References of "Unpublished conference/Abstract"      in Complete repository Arts & humanities   Archaeology   Art & art history   Classical & oriental studies   History   Languages &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 301 to 400 of 18604     1 2 3 4 5 6 7 8 9     Fluid responsiveness and the Frank-Starling mechanism: a theoretical study with a multiscale model of the cardiovascular systemKosta, Sarah ; Pironet, Antoine ; Negroni, Jorge et alConference (2016, September 27)Detailed reference viewed: 33 (8 ULg) Genomics and ecological adaptation: metal hyperaccumulation in Arabidopsis halleriHanikenne, Marc Conference (2016, September 27)Detailed reference viewed: 30 (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: 40 (2 ULg) Laboratory diagnosis of syphilisHUYNEN, Pascale Conference (2016, September 26)Detailed reference viewed: 8 (0 ULg) Relectures de La Misère du monde: Bourdieu, Sartre, EnzensbergerCormann, Grégory Conference (2016, September 26)Detailed reference viewed: 19 (1 ULg) Groundwater flow and saltwater intrusion modelling in the Continental Terminal (CT) aquifer near the Saloum inverse estuary in SenegalFaye, Serigne; Ndeye, Maguette Dieng; Orban, Philippe et alConference (2016, September 26)The Saloum River hypersaline estuary (Senegal) is an ‘inverse estuary’ showing a salinity increasing from the river mouth towards inland. This salinization process is mainly driven by a net loss of ... [more ▼]The Saloum River hypersaline estuary (Senegal) is an ‘inverse estuary’ showing a salinity increasing from the river mouth towards inland. This salinization process is mainly driven by a net loss of freshwater due to intense evaporation. In this context, interactions between the river and the surrounding aquifer of the Continental Terminal (CT) may lead to local and progressive salinization of this groundwater main resource for water supply. Our study, based on available data and new measured data in 2012 and 2013, is focused on the southern part of the Saloum basin. It confirms that the groundwater resource is threatened by local saltwater intrusions in the vicinity of the Saloum River and along the western coastal part of the aquifer. For a long term water resources management, it is thus essential to predict the future evolution of this process in a context of increasing groundwater pumping rate together with climate variability and changes. A groundwater flow model is developed using MODFLOW. Starting from a conceptual steady-state situation corresponding to the CT aquifer state in 1973 before development of pumping, a transient calibration of the groundwater flow model is performed on data from 1974 to 2012. Despite the low number of measured data, the model can be considered as the current best assessment tool for future predictions. Using the particle tracking technique (MODPATH), a first assessment of the saltwater intrusions in the aquifer is simulated (neglecting the density effect on the hydraulic conductivity) confirming the measured data. Results, for an increased pumping of 20% in 2050 combined with different climatic scenarios, are useful to assess how the saltwater intrusions will evolve in the next years. [less ▲]Detailed reference viewed: 15 (1 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: 35 (14 ULg) Un morso di più: ecologia del cannibalismo in Salamandra salamandraMelotto, Andrea; Manenti, Raoul; Ficetola, Francesco et alConference (2016, September 23)Detailed reference viewed: 17 (0 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: 69 (10 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: 18 (1 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: 32 (9 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) Phosphate-based composite electrodes for Li/Na-ion batteries: upscalable solution syntheses with in-situ solid carbon additionVertruyen, Bénédicte ; Brisbois, Magali; Eshraghi, Nicolas et alConference (2016, September 22)Since the success story of lithium iron phosphate, other phosphate-based compounds have attracted a lot of interest as promising candidates for positive electrodes in lithium-ion or sodium-ion batteries ... [more ▼]Since the success story of lithium iron phosphate, other phosphate-based compounds have attracted a lot of interest as promising candidates for positive electrodes in lithium-ion or sodium-ion batteries. Their electronic conductivity usually has to be improved through the preparation of composite powders ensuring intimate contact between the active material and conductive carbon. We report on the one-step synthesis of composite precursors using spray-drying or hydrothermal synthesis routes, two techniques which offer easy scaling-up of production. We show that addition of a solid carbon source (carbon black or carbon nanotubes) into the solution has a strong influence on the powder microstructure and is very effective in improving the battery cycling performance, taking our recent results on phosphates [Fex(PO4)(OH)y.zH2O)] and fluorophosphates [Na2FePO4F, Na3V2(PO4)2F3] as examples. We also compare this approach with the addition of the carbon source as a soluble precursor (such as ascorbic acid or citric acid) where the in situ formation of carbon is achieved by a heat treatment in inert atmosphere (typically argon). [less ▲]Detailed reference viewed: 59 (7 ULg) Propriétés multifractales de la divergence de séries d’ondelettesEsser, Céline Conference (2016, September 22)Dans cet exposé, nous nous intéressons à la divergence ponctuelle de séries d'ondelettes dans un espace de Besov donné. Nous obtenons une borne supérieure pour la dimension de Hausdorff de l'ensemble des ... [more ▼]Dans cet exposé, nous nous intéressons à la divergence ponctuelle de séries d'ondelettes dans un espace de Besov donné. Nous obtenons une borne supérieure pour la dimension de Hausdorff de l'ensemble des points ayant un taux de divergence donné, et nous montrons que cette borne est optimale en utilisant les notions de résidualité et de prévalence. [less ▲]Detailed reference viewed: 8 (2 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: 14 (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: 117 (2 ULg) Die Familie von Medem. Zur Verbindung von Bildung, Literatur und Politik in KurlandLeyh, Valérie Conference (2016, September 21)Detailed reference viewed: 16 (0 ULg) The role of meetings in building modern organisational governance systems - outlining a sociological approach to meetingsThunus, Sophie Conference (2016, September 21)By relying on empirical and micro level analyses of the implementation of a Belgian reform of mental healthcare delivery, this paper shows that inter-organisational and interinstitutional meetings might ... [more ▼]By relying on empirical and micro level analyses of the implementation of a Belgian reform of mental healthcare delivery, this paper shows that inter-organisational and interinstitutional meetings might be conceived as key sites for the realisation of public policy objectives; i.e. sites where both the meaning of policy objectives and the social systems through which they are enacted are (re)defined. This paper is based on a case study on the implementation process of the ongoing Belgian reform of mental healthcare delivery, called “Reform 107”. Reform 107 is designed to shift mental healthcare organisation from the model of residential psychiatry, which is centred on medical hospital care, to community psychiatry that implies, instead, psychosocial home and/or ambulatory care. Policymakers conceived this shift through the development of local mental healthcare networks, which are defined as concrete partnerships between local, residential and ambulatory care providers and social and employment public services. The first stage in the implementation process consisted in four-year exploratory projects through which local actors were expected to refine the community care model proposed by policymakers. By asking local actors to participate in the adaptation of the model to local realities, policymakers intended to improve their own knowledge of local mental healthcare systems on the one hand, and to interest local actors in a reform that challenges their institutional interests on the other. Our analyses of the implementation of Reform 107 focused on three local exploratory projects and their monitoring by federal public health authorities. The empirical material was collected through semi-structured interviews (N=62) with policymakers and local actors, direct observations of the meetings between local mental health practitioners responsible for the reform’s implementation (N=65) and documentary analyses, including policy and (local) organisational documents. This material was first analysed by relying on a sociological frame of analysis based on the French sociology of organisations (Friedberg, 1997) and the interactionist sociology (Abbott, 2005; Bucher & Strauss, 1961; Corbin & Strauss, 2008). The resulting sociological account (Thunus, 2015) stressed that local models of governance, power struggles as well as professional knowledge significantly impacted on the development of mental healthcare networks. It also highlighted the use of new techniques by federal public health authorities to manage the reform implementation. Those techniques, including the multiplication of meetings with local actors, direct coaching of local projects’ leaders as well as training of front-line mental health professionals, were conceived as means to oppose strategies of resistance usually enacted by psychiatric hospitals (S Thunus & Schoenaers, 2012). This paper offers to refine this analysis by focusing on the specific role played by meetings in policy implementation, based on a conception of “the practice of policy-making”(Richard Freeman, Griggs, & Boaz, 2011). It draws on the observation that, though researches on policy implementation increasingly evoke meetings as part of the policy process, they do not properly address the role played by meeting in influencing, orienting and possibly (re)defining policy reforms. Indeed, following the recognition of the need for dealing with complex and uncertain problems, or wicked problems (Roberts, 2000), by relying on procedural policy instruments (Howlett, 2000) and collaborative governance (Emerson, Nabatchi, & Balogh, 2011), numerous researches focused on policy networks, hybrid forums (Callon, Lascoumes, & Barthes, 2001) and special committees whose activities involve meetings. However, by considering meetings as a part of/a tool for larger processes as problems solving, crisis resolution or decision-making, those researches made them unproblematic means to achieve predefined and external objectives. The problems resulting from a “meetings as a tool approach” (Schwartzman, 1989) are twofold. On the one hand, it seems to ignore that, by bringing different and specialised expertise together, meetings induce social, cognitive and technical challenges. Those challenges, including the sharing of specialised knowledge and harsh negotiations between actors defending institutional interests and professional jurisdictions, make meetings conflicting and problematic arenas (Cohen, March, & Olsen, 1972). On the other, when conceived as rational means to reach external objectives, meetings often appear as disappointing and pointless. Based on this observation, Schwartzman (1989) proposed to stop seeing meeting as part of larger processes as decision-making (as a tool), to focus on what meetings actually do to the organisation or social context in which they take place (i.e. to consider meetings as a topic). By drawing on Schwartzman’s invitation to make meetings a research topic, we propose to ask the question of what inter-organisational and interinstitutional meetings actually did to the Belgian mental health care reform. We suggest addressing that question by relying on a conception of policy-making as a practice of a special kind (R Freeman, Griggs, & Boaz, 2011). This conception insists on the role played by policy practices as meeting and talks in determining policy objectives and creating groups supporting them. Accordingly, we will focus on social actions and interactions unfolding through meetings and talks, to see how they use and produce knowledge, instruments and relationships both embodying and reshaping their environment. Finally, by inviting us to bracket the explicit objectives of the observed meetings (e.g. providing policymakers with an operational definition of care functions included in the proposed community model), this approach will enable us to see what inter-organisational and interinstitutional meetings actually do to policy reforms. That is, generating performances (Goffman, 1959) supporting collective enactments of new social and professional roles and artefacts that (re) constitute the meaning of the reform and the associated social system. Viewing meeting as a concrete policy practice thus helps to stress that they contribute to durable and deep change in their social environment, precisely by generating talks that largely exceed/displace their explicit mandate. [less ▲]Detailed reference viewed: 17 (1 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: 98 (1 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: 31 (10 ULg) Stretching the ecosystem service concept for application in real world situationsBoeraeve, Fanny ; Jacobs, Sander; Dendoncker, Nicolas et alConference (2016, September 19)Detailed reference viewed: 13 (0 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: 18 (5 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) Cdk1 is essential for long-term maintenance of neural stem cells in the postnatal hippocampusVandenbosch, Renaud Conference (2016, September 16)Detailed reference viewed: 17 (1 ULg) "La théorie de l'acte mental : un problème méthodologique entre philosophie, psychologie et histoire de la psychologie, Université de GenèveBoccaccini, Federico Conference (2016, September 16)Detailed reference viewed: 11 (0 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: 27 (3 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: 10 (2 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: 20 (0 ULg) IntroductionMasson, Christophe Conference (2016, September 15)Detailed reference viewed: 12 (0 ULg) Semi-continuous fermentation of a thermotolerant and high acetic acid producing Acetobacter pasteurianus bacteriumMounir, Majid ; Thonart, Philippe; Ismaili Alaoui, Mustapha et alConference (2016, September 14)Among 63 strains isolated from fruits and homemade vinegars from different ecosystems of Morocco, a thermotolerant bacterium with high production of acetic acid was selected and evaluated for its ability ... [more ▼]Among 63 strains isolated from fruits and homemade vinegars from different ecosystems of Morocco, a thermotolerant bacterium with high production of acetic acid was selected and evaluated for its ability to perform efficient acetous fermentation at high temperature in a bioreactor. CV01 strain, isolated from cactus (Opuntia ficus-indica), was considered to be an Acetobacter pasteurianus sp. according to phylogenetic study based on 16s rDNA gene sequence analysis. An optimal culture medium containing initial concentrations of acetic acid and ethanol of 1% (v/v) and 4% (v/v), respectively, was used. The growth kinetics of this isolate were monitored in ﬂasks and compared with those of the wild type LMG 1625 mesophilic strain and the thermoresistant Acetobacter senegalensis reference strain. The CV01 strain exhibited abundant growth along with high amount of produced acetic acid at high temperature (41°C). Subsequently, a 20-L stirred tank bioreactor was used to assess thermotolerance and acidoresistance properties of the selected strain during semi-continuous acetic acid fermentation at 38°C. Interestingly, a total amount of 13.4% (w/v) acetic acid was yielded at the end of fermentation. Moreover, this bacterium could produce during the same fermentation process a final concentration of 11.2 g/L gluconic acid, a sensory quality indicator in vinegar production. Finally, the enzymatic study showed that CV01 strain exhibited high ADH and ALDH enzyme activity at 38°C compared with the mesophilic reference strain LMG 1632, which was signiﬁcantly susceptible to thermal inactivation. [less ▲]Detailed reference viewed: 23 (1 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: 22 (4 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: 74 (3 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: 64 (5 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: 41 (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: 27 (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: 48 (7 ULg) Methodik zur schnellen Bewertung von Syntheserouten auf Basis von ExergiebilanzenFrenzel, Philipp; Pfennig, Andreas Conference (2016, September 13)Heutige chemische Produkte basieren fast ausschließlich auf erdölbasierten Rohstoffen. Aufgrund weltweiter Bemühungen, die Abhängigkeit von fossilen Rohstoffen zu reduzieren, wird in den letzten Jahren ... [more ▼]Heutige chemische Produkte basieren fast ausschließlich auf erdölbasierten Rohstoffen. Aufgrund weltweiter Bemühungen, die Abhängigkeit von fossilen Rohstoffen zu reduzieren, wird in den letzten Jahren verstärkt die Nutzung alternativer Kohlenstoffquellen wie Biomasse oder CO2 erforscht. Die alternativen Kohlenstoffquellen unterscheiden sich hinsichtlich ihrer Zusammensetzung und Stoffeigenschaften teilweise deutlich von fossilen Rohstoffen. Aus diesem Grund müssen Syntheserouten und darauf aufbauende Prozesse neu entwickelt werden. Da zum einen sehr viele Syntheserouten prinzipiell denkbar sind und zum anderen die Entwicklung der entsprechenden Prozesse aufwendig ist, wird eine Möglichkeit benötigt, begrenzte Entwicklungsressourcen sinnvoll zu steuern. Dazu sollte bereits in einem frühen Entwicklungsstadium ein quantitativer Vergleich der Syntheserouten erfolgen, um diejenigen zu identifizieren, die das größte wirtschaftliche Potential versprechen. In diesem Vortrag wird eine Methodik vorgestellt, um eine schnelle erste, auf Exergie basierte Bewertung des wirtschaftlichen Potentials einer Syntheseroute bereits in einem frühen Entwicklungsstadium durchzuführen, in dem nur wenige Informationen vorliegen. Die Idee der Methodik ist, Syntheserouten in standardisierten Prozessen abzubilden, wodurch eine automatisierte Auswertung und somit ein schnelles Screening möglich wird. Die standardisierten Prozesse umfassen sowohl den Einfluss der Reaktion durch Abbildung der Reaktionsbedingungen, Stöchiometrie, Umsatz und Selektivität als auch die Auswirkungen der Trennaufgabe. Ebenso berücksichtigt wird die Rückführung von Lösungsmitteln und ggf. nicht umgesetzten Edukten. Als zentrale Bewertungsgröße zur Abschätzung des wirtschaftlichen Potentials wird eine Kombination aus Exergie- und Rohstoffeinsatz herangezogen. Der Vorteil von Exergiebilanzen gegenüber Energiebilanzen ist, dass die Produktion von Entropie berücksichtigt wird und so die Auswirkungen einzelner Prozessschritte untersucht und zwischen verschiedenen Energieformen unterschieden werden kann. Durch Berechnung der Exergieverluste, also der Verluste von Exergie aufgrund von Entropieerzeugung in den Prozessen, ergibt sich ein quantitativer Vergleich verschiedener Syntheserouten. [less ▲]Detailed reference viewed: 10 (0 ULg) Modelling the mortality of Hylotrupes bajulus (L.) larvae exposed to anoxic treatment for disinfestation of wooden art objectsde Streel, Géraud; Henin, Jean-Marc; Bogaert, Patrick et alConference (2016, September 13)Experiments were conducted to quantify the effect of several variables on the mortality of insects exposed to an anoxic treatment in order to generate a model linking mortality to these variables. This ... [more ▼]Experiments were conducted to quantify the effect of several variables on the mortality of insects exposed to an anoxic treatment in order to generate a model linking mortality to these variables. This study aims to explore the possible interest of using such a model to determine the characteristics of treatment (especially duration) needed to guarantee insect mortality with a given level of probability. Trials were performed on Hylotrupes bajulus larvae, which is a widespread species known for its high tolerance to anoxic conditions. The studied variables are the initial mass of the larvae, the treatment temperature (21, 30 and 40 °C), the treatment duration (four durations for each temperature tested) and whether the larva is held in wood or in a petri dish (directly exposed to anoxic atmosphere) during the experiment. It was found that, while the last variable is not correlated with mortality, treatment duration and temperature are significantly and positively correlated with it. Larvae with higher body mass were also shown to have a better resistance to the treatment. Based on these results, a model including insect initial mass, treatment temperature and duration, together with the interaction between these two variables, was determined. This relatively simple model appeared to be a useful tool in overcoming the difficulty in defining the modalities for anoxic treatment in order to reach a given level of mortality. [less ▲]Detailed reference viewed: 11 (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: 37 (12 ULg) How spending ten years in Raymond Lemaire's archive changed my vision on heritage conservationHoubart, Claudine Conference (2016, September 12)Detailed reference viewed: 21 (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: 103 (5 ULg) Random subspace with trees for feature selection under memory constraintsSutera, Antonio ; Châtel, Célia; Louppe, Gilles et alConference (2016, September 12)Detailed reference viewed: 48 (8 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: 21 (3 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: 29 (5 ULg) Precision synthesis of poly(ionic liquid)s in aqueous mediaCordella, Daniela ; Jérôme, Christine ; Detrembleur, Christophe Conference (2016, September 12)Detailed reference viewed: 12 (4 ULg) Reversible TAD chemistry as a convenient tool for the design of (re)processable PCL-based shape-memory materialsVan Herck, Niels; Defize, Thomas ; Jérôme, Christine et alConference (2016, September 12)Detailed reference viewed: 14 (2 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: 53 (0 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: 53 (16 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: 23 (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: 78 (6 ULg) Occurence of the new variant of rabbit haemorrhagic disease virus (RHDV2) in wild populations of rabbits in Southern BelgiumVolpe, Rosario ; Lesenfants, Christophe ; Paternostre, Julien et alConference (2016, September 09)Rabbit haemorrhagic disease (RHD) is a highly infectious and fatal disease of the European rabbit (Oryctolagus cuniculus), responsible for important economic losses in the rabbit industry. The ... [more ▼]Rabbit haemorrhagic disease (RHD) is a highly infectious and fatal disease of the European rabbit (Oryctolagus cuniculus), responsible for important economic losses in the rabbit industry. The aetiological agent of the disease is a RNA virus (RHDV, Lagovirus, Caliciviridae) first detected in China in 1984. Currently RHDV is endemic in most parts of Europe, Asia and North Africa. Phylogenetic analyses of RHDV strains have identified 3 distinct groups : the classic RHDV, the variant RHDVa and RHDV2. This latter has been detected in France for the first time in 2010 in domestic and wild rabbits (Le Gall-Reculé G et al., 2013) and since then has spread throughout Europe, replacing the circulating RHDV/RHDVa strains in most european countries. RHDV2 has already been detected in Belgium in rabbitries (Marlier D et al., 2014). Here, we report for the first time the presence of RHDV2 in wild rabbits in Southern Belgium. In november 2015, the Surveillance Network of Wildlife Diseases received seven dead wild rabbits for necropsy. The discovery of 7 fresh carcasses found at the same time in a same area (Hainaut province) emphasised the infectious or intoxication hypothesis as cause of death. Postmortem examinations were performed at the Faculty of Veterinary Medicine (FVM) of the University of Liege according to a systematic protocol based on gross lesions, histopathological and targeted microbiological analysis. For necropsy, each rabbit (1) was weighted and age was determined by the presence/absence of the distal ulna protuberance, (2) stomach was investigated to exclude poison, (3) spleen was systematically driven into Yersinia CIN culture media for detection of Yersinia pseudotuberculosis, (4) lungs and livers were systematically (a) packaged into 10% formaldehyde solution for histopathology analysis (Service of Pathology, FVM) and (b) frozen at -20°C for RHDV analysis (Scanelis Laboratory,Toulouse, France) and finally (6) feces were gathered for parasitology (Service of Parasitology, FVM). At necropsy, animals (5 adults: 3 males/2 females and 2 juveniles: 1 male/1 female) were in good condition. No hematomas or broken bones were detected, only one displayed clues of diarrhoea. Examinations of the carcasses showed congestion of lungs/kidneys and livers were macroscopically normal. No foreign body or suspicious particles was seen in the stomachs, only one rabbit was hardly infested by tapeworms in the gut. Histopathological examination revealed haemorragic lung lesions in one animal while 5 of them presented severe necrotic hepatitis, sometimes associated with peri-angiocholitis. Only one animal presented an abnormal high rate of coccidia in feces. Samples of livers were sent to Scanelis Laboratory for RHDV RT-qPCR diagnostic. The results were positive for the new variant RHDV2 in 5 out of the 7 rabbit livers. All the samples were negative for the classic RHDV. To determine if RHDV2 was already present before 2015 in wild rabbits in the region, we tested a series of livers that had been collected in 2013 and 2014 for a retrospective study. Among the 25 rabbit livers checked, 12 presented necrotic hepatitis and were sent for analysis. Ten were confirmed positive by RT-qPCR for RHDV2. [less ▲]Detailed reference viewed: 32 (2 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) 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: 32 (1 ULg) SOUTENIR LE DÉVELOPPEMENT DU LANGAGE ET DE LA COMMUNICATION EN MILIEU SCOLAIREMaillart, Christelle ; Bergeron-Morin, Lisandre ; Leroy, Sandrine Conference (2016, September 08)Detailed reference viewed: 40 (7 ULg) Sécurité et santé au travail dans les bassins miniers wallons des années ’50Geerkens, Eric Conference (2016, September 08)Detailed reference viewed: 23 (1 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: 15 (1 ULg) Should We Revisit The Rise of the Creative Class?Levaux, Christophe Conference (2016, September 08)Detailed reference viewed: 14 (1 ULg) Measurement of Innovation: Where Do We Stand?Artige, Lionel Conference (2016, September 08)Detailed reference viewed: 27 (2 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: 38 (11 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: 39 (5 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: 25 (2 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: 52 (8 ULg) Decidable properties of extension graphs for substitutive languagesDolce, Francesco; Leroy, Julien ; Kyriakoglou, RevekkaConference (2016, September 07)Detailed reference viewed: 13 (0 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: 39 (2 ULg) Auxetic inclusions in cellular solids allow tailoring Poisson’s ratio and enhancing stiffnessZorzetto, Laura ; Ruffoni, Davide Conference (2016, September 07)Detailed reference viewed: 35 (6 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: 30 (9 ULg) Interfaces in multi-material architectures fabricated by polyjet printingZorzetto, Laura ; Rink, Marta; Briatico Vangosa, Francesco et alConference (2016, September 07)Detailed reference viewed: 49 (8 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: 26 (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: 97 (18 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: 21 (4 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: 18 (4 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: 40 (13 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: 22 (1 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: 39 (4 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: 17 (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: 25 (3 ULg) Non-destructive measurements of the volume magnetic behavior of large bulk GdBCO single domains and ferromagnet/superconductor structuresVanderbemden, Philippe ; Egan, Raphael; Morita, Mitsuru et alConference (2016, September 05)The present work deals with magnetic measurements on bulk large grain GdBa2Cu3O7 (GdBCO) single domains using a recently constructed bespoke magnetometer [Rev. Sci. Instrum. 86 025107 (2015)]. The device ... [more ▼]The present work deals with magnetic measurements on bulk large grain GdBa2Cu3O7 (GdBCO) single domains using a recently constructed bespoke magnetometer [Rev. Sci. Instrum. 86 025107 (2015)]. The device enables the measurement of magnetic moments as large as 1 Am^2 (1000 emu) on large bulk samples up to 20 mm diameter at 77 K. This extends significantly the accessible measurement range of “off-the shelf” magnetometers (e.g. SQUID, VSM). Unlike Hall probe mapping, the measured signal is representative of the superconducting currents flowing across the entire height of the sample. Since the device is based on a flux extraction technique and does not include any Hall probe, another advantage is that no gap between a Hall probe and the sample needs to be taken into account to interpret the results. In the present work we first show how the dimensions of the sensing coils and integration bounds are chosen in such a way the magnetometer is sensitive to dipolar magnetic moment of the sample, while being insensitive to moments of higher order. Next we study the relaxation of the trapped magnetic moment under various magnetization processes. The sensitivity of the device allows small variations of m (e.g. ~ 2% for 1 hour) to be recorded. We show experimentally that the relaxation of the magnetic moment of the whole sample is reduced strongly if the superconductor is not fully magnetized, either in field cooled (FC) or zero-field cooled (ZFC) conditions. The practical consequence is that an abnormally slow magnetic relaxation (large E-J power law exponent n) under a conventional magnetization procedure indicates that the bulk superconductor could be magnetized further. In a second set of experiments, we study the increase of magnetic moment of a bulk superconductor when it is attached to a soft ferromagnetic disk. We also examine the irreversible demagnetization of these structures when subjected to crossed magnetic fields and compare to the magnetic moment of a classical (Nd-Fe-B) permanent magnets in the same conditions. Acknowledgements: This work is part of an "Action de Recherches Concertees" grant (ARC 11/16 -03) from the "Communaute Francaise de Belgique". [less ▲]Detailed reference viewed: 20 (2 ULg) New crystallographic data on several uranyl mineralsDal Bo, Fabrice ; Hatert, Frédéric ; Philippo, SimonConference (2016, September 04)Detailed reference viewed: 14 (1 ULg) How to implement the recommendations for Quality Physical Education?Cloes, Marc ; Ralaivao, Michel; Ranaivoson, Patrice et alConference (2016, September 03)According to the growing of the sedentariness over the world and to its negative resulting consequences for the society, it is now mandatory to act. Following the socioecological model, the solution of ... [more ▼]According to the growing of the sedentariness over the world and to its negative resulting consequences for the society, it is now mandatory to act. Following the socioecological model, the solution of this challenge can be found in a multi-sectoral approach involving all pillars of the society. School represents the corner stone of any project aiming to influence the future. It has been pointed out as a determining element in the impact of projects aiming to promote physical activity in children as well as in adolescents, particularly when combined with other actors such as the community. During school time, several opportunities are available in order to increase the time spent in physically active behavior. A quality physical education (QPE) plays a central role in such action of the school. In 2015, UNESCO proposed guidelines aiming to promote QPE all around the world. In fact, it appears that, in many countries, stakeholders as well as physical educators do not have the resources needed to change the current policies and practices. Moreover, literature does not provide theoretical/practical support that would be necessary to implement new teaching strategies. This symposium will focus on an action research aiming to go from theory to practice on a national level. The study is built on the collaboration between the International Committee of Sport Pedagogy and the ‘Académie Nationale des Sports’ (ANS) of Madagascar. It is designed to reform and modernize physical education and sports organization in this country. The cooperation focused on the improvement of the quality of physical education, school sports, and leisure/competitive sports practice. It is based on a bottom-up process. The major aim of this process is to identify the priorities of the country in order to improve the quality of physical education in schools, sports clubs and communities emphasizing diversity, accessibility, inclusion and equity. Qualitative approaches have been implemented in order to take into account the needs of the people and the available resources. [less ▲]Detailed reference viewed: 29 (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: 40 (12 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: 28 (4 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: 15 (2 ULg) Assessing Basic Motor Competencies in Primary School – an International Comparative Study in EuropeScheuer, Claude; Cloes, Marc ; Colella, Dario et alConference (2016, September 03)A central aim of primary physical education (PE) is the promotion of physical competencies as a necessary condition of developing a physically active lifestyle and to be able to participate in the Olympic ... [more ▼]A central aim of primary physical education (PE) is the promotion of physical competencies as a necessary condition of developing a physically active lifestyle and to be able to participate in the Olympic community. We defined basic motor competencies as physical performance dispositions, which evolved from task-specific requirements in the culture of sports and exercise. They are supposed to be learnable, based on previous experiences and can be improved through practice. Potential evaluations of effects in PE need to consider situation-specific and context-dependent characteristics of PE as well as prior experiences of pupils. Therefore, a design for test items, which are closely related to PE and vary in difficulty depending on the age of the pupils, is necessary. For this purpose, we developed the MOBAK-1 test instrument for the assessment of basic motor competencies in first graders. It allows teachers to identify groups in need of special support, and initiate these support measures to reduce inequalities. The first study took place in Zurich (Switzerland) and focused on construct validity (e.g., the factorial validity of the instrument). Between spring 2015 and spring 2016, the MOBAK-1 test instrument was and will be implemented in further countries in Europe. At this time, we have four samples of four different countries: (1) Switzerland (Zurich) (N = 317; girls = 55%; age: M = 7.04 years [SD = .37]; BMI = 16.08 [SD = 2.25]) assessed by University of Basel (Dr. Christian Herrmann); (2) Germany (Frankfurt) (N = 1061; girls = 45%; age: M = 6.80 years [SD = .89]; BMI = 16.30 [SD = 2.37]) assed by University of Frankfurt (Prof. Dr. Christopher Heim); (3) Lithuania (Kaunas) (N = 120; girls = 48%; age: M = 7.76 years [SD = .33]; BMI = 16.14 [SD = 2.30]) assessed by Lithuanian Sports University (Assoc. Prof. Dr. Arunas Emeljanovas); (4) Italy (Foggia) (N = 85; girls = 45%; age: M = 7.24 years [SD = .30]; BMI = 17.53 [SD = 3.04]) assessed by University of Foggia (Prof. Dr. Dario Colella). Further samples are currently on the way to be completed in four other countries: (1) Luxembourg (N = 280) assessed by University of Luxembourg (Claude Scheuer); (2) Slovakia (Trnava) (N = 240) assessed by University of Trnava (Dr. Dana Masarykova); (3) Czech Republic (Brno) (N = 600) assessed by University of Brno (Dr. Petr Vlcek); (4) Belgium (Liège) (N = 450) assessed by University of Liège (Prof. Dr. Marc Cloes and Dr. Boris Jidovtseff). In the initial validation study in Switzerland, two factors consisting of four items each were found. The related EFA (Study 1: CFI=.98; RMSEA=.024) and CFA (Study 2: CFI =.95; RMSEA=.044) revealed good model fit indices. The first factor “Locomotion” represents body movements (e.g., balancing), the second factor “Object-control” represents ball control (e.g., catching). Conclusions: The developed MOBAK test instrument meets psychometric validity demands based on the Swiss data. The presentation will show the results of the validation studies in further European countries and the results of the comparative study. [less ▲]Detailed reference viewed: 26 (5 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: 20 (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: 58 (1 ULg) “That’s only statistics”:Recording PPPs in national accountsPiron, Damien Conference (2016, September 02)Detailed reference viewed: 23 (3 ULg) "Right to shape" decisions: the closing up as new strategy to move forward with high-level radioactive wastesParotte, Céline Conference (2016, September 02)Short Abstract This presentation suggests a comparison between public invited critics and their integrations in Belgian, Canadian and French institutionalized processes to highlight the different ... [more ▼]Short Abstract This presentation suggests a comparison between public invited critics and their integrations in Belgian, Canadian and French institutionalized processes to highlight the different combinations of opening up and closing down appraisals and commitments. This comparison reveals the closing up strategy of government to move forward with nuclear wastes. Since the 90’s onwards, Canadian, Belgian and French nuclear establishment (Durant 2009) have developed several different strategies to involve the public at each constitutive steps of the siting process of nuclear wastes management. Each of them has divided the decision-making process in distinct phases to focus first on the conceptual phase (go for an option) before the operational phase (go for siting). Each country has its own dynamic managed by different actors. For example, in Canada, the nuclear waste organization (NWMO) has provided iterative and permanent experts and public consultations since 2002. In France, it is the French PTA (OPECST) and National Commission of Public Debate (CNDP) who have periodically provided punctual public consultations before every important commitment. Meanwhile in Belgium, only two important punctual debates have been provided by the nuclear waste organization (ONDRAF) and an independent foundation (FRD) and are still waiting for the “go for an option”. This presentation suggests a comparison of the public invited critics (Wynne 2007) who have accepted the invitation of nuclear wastes managers, following their integrations in three different institutionalized processes (in Belgium, in France and in Canada) and the change their integrations produced in terms of closing down and opening up appraisals and commitments (Stirling 2008). It highlights how the different governments finally chosen a closing “up” commitment in order to manage the right of public to continue to shape partially the commitment as well the right of expert to continue to develop the option (geological disposal) they support since the 70’s. Data used include a combination of theoretical and empirical materials – i.e. participatory observations of consultation processes, 90 semi-directive interviews with policy makers, nuclear waste agencies, nuclear regulators in France, Belgium and Canada and local actors such as members of local information and monitoring council (CLIS) and members of community liaison committee of four volunteer collectivities (CLC). Durant, Darrin. 2009. "Radwaste in Canada: a political economy of uncertainty." Journal of Risk Research 12 (7-8):897-919. doi: 10.1080/13669870903126127. Stirling, Andy. 2008. ""Opening Up" and "Closing Down" Power, Participation, and Pluralism in the Social Appraisal of Technology." Science, Technology & Human Values 33:262-294. Wynne, Brian. 2007. "Public participation in science and technology: performing and obscuring a political–conceptual category mistake." East Asian Science, Technology and Society 1 (1):99-110. [less ▲]Detailed reference viewed: 18 (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: 45 (7 ULg) Short-term memory for serial order in musical and verbal domains: comparison between musicians and nonmusiciansGorin, Simon ; Mengal, Pierre ; Majerus, Steve Conference (2016, September 02)Detailed reference viewed: 22 (4 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: 14 (2 ULg) Successional trajectories of cyanobacterial communities following glacier retreat in Svalbard (High Arctic)Stelmach Pessi, Igor ; Pushkareva, Ekaterina; Borderie, Fabien et alConference (2016, September 01)The effects of global warming are pronounced at high northern latitudes, where the warming trend observed for the past decades is almost twice as the global average. Most glaciers in Svalbard (High Arctic ... [more ▼]The effects of global warming are pronounced at high northern latitudes, where the warming trend observed for the past decades is almost twice as the global average. Most glaciers in Svalbard (High Arctic) have been retreating and thinning since the end of the Little Ice Age in the late 19th century, and retreat rates have increased substantially in the last decades. As a glacier retreats, it systematically exposes new terrestrial habitats for the colonization by pioneering (micro)organisms. Distance from the glacier terminus can be used as a proxy for time since deglaciation, which makes glacier forefields well suited for the study of primary succession. In the present study, we investigated the successional trajectories of cyanobacterial communities along a 100-year deglaciation gradient in the forefield of two Svalbard glaciers (Ebba- and Hørbyebreen). Cyanobacterial abundance was assessed by epifluorescence microscopy and cyanobacterial diversity was investigated by pyrosequencing of partial 16S rRNA gene sequences. Filamentous cyanobacteria were more abundant than unicellular and heterocystous cyanobacteria in both forefields, and an increase in the abundance of cyanobacteria was observed along the deglaciation gradients. Pseudanabaenales was the most OTU-rich order, followed by Chroococcales, Oscillatoriales, Synechococcales, Nostocales and Gloeobacterales. At the genus level, classified phylotypes were assigned to Leptolyngbya, Phormidium, Nostoc, Pseudanabaena, Chroococcidiopsis and Microcoleus. Interestingly, OTU richness increased along the deglaciation gradient in Ebbabreen, but an inverse correlation was observed in Hørbyebreen. Beta diversity estimations indicated contrasting cyanobacterial phylogenetic structures along the temporal gradient, with a clear separation of initial (10-20 years), intermediate (30-50) and advanced (80-100) communities. Time since deglaciation accounted for around 25% of the phylogenetic variability in both forefields, with organic carbon content also explaining a significant proportion of community turnover along the deglaciation gradients. Taxonomic composition was somewhat constant along the deglaciation gradient, but OTUs associated with initial communities were related to sequences predominantely restricted to polar biotopes, while advanced communities included phylotypes related to cosmopolitan taxa. [less ▲]Detailed reference viewed: 17 (1 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: 27 (0 ULg) Strategies of the Walloon dairy breeders faced to the uncertain dairy futureDalcq, Anne-Catherine ; Dogot, Thomas ; Soyeurt, Hélène et alConference (2016, September 01)This study observes the strategies, and their determinants, of the Walloon dairy breeders faced to the post quota perspective through the realization of 245 surveys, conducted from November 2014 to ... [more ▼]This study observes the strategies, and their determinants, of the Walloon dairy breeders faced to the post quota perspective through the realization of 245 surveys, conducted from November 2014 to February 2015. Three kinds of strategical variables were defined and related to the evolution of milk production (MP) [the breeders who increase MP (HighMP) vs. keep constant MP (ConstantMP) vs. stop MP]; the valorisation of MP [alternative (ValMP) vs. classical] and the diversification of activities [with (DivMP) vs. without such activities]. The relationships between the chosen strategies and the quantitative technical variables were studied using generalized linear models. The independence between qualitative technical variables and the strategical variables was tested using Chi Square test. HighMP and ConstantMP bredeers represent 38.4% and 53.9% of respondents, respectively. HighMP breeders were significantly more declared as legal entity (p-value = 0.03), had more family members on the farm (p-value<0.01), larger agricultural area in property (p-value = 0.03) and higher MP quota (p-value = 0.01) compared to ConstantMP breeders. Only 9.8% of respondents decide to valorise differently MP. ValMP breeders tend to have more employees (p-value = 0.08) and an agricultural area less fragmented (p-value = 0.07) than classical breeders. A total of 7.8% of respondents decide to develop other activities. DivMP breeders tend to have more employees (p-value = 0.10), more agricultural area in property (p-value = 0.03) and a more recent year of installation (p-value < 0.01). Finally, 44.9% of ConstantMP breeders do not want to start an alternative valorisation of MP and diversify their activities. In conclusion, a relationship exists between, amongst others, the legal status, workforce available, characteristics of the agricultural area, the dairy production and the strategy chosen by the Walloon dairy breeders. [less ▲]Detailed reference viewed: 28 (5 ULg) Wood hydrolysates as feedstocks for Chlorella growth and fatty acid productionMiazek, Krystian ; Goffin, Dorothée ; Richel, Aurore Conference (2016, September)Detailed reference viewed: 27 (1 ULg) Les aménagements immobiliers. Problèmes d'identification et d'interprétationMas, Juliette Conference (2016, September)Detailed reference viewed: 5 (1 ULg) Virus diagnostic and high throughput sequencing: Does bioinformatics really matter? Preliminary analysis of bioinformatic proficiency testing in the frame of COST Action FA1407Massart, Sébastien ; Olmos, Antonio; Adams, Ian et alConference (2016, September)Detailed reference viewed: 40 (1 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: 19 (1 ULg) Properties of single fasteners - Ring shank nailsMergny, Elke ; Sandhaas, CarmenConference (2016, September)In Eurocode 5, nailed joints are designed using the Johansen model extended with the rope effect. The necessary input parameters are embedment strength fh, yield moment My and withdrawal capacity Fax. We ... [more ▼]In Eurocode 5, nailed joints are designed using the Johansen model extended with the rope effect. The necessary input parameters are embedment strength fh, yield moment My and withdrawal capacity Fax. We can obtain these parameters by using empirical equations based on regression analysis. These equations are given by EC5, for smoothed nails. However, especially for ring shank nails, no consistent rules are given in the current version of Eurocode 5 and the values must be taken from technical documents of the single nails. The aim of this STSM was firstly to develop a database. It was based on 96 reports, mostly about ring shank nails tests, carried out for certification purposes, from 33 producers. Based on this extensive database, regression analyses have been carried out, especially the wire tension strength 𝑓𝑢, the yield moment 𝑀𝑦 and nail tension capacity 𝐹𝑡, all are direct nail proprieties. Potential benefits are more robust design models covering a large range of nails, reduced testing and simplified design equations. [less ▲]Detailed reference viewed: 13 (1 ULg)