l’écrivain en régime médiatique ? [less ▲]

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See detailNumerical prediction of resulting rollover shapes and sheared edges after blanking process
Canales Cardenas, Cristian ULg; Boman, Romain ULg; Bussetta, Philippe et al

Conference (2015, April)

Over the years, the simulation of manufacturing processes has introduced several numerical challenges for researchers in computational mechanics. In particular, the numerical modeling of sheet metal ... [more ▼]

Over the years, the simulation of manufacturing processes has introduced several numerical challenges for researchers in computational mechanics. In particular, the numerical modeling of sheet metal blanking process involves different numerical issues that must be carefully treated: a large and highly localized deformation in the shearing zone prior to fracture, complex contact interactions between the tools and the metallic sheet and finally, the ductile failure phenomenon. Despite that this process is one of the most widely used cutting techniques for mass production, the process parameters are normally set by empirical evidence due to the physical complexity resulting from the extreme amount of shearing involved. In addition, the strain-rate dependent behavior of the material must be taken into account due to high punch velocities encountered in practice. Thus, an accurate numerical tool is extremely desirable to optimize the setting parameters of this technique and will lead to a better understanding of the process. [less ▲]

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See detailLe retour du sujet en didactique des langues ?
Defays, Jean-Marc ULg

Conference (2015, March 28)

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See detailLa réception du livre italien dans les anciens Pays-Bas à la première modernité : Bilan et perspectives de recherches
Adam, Renaud ULg

Conference (2015, March 28)

Cette communication sera l’occasion pour Renaud Adam de faire un premier bilan des activités menées en Belgique sur la réception du livre italien dans les anciens Pays-Bas aux XVIe et XVIIe siècles depuis ... [more ▼]

Cette communication sera l’occasion pour Renaud Adam de faire un premier bilan des activités menées en Belgique sur la réception du livre italien dans les anciens Pays-Bas aux XVIe et XVIIe siècles depuis le lancement, en novembre 2013, du projet international sur l'Édition italienne dans l'espace francophone à la première modernité (EDITEF). Il présentera notamment les premiers résultats d’une enquête centrée sur la place du livre italien, en langue vulgaire ou en traduction, dans la partie d’expression française des anciens Pays- [less ▲]

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See detailOrgan donation after euthanasia on specific patients' request in Belgium
Ysebaert, Y; DETRY, Olivier ULg; Mikhalski, D et al

Conference (2015, March 28)

Euthanasia is banned in almost countries of the world, although in 2002 Belgium legalized it for adults under strict conditions (in a similar way after The Netherlands in 2001. The patient must be in a ... [more ▼]

Euthanasia is banned in almost countries of the world, although in 2002 Belgium legalized it for adults under strict conditions (in a similar way after The Netherlands in 2001. The patient must be in a medically futile condition, of constant and unbearable physical or mental suffering that cannot be alleviated, resulting from a serious and incurable disorder caused by illness or accident. If the person is not in the terminal phase of his illness, the 2 doctors must consult with a third doctor, either a psychiatrist or a specialist in the disease concerned. From 2005 till 2014 more than 25 patients, suffering from diverse neuropsychiatric diseases, got their request for euthanasia granted, and subsequently asked spontaneously for the possibility of organ donation. The involved physicians, the transplant teams and the Institutional Ethics Committees, had the well-discussed opinion that this strong request for organ donation after euthanasia could not be denied. A clear separation between the euthanasia request, the euthanasia procedure and the organ procurement procedure was judged necessary. After extensive preparation, finally, in Belgium, 17 patients got their wish for organ donation after euthanasia fulfilled, in several academic or non-academic hospitals and in different regions : Antwerpen 6, Leuven 5, Liege 2, Namur 1, Turnhout 1, and Brussels 2. Several requests and negotiations were started for other patients but ultimately failed due to patients’ personal choices (e.g. patient wanted finally to die at home) or logistically reasons (e.g. who would fulfil the euthanasia in case all involving doctors were not employed or connected to a hospital). The euthanasia procedure was carried out by three physicians in the neighborhood of the operating room. After clinical diagnosis of cardiac death, the procurement team came in and performed the organ procurement similar as in a DCD type III procedure. The liver, two kidneys and sometimes lungs and pancreatic islets could be successfully recovered and transplanted, after organ allocation via Eurotransplant. Transplant centers were informed about the nature of the case and the elements of organ procurement. There was primary function of all organs. The possibility of organ donation after their euthanasia provides a very much improved self-image of these patients, and adds something really positive to the euthanasia procedure, and is very well appreciated by the requesting patients, relatives, patient and professional organisations and public media. Some practical and ethical issues still have to be discussed to allow expansion of this possibility of organ donation. [less ▲]

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See detailLa promotion de l’activité physique dans les écoles : un projet de société
Cloes, Marc ULg

Conference (2015, March 28)

A l'heure actuelle, les preuves scientifiques existent pour souligner la nécessité de lutter contre la sédentarité. L'école constitue un pilier essentiel de l'action à mettre en oeuvre dans cette ... [more ▼]

A l'heure actuelle, les preuves scientifiques existent pour souligner la nécessité de lutter contre la sédentarité. L'école constitue un pilier essentiel de l'action à mettre en oeuvre dans cette perspective et, en son sein, les enseignants en éducation physique devraient jouer un rôle central en tant que 'pierre angulaire' de la promotion de l'activité physique. Ceci exige toutefois un recentrage de leur intervention sur le développement de citoyens physiquement éduqués, justifiant un changement dans les priorités de leur enseignement. Cela ne peut toutefois pas être mis en oeuvre sans le soutien des autorités scolaires locales et du domaine de la santé. Un axe de travail consiste finalement à éduquer la société en communiquant davantage à propos de ce qui est fait à l'école pour développer un style de vie actif. [less ▲]

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See detailLa collaboration entre différentes disciplines médicales : ou est le problème ? Etude Partnership in Medicine
Vanmeerbeek, Marc ULg; Govers, Patrick ULg; Schippers, Nathalie ULg et al

Conference (2015, March 27)

Objectifs Les maladies ou problèmes médicaux d’origine professionnelle, ou en lien avec le travail, impliquent à des degrés divers les médecins généralistes (MG), les médecins du travail (MT) et les ... [more ▼]

Objectifs Les maladies ou problèmes médicaux d’origine professionnelle, ou en lien avec le travail, impliquent à des degrés divers les médecins généralistes (MG), les médecins du travail (MT) et les médecins-conseils des mutuelles (MC). Le manque de relation fonctionnelle entre eux peut compliquer ou retarder le retour au travail du patient. L’étude cherchait des pistes d’amélioration de la collaboration. Méthode Deux méthodes de consensus ont été successivement utilisées parmi les trois professions : huit groupes nominaux (GN) ont réunis 74 médecins de terrain; deux rondes Delphi ont concerné 28 décideurs. Résultats Un seul médecin a été perdu de vue entre les 2 tours du Delphi. Les propositions issues des GN concernaient le transfert d’informations (surtout les MT et les MC), la collaboration (surtout les MG et les MT), les connaissances, et le cadre légal et réglementaire (surtout les MC). Cinq questions sur 14 n’ont pas fait consensus (≥75%) au 1er tour du Delphi, et 10 propositions sur 13 ont été rejetées au 2e tour. Les désaccords portaient sur la nature des données à transférer, les modalités de transfert d’information, la disponibilité des données de contact des médecins. Un processus d’évitement spécifique a été mis en évidence. Certains commentaires montraient un déni de la capacité des autres à comprendre son champ professionnel, et une difficulté à considérer leur spécificité propre. Conclusions L’étude montre que le patient n’est pas un objet partagé de la relation. Le modèle Resource Dependence Institutional Cooperation (De Rijk) permet de distinguer les entraves à la volonté de coopérer (dépendance perçue) des limitations dans la capacité à le faire (manque de ressources). Le modèle quadridimensionnel de la collaboration (D’Amour) identifie un déficit d’internalisation du côté relationnel (reconnaissance des autres), et un déficit de gouvernance et de formalisation du côté organisationnel, où des initiatives volontaristes des autorités seraient bienvenues. [less ▲]

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See detailHenri Lévy-Bruhl et Fernand De Visscher, une amitié Franco-Belge
Gerkens, Jean-François ULg

Conference (2015, March 27)

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See detailDigitizing Artists’ Identity and Networks: EpistolART, a New Database
Delfosse, Annick ULg

Conference (2015, March 26)

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See detailHarmony and Efficiency: Erudite libertinism in Early Modern France
Decoster, Sara ULg

Conference (2015, March 26)

This paper deals with the idea of reason as it was seen by erudite libertines in Early Modern France. The analysis will draw on the work of Gabriel Naudé (1600-1653) and highlight the influence of ... [more ▼]

This paper deals with the idea of reason as it was seen by erudite libertines in Early Modern France. The analysis will draw on the work of Gabriel Naudé (1600-1653) and highlight the influence of Montaigne. Naudé developed an ideal of reason based on autonomous thinking within the humanist tradition. The paper shows that this idea of reason was based on two concepts which have been neglected by scholars in the field of erudite libertinism: harmony and efficiency. These concepts appear to be closely related to the stoic vision of moderation, preventing men to become a slave of their passions. This meant in the first place that knowledge had to go hand in hand with harmony. Exclusive focus on specific theories or small, too erudite, details was considered as inappropriate exaggeration. In the second place, Naudé’s concept of efficiency implied that knowledge had to be useful for civic life. [less ▲]

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See detailInternal dynamics, innovation and investments in sustainability
Crutzen, Nathalie ULg; Rammal, Hussain; Burritt, Roger

Conference (2015, March 26)

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See detailPost-Humanities: the Future of Mankind as the Latest Academic Obsession
Guesse, Carole

Conference (2015, March 26)

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See detailThe development of mobility controls
Crutzen, Nathalie ULg; Qian, Wei

Conference (2015, March 26)

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See detailA doublescale model for hydromechanical coupling in clay rocks
van den Eijnden, Abraham Pieter ULg; Bésuelle, Pierre; Collin, Frédéric ULg et al

Conference (2015, March 26)

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See detailPost-Humanities: the Future of Mankind as the Latest Academic Obsession
Guesse, Carole ULg

Conference (2015, March 26)

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See detailEditing a Multilingual Corpus of Letters. A Methodological Approach
Valenti, Gianluca ULg

Conference (2015, March 26)

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See detailModelling the excavation damaged zone in Callovo-Oxfordian claystone using shear strain localisation
Pardoen, Benoît ULg; Levasseur, Séverine; Collin, Frédéric ULg et al

Conference (2015, March 26)

see attached abstract

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See detailPlasma riche en plaquettes - PRP
Kaux, Jean-François ULg

Conference (2015, March 25)

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See detailEco-toxicological analysis of free-ranging cetaceans from the North-western Mediterranean Sea
Pinzone, Marianna ULg; Ody, Denis; Lepoint, Gilles ULg et al

Conference (2015, March 25)

The numerous anthropogenic activities occurring nowadays in the North-western Mediterranean Sea strongly affect top predators such as marine mammals, especially through the bioaccumulation of lipophilic ... [more ▼]

The numerous anthropogenic activities occurring nowadays in the North-western Mediterranean Sea strongly affect top predators such as marine mammals, especially through the bioaccumulation of lipophilic contaminants. In order to assess the eco-toxicological status of local living cetaceans blubber biopsies were collected between 2006 and 2013. Selected persistent organic pollutants POPs (31PCBs, 15 organochlorine compounds, 9 PBDEs and 17 PCDD/Fs) were analyzed in 49 long-finned pilot whales Globicephala melas, 61 sperm whales Physeter macrocephalus and 70 fin whales Balaenoptera physalus. δ13C, δ15N values and POPs levels were assessed through IR-MS and GC-MS respectively. To assess the toxic potency of the dioxin-like compounds, the TEQ approach was applied. δ15N values were 12.2±1.3‰ for sperm whales, 10.5±0.7‰ for pilot whales and 7.7±0.8‰ in fin whales, positioning sperm whales at higher trophic levels. δ13C instead was similar and amounted to −17.3±0.4‰, −17.8±0.3‰ and −18.7±0.4‰ respectively. Pilot whales presented higher concentrations than sperm whales for ΣPCBs (38666±25731ng.g-1 lw and 22849±15566ng.g-1 lw respectively), ΣPBDEs (712±412ng.g-1 lw and 347±173ng.g-1 lw respectively) and ΣDDTs (46081±37506ng.g-1 lw and 37647±38518ng.g-1 lw respectively). Fin whales presented the lowest values, in accordance with its trophic position (ΣPCBs: 5721±5180ng.g-1 lw, ΣPBDEs: 177±208ng.g-1 lw and ΣDDTs: 6643±5549ng.g-1 lw). The PCA analysis confirmed how p,p’DDT and p,p’DDE were influential in differentiating the species, as a consequence of their migratory behavior and distribution. Pollutant concentrations were significantly higher than both their Southern Hemisphere and North Atlantic counterparts, possibly due to the particular Mediterranean geomorphology, which influences pollutants distribution and recycle. Dioxin-like  PCBs accounted for over 80% of the total TEQ. This study demonstrated (1) an important exposure to pollutants of Mediterranean toothed-whales, often surpassing the estimated threshold toxicity value of 17000ng.g−1 lw for blubber in marine mammals; and (2) how their geographical distribution can influence the pollutants profile and concentrations. [less ▲]

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See detailThe effect of deforestation on land tenure in Central Africa
Gillet, Pauline ULg; Feintrenie, Laurène; Codina Llavinia, Elisabet et al

Conference (2015, March 23)

The CoForTips project aims at the promotion of better management of the forest of the Congo Basin by presenting to the policy makers plausible scenarios of social and ecological systems evolution. In this ... [more ▼]

The CoForTips project aims at the promotion of better management of the forest of the Congo Basin by presenting to the policy makers plausible scenarios of social and ecological systems evolution. In this paper, we focused on the impact of deforestation on land tenure mutation in Central Africa. Land tenure defines the level of ownership and management experienced by the local population on defined areas (Le Roy et al., 1996). We assume that the rules acting on objects of land tenure evolve from loose land control to privatization and the ability to dispose of resources when we progress on the forest transition curve designed by Mather (1992). We demonstrate that individual land tenure increases along with the deforestation process, and continue along with the reforestation process where this one is a consequence of agricultural plantations on deforested lands. We then draw a theoretical land tenure evolution with variation of population density in relation to forest cover that could be used as an indicator of SES shifting more sensitive than the evolution of forest cover to appreciate forest transition at the SES level and predict the presence and intensity of tipping points. [less ▲]

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See detailDispreferred structures through language change: the diachrony of affix ordering in Ancient Egyptian - Coptic
Grossman, Eitan; Polis, Stéphane ULg

Conference (2015, March 23)

Given a worldwide preference for suffixes over prefixes, why do some languages nonetheless have a macro-preference for prefixes? In this talk, we show that Ancient Egyptian-Coptic (Afroasiatic) shows a ... [more ▼]

Given a worldwide preference for suffixes over prefixes, why do some languages nonetheless have a macro-preference for prefixes? In this talk, we show that Ancient Egyptian-Coptic (Afroasiatic) shows a long-term diachronic macro-change from mixed suffixing-prefixing to an overwhel¬ming preference for prefixing. We argue that each of the micro-changes implicated in this macro-change are better understood in terms of regular changes at the level of individual constructions, via, e.g., grammaticalization, rather than in terms of a broad Sapirian ‘drift.’ Crucially, it is the particular constellation of structural features of the language at a particular moment in time, together with regular mechanisms of language change, that give rise to the cross-linguistically unusual ‘macro-preference’ of the language. [less ▲]

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See detailAge and WHO Performance Score are major clinical prognostic factors in glioblastoma
Lambert, Jérémy ULg; Scholtes, Félix ULg; MARTIN, Didier ULg

Conference (2015, March 21)

In glioblastoma patients with similar prognostic factors—like age, performance status and extent of surgical resection—clinical evolution is still variable. In addition, the benefit of resection of ... [more ▼]

In glioblastoma patients with similar prognostic factors—like age, performance status and extent of surgical resection—clinical evolution is still variable. In addition, the benefit of resection of recurrent tumours is uncertain. In this study, prognostic subgroups are established on a clinical basis and the benefit of surgery for recurrence is compared between them. Recursive partitioning analysis on EORTC sample 26981 (n=239) identified clinical factors influencing Progression-Free Survival (PFS), in order to create prognostic subgroups, whose PFS and survival after recurrence were compared using Kaplan-Meier curves and log-rank tests. Results were validated on a sample from Liège University Hospital (n=92). WHO Performance Status (WHO-PS) and age at first intervention (“age”) defined 4 subgroups. PFS was shorter in WHO-PS 2–3 than WHO PS 0–1 patients. In both groups, age was the second classifying factor (cut-off: 47.5y for WHO-PS 0–1, 60.5y for WHO-PS 2–3). The 4 subgroups had significantly different median PFS (77.5, 144, 234.5 and 346.5 days) and median overall survival (126, 330, 476 and 675 days). Survival after recurrence was correlated with PFS, and recurrence resection was associated with longer survival, regardless of the prognostic subgroup. Clinical prognostic glioblastoma subgroups with distinct PFS exist and can be defined by WHO-PS and age. This classification can be used as a clinical basis to identify molecular patterns associated with prognosis. In addition, in all subgroups, this retrospective analysis suggests a benefit of surgical resection when feasible. [less ▲]

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See detailThe need for site-specific height-diameter allometry of Central African moist forests
Loubota Panzou, Grâce Jopaul ULg; Doucet, Jean-Louis ULg; Fayolle, Adeline ULg

Conference (2015, March 21)

L’utilisation de l’allométrie hauteur-diamètre globale ou régionale en milieu tropical pourrait avoir des conséquences importantes dans les estimations de biomasse et des stocks de carbone. L’objectif de ... [more ▼]

L’utilisation de l’allométrie hauteur-diamètre globale ou régionale en milieu tropical pourrait avoir des conséquences importantes dans les estimations de biomasse et des stocks de carbone. L’objectif de ce travail est d’identifier les variations de l’allométrie hauteur-diamètre au sein de deux types de forêts (forêt sempervirente et forêt semi-décidue) au sud du Cameroun et d’examiner leurs conséquences sur les estimations de biomasse. Le diamètre et la hauteur ont été mesurés sur un total de 521 arbres appartenant à 15 espèces et couvrant une gamme de diamètre de 10 à 240 cm. Une calibration des mesures non destructives et destructives de la hauteur a été réalisée sur 60 arbres. Dix modèles allométriques ont été ajustés sur ces données. Le meilleur modèle a été sélectionné avec Akaike Information Criterion (AIC). L’allométrie hauteur-diamètre au niveau des sites et entre les espèces a montré une tendance asymptotique (Modèle de Michaelis-Menten). Pour un même diamètre, les arbres étaient plus hauts dans les forêts semi-décidues que dans les forêts sempervirentes. Les différences de biomasse entre les deux types de forêts sont dues par les variations de l’allométrie hauteur-diamètre. Les variations de l’allométrie hauteur-diamètre sont donc d’une extrême importance dans les estimations de biomasse et des stocks de carbone des forêts denses humides tropicales d’Afrique centrale. [less ▲]

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See detailVoltaire as a playwright, an off-centered strategy?
Daubercies, Laurence ULg

Conference (2015, March 21)

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See detailCulture and hallucinations: what we know so far and what needs to be addressed
Laroi, Frank ULg

Conference (2015, March 21)

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See detailEntorse de cheville aigüe - Le traitement fonctionnel
Kaux, Jean-François ULg

Conference (2015, March 21)

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See detailDommage psychique par répercussion chez l'enfant
Malchair, Alain ULg

Conference (2015, March 21)

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See detailNueva visión en las relaciones médico-paciente, de la Prevención Cuaternaria a la Actitud Cuaternaria.
Jamoulle, Marc ULg

Conference (2015, March 21)

Allocution plénière finale du congrès de Montevideo de la Wonca CIMF Description du concept de prévention quaternaire. Annonce de la parution et présentation des auteurs du numéro spécial de la revue ... [more ▼]

Allocution plénière finale du congrès de Montevideo de la Wonca CIMF Description du concept de prévention quaternaire. Annonce de la parution et présentation des auteurs du numéro spécial de la revue Brésilienne de médecin de famille et communautaire (RBMFC) qui va paraitre incessamment sur ce thème. Annonce de la création par les représentants des associations de médecine de famille de 15 pays, au sein de la branche ibéro américaine de la Wonca (Wonca CIMF), d'un groupe d'intérêt sur la prévention quaternaire [less ▲]

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See detailIntroduction/Conclusion
Genin, Vincent ULg

Conference (2015, March 20)

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See detailLes moudjahidines européens en Syrie et en Irak sous l'angle du droit des conflits armés
Deprez, Christophe ULg

Conference (2015, March 20)

Dans le cadre de la quatrième journée franco-belge de droit pénal, cette présentation PowerPoint a servi de support à un exposé portant sur le statut, en droit des conflits armés, des ressortissants ... [more ▼]

Dans le cadre de la quatrième journée franco-belge de droit pénal, cette présentation PowerPoint a servi de support à un exposé portant sur le statut, en droit des conflits armés, des ressortissants européens partis se battre en Syrie et en Irak. [less ▲]

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See detailAnálisis de contenido e indexación de 1.600 resúmenes de los trabajos en varios Congreso Europeo de Medicina Familiar.
Jamoulle, Marc ULg

Conference (2015, March 19)

Análisis de contenido e indexación de 1.600 resúmenes de los trabajos en varios Congreso Europeo de Medicina Familiar Marc Jamoulle, Department of General Practice, Liege University, Belgium La ... [more ▼]

Análisis de contenido e indexación de 1.600 resúmenes de los trabajos en varios Congreso Europeo de Medicina Familiar Marc Jamoulle, Department of General Practice, Liege University, Belgium La comunicación en congresos de medicina de familia es un trabajo importante. La indexación de estas comunicaciones es un problema no resuelto. Manejar el conocimiento acumulado es un reto para la profesión de médico de familia. Análisis de la presentación de resúmenes para Wonca Europe 2007, APMF Covilha 2013 (po), CNGE (fr) 2013 y 2014, Swiss Family Physician 2014 Medicina de Familia Belga en 2014 se llevó a cabo por tablas Excel después usando el software de análisis cualitativo ATLAS .ti. Se seleccionaron los códigos para la identificación de los conceptos clínicos en la Clasificación Internacional de Atención Primaria (CIAP-2) y los Q-Codes, una herramienta de clasificación personal para la identificación de los conceptos no clínicos . La codificación era manual, y por un solo observador. Resúmenes de la conferencia CNGE Lille en 2014 se pusieron a disposición cuando están disponible en línea y han sido analizados antes de la conferencia y discutido en este Se analizaron aproximadamente 1.600 resúmenes. Este análisis demuestra la posibilidad de utilizar la Clasificación Internacional de Atención Primaria (CIAP-2) para identificar problemas clínicos discutidos por los participantes. También se crea una lista de 190 conceptos discutidos por médicos de familia europeos. 190 conceptos se clasifican en una lista de autoridad y se llaman Q-Codes. La letra Q ha sido escogido por no ser utilizada en ICPC. Juntos, ICPC y Q-Codes forman una clasificación denominada 3CGP. Los resúmenes codificados se introducirán en sistema de gestión de conferencias expresado en smartphone y sitio web. El análisis de estos conceptos se inició con la ayuda de médicos de familia colegas de Brasil, España, Argentina y Uruguay. La correspondencia con el sistema de MeSH de Medline se busca en www.hetop.eu . Ayuda de BIREME, el Centro Latinoamericano de la OPS que mantiene los descriptores DeCS se obtuvo en especial para los conceptos sin correspondencia con MeSH. Médicos de familia voluntarios para participar en el estudio terminológico y bibliografía de los conceptos de estudio son bienvenidos. La lista de los 190 conceptos identificados en 2014 está disponible en Inglés, francés, español y portugués en http://docpatient.net/3CGP/Q-codes_multil20141126.pdf [less ▲]

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See detailCarbon dioxide and vegetable ooil for the synthesis of bio-based polymer precursor
Alves, Margot ULg; Méreau, Raphaël; Grignard, Bruno ULg et al

Conference (2015, March 18)

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See detail«Viejismo » y prácticas profesionales : cuáles son las consecuencias para la persona mayor con discapacidad intelectual?
Clesse, Audrey ULg; Missotten, Pierre ULg; Richard, Ulrich et al

Conference (2015, March 18)

En Europe, nous avons une image négative du vieillissement : l’âge (le fait d’avoir plus de 55 ans) apparaît comme le facteur de discrimination le plus important, avant le sexe, l’origine ethnique ou la ... [more ▼]

En Europe, nous avons une image négative du vieillissement : l’âge (le fait d’avoir plus de 55 ans) apparaît comme le facteur de discrimination le plus important, avant le sexe, l’origine ethnique ou la religion (Eurobaromètre, 2012). L’âgisme – le fait de transmettre des stéréotypes négatifs en lien avec l’âge – influence de manière négative la santé mentale et physique de la personne discriminée (Levy, 2003; Levy et al., 2009), mais également ses interactions avec les autres (Williams et al., 2003; 2009). A l’heure actuelle, une personne porteuse d’une trisomie 21 vit en moyenne jusqu’à 55 ans, alors qu’elle vivait jusqu’à l’âge de 20 ans en 1929 (Bittles & Glasson, 2004). Cette nouvelle longévité pose de nouveaux défis inédits, tantôt pour les personnes avec déficience, que pour les famille et les professionnels du domaine : rythme différent, diminution des capacités, apparition de maladies dégénératives, etc. Autant de changements qui nécessitent une adaptation des pratiques dans les services sociaux (McGhee & Dorsett, 2011; Wark et al., 2014), entre autres les comportements et les attitudes véhiculés par l’âgisme. Par exemple, nous parlons plus lentement, plus fort et avec un vocabulaire plus simple lorsque nous communiquons avec une personne âgée. Ces changements verbaux, appelés « elderspeak » (Williams et al., 2003; 2009), influencent également les capacités de communication de la personne âgée (bégaiement, anxiété, etc) et son estime de soi, créant ainsi un effet circulaire. Notre recherche s’intéresse à la vision que possèdent les professionnels du vieillissement de la personne handicapée, ainsi qu’à son impact sur cet effet circulaire. [less ▲]

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See detailEtude des propriétés moussantes de la sève du palmier dattiers (Phoenix Dactylifera L.)
Makhlouf, Ines; Razafindralambo, Hary; Attia, Hamadi et al

Conference (2015, March 17)

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See detailFlapping around in a wind tunnel
Dimitriadis, Grigorios ULg

Conference (2015, March 17)

Aerodynamic investigations of animal flight have usually concentrated on static conditions. These are good enough to analyse gliding flight but not other types of flight, such as cruise (migrations), take ... [more ▼]

Aerodynamic investigations of animal flight have usually concentrated on static conditions. These are good enough to analyse gliding flight but not other types of flight, such as cruise (migrations), take-off and landing or manoeuvres. In this work we present wind tunnel experiments on geese flying in a wind tunnel and unsteady aerodynamic simulations of these flights, based on the Vortex Lattice Method. [less ▲]

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See detailEffets de l'hydrolyse enzymatique sur propriétés fonctionnelles et conformationnelles des isolats proteiques de pois chiches
Mokni Ghribi, Abir; Maklouf Gafsi, Ines; Sila, Assaad et al

Conference (2015, March 16)

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See detailStofftransport an Einzeltropfen mit Konzentrationsprofil in der kontinuierlichen Phase
Cvetkovic, E; Pfennig, Andreas ULg

Conference (2015, March 16)

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See detailImages et rituel : l’exemple des pinakes de Locres Épizéphyrienne
Collard, Hélène ULg

Conference (2015, March 14)

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See detailThe role of personal goals in episodic future thought
D'Argembeau, Arnaud ULg

Conference (2015, March 14)

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See detailLa prevención cuaternaria en la clínica cotidiana.
Jamoulle, Marc ULg; Bernstein, Jorge; Pizzanelli, Miguel et al

Conference (2015, March 14)

Remue méninge sur les développements futur du concept de prévention quaternaire

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See detailÉtude d’une stratégie diplomatique: l’internonce Antonio Bichi et l’absolution de Charles IV de Lorraine (1645)
Regibeau, Julien ULg

Conference (2015, March 13)

Le 22 décembre 1645, l’internonce en poste à Bruxelles, Antonio Bichi, donne l’absolution à Charles IV de Lorraine . La sentence prononcée par l’envoyé pontifical doit mettre fin à plus de trois années de ... [more ▼]

Le 22 décembre 1645, l’internonce en poste à Bruxelles, Antonio Bichi, donne l’absolution à Charles IV de Lorraine . La sentence prononcée par l’envoyé pontifical doit mettre fin à plus de trois années de tensions qui font suite à la bulle d’excommunication fulminée par le pape Urbain VIII à l’encontre du duc. Pour le Saint-Siège l’enjeu diplomatique de ce geste est grand. Charles IV, duc de Lorraine et de Bar, est en effet un membre important du parti des dévots, hostile à Richelieu et à sa politique d’abaissement de la maison d’Autriche. Réfugié aux Pays-Bas depuis l’occupation de ses états par le cardinal, en 1634, il prend part aux dernières phases de la guerre de Trente Ans en mettant ses troupes au service des Habsbourg, aussi bien en France que dans l’Empire. Or, l’excommunication du duc comme la mauvaise volonté dont celui-ci semble faire preuve pour répondre aux exigences de la Curie romaine ont peu à peu créé des dissensions au sein du clergé et du gouvernement des Pays-Bas. L’irritation qui règne menacerait même la bonne conduite de la guerre menée contre la France et ses alliés protestants. Si, à première vue, la papauté ne prend pas une part active dans ce conflit, elle veille naturellement, à travers ses nonces, aux intérêts catholiques qui sont en jeu. J'ai choisi, à l’occasion de ce colloque, d'étudier plus en détail la conduite de l’internonce Bichi dans le retour en grâce de Charles IV et son absolution en 1645. À cette occasion, j'ai voulu dégager, d’une part, les stratégies mises en place par le prélat pour arriver à ses fins (maîtrise de l’information, entreprise de désinformation et de dénigrement du duc,…) et, d’autre part, les acteurs et les réseaux avec lesquels il est en prise lors de ces négociations (gouvernement des Pays-Bas espagnols, confesseurs, parti des dévots, ordres religieux, Saint Office,…). Une telle analyse devrait permettre de saisir la nature et l’étendue des ressources que l’internonce utilise afin de mener une véritable politique de détente, propre à réconcilier les intérêts politico-religieux et les intérêts juridico-dogmatiques du Saint-Siège. Je désirerais, par cet exercice apporter une contribution à la compréhension de la politique menée par les nonces du Saint-Siège lors de la fin de la guerre de Trente Ans et à l’occasion des Congrès de Westphalie ; moments diplomatiques habituellement considérés par l’historiographie comme étant défavorables à la papauté. [less ▲]

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See detailJustice révolutionnaire v. justice d’Etat. Les années de plomb en Italie, entre représentations cinématographiques et représentations juridiques
Thirion, Nicolas ULg; Pasteger, David ULg

Conference (2015, March 13)

La présente contribution a une double ambition : d’une part, étudier, illustrations cinématographiques à l’appui, l’acte de juger et ses prodromes (enquêtes, procédures, interrogatoires, etc.), dans un ... [more ▼]

La présente contribution a une double ambition : d’une part, étudier, illustrations cinématographiques à l’appui, l’acte de juger et ses prodromes (enquêtes, procédures, interrogatoires, etc.), dans un contexte géographique et historique bien déterminé – en l’espèce, l’Italie des années de plomb – ; d’autre part, examiner les situations ainsi rencontrées à la lumière d’une théorie du droit – en l’occurrence, la théorie de la pluralité des ordres juridiques de Santi Romano – particulièrement éclairante pour comprendre les ressorts de la lutte à laquelle se livrèrent, dans ce cadre, organisations subversives, voire terroristes, et forces étatiques, aussi bien d’un point de vue historique que dans les représentations plus ou moins fidèles qui en ont été faites dans le corpus cinématographique retenu pour les besoins de la démonstration. [less ▲]

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See detailLe et la cache. De quelques documentaires qui rendent visibles sans montrer.
Hamers, Jérémy ULg

Conference (2015, March 13)

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See detailDu travestissement à la traversée. À propos d’un bas-relief romain
Veymiers, Richard ULg

Conference (2015, March 13)

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See detailL’intégration des Marocains en Belgique, un processus tripartite
Gsir, Sonia ULg

Conference (2015, March 12)

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See detailSe "faire manger" par l'Autre. Stratégies féminines de définition de soi en contexte public.
Mescoli, Elsa ULg

Conference (2015, March 12)

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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