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See detailA global description of the fine Simpson moduli space of 1-dimensional sheaves supported on plane quartics
Iena, Oleksandr UL

Poster (2015, September)

We give a global description of the fine Simpson moduli spaces of 1-dimensional sheaves supported on plane quartics.

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See detailActivity tracking and indoor positioning with a wearable magnet
Popleteev, Andrei UL

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 ▲]

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See detailElectronic and Vibrational proprieties of graphene on Ir(111) and SiC(100)
Pereira Coutada Miranda, Henrique UL; Molina-Sanchez, Alejandro UL; Wirtz, Ludger UL

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: 196 (3 UL)
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See detailTop-down control over pain in fibromyalgia patients: An experimental study.
Van Ryckeghem, Dimitri; Rost, Silke UL; Van Damme, Stefaan et al

Poster (2015, September)

Detailed reference viewed: 57 (1 UL)
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See detailParafermion bound states and the fractional Josephson effect in Rashba spin-orbit coupled nanowires
Pedder, Christopher UL; Meng, Tobias; Tiwari, Rakesh et al

Poster (2015, September)

Detailed reference viewed: 56 (0 UL)
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See detailDoes body motion influence arithmetic problem solving
Sosson, Charlotte UL; Guillaume, Mathieu UL; Schuller, Anne-Marie UL et al

Poster (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: 63 (8 UL)
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See detailFracture in augmented reality
Bilger, Alexandre UL; Cotin, Stephane; Dequidt, Jeremie et al

Poster (2015, August)

Detailed reference viewed: 107 (1 UL)
See detailRaman spectroscopy as probe of nanometre-scale strain variations in graphene
Neumann, Christoph; Reichardt, Sven UL; Venezuela, Pedro et al

Poster (2015, July 14)

Detailed reference viewed: 96 (1 UL)
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See detailDevelopment and validation of a test intrument to assess basic motor qualifications in primary school
Scheuer, Claude; Bund, Andreas UL; Herrmann, Christian

Poster (2015, July)

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See detailFEniCS in Linux Containers
Hale, Jack UL; 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 ▲]

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See detailCalibration of the Tide Gauge at King Edward Point, South Georgia Island, South Atlantic Ocean
Teferle, Felix Norman UL; Hunegnaw, Addisu UL; Woodworth, P. L. et al

Poster (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 ▲]

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See detailImpact of Limited Multi-GNSS Visibility on Vertical Land Movement Estimates
Abraha, Kibrom Ebuy UL; Teferle, Felix Norman UL; Hunegnaw, Addisu UL et al

Poster (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: 196 (45 UL)
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See detailShared alterations in the human brain transcriptome during adult aging and in Parkinson's disease
Glaab, Enrico UL; Schneider, Reinhard UL

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: 170 (25 UL)
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See detailA New Datum-Controlled Tide Gauge Record for Sea Level Studies in the South Atlantic Ocean: King Edward Point, South Georgia Island
Teferle, Felix Norman UL; Hunegnaw, Addisu UL; Woodworth, P. L. et al

Poster (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 ▲]

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See detailComment favoriser la collaboration école-famille: la boîte à outils
Kerger, Sylvie UL; Poncelet, Débora UL; Dierendonck, Christophe UL

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: 93 (1 UL)
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See detailNon-integral torsion and 1-dimensional singular sheaves in the Simpson moduli space
Leytem, Alain UL

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: 70 (11 UL)
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See detailFunctional connectivity and structural analyses in the bilingual brain: implications for arithmetic.
Van Rinsveld, Amandine UL; Dricot, Laurence; Guillaume, Mathieu UL et al

Poster (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 ▲]

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See detailLearning movement phases during early stages of learning
Ghorbani, Saeed; Bund, Andreas UL

Poster (2015, June)

Detailed reference viewed: 47 (2 UL)
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See detailCoping with Bullying questionnaire: Validation of the German adaptation
Pinto Costa, Andreia UL; Steffgen, Georges UL; Skrzypiec, Grace

Poster (2015, May 21)

Detailed reference viewed: 83 (6 UL)
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See detailControl of Flame Spray Pyrolysis synthesis of Li4Ti5O12: Experimental and Computational study
Tsikourkitoudi, Vasiliki; Gavriliadis, Panagiotis; Bourantas, Georgios UL et al

Poster (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 ▲]

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See detailNeural correlates of arithmetic problem solving in bilinguals: an fMRI study.
Van Rinsveld, Amandine UL; Dricot, Laurence; Guillaume, Mathieu UL et al

Poster (2015, May)

Detailed reference viewed: 83 (1 UL)
Peer Reviewed
See detailInhibitory control influences number-space associations in atypical young adults with ADHD
Georges, Carrie UL; Hoffmann, Danielle UL; Schiltz, Christine UL

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 ▲]

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See detailA Multi-Year Combination of Tide Gauge Benchmark Monitoring (TIGA) Analysis Center Products
Hunegnaw, Addisu UL; Teferle, Felix Norman UL

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 ▲]

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See detailHydrokinetic Micro-Power Generation in Small Rivers - a New Approach
Norta, David Peter Benjamin UL; Ramanathan, Sriram; Sachau, Jürgen UL et al

Poster (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 ▲]

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See detailCalibration of the Tide Gauge at King Edward Point, South Georgia Island
Teferle, Felix Norman UL; Hunegnaw, Addisu UL; Woodworth, P L et al

Poster (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: 82 (10 UL)
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See detailAssessing IT Security Standards Against the Upcoming GDPR for Cloud Systems
Bartolini, Cesare UL; Gheorghe, Gabriela UL; Giurgiu, Andra UL et al

Poster (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 ▲]

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See detail11,8-100% Rural Renewable Energy and Power Supply and its Influence on the Luxembourgish Power System
Norta, David Peter Benjamin UL; Winkler, Christoph; Sachau, Jürgen UL et al

Poster (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: 1096 (12 UL)
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See detailDoes body motion influence arithmetic
Sosson, Charlotte UL; Guillaume, Mathieu UL; Schuller, Anne-Marie UL et al

Poster (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 ▲]

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See detailInhibitory Control Influences the SNARC Effect in Tasks without Explicit Reference to Numerical Magnitude
Georges, Carrie UL; Hoffmann, Danielle UL; Schiltz, Christine UL

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 ▲]

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See detailA force-constant model of graphene for conductivity calculations
Pereira Coutada Miranda, Henrique UL; Wirtz, Ludger UL

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: 219 (11 UL)
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See detailThe Good Side of Pride: When Being Proud Protects Us From Suggestions.
Schaan, Violetta UL; Walther, Eva

Poster (2015)

Detailed reference viewed: 106 (9 UL)
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See detailBT Quantization on K3 Surfaces
Castejon-Diaz, Hector UL

Poster (2015)

Detailed reference viewed: 77 (9 UL)
See detailAssessment of BLT Tide Gauge Benchmark Monitoring (TIGA) repro2 solutions
Hunegnaw, Addisu UL; Teferle, Felix Norman UL

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: 47 (7 UL)
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See detailMother and father competence and child attachment representations in a sample of internationally adopted adolescents
Molina, Paola; Casonato, Marta; Ongari, Barbara et al

Poster (2015)

Detailed reference viewed: 38 (4 UL)
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See detailVariables associated to aging well in poor Peruvian older adults
Tournier, Isabelle UL; Olivera, Javier

Poster (2015)

Detailed reference viewed: 37 (0 UL)
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See detailPraxisBüro BSSE
Böwen, Petra UL; Dujardin, Céline UL; Romberg, Kathrin

Poster (2015)

Detailed reference viewed: 87 (7 UL)
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See detailHigher response rates at the expense of validity? Consequences of the implementation of the ‘forced response‘ option within online surveys
Decieux, Jean Philippe Pierre UL; Mergener, Alexandra; Neufang, Kristina et al

Poster (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 ▲]

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See detailTablet-based visuo-spatial training tool for preschoolers
Cornu, Véronique UL; Pazouki, Tahereh; Martin, Romain UL

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 ▲]

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See detailHorizontal tuning of face-specific processing from childhood to elderly adulthood.
Goffaux, Valerie; Poncin, Aude; Schiltz, Christine UL

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 ▲]

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See detailROS homeostasis in a dynamic model: How to save PD neuron?
Kolodkin, Alexey UL; Ignatenko, Andrew UL; Sangar, Vineet et al

Poster (2014, December)

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See detailReproducible Research Results R3
Trefois, Christophe UL; Jarosz, Yohan UL; Gu, Wei UL et al

Poster (2014, December)

Detailed reference viewed: 147 (26 UL)
See detailRelaxation times and electron-phonon interaction in graphene quantum dots
Reichardt, Sven UL; Volk, Christian; Neumann, Christoph et al

Poster (2014, November 07)

Detailed reference viewed: 94 (3 UL)
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See detailCardiff/Luxembourg Computational Mechanics Research Group
Bordas, Stéphane UL; Kerfriden, Pierre; Hale, Jack UL et al

Poster (2014, November)

Detailed reference viewed: 165 (6 UL)
See detailField-Induced Spin Helix Chirality in Nanocrystalline Ho
Szary, Philipp UL; Bick, Jens-Peter UL; Kaiser, Daniel UL et al

Poster (2014, November)

Detailed reference viewed: 80 (16 UL)
See detailMagnetic properties of Ta/NdFeB core-shell microwires
Szary, Philipp UL; Luciu, Ioana; Duday, David et al

Poster (2014, November)

Detailed reference viewed: 69 (8 UL)
See detailIn situ single-cell investigations of substrate utilisation by Candidatus Microthrix parvicella
Sheik, Abdul UL; Muller, Emilie UL; Audinot, Jean-Nicolas et al

Poster (2014, October 16)

Detailed reference viewed: 142 (21 UL)
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See detailImpact of Station GNSS Antenna Phase Centre Calibrations on Satellite Orbits and Station Coordinates: Preliminary Results
Sidorov, Dmitry UL; Teferle, Felix Norman UL

Poster (2014, October 14)

The electromagnetic phase centre of a Global Navigation Satellite System (GNSS) antenna does not coincide with the physical one and depends on the azimuth and elevation of the incoming signals. To improve ... [more ▼]

The electromagnetic phase centre of a Global Navigation Satellite System (GNSS) antenna does not coincide with the physical one and depends on the azimuth and elevation of the incoming signals. To improve processing results, the International GNSS Service has developed antenna phase centre corrections (PCC), which include models for constant and variable biases, i.e. phase centre offsets and phase centre variations. By assuming that the small differences in PCCs between antenna/radome combinations of the same type/model are negligible, so called type-mean PCCs have been generated and, for practical reasons, have been widely applied. The type-mean PCCs are averaged corrections, which are composed from several individual PCCs. Contrary to the general assumption, individual PCCs may sometimes be significantly different for antennas of the same type and it can be argued, that the use of type-mean instead of individual calibrations may degrade GNSS-derived products, such as satellite orbits and station coordinates. Furthermore, through simple geometric considerations it can be shown that inaccuracies in the PCCs may propagate into time series of GNSS solutions and may contribute some power at the orbital frequencies and their harmonics. In this study we assess the impact of the applied antenna PCCs on satellite orbits and station coordinates. As the availability of individual PCCs for GNSS stations is very limited, we analyzed a global network with stations mainly located in Europe. We used 10 years of GPS data in our processing. Despite the limitations imposed by the poor network geometry, we observed improvements in orbit overlaps at day boundaries when individual antenna PCCs were used compared to the respective type-mean solutions. Additionally, we analyzed the impact of the applied PCCs on Precise Point Positioning (PPP) station coordinates using our computed orbits. Our preliminary results showed that out of two PPP runs, the one with individual PCCs and respective orbit set reduced the noise in solutions compared to the other PPP run. We conclude that the use of individual PCCs is advantageous for derived GNSS products, as improvements are observed both in the estimated satellite orbits and station coordinate time series. [less ▲]

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See detailVagally mediated heart rate variability is a predictor for the occurrence of the thermal grill-induced pain illusion
Scheuren, Raymonde UL; Sütterlin, Stefan UL; Anton, Fernand UL

Poster (2014, October)

Aim: Unpleasantness and negative affect accompany the sensory experience of pain. Both components of pain are heavily influenced by cognitive and emotional processes. In this framework, alterations in ... [more ▼]

Aim: Unpleasantness and negative affect accompany the sensory experience of pain. Both components of pain are heavily influenced by cognitive and emotional processes. In this framework, alterations in baroreceptor reactivity and concomitant changes in cardiac rhythm and blood pressure related to these processes contribute to the modulation of pain sensitivity. Furthermore, self-regulatory capacity has been shown to play a major role in the regulation of cognitive, affective, and behavioural reactions to adverse contexts. These regulatory mechanisms include adjustment of cardiovascular activity and heavily depend on prefrontal cortical processing. Vagally mediated heart rate variability (HRV) at rest is an indicator of the prefrontally modulated vagal activation and has been used as a psychophysiological marker for self-regulatory capacity. The present study investigated the predictive value of the trait self-regulation in the triggering of the thermal grill-induced pain illusion (TGI). We hypothesized inter-individual differences in paradoxical pain perception to be predicted by self-regulatory capacity in a way that participants displaying lower levels of self-regulation should be more likely to perceive the painful grill illusion than subjects with relatively higher self-regulation ability. Methods: A total of 54 healthy participants were recruited among university students and staff. A custom-built, water-bath driven thermal grill device, with interlaced cold and warm glass tubes, was used for the induction of the TGI. A pre-set temperature combination of 15°C and 41°C was applied to the palm of the dominant hand with stimulus durations of 1 min. Subsequent control conditions consisted in the interlaced combination of a baseline temperature of 32°C with one of the stimulus temperatures mentioned above. The procedure was repeated three times. The volunteers used numerical rating scales ranging from 0-100 to rate sensory and affective pain perceptions in intervals of 15 seconds. Vagally mediated HRV at rest was assessed prior to the thermal stimulation protocols. Results: Time-domain components of HRV used as graded indicators of parasympathetic activity and of the extent of self-regulation significantly predicted the possibility of an occurrence of pain and unpleasantness sensations in response to thermal grill stimulation (p <.05). Participants characterized in this way were more likely to express paradoxical pain than subjects not displaying similar levels of HRV. Conclusion: The present results support previous findings indicating an impact of several psychological traits on the individual disposition to paradoxical pain perceptions. Self-regulation ability, operationalized as vagally mediated heart rate variability, can partially explain the probability of perceived pain in response to non-noxious thermal grill stimulation. [less ▲]

Detailed reference viewed: 174 (14 UL)
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See detailDifferent number-processing tasks entail qualitatively different SNARC effects
Georges, Carrie UL; Hoffmann, Danielle UL; Schiltz, Christine UL

Poster (2014, October)

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 been extensively replicated, it is characterized by high inter-individual variability (e.g. Hoffmann et al., 2014). Moreover, even though number-space associations have been observed when numerical magnitude is both relevant (e.g. magnitude comparison) and irrelevant (e.g. parity and color judgment) for successful task completion, their strengths and underlying cognitive processes seem to vary depending on whether explicit reference to numerical magnitude is drawn or not (Fias et al., 2001; Mitchell et al., 2012). To further evaluate this hypothesis, we examined whether the SNARC effects observed in a single individual during distinct number-processing tasks were systematically linked. We computed correlations between the SNARC effects measured during a parity, magnitude and color judgment task in a population of 85 healthy university students (39 females, mean age=23.44 years). Interestingly, no relation could be observed between the color (slope=-6.79) and magnitude SNARC effects (slope=-6.98; r=0.18, p=0.11), indicating that number-space associations potentially underlie different cognitive operations in tasks with and without explicit numerical magnitude processing. Conversely, the parity SNARC effect (slope=-11.58) correlated with both the color (r=0.36, p=0.001) and magnitude SNARC effects (r=0.36, p=0.001). This suggests that although no explicit numerical magnitude treatment is required in the parity task – explaining its relationship with the color task – the involvement of number semantics is sufficient to position it in line with the magnitude judgment task. [less ▲]

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See detailHydrogeophysical Tools for Investigating Groundwater Storage in the Subsurface of a Karst System
Watlet, Arnaud; Van Noten, K.; Lecocq, T. et al

Poster (2014, September 14)

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See detailA comprehensive integrative analysis of the transcriptional network underlying the zebrafish heart regeneration
Androsova, Ganna UL; Rodius, Sophie; Nazarov, Petr et al

Poster (2014, September 08)

Despite a notable reduction in incidence of acute myocardial infarction (MI), patients who experienced it remain at risk for premature death and cardiac malfunction. The human cardiomyocytes are not able ... [more ▼]

Despite a notable reduction in incidence of acute myocardial infarction (MI), patients who experienced it remain at risk for premature death and cardiac malfunction. The human cardiomyocytes are not able to achieve extensive regeneration upon MI. Remarkably, the adult zebrafish is able to achieve complete heart regeneration following amputation, cryoinjury or genetic ablation. This raises new potential opportunities on how to boost heart healing capacity in humans. The objective of our research is to characterize the transcriptional network of the zebrafish heart regeneration and underlying regulatory mechanisms. To conduct our investigation, we used microarray data from zebrafish at 6 post-cryoinjury time points (4 hours, and 1, 3, 7, 14 and 90 days) and control samples. We thereon looked for the gene co-expression patterns in the data and, based on that, constructed a weighted gene co-expression network. To detect candidate functional sub-networks (modules), we used two different network clustering approaches: a density-based (ClusterONE) and a topological overlap-based (Hybrid Dynamic Branch Cut) algorithms. The visualization of the expression changes of the candidate modules reflected the dynamics of the recovery process. Also we aimed to identify candidate “hub” genes that might regulate the behavior of the biological modules and drive the regeneration process. We identified eighteen distinct modules associated with heart recovery upon cryoinjury. Functional enrichment analysis displayed that the modules are involved in different cellular processes crucial for heart regeneration, including: cell fate specification (p-value < 0.006) and migration (p-value < 0.047), ribosome biogenesis (p-value < 0.004), cardiac cell differentiation (p-value < 3E-04), and various signaling events (p-value < 0.037). The visualization of the modules’ expression profiles confirmed the relevance of these functional enrichments. For instance, the genes of the module involved in regulation of endodermal cell fate specification were up-regulated upon injury until 3 days. Among the candidate hub genes detected in the network, there are genes relevant to atherosclerosis treatment and inflammation during cardiac arrest. These and other findings are currently undergoing deeper computational analyses. The top promising targets will be independently validated using our zebrafish (in vivo) model. In conclusion, our findings provide insights into the complex regulatory mechanisms involved during heart regeneration in the zebrafish. These data will be useful for modelling specific network-based responses to heart injury, and for finding sensitive network points that may trigger or boost heart regeneration. [less ▲]

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See detailAnalysis of local grid stability by Hydrokinetic Turbines around a Hydropower Plant in India
Tewari, Udit UL; Sachau, Jürgen UL; Norta, David Peter Benjamin UL et al

Poster (2014, September 08)

Indian proverb, “the utmost darkness is under the oil lamp”, is indeed true in relation to present scenario in places under local distribution grids in India, situated around the Hydropower plants. These ... [more ▼]

Indian proverb, “the utmost darkness is under the oil lamp”, is indeed true in relation to present scenario in places under local distribution grids in India, situated around the Hydropower plants. These conventional hydropower plants use hydrostatic energy for power generation with a conversion efficiency of 85-95%, whereas the energy possessed by available body of moving water around the plant, known as “Hydrokinetic energy”, is difficult to extract due to low flow rates. This poster, prepared in collaboration with Smart Hydro Power GmbH, Germany presents the impact of “ Combined Cycle Hydroelectric Power System”- a combination of hydropower plant and hydrokinetic turbines, to provide additional power to the local grid situated around an existing hydropower plant. It intends to show that, for water rich areas, hydrokinetic turbines are an inexpensive option and offer a viable solution for securing reliable power and stabilizing the local grid situated around a hydropower plant. [less ▲]

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See detailIntegration of Distributed Renewable Generators in the Luxembourgish Power System
Norta, David Peter Benjamin UL; Sachau, Jürgen UL; Allelein, Hans-Josef

Poster (2014, September 08)

The amount of renewable generators increases worldwide. With the higher share of renewable resources in a system, simultaneously the alternating power generation increases. To understand the intermittent ... [more ▼]

The amount of renewable generators increases worldwide. With the higher share of renewable resources in a system, simultaneously the alternating power generation increases. To understand the intermittent influence of the three main renewable technologies, namely windpower, solarpower and hydropower, energy balances of larger regions and the corresponding renewable, distributed generation has to be estimated to understand their generators’ influence on a system. In the following Luxembourg is considered. [less ▲]

Detailed reference viewed: 143 (10 UL)
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See detailElicitation of Negative Emotions in Adolescents using Video Clips
Ouzzahra, Yacine UL; Vögele, Claus UL

Poster (2014, September 05)

Detailed reference viewed: 95 (12 UL)
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See detailNear Field Dynamic, Co-seismic and Post-seismic Deformations Associated with the 2013, M7.8, and 2003, M7.6, South Scotia Ridge Earthquakes Observed with GPS
Smalley, Robert Jr; Bevis, Mike G; Zakrajsek, A F et al

Poster (2014, September)

The South Scotia Ridge (SSR) left-lateral transform/strike-slip (S-S) fault defines the Scotia plate’s (SP) southern boundary separating it from the Powell Basin (PB), South Orkney Microcontinent (SOM ... [more ▼]

The South Scotia Ridge (SSR) left-lateral transform/strike-slip (S-S) fault defines the Scotia plate’s (SP) southern boundary separating it from the Powell Basin (PB), South Orkney Microcontinent (SOM), and the Weddell Sea sections of the Antarctic plate (AP). The SP developed as a space filling accommodation zone for S. America-Antarctica relative motions, mostly during the last 40 m.y. The SSR also hosts several restraining and releasing bends. The SP, PB and SOM have complex evolution histories including large-scale displacement and stretching of the SOM, as well as other continental fragments within the SP, all of which were incorporated into a background of changing sea floor spreading geometries. The SOM defines an ~300 km segment of the SSR opposite a section of the SP that is primarily oceanic crust with a few small, stretched continental fragments. Two large earthquakes, M7.6 and 7.8, with aftershock zones largely confined to the northern SOM boundary, occurred on the SSR in 2003 and 2013. Moment tensor solutions show they occurred on faults dipping ~30 and 45° to the south. The 2013 event was almost pure, left-lateral strike-slip, while the 2003 event was oblique but predominantly strike-slip. This is an unusual combination of fault dip and slip direction for a strike-slip plate boundary. The half duration of both events is also relatively long. A continuous GPS (CGPS) station on Laurie Island is located immediately west of the rupture zone of the 2003 event and at the approximate center, and close to the surface projection, of the finite fault models for the 2013 earthquake. We present co-seismic static offsets and post-seismic transients for both earthquakes from GPS daily position estimates. In addition, the CGPS station now records at 1 Hz and we present the GPS displacement seismogram for the 2013 event. This record contains a complex signal that includes the passage of the Love and Rayleigh surface waves, with max displacements of ~70 cm, over an ~80 second time interval during which a ~50 cm static offset developed. [less ▲]

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See detailIntergenerational relations between adult children and their older parents: A comparison between host nationals and Portuguese immigrants in Luxembourg
Barros Coimbra, Stephanie UL; Albert, Isabelle UL; Ferring, Dieter UL

Poster (2014, September)

Migration and ageing have become key topics of the contemporary world. In the next years, many western countries will be confronted with specific challenges of an ageing society. Among these, the ... [more ▼]

Migration and ageing have become key topics of the contemporary world. In the next years, many western countries will be confronted with specific challenges of an ageing society. Among these, the situation of older migrants is of particular interest in many European countries. Only few studies have, however, focused the relationship quality between adult children and their ageing parents in host national compared to immigrant families. Within this context, expectations of different generations towards one another may be of specific importance. As ageing parents approach a critical period of their life span, they may in general more likely experience a need for intergenerational support and solidarity and develop specific expectations about support exchange. These expectations may be challenged when families migrate from a culture of interdependence to a culture of independence, since cultural contact might lead to core changes in value orientations. As these changes are often more pronounced in the second generation than in the first, a generation gap between ageing parents and their adult children might result out of this process. A major question in this context refers to mutual expectations and obligations between family members of different generations as far as emotional and financial support are concerned. Adult children from immigrant families might, for instance, be subject to the experience of ambivalent or conflictual feelings regarding the desire to become independent from their parents; at the same time, they may feel the urge to conform to parental expectations or to support their parents in accordance to the values of their parents’ culture of origin. However, older parents may also undergo changes in their perception of intergenerational support and lower their expectations in the process of acculturation. In the present study, a cross-cultural comparison between Luxemburgish and Portuguese triads of adult children and their older parents living in Luxembourg (N = 120) will be realized. We will focus on different key issues regarding intergenerational family relations between first and second generations of host nationals and immigrants. One of the main issues will be to examine interdependent and independent self-construals comparing both cultural groups and both generations, presuming that there might be an intergenerational or an acculturation gap. Another research question concerns the potential consequences of divergent expectations about support and solidarity between family members of different generations, such as ambivalent or conflictual feelings. Finally, we will analyse in how far changes in the ideas about intergenerational relations might have affected and be affected by the life-long goal pursuit of older parents of both cultural groups. Results will be discussed within the framework of an integrative model of intergenerational family relations in the light of migration and ageing, which will be presented as a heuristic to explain similarities and differences in adult child-parent relationships by comparing two culturally different groups. [less ▲]

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See detailEffect of task difficulty and no-forced responses on temporal performance and confidence levels
Lamotte, Mathilde UL; Droit-Volet, Sylvie; Izaute, Marie

Poster (2014, September)

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See detailEmergence of Sovereign Wealth Funds
Carpantier, Jean-Francois UL; Vermeulen, Wessel

Poster (2014, September)

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See detailReading in German versus reading in French: Are there different attributes that determine the difficulty of reading comprehension items in both languages?
Reichert, Monique UL; Sonnleitner, Philipp UL; Martin, Romain UL

Poster (2014, August 26)

The current study aims at identifying those cognitive and linguistic attributes that best describe and explain reading test performance in two languages, and of individuals with different language ... [more ▼]

The current study aims at identifying those cognitive and linguistic attributes that best describe and explain reading test performance in two languages, and of individuals with different language backgrounds. German and French language teachers from Luxembourg secondary schools were asked to rate a number of either German or French reading tasks with regard to a list of cognitive and linguistic attributes. The teachers’ item attribute ratings were then linked to the empirical data collected in a large-scale study among Luxembourg 9th graders. Based on the initial item-attribute assignments, ideal item-response patterns could be presumed and compared to real examinees’ response patterns by using a linear logistic test modeling approach. The results from the different modeling steps show (a) whether the theoretical assumptions underlying the difficulty in reading comprehension items hold, (b) whether they hold for both German and French, and (c) whether they hold for participants with different language backgrounds. [less ▲]

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See detailThe role of affective instability on daily chronic pain outcomes
Rost, Silke UL; Van Ryckeghem, Dimitri; Koval, Peter et al

Poster (2014, August 21)

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See detailIntergenerational relations between older parents and their adult children: Effect on subjective well-being
Barros Coimbra, Stephanie UL; Albert, Isabelle UL; Ferring, Dieter UL

Poster (2014, August)

In the near future, many western nations will be confronted with specific issues regarding ageing populations and their physical and psychological well-being. Ageing persons might experience a greater ... [more ▼]

In the near future, many western nations will be confronted with specific issues regarding ageing populations and their physical and psychological well-being. Ageing persons might experience a greater need for intergenerational support and solidarity, especially in the context of migration. The acculturation process may entail an increased intergenerational gap possibly leading to conflicts and ambivalences between family members. This might in turn cause a diminished feeling of their well-being. A cross-cultural comparison is envisaged between Luxemburgish and Portuguese triads of adult children and their older parents living in Luxembourg (N = 120). Participants will report on their mutual relationship quality and subjective well-being by using a standardized questionnaire. Similitudes and differences in mutual expectations of the participants as well as the effects of an intergenerational gap in ideas about intergenerational solidarity on relationship quality and on subjective well-being (SWB) of family members will be examined. Results will be discussed regarding the relevance of intergenerational family relations for subjective well-being in the light of migration and ageing. [less ▲]

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See detailRecent Activities at the King Edward Point Geodetic Observatory, South Georgia, in Support of TIGA Objectives
Teferle, Felix Norman UL; Hunegnaw, Addisu UL; Williams, Simon et al

Poster (2014, July 26)

In 2013 the King Edward Point (KEP) Geodetic Observatory was established in South Georgia, South Atlantic Ocean, in support of geoscience applications. South Georgia Island has been a key location for the ... [more ▼]

In 2013 the King Edward Point (KEP) Geodetic Observatory was established in South Georgia, South Atlantic Ocean, in support of geoscience applications. South Georgia Island has been a key location for the seismic, geomagnetic and oceanic global monitoring networks. However, no geodetic permanent monitoring station had been established there despite the lack of observations from this region within the International GNSS Service (IGS) network of Global Navigation Satellite System (GNSS) stations. Currently, the observatory consists of two state-of-the-art GNSS stations (KEPA 42701M001 and KRSA 42702M001) with local benchmark networks, allowing the height determinations from the GNSS antennas to be transferred to the tide gauge (Global Sea Level Observing System 187) and forming a height reference within the International Terrestrial Reference Frame. In this study, we will present an evaluation of the GNSS observations from the KEP Geodetic Observatory for the period from February 2013 to December 2013. We calculate multipath and positioning statistics and compare these to those from IGS stations. We report on the benchmark network and tide board installation, as well as, on the results from the two levelling campaigns carried out to date. For the future it is envisaged that the stations will contribute to the TIGA objective of monitoring vertical land movements at tide gauges, and that KEPA will contribute to the IGS network. [less ▲]

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See detailThe Luxembourg Workplace Mobbing Scale: Psychometric properties of a new instrument
Steffgen, Georges UL; Kohl, Diane

Poster (2014, July 17)

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See detailAge of Acquisition Norms for Nouns and Verbs in 22 Languages
Łuniewska; Anđelković; Armon-Lotem et al

Poster (2014, July 15)

Word characteristics such as frequency, imageability, concreteness and length are considered good predictors of performance in lexical tasks like picture naming, word comprehension or lexical decision ... [more ▼]

Word characteristics such as frequency, imageability, concreteness and length are considered good predictors of performance in lexical tasks like picture naming, word comprehension or lexical decision-making. There is also evidence that the age of acquisition (AoA) of words can partly explain aspects of word processing behaviour in later childhood and adulthood (Morrison et al., 1992; Brysbaert & Cortese, 2010).In the present study, we collected AoA norms for 158 nouns and 142 verbs in 22 languages: Afrikaans, British English, Catalan, Danish, Finnish, German, Hebrew, Irish, IsiXhosa, Italian, Lithuanian, Luxembourgish, Maltese, Norwegian, Polish, Russian, Serbian, Slovak, South African English, Spanish, Swedish and Turkish. In a preparatory picture naming procedure, adult native speakers of 34 languages were asked to name 508 object and 504 action pictures. Words shared among the target languages were retained for the final corpus. Our study followed the typical procedure for establishing AoA (see Morrison et al. 1997) and was performed on-line (see www.words-psych.org). 804 adult participants (at least 20 for each language) were asked to specify the age at which they learned the words in their native language. The vast majority of words were rated as acquired by the age of 7 years, demonstrating overlap in early vocabulary across diverse languages. Significant correlations between all language pairs point to a similar developmental sequence for the words under investigation. No previous study has compared AoA judgements on a shared set of words in a wide range of languages. 'The AoA data collected in the 22 languages provides word characteristics that should assist the design of cross-linguistic psycholinguistic experiments and the preparation of materials for use in the assessment and treatment of language disorders in preschool children. The AoA data are currently being used to control for AoA in the construction of cross-linguistic lexical tasks assessing word knowledge in monolingual and bilingual children. [less ▲]

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See detailModel-based time-distorted Contexts for efficient temporal Reasoning
Hartmann, Thomas UL; Fouquet, François UL; Nain, Grégory UL et al

Poster (2014, July 02)

Intelligent systems continuously analyze their context to autonomously take corrective actions. Building a proper knowledge representation of the context is the key to take adequate actions. This requires ... [more ▼]

Intelligent systems continuously analyze their context to autonomously take corrective actions. Building a proper knowledge representation of the context is the key to take adequate actions. This requires numerous and complex data models, for example formalized as ontologies or meta-models. As these systems evolve in a dynamic context, reasoning processes typically need to analyze and compare the current context with its history. A common approach consists in a temporal discretization, which regularly samples the context (snapshots) at specific timestamps to keep track of the history. Reasoning processes would then need to mine a huge amount of data, extract a relevant view, and finally analyze it. This would require lots of computational power and be time-consuming, conflicting with the near real-time response time requirements of intelligent systems. This paper introduces a novel temporal modeling approach together with a time-relative navigation between context concepts to overcome this limitation. Similarly to time distortion theory, our approach enables building time-distorted views of a context, composed by elements coming from different times, which speeds up the reasoning. We demonstrate the efficiency of our approach with a smart grid load prediction reasoning engine. [less ▲]

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See detailAcculturation strategies of young immigrants of Moroccan and Portuguese origin in Belgium: The perception of young Belgian natives.
Barros Coimbra, Stephanie UL; Albert, Isabelle UL; Ferring, Dieter UL et al

Poster (2014, July)

The concept of acculturation refers to cultural and psychological changes resulting from the contact between members of multiple cultures. According to Berry (1997), individuals display different ... [more ▼]

The concept of acculturation refers to cultural and psychological changes resulting from the contact between members of multiple cultures. According to Berry (1997), individuals display different attitudes and behaviours in the process of acculturation. Earlier studies have shown that members of host societies and immigrants often prefer the integration strategy, which seems to have most positive outcomes for both host nationals and immigrant communities. The aim of the present study was to analyse the perceptions and preferences of Belgians regarding the acculturation stratégies displayed by two immigrant communities in Belgium, namely Portuguese and Moroccan. A sample of N = 120 Belgian students between the ages of 18 and 29 living in Brussels participated in the present study. Participants were randomly assigned to six different groups of n = 20 persons each: these were presented with six scenarios that differed by a combination of one of Berry’s acculturation strategies (separation, integration and assimilation) with one of two origins of the main character (Portuguese or Moroccan). Participants then filled out a standardized questionnaire measuring their degree of agreement and disagreement to different statements with regard to the displayed acculturation strategy. Analyses showed that Belgian natives rather appreciated integration strategies by immigrants (i.e. conservation of the cultural identity and an appropriation of the host culture’s values at the same time) to assimilation (i.e. own-culture desistance while seeking daily interaction with the majority) or separation strategies (i.e. maintenance of the heritage culture while rejecting contact with the host culture). Furthermore, Belgian participants expressed slightly more positive feelings toward young Portuguese immigrants compared to young Moroccan immigrants, which might be due to a smaller cultural distance between the former two cultures. No interaction effects between displayed acculturation strategy and cultural origin of the scenario’s main character were found. Results are discussed within the framework of Berry’s acculturation strategy model as well as referring to theories of similarity and attraction. [less ▲]

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See detailIntergenerational family relations in Luxembourg: Adult children and their ageing parents in migrant and non-migrant families
Albert, Isabelle UL; Barros Coimbra, Stephanie UL; Ferring, Dieter UL

Poster (2014, July)

Most studies in the context of acculturation research have focused on family relations between first generation parents and their second generation children in adolescence, but less is known about ... [more ▼]

Most studies in the context of acculturation research have focused on family relations between first generation parents and their second generation children in adolescence, but less is known about immigrant families at later stages in the family life cycle. As first generation immigrants are currently approaching retirement age in many Western European countries, the question of how parent-child relations in adulthood are regulated, gains - however - particular importance. Older migrants and their adult children might be confronted with very special tasks compared to families without migration background. In general, first generation parents might need higher intergenerational support from their adult children due to a smaller social network in the host country or due to fewer sociocultural resources such as language competences. There might also be an acculturation gap between parents and their adult children regarding different identity constructions, value orientations, norms and expectations with regard to intergenerational solidarity and support. These differences in expectations and beliefs might affect relationship quality between the family members from different generations as well as their well-being. In the present study, a cross-cultural comparison of altogether N = 120 Portuguese and Luxembourgish triads of older parents and their adult children, both living in the Grand-Duchy of Luxembourg, is envisaged. The aims of the study are, firstly to examine similarities and differences in family values, internalized norms and mutual expectations of older parents and their adult children in migrant and non-migrant families; secondly, to analyze in how far an acculturation gap respectively a generation gap might have an impact on the relationship quality between parents and their adult children; thirdly and related to this, to explore subjective well-being (SWB) of all involved family members. Results will be discussed in the framework of an integrative model of intergenerational family relations in the light of migration and ageing. This model will be proposed as a heuristic to explain similarities and differences in adult child-parent relations in migrant and non-migrant families. [less ▲]

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See detailA signal processing method to remove environmental effects for damage detection in bridge structures
Nguyen, Viet Ha UL; Mahowald, Jean UL; Maas, Stefan UL et al

Poster (2014, July)

This paper consists in damage diagnosis for several real bridges in Luxembourg. Before, different analysis methods were applied to the data measured from these structures showing interesting results ... [more ▼]

This paper consists in damage diagnosis for several real bridges in Luxembourg. Before, different analysis methods were applied to the data measured from these structures showing interesting results. However, some difficulties are faced, especially due to environmental influences (temperature and soil-behaviour variations) which overlaid the structural changes caused by damage or confuse damage levels. These environmental effects are investigated in detail and removed in this work through Principal Component Analysis. Damage index is based on outlier analysis [less ▲]

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See detailFrustration and anger regulation in children with autism spectrum disorder
Pinto Costa, Andreia UL; Steffgen, Georges UL

Poster (2014, July)

Autism Spectrum Disorder (ASD) is characterized by impairments in social interaction, communication and difficulties regulating emotions. Emotion regulation is an important aspect of children’s emotional ... [more ▼]

Autism Spectrum Disorder (ASD) is characterized by impairments in social interaction, communication and difficulties regulating emotions. Emotion regulation is an important aspect of children’s emotional and social development. It maximizes learning and allows the development of trusting relationships. In the present study we aimed at studying how children with ASD regulate frustration and anger. Participants were 17 children diagnosed with ASD aged between 5 and 12 years old (14 boys and 3 girls) and their parents. Emotion regulation was assessed by parents’ reports of their child’s emotion regulation (Emotion Regulation Checklist, Shields & Cicchetti, 1998) and through the observation of children during the episode “Attractive toy placed behind a barrier”. The purpose of this episode was to elicit frustration and anger by placing a toy, with which the child had been playing, behind a barrier. Anger was coded as verbal and physical action against the barrier or persons present. Results revealed that children with more autistic symptoms were evaluated by their parents as having more difficulties regulating their emotions. Furthermore, parents’ evaluations of their child’s emotion regulation were positively correlated to the expression of anger during the frustration and anger regulation episode. However, no significant differences were observed in terms of autistic symptoms during the frustration and anger regulation episode. In conclusion, results show that children with more autistic symptoms are seen by their parents as having more difficulties regulating their emotions but do not show differences in terms of their emotion regulation during a frustration and anger eliciting episode. [less ▲]

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See detailSUGAC: Sofia University GNSS Analysis Center
Simeonov, Tzvetan; Sidorov, Dmitry UL; Teferle, Felix Norman UL et al

Poster (2014, June 25)

The Sofia University GNSS Analysis Centre (SUGAC, suada.phys.uni-sofia.bg) is a new analysis centre established via collaboration between the Department of Meteorology and Geophysics of Sofia University ... [more ▼]

The Sofia University GNSS Analysis Centre (SUGAC, suada.phys.uni-sofia.bg) is a new analysis centre established via collaboration between the Department of Meteorology and Geophysics of Sofia University, the IPOS - BuliPOS GNSS network in Bulgaria and the University of Luxembourg. In April 2014, the first processing campaign took place. One year GNSS data from 7 stations of the BuliPOS network are processed in collaboration with the University of Luxembourg. Tropospheric products (Zenith Total Delay and gradients) with 5 min temporal resolution are obtained using the NAPEOS software, developed by ESA. The tropospheric products from this campaign will be used for validation of the Weather Research and Forecasting (WRF) model as well as for case studies during intense precipitation events and fog. In this work the WRF model validation for Bulgaria will be presented. Future work will be the establishment of autonomous near real-time processing of the regional ground-based GNSS network in Southeast Europe in support of the EUMETNET E-GVAP and COST ES1206 ”Advanced Global Navigation Satellite Systems for Severe Weather Events and Climate” projects. [less ▲]

Detailed reference viewed: 102 (0 UL)