References of "Poster"      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 401 to 500 of 912     1 2 3 4 5 6 7 8 9 10     Reduced early visual processing of own body images in anorexia nervosa: An event-related potentials studyLutz, Annika ; Herbert, Cornelia; Schulz, André et alPoster (2016)Introduction. Although body image distortion in anorexia nervosa (AN) has been extensively studied over the past decades, its underlying mechanisms are not yet fully understood. Neuro-imaging studies have ... [more ▼]Introduction. Although body image distortion in anorexia nervosa (AN) has been extensively studied over the past decades, its underlying mechanisms are not yet fully understood. Neuro-imaging studies have identified functional and structural alterations in brain areas involved in visual body perception, but the time course of visual body processing in AN remains mostly unexplored. The current study used event-related brain potentials (ERPs) to investigate single processing steps along the time course, particularly the visual processing of physical body image characteristics (featural processing, P1) and the recognition of a body as such (configural processing, N1). Methods. Twenty in-patients with AN, and 20 healthy women viewed photographs of themselves, of another woman’s body and of their own and another woman’s standardized object (cup) with concurrent EEG recording. Results. Body images elicited an accentuation of the P1 component (105-160 ms), which was absent for the comparison between own-body and own-cup images in the AN group. Results regarding the N1 component suggest alterations in object processing in AN. Conclusions. Our results demonstrate that individuals with AN show reduced featural processing of their own body image, a process which, due to its position early in the visual processing stream, is unlikely to involve higher cognitive stimulus processing. This suggests a possible role of previously undetected pre-conscious mechanisms in body image disturbance. [less ▲]Detailed reference viewed: 208 (8 UL) Detecting Electricity TheftGlauner, Patrick Poster (2016)Detailed reference viewed: 121 (16 UL) Short-term Time Series Forecasting with Regression AutomataLin, Qin; Hammerschmidt, Christian ; Pellegrino, Gaetano et alPoster (2016)We present regression automata (RA), which are novel type syntactic models for time series forecasting. Building on top of conventional state-merging algorithms for identifying automata, RA use numeric ... [more ▼]We present regression automata (RA), which are novel type syntactic models for time series forecasting. Building on top of conventional state-merging algorithms for identifying automata, RA use numeric data in addition to symbolic values and make predictions based on this data in a regression fashion. We apply our model to the problem of hourly wind speed and wind power forecasting. Our results show that RA outperform other state-of-the-art approaches for predicting both wind speed and power generation. In both cases, short-term predictions are used for resource allocation and infrastructure load balancing. For those critical tasks, the ability to inspect and interpret the generative model RA provide is an additional benefit. [less ▲]Detailed reference viewed: 77 (4 UL) Some Properties of Homogenous Trellis-Constrained CodesFranck, Christian ; Sorger, Ulrich Poster (2016)We consider Homogenous Trellis-Constrained Codes (HTCC), a generalization of Turbo-codes where all bits are constrained. No efficient decoding algorithm is known for these codes, so our results are ... [more ▼]We consider Homogenous Trellis-Constrained Codes (HTCC), a generalization of Turbo-codes where all bits are constrained. No efficient decoding algorithm is known for these codes, so our results are primarily of theoretical interest. We propose a technique to derive an upper bound for the maximum-likelihood (ML) decoding of BSC errors. Our tech- nique is based on the weight distributions of the constituent codes and it can also be used when a specific number of errors e is known. We observe that with an ML-decoder some HTCC codes exhibit an error correcting performance close to that of random codes. For those codes we also observe a significant performance gap between ML-decoding and practical decoding based on belief-propagation. [less ▲]Detailed reference viewed: 174 (7 UL) Vorurteile von Grundschüler/innen gegenüber fiktiven Kindern unterschiedlicher Herkunft.Paßreiter, L; Schäfer, A.; Baudson, Tanja Gabriele Poster (2016)Detailed reference viewed: 61 (0 UL) Constructive design of an aluminum microchannel evaporator for a solar hybrid moduleSchneider, Lars Marvin; Rullof, Johannes Poster (2016)This poster summarizes the findings of the scientific report with the following content: As part of the PVT-direkt project, a constructive evaporator design was developed. First, the findings of the ... [more ▼]This poster summarizes the findings of the scientific report with the following content: As part of the PVT-direkt project, a constructive evaporator design was developed. First, the findings of the current project, the necessary manufacturing fundamentals and the problem of lubricating oil return are presented. Designing the aluminum evaporator was based on a comprehensive three-phase structure. This is first aimed at identifying relevant material properties and their availability. A thorough literature review was carried out to evaluate the findings with respect to the refrigerant distribution and the oil recirculation. Following a constructive evaporator design was developed with respect to the identified standard temperature drop caused by pressure losses to ensure the oil return in comparable evaporator concepts. From the results of a simulation of the evaporation process, the temperature distribution was analyzed in connection with the created design model. Due to the complexity of simulating the refrigerant distribution, this simulation was not carried out – only their general influence is involved. All of this resulted in two evaporator concepts - a harp and a meander model – which were ultimately evaluated and converted into manufacturing drawings. Therefore, this document provides the manufacturing specifications for the prototype to be produced. [less ▲]Detailed reference viewed: 46 (1 UL) Experimental studies of the technical feasibility of a lamination process for PVT-direct modulesHilger, Lukas; Roßbach, Nils; Wirth, Florian et alPoster (2016)The PVT-direct module covers the technical connection of solar PV technology and solarthermal systems. The structure is similar to conventional PV modules apart from the backsheet which is replaced by an ... [more ▼]The PVT-direct module covers the technical connection of solar PV technology and solarthermal systems. The structure is similar to conventional PV modules apart from the backsheet which is replaced by an aluminum backside plate. Along with compressor, gas cooler for heat rejection and expansion valve the PVT-direct module acts as an evaporator in a heat-pump cycle. The module is characterized by a direct CO2 evaporation in small microchannels which are brazed on the aluminum backside plate. The combination of both photovoltaic and thermal components in one module leads to high demands in terms of the choice of materials and the production process itself. In this context, further investigations on the technical feasibility of a lamination process for solar PVT-direct modules are necessary in order to guarantee an intended market maturity. The development of a suitable lamination process and its parameters form the major part of this work. The lamination schedule depends on the performance and structure of the used encapsulating material as well as the laminator itself. The lamination process is adjusted through experimental studies until satisfactory results are achieved. It can be characterized by the maximum lamination temperature and the total process time along with the heating/cooling ramp. The additional aluminum backside plate including headers and microchannels can have a significant impact on the PVT-direct module during lamination process. Therefore, measurement methods which indicate the state of the module after the lamination are required. On the one hand, the quality of the adhesion between the different parts of the module is an important factor for long-term resistance of the system. The cross linking of the encapsulating material and of the adhesion layer is verified by DSC-Measuring. On the other hand - due to a changed design of the PVT direct module and mechanical stress distribution during the lamination process - the mechanical condition of the cells inside of the laminate is checked. This can be evaluated by Electroluminescence-Measuring in order to ensure the absence of cracks and fraction of the PV-cells. Current tasks involve the distortion of the laminated modules due to different thermal expansion coefficients of glass and aluminum as well as the occurrence of blisters in the laminate. These issues and the lamination of a module in standard measures will be addressed in the ongoing process of the project. [less ▲]Detailed reference viewed: 45 (2 UL) Discrete mechanical models and upscaling techniques for discrete materialsBeex, Lars ; Bordas, Stéphane Poster (2016)Numerous natural and man-made materials are essentially discrete structures at the mesoscale or microscale (see Fig. 1). Discrete mechanical models can be formulated to capture typical mechanical ... [more ▼]Numerous natural and man-made materials are essentially discrete structures at the mesoscale or microscale (see Fig. 1). Discrete mechanical models can be formulated to capture typical mechanical phenomena arising from this discreteness. Failure in these materials, which often starts with the fracture of an individual bond, can be predicted based on the small-scale mechanics with these models. For failure, but also for non-local mechanics, no phenomenological descriptions are required in these models. This makes them more predictive than constitutive material models for this type of materials. [less ▲]Detailed reference viewed: 134 (5 UL) Characterization of the Immune Mechanisms Involved in Microglia ActivationSousa, Carole Poster (2016)Detailed reference viewed: 45 (1 UL) Excitation dependence of photoluminescence transitionsSpindler, Conrad Poster (2016)Detailed reference viewed: 71 (6 UL) Complex problem solving and intelligence. A meta-analysisStadler, Matthias; Becker, N.; Gödker, M. et alPoster (2016)Detailed reference viewed: 167 (1 UL) Evaluation of a CFD-Simulation approach for modelling CO2 evaporation in microchannels in Ansys Fluent using a mixture-modelDvorak, Tom; Mazitzis, Nikolaos; Cousin, René et alPoster (2016)Microchannels shall be used for evaporation of CO2 in a heat-pump cycle of a hybrid PV-module with direct heat recovery (PVT-direct). In order to predict the required tube length and the expected pressure ... [more ▼]Microchannels shall be used for evaporation of CO2 in a heat-pump cycle of a hybrid PV-module with direct heat recovery (PVT-direct). In order to predict the required tube length and the expected pressure losses of the microchannel evaporator, a CFD simulation model was implemented and evaluated. The simulation shall finally help finding the adequate size of the evaporator and optimize its geometry. For the simulation the software “Fluent” was chosen using the two phase mixture-model including the Lee-model for evaporation. As the tubes in the microchannel system represent an axis-symmetric setup, a 2D-geometry is sufficiently suitable for the model and its mesh. After an initial testing of the mixture model, it could be seen that the conservation of mass and energy were not correctly calculated with the advised standard set of parameters, neither the phase change mechanism with its characteristic latent heat. In order to get reasonable results with the mixture model, the input parameters of the evaporation rate and the bubble diameter were systematically varied and validated by manual calculation based on experimental data published in the standard literature. To further improve the numerical quality and stability of the simulation, solver parameters were changed. The adjustment of discretization schemes and the under-relaxation factors were most successful. The effect of different boundary conditions for solar radiation and convective heat on the relevant evaporator surface was also investigated. The test simulations showed that the mixture model is appropriate for a low vapor volume fraction but maybe reaches its limits at higher vapor volume fractions as the flow regime changes. It needs more investigation to prove if drop-evaporation will be sufficiently represented by the chosen model. Consequently, the modelling approach must be optimized and validated for the relevant volume vapor fraction of up to 95 Vol %. This will be the task for the future. And also completely different model approaches have to be considered. [less ▲]Detailed reference viewed: 336 (0 UL) Multiscale hydrogeological and hydrogeophysical approach to monitor vadose zone hydrodynamics of a karst systemWatlet, Arnaud; Poulain, Amaël; Francis, Olivier et alPoster (2016)The vadose zone of karst systems plays an important role on the water dynamics. In particular, temporary perched aquifers can appear in the subsurface due to changes of weather conditions, reduced ... [more ▼]The vadose zone of karst systems plays an important role on the water dynamics. In particular, temporary perched aquifers can appear in the subsurface due to changes of weather conditions, reduced evapotranspiration and the vertical gradients of porosity and permeability. Although many difficulties are usually encountered when studying karst environments due to their heterogeneities, cave systems offer an outstanding opportunity to investigate vadose zone from the inside. We present a multi-scale study covering two years of hydrogeological and geophysical monitoring of the Lomme Karst System (LKS) located in the Variscan fold-and-thrust belt (Belgium), a region (∼3000 ha) that shows many karstic networks within Devonian limestone units. Hydrogeological data cover the whole LKS and involve e.g. flows and levels monitoring or tracer tests performed in both vadose and saturated zones. Such data bring valuable information on the hydrological context of the studied area at the catchment scale. Combining those results with geophysical measurements allows validating and imaging them at a smaller scale, with more integrative techniques. Hydrogeophysical measurements are focused on only one cave system of the LKS, at the Rochefort site (∼40 ha), taking benefit of the Rochefort Cave Laboratory (RCL) infrastructures. In this study, a microgravimetric monitoring and an Electrical Resistivity Tomography (ERT) monitoring are involved. The microgravimetric monitoring consists in a superconducting gravimeter continuously measuring gravity changes at the surface of the RCL and an additional relative gravimeter installed in the underlying cave located 35 meters below the surface. While gravimeters are sensible to changes that occur in both the vadose zone and the saturated zone of the whole cave system, combining their recorded signals allows enhancing vadose zone’s gravity changes. Finally, the surface ERT monitoring provide valuable information at the (sub)-meter scale on the hydrological processes that occur in the vadose zone. Seasonal water variations and preferential flow path are observed. This helps separating the hydrological signature of the vadose zone from that of the saturated zone. [less ▲]Detailed reference viewed: 122 (11 UL) Agroecology in Burkina Faso: A Smallholders' Livelihoods' Catalyst?Kapgen, Diane Poster (2016)Detailed reference viewed: 29 (0 UL) Assessment of BLT Tide Gauge Benchmark Monitoring (TIGA) repro2 SolutionsHunegnaw, Addisu ; Teferle, Felix Norman Poster (2015, December 17)In 2013 the International GNSS Service (IGS) Tide Gauge Benchmark Monitoring (TIGA) Working Group (WG) started their reprocessing campaign, which proposes to re-analyze all relevant Global Positioning ... [more ▼]In 2013 the International GNSS Service (IGS) Tide Gauge Benchmark Monitoring (TIGA) Working Group (WG) started their reprocessing campaign, which proposes to re-analyze all relevant Global Positioning System (GPS) observations from 1994 to 2013. This re-processed dataset will provide high quality estimates of land motions, enabling regional and global high-precision geophysical/geodetic studies. Several of the individual TIGA Analysis Centres (TACs) have completed processing the full history of GPS observations recorded by the IGS global network, as well as, many other GPS stations at or close to tide gauges, which are available from the TIGA data centre at the University of La Rochelle (www.sonel.org). Following the recent improvements in processing models and strategies, this is the first complete reprocessing attempt by the BLT TIGA Analysis centre to provide homogeneous position time series. We report the quality of the multi-year daily solutions from the consortium of the British Isles continuous GNSS Facility (BIGF) and the University of Luxembourg TIGA Analysis Centres (BLT) based on the Bernese GNSS Software Version 5.2 using a double difference (DD) network processing strategy. [less ▲]Detailed reference viewed: 107 (10 UL) Deformation quantizations of symplectic Lie groups and associated PDE's hierarchiesKorvers, Stéphane Poster (2015, December)Detailed reference viewed: 57 (7 UL) Unterschiede zwischen Senioren und jüngeren Personen bei der Beantwortung psychosozialer Fragebogenmaße und deren Implikationen für die Befunderhebung bei Patienten mit schlafbezogenen Atmungsstörungen.Kemper, Christoph ; Specht, Markus; Volk, StefanPoster (2015, December)Detailed reference viewed: 59 (0 UL) GeoGebraTAO, validation of an Adaptive Learning Environment of dynamic geometry. Source of a differentiation individual pathway of the student?Dording, Carole ; Martin, Romain; Kreis, Yves et alPoster (2015, November 24)In this PhD project, about 250 luxembourgish children of 10-12 years explore elementary geometric concepts in a sequence of learning activities, created with the dynamic mathematics system GeoGebra ... [more ▼]In this PhD project, about 250 luxembourgish children of 10-12 years explore elementary geometric concepts in a sequence of learning activities, created with the dynamic mathematics system GeoGebra integrated into the computer-assisted testing framework TAO. The children, who are active in their learning process, are allowed to build new knowledge in an autonomous way and at their own pace. By means of a snapshot of the stimulus containing useful, easily exploitable data, the computer, a diagnostic tool of the competencies of the children in geometry, interprets the answer offered by the child, and based on this answer, gives relaunch instructions to go off to further explore the concepts. So children with special needs are identified and a differentiation individual pathway is inferred through scaffolding or feedback practices. Comparing the obtained results of a pretest and a posttest will allow us to assess the gained knowledge of the children. [less ▲]Detailed reference viewed: 47 (2 UL) A smart multimodal mobility platform that jointly optimises travellers’ needs and transport servicesViti, Francesco ; Toader, Bogdan ; Sprumont, François Poster (2015, November)Detailed reference viewed: 168 (22 UL) Metacognitive approach of decision processes implied in time perceptionLamotte, Mathilde ; Droit-Volet, Sylvie; Izaute, MariePoster (2015, November)Detailed reference viewed: 71 (0 UL) Signal Obstructions at GNSS Stations: Benefits From Multi-GNSS ObservationsAbraha, Kibrom Ebuy ; Teferle, Felix Norman ; Hunegnaw, Addisu et alPoster (2015, October 27)The current accuracy of IGS products, few centimeter level, requires amongst other things that the location for GNSS antennas are nearly optimal for GNSS observations. This includes a low multipath ... [more ▼]The current accuracy of IGS products, few centimeter level, requires amongst other things that the location for GNSS antennas are nearly optimal for GNSS observations. This includes a low multipath environment and little to no signal obstructions. However, this is not guaranteed for every station especially in urban areas and mountainous regions. As some applications such as GNSS for sea level studies or to monitor landslides require GNSS antennas to be installed at a specific site, it is clear that the environment might not be favourable for GNSS observations. In this study, we investigate the effect of signal obstructions on station positions, specifically the height component, based on simulated obstruction scenarios using a modified Bernese GNSS Software version 5.2 (BSW52). The behaviours of different obstruction scenarios and the impact of multi-GNSS (GPS+GLONASS for now) observations for both clear and obstructed stations are discussed. [less ▲]Detailed reference viewed: 180 (19 UL) Praxis- a KontaktdagBöwen, Petra ; Dujardin, Céline ; Romberg, Kathrin Poster (2015, October 22)Wir bieten Studierenden und Arbeitgebern die Möglichkeit, persönlichen Kontakt herzustellen und/oder zu pflegen. Auch Studieninteressierte und die interessierte Öffentlichkeit können „Wissenschaft und ... [more ▼]Wir bieten Studierenden und Arbeitgebern die Möglichkeit, persönlichen Kontakt herzustellen und/oder zu pflegen. Auch Studieninteressierte und die interessierte Öffentlichkeit können „Wissenschaft und Praxis“ hautnah erleben. Im Mittelpunkt steht der persönliche Kontakt. Sie als Praxiseinrichtungen bekommen die Möglichkeit, sich und Ihre Arbeit zu präsentieren. Sie können Kontakte mit potentiellen Praktikanten, Honorarkräften und evtl. zukünftigen Berufseinsteigern herstellen und auch ehrenamtliche Mitarbeiter gewinnen. Sie als Studierende können Kontakte knüpfen für ein konkretes Praktikum, zum Kennenlernen eines bestimmten Praxisfeldes oder zur Kontaktaufnahme mit einem potentiellen Arbeitgeber. [less ▲]Detailed reference viewed: 121 (9 UL) An evaluation of multi-GNSS zenith tropospheric delay products based on real-time satellite productsDing, Wenwu ; Ahmed, Furqan ; Teferle, Felix Norman et alPoster (2015, October)Detailed reference viewed: 169 (10 UL) Exposition gegenüber verkehrsbedingter Luftverschmutzung und Gerechtigkeit - eine innerstädtische Analyse mithilfe eines Residential Choice ModelsSchindler, Mirjam Poster (2015, October)Detailed reference viewed: 144 (2 UL) Quantum moment maps and retracts for symmetric bounded domainsKorvers, Stéphane Poster (2015, October)Detailed reference viewed: 48 (1 UL) Math anxiety is predicted by the strength of number-space associations, over and beyond arithmetic ability and WMGeorges, Carrie ; Hoffmann, Danielle ; Schiltz, Christine Poster (2015, October)Math skills are undeniably important in everyday life. Math anxiety can, however, threaten their optimal development. Given that a fifth of the population experiences high math anxiety, it is important to ... [more ▼]Math skills are undeniably important in everyday life. Math anxiety can, however, threaten their optimal development. Given that a fifth of the population experiences high math anxiety, it is important to identify its origins in order to improve mathematical learning. Research on math anxiety typically focusses on the effects of math ability, WM, and spatial performance. Recent evidence, however, suggests that it also depends on basic numerical processes, with high math anxious individuals featuring less precise numerical representations, as indexed by stronger distance effects. Another marker for the nature of numerical representations is the SNARC effect, alluding to their spatial organization. Although number-space associations depend on WM, spatial performance and arithmetic ability - all related to math anxiety - their relationship with the latter has never been tested. We thus determined whether math anxiety is related to the strength of number-space associations. All participants (n=60, 28 female) completed the r-MARS, the parity judgment, an arithmetic, and visuospatial WM task. We replicated previous findings on the negative relationships between math anxiety and arithmetic ability (r=-0.3, p=0.02), and WM (r=-0.29, p=0.03). But most importantly, we found a significant negative correlation between the SNARC effect and math anxiety (slope=-11.42, r=-0.43, p<0.001), with high math anxious individuals featuring greater interference of the irrelevant magnitude-associated spatial code. Interestingly, number-space associations were the only significant predictor of math anxiety in a multiple regression analysis. Our findings thus provide further evidence for the association between numerical representations and math anxiety, over and beyond arithmetic ability and WM. [less ▲]Detailed reference viewed: 135 (10 UL) How does Language influence Number transcoding?Poncin, Alexandre ; Van Rinsveld, Amandine; Schiltz, Christine Poster (2015, September 29)The German number word system inverts units and tens compared to the Arabic notation. This is not the case in French, which is more transparent with respect to the Arabic number code. The linguistic ... [more ▼]The German number word system inverts units and tens compared to the Arabic notation. This is not the case in French, which is more transparent with respect to the Arabic number code. The linguistic structure of number words can facilitate or impede numerical development and performances in number transcoding tasks. We used an original transcoding paradigm with 4th grade French-speaking children, 4th grade German-speaking children, as well as French-speaking and German-speaking young adults who listened to two-digit numbers and had to identify the heard number among four visually presented Arabic numbers. The novelty of our paradigm consisted in manipulating the order of appearance of the units and tens of the Arabic numbers, leading to three conditions: units-first, tens-first and simultaneous appearance. Results revealed that German-speaking children were globally slower than their French-speaking peers. In contrast, language did not affect overall transcoding speed in young adults. Moreover children from both language groups were faster in transcoding when the order of digit appearance was congruent with the number word system (i.e. units-first in German and tens-first in French) compared to the incongruent and the simultaneous presentation order. This pattern indicates that children tended to process number sequentially during the transcoding task. This pattern differed from the behavior observed in adult, since both German- and French-speaking adults solved the transcoding task faster when tens were presented before units (i.e. tens-first) than the reverse. [less ▲]Detailed reference viewed: 125 (6 UL) Identification with Europe – a matter of exposure?Murdock, Elke ; Ferring, Dieter Poster (2015, September 11)Research on European identity has consistently found low identification with the supra-national category European for participants with low experience levels of Europe. In some instances, higher ... [more ▼]Research on European identity has consistently found low identification with the supra-national category European for participants with low experience levels of Europe. In some instances, higher experience levels of Europe, for example through language competence, exchange programs or work experience have also produced higher levels of identification with Europe. However, overall identification levels with Europe rest still low. To assess the impact of exposure to Europe on identification with Europe, two empirical studies were carried out among adolescents who are growing up with high experience levels of Europe. Participants are students at the European School of Luxembourg, which is divided into language sections representing the member states of the European Union. The students learn a second language from Primary school onwards and more languages are added later on. They attend weekly “European hour” classes and many parents work for one of the European institutions located in Luxembourg. Luxembourg itself is a trilingual country, sharing borders with three countries and a foreign population of 44%. In the first study, 106 students, average age M = 13.64, SD = 1.72 participated and the salience of the supra-national category European was assessed in the spontaneous self-concept using a modified version of the Twenty Statement Test. None of the European school students mentioned “European” in their spontaneous self-concept. In the second study (N = 204, average age M =15.16, SD = 0.84) students were asked to self-categorize in terms of nationality. Bicultural self-definitions were common, but only one student described herself as “European”. These findings amongst the high exposure group to Europe are discussed against a background of identity theories including theories on national identity and wider collective identities. I will argue that European identity is likely to remain elusive and alternative research approaches are suggested within a globalizing world. [less ▲]Detailed reference viewed: 74 (6 UL) Semi-empirical discription of Kohn anomalies in the phonon dispersion of grapheneReichardt, Sven ; Wirtz, Ludger Poster (2015, September 08)Detailed reference viewed: 125 (7 UL) Zur Relevanz psychosozialer Arbeitsbedingungen und mentaler Arbeitsanforderungen für das Erleben von Stress und Burnout.Sischka, Philipp ; Steffgen, Georges Poster (2015, September 07)Das Job Demands-Resources-Modell(JD-R-Modell, z.B.Bakker & Demerouti, 2007; Schaufeli, Bakker, vanRhenen, 2009) weist auf die Bedeutung von psycho-sozialen Arbeitsbedingungen für das Erleben von Stress ... [more ▼]Das Job Demands-Resources-Modell(JD-R-Modell, z.B.Bakker & Demerouti, 2007; Schaufeli, Bakker, vanRhenen, 2009) weist auf die Bedeutung von psycho-sozialen Arbeitsbedingungen für das Erleben von Stress und Burnout hin. Während unterschiedliche ‚JobDemands‘ (Berufsbelastungen, z.B. emotionale, kognitive, physische) einen negativen Einfluss auf die Gesundheit ausüben können, können sich ‚JobResources‘ positiv auf die Gesundheit auswirken. Diese Ressourcen können unterschiedliche Formen annehmen, z.B. soziale Unterstützung durch Kollegen oder eine hohe Autonomie bei der Arbeit. In dieser Studie wurde geprüft, ob wahrgenommener Respekt, Kooperation mit Arbeitskollegen sowie Autonomie bei der Ausführung der Arbeit als Job Ressourcen einen Einfluss auf das Erleben von Stress und Burnout haben. [less ▲]Detailed reference viewed: 378 (23 UL) Groundwater Storage in a Karst Vadose Zone Evidenced Using Gravimetric and Surface-to-borehole ERT Monitoring SystemsWatlet, A.; Kaufmann, O.; Francis, Olivier et alPoster (2015, September 06)Detailed reference viewed: 198 (12 UL) Relationship between cardiovascular reactivity and the perception of the thermal grill illusion of painScheuren, Raymonde ; Duschek, Stefan; Schulz, André et alPoster (2015, September 03)Alterations in blood pressure (BP) and concomitant changes in baroreceptor activation contribute to the modulation of pain sensitivity to warrant homeostatic regulation processes [1][2]. Numerous pain ... [more ▼]Alterations in blood pressure (BP) and concomitant changes in baroreceptor activation contribute to the modulation of pain sensitivity to warrant homeostatic regulation processes [1][2]. Numerous pain studies have described an inverse relationship between BP and nociceptive sensitivity [3][4][5]. It is not known whether a similar relationship plays a role in the framework of the induction of pain in the absence of noxious stimulation. The thermal grill (TG) paradigm is commonly used to trigger this type of paradoxical pain also termed thermal grill illusion of pain (TGI). The goal of the present study was to explore the relationship between cardiovascular activity/reactivity and paradoxical pain sensitivity to get additional insight in the variability of responsiveness (responders and non-responders) to TG stimulation described in the literature [6][7]. We hypothesized that higher BP would be associated with stronger pain inhibitory effects in participants not perceiving the thermal grill illusion of pain (TGI). We moreover expected that the perception of paradoxical pain in the responder group would be paired with lower BP. We tested this hypothesis by comparing both groups with respect to their spontaneous cardiovascular activity (recorded in resting conditions) and their cardiovascular responses to TG stimulation. [less ▲]Detailed reference viewed: 147 (4 UL) Problematizing science as a primary school discipline: Learning from contingencies and diversitiesSchreiber, Catherina ; Siry, Christina ; Reuter, Robert et alPoster (2015, September 03)This paper puts the idea of a contingent nature of science at its fore, asking what we as researchers can learn from seemingly irreconcilable differences in our approaches and interpretations to past ... [more ▼]This paper puts the idea of a contingent nature of science at its fore, asking what we as researchers can learn from seemingly irreconcilable differences in our approaches and interpretations to past, present and future developments in science education. To do so, we aim to explore the potentials of multi-perspectivity in an academic self-experiment. The idea is to problematize science as a school discipline from different theoretical, disciplinary and methodological standpoints. By taking one concrete example of a Luxembourgian primary school curriculum document, four researchers will independently apply their individual lenses on science as a school discipline. Concretely, the coverage of the hedgehog as a “characteristic animal” in our primary school curriculum will be commented on in historical, sociocultural and pedagogical perspectives. This concrete curricular example is seemingly defined and non disputable as a content theme in primary school science education in Luxembourg, and is also to be found in international curriculum policy documents. Yet a seemingly proven fact can be interpreted in multiple ways, not only to bridge controversies, as it is done so often, but as exploring the differences in a self-reflective manner. Through such multiple interpretations, we are specifically looking for inconsistencies between the four different narratives, instead of focusing on consensual conclusions or firm and consistent patterns. Instead we will follow a multi-layered approach to research in order to undertake a métissage approach to analyzing a component of the science pedagogical practice, allowing the different understandings on the Luxembourgian science curriculum to remain and complement each other in a complex manner. [less ▲]Detailed reference viewed: 244 (41 UL) Cognitive Processing of Interoceptive Information and Negative Health OutcomesSütterlin, Stefan; Scheuren, Raymonde ; Mueller, Sven et alPoster (2015, September 02)Detailed reference viewed: 77 (3 UL) Magnetic SANS correlation functions of bulk magnetic materialsMettus, Denis ; Michels, Andreas Poster (2015, September 02)We present model calculations, based on the continuum theory of micromagnetics, for the correlation function of the spin-misalignment SANS cross section of bulk ferromagnets (e.g. elemental ... [more ▼]We present model calculations, based on the continuum theory of micromagnetics, for the correlation function of the spin-misalignment SANS cross section of bulk ferromagnets (e.g. elemental polycrystalline ferromagnets, soft and hard magnetic nanocomposites, nanoporous ferromagnets, or magnetic steels). For such materials, the spin disorder which is related to spatial variations in the saturation magnetization and magnetic anisotropy field results in strong spin-misalignment scattering dΣM/dΩ along the forward direction [1]. When the applied magnetic field is perpendicular to the incoming neutron beam, the characteristics of dΣM/dΩ (e.g. the angular anisotropy on a two-dimensional detector or the asymptotic power-law exponent) are determined by the ratio of magnetic anisotropy-field strength Hp to the jump ΔM in the saturation magnetization at internal interfaces. Here, we analyze the corresponding one and two-dimensional real-space correlations as a function of applied magnetic field, ratio Hp/ΔM, single-particle form factor, and particle volume fraction. Finally, we compare the theoretical results for the correlation function to experimental data on a Nd-Fe-B-based nanocomposite. [less ▲]Detailed reference viewed: 81 (2 UL) A pre-literary intervention in a multilingual setting.Wealer, Cyril ; Fricke, Silke; Engel de Abreu, Pascale Poster (2015, September)Detailed reference viewed: 33 (1 UL) Electronic and Vibrational proprieties of graphene on Ir(111) and SiC(100)Pereira Coutada Miranda, Henrique ; Molina-Sanchez, Alejandro ; Wirtz, Ludger Poster (2015, September)In the last years, graphene has become one of the most studied materials due to its peculiar electronic, optical, thermal, and mechanical properties. It is thus of major importance, for practical ... [more ▼]In the last years, graphene has become one of the most studied materials due to its peculiar electronic, optical, thermal, and mechanical properties. It is thus of major importance, for practical applications, to study how the electronic and vibrational proprieties of graphene change when deposited on a substrate. The non-commensurability of the unit cell of graphene with the substrate leads to the formation of Moiré patterns with accordingly large supercell sizes. Ab-initio calculations using standard plane-wave based codes on these large systems are of high computational cost even for the ground-state calculations. We show the effect that such Moiré patterns have on the band structure by projecting the resulting electronic structure and phonon dispersion onto the unit cell of free-standing graphene with an unfolding scheme. We compare our results with HREELS measurements of the phonon dispersion of graphene on Ir(111). The accurate knowledge of the interaction graphene-substrate will provide important information for future applications of graphene on electronic devices. Work performed in collaboration with the experimental groups of J. Kroeger (TU Ilmenau, Germany) and T. Seyller (TU Chemnitz, Germany). [less ▲]Detailed reference viewed: 222 (3 UL) Activity tracking and indoor positioning with a wearable magnetPopleteev, Andrei Poster (2015, September)This paper presents an unconventional application of digital compass sensors for localization and activity monitoring in ambient assisted living scenarios. Benefits and limitations of the proposed ... [more ▼]This paper presents an unconventional application of digital compass sensors for localization and activity monitoring in ambient assisted living scenarios. Benefits and limitations of the proposed approach are reviewed and compared to these of traditional tracking methods, such as wearable devices, surveillance cameras and device-free localization. [less ▲]Detailed reference viewed: 197 (13 UL) Top-down control over pain in fibromyalgia patients: An experimental study.Van Ryckeghem, Dimitri; Rost, Silke ; Van Damme, Stefaan et alPoster (2015, September)Detailed reference viewed: 88 (1 UL) Validating the PISA 2015 collaborative problem solving approachHerborn, Katharina ; Mustafic, Maida ; Greiff, Samuel Poster (2015, September)Detailed reference viewed: 134 (14 UL) Prefrontal activation during placebo analgesia is related to cognitive reappraisalVan Der Meulen, Marian ; Anton, Fernand Poster (2015, September)Detailed reference viewed: 119 (8 UL) Multiculturalism and its effects on Portuguese Migrants living in LuxembourgBarros Coimbra, Stephanie ; Albert, Isabelle Poster (2015, September)Detailed reference viewed: 109 (14 UL) Does body motion influence arithmetic problem solvingSosson, Charlotte ; Guillaume, Mathieu ; Schuller, Anne-Marie et alPoster (2015, September)Recent evidence indicates that body movements can influence number processing (Hartmann, et al., 2012) and arithmetic problem solving (Lugli, et al., 2013). Thus it was for instance observed that moving ... [more ▼]Recent evidence indicates that body movements can influence number processing (Hartmann, et al., 2012) and arithmetic problem solving (Lugli, et al., 2013). Thus it was for instance observed that moving the arm rightward and upward led to better performance during additions and leftward and downward during subtractions (Wiemers, et al., 2014). These results could be explained by the fact that left/right body motion can be (in)compatible with the attentional motion towards the left/right on the mental number line known to underlie subtractions/additions (i.e. operational momentum effect) (McCrink, et al., 2007; Lindemann, et al., 2011). The compatible situations (i.e. leftwards motion - subtraction and rightwards motion - addition) thus are expected to facilitate arithmetic performance compared to incompatible ones. The present study was designed to test this hypothesis during arithmetic problem solving using: (1) physical passive rotary whole-body motion and (2) virtual environment mimicking a similar passive body motion. Findings of the present study confirm the classical effects known to play a role in arithmetic problem solving. They also revealed that passive rotary whole-body motion - implemented physically or by virtual reality - had no particular effect on the solving of calculations. This is in contrast with previous studies that showed an influence of active head/arm or passive translational movements on numerical task performance. [less ▲]Detailed reference viewed: 121 (8 UL) A global description of the fine Simpson moduli space of 1-dimensional sheaves supported on plane quarticsIena, Oleksandr Poster (2015, September)We give a global description of the fine Simpson moduli spaces of 1-dimensional sheaves supported on plane quartics.Detailed reference viewed: 54 (10 UL) The link between number-space associations and visuospatial abilities depends on visualization profileGeorges, Carrie ; Hoffmann, Danielle ; Schiltz, Christine Poster (2015, September)Background: Evidence for number-space associations comes from the spatial-numerical association of response-codes (SNARC) effect, consisting in faster RTs to small/large digits with the left/right hand ... [more ▼]Background: Evidence for number-space associations comes from the spatial-numerical association of response-codes (SNARC) effect, consisting in faster RTs to small/large digits with the left/right hand respectively. However, the cognitive origin of the effect remains elusive. Previous studies suggested that it might depend on visuospatial processes, since individuals with better performances in 2D (but not 3D) mental rotation tasks displayed weaker number-space associations (Viarouge et al., 2014). Aims: Given the high inter-individual variability of number-space associations, we determined whether the SNARC effect always relies on visuospatial processes or whether its cognitive origin varies with visualization preferences. Method: We distinguished between object-visualizers (n=42, 23 female, age=22.93) and spatial-visualizers (n=42, 15 female, age=23.9) using the Object-Spatial Imagery Questionnaire (Blajenkova et al., 2006). All participants performed the parity judgment task, a 2D visuospatial test and a 3D mental rotation task. Results: In object-visualizers, weaker SNARC slopes were associated with better performances in the 2D (r=0.46, p=0.004), but not 3D (r=-0.04, p=0.79) task, thereby replicating previous observations. Conversely, in spatial-visualizers, the performances in both visuospatial tasks were unrelated to the SNARC effect (2D: r=0.02, p=0.89; 3D: r=0.2, p=0.22). Conclusions: These findings suggest that in object-visualizers, number-space associations and 2D performances underlie common visuospatial processes. Conversely, in spatial-visualizers, number-space associations seem to result from cognitive mechanisms other than those recruited during the aforementioned visuospatial tasks (e.g., verbal-spatial coding mechanisms). All in all, we were able to further unravel the mechanisms underlying number-space associations and could highlight visualization preferences as an additional explanation for the great inter-individual variability of the SNARC effect. [less ▲]Detailed reference viewed: 111 (9 UL) Magnetic small-angle neutron scattering: beyond the particle-matrix conceptMichels, Andreas Poster (2015, September)Detailed reference viewed: 63 (2 UL) Parafermion bound states and the fractional Josephson effect in Rashba spin-orbit coupled nanowiresPedder, Christopher ; Meng, Tobias; Tiwari, Rakesh et alPoster (2015, September)Detailed reference viewed: 72 (0 UL) The influence of parents in children’s emotion regulation.Pinto Costa, Andreia ; Steffgen, Georges Poster (2015, September)Detailed reference viewed: 82 (7 UL) Fracture in augmented realityBilger, Alexandre ; Cotin, Stephane; Dequidt, Jeremie et alPoster (2015, August)Detailed reference viewed: 145 (1 UL) Self-assessment of academic competencies via a computer based tool in Luxembourg primary schoolVillanyi, Denise ; Fischbach, Antoine ; Sonnleitner, Philipp et alPoster (2015, August)Detailed reference viewed: 140 (12 UL) Universities and Research Institutes: A Comparative Historical Analysis of Scientific Productivity from 1900 to 2011Dusdal, Jennifer Poster (2015, August)Detailed reference viewed: 83 (6 UL) Raman spectroscopy as probe of nanometre-scale strain variations in grapheneNeumann, Christoph; Reichardt, Sven ; Venezuela, Pedro et alPoster (2015, July 14)Detailed reference viewed: 126 (1 UL) Finite-temperature conductance of interacting quantum wires with Rashba spin-orbit couplingSchmidt, Thomas Poster (2015, July)Detailed reference viewed: 107 (1 UL) Development and validation of a test intrument to assess basic motor qualifications in primary schoolScheuer, Claude; Bund, Andreas ; Herrmann, ChristianPoster (2015, July)Detailed reference viewed: 82 (4 UL) FEniCS in Linux ContainersHale, Jack ; Li, Lizao; Wells, Garth N.Poster (2015, June 29)We present a collection of Docker images for running FEniCS in Linux containers. With one command, a user can launch a lightweight container that provides a consistent environment for using or developing ... [more ▼]We present a collection of Docker images for running FEniCS in Linux containers. With one command, a user can launch a lightweight container that provides a consistent environment for using or developing FEniCS. Once the initial image has been fetched, 'FEniCS terminals' can be launched near-instantly. We show through a range of tests that performance within a container is to equal to that on the host system. Moreover, MPI programs can be run from inside the container, and host CPU vectorisation features can be exploited. In practice, container versions of FEniCS will be faster than user installations as the container images can be carefully tuned for performance. Live demonstrations of user and developer container use will be presented. The containers are built and hosted on Docker Hub [less ▲]Detailed reference viewed: 168 (18 UL) Impact of Limited Multi-GNSS Visibility on Vertical Land Movement EstimatesAbraha, Kibrom Ebuy ; Teferle, Felix Norman ; Hunegnaw, Addisu et alPoster (2015, June 27)The number of GNSS satellites and their geometry directly affect the quality of positioning and derived satellite products. Accordingly, the International GNSS Service (IGS) recommends GNSS antennas to be ... [more ▼]The number of GNSS satellites and their geometry directly affect the quality of positioning and derived satellite products. Accordingly, the International GNSS Service (IGS) recommends GNSS antennas to be installed away from natural and man-made surfaces and structures, which may affect the incoming signals through severe multipath or obstructions. Following these recommendations, continuous GNSS (cGNSS) stations are generally located in low multipath environments with minimal signal obstructions. However, some applications require GNSS antennas to be installed at specific locations in order to measure local processes. Hence, in support of sea level studies, cGNSS stations must be installed close to or at tide gauges in order to accurately monitor the local vertical land movements experienced by the sea level sensors. However, the environment at the tide gauge might not be optimal for GNSS observations due to the aforementioned station-specific effects, which degrade the quality of coordinate solutions.This first study investigates the impact of severe signal obstructions on long-term monitoring results by use of simulated and real observations for selected cGNSS stations, and evaluates if the use of multi-GNSS (GPS+GLONASS) constellations will benefit derived results. To investigate these effects, we implemented azimuth and elevation dependent masking in the Bernese GNSS Software version 5.2. We present our preliminary results on the impact of different obstruction scenarios and combined GPS and GLONASS solutions on coordinate and vertical land movement estimates. [less ▲]Detailed reference viewed: 212 (45 UL) Calibration of the Tide Gauge at King Edward Point, South Georgia Island, South Atlantic OceanTeferle, Felix Norman ; Hunegnaw, Addisu ; Woodworth, P. L. et alPoster (2015, June 27)In 2008 a new pressure tide gauge with Global Sea Level Observing System Number 187 was installed at King Edward Point (KEP), South Georgia Island, South Atlantic Ocean. This installation was carried out ... [more ▼]In 2008 a new pressure tide gauge with Global Sea Level Observing System Number 187 was installed at King Edward Point (KEP), South Georgia Island, South Atlantic Ocean. This installation was carried out as part of the Antarctic Circumpolar Current Levels by Altimetry and Island Measurements (ACCLAIM) programme. In 2013 the KEP Geodetic Observatory was established in support of various scientific applications including the monitoring of vertical land movements at KEP. Currently, the observatory consists of two state-of-the-art Global Navigation Satellite System (GNSS) stations with local benchmark networks. This ties all benchmarks and the tide gauge into the International Terrestrial Reference Frame 2008, and allows the establishment of a local height datum in a global height system through the use of a global gravitational model. In 2014 a tide board was added to the tide gauge, which, together with the GNSS and levelling observations, now enables a calibration of the tide gauge. This will make it possible to include the KEP tide gauge in the Permanent Service for Mean Sea Level (PSMSL) database. In this study, we will present the results from the calibration of the tide gauge using the GNSS observations from the KEP Geodetic Observatory for the period from February 2013 to present, the levelling campaigns in 2013 and 2014, and geoid undulations derived from a seamless combination of the latest Gravity Observation Combination (GOCO) 05S and Earth Gravitational Model (EGM) 2008 models. [less ▲]Detailed reference viewed: 122 (6 UL) Analysis of Global Climate Variability from Homogenously Reprocessed Ground-based GNSS MeasurementsAhmed, Furqan ; Hunegnaw, Addisu ; Teferle, Felix Norman et alPoster (2015, June 26)Detailed reference viewed: 141 (2 UL) Shared alterations in the human brain transcriptome during adult aging and in Parkinson's diseaseGlaab, Enrico ; Schneider, Reinhard Poster (2015, June 15)Aging-related biomolecular changes in the human brain are thought to be associated with an increased risk for neurodegenerative diseases. In particular, aging and Parkinson’s disease (PD) share various ... [more ▼]Aging-related biomolecular changes in the human brain are thought to be associated with an increased risk for neurodegenerative diseases. In particular, aging and Parkinson’s disease (PD) share various molecular hallmarks, including a gradual decline in dopamine synthesis and increased levels of deleted mitochondrial DNA. While some specific mechanistic links between brain aging and PD have been proposed and investigated previously, systematic analyses of shared molecular alterations at a genome-scale level are required to obtain a better understanding of the affected cellular processes and their interrelations. We present a joint analysis of high-throughput brain transcriptomics data from PD patients and unaffected individuals from different adult age groups using a statistical meta-analysis and a recently published pathway and network analysis approach. Our analyses provide statistical evidence for specific functional associations between molecular network changes in PD and aging, identify new significant joint pathway deregulations and suggest mechanistic explanations for the observed age-dependence of PD risk. [less ▲]Detailed reference viewed: 197 (26 UL) A New Datum-Controlled Tide Gauge Record for Sea Level Studies in the South Atlantic Ocean: King Edward Point, South Georgia IslandTeferle, Felix Norman ; Hunegnaw, Addisu ; Woodworth, P. L. et alPoster (2015, June 12)In 2008 a new pressure tide gauge with Global Sea Level Observing System Number 187 was installed at King Edward Point (KEP), South Georgia Island, South Atlantic Ocean. This installation was carried out ... [more ▼]In 2008 a new pressure tide gauge with Global Sea Level Observing System Number 187 was installed at King Edward Point (KEP), South Georgia Island, South Atlantic Ocean. This installation was carried out as part of the Antarctic Circumpolar Current Levels by Altimetry and Island Measurements (ACCLAIM) programme. In 2013 the KEP Geodetic Observatory was established in support of various scientific applications including the monitoring of vertical land movements at KEP. Currently, the observatory consists of two state-of-the-art Global Navigation Satellite System (GNSS) stations with local benchmark networks. In 2014 a tide board was added to the tide gauge, which, together with the measurements from the KEP Geodetic Observatory, now enables a calibration of the tide gauge. This will make it possible to include the KEP tide gauge in the Permanent Service for Mean Sea Level (PSMSL) database and make it available for future sea level studies. In this study, we will present the GNSS and levelling observations from the KEP Geodetic Observatory for the period from February 2013 to May 2015 used for the calibration of the tide gauge. While it is still too early to obtain accurate vertical land movement estimates from the GNSS data, the levelling campaigns in 2013 and 2014 indicated 7-9 mm of subsidence near the tide gauge. For the computation of the new height datum, geoid undulations derived from a seamless combination of the latest Gravity Observation Combination (GOCO) and Earth Gravitational Model (EGM) 2008 models were used. The use of this combined gravity model introduced a datum shift of approximately -24 cm compared to the previous datum. [less ▲]Detailed reference viewed: 164 (11 UL) Comment favoriser la collaboration école-famille: la boîte à outilsKerger, Sylvie ; Poncelet, Débora ; Dierendonck, Christophe Poster (2015, June 11)We presented a tool of concrete actions how to strengthen the relation between school, families and community. These concrete actions were the outcome of an action-research in Luxembourgish fundamental ... [more ▼]We presented a tool of concrete actions how to strengthen the relation between school, families and community. These concrete actions were the outcome of an action-research in Luxembourgish fundamental schools. This set of actions is not a " ready for use kit " but rather a "guide" in the transposition of experiences of a situation given to an other. [less ▲]Detailed reference viewed: 188 (1 UL) Non-integral torsion and 1-dimensional singular sheaves in the Simpson moduli spaceLeytem, Alain Poster (2015, June 01)In my thesis I am interested in the Simpson moduli spaces $M_{am+b}$ of semi-stable sheaves on $P_2$ with linear Hilbert polynomial $am+b$ where $a,b\in N$. More precisely I want to know which ones and ... [more ▼]In my thesis I am interested in the Simpson moduli spaces $M_{am+b}$ of semi-stable sheaves on $P_2$ with linear Hilbert polynomial $am+b$ where $a,b\in N$. More precisely I want to know which ones and “how many” of them are locally free on their support. I also started a study apart to analyze how torsion of a module behaves in the non-integral case. Apparently this has not been done in detail yet. [less ▲]Detailed reference viewed: 90 (11 UL) Dynamic change of host gastrointestinal microbiome and immune status in relation to mucosal barrier effects during chemotherapy and immune ablative intervention in humans.Kaysen, Anne ; Buschart, Anna ; May, Patrick et alPoster (2015, June)Detailed reference viewed: 103 (5 UL) The Eletrophysiology of Prepulse InhibitionDierolf, Angelika ; Blumenthal, Terry; Schächinger, Hartmut et alPoster (2015, June)The acoustic startle response is decreased by a prepulse occurring 30-500 ms earlier. This prepulse inhibition (PPI) is interpreted in terms of the Interruption and Protection hypotheses, in which startle ... [more ▼]The acoustic startle response is decreased by a prepulse occurring 30-500 ms earlier. This prepulse inhibition (PPI) is interpreted in terms of the Interruption and Protection hypotheses, in which startle responding interrupts prepulse processing, and PPI indicates the degree to which prepulse processing is protected from that interruption. We evaluated this hypotheses by measuring startle responding and evoked potentials (N1, P2) to both prepulse and startle stimuli under different attentional conditions (Attend Startle, Attend Prepulse, Ignore Both). 192 trials were presented in randomized order: Startle Alone (105dB noise), Prepulse Alone (70dB noise), and prepulse+startle stimuli with a stimulus onset asynchrony (SOA) of 120 (PPI120) or 500 ms (PPI500). 36 participants, randomly assigned to the three attention conditions, pressed a key to the startle or to the pre-pulse or did not respond. A 32-channel EEG and eyeblink EMG were measured. Independent of the attentional conditions, the EMG startle response was decreased by a pre-pulse at both SOAs, illustrating PPI. Prepulse N1/P2 amplitude was identical for the Prepulse Alone, PPI120, and PPI500 stimuli independent of the attentional conditions, demonstrating protection of primary sensory prepulse processing. N1/P2 potentials to the startle stimulus were affected by the SOAs and the attentional conditions, suggesting a change in startle processing by both variables. The results suggest a complete protection of prepulse processing. The reduced N1/P2 amplitudes to the startle stimulus at both SOAs suggest that the eliciting properties of the startle stimulus are decreased by the prepulse. [less ▲]Detailed reference viewed: 12 (0 UL) Visuelle Blockade durch hypnotische SuggestionDierolf, Angelika ; Kerscher, Lisa; Miltner, Wolfgang et alPoster (2015, June)Hypnotherapie nutzt Trance und Suggestion im therapeu- tischen Kontext erfolgreich und mit empirisch belegter Wirksamkeit, z.B. zur Therapie von Süchten, Belastungsstörungen und Schmerzen. Allerdings ... [more ▼]Hypnotherapie nutzt Trance und Suggestion im therapeu- tischen Kontext erfolgreich und mit empirisch belegter Wirksamkeit, z.B. zur Therapie von Süchten, Belastungsstörungen und Schmerzen. Allerdings existieren kaum ex- perimentell gesicherte Erkenntnisse über die neurobiolo- gischen Mechanismen des Trancezustandes. Noch weniger ist bekannt, wie Suggestion die Informationsverarbeitung externer Reize so verändert, dass sie eine andere Quali- tät erhalten. Während erste Studien die neurobiologische Mechanismen von hypnotische Analgesie untersucht ha- ben, ist bisher kaum etwas über andere Sinnesmodalitäten bekannt. Die hier präsentierte Studie behandelt den Ein- fluss von hypnotisch suggerierter visueller Blockade auf die visuelle Wahrnehmung. Versuchspersonen wurden mittels Harvard Group Scale of Hypnotic Susceptibility und Stanford Hypnotic Susceptibility Scale auf ihre hyp- notische Suggestibilität getestet. 19 hochsuggestible Per- sonen (Jena) bzw. 12 Versuchspersonen (Trier: 4 niedrig-, 4 mittel-, 4 hochsuggestible) bearbeiteten zwei Mal einen visuellen 3 Stimulus Oddball, einmal mit und einmal ohne hypnotische Trance und hypnotischer Suggestion in aus- balancierter Reihenfolge. Für die hypnotische Suggestion wurden die Probanden zunächst in eine Entspannungs- trance gesprochen; anschließend wurde ihnen suggeriert, dass ein Brett ihre Sicht auf den Monitor blockiert. Die Ergebnisse zeigen, dass hochsuggestible Personen unter hypnotischer Trance mit suggerierter visueller Blockade weniger Zielreize zählten. Damit übereinstimmend, zei- gen die ereigniskorrelierten Potentiale der Hochsugges- tiblen eine deutliche Reduktion der parietalen P3 auf den Zielreiz. Somit beeinflusste die hypnotische Suggestion unter Trance nicht die sensorische Wahrnehmung der Reize, sondern veränderte spezifisch die Aufmerksamkeit und Bewertung des Zielreizes. Diese Replikationsstudien geben einen ersten Hinweis über die Wirkungsweise und neuronale Mechanismen der Hypnose und Suggestion und ihre Wechselwirkung mit Suggestibilität, einem sta- bilen Persönlichkeitskonstrukt. [less ▲]Detailed reference viewed: 16 (2 UL) Learning movement phases during early stages of learningGhorbani, Saeed; Bund, Andreas Poster (2015, June)Detailed reference viewed: 76 (2 UL) Early dynamics of the gastrointestinal microbiome in infants at risk of metabolic disease in adulthood.Wampach, Linda ; Buschart, Anna ; Hogan, Angela et alPoster (2015, June)Detailed reference viewed: 74 (3 UL) Functional connectivity and structural analyses in the bilingual brain: implications for arithmetic.Van Rinsveld, Amandine ; Dricot, Laurence; Guillaume, Mathieu et alPoster (2015, June)Do bilinguals use the same brain networks than monolinguals when they solve arithmetic problems? We investigated this question by using resting-state functional connectivity and cortical thickness ... [more ▼]Do bilinguals use the same brain networks than monolinguals when they solve arithmetic problems? We investigated this question by using resting-state functional connectivity and cortical thickness measurements. Recent studies highlighted differences of functional connectivity (e.g. Grady et al., 2015) and of brain structure (e.g. Klein et al., 2014) between bilinguals and monolinguals. However, no study so far has linked these differences to arithmetic problem solving, a cognitive skill that may at least partially rely on language processing. Our study population was composed of carefully selected German-French bilinguals (N = 20) who acquired each language at the same age, leading to high proficiency levels in both languages. These bilinguals all attended university in their second language at the time of the experiment, namely French. Therefore we selected a control group of French-speaking monolinguals (N = 12). Structural and functional images of brain activity were collected using a 3T MRI scanner. Functional scans of resting-state were acquired during a 6-minute session, with eyes closed. A 3D T1-weighted data set encompassing the whole brain was acquired to provide detailed anatomy (1 mm3), which was used both for the co-registration of functional data and for morphometric analyses. Prior to the scanning session, all participants took a behavioral test measuring their arithmetic skill. For the resting-state part of the study, we generated spheres based on ROIs reported in the literature as magnitude manipulation- and language-related areas during arithmetic problem solving (Klein et al. 2013), and addition-related areas reported in a recent meta-analysis (Arsalidou & Tayor, 2011). We used these spheres as seed regions for the analyses. We correlated resting activations between these regions and compared these correlations in bilinguals versus monolinguals. Results showed significantly higher correlations between the three seed regions in monolinguals than in bilinguals (all ts > 2.306; ps < .05), suggesting that regions used to solve arithmetic problems form a different network in bilinguals than in monolinguals. To control for general differences between both populations, we also created two spheres in areas not specifically related to neither arithmetic nor language regions. There were no significant differences between groups in terms of correlations of these regions with resting-state activations. These results suggest that the differences observed in arithmetic problem solving regions could not account for by general differences between groups. In the second part of the study, we aimed at verifying whether the differences in functional connectivity we observed between bilinguals and monolinguals coincide with structural brain differences. We measured and compared cortical thickness in both groups. Then we compared the correlations between cortical thickness and arithmetic skill in both groups (considering differences with corrected p < .001). Cortical thickness of areas commonly associated to language or number processing correlated differently with arithmetic skill as a function of the group: Higher cortical thickness of left pars triangularis, bilateral superior parietal gyri and precuneus positively correlated with arithmetic skill in monolinguals but negatively correlated with arithmetic skill in bilinguals. These results highlight that there are different relations between brain structure and arithmetic skills in bilinguals and monolinguals. In conclusion the current study provides new evidence for differences between bilinguals’ and monolinguals’ brain networks engaged in arithmetic problem solving, even without any arithmetic task during the data acquisition. These findings based on functional connectivity and brain structure analyses also reveal the general involvement of language in arithmetic problem solving in bilingual as well as non-bilingual individuals. [less ▲]Detailed reference viewed: 146 (8 UL) Coping with Bullying questionnaire: Validation of the German adaptationPinto Costa, Andreia ; Steffgen, Georges ; Skrzypiec, GracePoster (2015, May 21)Detailed reference viewed: 113 (6 UL) Control of Flame Spray Pyrolysis synthesis of Li4Ti5O12: Experimental and Computational studyTsikourkitoudi, Vasiliki; Gavriliadis, Panagiotis; Bourantas, Georgios et alPoster (2015, May 14)Lithium titanate (Li4Ti5O12, LTO) is a promising anode material for the next generation of lithium ion batteries. Its physical properties and morphology (which consequently affect its electrochemical ... [more ▼]Lithium titanate (Li4Ti5O12, LTO) is a promising anode material for the next generation of lithium ion batteries. Its physical properties and morphology (which consequently affect its electrochemical performance) highly depend on its synthesis method. Flame spray pyrolysis (FSP) is an attractive process for the controlled one-step synthesis of functional multicomponent oxides from low cost precursors. The main aim of this study is to control the growth process of LTO by FSP in order to maintain the desired particle properties. LTO nanoparticles of different sizes are synthesized by variation of the FSP processing conditions and characterized accordingly. Numerical simulations based on Population Balance Models are also implemented in order to investigate the evolution of primary and agglomerate particle growth. [less ▲]Detailed reference viewed: 354 (1 UL) Inhibitory control influences number-space associations in atypical young adults with ADHDGeorges, Carrie ; Hoffmann, Danielle ; Schiltz, Christine Poster (2015, May)Evidence for number-space associations comes from the spatial-numerical association of response-codes (SNARC) effect, consisting in faster reaction times (RTs) to small/large digits with the left/right ... [more ▼]Evidence for number-space associations comes from the spatial-numerical association of response-codes (SNARC) effect, consisting in faster reaction times (RTs) to small/large digits with the left/right hand respectively. The SNARC effect is, however, characterized by high inter-individual variability, depending amongst others on inhibition capacities. Hoffmann et al. (2014) showed that individuals more sensitive to the interference of irrelevant information in the classical color-word Stroop task displayed stronger number-space associations. This relation was most pronounced in elderly, but did not reach significance in young healthy adults. To determine whether the negligible correlation in the young resulted from their near ceiling performances on the color-word Stroop task, we recruited young adults featuring atypically weak and variable inhibitory control. Our study population consisted of individuals (n=32; 18 females; age=27.28 years) formally diagnosed with attention-deficit/hyperactivity disorder (ADHD; n=4) and/or displaying symptoms consistent with ADHD according to the Adult ADHD Self-Report Scale (ASRS-v1.1; n=29). Within this population, a significant negative correlation (r=-0.45; p=0.009) could be observed between the parity SNARC effect (mean slope=-14.17; p<0.001) and Stroop interference, as indexed by the color-word Stroop ratio score (i.e. the difference in RTs between the color-word interference condition and the color naming condition divided by the RT in the word reading condition; mean ratio=0.82). The relationship remained significant even after controlling for arithmetic performance and general processing speed, as assessed using the arithmetic battery (Rubinsten & Henik, 2005; Shalev et al., 2001; mean accuracy=84.61%) and a speeded matching-to-sample task respectively (mean RT=671.86ms; r=-0.47; p=0.008). Our findings thus reveal that stronger number-space associations are associated with weaker Stroop inhibitory control in young adults with atypical attentional profiles, thereby further confirming the similarities between SNARC effects and Stroop-like interference effects. [less ▲]Detailed reference viewed: 127 (6 UL) Neural correlates of arithmetic problem solving in bilinguals: an fMRI study.Van Rinsveld, Amandine ; Dricot, Laurence; Guillaume, Mathieu et alPoster (2015, May)Detailed reference viewed: 116 (1 UL) Emotion regulation and depression in parents of children with ASDPinto Costa, Andreia ; Steffgen, Georges Poster (2015, May)Detailed reference viewed: 111 (6 UL) A Multi-Year Combination of Tide Gauge Benchmark Monitoring (TIGA) Analysis Center ProductsHunegnaw, Addisu ; Teferle, Felix Norman Poster (2015, April 12)In 2013 the International GNSS Service (IGS) Tide Gauge Benchmark Monitoring (TIGA) Working Group (WG) started their reprocessing campaign, which proposes to re-analyze all relevant Global Positioning ... [more ▼]In 2013 the International GNSS Service (IGS) Tide Gauge Benchmark Monitoring (TIGA) Working Group (WG) started their reprocessing campaign, which proposes to re-analyze all relevant Global Positioning System (GPS) observations from 1994 to 2013. This re-processed dataset will provide high quality estimates of land motions, enabling regional and global high-precision geophysical/geodetic studies. Several of the individual TIGA Analysis Centres (TACs) have completed processing the full history of GPS observations recorded by the IGS global network, as well as, many other GPS stations at or close to tide gauges, which are available from the TIGA data centre at the University of La Rochelle (www.sonel.org). Following the recent improvements in processing models and strategies, this is the first complete reprocessing attempt by the TIGA WG to provide homogeneous position time series. We report a first multi-year weekly combined solutions from the TIGA Combination Centre (TCC) at the University of Luxembourg (UL) using two independent combination software packages: CATREF and GLOBK. These combinations allow an evaluation of any effects from the combination software and of the individual TAC parameters and their influences on the combined solution. Some major results of the UL TIGA multi-year combinations in terms of geocentric sea level changes will be presented and discussed. [less ▲]Detailed reference viewed: 218 (14 UL) Optical characterization of solution based synthesis of Cu2SnS3 for photovoltaic applicationsDe Wild, Jessica ; Robert, Erika ; Dale, Phillip Poster (2015, April)Detailed reference viewed: 129 (6 UL) Hydrokinetic Micro-Power Generation in Small Rivers - a New ApproachNorta, David Peter Benjamin ; Ramanathan, Sriram; Sachau, Jürgen et alPoster (2015, March 25)The so called German electrical “Energiewende” is mainly based on the installation of solar photovoltaic and wind energy converters as the main new renewable European generation resources. The third ... [more ▼]The so called German electrical “Energiewende” is mainly based on the installation of solar photovoltaic and wind energy converters as the main new renewable European generation resources. The third renewable energy resource, the hydropower has been already developed within the last decades and grew not significantly in the last years. Since some years the development of smaller hydrokinetic turbines increased. The smaller size of some hydrokinetic turbines enables new, unused sites to be harnessed in smaller rivers. The paper deals with the key specifications of hydrokinetic turbines and their influence on a villages’ energy supply. It introduces the concept of a turbine with variable immersion depths to exploit also locations with a varying water level. Based on historical hydrological data a propeller and oscillating hydrofoil type of hydrokinetic turbine are compared, it was found that the variable immersion depths increases the energy harvest. Furthermore, it is shown that in a generation portfolio of hydrokinetic and solar power plants an average Luxembourgish household theoretically renewable supplied has to exchange less energy with the power grid, the higher its share of hydrokinetic generation is. [less ▲]Detailed reference viewed: 208 (12 UL) Calibration of the Tide Gauge at King Edward Point, South Georgia IslandTeferle, Felix Norman ; Hunegnaw, Addisu ; Woodworth, P L et alPoster (2015, March 12)After initial sea level observations in the 1950s, a new pressure tide gauge (Global Sea Level Observing System 187) was installed at King Edward Point (KEP), South Georgia Island, British Overseas ... [more ▼]After initial sea level observations in the 1950s, a new pressure tide gauge (Global Sea Level Observing System 187) was installed at King Edward Point (KEP), South Georgia Island, British Overseas Territories in the South Atlantic Ocean, in 2008. This was car-ried out as part of the ACCLAIM (Antarctic Circumpolar Current Levels by Altimetry and Island Measurements) programme. In 2013 the KEP Geodetic Observato-ry was established in support of various geoscience applications including the monitor-ing of vertical land movements at KEP. Currently, the observatory consists of two state-of-the-art GNSS stations with local benchmark networks, allowing the height determina-tions from the GNSS antennas to be transferred to the tide gauge and forming a height reference within the International Terrestrial Reference Frame. Finally in 2014, a tide board was added to the tide gauge, which, together with the GNSS and levelling obser-vations, now allows the calibration of the tide gauge. In this study, we will present the results from the calibration of the tide gauge using the GNSS observations from the KEP Geodetic Observatory for the period from February 2013 to present, the levelling campaigns in 2013 and 2014, and geoid undulations de-rived from a seamless combination of the latest GOCO and EGM2008 gravity models. [less ▲]Detailed reference viewed: 101 (11 UL) Assessing IT Security Standards Against the Upcoming GDPR for Cloud SystemsBartolini, Cesare ; Gheorghe, Gabriela ; Giurgiu, Andra et alPoster (2015, March 11)This work in progress aims at identifying a mapping between the current security standards (in particular, but not limited to, ISO 27001-2013) and the upcoming regulations in data protection. The aim is ... [more ▼]This work in progress aims at identifying a mapping between the current security standards (in particular, but not limited to, ISO 27001-2013) and the upcoming regulations in data protection. The aim is to find an overlap between the requirements for data protection and the existing security standards, to measure the gap that a business has to cross (and consequently an estimate of the expenses that it must sustain) to achieve compliance with the GDPR. [less ▲]Detailed reference viewed: 2028 (46 UL) 11,8-100% Rural Renewable Energy and Power Supply and its Influence on the Luxembourgish Power SystemNorta, David Peter Benjamin ; Winkler, Christoph; Sachau, Jürgen et alPoster (2015, March 10)Introduction; Currently, the majority of countries tries to reduce their dependency on fossil fuels by the introduction of renewable resources in their energy systems. In the following the relatively ... [more ▼]Introduction; Currently, the majority of countries tries to reduce their dependency on fossil fuels by the introduction of renewable resources in their energy systems. In the following the relatively small Luxembourgish electricity system is analysed (0.55 Mio Inhabitants). Current power-system-models mainly focus on larger systems, due to the unavailability of specific consumption-data. Prices and effects on the Luxembourgish power system of different supply scenarios for rural-private households are analysed. Methodology; A linear optimisation for the minimum-cost of the power-supply of all villages with the following renewable energy resources: wind- (max.100kW), solar-PV- and hydrokinetic-power is made. The electricity-demand scales with the number of inhabitants and agricultural-consumers. The wind-power-potential differs with the location of the village. The solar-radiation is assumed to be the equal over the country, due to the small size of approximately 80 by 50 km. The hydrokinetic turbines complete the supply where a village is located close to a river. Results; The minimum cost of the specific village power-supply is the result of the optimization. The installation- and maintenance-cost of each renewable technology are considered. The whole number of rural Luxembourgish private households is considered and their power contribution to the system is estimated for different renewable energy supply scenarios, namely from 11,8% to 100% renewable-energy-scenarios. For each scenario the power exchanged from the village to the grid is calculated in 15-min-steps for 9-years, the amount differs widely with the amount of applied technologies. Discussion; Due to the high share of imported electricity of about 80% in the recent years, every consideration of national power generation does not harm the supply security. Conclusion; Luxembourg is a good model country to analyse the high share of distributed, renewable generators, due to its structure of rural and civic regions and their effects on a central European region with a high electricity consumption. [less ▲]Detailed reference viewed: 1153 (12 UL) Early dynamics of the gastrointestinal microbiome in infants at risk of metabolic disease in adulthoodWampach, Linda ; Buschart, Anna ; Hogan, Angela et alPoster (2015, March)Detailed reference viewed: 84 (0 UL) Changes in the human gastrointestinal microbiome during cancer treatmentsKaysen, Anne ; Heintz, Anna ; Lebrun, Laura et alPoster (2015, March)Detailed reference viewed: 99 (3 UL) Inhibitory Control Influences the SNARC Effect in Tasks without Explicit Reference to Numerical MagnitudeGeorges, Carrie ; Hoffmann, Danielle ; Schiltz, Christine Poster (2015, March)Evidence for number-space associations comes from the spatial-numerical association of response-codes (SNARC) effect, consisting in faster reaction times to small/large digits with the left/right hand ... [more ▼]Evidence for number-space associations comes from the spatial-numerical association of response-codes (SNARC) effect, consisting in faster reaction times to small/large digits with the left/right hand respectively. Although the SNARC effect has now been extensively replicated, it is characterized by high inter-individual variability (Wood et al., 2008). For instance, it has been shown to depend on inhibitory control as indexed by the color Stroop effect in the elderly, with individuals having weaker inhibitory control displaying stronger SNARC effects (Hoffmann et al., 2014). Apart from these well-documented inter-individual differences, number-space associations are also influenced by intra-individual factors. Georges et al. (2014) found that in a population of healthy young university students (n=85, 39 females, mean age=23.44 years), the SNARC effect was qualitatively different within single individuals depending on the number-processing task that they performed. While the strength of the SNARC effects were related in a parity and color judgment task (parity slope=-11.58; color slope=-6.79; r=0.36, p=0.001), as well as in the parity and a magnitude comparison task (magnitude slope=-6.98; r=0.36, p=0.001), no relation could be observed between number-space associations in the color and magnitude tasks (r=0.18, p=0.11). These findings indicate that two distinct factors seem to account for the variance related to number-space associations observed during the three tasks. In the present study, we built on these findings while investigating how inhibitory control influences variance in the SNARC effect observed during different numerical tasks. To this aim, we performed a principle component analysis followed by varimax rotation to combine the color and parity SNARC effects (i.e. number-space associations in tasks without explicit reference to numerical magnitude) and the parity and magnitude SNARC effects (i.e. number-space associations in tasks involving semantic number processing) into single factors (color-parity-SNARC and parity-magnitude-SNARC factors respectively). We then investigated how these two extracted SNARC factors were influenced by inter-individual characteristics such as inhibitory control. Inhibitory control was evaluated in a task that involved responding to the color (green or red) of a centrally presented arrow pointing either in the left or right direction by pressing on the left or right hand-side. To get a single inhibitory control measure for each individual, we calculated inverse efficiency scores on compatible and incompatible trials and computed performance differences between those two conditions. The scores of the extracted parity-color-SNARC factor significantly correlated with the inhibitory control measure (μ=109.98ms, SD=85.82ms; r=-0.26, p=0.02), while no relation was observed between inhibitory control and the parity-magnitude SNARC factor scores (r=-0.1, p=0.42). This suggests that individuals with better inhibitory control (i.e. smaller performance differences between compatible and incompatible trials) displayed weaker SNARC effects only in number-processing tasks that required the suppression of an irrelevant numerical (magnitude) code for successful task completion. Number-space associations are characterized by high inter- and intra-individual variability. We determined how the SNARC effect observed in tasks with and without explicit numerical magnitude processing related to inhibitory control. Individuals with better inhibitory control displayed weaker SNARC effects only in tasks requiring the suppression of an irrelevant numerical magnitude. [less ▲]Detailed reference viewed: 206 (6 UL) Integrated omics analyses of the human gut microbiome in a multiplex family study of type 1 diabetes mellitus.Buschart, Anna ; May, Patrick ; Laczny, Cedric Christian et alPoster (2015, March)Detailed reference viewed: 102 (1 UL) Does body motion influence arithmeticSosson, Charlotte ; Guillaume, Mathieu ; Schuller, Anne-Marie et alPoster (2015, March)« Embodiment theory » proposes that bodily actions impact the quality of mental representations. Two recent studies (Loetscher, et al., 2008; Hartmann, et al., 2011) have shown that leftward movements of ... [more ▼]« Embodiment theory » proposes that bodily actions impact the quality of mental representations. Two recent studies (Loetscher, et al., 2008; Hartmann, et al., 2011) have shown that leftward movements of the head or the body enhanced small number generation while rightward movements increased the generation of larger numbers. The present study aimed to investigate the influence of passive whole-body movement on arithmetic-problem solving. Our design was elaborated in the context of operational momentum effect (Pinhas, & Fischer, 2008; McCrink, et al., 2007). In the domain of arithmetic this effect refers to the fact that outcomes of additions are systematically estimated to be larger than the outcomes of subtractions and vice versa for subtraction (Knops, et al., 2009; Lindemann, et al., 2011). Interestingly this bias is present for non-carry but not for carry problems. To account for the operational momentum effect it has been proposed that subtractions involve an attentional motion towards the left of the mental number line and additions towards the right inducing the above-mentioned under- and over-estimation. In line with these findings we reasoned that passive body motion might orient attention towards the side of the body movement and consequently enhance the attentional shifts supposed to underlie the operational momentum effects that occur during numerical tasks. In the present paradigm participants were sitting blindfolded on a swivel chair. While they were rotated alternatively 180° towards the left and the right with a pace of 49°/sec., they were asked to orally solve different kinds of calculations presented via headphones. Calculations consisted in additions and subtractions (first operand: from 1 to 98; second operand: from 1 to 13 and results: from 3 to 89) that were composed of carry and non-carry problems and had different levels of difficulty (easy: results from 1 to 9; medium: results from 11 to 19; difficult: from 21 to 89). Contrary to our predictions, results indicate that the direction of passive body motion (i.e. leftwards vs. rightwards) did not influence arithmetic performance. Indeed the ANOVA for repeated measures with the factor Motion (left, right), Problem type (carry, non-carry) and Operation type (addition, subtraction) revealed no main effect of motion (F(1,33)= 0,856, p=0.361). In contrast we observed a main effect of Problem type (F(1,33)=29.065, p<0.001), a main effect of Operation type (F(1,33)= 20,721, p<0.001) and a significant interaction of Problem type x Operation type (F(1,30)=5.605,p=0.024). As would be expected from the results observed with classical stationary experiment settings, participants were more accurate while solving additions than subtractions and made less errors with non-carry problems. Moreover the carry effect was larger for subtractions than additions. Analyses of the reaction times led to the same conclusions. These results indicate that orally solving arithmetic problems is not influenced by the direction (leftwards vs. rightwards) of passive rotary body-motion. This finding contrasts with previous observations that active head movements and/or passive translational movements impacts numerical task performance. Future studies which systematically contrast the effects of the different movement types on numerical tasks should help to clarify this discrepancy. [less ▲]Detailed reference viewed: 75 (2 UL) The influence of Brownian motion on sheared nanocomposites: New experimental results and a revision of Peclet-time as a characteristic time scaleDannert, Rick ; Sanctuary, Roland ; Baller, Jörg Poster (2015, March)Detailed reference viewed: 71 (3 UL) IMPROVING THE RELIABILITY OF A TWO-STEPS DYNAMIC DEMAND ESTIMATION APPROACH BY SEQUENTIALLY ADJUSTING GENERATIONS AND DISTRIBUTIONSCantelmo, Guido ; Viti, Francesco ; Cipriani, Ernesto et alPoster (2015, January 16)Detailed reference viewed: 91 (14 UL) A force-constant model of graphene for conductivity calculationsPereira Coutada Miranda, Henrique ; Wirtz, Ludger Poster (2015, January)Transport in graphene is strongly limited by the electron-phonon interaction. Accurate description of the phonon dispersion relations is essential for the study of this interaction. Using current state-of ... [more ▼]Transport in graphene is strongly limited by the electron-phonon interaction. Accurate description of the phonon dispersion relations is essential for the study of this interaction. Using current state-of-the-art ab initio density-functional theory plane-wave codes, we are limited to systems with few atoms. For larger systems (e.g., nanotubes, nanoribbons), accurate semi-empircal models are needed. We have developed a force constant model for the phonon dispersion of graphene. Our implementation can include a large number of neighbours, which allows us to simulate accurately long-range interaction effects. As shown in previous publications it is possible to reproduce the phonon dispersion frequencies of graphene with a 4th nearest neighbours force constant model. However, some features can only be captured using long-range interactions (Kohn-anomalies, certain phonon eigenvectors). Using an ab initio phonon dispersion calculated with DFPT as reference, we show the nature of the long-range interactions and explore different ways to include them in our semi-empirical model. We also study the dependence of the force constants on charge and strain. Work in collaboration with Jing Li, Yann-Michel Niquet, Luigi Genovese, and Ivan Duchemin from L_Sim, SP2M, UMR-E CEA/UJF-Grenoble 1, INAC, Grenoble, France and Christophe Delerue from IEMN - Dept. ISEN, UMR CNRS 8520, Lille, France [less ▲]Detailed reference viewed: 264 (11 UL) Horizontal tuning of face-specific processing from childhood to elderly adulthood.Goffaux, Valerie; Poncin, Aude; Schiltz, Christine Poster (2015)Face recognition in adults recruits specialised mechanisms that are selectively driven by horizontal information. This range indeed conveys the most optimal and stable cues to identity. Whether the ... [more ▼]Face recognition in adults recruits specialised mechanisms that are selectively driven by horizontal information. This range indeed conveys the most optimal and stable cues to identity. Whether the horizontal tuning of adult face recognition reflects horizontal bias already active at infancy and/or whether it also results from the extensive experience acquired with faces over the lifespan is elusive. Answering these questions is crucial to determine the information constraining the developmental specialisation of core visual functions such as face perception. Participants aged between 6 and 74 years matched unfamiliar faces that were filtered to retain information in narrow ranges centred on horizontal (H), vertical (V), or both orientation ranges (HV). H and V ranges respectively maximize and minimize the recruitment of face-specific mechanisms (Goffaux and Dakin, 2010). Stimuli were presented at upright and inverted planar orientations and the face inversion effect (FIE; i.e., better performance for upright than inverted faces) was taken as a marker of face-specific processing. In H and HV conditions, FIE size increased linearly from childhood to adulthood, manifesting the progressive specialization of face perception. FIE emerged earlier when processing HV than H faces (FIE onset: 6 and 12 years, respectively) indicating that until 12 years horizontal information is necessary but not sufficient to trigger face-specialised processing. Partial correlations further showed that FIE development in HV condition was not fully explained by FIE development in H condition. Besides a progressive maturation of horizontal processing, the specialization of the face processing system thus also depends on the improved integration of horizontal range with other orientations. In contrast, FIE size was small and stable when processing V information. These results show that the face processing system matures over the life span based on the refined encoding of horizontally-oriented (upright) face cues. Meeting abstract presented at VSS 2015. [less ▲]Detailed reference viewed: 105 (0 UL) Assessing the cerebral correlates of number processing with Fast Periodic Visual StimulationGuillaume, Mathieu ; Mejias Vanslype, Sandrine ; Rossion, Bruno et alPoster (2015)Detailed reference viewed: 63 (6 UL) Assessing subjective university success with the Subjective Academic Achievement Scale (SAAS).Stadler, Matthias ; Kemper, Christoph ; Greiff, Samuel Poster (2015)Detailed reference viewed: 155 (0 UL) Tablet-based visuo-spatial training tool for preschoolersCornu, Véronique ; Pazouki, Tahereh; Martin, Romain Poster (2015)In the context of numerical development, visuo-spatial skills are are assumed to provide an early foundation for later mathematical learning. First evidence for positive effects of visuo-spatial training ... [more ▼]In the context of numerical development, visuo-spatial skills are are assumed to provide an early foundation for later mathematical learning. First evidence for positive effects of visuo-spatial training on numerical performance in children has recently been provided (Cheng & Mix, 2014). In sum, visuo-spatial training can be considered as being a promising approach for enhancing young children’s early math performance and providing them with a sound foundation for later mathematical learning. Nevertheless, rarely any visuo-spatial training material is currently available for the preschool setting. Based on this, we have developed a tablet-based visual-spatial intervention tool for preschoolers. This tool has been specifically designed for the school setting and should be administered by a teacher to a whole classroom or a small group of children. In terms of design, the tablet workspace is conceptualized as an electronic blackboard being used in combination with external material such as booklets. A multitude of tasks targeting different levels of visual-spatial abilities have been developed and will be presented. This tool is currently being scientifically evaluated in the context of a first classroom based intervention study in Luxembourgish kindergartens (N=125). In a pretest-posttest design, we are evaluating changes in visuo-spatial abilities and potential transfer effects on numerical abilities in the intervention group (n=68) compared to a “teaching as usual” control group (n=57). The intervention is carried out twice per week (20 minutes per session) over a period of 10 weeks. Only near transfer effects could be observed, but no further transfer to non-trained transformation skills and early math abilities. Training effects were thus restricted to skills that have been specifically targeted during training sessions. [less ▲]Detailed reference viewed: 168 (32 UL) PraxisBüro BSSEBöwen, Petra ; Dujardin, Céline ; Romberg, KathrinPoster (2015)Detailed reference viewed: 119 (11 UL) Variables associated to aging well in poor Peruvian older adultsTournier, Isabelle ; Olivera, JavierPoster (2015)Detailed reference viewed: 62 (0 UL) Effect of Nutrition on Daily Life Activities According to Gender in Poor Older Peruvian AdultsTournier, Isabelle ; Olivera Angulo, JavierPoster (2015)Detailed reference viewed: 56 (2 UL) Higher response rates at the expense of validity? Consequences of the implementation of the ‘forced response‘ option within online surveysDecieux, Jean Philippe Pierre ; Mergener, Alexandra; Neufang, Kristina et alPoster (2015)Due to the low cost and the ability to reach thousands of people in a short amount of time, online surveys have become well established as a source of data for research. As a result, many non ... [more ▼]Due to the low cost and the ability to reach thousands of people in a short amount of time, online surveys have become well established as a source of data for research. As a result, many non-professionals gather their data through online questionnaires, which are often of low quality due to having been operationalised poorly (Jacob/Heinz/Décieux 2013; Schnell/Hill/Esser 2011). A popular example for this is the ‘forced response‘ option, whose impact will be analysed within this research project. The ‘forced response’ option is commonly described as a possibility to force the respondent to give an answer to each question that is asked. In most of the online survey computer software, it is easily achieved by enabling a checkbox. Relevance: There has been a tremendous increase in the use of this option, however, the inquirers are often not aware of the possible consequences. In software manuals, this option is praised as a strategy that significantly reduces item non-response. In contrast, research studies offer many doubts that counter this strategy (Kaczmirek 2005, Peytchev/Crawford 2005, Dillman/Smyth/Christian 2009, Schnell/Hill/Esser 2011, Jacob/Heinz/Décieux 2013). They are based on the assumption that respondents typically have plausible reasons for not answering a question (such as not understanding the question; absence of an appropriate category; personal reasons e.g. privacy). Research Question: Our thesis is that forcing the respondents to select an answer might cause two scenarios: - Increasing unit non-response (increased dropout rates) - Decreasing validity of the answers (lying or random answers). Methods and Data: To analyse the consequences of the implementation of ‘forced response’ option, we use split ballot field experiments. Our analysis focuses especially on dropout rates and response behaviour. Our first split ballot experiment was carried out in July 2014 (n=1056) and we have planned a second experiment for February 2015, so that we will be able to present our results based on strong data evidence. First results: If the respondents are forced to answer each question, they will - cancel the study earlier and - choose more often the response category “No” (in terms of sensitive issues). [less ▲]Detailed reference viewed: 288 (34 UL) BT Quantization on K3 SurfacesCastejon-Diaz, Hector Poster (2015)Detailed reference viewed: 93 (9 UL) Assessment of BLT Tide Gauge Benchmark Monitoring (TIGA) repro2 solutionsHunegnaw, Addisu ; Teferle, Felix Norman Poster (2015)In 2013 the International GNSS Service (IGS) Tide Gauge Benchmark Monitoring (TIGA) Working Group (WG) started their reprocessing campaign, which proposes to re-analyze all relevant Global Positioning ... [more ▼]In 2013 the International GNSS Service (IGS) Tide Gauge Benchmark Monitoring (TIGA) Working Group (WG) started their reprocessing campaign, which proposes to re-analyze all relevant Global Positioning System (GPS) observations from 1994 to 2013. This re-processed dataset will provide high quality estimates of land motions, enabling regional and global high-precision geophysical/geodetic studies. Several of the individual TIGA Analysis Centres (TACs) have completed processing the full history of GPS observations recorded by the IGS global network, as well as, many other GPS stations at or close to tide gauges, which are available from the TIGA data centre at the University of La Rochelle (www.sonel.org). Following the recent improvements in processing models and strategies, this is the first complete reprocessing attempt by the BLT TIGA Analysis centre to provide homogeneous position time series. We report the quality of the multi-year daily solutions from the consortium of the British Isles continuous GNSS Facility (BIGF) and the University of Luxembourg TIGA Analysis Centres (BLT) based on the Bernese GNSS Software Version 5.2 using a double difference (DD) network processing strategy. [less ▲]Detailed reference viewed: 63 (7 UL) Predicting biogas production rate with Black/Grey-Box-Models based on artificially produced datasetsHien, Sebastian ; Hansen, Joachim Poster (2015)Detailed reference viewed: 91 (19 UL) Mother and father competence and child attachment representations in a sample of internationally adopted adolescentsMolina, Paola; Casonato, Marta; Ongari, Barbara et alPoster (2015)Detailed reference viewed: 67 (4 UL) Evaluer les connaissances des enseignants en algèbre élémentaire : les apports croisés des recherches centrées sur l'apprentissage et l'enseignement de l'algèbreDemonty, Isabelle ; Vlassis, Joëlle Poster (2015)Detailed reference viewed: 65 (2 UL)