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See detailStone tool use and hominin evolution
Fullagar, Richard; Rots, Veerle ULg

Conference (2015, May)

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See detailExpression of sexual ornaments in a polymorphic species: phenotypic variation in response to environmental risk
Winandy, Laurane ULg; Denoël, Mathieu ULg

in Journal of Evolutionary Biology (2015), 28(5), 1049-1056

Secondary sexual traits may evolve under the antagonistic context of sexual and natural selection. In some polymorphic species, these traits are only expressed during the breeding period and are ... [more ▼]

Secondary sexual traits may evolve under the antagonistic context of sexual and natural selection. In some polymorphic species, these traits are only expressed during the breeding period and are differently expressed in alternative phenotypes. However, it is unknown whether such phenotypes exhibit phenotypic plasticity of seasonal ornamentations in response to environmental pressures such as in the presence of fish (predation risk). This is an important question to understand the evolution of polyphenisms. We used facultative paedomorphosis in newts as a model system because it involves the coexistence of paedomorphs that retain gills in the adult stage with metamorphs that have undergone metamorphosis, but also because newts exhibit seasonal sexual traits. Our aim was therefore to determine the influence of fish on the development of seasonal ornamentation in the two phenotypes of the palmate newt (Lissotriton helveticus). During the entire newt breeding period, we assessed the importance of phenotype and fish presence with an information-theoretic approach. Our results showed that paedomorphs presented much less developed ornamentation than metamorphs and those ornamentations varied over time. Fish inhibited the development of sexual traits but differently between phenotypes: in contrast to metamorphs, paedomorphs lack the phenotypic plasticity of sexual traits to environmental risk. This study points out that internal and external parameters act in complex ways in the expression of seasonal sexual ornamentations and that similar environmental pressure can induce a contrasted evolution in alternative phenotypes. [less ▲]

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See detailSearching for early traces of fire production on flint tools
Sorensen, Andrew; Rots, Veerle ULg

Conference (2015, May)

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See detailThe stadium of Olympia: a dialogical composition
Kiuri, Miranda; Teller, Jacques ULg

in Montanola, J (Ed.) International Journal Arquitectonics: Architecture, phenomenology & social dialogics (2015)

The article proposes a renewed interpretation of the relation of the antique stadium of Olympia with its built environment. It is argued that the stadium, far from being isolated from the city as commonly ... [more ▼]

The article proposes a renewed interpretation of the relation of the antique stadium of Olympia with its built environment. It is argued that the stadium, far from being isolated from the city as commonly considered, was connected to the Altis through a series of visual relations, adopting principles of dialogical architecture: composition, significant location, functional routes, perceptions, role of architectonic elements and spatial characteristics. This argument is illustrated through computer-generated perspectives of the stadium. [less ▲]

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See detailBeam to concrete-filled rectangular hollow section column joints using long bolts
Hoang, Van Long ULg; Demonceau, Jean-François ULg; Jaspart, Jean-Pierre ULg

in Proceedings of the 15th international symposium on tubular structures - ISTS15 (2015, May)

This paper presents a research on a specific type of unstiffened extended end-plate joint used to connect I-shaped beams to concrete-filled rectangular hollow section columns. The main idea is to use long ... [more ▼]

This paper presents a research on a specific type of unstiffened extended end-plate joint used to connect I-shaped beams to concrete-filled rectangular hollow section columns. The main idea is to use long bolts throughout the column to connect the beam end-plates, so avoiding intermediate connecting elements (e.g. a reverse U channel) or special bolts (e.g. blind bolts). However, the use of long bolts for beam-to-column connections is still rare in the construction and no design procedure exists in the Eurocodes; this justifies the pre-sent research. Firstly, a test program within a RFCS European project titled HSS-SERF “High Strength Steel in Seismic Resistant Building Frames”, 2009-2013 was performed. In this project, specimens subjected to sig-nificant bending moments (and shear) or to shear only was defined. Then, analytical developments based on the component approach and aimed at predicting the joint response have been carried out; their validity is demonstrated through comparisons with the tests. Finally, design guidelines have been provided. [less ▲]

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See detailAdolescent delinquent behaviours as attempts of group social integration and well-being through social acceptance?
Born, Michel ULg; Cattelino, Elena; Gavray, Claire ULg et al

in Carneiro, Roberto; Carneiro, Maria Ana (Eds.) Youth, Offense and Well-Being . Can Science Enlighten Policy? (2015)

Large surveys in Western countries give pictures of adolescent well-being related to delinquency and group affiliation. The belonging to a particular country, city or neighbourhood with their social ... [more ▼]

Large surveys in Western countries give pictures of adolescent well-being related to delinquency and group affiliation. The belonging to a particular country, city or neighbourhood with their social structure influences the probability to have delinquent activities in group increasing or decreasing the risk of marginalisation, the sensibility to deviant values and the well-being related to peers’ acceptance. A general process would exist by which, firstly adolescents oppose themselves to the parents’ authority and seek for acceptance among their peers. This leads to a spiral when the youth tries to resolve his cognitive dissonance between the immoral acts he is invited to commit with his friends and his personal value system learned in his family, school and other institutions. In adolescence, the influence of peers can be positive or negative; it can be “protective peer-contagion” with positive response to normative talk or “deviant peer-contagion” with positive response to deviant talk or behaviour. At the micro level, well-adjusted peers are able to resist the influence of deviant peers. The participation to non-homogenous mixed groups seems to facilitate more normative talks. This leads to the hypothesis that the progressive extension to differentiated groups when adolescence is going through will strengthen their ties with conventional norms and contribute to their well-being. [less ▲]

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See detailHigh output [18F]FDOPA on AllInOne (Trasis) at commercial scale
Otabashi, Muhammad; Cascione, Christian; Lemaire, Christian ULg et al

in Journal of Labelled Compounds & Radiopharmaceuticals (2015, May), 58

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See detailSynedrella nodiflora (L.) Gaertn : a review on its phytochemical screening and uses in animal husbandry and medicine
Adjibode, A.G.; Tougan, U.P.; Youssao, A.K.I. et al

in International Journal of Advanced Scientific and Technical Research (2015), 3

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See detailLes attitudes communautaires et le vote
Deschouwer, Kris; De Winter, Lieven; Reuchamps, Min et al

in Deschouwer, Kris; Delwit, Pascal; Hooghe, Marc (Eds.) et al Décrypter l’électeur: Le comportement électoral et les motivations de vote (2015)

Les électeurs en Belgique se sentent-ils Belges, Flamands ou Wallons ? C’est la question principale posée dans le neuvième chapitre écrit par Kris Deschouwer, Lieven de Winter, Min Reuchamps, Dave ... [more ▼]

Les électeurs en Belgique se sentent-ils Belges, Flamands ou Wallons ? C’est la question principale posée dans le neuvième chapitre écrit par Kris Deschouwer, Lieven de Winter, Min Reuchamps, Dave Sinardet et Jérémy Dodeigne. Dans leur conclusion, ils constatent que les identités flamandes et wallonnes sont moins affirmées que l’identité belge, même dans le cas d’une forte polarisation politique autour de la réforme de l’État. En mai 2014, l’enjeu de la réforme de l’État a été – comme par le passé – peu déterminant dans le comportement de vote, même si cela varie d’un électorat de parti à un autre. En Wallonie, cela n’a pas été aussi déterminant, alors qu’en Flandre trois groupes d’électeurs peuvent être discernés. Dans le premier groupe, les partisans d’une plus grande réforme de l’État et d’une plus grande autonomie se retrouvent dans l’électorat de la N-VA et du Vlaams Belang. Dans un groupe plus modéré se retrouvent les électeurs du CD&V, alors que le troisième groupe (le moins favorable à plus de réformes et plus d’autonomie) est constitué des électeurs de l’Open VLD, du sp.a, de Groen et du PvdA. [less ▲]

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See detailBRAIN TRAINS: Intermodal rail freight transport and hinterland connections A SWOT analysis to assess the Belgian rail practice
Troch, Frank; Vanelslander, Thierry; Belboom, Sandra ULg et al

Scientific conference (2015, May)

This paper focuses on transversal research of the role and influences of rail freight transport, as a part of intermodal transport in Belgium. A SWOT analysis of the current situation is conducted ... [more ▼]

This paper focuses on transversal research of the role and influences of rail freight transport, as a part of intermodal transport in Belgium. A SWOT analysis of the current situation is conducted, starting from the actual weak usage of this mode of transport. Five different fields have been identified, impacting the economy and society. Each field indicates critical internal strengths and weaknesses for intermodal rail transportation in Belgium, and identifies possible future developments and setbacks. A Delphi-like approach is used, including a heterogeneous panel of experts, discussing and validating the SWOT results. To prioritize the characteristics, a survey on the different SWOT elements is performed, asking the experts to rate each statement on its influence and likelihood of happening, indicating the level of uncertainty. [less ▲]

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See detailDamage analysis of composite structures: simulation supported by testing
Bruyneel, Michaël ULg

Conference (2015, May)

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See detailRadar remote sensing observations to monitor landslides and prepare inventories for hazard assessment
Schlögel, Romy; Havenith, Hans-Balder ULg; Malet, Jean-Philippe et al

Scientific conference (2015, May)

Abstract: The creation of a landslide inventory encompassing multi-temporal information needs high quality and high-resolution data source as well as a good knowledge of the field. Visual image ... [more ▼]

Abstract: The creation of a landslide inventory encompassing multi-temporal information needs high quality and high-resolution data source as well as a good knowledge of the field. Visual image interpretation and field surveys are the prevailing methods for landslide inventory mapping while remote sensing techniques have become a widely used source of information for measuring the topography and deformation of the Earth surface (e.g. Berardino et al., 2002). Semi-automatic image analysis methods based on remote sensing techniques are proposed but their quality lacks behind the expert mappings (Guzzetti et al., 2012). Advance processing of SAR images have proven their ability for: (1) landslide detection and mapping (Farina et al., 2006; Cascini et al., 2009; Guzzetti et al., 2012), (2) process monitoring (Hilley et al., 2004; Zhao et al., 2012), (3) hazard assessment (e.g. Nikolaeva et al., 2014) and (4) risk management (Bardi et al., 2014). ... [less ▲]

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See detailCerebral FDG uptake changes with supraorbital transcutaneous electrical stimulation for episodic migraine prevention
D'Ostilio, Kevin ULg; Thibaut, Aurore ULg; Laureys, Steven ULg et al

Conference (2015, May)

Background: A recent multicentre RCT has shown that supraorbital transcutaneous stimulation (STS) targeting branches of the ophtalmic nerve with the Cefaly® device is effective as a preventive therapy for ... [more ▼]

Background: A recent multicentre RCT has shown that supraorbital transcutaneous stimulation (STS) targeting branches of the ophtalmic nerve with the Cefaly® device is effective as a preventive therapy for migraine (Schoenen et al., Neurology 2013). However, the mechanisms of action in the central nervous system remain unknown. Here, we conducted voxel-based analyses of [18]FDG-PET to evaluate metabolic changes immediately after the first STS session and after 3 months of treatment in patients with migraine. Methods: Twenty-eight subjects participated in the experiment: 14 patients with episodic migraine (ICHD3 beta criteria) and 14 age-matched controls. Healthy volunteers underwent only one [18]FDG-PET scan whereas patients were scanned at baseline, directly after a first session of STS and after 3 months of daily treatment. Results: Compliant patients showed a significant decrease in the number of attacks (p = 0.03). When compared to controls, patients (n = 14) at baseline were hypometabolic in the fronto-temporal regions (p < 0.001), especially in the orbitofrontal (OFC) and perigenual anterior cingulate cortex. OFC hypometabolism was not correlated with medication intake. In compliant patients, daily STS for 3 months was followed by a normalization of the fronto-temporal hypometabolism (p< 0.001; OFC: pFWE<0.01). Conclusion: Our study suggests that the OFC is hypoactive in episodic migraine. STS with the Cefaly° device is able to normalize this hypoactivity. This indicates that STS exerts its beneficial effect via slow neuromodulatory mechanisms, as also previously shown for percutaneous occipital nerve stimulation in refractory cluster headache (Magis et al., BMC Neurology 2011). [less ▲]

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See detailLife cycle assessment of biobased chemical building blocks made from European waste streams
Groslambert, Sylvie ULg; Léonard, Angélique ULg

Poster (2015, May)

Many drivers exist to persuade EU businesses to embrace the opportunities of the circular economy. However, the challenges faced by companies, particularly among SME’s, in the drive for resource ... [more ▼]

Many drivers exist to persuade EU businesses to embrace the opportunities of the circular economy. However, the challenges faced by companies, particularly among SME’s, in the drive for resource efficiency include access to funding, knowledge and capability, and ability to implement cost-effective technological solutions. It was these factors that inspired the creation of the ReNEW network. ReNEW, ‘Resource innovation Network for European Waste’, is a €5 million project funded by the Interreg IVB North West Europe scheme aiming to increase cooperation between research and business endeavours to create value from waste by optimising novel technologies for extracting materials from waste and their reuse in the supply chain. ReNEW also aims to inform local, national and European policy makers, and to share transnational best practice and improve specific support to meet the innovation needs of the waste sector. Within the frame of this project, several technologies are investigated by partners to improve the valorisation of organic wastes in chemicals such as the production of furfural (C5H4O2 - CAS 98-01-1) by the chemical hydrolysis of contaminated/hazardous woody biomass. [less ▲]

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See detailLIFE CYCLE ASSESSMENT OF ANTHROPIC WATER
Groslambert, Sylvie ULg; Léonard, Angélique ULg

Poster (2015, May)

In its Regional Policy Statement for 2009-2014, the Walloon Government (Belgium) undertakes to make Wallonia a model of good governance. Applying this principle in the field of the environment needs to be ... [more ▼]

In its Regional Policy Statement for 2009-2014, the Walloon Government (Belgium) undertakes to make Wallonia a model of good governance. Applying this principle in the field of the environment needs to be based on a continuous, objective and strict evaluation of the evolution of the state of environmental components (air, water, soil, biodiversity, etc.), the pressures to which they are subjected, the resultant impacts and the measures taken to improve living conditions within our Region. Within this framework, the General Operational Direction of Agriculture, Natural Resources and Environment (DGARNE) realises reports on the state of the environment in Wallonia, in close collaboration with universities and research centres. A chapter is dedicated to the efficient use of water resources, including a life cycle assessment of anthropic water and rain water harvesting. [less ▲]

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See detailMatière organique et dynamique du phosphore dans les systèmes sol-plante
Renneson, Malorie ULg

Conference (2015, May)

Depuis plusieurs années, la problématique du phosphore revient sur le devant de la scène, notamment à cause du rôle qu’il joue sur l’eutrophisation des eaux de surface. C’est aussi et surtout un élément ... [more ▼]

Depuis plusieurs années, la problématique du phosphore revient sur le devant de la scène, notamment à cause du rôle qu’il joue sur l’eutrophisation des eaux de surface. C’est aussi et surtout un élément essentiel pour les cultures dont les ressources minérales sont limitées. Les matières organiques sont donc une ressource en phosphore précieuse qu’il est primordial de valoriser au mieux. Cependant, toutes les matières organiques ne sont pas égales face aux engrais minéraux, que ce soit vis-à-vis de la réponse immédiate ou à plus long terme. Certaines matières organiques présentent des vitesses de libération du phosphore comparables à celles des engrais organiques. Cependant, les effets doivent également être examinés sur la durée afin d’envisager la possibilité d’une augmentation de la fertilisation phosphatée de nos sols à l’aide des matières organiques, dont les effluents d’origine non agricoles. Il est également important de comprendre les formes sous lesquelles le phosphore va se fixer dans le sol. Le phosphore organique peut présenter des teneurs fortement variables en fonction des types de sol et de l’occupation. Il s’agit d’un compartiment à ne pas négliger dans la caractérisation d’un sol. Différentes recherches et expérimentations ont été réalisées au sein du Service sur la caractérisation et la dynamique du phosphore dans les sols, notamment dans l’objectif de mieux gérer les apports organiques dans les sols. Les questions relatives au phosphore sont en effet importantes dans un objectif de gestion durable des matières organiques et des sols. [less ▲]

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See detailStock de matières organiques dans les sols agricoles wallons: état des lieux et tendances
Renneson, Malorie ULg

Conference (2015, May)

Créée en 1994, la base de données de REQUASUD constitue une source d’information importante de l’état des sols en région wallonne. A ce jour, elle est constituée de plus de 420 000 échantillons répartis ... [more ▼]

Créée en 1994, la base de données de REQUASUD constitue une source d’information importante de l’état des sols en région wallonne. A ce jour, elle est constituée de plus de 420 000 échantillons répartis sur l’ensemble du territoire wallon. Ils sont issus des analyses de terre réalisées à la demande des agriculteurs et des particuliers par les laboratoires wallons d’analyse de terre du réseau REQUASUD. Trois synthèses de l’état des sols en région wallonne ont été réalisées à ce jour (périodes 1994-1997, 1998-2002 et 2003-2008). Ces synthèses permettent en premier lieu de réaliser des cartes des teneurs en carbone organique total (COT) par région agricole et par principaux types de sol. Les cartes du statut organique tendent à mettre en évidence des différences importantes entre les régions agricoles. Une relation entre la distribution des taux de COT dans les sols cultivés et le relief est perceptible. Cela permet de confirmer l’existence d’un lien entre les taux de carbone et le climat. Il ne faut cependant pas non plus négliger l’aspect lié à l’intensification des productions agricoles. En outre, des évolutions temporelles peuvent être mises en évidence. La comparaison des moyennes entre 1994 et 2008 a permis de détecter une diminution du COT dans 3 régions agricoles : les régions jurassique (-15,3%), herbagère (-12,9%) et limoneuse (-6,5%). C’est dans cette dernière région que la situation est la plus préoccupante car le taux de COT y est très faible. Une attention toute particulière doit être portée à cette évolution car si la tendance à la baisse continue, cela pourrait devenir problématique. [less ▲]

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