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See detailLe voyage politique du Technology Assessment
Delvenne, Pierre ULg

Scientific conference (2013, October 05)

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See detailSoil classification, map legends and GIS logic: experiences from converting the legend of the soil map of Belgium into WRB
Dondeyne, Stefaan; Legrain, Xavier ULg; Deckers, Jozef et al

Conference (2013, October 04)

A systematic soil survey of Belgium was conducted from 1948 to 1991. The purpose was to have a soil information base adequate for boosting agricultural production after the Second World War. Field surveys ... [more ▼]

A systematic soil survey of Belgium was conducted from 1948 to 1991. The purpose was to have a soil information base adequate for boosting agricultural production after the Second World War. Field surveys were done at the detailed scale of 1:5000, while the maps were published at a 1:20,000 scale. To enable soil surveyors to identify soils in the field, an original soil classification was developed based on readily observable physical and morphogenetic characteristics. Within the European Union, the World Reference Base (WRB) for Soil Resources (IUSS Working Group WRB, 2007), has been adopted as the common classification system. As soil surveys in most European countries were conducted independently, the challenge now is to convert the national legends into a common WRB legend. In Belgium, such a conversion is being implemented and we present some lessons learned in relation to classification and map legends. The legend of the soil map of Belgium is based primarily on soil texture, drainage status and profile development. “Soil series” are defined in an open and non-hierarchical structure by combining these three categorical variables, and to which modifiers can be added such as parent material, stoniness or depth to a substratum. The WRB-2007 classification is based on diagnostic features defined by morphological, physical and chemical properties. The conversion of the legend of the soil map of Belgium to WRB is based on insights gained from classifying, so far, more than 360 legacy soil profiles in combination with field observations. From these insights, heuristic rules have been deduced regrouping soil series into Reference Soil Groups (RSG) and for which some qualifiers could also be identified. Other qualifiers were determined by relying on databases of the legacy soil profiles. To take regional variability into account, the conversion is done by physiographic zone. Converting the legend of the soil map of Belgium to WRB actually leads to a regrouping of soil series into broader WRB categories and which can neatly be represented on 1:50,000 scale maps. Hence, it does not imply substituting one classification with another one. Users, who would need the detailed information, can still refer to the detailed symbols of the soil series. The regrouping of soil series has been made possible thanks to the flexibility of WRB for combining various qualifiers. However, as the WRB-2007 classification leads to a varying number of qualifiers it is less practical for constructing map legends. Therefore, the WRB-2010 guidelines (IUSS Working Group WRB, 2010) propose to organise qualifiers in main and optional ones with priority rules for the main qualifiers. As illustrated in Table 1, this approach may highlight, or hide, some qualifiers inconsistently. When for example only two qualifiers are retained in a map legend, the qualifier Endogleyic of stony, poorly drained Albic Podzols will not be indicated, while it will be indicated when such soils are not stony (Table 1). Moreover, the proposed hierarchy is sometimes also inconsistent when compared across Reference Soil Groups (RSG) as illustrated for the Arenosols and Regosols (Table 1). These drawbacks could be avoided if qualifiers would be organised into thematic groups ― such as profile development, texture, drainage, depth of substratum and fertility ― rather than by ranking them. Grouping qualifiers thematically would have the advantage to give more flexibility to the map user working with GIS, and indeed, it would render WRB a more “GIS logic” classification system. [less ▲]

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See detailThe multiple spots of the Ganymede auroral footprint
Bonfond, Bertrand ULg; Hess, Sébastien; Bagenal, Fran et al

in Geophysical Research Letters (2013), 40

The interaction between the moons and the magnetosphere of giant planets sometimes gives rise to auroral signatures in the planetary ionosphere, called the satellite footprints. So far, footprints have ... [more ▼]

The interaction between the moons and the magnetosphere of giant planets sometimes gives rise to auroral signatures in the planetary ionosphere, called the satellite footprints. So far, footprints have been detected for Io, Europa, Ganymede, and Enceladus. These footprints are usually seen as single spots. However, the Io footprint, the brightest one, displays a much more complex morphology made of at least three different spots and an extended tail. Here we present Hubble Space Telescope FUV images showing evidence for a second spot in the Ganymede footprint. The spots separation distance changes as Ganymede moves latitudinally in the plasma sheet, as is seen for the Io footprint. This indicates that the processes identified at Io are universal. Moreover, for similar Ganymede System III longitudes, the distance may also vary significantly with time, indicating changes in the plasma sheet density. We identified a rapid evolution of this distance 8 days after the detection of a volcanic outburst at Io, suggesting that such auroral observations could be used to estimate the plasma density variations at Ganymede. [less ▲]

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See detailLanguage(s) and identity/ies in Belgium: which consequences for the cooperation between communities?
Dassargues, Alix ULg

Scientific conference (2013, October 04)

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See detailGenre, stéréotypes sexués et enjeux de la violence à l'adolescence
Gavray, Claire ULg

Scientific conference (2013, October 04)

présentations de divers résultats de recherche quantitative et qualitative auprès d'adolescents montrant une genèse du passage à l'acte violent violent différente selon le groupe sexué ainsi que des ... [more ▼]

présentations de divers résultats de recherche quantitative et qualitative auprès d'adolescents montrant une genèse du passage à l'acte violent violent différente selon le groupe sexué ainsi que des enjeux spécifiques à la clef. Les résultats laissent voir le genre en action, dont l'impact des assignations sexuées . Par contre, les mécanismes psychosociaux d'adoption de valeurs et de comportements violents sont comparables : pas de' psychologie' spécifique des filles et des garçons... [less ▲]

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See detailTourisme rural : le parent pauvre du financement des activités en milieu rural camerounais
Lekane Tsobgou, Dieudonné ULg; MEDIEBOU CHINDJI, Rose

Conference (2013, October 04)

Le tourisme en général et le tourisme rural est une activité économique en plein essor dans le monde. Au Cameroun par exemple, les espaces ruraux regorgent de nombreuses destinations touristiques, ainsi ... [more ▼]

Le tourisme en général et le tourisme rural est une activité économique en plein essor dans le monde. Au Cameroun par exemple, les espaces ruraux regorgent de nombreuses destinations touristiques, ainsi que de fortes potentialités naturelles et culturelles à promouvoir. 2/3 des citadins retournent fréquemment dans leur terroir pour diverses raisons et dépensent d’énormes sommes d’argent d’où l’intérêt pour les promoteurs d’activités touristiques de capter cette masse et ce flux monétaire. L’abandon des plans quinquennaux, la disparition de la Société Camerounaise du Tourisme (Socatour), du Fond National pour le Développement Rural (Fonader) et du Fonds de Garantie et d’Assistance aux Petites et Moyennes Entreprises (Fogape) depuis la décennie 1990 ont créé dans le secteur du tourisme rural, une grave crise de financement et d’encadrement des acteurs et de leurs activités. La forte mobilisation des ressources financières venant des institutions étatiques, de la coopération internationale, des comités de développement locaux (Kengne Fodouop et Dejon 2003), les élites (Elong 2012) et des acteurs micro financiers privés oriente 90% des lignes de crédit ou du financement rural en direction des projets agricoles et commerciaux (Lekané 2011., Tchékoté 2012) et non vers les activités du tourisme. Pourtant, Le tourisme rural au Cameroun serait une opportunité intéressante dans le processus du développement local (Onomo 2009, Kimbu 2012). A ce titre, il constitue un gisement intarissable d’emplois dans l’hébergement, la restauration, le transport, le marketing et la commercialisation des destinations, etc… La segmentation de cette activité en milieu rural devrait favoriser la création de richesse (DSCE, 2010). Qu’est ce qui explique le fait qu’après une quarantaine d’années de financement du monde rural, le secteur du tourisme continue de chercher en vain « l’argent chaud » susceptible de promouvoir durablement ses activités ? Comment comprendre l’abandon d’un secteur pourtant intégrateur de l’économie rurale au Cameroun? Est-il possible d’assurer la durabilité du financement des espaces ruraux afin de mieux commercialiser et rentabiliser les ressources naturelles et culturelles qui s’y trouvent [less ▲]

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See detailHolocaust postmemory and the legacy of un-death in Nicole Krauss’ Great House
Munos, Delphine ULg

Conference (2013, October 03)

In an interview closely following on the release of The History of Love, Krauss made it clear that, contrary to what some critics had ventured, her second novel was not about Holocaust survivors. “I am ... [more ▼]

In an interview closely following on the release of The History of Love, Krauss made it clear that, contrary to what some critics had ventured, her second novel was not about Holocaust survivors. “I am the grandchild of people who survived that historical event,” Krauss pointed out. “I’m not writing their story – I couldn’t write their story […]. What interests me is the response to catastrophic loss.” Great House, Krauss’s third novel, can be seen to further investigate this “response to catastrophic loss” – in a way which makes only tangential and mediated references to the Holocaust. The novel spans eighty years, starting from the near-end of World War 2, and traces the passing-on of a desk of massive proportions. Complete with nineteen drawers, one of which remains locked until it is symbolically revealed to be empty at the close of the book, the desk operates as some kind of trans-historical fetish for most of its successive keepers (and aspiring acquirers). Narrated through a set of five characters whose lives prove overshadowed less by the Holocaust itself than by its felt resonances in the psyches of loved ones, Great House is a polyphonic work that raises questions about the anatomy of ‘Holocaust postmemory’ (Marianne Hirsch), its temporality, but also its reification in conformity with defense mechanisms that take the form of death-denying fantasies. Here, while turning to the past, some clearly unreliable first-person narrators reveal their lifelong investment in fetishizing memories of themselves and others so as to better keep all sense of temporality and mortality at bay – in a way suggesting that fantasies of un-death have helped them fill in the gap left by the unspeakable horror of the Holocaust, and were later transmitted in lieu of ‘memory proper’. This paper will thus focus on Great House’s rich imagery, and its narrative strategies, in order to investigate Krauss’ representation of the paradoxes of Holocaust postmemory. [less ▲]

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See detailMeasuring Effects of Reflection on Learning: A Physiological Study
QI, Wen; Verpoorten, Dominique ULg; Westera, Wim

Conference (2013, October 03)

As an economical and feasible intervention, reflection demands learners using critical thinking to examine presented information, questioning its validity, and drawing conclusions based on the resulting ... [more ▼]

As an economical and feasible intervention, reflection demands learners using critical thinking to examine presented information, questioning its validity, and drawing conclusions based on the resulting ideas during a learning process. The aim of this study is to gain insight into the effects of practicing short, frequent and structured reflective breaks that are interspersed with the reading process of a learning material. It tries to reveal whether physiological signals can be used as appropriate indicators to reveal the actual changes of cognitive states while introducing different reflective breaks during learning. The recorded physiological signals include skin temperature, blood volume pulse, pulse volume amplitude, and pulse rate. The results show that while these embedded “reflection rituals” did not affect learners’ performance they had significantly impact on time on task, perceived learning and those learners' physiological (cognitive) states. Physiological data returned significant differences between the reading and reflection activity. Measurements of temperature and pulse rate are lower when covering the course equipped with additional reflection affordances while blood volume pulse and pulse volume amplitude are higher. In addition, applying statistics analysis to the physiological data exhumes significant differences between different types of reflection activities for those measurements including skin temperature, pulse volume amplitude and pulse. [less ▲]

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See detailDynamic Simulation of Large-scale Power Systems Using a Parallel Schur-complement-based Decomposition Method
Aristidou, Petros ULg; Fabozzi, Davide; Van Cutsem, Thierry ULg

in IEEE Transactions on Parallel and Distributed Systems (2013)

Power system dynamic simulations are crucial for the operation of electric power systems as they provide important information on the dynamic evolution of the system after an occurring disturbance. This ... [more ▼]

Power system dynamic simulations are crucial for the operation of electric power systems as they provide important information on the dynamic evolution of the system after an occurring disturbance. This paper proposes a robust, accurate and efficient parallel algorithm based on the Schur complement domain decomposition method. The algorithm provides numerical and computational acceleration of the procedure. Based on the shared-memory parallel programming model, a parallel implementation of the proposed algorithm is presented. The implementation is general, portable and scalable on inexpensive, shared-memory, multi-core machines. Two realistic test systems, a medium-scale and a large-scale, are used for performance evaluation of the proposed method. [less ▲]

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See detailVers une méthode de conception de SIG 3D collaboratif
Hajji, Rafika ULg

Doctoral thesis (2013)

Our thesis work focuses on collaborative 3D GIS and considers two main aspects governing their implementation: a conceptual framework for an approach to design these systems and a technical framework ... [more ▼]

Our thesis work focuses on collaborative 3D GIS and considers two main aspects governing their implementation: a conceptual framework for an approach to design these systems and a technical framework dealing with the main issues of integration of multiple data sources from different partners in a 3D collaborative database. [less ▲]

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See detailRetirement and the onset of Alzheimer's disease: The ICTUS study
Grotz, Catherine ULg; Letenneur, luc; Bonsang, Eric et al

Conference (2013, October 03)

Detailed reference viewed: 18 (3 ULg)
See detailLocal perceptions and attitudes towards synanthrope long-tailed macaques (Macaca fascicularis) living in Padangtegal Monkey forest, Bali (Indonesia)
Brotcorne, Fany ULg; Paquay, Leila; Wandia, I.Nengah et al

Conference (2013, October 03)

The sympatric relationship between humans and other primates in interface zones is a contemporary widespread phenomenon. The expanding landscapes anthropization leads to an intensification of human-other ... [more ▼]

The sympatric relationship between humans and other primates in interface zones is a contemporary widespread phenomenon. The expanding landscapes anthropization leads to an intensification of human-other primate interactions ranging from conflict to co-operation scenarios. Our study investigated the commensal relationships between long-tailed macaques and humans at the tourist Padangtegal Monkey Forest. We present here results related to human-macaque interactions and local people’s perceptions and attitudes towards the latter. We used ethological methods to quantify the nature of the interactions and we conducted a questionnaire survey to identify the macaques’ status in local public opinion. 99 respondents (62 males and 37 females) were selected in a radius of 2km around the Monkey Forest. Perceptions and attitudes were explicitly measured on self-reports and were attributed to a 4 point score. Macaques interacted with humans for 1.1% of their activity budget and these interactions were mostly aggressive (0.6%), food-related (0.4%) or neutral (0.1%). 80% of the aggressive interactions were initiated by humans but the majority aimed at protecting crops and properties from macaques’ incursions. Overall, most of the respondents had positive perceptions and attitudes towards macaques, except neighbouring landowner farmers who suffered from crop damage. Despite nuisances caused by macaques, the majority of the interviewees reported to derive compensatory economic and cultural benefits from their relationships with macaques. The religious and economic contexts might explain the high tolerance level towards macaques that represents a source of hope for a sustainable coexistence, although some management strategies minimizing crop damage still need to be reinforced. [less ▲]

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See detailDosages quantitaifs de principes actifs dans les formes solides par spectroscopie proche infrarouge: Application pratique au test d'uniformité de teneur des comprimés
Ginot, Yves-Michel; Bernard-Moulin, Patrick; Boiret, Mathieu et al

Conference (2013, October 03)

L'augmentation du nombre de dosages à réaliser dans l'industrie pharmaceutique conduit à rechercher des méthodes alternatives. La spectroscopie proche infrarouge répond précisément à cette demande en ... [more ▼]

L'augmentation du nombre de dosages à réaliser dans l'industrie pharmaceutique conduit à rechercher des méthodes alternatives. La spectroscopie proche infrarouge répond précisément à cette demande en permettant des dosages rapides, non destructifs et respectueux de l'environnement. Le texte publié dans SFSTP Pharma Pratiques en 2010 énonçait la méthodologie à suivre pour développer une technique de dosage de substance active dans une formulation solide de type comprimé par spectroscopie proche infrarouge. Il est apparu intéressant d'illustrer et de compléter les différentes étapes de cette méthodologies au travers d'exemples. [less ▲]

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See detailDevelopment of Thiophenic Analogues of Benzothiadiazine Dioxides as New Powerful Potentiators of 2-Amino-3-(3-hydroxy-5-methylisoxazol-4-yl)propionic Acid (AMPA) Receptors
Francotte, Pierre ULg; Goffin, Eric ULg; Fraikin, Pierre et al

in Journal of Medicinal Chemistry (2013), 56(20), 7838-7850

On the basis of the results obtained in previous series of AMPA potentiators belonging to 3,4-dihydro-2H-benzo- and 3,4-dihydro-2H-pyrido-1,2,4-thiadiazine 1,1-dioxides, the present work focuses on the ... [more ▼]

On the basis of the results obtained in previous series of AMPA potentiators belonging to 3,4-dihydro-2H-benzo- and 3,4-dihydro-2H-pyrido-1,2,4-thiadiazine 1,1-dioxides, the present work focuses on the design of original isosteric 3,4-dihydro-2H-thieno-1,2,4-thiadiazine 1,1-dioxides. Owing to the sulfur position, three series of compounds were developed and their activity as AMPA potentiators was characterized. In each of the developed series, potent compounds were discovered. After screening the selected active compounds on a safety in vivo test, 6-chloro-4-ethyl-3,4-dihydro-2H-thieno[2,3-e]-1,2,4-thiadiazine 1,1-dioxide (24) appeared as the most promising compound and was further evaluated. Its effects on long-term potentiation in vivo and on AMPA-mediated noradrenaline release were measured to predict its potential cognitive enhancing properties. Finally, an object recognition test performed in mice revealed that 24 was able to significantly enhance cognition, after oral administration, at doses as low as 0.3 mg/kg. This study validates the interest of the isosteric replacement of the benzene or pyridine nuclei by the thiophene nucleus in the ring-fused thiadiazine dioxides class of AMPA potentiators. [less ▲]

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See detailMolecular dynamic simulations of a beta amphiphilic peptide
Crowet, Jean-Marc ULg; Deschamps, Antoine; Soumillion, Patrice et al

Conference (2013, October 03)

Detailed reference viewed: 26 (7 ULg)
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See detailHow did endemic cyprinids and exotic european catfish move in a large river ecosystem?
Capra, Hervé; Pella, Hervé; Ovidio, Michaël ULg

Conference (2013, October 03)

Detailed reference viewed: 10 (0 ULg)