References of "Unpublished conference/Abstract"      in Complete repository Arts & humanities   Archaeology   Art & art history   Classical & oriental studies   History   Languages & linguistics   Literature   Performing arts   Philosophy & ethics   Religion & theology   Multidisciplinary, general & others Business & economic sciences   Accounting & auditing   Production, distribution & supply chain management   Finance   General management & organizational theory   Human resources management   Management information systems   Marketing   Strategy & innovation   Quantitative methods in economics & management   General economics & history of economic thought   International economics   Macroeconomics & monetary economics   Microeconomics   Economic systems & public economics   Social economics   Special economic topics (health, labor, transportation…)   Multidisciplinary, general & others Engineering, computing & technology   Aerospace & aeronautics engineering   Architecture   Chemical engineering   Civil engineering   Computer science   Electrical & electronics engineering   Energy   Geological, petroleum & mining engineering   Materials science & engineering   Mechanical engineering   Multidisciplinary, general & others Human health sciences   Alternative medicine   Anesthesia & intensive care   Cardiovascular & respiratory systems   Dentistry & oral medicine   Dermatology   Endocrinology, metabolism & nutrition   Forensic medicine   Gastroenterology & hepatology   General & internal medicine   Geriatrics   Hematology   Immunology & infectious disease   Laboratory medicine & medical technology   Neurology   Oncology   Ophthalmology   Orthopedics, rehabilitation & sports medicine   Otolaryngology   Pediatrics   Pharmacy, pharmacology & toxicology   Psychiatry   Public health, health care sciences & services   Radiology, nuclear medicine & imaging   Reproductive medicine (gynecology, andrology, obstetrics)   Rheumatology   Surgery   Urology & nephrology   Multidisciplinary, general & others Law, criminology & political science   Civil law   Criminal law & procedure   Criminology   Economic & commercial law   European & international law   Judicial law   Metalaw, Roman law, history of law & comparative law   Political science, public administration & international relations   Public law   Social law   Tax law   Multidisciplinary, general & others Life sciences   Agriculture & agronomy   Anatomy (cytology, histology, embryology...) & physiology   Animal production & animal husbandry   Aquatic sciences & oceanology   Biochemistry, biophysics & molecular biology   Biotechnology   Entomology & pest control   Environmental sciences & ecology   Food science   Genetics & genetic processes   Microbiology   Phytobiology (plant sciences, forestry, mycology...)   Veterinary medicine & animal health   Zoology   Multidisciplinary, general & others Physical, chemical, mathematical & earth Sciences   Chemistry   Earth sciences & physical geography   Mathematics   Physics   Space science, astronomy & astrophysics   Multidisciplinary, general & others Social & behavioral sciences, psychology   Animal psychology, ethology & psychobiology   Anthropology   Communication & mass media   Education & instruction   Human geography & demography   Library & information sciences   Neurosciences & behavior   Regional & inter-regional studies   Social work & social policy   Sociology & social sciences   Social, industrial & organizational psychology   Theoretical & cognitive psychology   Treatment & clinical psychology   Multidisciplinary, general & others     Showing results 101 to 200 of 18080     1 2 3 4 5 6 7     Comparison of temperature from DTS and ERT with direct measurements during heat tracer experiments in heterogeneous aquifersNguyen, Frédéric ; Hermans, Thomas ; Jamin, Pierre et alConference (2016, September 27)Geothermal field characterization and heat tracer experiments often rely on scarce temperature data collected in boreholes. Electrical resistivity tomography (ERT) and distributed temperature sensing (DTS ... [more ▼]Geothermal field characterization and heat tracer experiments often rely on scarce temperature data collected in boreholes. Electrical resistivity tomography (ERT) and distributed temperature sensing (DTS) have the potential to provide spatial information on temperature changes in the subsurface. In this contribution, we show how DTS and ERT have been used to investigate the heterogeneity of a heterogeneous aquifer during a heat tracing experiment under forced gradient conditions. Optic fibers were installed in the heat injection well and in two piezometers intersecting the main flow directions at 8 m from the injection well. These piezometers were also equipped with ERT. The DTS measurement in the injection well clearly shows the two-layer nature of the aquifer. After the end of injection, the temperature in the bottom part of the well decreases faster than in the upper part due to the higher water fluxes. Those results are confirmed by DTS measurements in natural flow conditions during a heating wire test. DTS and ERT in the cross-panel both show the vertical and lateral heterogeneity of the aquifer. Temperatures only increase significantly in the bottom part of the aquifer where advection is predominant. However, strong differences are observed laterally. ERT additionally shows that the hot plume is divided in two main flow paths, which is confirmed by direct temperature measurements. The comparison of DTS and ERT shows that one of the well is suffering from water mixing. Indeed, temperature from DTS are homogeneous over the whole tichkness of the aquifer, whereas ERT temperature, less affected by local variations, are varying. Our study demonstrate the value of spatially distributed measurements for the monitoring of heat tracer experiment and highligths the issue of multilevel sampling. The detailed temperature measurements can be subsequently used in hydrogeological model to better estimates heat flow and transport parameters. [less ▲]Detailed reference viewed: 21 (5 ULg) Occurrence of greenhouse gases (CO2, N2O and CH4) in groundwater of the Walloon Region (Belgium)Jurado Elices, Anna ; Borges, Alberto ; Hakoun, Vivien et alConference (2016, September 27)Carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) can be indirectly transferred to the atmosphere through groundwater discharge into surface water bodies such as rivers. However, these emissions ... [more ▼]Carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) can be indirectly transferred to the atmosphere through groundwater discharge into surface water bodies such as rivers. However, these emissions are poorly evaluated and highly uncertain. The aim of this work is identify the hydrogeological contexts (alluvial, sandstone, chalk and limestone aquifers) and in situ conditions which are most conducive to the generation and occurrence of GHGs in groundwater at a regional scale. To this end, CO2, CH4 and N2O concentrations as well as major and minor elements were monitored (n=37 samples) in two field campaigns (09/2014 and 03/2015) in 15 groundwater bodies of the Walloon Region (Belgium). This preliminary work, which was presented in the 42st IAH conference (Rome, Italy), shown that GHG concentrations range from 5,160 to 47,544 ppm from the partial pressure of CO2 and from 0 to 1,064 nmol/L and 1 to 5,637 nmol/L for CH4 and N2O respectively. Overall, groundwater was supersaturated in GHGs with respect to atmospheric equilibrium, suggesting that groundwater contribute to the atmospheric GHGs budget. A third sampling campaign is carried out in 2016 including around 60 new groundwater samples. The combination of the results of the three campaigns allows: (1) reducing the uncertainties related to indirect emissions of GHG through groundwater-surface water interaction and (2) contributing to a better understanding of the occurrence of GHGs in aquifers. New results will be presented and discussed in detail in the presentation. [less ▲]Detailed reference viewed: 24 (2 ULg) Relectures de La Misère du monde: Bourdieu, Sartre, EnzensbergerCormann, Grégory Conference (2016, September 26)Detailed reference viewed: 17 (0 ULg) Le développement de l’agriculture familiale par les transferts des migrantsYao Namé, Juste Michel ; Lebailly, Philippe Conference (2016, September 25)The following pages report the results of our survey conducted among (Malian, Senegalese and Mauritanian) Soninké migrants during the period of 14th to 4 December 2015, living in the social residences of ... [more ▼]The following pages report the results of our survey conducted among (Malian, Senegalese and Mauritanian) Soninké migrants during the period of 14th to 4 December 2015, living in the social residences of the former home Pinel (first home of migrant workers in France). This survey had to aim to discuss the implementation and use of a new tool to transfer the money in order to reduce use of informal channels, to promote financial inclusion, to finance smallholding and to develop entrepreneurship in rural by granting of credits medium or long term via Microfinance Institutions (IMF). [less ▲]Detailed reference viewed: 27 (10 ULg) Analyse comparative des coûts de production rizicole dans les pays de la Communauté Economique des Pays des Grands Lacs (CEPGL).Furaha Mirindi, Germaine ; Lebailly, Philippe Conference (2016, September 23)Cet article fait une analyse comparative des résultats économiques de la production rizicole durant la saison B 2014 dans les trois pays de la CEPGL qui sont la République Démocratique du Congo, le Rwanda ... [more ▼]Cet article fait une analyse comparative des résultats économiques de la production rizicole durant la saison B 2014 dans les trois pays de la CEPGL qui sont la République Démocratique du Congo, le Rwanda et le Burundi. L’approche comparative permet de trouver les explications des différences des résultats en partie dans les politiques mises en œuvre dans chaque pays. Les enquêtes ont été menées dans la plaine de la Ruzizi partagée entre les trois pays auprès de 240 producteurs du riz choisi à partir de la méthode des quotas sur la base d'une stratification des exploitations rizicoles. Dans le site congolais (où il est plus difficile d’accéder aux intrants et crédits), les coûts de production d’1kg de paddy sont les plus élevés avec une fonction de production y=0,034x+0,053z+0,422 et le rendement le plus bas (2698kgs). Par contre, dans les sites burundais et rwandais où l’Etat intervient dans l’approvisionnement en intrants et particulièrement dans le site rwandais, l’accès aux crédits, les fonctions de production sont respectivement de y=0,024x+0,031z+0,297 et y=0,017x+0,023z+0,269 avec des rendements de 3962kgs et 5339kgs dans le même ordre. Les coûts de production supportés sur un hectare rizicole ou encore pour la production d’une tonne de paddy varient selon le pays car ils dépendent de la valeur des intrants utilisés et des autres charges de structures. Ils varient ainsi de 1139,4USD à 1354,5USD/ ha et de 269 à 422USD/tonne. [less ▲]Detailed reference viewed: 23 (6 ULg) Applications des relevés 3D au patrimoine, de l'acquisition au système d'information 3DHallot, Pierre ; Billen, Roland ; Poux, Florent et alConference (2016, September 23)Les techniques permettant l’acquisition 3D du patrimoine bâti sont maintenant assez mures et démocratiques pour être utilisées à grande échelle. De plus en plus d’édifices font l’objet d’une sauvegarde ... [more ▼]Les techniques permettant l’acquisition 3D du patrimoine bâti sont maintenant assez mures et démocratiques pour être utilisées à grande échelle. De plus en plus d’édifices font l’objet d’une sauvegarde numérique sous la forme de nuages de points colorés. Il reste néanmoins de nombreux défis à relever notamment pour : harmoniser les pratiques d’acquisition en terme de qualité et de précision, assurer l’interopérabilité entre les jeux de données ; exploiter pleinement l’information ponctuelle collectée ; et proposer une visualisation adéquate de ces grands jeux de données. Dans le cadre des développements réalisés à l’Unité de Géomatique de l’ULg, nous travaillons à la mise au point de systèmes d’informations permettant d’assurer un lien entre les informations sémantiques issues des applications archéologiques, architecturales, d’histoire de l’art avec les modèles 3D réalisés. La mise en place de ces systèmes d’informations passe par plusieurs étapes de recherche relatives à la sectorisation automatique, les structures de données, la définitions d’ontologies thématiques et finalement les règles sémiologiques de représentations dans un environnement virtuel 3D. Au cours de cette présentation, nous proposons de parcourir trois projets de recherche en cours au sein de l’Unité afin l’illustrer nos propos. Nous présenterons plus particulièrement le cas de la cathédrale Saint-Paul de Liège. [less ▲]Detailed reference viewed: 46 (10 ULg) Un morso di più: ecologia del cannibalismo in Salamandra salamandraMelotto, Andrea; Manenti, Raoul; Ficetola, Francesco et alConference (2016, September 23)Detailed reference viewed: 14 (0 ULg) « L’histoire est passée ». La production d’images-fantômes dans les projets de rénovation urbaine (Conclusions du colloque)Cormann, Grégory Conference (2016, September 23)Detailed reference viewed: 11 (1 ULg) Carbon xerogels: model materials to study the behavior of hard carbons as anodes for lithium-ion batteriesPiedboeuf, Marie-Laure ; Léonard, Alexandre ; Job, Nathalie Conference (2016, September 22)Detailed reference viewed: 9 (0 ULg) GAVRAY Claire (2016) The evolution of boys’ and girls’ attitudes and moods at the light of their historical opportunities : the case of violence and depression -Gavray, Claire Conference (2016, September 22)depression mood and violent behaviour are linked as a common dynamic amongst female teenargers but not amongst male ones ( twho different paths for them). The roots of depression and violence are ... [more ▼]depression mood and violent behaviour are linked as a common dynamic amongst female teenargers but not amongst male ones ( twho different paths for them). The roots of depression and violence are connected to gender socialisation (importance of lack of recognition and negative life events in private sphere for girls and in public sphere for boys). [less ▲]Detailed reference viewed: 13 (0 ULg) Competition of phonon and magnon effects in the temperature dependence of spinwave stiffnessOstler, Thomas ; Verstraete, Matthieu ; Di Gennaro, Marco et alConference (2016, September 21)Magnons are the elementary magnetic excitations in ordered solids. Understanding such collective excitations is important for a number of technologically relevant fields, such as, magnonics [1] or spin ... [more ▼]Magnons are the elementary magnetic excitations in ordered solids. Understanding such collective excitations is important for a number of technologically relevant fields, such as, magnonics [1] or spin caloritronics [2]. The central interactions in spin caloritronics are the couplings of phonons with electrons and spin degrees of freedom. Furthermore, understanding the effects of temperature on the phonon and spin degrees of freedom adds a further complexity. In the present work we have developed a multiscale model of ferromagnetic materials and demonstrate the effect of temperature dependent phonon displacements on the magnons spectra. Our results show that the for Fe and Ni the effect of phonon displacements acts to reduce the Curie temperature, whereas for Permalloy the opposite is true due to an increased long-ranged exchange interaction. This increased exchange interaction results in an increasing spin-wave stiffness with increasing temperature, overcoming the usual decrease due to magnon softening. To determine the effects of increasing the phonon temperature we have developed a multiscale model whereby we begin by calculating the thermal displacement of phonons, $\sqrt{\langle u^2(T) \rangle}$, calculated using the phonopy software package [3] using electronic ground state and phonon properties determined using the ABINIT software package [4]. Then the exchange constants are determined using the SPRKKR package [5]. Finally, we use linear spin wave theory to determine the effect of the phonon temperature on the exchange alone, demonstrating an increasing frequency of the acoustic magnon branch. We take into account the thermal effects of the magnetic system through the use of the atomistic spin dynamics approach. Magnon softening due to thermal effects demonstrates a more modest increase in the exchange stiffness (over the purely phononic effect), however, an overall increase is still observed. \newline \newline [1] A. V. Chumak, V. I. Vasyuchka, A. A. Serga, and B. Hillebrands, Nature Physics, {\bf 11}, 453–461 (2015). \newline [2] G. E. W. Bauer, E. Saitoh, and B. J. van Wees, Nature Materials {\bf 11}, 391 (2012). \newline [3] Atsushi Togo and Isao Tanaka, Scr. Mater., {\bf 108}, 1-5 (2015) \newline [4] X. Gonze \textit{et al.} Computer Physics Communications {\bf 180}, 2582-2615 (2009). \newline [5] T. Huhne \textit{at al.} Physical Review B, {\bf 58}, 10236 (1998). [less ▲]Detailed reference viewed: 61 (1 ULg) Die Familie von Medem. Zur Verbindung von Bildung, Literatur und Politik in KurlandLeyh, Valérie Conference (2016, September 21)Detailed reference viewed: 12 (0 ULg) Study on contribution of lipids towards the mechanical properties of milk fat globule membrane monolayerMalik, Priyanka ; Danthine, Sabine ; Blecker, Christophe Conference (2016, September 20)Milk fat globule membrane (MFGM) stabilizes fat globule in milk in form of emulsion. The primary monolayer of MFGM is rich in proteins and secondary bilayer is rich in polar lipids. MFGM finds application ... [more ▼]Milk fat globule membrane (MFGM) stabilizes fat globule in milk in form of emulsion. The primary monolayer of MFGM is rich in proteins and secondary bilayer is rich in polar lipids. MFGM finds application as an additive in dairy and food industry (e.g. emulsions, infant formulas & reduced-fat products) for its emulsifying and stabilizing properties. MFGM received much attention in recent years due to both its health- beneficial & technological functionalities. This work has been carried out with the objective to understand contribution of various components towards the surface properties of complete MFGM. MFGM was isolated from fresh raw cream. During isolation of MFGM apart from polar lipids and MFGM proteins, neutral lipids are also isolated which have their origin in fat globules but are often considered as a constituent of MFGM. The MFGM was further fractioned into lipid fraction, defatted fraction and polar lipids. The mechanical properties of monolayer were studied for the above fractions using Langmuir film balance. Study of surface properties can also be linked to their techno-functional properties by calculating film elasticity of the compression isotherm which can be linked to emulsifying and stabilizing properties. The analysis of compression isotherms revealed that film elasticity is highly influenced by polar lipids. The behaviour of the MFGM appeared to be influenced by neutral lipid and defatted fraction during beginning of compression and by polar lipids at the end of compression. [less ▲]Detailed reference viewed: 25 (8 ULg) Relationships between mind-wandering, personal goals processing, and future thinking.Stawarczyk, David ; D'Argembeau, Arnaud Conference (2016, September 20)Mind-wandering refers to the occurrence of thoughts whose content is both decoupled from stimuli present in the immediate environment and unrelated to the task currently being carried out. Although this ... [more ▼]Mind-wandering refers to the occurrence of thoughts whose content is both decoupled from stimuli present in the immediate environment and unrelated to the task currently being carried out. Although this phenomenon has been the object of increasing interest from the scientific community during le last decade, proportionally few studies have attempted to clearly determine the form, content, and possible functions of this particular kind of cognitions. In this presentation, we will review recent evidence from studies mainly performed in our lab suggesting that most instances of mind-wandering refer to the anticipation and planning of future events and are also closely related to the processing of personal goals. More specifically, we will first discuss the findings from behavioral research that examined the phenomenological features of mind-wandering with the use of experience sampling procedures during laboratory tasks. Results of these studies mainly revealed that most of reported mind-wandering episodes are temporally oriented towards the future and that this ‘prospective bias’ can be increased when participants’ attention had been oriented toward their personal goals prior to performing the tasks. We will next review the results of neuroimaging studies that investigated the neural correlates of mind-wandering and we will more specifically focus on meta-analytic evidences suggesting that the neural correlates of mind-wandering strongly overlap with those associated with episodic future thinking and personal goal processing. Together, these results suggest that mind-wandering may have an important adaptive value and could in particular play a key role in planning and preparing for upcoming events related to the individuals’ personal goals. [less ▲]Detailed reference viewed: 55 (1 ULg) L'épisode inaugural de l'adolescent: favoriser un diagnostic et une prise en charge précoceSimon, Michaël Conference (2016, September 17)Detailed reference viewed: 19 (2 ULg) Impact des contacts intergénérationnels sur la représentation des personnes âgées chez les enfants et les adolescentsFlamion, Allison ; Missotten, Pierre ; Adam, Stéphane Conference (2016, September 17)Detailed reference viewed: 12 (4 ULg) What’s the difference? Results of a functional study of Aterian and Mousterian tools from the site of Ifri n’Ammar (Morocco)Tomasso, Sonja ; Rots, Veerle Conference (2016, September 16)Until today, the definition of the North African Mousterian has been based on a systematic comparison with the European Mousterian. Particularly the “Aterian” and its tanged tools have been widely ... [more ▼]Until today, the definition of the North African Mousterian has been based on a systematic comparison with the European Mousterian. Particularly the “Aterian” and its tanged tools have been widely discussed. Researchers considered the tanged Aterian tools as early indications of the existence of hafting techniques [1]. It is currently not entirely understood how the Aterian relates to the Mousterian in North Africa, whether tanged tools can indeed be linked with hafting, and whether non-tanged tools were also hafted, which could indicate that a variety in hafting techniques existed. The site of Ifri n’Ammar presents an ideal chance to compare Aterian and Mousterian technocomplexes. The rock shelter is located in the eastern Moroccan Rif and has a rich and well preserved stratigraphy where Middle Paleolithic tools are abundantly represented [2]. At Ifri n’Ammar, the Aterian and Mousterian assemblages are inter-stratified, which means that the relationship of these industries cannot simply be explained in terms of chronological succession [2,3]. The density of retouched artefacts differs between the Aterian and the Mousterian levels and tanged tools are present in the denser Aterian levels only. These levels also show a higher overall tool frequency. We present the results of a functional study focusing on the artefacts from the upper levels (“Occupation supérieure”) of Ifri n’Ammar, dated between 83 ± 6 ka and 130 ± 8 ka [3]. The functional study was combined with a specific experimental program designed to address questions raised during the analysis of the archaeological material, with a specific focus on hafting. Diagnostic microscopic wear patterns confirm that the tanged tools were used while hafted. Tanged tools did not prove to be related to hunting activities only, but various tool uses could be identified. They all fit, however, within the context of hunting and animal processing activities. The reuse of hafted armatures for other activities is not evident in the present sample. [less ▲]Detailed reference viewed: 20 (2 ULg) Cdk1 is essential for long-term maintenance of neural stem cells in the postnatal hippocampusVandenbosch, Renaud Conference (2016, September 16)Detailed reference viewed: 9 (1 ULg) IntroductionMasson, Christophe Conference (2016, September 15)Detailed reference viewed: 10 (0 ULg) Daily variations in basic neuronal function and their relationships with cognition in younger and older individualsVandewalle, Gilles Conference (2016, September 15)Detailed reference viewed: 9 (1 ULg) La Paix de Fexhe : un texte, des acteursMasson, Christophe Conference (2016, September 15)La Paix de Fexhe fut le résultat d’un compromis entre les cinq différents « partis » politiques liégeois de l’époque : le prince-évêque, le chapitre cathédral de Saint-Lambert, le « patriciat » urbain, la ... [more ▼]La Paix de Fexhe fut le résultat d’un compromis entre les cinq différents « partis » politiques liégeois de l’époque : le prince-évêque, le chapitre cathédral de Saint-Lambert, le « patriciat » urbain, la noblesse et les artisans. Nous étudierons donc dans le cadre de cette contribution l’identité de ces partis, ainsi que celles des délégués qu’ils envoyèrent à Fexhe, leur « agenda politique » et leurs moyens d’action. Nous reviendrons ensuite sur la part que chacun prit à la rédaction du texte du 18 juin 1316 et de ses deux compléments ratifiés le même jour et le lendemain, ce qui nous permettra de mesurer la place que chacun put faire tenir à ses revendications, nuançant, pour le moins, la lecture « démocratique » ou « ecclésio-paternaliste » en cours depuis le xixe siècle. De façon complémentaire, nous mettrons en évidence les champs d’application et les limites de ces textes, en les articulant avec ceux qui les précédèrent afin de mieux en percevoir les implications sur la longue durée de l’histoire liégeoise. [less ▲]Detailed reference viewed: 11 (0 ULg) THERMO-ECONOMIC OPTIMIZATION OF ORGANIC RANKINE CYCLE SYSTEMS FOR WASTE HEAT RECOVERY FROM EXHAUST AND RECIRCULATED GASES OF HEAVY DUTY TRUCKSGuillaume, Ludovic ; Legros, Arnaud; Lemort, Vincent Conference (2016, September 14)Waste heat recovery (WHR) ORC is a very promising technology for reducing fuel consumption and consequently the CO2 emissions of future heavy-duty trucks (HDT). Nonetheless, the adoption of this ... [more ▼]Waste heat recovery (WHR) ORC is a very promising technology for reducing fuel consumption and consequently the CO2 emissions of future heavy-duty trucks (HDT). Nonetheless, the adoption of this technology in the automotive domain requires specific R&D activities going from the system definition to the on-board integration. This study focuses on the preliminary design phase of ORC systems recovering the heat wasted from two of the sources available on a HDT: the exhaust and recirculated gases. From these heat sources and their combinations, 6 possible architectures are identified. On the other hand, 4 volumetric expansion machine technologies are considered (Scroll, Screw, Piston and Vane Expanders). At the end, 24 topologies are modelled considering only the main components (Pump, Heat exchangers, Expansion machines). A three-step optimization method is proposed to identify the most promising system. First, the most suitable design conditions are identified using a simple model of expansion machine. In a second step, the design phase, using more detailed models for the expansion machines, a thermodynamic and economic optimizations are performed. Finally, in a third step, the output power of the latter system models is maximized in off-design conditions. [less ▲]Detailed reference viewed: 38 (2 ULg) Assessment of vertical contamination of Cd, Pb and Zn in soils around a former ore smelter in Wallonia, BelgiumLiénard, Amandine ; Colinet, Gilles Conference (2016, September 14)Examples of sites contaminated by atmospheric fallouts are numerous across former industrial areas, among which the valleys of Sambre and Meuse in Wallonia hosted metal ore treatment factories. We have ... [more ▼]Examples of sites contaminated by atmospheric fallouts are numerous across former industrial areas, among which the valleys of Sambre and Meuse in Wallonia hosted metal ore treatment factories. We have studied the fate of Cd, Pb and Zn in soils affected by atmospheric deposition in the vicinity of old smelters. The importance of vertical redistribution of contaminants in soils is questioned and the aims of this paper are to i) characterize the vertical distribution of TEs and soil properties along diverse soil profiles, ii) evaluate enrichment or impoverishment of TEs along the profiles to discriminate anthropogenic or geogenic origin of contaminations and iii) evaluate whether soil type or land use influenced the mobility of contaminants in the selected profiles. Concentrations of trace elements (Cd, Co, Cr, Cu, Ni, Pb, and Zn) and major elements (Ca, Mg, K, Fe, Al, and Mn) as well as pHKCl and TOC were measured on 22 profiles located in a 3 km radius of a former ore treatment plant in Wallonia (Belgium). Enrichment factor (EF), vertical impoverishment factor (VIF), and availability ratio (AR) were used as diagnostic tools of contamination and migration of Cd, Pb, and Zn in profiles. Data revealed that soil profiles are significantly contaminated. The ranges of enrichment factors for Cd (17-3570), Pb (1-2883), and Zn (2-309) are very broad with the higher EF in the topsoil of profile. VIFs of subhorizons are rarely above 1. In a few remaining cases with VIF > 1, the main factor explaining is soil type (especially, Colluvic Regosols, Luvisols, and, Cambisols with shale load). Cd, Pb and Zn ARs are strongly correlated with TOC and to a lesser extent with pHKCl. Pb and Zn ARs are influenced by soil type and land use only plays on Zn AR. The Cd availability is independent by these two factors. The contents of trace elements measured in soil profiles are very high especially in topsoil. Until now, the Cd, Pb, and Zn vertical distribution shows a low migration from topsoil up to depth. However, we must not minimize the hazard of a future potential transfer. [less ▲]Detailed reference viewed: 17 (1 ULg) DYNAMIC MODELING OF WASTE HEAT RECOVERY ORGANIC RANKINE CYCLE SYSTEMS IN THE AMESIM PLATFROMGuillaume, Ludovic ; Ameel, Bernd; Criens, Chris et alConference (2016, September 14)ORC waste heat recovery is a very promising technology for reducing fuel consumption and consequently the CO2 emissions of future heavy-duty trucks. Because of the transient nature of the heat sources ... [more ▼]ORC waste heat recovery is a very promising technology for reducing fuel consumption and consequently the CO2 emissions of future heavy-duty trucks. Because of the transient nature of the heat sources encountered on a truck, dynamic simulations are an essential part of the design process of ORC systems for truck applications. Dynamic models are useful for component design, control design and transient evaluation of ORC systems. To ease the burden of building numerous dynamic models of different candidate ORCs while the design process is ongoing, a library of generic dynamic models of ORCs is built in this work. These models work in synergy with a steady-state ORC design tool in which is added a function to automatically populate the parameters of the dynamic models. In this work, the dynamic model library and their parameterization process in LMS AMESim are described. The platform is largely used in automotive industry and offers a variety of libraries: Engine, Control, Two-Phase Flow, etc. Finally, the dynamic models are compared against the steady-state models and experimental data. [less ▲]Detailed reference viewed: 30 (1 ULg) Is Ambrosia artemisiifolia L. able to expand its invaded range northward in Western Europe?Ortmans, William ; Mahy, Grégory ; Monty, Arnaud Conference (2016, September 13)Ambrosia artemisiifolia L. (common ragweed, Asteraceae) is an invasive weed causing a health crisis in Europe, due to its highly allergenic pollen. In Western Europe the invaded range covers most of ... [more ▼]Ambrosia artemisiifolia L. (common ragweed, Asteraceae) is an invasive weed causing a health crisis in Europe, due to its highly allergenic pollen. In Western Europe the invaded range covers most of central and southern France, and northern Italy. Northwards beyond the edge of this range, occurrence of casual population have been described for years, but these populations do not appear to become invasive, and the species does not seem to spread. This situation raises the following question: Has the invaded range reached a limit or will the species continue its invasion northwards? To answer this question, we followed two complementary approaches. First we set up an experimental garden in Belgium, 250 km north to the current invaded range, to see if the local climate allows the completion of the species reproduction cycle. Second, we performed an in situ measurement campaign in 12 population located beyond the edge, within the range but near the margin, and in the center of the invaded range. The aim of this campaign was to test whether the species had reduced plant performance towards range margins. The results showed that the species is able to establish populations with high growth rates in Belgium. Furthermore, the species expressed similar performance across the considered areas, even beyond the current invasion front. No evidence of processes constraining the invasion was found, which suggests a great potential for invasion north to the current invaded range. In this uncertain situation, awareness actions should be considered in the northern countries. [less ▲]Detailed reference viewed: 9 (1 ULg) Human sleep and wakefulness in the lab: from behavior to electrophysiology and neuroimagingVandewalle, Gilles Conference (2016, September 13)Detailed reference viewed: 14 (2 ULg) Investigating the effect of plant-derived amendments on PAHs degradation in brownfield contaminated soilsDavin, Marie ; Starren, Amandine ; Colinet, Gilles et alConference (2016, September 13)Polycyclic aromatic hydrocarbons (PAHs) are a class of persistant organic compounds of major concern that tend to accumulate in the environment, damaging ecosystems and health. Brownfields represent an ... [more ▼]Polycyclic aromatic hydrocarbons (PAHs) are a class of persistant organic compounds of major concern that tend to accumulate in the environment, damaging ecosystems and health. Brownfields represent an important tank for PAHs that require remediation. As an alternative to environmentally aggressive, expensive and often disruptive soil remediation strategies, experiences have been carried on to understand and develop techniques based on bioremediation and phytoremediation. PAHs degradation experiments were conducted in microcosms (laboratory scale) in order to determine whether several plant-derived amendments could enhance bioremediation. Briefly, samples of aged contaminated soils were treated with different concentrations of Medicago sativa or Trifolium pratense root exudates or dried roots, commercial saponin, a natural surfactant found in some plant roots such as some Fabaceae, and some samples were left unamended as controls. Soil samples were incubated for two and four weeks at controlled temperature (28°C). Carbon dioxide emission was monitored throughout the whole incubation. At the end of each experiment, dehydrogenase activity was measured as an indicator of microbiological activity and residual PAHs were determined using High-Performance Liquid Chromatography with Fluorimetric Detection (HPLC-FLD). In total, eleven amendment modalities and two incubation periods were tested and repeated four times. Preliminary experiments show promising results as amended samples seem to show different respiration activities. Ongoing studies will allow discussion as to whether or not PAHs degradation is influenced by the different modalities and if there are any differences according to the nature and concentration of the amendment. [less ▲]Detailed reference viewed: 32 (2 ULg) Merging carbon dioxide utilization, bio-resources and CO2-based process for sustainable low carbon footprint polyurethanesDetrembleur, Christophe ; Alves, Margot ; Grignard, Bruno et alConference (2016, September 13)Detailed reference viewed: 14 (3 ULg) Organocatalytic ring-opening polymerization towards polyphosphoestersClément, Benoit; Vanslambrouck, Stépanie; Carion, Stéphan et alConference (2016, September 13)Hydrolytically degradable and biocompatible aliphatic polyesters are widely applied for biomedical applications as implants, scaffolds for tissue engineering and, finally, as nanocarriers for drug ... [more ▼]Hydrolytically degradable and biocompatible aliphatic polyesters are widely applied for biomedical applications as implants, scaffolds for tissue engineering and, finally, as nanocarriers for drug delivery. Aliphatic phophoesters, known since the pioneering work of S. Penczek in the 70’s, exhibit the same properties of hydrolytic degradability and biocompatibility and are thus more and more studied for biomedical applications as well. In the field of materials, anti-fire properties opens up new perspectives. The difference between polyesters and polyphosphoesters in terms of synthesis and properties will be highlighted. Polyphosphosphoesters are synthesized by step-growth and chain growth polymerization. When these polyphosphoesters are synthesized by ring-opening polymerization of cyclic phosphoesters, organocatalysts turned out to be very efficient compared to coodination processes. The last part of the talk will deal with te implementation of ROP of cyclic phosphates towards a series of amphiphilic PEO-block-polyphosphate copolymers of tailored hydrophobicity depending on the length of the lateral alkyl group. These polymers are able to self assemble into nanoparticles by direct dissolution in water, thus in the absernce of any organic solvent. The so-obtained micelles were studied by a set of techniques (Pyrene Fluorescence, Dynamic Light Scattering, Tensiometry). Finally, the influence of the hydrophobicity of the polyphosphate block of the micelle on the encapsulation and the release of a model drug was investigated. [less ▲]Detailed reference viewed: 28 (5 ULg) Joint learning and pruning of decision forestsBegon, Jean-Michel ; Joly, Arnaud ; Geurts, Pierre Conference (2016, September 12)Decision forests such as Random Forests and Extremely randomized trees are state-of-the-art supervised learning methods. Unfortunately, they tend to consume much memory space. In this work, we propose an ... [more ▼]Decision forests such as Random Forests and Extremely randomized trees are state-of-the-art supervised learning methods. Unfortunately, they tend to consume much memory space. In this work, we propose an alternative algorithm to derive decision forests under heavy memory constraints. We show that under such constraints our method usually outperforms simpler baselines and can even sometimes beat the original forest. [less ▲]Detailed reference viewed: 15 (3 ULg) SLDC: an open-source workflow for object detection in multi-gigapixel imagesMormont, Romain ; Begon, Jean-Michel ; Hoyoux, Renaud et alConference (2016, September 12)Detailed reference viewed: 23 (8 ULg) Random subspace with trees for feature selection under memory constraintsSutera, Antonio ; Châtel, Célia; Louppe, Gilles et alConference (2016, September 12)Detailed reference viewed: 25 (6 ULg) Influence of grain boundaries on the COads monolayer oxidation and oxygen reduction reaction kineticsAsset, Tristan ; Chattot, Raphaël; Nelayah, Jaysen et alConference (2016, September 12)Detailed reference viewed: 36 (0 ULg) How spending ten years in Raymond Lemaire's archive changed my vision on heritage conservationHoubart, Claudine Conference (2016, September 12)Detailed reference viewed: 18 (1 ULg) Microstructural design using stress–based topology optimizationCollet, Maxime ; Bruggi, Matteo; Noël, Lise et alConference (2016, September 12)New additive manufacturing techniques break the limitations encountered for years when producing components descending from topology optimization. Classical design procedures focus on macro-structural ... [more ▼]New additive manufacturing techniques break the limitations encountered for years when producing components descending from topology optimization. Classical design procedures focus on macro-structural optimization to sustain given loads but today innovative manufacturing processes allow considering structures exhibiting tailored microstructures, i.e. the well known microstructural design. The practical applications of structures including material design is mainly motivated by the greater performances that can be achieved compared to classical solutions. Microstructural design has been shown a great interest as attested by recent works. However, stress–based topology optimization has not yet been extensively exploited when addressing microstructural design using numerical homogenization though stress constraints is an important feature and have gained in interest in the field of topology optimization. This contribution investigates the problem of material design enforcing stress constraints within periodic microstructures by considering a representative volume element (RVE) subject to prescribed strain fields. The SIMP approach is adopted as material interpolation law while the optimization problems are solved using a sequential convex programming approach. In particular the well known method of moving asymptotes (MMA) is considered. Numerical homogenization is used to assess the effective elastic properties of the microstructures. The Von Mises stress criterion is used to impose the constraints on the stress level. This work discusses the formulation of a well-posed design problem as well as some numerical issues encountered. The developed solution procedure is first validated by comparison against analytical results, e.g. the single inclusion of Vigdergauz microstructure. [less ▲]Detailed reference viewed: 26 (2 ULg) Overhanging Constraints in Addivitive Manufacturing Using Two Different ToolsBauduin, Simon ; Collet, Maxime ; Duysinx, Pierre Conference (2016, September 12)Topology optimization is widely used as a design tool for advanced application in mechanical, aerospace and automotive industries. This technique offers an optimal distribution of a predetermined amount ... [more ▼]Topology optimization is widely used as a design tool for advanced application in mechanical, aerospace and automotive industries. This technique offers an optimal distribution of a predetermined amount of material in a given design space. In the last years, a lot of efforts has been invested into the development of high performance methods such as homogenization, SIMP or BESO. However as the state of the art in manufacturing experiences evolution, a coupling between topology optimization and additive manufacturing is needed. Additive manufacturing has numerous advantages that fits the characteristics of topology optimized designs. It can manufacture highly complex design without high cost increase and furthermore continuous density material of the SIMP method could be manufactured by lattice structures. With all the opportunities given by the additive manufacturing the urge to bind the last one to topology optimization is heavily required. Specific constraints related to manufacturing issues have to be taken into account such as the need of supports structures to ensure a good heat evacuation during the manufacturing process, as well as to hold up overhanging section. Some researches have been done to try to include this constraint in the optimization problem such as Leary and al or Andrew T. Gaynor. However this work focuses on 2 different methods (projection scheme and mechanical approach) to tackle the overhanging problem and compare them . [less ▲]Detailed reference viewed: 16 (2 ULg) Linkages and production and marketing of rice vermicelli in traditional craft villages of Bac Giang provinceLe Thy Long, Vy; Nguyen Huu, Nhuan; Lebailly, Philippe Conference (2016, September 10)Detailed reference viewed: 18 (7 ULg) Implications de la perspective en première personne en psychopathologie : le cas de la schizophrénieEnglebert, Jérôme ; Valentiny, CarolineConference (2016, September 09)Les approches traditionnelles de la schizophrénie en psychiatrie se centrent essentiellement sur une perspective que l’on peut qualifier de perspective en « troisième personne ». Ces considérations ... [more ▼]Les approches traditionnelles de la schizophrénie en psychiatrie se centrent essentiellement sur une perspective que l’on peut qualifier de perspective en « troisième personne ». Ces considérations tentent, de l’extérieur, de circonscrire les difficultés auxquelles sont confrontées les personnes affectées d’une psychopathologie. Dans le cas de la schizophrénie, les manuels insistent notamment sur les symptômes délirants et hallucinatoires – signes sur lesquels, de facto, le clinicien et le patient ne peuvent s’entendre et rencontrer une phénoménologie commune. Une autre voie d’approche, s’inscrivant dans la tradition phénoménologique, propose d’explorer les phénomènes à partir du discours et du vécu subjectif des patients – dans une perspective en « première personne ». À partir d’une recherche récemment menée, nous explorerons le vécu subjectif de six patients schizophrènes à l’aide de l’échelle EASE (Examination of Anomalous Self-Experience). Cette échelle pose des balises dans la co-construction d’une narrativité permettant l’investigation d’expériences liées aux troubles du soi. Ce choix méthodologique s’ancre dans une volonté de laisser la place à l’étonnement, de ne pas pré-penser, ou le moins possible, le recueil d’expériences. Les analyses des phénomènes décrits par les patients se nourrissent des travaux de la psychopathologie phénoménologique (Blankenburg, Minkowski, Tatossian, Stanghellini, Sass, …) et se veulent un aller-retour constant entre théorie et clinique. Dans ce contexte, nous approfondirons l’hypothèse proposée par Louis Sass selon laquelle la folie, du moins dans certaines de ses formes, pourrait dériver d’une intensification plutôt que d’un affaiblissement de la conscience. L’hyper-réflexivité schizophrénique – indiquant une focalisation explicite et réflexive sur des phénomènes a priori implicites et préréflexifs – sera particulièrement analysée à partir des descriptions recueillies. Après avoir développé, à partir des cas cliniques, cette hypothèse d’une « hyper-conscience » comme symptôme cardinal de l’expérience subjective de la schizophrénie, nous analyserons les implications du recours à la perspective en « première personne » sur la prise en charge, les modèles de soins et la manière de concevoir le rapport au monde de ces patients. [less ▲]Detailed reference viewed: 65 (6 ULg) Présidence et discussion de l’atelier « Quand le diagnostic glisse : statut du corps, statut de la parole »Englebert, Jérôme Conference (2016, September 09)Detailed reference viewed: 27 (1 ULg) Sécurité et santé au travail dans les bassins miniers wallons des années ’50Geerkens, Eric Conference (2016, September 08)Detailed reference viewed: 21 (1 ULg) Measurement of Innovation: Where Do We Stand?Artige, Lionel Conference (2016, September 08)Detailed reference viewed: 14 (2 ULg) Seroprevalence of Borrelia burgdorferi in horses in the southern part of Belgium: a “one health” driven studyMeersschaert, Carole; Cerri, Simona ; Houben rosa, Rosa et alConference (2016, September 08)Detailed reference viewed: 28 (1 ULg) Unified treatment of microscopic boundary conditions in computational homogenization method for multiphysics problemsNguyen, Van Dung ; Wu, Ling ; Homsi, Lina et alConference (2016, September 08)Computational homogenization (so-called FE2) method is an effective tool to model complex behavior of heterogeneous media allowing direct coupling between the structure response and the evolving ... [more ▼]Computational homogenization (so-called FE2) method is an effective tool to model complex behavior of heterogeneous media allowing direct coupling between the structure response and the evolving microstructure not only in purely mechanical problems but also in multiphysics problems [1]. The basic idea of this method is to obtain the macroscopic constitutive relationships from the resolution of the microscopic boundary value problem (BVP) defined on a representative volume element. This method does not requires any constitutive assumption at the macroscopic level, but an appropriate microscopic boundary condition has to be defined. Our work focuses on the unified treatment of the microscopic boundary condition in a multiphysics microscopic BVP. In particular, an efficient way to compute the tangent operator is developed for an arbitrary kind of boundary conditions. When considering the FE2method, the homogenized stresses and homogenized tangents at every macroscopic integration points are required. From the energy consistency condition between macroscopic and microscopic problems, the homogenized stresses can be easily computed by the volumetric averaging integrals of the microscopic counterparts. The required homogenized tangents often follows a stiffness condensation from the microscopic stiffness matrix at the equilibrium state [2]. When using the stiffness condensation, the microscopic stiffness matrix needs to be partitioned, and dense matrices based on Schur complements (under a matrix form 𝐊̃ 𝑏𝑏=𝐊𝑏𝑏−𝐊𝑏𝑖𝐊𝑖𝑖−1𝐊𝑖𝑏) have to be estimated. The matrix operations based on Schur complements require a large time consuming and a lot of memory when increasing the number of degrees of freedom of the microscopic BVPs. This work proposes an efficient method allowing to compute the homogenized tangents without significant effort. The microscopic stiffness matrix does not need to be partitioned. The homogenized tangents are computed by solving a linear system, which is based on the linearized system at the converge solution of the microscopic BVP, with multiple right hand sides. With proposed numerical improvements, the FE2 method is used in a fully thermo-mechanically-coupled simulation. The temperature-dependent elastoplastic behavior, thermal conduction as well as the heat conversion from the mechanical deformation are considered in the hyperelastic large strain framework. [1]. Geers, M. G. D., Kouznetsova, V. G., Brekelmans, W. A. M., 2010. J. Comput. Appl. Math. 234 (7), 2175-2182. [2]. Kouznetsova, V., Brekelmans, W. A. M., Baaijens, F. P. T., 2001. Comput. Mech. 27 (1), 37-48. [less ▲]Detailed reference viewed: 24 (4 ULg) New computational method of the ball/race contacts transverse loads of high speed ball bearings without race control hypothesisServais, Christophe ; Bozet, Jean-Luc Conference (2016, September 08)Detailed reference viewed: 13 (1 ULg) A coupled electro-thermo-mechanical discontinuous Galerkin method applied on composite materialsHomsi, Lina ; Noels, Ludovic Conference (2016, September 07)Carbon fiber reinforced polymer composites have become increasingly important due to their unique properties which are appreciated in many practical applications such as low weight, low cost, low density ... [more ▼]Carbon fiber reinforced polymer composites have become increasingly important due to their unique properties which are appreciated in many practical applications such as low weight, low cost, low density, high mechanical characteristics. Moreover the range of their electrical conductivity can be controlled by the amount of carbon fibers. Carbon fiber reinforced polymer composites consist of at least two components, a polymer matrix (generally dielectric) and electrically conductive fillers. This combination results in multifunctional composites, both structural and conductive. The existence of the polymer matrix will avoid catastrophic failure due to fiber breaking, and the existence of the carbon fibers will enhance strength and stiffness on one hand, and will allow to a significant temperature gradient when electric current is applied on the other hand. The objective of this paper is to study the response of the carbon fiber reinforced polymer composites when an electric power is applied and to determine the effective properties. To this end governing equations describing electro-thermo-mechanical coupling in composite materials are developed and discretized using the Discontinuous Galerkin (DG) finite element method. DG methods have many advantages such as optimal convergence and local approximation properties in addition to their flexibility for mesh adaption and their straightforward use of high order polynomial approximations. A micromechanical model of unidirectional carbon fibers dispersed in a polymer matrix is formulated considering the interaction of electrical, thermal and mechanical fields It is then solved using the DG method to determine the time dependent response of the electro-thermo-mechanical coupling and quantify the variation of the fields. [less ▲]Detailed reference viewed: 25 (4 ULg) Probabilistic prediction of the quality factor of micro-resonator using a stochastic thermo-mechanical multi-scale approachWu, Ling ; Lucas, Vincent ; Golinval, Jean-Claude et alConference (2016, September 07)As the size of the device is only one or two orders of magnitude higher than the size of the grains, the structural properties, such as the thermo-elastic quality factor (Q), of micro-electro-mechanical ... [more ▼]As the size of the device is only one or two orders of magnitude higher than the size of the grains, the structural properties, such as the thermo-elastic quality factor (Q), of micro-electro-mechanical systems (MEMS) made of poly-crystalline materials exhibit a scatter, due to the existing randomness in the grain size, grain orientation, surface roughness... In order to predict the probabilistic behavior of micro-resonators, the authors extend herein a previously developed stochastic 3-scale approach [1] to the case of thermoelastic damping [2]. In this method, stochastic volume elements (SVEs) [3] are defined by considering random grain orientations in a tessellation. For each SVE realization, the mesoscopic apparent elasticity tensor, thermal conductivity tensor, and thermal dilatation tensor can be obtained using thermo-mechanical computational homogenization theory [4]. The extracted mesoscopic apparent properties tensors can then be used to define a spatially correlated meso-scale random field, which is in turn used as input for stochastic finite element simulations. As a result, the probabilistic distribution of the quality factor of micro-resonator can be extracted by considering Monte-Carlo simulations of coarse-meshed micro-resonators, accounting implicitly for the random micro-structure of the poly-silicon material. [1] V. Lucas, J.-C. Golinval, S. Paquay, V.-D. Nguyen, L. Noels, L. Wu, A stochastic computational multiscale approach; Application to MEMS resonators. Computer Methods in Applied Mechanics and Engineering, 294, 141-167, 2015. [2] L. Wu, V. Lucas, V.-D. Nguyen, J.-C. Golinval, S. Paquay, L. Noels, A Stochastic Multiscale Approach for the Modeling of Thermoelastic Damping in Micro-Resonators. Submitted. [3] M. Ostoja-Starzewski, X.Wang, Stochastic finite elements as a bridge between random material microstructure and global response, Computer Methods in Applied Mechanics and Engineering, 168, 35--49, 1999. [4] I. Özdemir, W. A. M. Brekelmans, M. G. D. Geers, Computational homogenization for heat conduction in heterogeneous solids, International Journal for Numerical Methods in Engineering 73, 185-204, 2008. [less ▲]Detailed reference viewed: 20 (1 ULg) GPS, Galileo and BeiDou inter-system biases estimation in relative positioning with code and phase pseudorangesDeprez, Cécile ; Warnant, René Conference (2016, September 07)The recent increase in the number of Global Navigation Satellite Systems (GNSS) opens new perspectives in the ﬁeld of high precision positioning. Particularly, the Chinese BeiDou satellite system and the ... [more ▼]The recent increase in the number of Global Navigation Satellite Systems (GNSS) opens new perspectives in the ﬁeld of high precision positioning. Particularly, the Chinese BeiDou satellite system and the European Galileo program have experienced major progress in 2015 and 2016 with the launch of 7 and 8 satellites respectively. Associated with the ongoing GPS modernization, many more frequencies and satellites are now available. Therefore, multi-GNSS relative positioning based on overlapping frequencies should entail better accuracy and reliability in position estimations. However, the diﬀerences between satellite systems induce inter-system biases (ISBs) inside the multi-GNSS equations of observation. The combined use of L1 and L5 from GPS with E1 and E5a from Galileo, B2 from BeiDou and E5b from Galileo in zero baseline double diﬀerences (ZB DD) based on a unique pivot satellite is employed to resolve ISBs. This model removes all the satellite- and receiver-dependent error sources by diﬀerentiating and the zero baseline conﬁguration allows atmospheric and multipath eﬀects elimination. An analysis of the long-term stability of ISBs (GPS- Galileo and Galileo - BeiDou) is conducted onvariouspairsof receiversover large timespans. Thepossibleinﬂuenceof temperature variations inside the receivers over ISB values is also investigated. Our study is based on the 6 multi-GNSS receivers (2 Septentrio PolaRx4, 1 Septentrio PolaRxS, 1 Septentrio PolaRx5 and 2 Trimble NetR9) installed on the roof of our building in Liege. The estimated ISBs are then used as corrections in the multi-GNSS observation model and the resulting accuracy of multi-GNSS positioning is compared to GPS, Galileo and BeiDou standalone solutions. [less ▲]Detailed reference viewed: 33 (6 ULg) Auxetic inclusions in cellular solids allow tailoring Poisson’s ratio and enhancing stiffnessZorzetto, Laura ; Ruffoni, Davide Conference (2016, September 07)Detailed reference viewed: 28 (5 ULg) Simulations of composite laminates inter and intra-laminar failure using on a non-local mean-field damage-enhanced multi-scale methodWu, Ling ; Adam, Laurent; Bidaine, Benoît et alConference (2016, September 07)The failure of carbon fiber reinforced composite laminates is studied using a multiscale method. A non-local mean-field homogenization (MFH) method accounting for the damage evolution of the matrix phase ... [more ▼]The failure of carbon fiber reinforced composite laminates is studied using a multiscale method. A non-local mean-field homogenization (MFH) method accounting for the damage evolution of the matrix phase of the composite material [1] is considered in each ply in order to capture the intra-laminar failure. In that formulation, an incremental-secant MFH approach is used to account for the elastic unloading of the fibers during the strain softening of the matrix. In order to avoid the strain/damage localization caused by the matrix material softening, the damage enhanced MFH was formulated in an implicit non-local way [2]. Accurate predictions of the composite softening behavior and of the different phases response is then achieved. The delamination process is modeled by recourse to a hybrid discontinuous Galerkin (DG)/ extrinsic cohesive law approach. An open-hole composite laminate with a quasi-isotropic sequence ([90/45/-45/90/0]S) is then studied experimentally and using the multiscale method [3]. The numerical model is found to predict the damage bands along the fiber directions in agreement with the experimental samples inspected by X-ray computed tomography (XCT). Moreover, the predicted delamination pattern is found to match the experimental observations. Finally, with a view to stochastic analysis, the effect of the volume fraction and orientation variations on the failure is studied by defining them as random variables. REFERENCES [1] L. Wu, L. Noels, L. Adam, I. Doghri, An implicit-gradient-enhanced incremental-secant mean- field homogenization scheme for elasto-plastic composites with damage, International Journal of Solids and Structures, 50, 3843-3860, 2013. [2] R. Peerlings, R. de Borst, W. Brekelmans, S. Ayyapureddi, Gradient-enhanced damage for quasi-brittle materials. International Journal for Numerical Methods in Engineering, 39, 3391-3403, 1996. [3] L. Wu, F. Sket, J.M. Molina-Aldareguia, A. Makradi, L. Adam, I. Doghri, L. Noels, A study of composite laminates failure using an anisotropic gradient-enhanced damage mean-field homogenization model, Composite Structures, 126, 246–264, 2015. [less ▲]Detailed reference viewed: 31 (1 ULg) Interfaces in multi-material architectures fabricated by polyjet printingZorzetto, Laura ; Rink, Marta; Briatico Vangosa, Francesco et alConference (2016, September 07)Detailed reference viewed: 32 (3 ULg) Generalized Pascal triangle for binomial coefficients of words : an overviewStipulanti, Manon Conference (2016, September 07)We introduce a generalization of Pascal triangle based on binomial coefficients of finite words. These coefficients count the number of times a finite word appears as a subsequence of another finite word ... [more ▼]We introduce a generalization of Pascal triangle based on binomial coefficients of finite words. These coefficients count the number of times a finite word appears as a subsequence of another finite word. Similarly to the Sierpiński gasket that can be built as the limit set, for the Hausdorff distance, of a convergent sequence of normalized compact blocks extracted from Pascal triangle modulo 2, we describe and study the first properties of the subset of [0, 1] × [0, 1] associated with this extended Pascal triangle modulo a prime p. Then we create a new sequence from this extended Pascal triangle that counts, on each row of this triangle, the number of positive binomial coefficients. We study some properties of this sequences. To be precise, we investigate some properties regarding the regularity of the sequence. To extend our work, we construct a Pascal triangle using the Fibonacci representations of all the nonnegative integers and we define the corresponding sequence of which we study the regularity. This regularity is an extension of the classical k-regularity of sequences. [less ▲]Detailed reference viewed: 13 (5 ULg) Yes we can! Implementing digitization requests in AlmaRenaville, François ; Brownlie, Helen; Read, Simon et alConference (2016, September 06)Enabling patron digitization requests is one of those (new) exciting services that end users appreciate! Alma allows patrons and staff members to request the creation of a digital file for any physical or ... [more ▼]Enabling patron digitization requests is one of those (new) exciting services that end users appreciate! Alma allows patrons and staff members to request the creation of a digital file for any physical or electronic item. Alma digitization request workflow is configurable according to the library’s requirements, created via Alma or Primo, partial or full, limited to some user groups, limited in numbers, with or without approval process, digitized materials added to collections and made accessible to registered and/or guest users via Primo, etc. So Alma libraries can deal with a lot of different options to satisfy their patrons' needs. This session will present the development and launch of digital fulfillment from the perspective of 3 institutions (the University of Otago Library, the University of Liege Library, and the University of Sheffield Library) focusing on the strategic choices that were made, the implementation, and the final delivery of the services to their communities. [less ▲]Detailed reference viewed: 79 (16 ULg) Ultra-narrow superconducting junctions: electromigration to shed light on quantum point contactsBaumans, Xavier ; Cerbu, Dorin; Adami, Obaïd-Allah et alConference (2016, September 06)Superconducting nanowires have been, for years now, a topic of great interest due to their potential application in single photon detectors and in quantum computing circuits. In this context, it is of ... [more ▼]Superconducting nanowires have been, for years now, a topic of great interest due to their potential application in single photon detectors and in quantum computing circuits. In this context, it is of fundamental importance to better understand the undesired and harmful appearance of thermal and quantum fluctuations of the superconducting order parameter [1]-[3] as a function of the wire width. Although superconductors in the mesoscopic regime (i.e. size comparable to ξ and/or λ) have been explored both experimentally and theoretically in depth, the superconducting nanoworld (i.e. at scales of the fermi wavelength) has received much less attention. The lack of experimental results is in part due to the difficulty of sample fabrication, at dimensions beyond the limit reached by conventional lithographic techniques. A promising direction consists of controlling the local displacement of atom by an electron wind, a process known as electromigration (EM) [4] . This effect relies on the combination of local temperature rise and substantial current crowding at nanoconstrictions. While uncontrolled, EM is responsible for the breakdown of small electronic devices, it can be used in a controllable way to further decrease locally the cross section of the nanowire towards single atomic contacts. In this work, we explore in-situ controlled EM to fabricate nano-constrictions immersed in cryogenic environment. We demonstrate that a transition from thermally assisted phase slips (TAPS) to quantum phase slips (QPS) takes place when the effective cross section becomes smaller than ~ 150 nm 2 . In the regime dominated by QPS the nanowire loses completely its capacity to carry current without dissipation, even at the lowest possible temperature [5] . We also demonstrate that the bow-tie shaped constrictions exhibit a negative magnetoresistance at low magnetic fields [5] which can be attributed to the suppression of superconductivity in the contact leads [6] . Strikingly, the detrimental effect caused by the repeated EM can be healed by simply inverting the current direction. These findings reveal the strong potential of the proposed fabrication method to explore various fascinating superconducting phenomena in atomic-size constrictions. [less ▲]Detailed reference viewed: 17 (4 ULg) Are Christmas tree plantations a suitable habitat for farmland birds?Gailly, Robin ; Paquet, Jean-Yves; Titeux, Nicolas et alConference (2016, September 06)Over the last decade, nonfood perennial crops have been increasingly prevalent in European farming systems. Here, vegetation structure and crop management greatly differ from conventional crops and may ... [more ▼]Over the last decade, nonfood perennial crops have been increasingly prevalent in European farming systems. Here, vegetation structure and crop management greatly differ from conventional crops and may likely impact farmland birds. Impacts on birds have been examined for bioenergy agricultural systems, such as miscanthus plantations and short rotation willow coppice. In Europe, the extend of Christmas tree plantations (CTP) has recently increased dramatically in farmland but their impacts on farmland birds remains largely unknown. We examined the extent to which CTP in southern Belgium alter bird species assemblages compared to traditional farmland. The presence and abundance of birds were recorded twice during a breeding season in randomly selected sites located in farmland areas with and without CTP. Results show that the conversion of traditional farmland into CTP modifies bird species assemblages and locally increases bird diversity and density without inducing biotic homogenization. This observed pattern indicates that CTP might constitute an interesting alternative habitat for farmland birds. However bird presence or abundance may be confounding indicator of habitat quality because individuals may be attracted to low-quality habitats in human modified landscapes. The European Stonechat Saxicola rubicola was chosen as a model species to investigate the quality of CTP as a breeding habitat in more details. Habitat quality in CTP was assessed with measures of reproductive success and survival. These measures were compared with those collected in traditional farmland. Although vegetation structure, field management and nest placement are highly different between habitat types, our first results suggest that CTP are not of lesser quality than traditional farmland for the European Stonechat. [less ▲]Detailed reference viewed: 11 (6 ULg) Subsidence in the Sept Iles layered intrusion (Canada) revealed by anisotropy of magnetic susceptibilityBolle, Olivier ; Diot, Hervé; Fransen, William et alConference (2016, September 06)Detailed reference viewed: 15 (3 ULg) Internet Platforms for Education on SustainabilityPfennig, Andreas Conference (2016, September 05)One challenge in teaching sustainability results from the expertise being distributed in various universities. At the same time society would not require so many experts focused on sustainability that ... [more ▼]One challenge in teaching sustainability results from the expertise being distributed in various universities. At the same time society would not require so many experts focused on sustainability that corresponding purely sustainability-oriented curricula should be offered in a majority of universities. Thus sustainability aspects have to be integrated into existing curricula e.g. in chemical engineering studies. To offer sufficiently high-level courses or teaching content, one way is to share modules dealing with sustainability aspects. The idea to share teaching capabilities on a national or international level is not new, some examples are sustainicum.at, bioenergytrain.eu. While these approaches address the topic of sustainability with a relatively wide variety of facets, it is difficult to see, how a coherent picture can be obtained and transferred in education to students and the interested public. While this is so, already regarding the most basic element of the versatile toolbox of chemical engineering, namely setting up and solving simple balances, leads to significant insights and especially a fundamental understanding on the basic interplay of at least some of the major drivers. These are – besides increasing world population, which is the main driver – the increasing energy consumption, the limited land area for food and bioenergy production, the finite size even of the atmosphere leading to an increase in CO2 concentration and climate change, to name just a few. All of these aspects refer to limited resources for which balances can be set up and solved. The balances have the advantage that they are so simple that everybody can assess their validity and implications. The experience with working out a corresponding teaching module will be presented exemplarily. To facilitate delivering the aspects to students and the interested public the teaching material including a full manuscript and power-point slides have been worked out and are supplied at sustainicum.at. To allow easy access to the content of this teaching material also corresponding lectures have been recorded and are made publicly available through YouTube. The technical boundary conditions, which were found to be quite optimal as compared to other public lectures available on the internet, will be presented. The teaching material has in the past also been used for a variety of own presentations with the aim to deliver the basic understanding to an interested public, including public conference series or school classes. From these various experiences conclusions are drawn which will be presented. Introduction: One challenge in teaching sustainability results from the expertise being distributed in various universities. At the same time society would not require so many experts focused on sustainability that corresponding purely sustainability-oriented curricula should be offered in a majority of universities. Thus sustainability aspects have to be integrated into existing curricula e.g. in chemical engineering studies. To offer sufficiently high-level courses or teaching content, one way is to share modules dealing with sustainability aspects. The idea to share teaching capabilities on a national or international level is not new, some examples are sustainicum.at, bioenergytrain.eu. While these approaches address the topic of sustainability with a relatively wide variety of facets, it is difficult to see, how a coherent picture can be obtained and transferred in education to students and the interested public. Exemplary Topic: While this is so, already regarding the most basic element of the versatile toolbox of chemical engineering, namely setting up and solving simple balances, leads to significant insights and especially a fundamental understanding on the basic interplay of at least some of the major drivers. These are – besides increasing world population, which is the main driver – the increasing energy consumption, the limited land area for food and bioenergy production, the finite size even of the atmosphere leading to an increase in CO2 concentration and climate change, to name just a few. All of these aspects refer to limited resources for which balances can be set up and solved. The balances have the advantage that they are so simple that everybody can assess their validity and implications. The experience with working out a corresponding teaching module will be presented exemplarily. Results and Conclusions: To facilitate delivering the aspects to students and the interested public the teaching material including a full manuscript and power-point slides have been worked out and are supplied at sustainicum.at. To allow easy access to the content of this teaching material also corresponding lectures have been recorded and are made publicly available through YouTube. The technical boundary conditions, which were found to be quite optimal as compared to other public lectures available on the internet, will be presented. The teaching material has in the past also been used for a variety of own presentations with the aim to deliver the basic understanding to an interested public, including public conference series or school classes. From these various experiences conclusions are drawn which will be presented. [less ▲]Detailed reference viewed: 14 (1 ULg) Instability and abrupt changes in marine ice sheet behaviourBulthuis, Kevin ; Arnst, Maarten ; Pattyn, Frank et alConference (2016, September 05)The West Antarctic ice sheet (WAIS), whose bedrock is to a large extent below sea level, has been identified as a tipping element in Earth’s climate system because it could dramatically re- treat and ... [more ▼]The West Antarctic ice sheet (WAIS), whose bedrock is to a large extent below sea level, has been identified as a tipping element in Earth’s climate system because it could dramatically re- treat and cause important sea-level rise. Different mechanisms underlying instabilities of such marine ice sheets have been proposed in the literature, but the risk that these mechanisms could trigger an accelerated retreat of the WAIS is still an open question. In this oral communication, which results from the literature study that I carried out during this ongoing first year of my PhD, I will review two main mechanisms that can cause marine ice sheet instability. The first mechanism is the marine ice sheet instability explained by Weertman who hypothe- sizes that marine ice sheets grounded on bedrocks which deepen inland can be inherently unstable. I will focus my attention on the stability of the steady states of this nonlinear dyna- mical system, as well as on the critical values of the external forcing parameters responsible for abrupt changes in the system behaviour (critical transitions). I will review how geological data suggest that rapid ice sheet retreats explained by Weertman’s hypothesis occurred in Antarctica during the Pleistocene and the early Holocene. The recently observed accelerated ice loss of the Pine Island and Thwaites glaciers of the WAIS could also be considered as a consequence of this instability mechanism and could lead to an important contribution to sea-level rise in the future. The second mechanism that I will review is the binge-purge oscillation mechanism which could have caused the disintegration of the Laurentide ice sheet during the last glacial period. These oscillations could also explain future behaviour of the WAIS. Binge-purge oscillations are short periods of enhanced ice flow (purge phase) followed by periods of much slower flow (binge phase). These oscillations are usually explained by a thermal-gravitational instability which takes place when basal conditions change. I will focus my attention on the mathematical and physical conditions which can trigger this instability process, as well as on examples of such oscillations in the WAIS in the past. [less ▲]Detailed reference viewed: 25 (12 ULg) Imprinting superconducting vortex trajectories in a magnetic layerShaw, Gorky Conference (2016, September 05)We experimentally show that the principle of local polarization of a magnetic layer can be applied for imprinting, into a soft magnetic layer of permalloy (Py), the trajectory of vortices moving in a ... [more ▼]We experimentally show that the principle of local polarization of a magnetic layer can be applied for imprinting, into a soft magnetic layer of permalloy (Py), the trajectory of vortices moving in a superconducting film (Nb). In full analogy with a magnetic drawing board, vortices act as tiny magnetic scribers leaving a wake of polarized magnetic media in the Py layer. We have used the magneto-optical imaging technique to investigate the mutual interaction between superconducting vortices and ferromagnetic domains. In general, we observe that the flux propagation is delayed at the border of the magnetic layer. For thick Py layers, the stripe magnetic domain pattern guides the smooth flux penetration as well as the abrupt vortex avalanches in the Nb film. More interestingly, in thin Py layers without stripe domains, vortices leave clear imprints of locally polarized magnetic moments along their trajectories. Furthermore, the printings were found to be stable and could still be observed at room temperature, allowing for ex situ observation of the flux penetration in superconductors. We expect our findings to pave the way for further studies for optimizing magnetic recording of superconducting vortex trajectories. [less ▲]Detailed reference viewed: 14 (3 ULg) Facultative paedomorphosis in newts: A heterochrony promoting trophic niche differentiation at the intraspecific levelLejeune, Benjamin ; Lepoint, Gilles ; Sturaro, Nicolas et alConference (2016, September 05)Detailed reference viewed: 13 (2 ULg) Balanced words and related concepts: applications and complexity issuesCrama, Yves Conference (2016, September 05)In this talk, I present a few results and several questions about "regular" sequences of integers and related concepts, such as balanced words, partitions and covers of the integers by arithmetic ... [more ▼]In this talk, I present a few results and several questions about "regular" sequences of integers and related concepts, such as balanced words, partitions and covers of the integers by arithmetic sequences. Such concepts have been investigated in pure mathematics, but also naturally arise in a variety of application fields such as production planning, political science, or queueing theory. I briefly present some of these applications and explain how they motivate seemingly new questions relating, for instance, to the algorithmic complexity of regular partitions, or to the structure of balanced words. The presentation is based on joint work with Nadia Brauner and Vincent Jost (Grenoble). [less ▲]Detailed reference viewed: 16 (2 ULg) Phase Slips In Tunable Width Point Contacts Created By ElectromigrationSilhanek, Alejandro Conference (2016, September 05)Superconducting nanowires have been, for years now, a topic of great interest due to their potential application in single photon detectors and as interconnects in circuits proposed for quantum computing ... [more ▼]Superconducting nanowires have been, for years now, a topic of great interest due to their potential application in single photon detectors and as interconnects in circuits proposed for quantum computing. In this context, it is of fundamental importance to better understand the undesired and harmful appearance of thermal and quantum fluctuations of the superconducting order parameter as a function of the wire width. In this presentation, we explore in-situ controlled electromigration (EM) to fabricate nano-constrictions immersed in cryogenic environment. We demonstrate that a transition from thermally assisted phase slips (TAPS) to quantum phase slips (QPS) takes place when the effective cross section becomes smaller than ~150 nm^2. In the regime dominated by QPS the nanowire loses completely its capacity to carry current without dissipation, even at the lowest possible temperature. We also demonstrate that the bow-tie shaped constrictions exhibit a negative magnetoresistance at low magnetic fields which can be attributed to the suppression of superconductivity in the contact leads. Strikingly, the detrimental effect caused by the repeated EM can be healed by simply inverting the current direction. These findings reveal perspectives of the proposed fabrication method for exploring various fascinating superconducting phenomena in atomic size constrictions. [less ▲]Detailed reference viewed: 27 (2 ULg) Towards a data model for (inter)textual relationships. Connecting Ancient Egyptian texts and understanding scribal practicesPolis, Stéphane ; Razanajao, Vincent ; Sojic, Nathalie Conference (2016, September 05)The goal of this lecture is theory-oriented: we propose a conceptual data model that allows us to deal with complex textual relationships. It is empirically grounded in our experience of digital ... [more ▼]The goal of this lecture is theory-oriented: we propose a conceptual data model that allows us to deal with complex textual relationships. It is empirically grounded in our experience of digital annotation of Ancient Egyptian texts. This paper is initially born out of the practical need of annotating and linking together hundreds of textual witnesses in the framework of the Ramses project (Polis et al. 2013; Polis & Winand 2013), the aim of which is to build and publish online (http://ramses.ulg.ac.be) the first richly annotated corpus of Late Egyptian texts (c. 1350-900 BCE). [less ▲]Detailed reference viewed: 16 (1 ULg) New crystallographic data on several uranyl mineralsDal Bo, Fabrice ; Hatert, Frédéric ; Philippo, SimonConference (2016, September 04)Detailed reference viewed: 7 (1 ULg) Quantitative approaches to the classification of complex prepositions: Cross-linguistic multivariate analyses for English, Dutch, and FrenchBéchet, Christophe Conference (2016, September 03)Detailed reference viewed: 27 (3 ULg) Urban soils with a sideway glanceMeulemans, Germain Conference (2016, September 03)The soils of cities are becoming an important subject for the soil sciences, triggering revisions in their usual modes of research and concepts. One implication of this is the resort to the 'ecological ... [more ▼]The soils of cities are becoming an important subject for the soil sciences, triggering revisions in their usual modes of research and concepts. One implication of this is the resort to the 'ecological engineering' of soils, framed as a research in soil processes through the active making of soils from scratch. In this, several voices from inside the Soil sciences call for a move from descriptive research to open-ended experimentation. A similar move has also been called for in anthropology. Ingold, notably, suggests to revive the 'craft of anthropology' (2008), encouraging anthropologists to participate in the carrying on of life through craft and experimentation, rather than restraining to retrospective accounts of its unfolding dynamics. How, then, can turns towards making resonate between the practices of soil scientists and those of the anthropologists that attempt to study them? In this paper, I present a collaborative experiment between artists, anthropologists and soil scientists that was carried out in a series of residences near Paris between 2015 and 2016. The residential sessions consisted in a continuation and speculative exploration of the questions raised in both the soil sciences and anthropology in an experimental, creative way - addressing the intertwinement of human and soil becomings from direct engagement with them. The paper addresses how such experiments can be a research process, aimed at exploring the world 'with a sideway glance' (Ingold, 2008). The paper concludes with open questions on where anthropological investigation through art making might play a role in the future of disciplinarities. [less ▲]Detailed reference viewed: 11 (2 ULg) Co-producing evidence: Ethnographic inquiry of a "wild" search for causationDuysens, Fanny Conference (2016, September 03)Drawing on a multi-sited ethnography which explores the field of patients’ organizations (POs) concerned with genetic disorders within the Belgian context, this communication is interested in some ... [more ▼]Drawing on a multi-sited ethnography which explores the field of patients’ organizations (POs) concerned with genetic disorders within the Belgian context, this communication is interested in some knowledge-related collaboration between POs and scientific and medical experts, or “wild research” projects (Callon & Rabeharisoa, 2003). Especially, it examines an informant's narrative of the "wild" search for causation of the disorder by which his family is concerned and the inherent forms and modalities of knowledge production, circulation and validation. While STS scholars have traditionally seen POs as epistemic communities, they currently point out an increasing engagement in such novel forms of collaboration over the last decades. This leads to the emergence of a certain “evidence-based activism” (EBA) among POs, characterized by a growing articulation of credential and more “experiential” knowledge to define common epistemologies of the conditions they are concerned with. The springs of this articulation remain to be explored. Thus, the aim is to flesh out the recent concept of EBA, to empirically question what it covers, and how new biomedical knowledge is generated by “evidence activists”. Rather than provoking “radical openings in technoscientific practice”, our observations show a continuous co-production of knowledge taking place within POs engaged in EBA. So, this paper will take stock of these transformations and envisage the affordances and blind spots for STS of the use of new concepts such as EBA. [less ▲]Detailed reference viewed: 34 (9 ULg) Le potentiel des blogues et des réseaux numériques dans l'apprentissage d'une langue étrangèreVintila, Elena-Georgiana Conference (2016, September 02)We selected two French foreign language textbooks published in Romania under the Ministry of Education in 2004 and 2005 by the same publishing house and we will analyze the modality of presentation of ... [more ▼]We selected two French foreign language textbooks published in Romania under the Ministry of Education in 2004 and 2005 by the same publishing house and we will analyze the modality of presentation of grammar points offered by textbooks and selected blogs. For this analysis, we will focus on: the appearance of textbooks, respectively blogs, the presentation of the grammar point set analysis, types and number of exercises. In addition, we will try to see what socio-cultural values ​​are highlighted by the authors and how bloggers alter through publications. [less ▲]Detailed reference viewed: 18 (2 ULg) “That’s only statistics”:Recording PPPs in national accountsPiron, Damien Conference (2016, September 02)Detailed reference viewed: 16 (2 ULg) The influence of COMT on the neural substrates of short-term memory in normal agingManard, Marine ; Salmon, Eric ; Collette, Fabienne Conference (2016, September 02)Working memory dopaminergic modulation is generally expressed in healthy aging by an advantage for carriers of the Met allele at behavioral and brain activity levels. However, most tasks used did not ... [more ▼]Working memory dopaminergic modulation is generally expressed in healthy aging by an advantage for carriers of the Met allele at behavioral and brain activity levels. However, most tasks used did not allow to easily disentangle the contribution of maintenance and manipulation processes. We explored the effect of COMT genotype on the maintenance process using a Sternberg memory task varying the amount of information presented, in young and older homozygous carriers for the Val and Met alleles of the COMT gene. Although no clear behavioral difference was observed between groups, patterns of cerebral activity indicate difficulties for Met older individuals to maintain stable representations. These results will be discussed in terms of dopaminergic contribution to stability/flexibility of cognitive processes during aging. [less ▲]Detailed reference viewed: 34 (1 ULg) Impact of high-wheat bran diet on sows’ microbiota, performances and progeny’s growth and healthLeblois, Julie ; Bindelle, Jérôme ; Dehareng, Frédéric et alConference (2016, September 02)Finding alternatives to antimicrobial growth promoters is part of the goal of improving sustainability in pig production. Dietary fibres are considered as health-promoting substances acting on pigs’ ... [more ▼]Finding alternatives to antimicrobial growth promoters is part of the goal of improving sustainability in pig production. Dietary fibres are considered as health-promoting substances acting on pigs’ microbiota. This study aimed to investigate whether the enrichment of sows’ diet with high levels of wheat bran (WB) could impact the performances of sows and piglets’ health. Seven sows were fed a control diet (CON) and 8 sows a WB diet from day 43 of gestation (WB 240 g/kg DM) until the end of the lactation period (WB 140 g/kg DM). Diets were formulated to be iso-energetic and iso-nitrogenous by changing the proportions of some ingredients. Faeces were sampled at different time points (before treatment, during treatment: in gestation and lactation) to determine microbiota composition (sequencing with Illumina MiSeq). Milk was sampled weekly to determine lactose, fat and protein concentration by mid-infrared technology and IgA and IgG contents by ELISA. Before weaning (d26-27), piglets were euthanized, intestinal contents and tissues sampled for further analyses. Zootechnical performances of sows and piglets were recorded. Statistical analyses were performed using the SAS MIXED procedure and repeated measurements. Treatment never impacted piglets’ weight (P=0.51). Sows’ ingestion during the lactation period was comparable between both treatments until the last 4 days of lactation where the percentage of target ingestion was significantly (P<0.001) lower for the WB (66%) compared to the CON group (89%). No effect on sows’ backfat and weight changes was observed. An increased abundance of Lactobacillus spp. in feces of the WB group was observed in gestation before and after diet change (8.8% vs 15.1% of total bacteria). However, for the overall genera changes between treatments, it only seems to occur for minor groups of bacteria. Milk protein, fat, IgG and IgA were not affected by treatment, but a time-effect (P<0.001) was observed while treatment impacted (P<0.05) lactose content. In conclusion, sows’ performances were not affected by the high WB diet and more research on the piglets’ samples is foreseen. [less ▲]Detailed reference viewed: 28 (5 ULg) Integrating Science and Technology into Sports: A Case Study of Sports Innovations in BelgiumVan Oudheusden, Michiel ; Van Hoyweghen, IneConference (2016, September 01)This paper explores the dynamic interplay between sports and innovation policies, research and development processes, and science-driven sports practices in Wallonia and Flanders (Belgium). Here, as in ... [more ▼]This paper explores the dynamic interplay between sports and innovation policies, research and development processes, and science-driven sports practices in Wallonia and Flanders (Belgium). Here, as in other countries and regions, the aim of integrating science and technology into sports is now a leading sports policy principle and innovation strategy. Building on science and technology studies (STS) tools and methods (vision assessment, multi-site ethnography, foresight), the paper draws out the ethical, legal, and social issues (ELSI) induced by the use of new sciences and technologies in sports. These ELSI include the client-centered nature of sports science, which raises concerns about occupational control and athlete welfare, the uptake of genetic data in sports talent detection programs, and the challenges of coordinating "data-driven" and "intuitive" sports training approaches. It is argued that as sports are scientized and technologized, such ELSI demand to be addressed by sports innovators, governing bodies, and publics. By drawing critical attention to how sports are increasingly shaped by devices, data flows, and scientists, the paper states the case for bringing sports into STS and STS into sports. [less ▲]Detailed reference viewed: 17 (0 ULg) How to expand method by and for sensory: trials along and beside fieldworkVangeebergen, Thomas Conference (2016, September 01)In a research with sensory analysts and flavourists, I tried other ways of interview (e.g. people auto-confrontations to their own registered activity) and other mediums to relate to the ethnographical ... [more ▼]In a research with sensory analysts and flavourists, I tried other ways of interview (e.g. people auto-confrontations to their own registered activity) and other mediums to relate to the ethnographical work, as graphic novel or comics. [less ▲]Detailed reference viewed: 11 (2 ULg) Structural design considering damage within an XFEM-level set frameworkNoël, Lise ; Duysinx, Pierre ; Maute, KurtConference (2016, September)Detailed reference viewed: 31 (5 ULg) Fiber technology, rope-making, textiles and the Lochstäbe from the Aurignacian of the Swabian JuraConard, Nicholas; Rots, Veerle Conference (2016, September)Detailed reference viewed: 21 (1 ULg) Identification of bovine methicillin resistant staphylococci from Europe, Africa and North America by colony hybridization, PCR and antibiotic sensitivity.Ngassam Tchamba, Cyrille ; Thiry, Damien ; Bardiau, Marjorie et alConference (2016, September)Mastitis is the costliest pathology in dairy cattle and staphylococci are the most prevalent bacterial mastitis pathogens worldwide. Antimicrobial treatment of mastitis has led to the selection of ... [more ▼]Mastitis is the costliest pathology in dairy cattle and staphylococci are the most prevalent bacterial mastitis pathogens worldwide. Antimicrobial treatment of mastitis has led to the selection of resistant staphylococci, of which the Methicillin Resistant S. aureus (MRSA) are the most studied ones. Still, MR has also been described for non-aureus staphylococci (MRS) species. Bovine MRS(A) represent not only a problem in the treatment of mastitis, but also a potential hazard in public health via the inter-Staphylococcus transferability of the mobile “Staphylococcal Cassette Chromosome” (SCC) carrying the mec genes encoding MR and the zoonotic potential of some Staphylococcus species. The aim of this study is the comparison of genetic and phenotypic methods for the identification of MRS(A) isolated from bovine mastitis in European, African and North-American countries. A total of 1168 mastitis-associated staphylococci were isolated between 2005 and 2014 in Belgium, Italy, Switzerland, Senegal, Niger and Canada, and kept at -80°C until further use. Out of them, 867 isolates were identified to S. aureus while 301 isolates were non aureus staphylococci. All 1168 staphylococci were tested genetically by the dot blot hybridization assay on positively charged nylon membranes (Roche) after DNA extraction with 32P-radioactively labelled probes derived from the mecA and mecC genes and phenotypically by growth on “Chrom MRSA ID®” agar plates. Isolates positive at both or either tests were further studied by PCR targeting the same two genes and by the disk diffusion assay to oxacillin and cefoxitin. A total of 265 isolates (23%) were positive at both or either tests. Out of them, 27 S. aureus (10%) but no non-aureus (0%) tested positive both for DNA hybridization with the mecA probe and for growth on “Chrom MRSA ID®” plates. No isolate tested positive with the mecC probe. In addition, 32 S. aureus (12%) and 15 non aureus (6%) were positive with the mecA probe only and 169 S. aureus (64%) and 22 non aureus (8%) grew on “Chrom MRSA ID®” plates only. The S. aureus originate from Belgium (105), Italy (6), Canada (31), Senegal (38) and Niger (48) whereas the non-aureus originate from Belgium (25), Italy (1) and Niger (11). All of them are being tested with the PCR targeting the mecA gene and by the disk diffusion assay to oxacillin and cefoxitin. Most isolates (72%) grew on “Chrom MRSA ID®” plates only while few (18%) were positive to the hybridization with the mecA probe only. This high difference between the results of both tests could be explained by the weak specificity of phenotypic tests comparing to genetic tests. The others 10% of the isolates (S. aureus) which are positive with the two methods (dot blot hybridization and “Chrom MRSA ID®”) can be considered as MRSA mediated by the mecA gene. However, results of PCR and disk diffusion assay will confirm respectively the presence of mec genes and which of the two methods is the most suitable for identifying MRS from mastitis cases in cattle. Comparison of the results of phenotypic and genetic assays will indicate whether other variant(s) than mecA and mecC may be present in MRS. Further genetic and phenotypic studies are needed to (i) identify the non-aureus isolates to the species level; (ii) compare the MRS(A) isolated in the different countries by their biotypes, serotypes, lysotypes, and virulotypes, without forgetting their SCCmec and their clonal complex; and (iii) identify the mec gene variant present in hybridization-positive PCR-negative isolates, if any. [less ▲]Detailed reference viewed: 17 (0 ULg) Al-Maqrīzī, Ibn Ḥajar and the Man Who Pretended to Be the Sufyānī: An Insight into Source Criticism in the Late Mamlūk PeriodBauden, Frédéric Conference (2016, September)Detailed reference viewed: 52 (3 ULg) Effect of emulsification and whipping on the technological and structural particularities of fat: A comparative study between three distinct fatsPetrut, Raul Flaviu ; Anihouvi, P.P.; Blecker, Christophe et alConference (2016, September)Detailed reference viewed: 21 (3 ULg) Age-related differences in the dynamics of cortical excitability and cognitive inhibition during prolongedwakefulnessGaggioni, Giulia ; Chelllappa, S.; Ly, J. et alConference (2016, September)Detailed reference viewed: 22 (9 ULg) Enzymatic interesterification for the formulation of high quality zero trans fats from rapeseed oilGibon, V.; Closset, S.; Maes, J. et alConference (2016, September)Detailed reference viewed: 3 (0 ULg) Modifications de matériaux sous radiations spatiales: nouveaux dispositifs au laboratoire de LiègeChene, Grégoire ; Rossi, Laurence ; Fleury-Frenette, Karl et alConference (2016, September)Detailed reference viewed: 19 (4 ULg) Cannabis, alcohol and delinquency in adolescents and emerging adults: Specific process according to developmental stage?Schmits, Emilie ; Born, Michel ; Glowacz, Fabienne Conference (2016, September)Detailed reference viewed: 15 (4 ULg) Flocculation properties of the bacterial exopolysaccharide FucoPolAraújo, Diana; Reis, Patricia; Marques, Anna et alConference (2016, September)Detailed reference viewed: 10 (1 ULg) Heart Team Liege - Session Video LinkPIERARD, Luc ; vahanian, Alec; LANCELLOTTI, Patrizio et alConference (2016, September)Detailed reference viewed: 39 (1 ULg) Epidemiology and Molecular Variability of little cherry virus in BelgiumTahzima, Rachid; Peusens, Gertie; Belïen, Tim et alConference (2016, September)Detailed reference viewed: 10 (0 ULg) Production of word stress by French speaking CLIL and non-CLIL learners of DutchHiligsmann, Philippe; Rasier, Laurent ; Degrave, PaulineConference (2016, September)Detailed reference viewed: 24 (3 ULg) Nonlinear vibration analysis of the SmallSat spacecraft: From identification to designDetroux, Thibaut ; Noël, Jean-Philippe ; Masset, Luc et alConference (2016, September)The objective of the present contribution is to introduce nonlinear experimental and numerical tools and methods applicable to real-life structures. The study is illustrated using the SmallSat spacecraft ... [more ▼]The objective of the present contribution is to introduce nonlinear experimental and numerical tools and methods applicable to real-life structures. The study is illustrated using the SmallSat spacecraft developed by Airbus Defence and Space, which possesses several localized nonlinearities. The computation of nonlinear normal modes and bifurcations reveals that the satellite possesses complex dynamics including modal interactions, quasiperiodic oscillations and isolated resonances. [less ▲]Detailed reference viewed: 23 (1 ULg) Identification of bovine and porcine colistin-resistant mcr1-positive Escherichia coli.Mainil, Jacques ; Muylaert, Adeline ; Saulmont, Marc et alConference (2016, September)OBJECTIVE Polymyxins, especially colistin, have been used for years in veterinary medicine and were rediscovered a few years ago as last resort antibiotics in human medicine against multi-resistant Gram ... [more ▼]OBJECTIVE Polymyxins, especially colistin, have been used for years in veterinary medicine and were rediscovered a few years ago as last resort antibiotics in human medicine against multi-resistant Gram negative bacterial pathogens. For years, only chromosome-mediated resistance to colistin was identified as a consequence of mutation(s) in lipid A-encoding genes. Recently, however, a plasmid-located gene (mcr1) was identified in Gram-negative enterobacteria and has since been found by PCR in several, but not all, bovine, human, porcine and poultry colistin-resistant Escherichia coli (Liu YY et al. Lancet Infect Dis, 2016, 16(2), 161-168; Nordmann P and Poirel L. Clin Microbiol Infect, 2016, 22, 398-400 ; Schwarz S and Johnson AP. J Antimicrob Chemother, 2016, in press, doi: 10.1093/jac/dkw274). The purpose of this study was to compare phenotypic and genetic for the detection of resistance to colistin and of the mcr1 gene in a collection of Escherichia coli isolated from different animal species and from humans. METHODS More than 3000 E. coli isolates from cattle, pigs, dogs, cats, horses, rabbits, chickens ducks and humans were tested for resistance to colistin by growing them on agar plates with 1g/ml of colistin. The Minimal Inhibitory Concentrations (MIC) of and the presence of the mcr1 gene in all growing isolates were determined using the E test® and colony hybridization assay with a mcr1 specific gene probe, respectively. The probe-positive isolates were further tested with the mcr1 gene specific PCR. RESULTS A total of 410 E. coli isolated grew on 1g/ml colistin-containing agar plates. The majority of isolates grew well, but several grew sparsely with only few isolated colonies. As determined by the E test®, MIC of 273 isolates (67%) was 1g/ml of colistin and higher; conversely, MIC of 137 isolates (33%) was lower than 1g/ml of colistin. Of those 410 E. coli isolates, 34 from pigs and bovines (9% of isolates growing on colistin-containing agar plates; 25% of isolates with MIC higher than 1g/ml) hybridized with the mcr1 gene-derived probe: 5 from pigs and 11 from bovines gave black spots (including five from the same calf), while 18 from pigs and one from bovine gave grey spots. All but one pig isolate had a MIC between 1.5 and 16 g/ml of colistin. Fifteen “black spot” probe-positive isolates tested positive with the mcr1 gene specific PCR as did 3 porcine “grey spot” probe-positive isolates, while the remaining 16 isolates repeatedly tested negative even after lowering the annealing temperature. CONCLUSION This study confirms that (i) the results of phenotypic assays for the detection of colistin resistance can not be always trusted; (ii) the mcr1 gene is not the only one mechanism of resistance to colistin; (iii) mcr1 variants may exist that can not be detected by the classical PCR. Phenotypic assays like growth on colistin-containing agar plates can still represent a first base screening assay, although the MIC determination using the E test® confirms a >1g/ml MIC for only 2 out of 3 growing isolates. Presence of mcr1 gene and putative variants (like the most recently described mcr2 gene; Xavier BB et al., Eurosurveillance, 21, 7 July 2016) in all probe-positive isolates will be confirmed after Whole Genome Sequencing that will also allow comparing the mcr1-positive plasmids and isolates from pigs and cattle to similar human E. coli isolates. Further studies should also be performed to identify the colistin resistance mechanism in mec-negative isolates. [less ▲]Detailed reference viewed: 24 (0 ULg) Changes in crop yields, soil organic carbon and soil nitrogen content under climate change and variable management practices"Dumont, Benjamin ; Basso, Bruno; Shcherbak, Iurii et alConference (2016, September)Detailed reference viewed: 29 (3 ULg) There is more to life than subsistence: use-wear and residue analyses on pre-Still Bay stone tools at SibuduRots, Veerle ; Lentfer, Carol ; Schmid, Viola et alConference (2016, September)Detailed reference viewed: 11 (1 ULg) Creating undocumented EU migrants through welfare: The case of BelgiumLafleur, Jean-Michel ; Mescoli, Elsa Conference (2016, September)In the dual context of increased Central and Eastern European migration and of the global financial and economic crisis, several Northern European Member States have implemented (or debated) reforms of ... [more ▼]In the dual context of increased Central and Eastern European migration and of the global financial and economic crisis, several Northern European Member States have implemented (or debated) reforms of their welfare regimes to restrict access to migrants coming from other EU Member States. As the debates on the so-called “welfare tourism” are intensifying in different parts of the EU, we can observe a growing trend among Member States to use welfare policies as instruments to limit the mobility of certain EU migrants. This stance is best illustrated with Prime Minister Cameron’s demand for four-year ban on EU migrants claiming in-work benefits. In Belgium, too, EU citizens have been particularly affected by this adverse context as the Migration Office (Office des Etrangers) has intensified controls against EU residents receiving welfare benefits. With this policy, authorities have been using a restrictive interpretation of the European Directive 2004/38 that allows Member States to remove residence permits from EU citizens who represent an “unreasonable burden on state finances”. As a consequence, the number of EU citizens expelled from Belgium on a yearly basis has jumped from 343 to 2,042 between 2010 and 2014. In this paper, we propose to focus on those EU citizens who see their freedom of circulation in the EU restricted after claiming social protection in their country of residence. Relying on fieldwork conducted with Italian and Romanian migrants who experienced the removal of their residence permit, we discuss the different resilience strategies of those EU citizens faced with the legal obligation to leave: such strategies include returning to the homeland, refusing to leave, mobilizing the support of migrant organizations, introducing individual appeals, and seeking to regularize their administrative status. In particular, we shall focus on the experience of EU migrants who have decided to stay in Belgium and experience the status of an undocumented EU migrant. This peculiarity of this status is visible in three respects: 1) expulsion is not enforced by local authorities, 2) migrants continue to be able to circulate between their homeland and the country where they no longer have a residence permit, and 3) they have a possibility to regularize their status if they can demonstrate to municipal authorities that they no longer represent “a burden” on Belgium’s public finances. Overall, confronting our data to the rich literature on undocumented third country nationals, we discuss the limits of EU citizenship as experienced by those who are denied the right to free movement. This paper relies primarily on multi-sited ethnographic fieldwork (in progress) conducted with Italian and Romanian migrants in Brussels and with individuals of the same nationality who decided to leave Belgium and return to their home country after the removal of their residence permit. Additional fieldwork includes semi-directed interviews with civil society organizations, trade unions, and consular authorities. The data collection process started in May 2014 and is expected to be finished in May 2016. [less ▲]Detailed reference viewed: 78 (9 ULg) Cancer du canal anal: identification de deux sous-types distinctsHerfs, Michael Conference (2016, September)Detailed reference viewed: 16 (0 ULg) Presentation of germplasm Health Unit-GemblouxMassart, Sébastien Conference (2016, September)Detailed reference viewed: 11 (1 ULg) Decihering LIP2 and POX2 promoter regulation for high yield recombinant proteins production in the yeast Yarrowia lipolyticaFickers, Patrick Conference (2016, September)Detailed reference viewed: 10 (3 ULg) Post Hirnantian (latest Ordovician-Early Silurian) environments in Ethiopia. First evidence from sedimentology and palynologyBussert, R.; Brocke, R.; Steemans, Philippe Conference (2016, September)Detailed reference viewed: 8 (0 ULg) Comparing conventional excellence: moral and technical features of "good research"Charlier, Nathan Conference (2016, September)During a stay at Lancaster University, I was struck to discover how the institutional branding relied on the rhetoric of excellence. Several flags scattered over the campus are displaying statements such ... [more ▼]During a stay at Lancaster University, I was struck to discover how the institutional branding relied on the rhetoric of excellence. Several flags scattered over the campus are displaying statements such as: "our physicists helped discover the Higgs boson particle", "Lancaster University is ranked among the top 10 universities in the UK", "our volcanologists made the first observation of a rare type of lava", etc. These quotes convey technologies such as rankings, but also moral and epistemological aspects regarding the role and status of scientific knowledge. This fostered my reflection regarding the fieldwork I made in different research institutions located in Belgium: while academic excellence is not at the core of their branding per se, it is indeed a key issue for many actors concerned with research governance. My paper proposes to map the different ways to frame the notion of excellence in four institutions: two large biotech research centres and two universities in Flanders and Wallonia. It relies on 25 semi-structured interviews with tenured academics involved in their institution's research management. The paper will compare how "good research" is valued in different settings: what counts when one evaluates the "excellence" of a scientific production/career? To which technologies, indicators and to which "moral principles" are interviewees referring to when they discuss excellence? How do they engage in criticizing certain framings and praise others? Eligible for the rhetoric or comparative panel, my contribution will present four distinct institutional conventions that govern research practices and sorts the good scientist from the bad. [less ▲]Detailed reference viewed: 9 (1 ULg) Binary Phase Behavior of Saturated Triacylglycerols containing Stearic and Palmitic AcidBhaggan, Krishnadath ; Smith, K.W.; Blecker, Christophe et alConference (2016, September)Detailed reference viewed: 4 (0 ULg) Crystallization and morphologies of waxes in rice bran oilDiem Doan, Chi; Patel, Ashok R.; Danthine, Sabine et alConference (2016, September)Detailed reference viewed: 9 (0 ULg) Clinically relevant optical properties of three types of intraocular lensesGatinel, Damien; Loicq, Jerôme Conference (2016, September)Purpose: To experimentally compare the optical performance of three types of hydrophobic intraocular lenses (IOLs): extended depth of focus (TECNIS Symfony), bifocal (TECNIS ZMB00), and trifocal ... [more ▼]Purpose: To experimentally compare the optical performance of three types of hydrophobic intraocular lenses (IOLs): extended depth of focus (TECNIS Symfony), bifocal (TECNIS ZMB00), and trifocal (FineVision GFree). Setting: Rothschild Foundation Paris, France - Liege Space Center Liège, Belgique Methods: Surface topography was analyzed by optical microscopy. Modulation transfer function (MTF) and spherical aberrations were determined on optical bench for variable pupil apertures and with two cornea models (0 µm and +0.28 µm). United States Air Force target imaging was analyzed for different focal points (near, intermediate, and far). Point spread function (PSF) and halos were quantified and compared. Results: All lenses presented step-like optic topography. For a pupil size of = 3 mm, distinctive MTF peaks were observed for all lenses: two peaks for the extended depth of focus and bifocal lenses with +1.75 and +4.00 diopters (D) addition, respectively, and three peaks for the trifocal lens with +1.75 and +3.50 addition for intermediate and near vision, respectively. The extended depth of focus and bifocal lens had slightly higher MTF at best focus with the +0.28 µm cornea model than with the 0 µm model, whereas the trifocal lens was likely to be more independent of the corneal spherical aberrations. Conclusions: Each lens appears to rely on light diffraction for optical performance, presenting halos with comparable intensities. For small pupil apertures, the MTF peaks for the far and intermediate focal distances of the trifocal and extended depth of focus lenses overlap, but the trifocal lens presented an additional MTF peak for the near focal points. [less ▲]Detailed reference viewed: 13 (0 ULg) Wood hydrolysates as feedstocks for Chlorella growth and fatty acid productionMiazek, Krystian ; Goffin, Dorothée ; Richel, Aurore Conference (2016, September)Detailed reference viewed: 20 (0 ULg)