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See detailRobust and Computationally Efficient Dynamic Simulation of ORC Systems: The ThermoCycle Modelica Library
Quoilin, Sylvain ULg; Desideri, Adriano ULg; Bell, Ian ULg et al

Conference (2013, October 07)

The ThermoCycle library, an open-source library for dynamic modeling of ORC systems, has been recently developed in the Modelica language and is presented in this paper. Special attention has been paid to ... [more ▼]

The ThermoCycle library, an open-source library for dynamic modeling of ORC systems, has been recently developed in the Modelica language and is presented in this paper. Special attention has been paid to robustness and to simulation speed. Dynamic simulations are indeed often limited by numerical constraints and failures, either during initialization or during integration. Furthermore, the use of complex equations of state (EOS) to compute thermodynamic properties dramatically decreases the simulation speed. In this paper, the different numerical methods developed to overcome these limitations are presented and discussed and the proposed models are then benchmarked against alternative simulation tools. [less ▲]

Detailed reference viewed: 147 (10 ULg)
See detailL’interdisciplinarité comme posture impliquée et indisciplinée, créative et coopérative.
Denayer, Dorothée ULg; Levain, Alix; Coutellec, Leo et al

Conference (2013, October 05)

Detailed reference viewed: 14 (1 ULg)
See detailFrom One Loop To Another: From Minimalism To Indie Rock
Levaux, Christophe ULg

Conference (2013, October 05)

Detailed reference viewed: 24 (2 ULg)
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See detailBlood pressure dipping and arterial stiffness in kidney transplant recipients
XHIGNESSE, Patricia ULg; Saint-Remy, Annie ULg; BONVOISIN, Catherine ULg et al

Conference (2013, October 05)

In 70 kidney transplant recipients, nocturnal blood pressure(BP) nondipping (nondipping or reversed rhythm) was highly frequent (48% were nondippers and 29% had a reversed rhythm). When compared dippers ... [more ▼]

In 70 kidney transplant recipients, nocturnal blood pressure(BP) nondipping (nondipping or reversed rhythm) was highly frequent (48% were nondippers and 29% had a reversed rhythm). When compared dippers, nondippers and reversed, neither BMI, time on hemodialysis, graft survival, eGFR or antihypertensive drugs allowed to distinct the three groups. Pulse Wave Velocity (PWV) did not differ between groups but calcification score and ambulatory arterial stiffness index (AASI) were significantly the highest in récipients with reversed rhythm. That was also the case in nondippers recipients. [less ▲]

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See detailPastoral dynamics in the Region of Diffa (Niger) : a descriptive analysis of livestock capital
Rouchet, François ULg; Abdoulkadri, Laouali; Lebailly, Philippe ULg et al

Conference (2013, October 05)

Detailed reference viewed: 20 (8 ULg)
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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 detailConvective Drying of Mixtures of Sewage Sludge and Sawdust in a Fixed Bed
Li, Jie ULg; Fraikin, Laurent ULg; Salmon, Thierry ULg et al

Conference (2013, October 04)

This work is part of a project aiming at developing a renewable fuel for gasification purposes, through the convective drying of sludge/wood mixtures. The first step consists in characterizing the drying ... [more ▼]

This work is part of a project aiming at developing a renewable fuel for gasification purposes, through the convective drying of sludge/wood mixtures. The first step consists in characterizing the drying behaviour of sludge/sawdust mixtures, in a convective fixed bed dryer. In particular, the influence of the mixing step (no mixing against 30 s at 40 rpm) and the sawdust/sludge ratio (1/9, 2/8, 3/7 and 4/6 on a dry basis) have been investigated, as well as the drying temperature (50 °C, 80 °C and 110 °C). As showed in a previous work, the addition of dry matter into sludge has an impact on the initial 3D structure of the bed of extrudates to be dried. Moreover, it is well known that the volume shrinkage occurring during sludge drying will affect the drying velocity. In this study, X-ray tomography, a non-invasive imaging technique, is used to assess changes in volume, porosity and exchange surface between the beginning and the end of the drying process. Results first confirm the importance of the mixing step on the drying behaviour: the drying rate of the mixed sludge is slower than the one of original sludge. Nevertheless the addition of sawdust is shown to have a positive impact on the drying process from mass ratio of 2/8, with observed drying rates higher than for the original sludge. During the whole drying process, the volume and exchange surface of the sample increase and the porosity decreases as the mass ratio increases. These results indicate that the air and the sample contact more fully with more sawdust addition, resulting from bed expansion and exchange surface increase. Hence, the heat and mass transfer efficiency between the air and the material increases and consequently the drying rate. Further work will be done in order to assess the impact of the drying temperature and to characterize the behaviour of these samples during pyrolysis using thermo gravimetric analysis. [less ▲]

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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 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 ▲]

Detailed reference viewed: 27 (0 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 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: 20 (3 ULg)
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 ▲]

Detailed reference viewed: 57 (1 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: 11 (0 ULg)
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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 ▲]

Detailed reference viewed: 45 (2 ULg)
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: 28 (7 ULg)
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See detailBluetongue Virus RNA Detection by Real-Time RT-PCR in Post-Vaccination Samples from Cattle
De Leeuw, Ilse; Garigliany, Mutien-Marie ULg; Bertels, Guido et al

Conference (2013, October 02)

Detailed reference viewed: 7 (1 ULg)
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See detailComparison of 3 emerging optical NDI techniques on complex shaped composite structures based on carbon fiber
Georges, Marc ULg

Conference (2013, October 01)

Thermography, shearography and laser ultrasonics are 3 contactless emerging techniques which allow nondestructive inspection of composite structures. Thermography and shearography are full-field ... [more ▼]

Thermography, shearography and laser ultrasonics are 3 contactless emerging techniques which allow nondestructive inspection of composite structures. Thermography and shearography are full-field techniques yielding measurement of respectively local temperature variations or deformations of a structure undergoing a stress (thermal, pressure, vibration). Laser ultrasonics allows remote ultrasound generation in the composite by thermoelastic effect followed by remote measurement of the surface displacements under the effect of the ultrasound echoes without coupling. This point-like technique requires scanning. The three techniques have been selected in our project since they allow inspection of complex shaped parts. We present compared results obtained on a variety of aeronautical industrial composite parts. [less ▲]

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See detailComment concilier médecine factuelle et médecine personnalisée en pratique clinique
Krzesinski, Jean-Marie ULg

Conference (2013, October 01)

Médecine factuelle (EBM) et médecine personnalisée : définition, avantages et limites. Cas cliniques exemplatifs dans l'HTA

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See detailBiodiversité et observation participative en ligne : modèle et enjeux de la plateforme Observations.be
Farah, Jihad ULg

Conference (2013, October)

Dans cette intervention, nous posons la question de la métamorphose des rapports entre citoyens et institutions suite au développement des NTIC, à travers l’exemple de la plateforme d’observation de la ... [more ▼]

Dans cette intervention, nous posons la question de la métamorphose des rapports entre citoyens et institutions suite au développement des NTIC, à travers l’exemple de la plateforme d’observation de la biodiversité Observations.be et de l’Institut Bruxellois de Gestion de l’Environnement à Bruxelles (IBGE). Nous nous intéressons surtout à voir si, comme le signale Charvolin (2009), une meilleure maîtrise des pratiques de la recherche – dans notre cas à travers les NTIC – peut réellement mettre à pied d’égalité amateur et expert. Nos réflexions ici s’appuient sur des entretiens, notamment auprès des gestionnaires du dossier biodiversité à l’IBGE et des administrateurs d’Observations.be, ainsi que sur l’analyse des fonctionnalités du site lui-même. [less ▲]

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See detailModeling cell/matrix growth in three dimensional scaffolds under dynamic culture conditions
Guyot, Yann ULg; Papantoniou, Ioannis; Chai, Yoke Chin et al

Conference (2013, October)

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See detailAdvances in the hunt for cadaveric decomposition VOC profiling
Stefanuto, Pierre-Hugues ULg; Stadler, S; Pesesse, R et al

Conference (2013, October)

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See detailDemystifying Comprehensive GC
Focant, Jean-François ULg

Conference (2013, October)

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See detailWhere is the Conflict? Delving in Walloon Science, Technology and Innovation Politics
Charlier, Nathan ULg; Thoreau, François ULg

Conference (2013, October)

Building on preliminary empirical observations, this paper seeks to analyze a specific feature of science, technology and innovation (STI) policies in Wallonia (Belgium); that is, the apparent lack of ... [more ▼]

Building on preliminary empirical observations, this paper seeks to analyze a specific feature of science, technology and innovation (STI) policies in Wallonia (Belgium); that is, the apparent lack of contestation regarding policy making. Over the last decade, multiple programs and plans were implemented by the regional government. These reforms of STI policy are endorsed by multiple stakeholders, including parliamentary opposition, labor unions and employers’ organizations. Seemingly, Walloon STI policies do not configure as conflict zones. This is remarkable since these programs and plans reconfigure the relationship between science, technological innovation and the market. In other policy fields, opposition is more pronounced and protracted. In other places/times, STI policy is/has been a conflicting matter. This is all the more striking in a context of strategic science advent, where STI is placed at the heart of large regional policy project, building strong ties with economic development and regional identity shaping. Can STS provide the tools and vocabulary to analyze non-conflictual, « cold » situations such as current STI policies and their evolution in Wallonia? Building on semi-structured interviews with key informants, our analysis will pay attention to Walloon contextual specificities as well as macro-level considerations: can dominant, taken-for-granted master narratives such as “knowledge-based economy”, “Regional innovation systems”, or, more recently, “open and responsible innovation” account for the relative smoothness of STI policies? We conclude that there is a felt need for empirical insights to analyze how these master narratives are locally enacted. [less ▲]

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See detailRobust SFC method optimization using design space strategy
Dispas, Amandine ULg; Lebrun, Pierre ULg; Hubert, Philippe ULg

Conference (2013, October)

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See detailEtude de la conduction nerveuse motrice et sensitive aux membres supérieurs et inférieurs
WANG, François-Charles ULg; LEJEUNE, Thierry

Conference (2013, October)

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See detailAn agro-economic characterizaton of the Niger household : case of Tahoua
Rouchet, François ULg; Moussa dit Kalamou, Mahamoudou; Andres, Ludovic ULg et al

Conference (2013, October)

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See detailProtection effects or natural variability? The case of seagrass amphipods
Sturaro, Nicolas ULg; Lepoint, Gilles ULg; Pérez-Perera, Amanda et al

Conference (2013, October)

Detailed reference viewed: 20 (11 ULg)
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See detailCassini UVIS Saturn Auroral Images from the 2013 HST/Cassini Campaign
Pryor, Wayne; Jouchoux, Alain; Esposito, Larry et al

Conference (2013, October)

In 2013 coordinated observations of Saturn by the Cassini spacecraft and Hubble Space Telescope (HST) were obtained. During these observations the Cassini spacecraft provided a high-latitude view of ... [more ▼]

In 2013 coordinated observations of Saturn by the Cassini spacecraft and Hubble Space Telescope (HST) were obtained. During these observations the Cassini spacecraft provided a high-latitude view of Saturn's auroras. Intense auroras were observed by the Ultraviolet Imaging Spectrograph (UVIS) from close range (about 5 Saturn radii away). A 6-frame UVIS movie has been constructed from some of the observations from May 20- 21, 2013 showing the evolution of two bright auroral features. We report on the UVIS images, the corresponding spectra, and compare the UVIS data to HST images and data from other Cassini instruments. [less ▲]

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See detailIntroduction et conclusion
Dozo, Björn-Olav ULg; Preyat, Fabrice; Tilleuil, Jean-Louis

Conference (2013, October)

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See detailSuivis hydromorphologiques et écologiques dans le cadre du projet Walphy
Verniers, Gisèle; Peeters, Alexandre ULg; De le Court, Bernard

Conference (2013, October)

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See detailDioxins in our food: Where are we 14 years after the Belgian chicken-gate?
Focant, Jean-François ULg

Conference (2013, October)

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See detailThe extinction of ichthyosaurs is a facet of a major Cenomanian turnover in marine ecosystems
Fischer, Valentin ULg

Conference (2013, October)

Untangling geosphere-biosphere interactions is crucial to understand the biodiversity and how it might evolve in a changing environment. But little is known about the possible impact of environmental ... [more ▼]

Untangling geosphere-biosphere interactions is crucial to understand the biodiversity and how it might evolve in a changing environment. But little is known about the possible impact of environmental changes on animals occupying the highest levels of the marine trophic chains. The Cretaceous period offers a fantastic opportunity to investigate such relationship, being characterized by a globally warm but changing climate and a diverse assemblage of aquatic reptiles that underwent profound modifications during this period, ultimately permitting the diversification of the animals dominating nowadays marine ecosystems. The origin, magnitude and nature of these turnovers are poorly understood and have rarely been investigated in a global canvas. Especially, how and why ichthyosaurs, the ‘fish-shaped’ marine reptiles, went extinct at the beginning of the Late Cretaceous has been a mystery for decades. Previous assessments of their diversity suggested ichthyosaurs were already on the decline since the end of the Jurassic; their final extinction was therefore regarded as anecdotal. Several theories have proposed unique biological drivers to this event, including a break in the food chain or competition with other marine vertebrates. The reassessment of the taxonomy, phylogeny and paleoecology Cretaceous ichthyosaurs from Eurasia tells a much different story. Ichthyosaurs were ecologically and taxonomically diverse in several Eurasian ecosystems up to the latest Early Cretaceous. This revision also reveals that their extinction is diachronic, being staggered over four phases that span the entire Cenomanian stage. Detailed comparison with other groups suggests the multiphased extinction of ichthyosaurs is not an isolated event, as was previously assumed, but correlates with profound, multiphased turnovers among other marine animals, such as microplankton, rudists, ammonoids, and pythonomorphs. The diversity and contemporaneity of the biotic responses suggest worldwide physicochemical drivers for this profound reorganization of the marine ecosystems. The extinction of ichthyosaurs therefore appears as one of the facets of a much wider event that affected most of the marine ecosystems during the Cenomanian. [less ▲]

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See detailTicks of the trade: technical analysis self-justified
Claisse, Frédéric ULg

Conference (2013, October)

As opposed to fundamental analysis, financial chartism (or technical analysis) is based on the assumption that future movements of a traded asset can be inferred from past regularities. In spite, or maybe ... [more ▼]

As opposed to fundamental analysis, financial chartism (or technical analysis) is based on the assumption that future movements of a traded asset can be inferred from past regularities. In spite, or maybe by virtue of its lack of scientific grounds, it enjoys an ever-growing popularity among amateur traders, as countless websites provide free, simple and powerful tools for making professional-looking charts and even automate the detection of trends. Though technical analysts account for the validity of chart patterns in terms of market psychology, constructivist explanations also abound among trading communities: it is all as if economic agents reflexively used technical analysis as a means of coordination on the market. Markers like moving averages and trend lines serve as self-referent indicators whose efficacy only gets reinforced as more agents use it as pivotal points. Performativity is the technical analyst’s most natural language: explicit mentions to mechanisms such as the self-fulfilling prophecy or the Keynesian beauty contest are the only justifications s/he needs. Some chartists even claim their discipline does not contradict the efficient-market hypothesis: if prices already reflect all past publicly available information, one may skip the hassle of dissecting balance sheets or mastering pricing models, focusing instead on candlestick or diagram patterns which, by conjecture, contain all the necessary information to explain price movements. Drawing on the comparative analysis of nonprofessional trading blogs, our paper examines how these major epistemic modes of justification of technical analysis have come to support each other, in a context of proliferation of charting tools. [less ▲]

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See detailDe l'importance des représentations pour résoudre des problèmes « non routiniers ».
Vlassis, Joëlle; Gamo, Sylvie; Fagnant, Annick ULg

Conference (2013, October)

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See detailSeals as sentinel species for the marine environment
Das, Krishna ULg

Conference (2013, October)

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See detailModeling post-combustion CO2 capture with assessment of solvent degradation
Léonard, Grégoire ULg; Belletante, Ségolène; Cabeza Mogador, Bruno et al

Conference (2013, October)

Post-combustion CO2 capture in power plants is one of the most mature technologies for a short-term and large-scale decrease of CO2 emissions while simultaneously addressing the growing global energy ... [more ▼]

Post-combustion CO2 capture in power plants is one of the most mature technologies for a short-term and large-scale decrease of CO2 emissions while simultaneously addressing the growing global energy demand. CO2 is chemically absorbed in an amine solvent that can be regenerated at higher temperature, producing a pure CO2 stream. However, the large impact of this technology on the power plant efficiency and the environmental penalty are the main drawbacks for large-scale implementation. In this work, an innovative approach combining process modeling and evaluation of the environmental penalty due to amine degradation is presented. Based on experimental results, the kinetics of solvent oxidative and thermal degradation is estimated and included in the process model developed in Aspen Plus. Using this model, the influence of operating parameters like the oxygen concentration in the flue gas or the solvent regeneration pressure is studied. This model is a first step for a multi-objective optimization of the CO2 capture process, assessing both energy and environmental penalties of this technology. [less ▲]

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See detailLes travaux de reméandration de l'Eau Blanche dans le cadre du projet Walphy: comparatif des techniques, coûts et efficacité
De le Court, Bernard; Verniers, Gisèle; Peeters, Alexandre ULg

Conference (2013, October)

L’Eau Blanche est un petit cours d’eau de plaine s’écoulant dans une région agricole. Il a subi dans les années 60 des travaux importants de rectification qui ont fortement banalisé ses habitats ... [more ▼]

L’Eau Blanche est un petit cours d’eau de plaine s’écoulant dans une région agricole. Il a subi dans les années 60 des travaux importants de rectification qui ont fortement banalisé ses habitats aquatiques et rivulaires et bloqué sa dynamique fluviale. Dans le cadre du projet Walphy, des travaux de restauration du cours d’eau ont été réalisés de 2010 à 2011 sur 3 sites, présentant des contraintes différentes en fonction desquelles on a du faire varier l’ambition de la restauration. Dans le village de Mariembourg, les aménagements se limitent à améliorer le lit mineur par des structures diversifiant les écoulements et la création de petits habitats piscicoles. A Nismes, une emprise modeste dans le lit majeur permet la recréation d’une sinuosité par déblai et remblai. A Boussu, un ancien méandre s’étalant largement dans le lit majeur a pu être récupéré. Les trois chantiers sont comparés dans leur conception, leur mise en œuvre et leur coût. Deux ans après les travaux, une évaluation de l’efficacité des réalisations est proposée sur base d’une cartographie des micro-habitats et le calcul d’indices hydromorphologiques. Par ailleurs, la dynamique du cours d’eau a fait l’objet d’un suivi basé sur l’analyse de levés topographiques. Cette analyse est complétée par les premiers résultats de suivis biologiques (macrophytes, macro-invertébrés et poissons). [less ▲]

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See detailMinimishing the nutritional deficit in ill preterm infants
SENTERRE, Thibault ULg

Conference (2013, October)

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See detailNursing adherence on ventilator care bundle in a burn unit.
DEPAYE, Nicolas ULg; ROUSSEAU, Anne-Françoise ULg; LAPORT, Virginie ULg et al

Conference (2013, September 30)

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See detailLa météorologie et la climatologie dans la politique scientifique belge
Pirot, Pascal ULg

Conference (2013, September 28)

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See detailPères gays en transition: croyances, relations et pistes thérapeutiques
D'Amore, Salvatore ULg

Conference (2013, September 28)

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See detailWP8 and WP9 developments: Data-Interpolating Variational Analysis (Diva) developments
Troupin, Charles ULg; Barth, Alexander ULg; Ouberdous, Mohamed et al

Conference (2013, September 27)

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See detailFluidothérapie chez le veau
Sartelet, Arnaud ULg; Lecomte, Denis; Theron, Léonard ULg et al

Conference (2013, September 27)

Detailed reference viewed: 47 (9 ULg)
See detailPsychological factors affecting childsness
Naziri, Despina ULg

Conference (2013, September 27)

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See detailLondon or New York? Mobility Options of Young Belgians in Times of Crises
Lafleur, Jean-Michel ULg

Conference (2013, September 26)

Since the beginning of the financial and economic crisis, Belgium has experienced a new influx of Southern European immigration while continuing to receive large numbers EU citizens proceeding from ... [more ▼]

Since the beginning of the financial and economic crisis, Belgium has experienced a new influx of Southern European immigration while continuing to receive large numbers EU citizens proceeding from Central and Eastern European Member States. This reality is however hiding the fact that, simultaneously, a large number of Belgian citizens continue to leave the country every year. Belgian emigration has indeed tripled between 1970 and 2011 and nowadays about 35.000 citizens leave the country every year. Despite the increase in the number of Belgian pensioners retiring abroad, the modal age of departure remains low (26 years old). In this paper, I propose to examine two related questions on the emigration of young Belgians. First, what are the motivations of young Belgians to leave their home country today even though Belgium seems to be resisting better than most Member States to the economic crisis? Second, what drives Belgian emigrants to specific cities abroad? [less ▲]

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See detailQuelle est l’influence de la culture de la génération C sur le rapport au travail et au management ?
Cusumano, Christophe ULg

Conference (2013, September 25)

Generation C, also known as generation Z, is a term used to designate people born between 1987 and 1994. This study aims to answer the following question: Is it generation C merely a subgroup of ... [more ▼]

Generation C, also known as generation Z, is a term used to designate people born between 1987 and 1994. This study aims to answer the following question: Is it generation C merely a subgroup of generation Y, or is it a separate group? The perspective of this study is focusing on the codes, the moral values, the attitudes, and the representation towards work and management of generation C. After a brief review of the concept of generation and an overview of the scientific literature on the topic of the baby boom generation, generation X, Y, and C, the results of the empiric study will be presented. This study is based on one hand on interviews and focus groups, which allowed us to question 100 people, as well as, on the other hand on a survey answered by 400 individuals. The conclusion is that there is a moderate influence of generations on the relationship of work and management. Generation C is characterized by a heightening of the traits of generation Y. It does distinguish itself on a qualitative manner on several aspects, such as its relationship towards technology, on the management follow up, and on the perception if the company's boundaries. [less ▲]

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See detailLa communication sur les plantes invasives: bilan et perspectives
Halford, Mathieu ULg

Conference (2013, September 25)

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See detailCharacterization of tumor heterogeneity using bioimage informatics and 3D computational modeling
Stamatelos, Spyros; Carlier, Aurélie ULg; Kim, Eugene et al

Conference (2013, September 25)

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See detailConception et utilisation de « seepage-meters » artisanaux pour l'étude des interactions «rivière – eaux souterraines » au Burkina Faso
Sauret, Elie ULg; Nitcheu, Martial; Orban, Philippe ULg et al

Conference (2013, September 25)

Situé à l'ouest du Burkina Faso dans la région de Bobo Dioulasso, le bassin du Kou présente un contexte climatique et hydro(géo)logique, favorables à l'accumulation et à la mobilisation d’importantes ... [more ▼]

Situé à l'ouest du Burkina Faso dans la région de Bobo Dioulasso, le bassin du Kou présente un contexte climatique et hydro(géo)logique, favorables à l'accumulation et à la mobilisation d’importantes ressources en eaux souterraines et de surface, en témoigne, les sources de Nasso/guinguette au centre de bassin qui ont un débit d'environ 6000 m3/h. D'un point de vue hydrogéologique, les sources qui constituent les points d’émergences des formations aquifères profonds du bassin se déchargent dans la rivière (Kou) et assurent ainsi sa pérennité tout au long de l’année. D’amont en aval du bassin, le Kou est largement exploité par les agriculteurs installés ça et là de part et d’autre de ses rives. Malheureusement, au cours des vingt dernières années un afflux important de nouveaux agriculteurs a constitué une pression sur les ressources en terres et en eau du bassin, occasionnant une concurrence aigue à tendance conflictuelle entre les différents exploitants agricoles autour de la rivière. Pour mieux caractériser et, quantifier l'évolution dans le temps des ressources en eau du Kou , une série de tests et études hydrogéologiques prenant en compte les deux autres réservoirs : les aquifères sédimentaires profonds et la plaine alluviale déployé tout au long de la rivière, ont été réalisées. Les techniques de mesure directe par seepage meters des volumes d’eau échangés à l’interface «rivière - nappe» ont permis de quantifier localement les transferts d’eau et déceler les directions et sens des échanges entre les différents réservoirs. Les résultats obtenus ont montré qu’il existe des sections où le Kou gagne (1.5 m3/s) ou perd (-0.10 m3/s) de l’eau au profit ou au détriment des eaux souterraines (aquifères sédimentaires profonds et plaine alluviale). Ces résultats ont été validés par des analyses hydrochimiques des échantillons d’eau prélevés. [less ▲]

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See detailDosage des catécholamines et métabolites par LCMS-MS
LE GOFF, Caroline ULg

Conference (2013, September 25)

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See detailAfter-Care : from Johannesburg 1930 to the Sixties in Western Coalfield Societies
Geerkens, Eric ULg

Conference (2013, September 25)

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See detailMise en oeuvre du formalisme multifractal sur les espaces Snu
Kleyntssens, Thomas ULg; Nicolay, Samuel ULg

Conference (2013, September 24)

When considering very irregular functions, it does not make sense to try to characterize the pointwise irregularity because it can change from one point to another. It is more interesting to compute the ... [more ▼]

When considering very irregular functions, it does not make sense to try to characterize the pointwise irregularity because it can change from one point to another. It is more interesting to compute the spectrum of singularities, ie "the size'' of the set of points which share the same pointwise irregularity; by size, one means the Hausdorff dimension. To compute the spectrum of singularities in practice, we use a multifractal formalism. In 1885, Frisch and Parisi have proposed a first formalism. Its main default is that it always leads to a concave spectrum. In 2004, Stéphane Jaffard has introduced the Snu spaces. They lead to a new multifractal formalism which can detect non concave spectra. In practice, one has to avoid the concept of limit and to deal with finite size effects (for example, one can only calculate a finite number of wavelet coefficients). I present a method to determine the spectrum based on the Snu spaces and I illustrate it numerically on theoretical functions. [less ▲]

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See detailAPI design for machine learning software: experiences from the scikit-learn project
Buitinck, Lars; Louppe, Gilles ULg; Blondel, Mathieu et al

Conference (2013, September 23)

scikit-learn is an increasingly popular machine learning library. Written in Python, it is designed to be simple and efficient, accessible to non-experts, and reusable in various contexts. In this paper ... [more ▼]

scikit-learn is an increasingly popular machine learning library. Written in Python, it is designed to be simple and efficient, accessible to non-experts, and reusable in various contexts. In this paper, we present and discuss our design choices for the application programming interface (API) of the project. In particular, we describe the simple and elegant interface shared by all learning and processing units in the library and then discuss its advantages in terms of composition and reusability. The paper also comments on implementation details specific to the Python ecosystem and analyzes obstacles faced by users and developers of the library. [less ▲]

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See detailEinleitung
Brüll, Christoph ULg; Rohrkamp, René

Conference (2013, September 21)

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See detailSerial order working memory is impaired in developmental dyscalculia
Attout, Lucie ULg

Conference (2013, September 21)

Several studies explored associations between impairments in verbal working memory (WM) and numerical cognition, but with inconclusive findings. The present study explored verbal WM impairment in children ... [more ▼]

Several studies explored associations between impairments in verbal working memory (WM) and numerical cognition, but with inconclusive findings. The present study explored verbal WM impairment in children with developmental dyscalculia, by adopting the critical distinction between WM for item information (the items to be retained) and WM for order information (the order of the items within a list). We hypothesized that especially WM for order should be related to impaired numerical abilities, given that recent studies suggest close interactions between the representation of order information in WM and ordinal numerical processing. We investigated item and order WM capacities as well as basic numerical processing abilities in 16 children with dyscalculia (age: 8-11 years) and 16 typically developing children matched on age, IQ and reading abilities. WM for order information was assessed via a serial order reconstruction task which maximized serial order storage requirements. WM for item information was assessed using a single monosyllabic nonword delayed repetition maximizing phonological item processing. We observed that the group with dyscalculia performed significantly slower than the control group in symbolic order and magnitude judgment task, while not being slowed on general measures of processing speed. Dyscalculic participants also performed significantly poorer and with less precision than controls in the order WM task, but not in the item WM task. These results highlight a specific impairment for WM for serial order in dyscalculia, and could reflect a more general serial order processing impairment for both WM and numerical domains. [less ▲]

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See detailIntroduction
Bilhaut, Anne-Gaël ULg

Conference (2013, September 20)

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See detailHow to perform the most minimal invasive cholecystectomy?
DETRY, Olivier ULg

Conference (2013, September 20)

Twenty years ago, laparoscopy has totally transformed the surgical approach of the gallbladder. For those who were not in surgery at that time, it has to be reminded that most open cholecystectomies ... [more ▼]

Twenty years ago, laparoscopy has totally transformed the surgical approach of the gallbladder. For those who were not in surgery at that time, it has to be reminded that most open cholecystectomies performed in the 80’s required nasogastric tube for several days, surgical drain, and 5 to 8 days of hospitalisation. For these obvious advantages, laparoscopic cholecystectomy has become the “Gold Standard” without evidence by a randomised controlled study comparing open and laparoscopic techniques. These last years, some groups proposed variations of laparoscopic cholecystectomies that they presented as less invasive. In robotic surgery, the Da-Vinci device has been proposed without significant improvement since more than 10 years. To date, no interest of this Da-Vinci robot has been demonstrated in abdominal surgery. Its cost for acquisition, its yearly fee and the cost for each use render its use without proof of results totally inappropriate. Single-Incision Laparoscopic Surgery (SILS) has also been described to perform cholecystectomy with only one larger umbilical incision. Until now, no superiority of SILS on classical cholecystectomy has been demonstrated. The Natural Orifice Transluminal Endoscopic Surgery (NOTES) proposes to use the vagina, the stomach or the colon to remove the gallbladder. No prospective controlled comparison has proved the superiority of these approaches that sometimes do not reach common sense or usual surgical principles. What is a minimal invasive cholecystectomy? A safe and un expensive cholecystectomy, with a good anatomical exposure, a cholangiography, and a good surgical comfort allowing to perform several procedures in the same day; a cholecystectomy that can be performed as a day-case without complications; a cholecystectomy that can be performed laparoscopically in acute settings; a cholecystectomy without the risk of postoperative incisional hernia. In necessary, in young and thin woman, laparoscopic cholecystectomy may be performed using 2 mm trocars that allow a good triangulation but with minimal scars. [less ▲]

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See detailLa querelle autour d'une fondation psychologique des sciences historiques
Dewalque, Arnaud ULg

Conference (2013, September 20)

La psychologie peut-elle être considérée comme le « fondement » (Grundlage) des sciences de l’esprit ? Si oui, à quelles conditions ? Cette question a profondément divisé le paysage philosophique au ... [more ▼]

La psychologie peut-elle être considérée comme le « fondement » (Grundlage) des sciences de l’esprit ? Si oui, à quelles conditions ? Cette question a profondément divisé le paysage philosophique au tournant du XXe siècle. D’un côté, certains auteurs, comme le brentanien Carl Stumpf (1848-1936), l’élève de Dilthey, Max Frischeisen-Köhler (1878-1923), ou celui de Benno Erdmann, Erich Becher (1882-1929), répondent par l’affirmative : oui, la psychologie est la discipline fondamentale des sciences de l’esprit, comme la physique ou la mathématique est la discipline fondamentale des sciences de la nature. D’autres auteurs, en revanche, contestent que la psychologie puisse fonder les sciences historiques et réclament un autre fondement, non psychologique. C’est le cas, exemplairement, des néokantiens de l’école de Bade, Wilhelm Windelband (1848-1915) et Heinrich Rickert (1863-1936). Dans cet exposé, je suggère que l’approche psychologique présente certains avantages. L’intuition fondamentale derrière l’idée d’une fondation psychologie de la connaissance, à mon sens, est une intuition "empiriste" : l’expérience vécue est l’origine ou la source des concepts qui nous servent à connaître le monde, c’est-à-dire à expliquer le monde naturel et à comprendre le monde historique. Connaître, c’est transférer ou appliquer des « concepts psychologiques primaires », tirés de l’expérience vécue, à des objets du monde. [less ▲]

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See detailSoluble biomarkers to evaluate chondroprotection: The Revolution is underway !
Henrotin, Yves ULg

Conference (2013, September 17)

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See detailAlgebrability of nowhere Gevrey differentiable functions
Esser, Céline ULg

Conference (2013, September 17)

Detailed reference viewed: 24 (3 ULg)
See detailPsychanalyse et homosexualité
Naziri, Despina ULg

Conference (2013, September 16)

Detailed reference viewed: 14 (1 ULg)
See detailThe intra-articular injection of alginate-chitosan beads in an hydrogel prevents the development of osteoarthritis in ACLT model
Oprenyeszk, Frédéric ULg; Chausson, M; Maquet, V et al

Conference (2013, September 16)

Purpose To evaluate the effects of a new biomaterial composed of alginate-chitosan (AC) beads dispersed in a viscous thermogelling chitosan-based (H) hydrogel on the development of osteoarthritis (OA) in ... [more ▼]

Purpose To evaluate the effects of a new biomaterial composed of alginate-chitosan (AC) beads dispersed in a viscous thermogelling chitosan-based (H) hydrogel on the development of osteoarthritis (OA) in rabbit. Materials & Methods OA was surgically induced by the transection of the anterior cruciate ligament (ACLT) in rabbits. One week after surgery, animals received a single intra-articular injection (900 µl) of AC beads in H hydrogel (group I), H hydrogel alone (group II) or saline (group III). OA development was followed by X-rays. Blood samples were collected throughout the study to measure biological markers (PGE2 and CRP). Macroscopic observation and histological evaluation of articular cartilage and synovial membrane were performed 6 weeks after surgery. Results The X-rays analysis showed a significant decrease (p <0.05) of the Kellgren and Lawrence score in group I (1.5 ± 0.2) compared with group II (2.2 ± 0.5) and group III (3.0 ± 0.4). The size and the severity of the macroscopic OA cartilage lesion tended to decrease in group I compared to the other groups. The histological global score that refers to all compartments of the knee joint was significantly decreased in group I (11.0 ± 0.7) compared to group II (14.4 ± 0.6, p <0.01) and group III (14.8 ± 0.6, p <0.001). The injection of AC beads in H hydrogel also tended to reduce the synovial membrane inflammation. No significant variation of PGE2 and CRP serum levels were observed in each after 6 weeks follow-up whatever the treatment injected. Conclusion This study showed that AC beads dispersed in H hydrogel prevented OA in ACL transection rabbit model. This effect was not observed with the hydrogel alone, suggesting that AC beads play a role in joint protection. The preventive effect was observed in all joint compartments indicating a global protective effect of this new implantable biomaterial. [less ▲]

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See detailSilver nanowire network : physical properties and effects of thermal treatments
Lagrange, Mélanie; Langley, Daniel ULg; Giusti, Gael et al

Conference (2013, September 16)

Detailed reference viewed: 26 (0 ULg)
See detailHealth related guidelines for wind farms in Belgiu m
van den Berg, Frits; Passchier, Wim; Botteldooren, Dick et al

Conference (2013, September 15)

In 2011 the Belgian authorities have asked the Supe rior Health Council (SHC) to advise on the health e ffects of wind farms. A working group of experts with diff erent backgrounds was put together to ... [more ▼]

In 2011 the Belgian authorities have asked the Supe rior Health Council (SHC) to advise on the health e ffects of wind farms. A working group of experts with diff erent backgrounds was put together to assess all th e available literature. This group considered the req uest in the context of sustainable development and drafted an advice that was reviewed by two international ex perts. It is expected that the advice will be publi shed in the spring of 2013. The advice mentions direct effects of operational w ind turbines that may have negative consequences fo r the health and well-being of neighbouring people. It st resses the importance of factors such as the change in landscape, the possible intrusion on people’s attac hment to their environment and the effect of local economic benefits and costs associated with a wind energy project. Also, the perception of the future quality of life will determine the social acceptance of a w ind project by a local community. The advice gives a number of recommendations to better deal with all t hese aspects. The paper will give an overview and explanation of these recommendations. [less ▲]

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See detailRegional urban groundwater body risk assessment of contaminants using remotely sensed multi-resolution land-cover data
Batelaan, Okke; Dujardin, Juliette; Jamin, Pierre ULg et al

Conference (2013, September 15)

Contaminated sites are often the result of past relatively anarchic economical and industrial development. The last decades stakeholders are more aware of the risks posed by these sites. Within the Frac ... [more ▼]

Contaminated sites are often the result of past relatively anarchic economical and industrial development. The last decades stakeholders are more aware of the risks posed by these sites. Within the Frac-Weco project an integrated framework for the assessment, at regional scale, of the risks posed by these contaminated sites on water resources and ecosystems has been developed. The methodology is based on the calculation of contaminant fluxes reaching the receptors providing a way of estimating the level of exposure/degradation of these receptors at the groundwater body scale. The most important contamination problems at regional scale are located around old urban and industrialized areas. The land-cover distribution in these zones is of prime importance because it determines the spatial variation of groundwater recharge, which is the main vector of contaminant leaching from soil surface to groundwater. To obtain detailed information about land cover for groundwater recharge modeling, a stratified satellite image classification approach was adopted combining land-cover mapping at pixel level for the studied area as a whole with sub-pixel estimation of imperviousness within built-up zones. The obtained land-cover data is used as an input in the WetSpass model to simulate groundwater recharge at high resolution in spatially complex urban areas. In the next step the simulated groundwater recharge is used as an input in a regional scale groundwater flow and transport model simulating contaminant dispersion through the aquifer. Modeling results are further used to calculate a quality index for the whole groundwater body based on threshold values defined specifically for each contaminant. The approach proposed has been applied on the RWM073 groundwater body corresponding to the alluvial deposits of the Meuse River, Liège (Belgium). The high-resolution groundwater recharge estimations obtained by integrating remote sensing in the modeling procedure allow a better identification of the potential sources of contaminants and enable a proper quantification of total fluxes of contaminants from brownfields into the groundwater. The developed framework for regional risk assessment results in a global quality indicator for the groundwater body which can be used as input for decision-making. [less ▲]

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See detailHistoire culturelle du goût. Vers l'invention d'une gastronomie française
Von Hoffmann, Viktoria ULg

Conference (2013, September 14)

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See detailCongenital pseudarthrosis of the tibia: a mathematical approach
Van Schepdael, An; Carlier, Aurélie ULg; Ashbourn, Joanna et al

Conference (2013, September 13)

Detailed reference viewed: 15 (0 ULg)
See detailWhere are the politics in responsible innovation? European governance, technology assessments, and beyond
Van Oudheusden, Michiel ULg; Charlier, Nathan ULg

Conference (2013, September 13)

Responsible innovation (RI) is founded on the idea that the introduction and adoption of technology in society fails when technologies do not reflect societal needs and values. Hence, proponents of RI ... [more ▼]

Responsible innovation (RI) is founded on the idea that the introduction and adoption of technology in society fails when technologies do not reflect societal needs and values. Hence, proponents of RI solicit society’s opinions in an attempt to render technology developments and policies more socially responsive. Solicitation typically takes the form of broad consultations involving as many relevant stakeholders as possible, in ways that enhance inclusiveness, transparency, and deliberation. This paper asks how the RI concept is taken up and elaborated, based on accounts developed on the EU policy level and on a local, Flemish, technology assessment level. It finds that, notwithstanding important differences between these two deliberative frameworks, neither one leaves much room for politics, understood as the constitution and contestation of power. Rather, these frameworks largely ignore questions about the politics in deliberation (e.g. how actors craft RI through strategic use of argument and other advantage-seeking techniques), as well as the politics of deliberation (i.e. how RI privileges a process definition of democracy at the cost of participatory and representative perspectives). In addition, these frameworks forsake questions about the authoritative allocation of values (as in formalized, representative politics) and the institutional uptake of deliberative engagements more broadly. The paper’s aim is to provide a constructive criticism of the RI paradigm by rendering the above political issues explicit and proposing ways of taking them into account. [less ▲]

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See detailAditi et les naissances héroïques
Swennen, Philippe ULg

Conference (2013, September 13)

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See detailCrop association to improve biological control: case study on pea and wheat aphids
Chevalier Mendes Lopes, Thomas ULg; Bodson, Bernard ULg; Francis, Frédéric ULg

Conference (2013, September 13)

Nowadays, strategies used to control aphids in fields of pea, Pisum sativum L., and wheat, Triticum aestivum L., still rely on synthetic insecticides which have negative effects on the environment and ... [more ▼]

Nowadays, strategies used to control aphids in fields of pea, Pisum sativum L., and wheat, Triticum aestivum L., still rely on synthetic insecticides which have negative effects on the environment and human health. This research focused on the development of sustainable alternative methods, with special emphasis on cultural practices and plant management systems. Increasing the diversity within crops may have several beneficial effects on pest control, creating attractive habitats for indigenous beneficial fauna and simultaneously deterring pests – the ‘push-pull’approach. In this field study, two wheat/pea associations (mixed cropping and strip cropping) where compared to monocultures of pea and wheat. The abundance and diversity of adult aphidophagous insects (predators and parasitoids) were accessed weekly using yellow traps, while aphids were observed directly on plants. In both crops, the percentage of plants infested with aphids and density of aphid colonies were significantly higher in monocultures during periods of aphid abundance. Mixed cropping was particularly beneficial for the pea, whereas strip-cropping was more efficient for the wheat. The abundance of beneficials was significantly higher in monocultures comparing to the other treatments. Quantitative aphid-natural enemy food webs showed that the abundance of the two main ladybird species, Coccinella septempunctata L. and Propylea quatuordecimpunctata (L.), increased with the occurrence of Acyrthosiphon pisum (Harris) on pea plants. Abundance of the two main species of Syrphidae, Sphaerophoria scripta (L.) and Eupeodes corollae (F.), increased with the occurrence of Sitobion avenae (F.) and Metopolophium dirhodum (Walker) on wheat plants. This study shows that increasing diversity within crops can help lower aphid infestations. However, additional methods are needed to more efficiently attract aphidophagous beneficials and promote the natural control of aphids. [less ▲]

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See detailAdult bone marrow stem cells in neurological diseases: Protect or repair?
Neirinckx, Virginie ULg

Conference (2013, September 12)

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See detailCorporate social solidarity: a conceptual and empirical exploration
Crutzen, Nathalie ULg; Louche, Céline; Van Liedekerke, Luc

Conference (2013, September 12)

Detailed reference viewed: 25 (3 ULg)
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See detailAN IMMUNOLOGICAL METHOD TO COMBINE THE MEASUREMENT OF ACTIVE AND TOTAL HUMAN MYELOPEROXIDASE ON THE SAME SAMPLE FROM A COMPLEX MEDIUM
Franck, Thierry ULg; MINGUET, Grégory ULg; Mossay, Pierre et al

Conference (2013, September 12)

Active neutrophil myeloperoxidase (MPO) is a powerful producer of oxidant molecules in acute or chronic inflammation, and it is essential to measure its activity in biological samples. We combined two ... [more ▼]

Active neutrophil myeloperoxidase (MPO) is a powerful producer of oxidant molecules in acute or chronic inflammation, and it is essential to measure its activity in biological samples. We combined two immunological techniques, the SIEFED (specific immunologic extraction followed by enzymatic detection) and an ELISA, to measure the active and total contents of human MPO on the same sample and with the same calibration curve, to define an accurate ratio between the active and total enzyme. After the extraction of MPO from aqueous or biological samples by immobilized anti-MPO antibodies followed by a washing to eliminate unbound material, the active and the total contents of the enzyme were sequentially measured without interferences (patent: EP2017351-B1, 2010). Compared to a classical sandwich ELISA, there is one additional step corresponding to the in situ measurement of MPO activity, but this step does not affect the following measurement of the total MPO content. After validation, the combined technique was applied to a whole blood model of in vitro stimulation with phorbol-myristate-acetate (PMA), cytochalasin B/N-formyl-methionyl-leucyl-phenyl-alanine (CB/fMLP) or lipopolysaccharide/ tumor necrosis factor-alpha (LPS/TNF-α) (n=9). The active/total MPO ratio in whole blood reached 0.267±0.126 for non-stimulated condition and was significantly (p<0.05) higher for PMA (0.360±0.106), CB/fMLP (0.380±0.113) and LPS/TNF-α (0.432±0.124) stimulated conditions. These different ratios highlight the real oxidant potential of MPO, which depends on the stimulating conditions, witness of what could happen in pathological situations with diagnostic purpose. The combined SIEFED/ELISA method also appeared as a powerful tool to screen potential inhibitors that could interact directly with the enzyme, either on its active site or on another key position. [less ▲]

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See detailStudy of the virulence of serotypes 4 and 9 of the Orbivirus African horse sickness virus in two mouse models
De la Grandière de Noronha Cotta, Maria Ana ULg; Zonta, William ULg; Mauroy, Axel ULg et al

Conference (2013, September 12)

African horse sickness (AHSV) is an infectious disease caused by a double stranded positive RNA virus which belongs to the family Reoviridae, genus Orbivirus. The virus has nine serotypes and is ... [more ▼]

African horse sickness (AHSV) is an infectious disease caused by a double stranded positive RNA virus which belongs to the family Reoviridae, genus Orbivirus. The virus has nine serotypes and is transmitted by a culicoides biting midge, principally Culicoides imicola. The establishment of an experimental model is needed for the investigation of the pathogenesis of this infection. Two mouse models, interferon-α receptor knock-out mice (A129 KO or IFNAR -/-) and immunocompetent mice (A129 WT), were tested. The viruses used for mice inoculations belonged to the two serotypes which caused epidemics in Europe, serotypes 4 and 9. The virus was inoculated by subcutaneous (SC) route and/or by intra-nasal (IN) route. Whole blood samples were taken from each mouse at regular intervals. The organs (liver, spleen, kidney, lung and brain) were taken at the end of the experiment or when the most affected mice were euthanized. All these samples were tested by a qRT-PCR targeting AHSV genome segment 7. Both serotypes of AHSV were detected by qRT-PCR until three weeks post-infection in blood of IFNAR -/- mice and A129 WT mice infected by SC route. Serotype 4 shows a higher peak of viremia than serotype 9. The peak of viremia was measured between day 2 and day 4 post-infection. These results demonstrate the potential of the immunodeficient mouse model for both clinical and biological features. The setting up of this mouse model has developed a tool for efficient in vivo study of AHSV. Research supported by the Belgium Federal Public Service, Health, Food Chain Safety and Environment. [less ▲]

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