References of "Unpublished conference"
     in
Bookmark and Share    
See detailApplicability of ESM in school: Quality of students’ social interactions
Knickenberg, Margarita; Zurbriggen, Carmen UL; Hinni, Chantal et al

Scientific Conference (2019, August)

Detailed reference viewed: 27 (0 UL)
Full Text
Peer Reviewed
See detailFirst Reflections on Identity Constructions of International Mobiles based on Data of from the German Emigration and Remigration Panel Study (GERPS)
Decieux, Jean Philippe Pierre UL

Scientific Conference (2019, August)

International mobile persons usually live in multicultural contexts and have frequent opportunities for cultural contact. They live for example in mixed-national households or interact with different ... [more ▼]

International mobile persons usually live in multicultural contexts and have frequent opportunities for cultural contact. They live for example in mixed-national households or interact with different cultures in their everyday live. An interesting question is how they organize and experience their nationalities, identities and feelings of belongings and how these develop over time. Based on data from the first two waves of the new and unique German Emigration and Remigration Panel Study (GERPS) the paper tries to answer the following questions: How are the identities and belongings experienced? Do they self-identify in a mono- or bi or transcultural way, and what factors (sociodemographic, personality) contribute to either identification? GERPS will provide information on approximately 11.000 international mobile individuals which have recently emigrated from Germany to any other country in the world or recently re-migrated to Germany. As GERPS is a panel study, I will be able to present first results concerning developments and changes over time, which is important as modern theories reflect identity and cultural construction as dynamic negotiation processes. [less ▲]

Detailed reference viewed: 76 (4 UL)
Full Text
See detailVerlet buffer for (X)DEM
Mainassara Chekaraou, Abdoul Wahid UL; Rousset, Alban UL; Besseron, Xavier UL et al

Scientific Conference (2019, July 26)

The Extended Discrete Element Method (XDEM) is a novel and innovative numerical simulation technique that extends the dynamics of granular materials or particles as described through the classical ... [more ▼]

The Extended Discrete Element Method (XDEM) is a novel and innovative numerical simulation technique that extends the dynamics of granular materials or particles as described through the classical discrete element method (DEM) by additional properties such as the thermodynamic state, stress/strain for each particle. Such DEM simulations used by industries to set up their experimental processes are complex and heavy in computation time. Those simulations perform at each time step a collision detection to generate a list of interacting particles that is one of the most expensive computation parts of a DEM simulation. The Verlet buffer method, which was first introduced in Molecular Dynamic (MD) (and is also used in DEM) allows to keep the interaction list for many time step by extending each particle neighborhood by a certain extension range, and thus broadening the interaction list. The method relies mainly on the stability of the DEM, which ensures that no particles move erratically or unpredictably from one time step to the next: this is called temporal coherency. In the classical and current approach, all the particles have their neighborhood extended by the same value which leads to suboptimal performances in simulations where different flow regimes coexist. Additionally, and unlike in MD (which remains very different from DEM on several aspects), there is no comprehensive study analyzing the different parameters that affect the performance of the Verlet buffer method in DEM. In this work, we apply a dynamic neighbor list update method that depends on the particle's individual displacement, and an extension range specific to each particle and based on their local flow regime for the generation of the neighbor list. The update of the interaction list is analyzed throughout the simulation based on the displacement of the particle allowing a flexible update according to the flow regime conditions. We evaluate the influence of the Verlet extension range on the performance of the execution time through different test cases and we empirically analyze and define the extension range value giving the minimum of the global simulation time. [less ▲]

Detailed reference viewed: 65 (3 UL)
Full Text
See detailPresent-Day Land and Sea Level Changes around South Georgia Island: Results from Precise Levelling, GNSS, Tide Gauge and Satellite Altimetry Measurements
Teferle, Felix Norman UL; Dalziel, I W D; Hunegnaw, Addisu UL et al

Scientific Conference (2019, July 25)

South Georgia Island, the main land outcrop on the South Georgia microcontinent (SGM), is located approximately 1,400 km east of the Falkland Islands and approximately 1,400 km northeast of the ... [more ▼]

South Georgia Island, the main land outcrop on the South Georgia microcontinent (SGM), is located approximately 1,400 km east of the Falkland Islands and approximately 1,400 km northeast of the northernmost tip of the Antarctic peninsular. The SGM is believed to lie south of the North Scotia Ridge (NSR), which forms the boundary to the South America Plate, while to the south it is bordered by the Scotia Plate (SP). In its sub-Antarctic location, the island is largely covered by mountain glaciers which have been reported to be retreating due to climatic change. Furthermore, during past glaciation periods the island and its shelf area, stretching much of the SGM, have been ice covered as was revealed by scarring of the sub-oceanic topography. Together with ongoing tectonics along the NSR and recent seismicity at the SP boundary, these processes have the ability to produce significant uplift on local to regional scales. With its mid-ocean location in the Southern Atlantic Ocean South Georgia Island is in a key position for the oceanic and geodetic global monitoring networks. As these net-works suffer from a Hemisphere imbalance with the number of stations in the Northern Hemisphere outnumbering those in the Southern Hemisphere, operating these stations to the highest standards is of key scientific value. It is of particular interest to monitor the tide gauge (GLOSS ID 187) at King Edward Point (KEP) for vertical land movements to establish a continuous record of its datum within the Permanent Service for Mean Sea Level (PSMSL), which in turn makes it useful for long-term sea level studies and satellite altimetry calibrations. With the establishment of five GNSS stations on the islands by teams from Luxembourg, the UK and the USA during 2013 to 2015, and the scientific analysis of these data within a global network of stations, it has now become possible to study present-day vertical land movements and their impacts. Furthermore, together with four precise levelling campaigns of the KEP benchmark network in 2013, 2014 and two in 2017, it has also been possible to investigate the very local character of the vertical motions near KEP, i.e. the stability of the jetty upon which the tide gauge is mounted. In this study, we will present the still preliminary results from the GNSS and levelling measurements and will discuss their impact on the sea level record from the KEP tide gauge. Our measurements show that while South Georgia Island and the area around KEP are rising, the jetty and tide gauge are subsiding, leading to a lower magnitude of the observed sea level change than expected from satellite altimetry. In order to improve the agreement between these measurements both local and regional vertical land movements need to be monitored. [less ▲]

Detailed reference viewed: 157 (3 UL)
Peer Reviewed
See detailBracketing in student writing: its uses (and abuses)
Deroey, Katrien UL

Scientific Conference (2019, July 23)

This paper reports on the use of bracketed text in a large corpus of student writing. The function of bracketing has been neglected in academic writing research and coursebooks. Yet it is closely related ... [more ▼]

This paper reports on the use of bracketed text in a large corpus of student writing. The function of bracketing has been neglected in academic writing research and coursebooks. Yet it is closely related to important text construction issues such as information packaging, coherence, clarity, conciseness, intertextual framing and sourcing. With a view to informing academic writing description and instruction, we examined the relationship between bracketed text and its cotext in a wide variety of disciplines and assignment genres. The relationships are described using an adaptation of Halliday and Matthiessen’s (2014) logico-semantic framework of clausal relationships. To better understand and teach the use of this information packaging feature, we studied the relationship between bracketed text and its cotext in the British Academic Written English (BAWE) corpus of high-graded student assignments. Using Sketch Engine and corpus query language, we extracted a random sample of 2000 instances of bracketing in running text only. This subcorpus is composed of 500 instances from each of the four main disciplinary groupings (Arts and Humanities, Life Sciences, Physical Sciences, Social Sciences) and contains instances from most of the BAWE assignment genres. The concordances were imported into a database table in FileMaker Pro. This database programme facilitates coding by limiting choices depending on previous selections and thus guiding the coder through the analytical steps. For the analysis of the data, it offers flexibility for grouping records and aggregating results on different levels. The logico-semantic framework used in systemic functional linguistics to classify the relationships between clauses (Halliday & Matthiessen, 2014) served as our starting point to classify the relationships between bracketed text and cotext. This framework distinguishes two fundamental logico-semantic relationships: expansion, which ‘relates phenomena as being of the same order of experience’, and projection, which ‘relates phenomena of one order of experience (the processes of saying and thinking) to phenomena of a higher order (semiotic phenomena – what people say and think)’ (p. 443). The latter contains three subtypes: elaboration (‘one clause elaborates on the meaning of another by further specifying or describing it’) (p. 461), enhancement (‘one clause (or subcomplex) enhances the meaning of another by qualifying it) (p. 476) and extension (‘one clause extends the meaning of another by adding something new to it’) (p. 471). This framework was refined and expanded through several stages of interrating and discussion in order to reflect our findings. We first analysed a random sample of 1000 instances from the whole BAWE corpus. With the resulting adapted classificatory framework we next independently analysed a quarter of our subcorpus of 2000 concordances. This led to further refinement of the framework and classificatory criteria. Finally, we each analyzed a different set of concordances from the disciplinary groupings. Disciplinary informants were consulted where needed. Our analysis revealed four major logico-semantic relationships between the bracketed text and cotext: in addition to Halliday & Matthiessen’s (2014) projection (1) and expansion (elaboration (2), enhancement (3, 4), extension (5)), we identified bracketed text functioning as intratextual reference (6) and code (7). The few instances that could not be confidently classified were assigned to a ‘hard to classify’ category. (1) However the anticipated number of children per woman in Europe and the USA is still near or above two (Bongaarts, 1999), showing that many are still having children. (2) Many of these injures are healed fractures and breaks occurring around the torso (upper body). (3) It is dated to the reign of Nectanebo II (360-343 BC). (4) Acetanilide (4.78g, 35.4 mmol) was dissolved in cold, glacial acetic acid (25ml, 437.1 mmol) (5) Parmenides decision to include a cosmology that he has already (apparently) proved to be flawed is an interesting one to say the least. (6) This is called circular polarization (figure 5) and is the natural state of white light. (7) Stronger field ligands such as (PPh 3) and (NCS) increase the splitting. Projection was –perhaps not surprisingly- the most common relationship by far, although markedly less frequent in the Physical Sciences. Expansion was mainly achieved through elaboration, with restatements (2) and abbreviations predominating. Enhancement relationships were mostly temporal locations (3) or measurements (4). Extension was relatively rare (5). Intratextual references (6) took various forms, such as figures, appendices, equations, and line numbers for quoted text. Bracketed code was a marked feature of the Physical Sciences, occurring in formulae and enclosing symbols or abbreviations (7). Overall, students’ use of bracketed text appeared to reflect disciplinary conventions and reflected the genre goals of assignments by demonstrating knowledge, understanding and appropriate source use. Contrary to expectations, instances where the bracketed text seemed superfluous or adversely affected coherence were rare. We conclude by discussing what these findings mean for academic writing instruction. Reference Halliday, M. A. K., & Matthiessen, C. M. I. M. (2014). Halliday's introduction to functional grammar (4 ed.). Abingdon: Routledge. [less ▲]

Detailed reference viewed: 124 (9 UL)
Peer Reviewed
See detailTies that bind: Unearthing shared treasures between Luxemoburg and Brazil
Santana, Dominique UL; Luciano, Alessandra

Scientific Conference (2019, July 18)

Detailed reference viewed: 72 (2 UL)
Full Text
Peer Reviewed
See detailSoviet psychologist turned American educational entrepreneur: Lev Landa and “the repatriation” of the theory of programmed learning
Boretska, Viktoria UL

Scientific Conference (2019, July 18)

The theory of programmed instruction (PI), developed by a Harvard psychologist B. F. Skinner and heavily invested into in the spur of the Sputnik shock, became the toast of educational world during the ... [more ▼]

The theory of programmed instruction (PI), developed by a Harvard psychologist B. F. Skinner and heavily invested into in the spur of the Sputnik shock, became the toast of educational world during the decade of 1960s (Spaulding, 1967). Surprisingly for this peak decade of the Cold War, it also reached the Soviet Union: More than that, PI’s Soviet promoters did everything in order to secure place for research on programmed learning: PI was legitimated in front of thorough Communist Party ideologists who didn’t allow for any “Western import”, it was protected by the former military-turned-educational scientists, and established in the Institute of Cybernetics (Berg, 1961). During this time, PI was translated through and connected to a body of work and the network of psychological concepts that the discipline in the Soviet Union operated (Leontiev, 1959). Specifically, among others, educational psychologist and a devoted promoter of PI in the Soviet Union, Lev Landa, has developed the theory of algo-heuristic instruction and generically connected it to the theory of programmed learning (Landa, 1962). Soon in 1970s, Lev Landa expatriated to the United States and brought this Soviet version of programmed instruction back to its “homeland”. He established his company Landamatics in the heart of New York and started providing other companies’ middle management with educational services. His training constituted of a set of algorithms, units of information in a logically assembled and coherent way, very much like Skinner's conception of programmed learning decades ago. But this time, the algorithm became a certain externalized idealized structure of thought - that should be learnt and practised. Technically, Landa's enterprise represented the general and, to a large extent, shared belief of the time that is sometimes called the "Cold War rationality", the reinvention of the ideals of Enlightenment during the Cold War. The unique loop that programmed instruction travelled allows for a more profound understanding of the reinvention, the constant morphing of educational ideas in space and time. [less ▲]

Detailed reference viewed: 72 (3 UL)
Full Text
Peer Reviewed
See detailMining Android Crash Fixes in the Absence of Issue- and Change-Tracking Systems
Kong, Pingfan UL; li, li; Gao, Jun et al

Scientific Conference (2019, July 15)

Android apps are prone to crash. This often arises from the misuse of Android framework APIs, making it harder to debug since official Android documentation does not discuss thoroughly potential ... [more ▼]

Android apps are prone to crash. This often arises from the misuse of Android framework APIs, making it harder to debug since official Android documentation does not discuss thoroughly potential exceptions.Recently, the program repair community has also started to investigate the possibility to fix crashes automatically. Current results, however, apply to limited example cases. In both scenarios of repair, the main issue is the need for more example data to drive the fix processes due to the high cost in time and effort needed to collect and identify fix examples. We propose in this work a scalable approach, CraftDroid, to mine crash fixes by leveraging a set of 28 thousand carefully reconstructed app lineages from app markets, without the need for the app source code or issue reports. We developed a replicative testing approach that locates fixes among app versions which output different runtime logs with the exact same test inputs. Overall, we have mined 104 relevant crash fixes, further abstracted 17 fine-grained fix templates that are demonstrated to be effective for patching crashed apks. Finally, we release ReCBench, a benchmark consisting of 200 crashed apks and the crash replication scripts, which the community can explore for evaluating generated crash-inducing bug patches. [less ▲]

Detailed reference viewed: 99 (8 UL)
Full Text
Peer Reviewed
See detailWind music and scholarship. IGEB and WASBE
Sagrillo, Damien UL

Scientific Conference (2019, July 13)

Detailed reference viewed: 108 (5 UL)
Full Text
See detailRecent Activities on Tristan da Cunha Island: Geodetic Installations, Local Tie Measurements and their Analysis
Teferle, Felix Norman UL; Hunegnaw, Addisu UL; Backes, Dietmar UL et al

Scientific Conference (2019, July 11)

During 2017 a team from the University of Luxembourg and the National Oceanography Centre, Liverpool, established a permanent Global Navigation Satellite System (GNSS) station and two new tide gauges on ... [more ▼]

During 2017 a team from the University of Luxembourg and the National Oceanography Centre, Liverpool, established a permanent Global Navigation Satellite System (GNSS) station and two new tide gauges on Tristan da Cunha Island in the South Atlantic Ocean. These installations were funded through various projects at both collaborating institutions under the umbrella of the International GNSS Service (IGS) Tide Gauge Benchmark Monitoring (TIGA) Working Group and the Global Geodetic Observing System (GGOS) focus area on Sea Level Change, Variability and Forecasting. While this was the first scientific installation of a GNSS station on the main island within the Tristan da Cunha archipelago, IGS station GOUG, located on Gough Island which lies 412 km to the south, has been in operation since 1998. Unfortunately GOUG was decommissioned in 2018. Sea level observations on Tristan da Cunha have a longer history than GNSS with various tide gauges having been in operation since 1984. Tristan da Cunha also hosts a Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS) station which was established in 2012 after a previous installation was upgraded and moved to the current site. The antenna TCTA is located on the concrete monument of the previous DORIS antenna. Furthermore, in order for future International Terrestrial Reference Frame (ITRF) computations to fully benefit from the proximity of the sensors, the geodetic ties between the respective antennas (and reference markers in case of the tide gauges) need to be determined at the millimeter level using various terrestrial surveying methods and a local benchmark network. This contribution provides details of the activities on Tristan da Cunha including the installations, the established benchmark network, the terrestrial surveys of the geodetic ties and the analysis of these measurements in order to geometrically link the GNSS and DORIS antennas to each other as well as to the tide gauges. [less ▲]

Detailed reference viewed: 78 (9 UL)
Full Text
Peer Reviewed
See detailWHY IS THE MARKET SKEWNESS-RETURN RELATIONSHIP NEGATIVE?
Lehnert, Thorsten UL

Scientific Conference (2019, July 09)

Detailed reference viewed: 110 (11 UL)
Peer Reviewed
See detailNamenskunde – Gender(re)konstruktionen in Autobiographien von Transpersonen
Artuso, Sandy Kathy UL

Scientific Conference (2019, July 05)

Detailed reference viewed: 185 (4 UL)
Full Text
Peer Reviewed
See detailCharacterisation of demountable shear connector systems in composite beams
Kozma, Andras UL; Odenbreit, Christoph UL; Braun, Matthias Volker UL

Scientific Conference (2019, July 04)

Reusable structures can contribute to a resource-efficient low-carbon future on the basis of the principles of the circular economy. This paper presents a comparison of different demountable shear ... [more ▼]

Reusable structures can contribute to a resource-efficient low-carbon future on the basis of the principles of the circular economy. This paper presents a comparison of different demountable shear connector systems that facilitate recyclability and reusability of steel-concrete composite structures with the performance of traditional ones. In the Laboratory of the ArcelorMittal Chair of Steel and Façade Engineering at the University of Luxembourg 15 push-out tests and 2 full-scale beam tests have been carried out using different bolted shear connection systems suitable for reuse after the end of life of the respective building. The analysed shear connector systems have been evaluated based on their resistance, slip capacity, stiffness, ductility and ease of fabrication, assembly and disassembly. The experimental work was supplemented by numerical simulations performed with the finite element software Abaqus®. The developed numerical models were validated against the experimental observations. The experimental and numerical results provide information for future design guidance concerning the use of demountable shear connectors in composite beams. [less ▲]

Detailed reference viewed: 162 (12 UL)
Full Text
Peer Reviewed
See detailInformation Content of Systematic and Idiosyncratic Risk Disclosure
Weber, Véronique UL; Muessig, Anke UL

Scientific Conference (2019, July 04)

Detailed reference viewed: 53 (7 UL)
Peer Reviewed
See detailStatement of the Board on Cultural and Ethnic Diversity towards intercultural and individual Diversity
De Ponte, Ulrike; Albert, Isabelle UL; Žegura, Iva

Scientific Conference (2019, July 03)

Cultural and individual diversity is getting more and more part of the daily work of each psychologist nowadays, but still this issue is less or insufficiently addressed in the study programmes all over ... [more ▼]

Cultural and individual diversity is getting more and more part of the daily work of each psychologist nowadays, but still this issue is less or insufficiently addressed in the study programmes all over Europe. Therefore, psychologists work repeating in situations of the quality of a cultural overlap being not or insufficient prepared for this yet. The psychologists’ core work of understanding and supporting people from a psychological point of view lacks knowledge as well as the performance of taking in account multiple and differentiated perspectives. The conclusion is: The subject Intercultural psychology needs to be mandatorily included into the curricula of study programmes of Psychology and this already on Bachelor levels. This joint-symposium is supposed to aim in working groups after the input-presentations in order to collect all kind of psychologists’ views on the needs that are seen out of the view of the divers working fields of psychologists. [less ▲]

Detailed reference viewed: 80 (1 UL)
Peer Reviewed
See detailElder Care in the Context of Migration
Albert, Isabelle UL; Kretschmer, Mirjam; Malerba, Angela et al

Scientific Conference (2019, July 03)

Background: Demographic changes related to ageing and migration are key societal issues of our days. Cultural diversity in elder care will increase considerably in the next years especially in Northern ... [more ▼]

Background: Demographic changes related to ageing and migration are key societal issues of our days. Cultural diversity in elder care will increase considerably in the next years especially in Northern and Western European countries due to a large share of first generation immigrants from the 1950s to 1970s. Culture-specific needs, expectations and behavioral tendencies become particularly salient in times of frailty. Cultures differ in how they arrange old age care and intergenerational co-residence patterns. When families migrate from a more collectivist, family-oriented to a more individualist cultural context, the question arises in how far traditional care patterns from the country of origin are retained or adapted to the host cultural context. Ageing migrants have been found to be more reluctant regarding formal care due to cultural, religious or language issues which might put specific pressure on their close family members who are often responsible for care arrangements, even if not providing hands-on care. Objectives: The aim of the present study was to examine how established formal assistance should be modified in order to fit the special needs of both informal caregivers and care receivers with migration background. For this purpose, we will draw on two sub-studies: a) a qualitative study with n = 3 in-depth expert-interviews in the field of elder care and migration, and b) a survey in a daycare center with a large population of elder care receivers with migrant background. Results/Discussion: Preliminary results show different starting points for a culture-sensitive adaptation of the services. First, as the existence of help services is often unknown to migrants, it is important to provide low-threshold information, involving multipliers. Second, an important aspect is the culture-sensitive training of staff, increasing their awareness of cultural aspects in care and introducing an individualized as well as relationship-oriented approach. Finally, the exchange of caregivers with other concerned turned out to be a helpful resource and therefore it shall be facilitated and supported by formal services. A structural integration of cultural sensitive care services in the existing elder care system is highly suggested in order to meet the future challenges. [less ▲]

Detailed reference viewed: 82 (0 UL)
Peer Reviewed
See detailTranslanguaging as a pedagogy, a practice or a strategy? Examples from a preschool and a primary school class in Luxembourg
Kirsch, Claudine UL; Degano, Sarah UL; Mortini, Simone UL

Scientific Conference (2019, July 01)

The concept of translanguaging has been continuously redefined in education, psycholinguistics and sociolinguistics, which has led to some loss of meaning. Regarding teacher translanguaging, studies show ... [more ▼]

The concept of translanguaging has been continuously redefined in education, psycholinguistics and sociolinguistics, which has led to some loss of meaning. Regarding teacher translanguaging, studies show that it has been used as a strategy to further comprehension and learning, and as a pedagogy. The latter recognizes the existence of multiple languages in class and leverages the students’ semiotic system to make meaning and learn (García et al. 2017). Translanguaging has thereby been understood either as a resource-oriented pedagogy that challenges traditional conceptualizations of bilingualism and language learning, or as a pedagogy that fights social inequalities. Most research studies adopt the first view (Poza, 2017). The present paper combines two longitudinal doctoral studies and investigates the ways in which a preschool and a primary school teacher use translanguaging in their classes in Luxembourg. Drawing on interviews and observations, the findings show that the preschool teacher implemented a translanguaging pedagogy. She planned for the use of several languages, opened translanguaging spaces, and systematically translanguaged where she believed it would support learning (Kirsch et al. submitted). By contrast, the primary school teacher used translanguaging as a pedagogical strategy. She used the curricular languages and only translanguaged to support particular students. These differences are explained by the curriculum and the preschool teacher’s attendance of a professional development course. The findings contribute to our understanding of possible ways of implementing translanguaging as a pedagogy. [less ▲]

Detailed reference viewed: 178 (19 UL)
Full Text
Peer Reviewed
See detailTranslanguaging Course for Teachers
Aleksic, Gabrijela UL; Bebic-Crestany, Dzoen

Scientific Conference (2019, July 01)

Amongst the many terms to describe the natural linguistic experiences of bilinguals, translanguaging is standing out as the socio-linguistic theory that consciously recognises a unitary linguistic ... [more ▼]

Amongst the many terms to describe the natural linguistic experiences of bilinguals, translanguaging is standing out as the socio-linguistic theory that consciously recognises a unitary linguistic repertoire of bilinguals. Translanguaging is used without regards to boundaries imposed by socio-politically constructed named languages and the unnatural differentiation of various forms of communication. The extensive research of many scholars, most notably by Li Wei and Ofelia García, confronts the social and educational suppression of minorities’ languages and cultures in schools. Their analyses and proposed solutions for social justice, therefore, serve as the theoretical and pedagogical basis of our research in Luxembourg’s multilingual education. The understanding that bilinguals translanguage naturally in conversation and for sense- and meaning-making purposes has also been shown in Luxembourg: 64% of four-year olds in Luxembourg do not speak Luxembourgish and translanguaging happens naturally. Research also shows that students of minority groups generally underperform at school. The implementation of translanguaging in Luxembourg’s multilingual education would therefore enable a better development of school and home language, metalinguistic awareness, linguistic tolerance, socio-emotional development and multilingual identity. To address the challenges of multilingual education in Luxembourg, we firstly offer a professional development (PD) course that aims to help teachers take a translanguaging stance, vital for its success. Secondly, we adapt the general translanguaging pedagogical methodology to incorporate home languages in teachers’ daily classroom activities. Our project has been supported by the Luxembourg National Research Fund* to deliver 8 sessions from the Translanguaging guide developed at the City University of New York. Given the local multilingual context, introducing translanguaging and adapting the guide is a challenge for us as researchers. We will use quantitative and qualitative methods to assess the success of the PD and better understand translanguaging as a theory, practice and pedagogy. [less ▲]

Detailed reference viewed: 148 (8 UL)
Full Text
Peer Reviewed
See detailYes, we can! Mining Arguments in 50 Years of US Presidential Campaign Debates
Haddadan, Shohreh UL; Villata, Serena; Cabrio, Elena

Scientific Conference (2019, July)

Political debates offer a rare opportunity for citizens to compare the candidates’ positions on the most controversial topics of the campaign. Thus they represent a natural application scenario for ... [more ▼]

Political debates offer a rare opportunity for citizens to compare the candidates’ positions on the most controversial topics of the campaign. Thus they represent a natural application scenario for Argument Mining. As existing research lacks solid empirical investigation of the typology of argument components in political debates, we fill this gap by proposing an Argument Mining approach to political debates. We address this task in an empirical manner by annotating 39 political debates from the last 50 years of US presidential campaigns, creating a new corpus of 29k argument components, labeled as premises and claims. We then propose two tasks: (1) identifying the argumentative components in such debates, and (2) classifying them as premises and claims. We show that feature-rich SVM learners and Neural Network architectures outperform standard baselines in Argument Mining over such complex data. We release the new corpus USElecDeb60To16 and the accompanying software under free licenses to the research community. [less ▲]

Detailed reference viewed: 137 (9 UL)
Full Text
See detailA DEM approach for modeling biomass fast pyrolysis in a double auger reactor
Qi, Fenglei UL

Scientific Conference (2019, July)

Thermochemical conversion of biomass via fast pyrolysis process is a promising way to produce renewable fuels and chemicals. In this paper, an extended discrete element method (DEM) is developed to ... [more ▼]

Thermochemical conversion of biomass via fast pyrolysis process is a promising way to produce renewable fuels and chemicals. In this paper, an extended discrete element method (DEM) is developed to predict the biomass fast pyrolysis process in a double auger reactor, which is described as a reacting granular flow. The thermodynamic state of each particle is properly predicted with an addition of a heat transfer model and a reaction model on top of the traditional DEM method. The results suggest that the predictions of the thermochemical decomposition kinetics of biomass components are consistent with the experimental observations. The results also indicate that the fast pyrolysis in the reactor is controlled by the heat transfer process. Any operating condition variation in favor of enhancing heat transfer is beneficial to the fast pyrolysis process and vice versa. [less ▲]

Detailed reference viewed: 137 (9 UL)
Full Text
Peer Reviewed
See detailEquations to predict the shear connection capacity of composite beams with slender profiled steel sheeting
Odenbreit, Christoph UL; Vigneri, Valentino UL; Lam, Dennis

Scientific Conference (2019, July)

The rules of EN1994-1-1 for shear connections in composite beams with deep profiled sheeting sometimes lead to an overestimation of the load bearing capacity of the respective shear connection. The ... [more ▼]

The rules of EN1994-1-1 for shear connections in composite beams with deep profiled sheeting sometimes lead to an overestimation of the load bearing capacity of the respective shear connection. The estimation of the impact of the sheeting shape on the calculated connection resistance is based on test results from the late seventies until the early nineties. Meanwhile, new products have appeared on the market with the target to reduce the volume and weight of the concrete in order to maximize the slab efficiency. However, the corresponding effects onto the shear connection have been underestimated because the use of deeper and more narrow deck rib lead to a more slender profile with a changed failure behaviour. Instead of the shearing-off failure of the stud, a combination of concrete cone failure and plastic bending of the stud – with one or two plastic hinges - was identified in laboratory tests. Based on the observed failure mechanisms, a new mechanical model with respective analytical equations for the shear resistance of headed studs in profiled steel sheeting was proposed. The new model extends the yield hinge mechanism, which was developed by Lungershausen [1], to more precisely predict the formation of the number of yield hinges depending on the mechanical and geometrical properties with the support of a finite element model. The complete equations consider the geometry of the stud and the steel decking as well as the material strengths of the stud and concrete. The statistical evaluation shows a good accordance with the developed model and analytical design equations. This contribution presents the new design equations and their background describing the mechanical model, the numerical study and statistical evaluation of push-out test results. [less ▲]

Detailed reference viewed: 108 (25 UL)
See detailAmbitious Amateurs – The Greater Region's Amateur Film Clubs in the long 1960s
Wack, Julia UL

Scientific Conference (2019, July)

Ambitious Amateurs aims to investigate the mass taste of its time through the lens of the participatory cultural practice of filming. The film makers were consumers of a medium they were co-creating ... [more ▼]

Ambitious Amateurs aims to investigate the mass taste of its time through the lens of the participatory cultural practice of filming. The film makers were consumers of a medium they were co-creating themselves, largely producing for a circle of peers. The aesthetic form of these films and genres, the excess of meaning, as well as the moral political ideals represent central axes of the analysis. Additionally, relations between the club members and their activities in national umbrella associations, collaborations, as well as contexts of transnational encounters (i.e. UNICA, the international association of amateur film clubs) shall be further observed. This is being executed on the examples of selected clubs in bordering locations in the ‘Greater Region’: Luxembourg, Wallonia (Belgium), Lorraine (France) and Saarland (Germany) - an artificial construct of an economic trade union within the European Union on the one hand, with a shared cultural heritage shaped by the coal and steel industries and their demise on the other. Besides archive research and Oral History, the film documents themselves are the core piece of the analysis. The topic is of particular relevance for general Culture and Media History, due to the historical evolution of censorship and auto-censorship tendencies regarding sexual permissiveness, political militancy or religious statements in the long 1960s. On the particular European transnational level, the material is investigated considering the issue of Americanisation, respectively the rejection of the latter within the discourse of European film creators and the topical press. The international comparison additionally facilitates the display of national specificities and diverse temporalities within (Western)Europe. It currently appears that the demographics of the clubs were transnationally rather homogenous. The comparison of topics, genres, visual and technical styles the authors were interested in and the notable exceptions within the scope, are thus mirroring the zeitgeist of the research period. [less ▲]

Detailed reference viewed: 62 (0 UL)
Full Text
See detailTechnological risks and political challenges: the emergence of Luxembourg’s satellite policy
Danescu, Elena UL

Scientific Conference (2019, June 29)

In the early 1970s, in a bid to diversify its economy – at that time primarily based on a declining steel industry and a still nascent international financial centre –, the Luxembourg government decided ... [more ▼]

In the early 1970s, in a bid to diversify its economy – at that time primarily based on a declining steel industry and a still nascent international financial centre –, the Luxembourg government decided to invest in the country’s audiovisual sector and to pursue a policy to develop telecommunications satellites that would be used to broadcast European television programmes. This ambitious yet risky objective represented a major challenge in five specific areas: in technological terms (choosing to invest in medium-range rather than the more dominant long-range satellites), in political terms (opting for US hardware and technology at the expense of the European leaders in the field, France and Germany), and with regard to culture (favouring the broadcast of programmes in English over those in French and German), management (the satellites were run via a private company with the government as the only shareholder), and standardisation, regulation and competition (especially at pan-European level). The Société Européenne des Satellites (SES) was finally set up in 1985, and Luxembourg’s first satellite for television broadcasts (GDL/ASTRA) was launched in 1987. Drawing on new sources, this paper looks back at the emergence of the GDL/ASTRA project from a historical perspective, highlighting the main political, financial, technological and regulatory hurdles that had to be overcome, the influence of the project on Luxembourg’s relationship with the USA and with EEC Member States (especially France and Germany but also the UK, which at that time was embarking on the accession process) and its role in the completion of a common market for new media technologies and ultimately in the development of a European audiovisual area. The impact of the policy as a driver for the financial centre (especially the Luxembourg Stock Exchange) and for various niche markets will also be emphasised. [less ▲]

Detailed reference viewed: 68 (0 UL)
Peer Reviewed
See detailLandscape typology of urban forest ecosystem services across European urban areas
Boura, Marlène Delphine Fabienne UL; Caruso, Geoffrey UL

Scientific Conference (2019, June 28)

Urban areas exhibit a large variety of patterns which may affect the negative externalities of human settlements on ecosystems. Ecosystem Services (ES) can help assessing the urban pressure on the ... [more ▼]

Urban areas exhibit a large variety of patterns which may affect the negative externalities of human settlements on ecosystems. Ecosystem Services (ES) can help assessing the urban pressure on the environment and its impact on the well-being of inhabitants. Compactness or densities have often been associated to potential ES. Yet, the effects of the relative spatial arrangement of vegetation, forests and water bodies, with respect to the urban lands - which are source of anthropogenic CO2 emissions - on potential ES are still not systematically analysed. In this work we propose a typology, for about 800 European urban areas (>50,000 inhabitants) based on the intra-urban structure of cities and the associated ES potentials. The GMES/Copernicus Urban Atlas 2012 database provides a comparable definition of urban area and land use categories, necessary to a systematic cross-European analysis. More particularly, we investigate the share of different land uses and the distance between human settlements, forests and the other vegetated lands as well as their relative spatial distribution within urban settlements. We then use spatial metrics as proxies for urban ES associated with urban forests – e.g., micro climate regulation (air cooling, shade), air pollution removal (canopy), rainwater runoff (impervious lands). The typology is created using an unsupervised machine learning approach (clustering) with standardized spatial metrics as input data. Different urban “forest cultures” across the continent are observable. Urban areas around the Mediterranean sea - facing warmer temperatures - attribute significantly more space to herbaceous lands (10 to 70%), but generally less than 10% for forests. Transport networks and infrastructures are more present along the axe going from central UK, to Italy and on the east coast of Spain (5 to 9%). Similarly, Industrial built up lands are more present along this axe, including west Germany, Romania and the east coast of Spain (5 to 22%). [less ▲]

Detailed reference viewed: 67 (3 UL)
Peer Reviewed
See detail“I’m much better off…” - Comparative Processes and Future Intentions of Elder Portuguese Immigrants in Luxembourg
Albert, Isabelle UL

Scientific Conference (2019, June 28)

Ageing and migration have become key issues in many European countries as a large number of first generation immigrants are approaching retirement age in the next years. Focusing on elder Portuguese ... [more ▼]

Ageing and migration have become key issues in many European countries as a large number of first generation immigrants are approaching retirement age in the next years. Focusing on elder Portuguese immigrants in the Grand Duchy of Luxembourg, the present study had the aim to explore the roles of social and temporal comparisons for future intentions to stay in the receiving country, return to the country of origin or commute between both. Whereas earlier studies have examined the roles of social or cultural links, economic or health aspects, we focused here on the participants’ personal evaluation of their migratory project by asking them to evaluate their current situation compared with the past and with peers. A sample of N = 109 Portuguese first generation immigrants (49.5% female; average age: M = 55.35, SD = 7.42) who had been living in Luxembourg for about M = 30.69 (SD = 8.55) years were interviewed by use of a standardized questionnaire. Analyses showed that about half of participants preferred to stay in Luxembourg, whereas the remainder planned to return to Portugal or to commute. The appraisal of the current (vs. past) situation was significantly more positive for those who planned to stay or commute compared to those who wanted to return after retirement. Interestingly, both those who planned to return and those who wanted to stay engaged more frequently in social or temporal comparisons than those who preferred to commute. Results will be discussed taking into consideration regulatory processes of subjective well-being and different migration experiences. [less ▲]

Detailed reference viewed: 66 (2 UL)
Full Text
Peer Reviewed
See detailOn the single-peakedness property
Devillet, Jimmy UL

Scientific Conference (2019, June 28)

Detailed reference viewed: 83 (4 UL)
Peer Reviewed
See detailForced migrants in Luxembourg: an LE approach to linguistic integration
Kalocsanyiova, Erika UL

Scientific Conference (2019, June 28)

This paper outlines the core contributions that a linguistic ethnography (LE) approach can make to forced migration and integration research. LE provides multiple tools for capturing the complexity and ... [more ▼]

This paper outlines the core contributions that a linguistic ethnography (LE) approach can make to forced migration and integration research. LE provides multiple tools for capturing the complexity and transient character of the real social environments in which forced migrants integrate. After summarising the main arguments of the literature which examines the language–displacement nexus, this contribution moves on to discuss the nature and focus of the proposed approach. It then turns to specific examples from a two-year LE research project that addressed the impact of multilingualism on forced migrants’ trajectories in Luxembourg. [less ▲]

Detailed reference viewed: 71 (4 UL)
See detailExpansion nach Belgien als Verwaltungstätigkeit: der Kölner Beamte Franz Thedieck im NS
Brüll, Christoph UL

Scientific Conference (2019, June 28)

Detailed reference viewed: 145 (1 UL)
See detailN point Virasoro algebras are multi-point Krichever Novikov type algebras
Schlichenmaier, Martin UL

Scientific Conference (2019, June 28)

Detailed reference viewed: 88 (0 UL)
See detailA small country in a global context: the case of Luxembourg’s cultural policy
Spirinelli, Fabio UL

Scientific Conference (2019, June 27)

This paper focuses on a small nation state instead of a big country to provide a different perspective on cultural policy history. Due to its small size, the Grand Duchy of Luxembourg has been influenced ... [more ▼]

This paper focuses on a small nation state instead of a big country to provide a different perspective on cultural policy history. Due to its small size, the Grand Duchy of Luxembourg has been influenced by the cultures of its neighbouring countries and looked beyond its national boundaries for inspirations. Members of the political, cultural and economic elite studied abroad and brought ideas and transnational contacts to Luxembourg. Hence, Luxembourg’s national cultural policy needs to be examined within the international context. Throughout the cultural policy of the 20th century, we discover numerous examples of how European and international developments have affected Luxembourg’s cultural policy. During the interwar period, a national era initiated by the First World War, the increasingly interventionist state promoted a national culture alongside a high culture imported from France and Germany. Intellectuals developed the idea that Luxembourgish culture was created by the mixture of French and German cultures. For its cultural policy, the government took inspiration from examples abroad: Luxembourg’s first law on the protection of national monuments and sites (1927) was influenced by a French law of 1913. In the 1970s, the development of a new cultural policy around concepts such as democratization of culture cannot be understood without the developments in other countries. From the 1980s onwards, European and global developments have increasingly influenced Luxembourg’s cultural policy. The promotion of the creative industries, for instance, is the most recent example of how Luxembourg follows a global trend. This paper has several aims. First, it wishes to analyse how Luxembourg has adapted models and reacted to developments abroad. Second, it wants to investigate to what extent Luxembourg has shifted its geographic horizon when looking for models and ideas. Third, it advocates for a cultural policy history that does not limit itself to national borders. [less ▲]

Detailed reference viewed: 74 (2 UL)
Peer Reviewed
See detailChanges in Demography and Resulting Changes in Citizenship Law: The Case Study of Luxembourg
Wronska, Iwona; Murdock, Elke UL

Scientific Conference (2019, June 27)

The vast majority of democratic theory assumes the need for widespread political participation. The right to vote constitutes the most essential political right but in the era of migration the idea of ... [more ▼]

The vast majority of democratic theory assumes the need for widespread political participation. The right to vote constitutes the most essential political right but in the era of migration the idea of universal suffrage is far from being realized. The Grand Duchy of Luxembourg within its current borders is the result of 19th century diplomacy. In the space of less than 150 years the population of this state more than doubled - largely attributable to immigration. Today, 48% of the population are foreigners. The history of the creation of the Grand Duchy and the Law on Luxembourg Nationality are closely intertwined – the latter having undergone several changes – reflecting historic circumstances. The evolution of the Law on Luxembourgish Nationality and the discussions around “what constitutes a Luxembourger” illustrate the changes in perception of “Luxembourg nationality”. The underlying fundamental question is whether naturalization is the mid – or endpoint of successful integration into the host society. In this paper we will outline the different phases of the Luxembourg Law on Nationality, starting with the period of the French civil Code and ending with the current amendments of the naturalization law. This paper reflects the relation between migration and changes in the naturalization law in Luxembourg. The authors show how successive Luxembourgish governments have accommodated citizenship rights of foreign nationals, but are constrained by political groups defending national preferences. Overall, Luxembourg can be described as an immigration success story, facing the future challenge of accommodating all groups living in Luxembourg. [less ▲]

Detailed reference viewed: 61 (2 UL)
See detailOpening Remarks / Chair / Program Chair
Schafer, Valerie UL

Scientific Conference (2019, June 27)

Decoding Europe. Technological Pasts in the Digital Age. The conference will study – in an interdisciplinary way – the impact of digitisation on historical developments and the consequences of the digital ... [more ▼]

Decoding Europe. Technological Pasts in the Digital Age. The conference will study – in an interdisciplinary way – the impact of digitisation on historical developments and the consequences of the digital turn on the writing and shaping of European history. The Tensions of Europe (ToE) conference is organised biennially. ToE is an interdisciplinary community of scholars who study the shaping of Europe by paying attention to the role of technology and material culture. It welcomes fruitful interaction between historians of technology and scholars who study technology from all other fields of the humanities and the social sciences. [less ▲]

Detailed reference viewed: 73 (6 UL)
Full Text
See detailLaser polishing of Aluminum and Polyamide for dissimilar laser welded assemblies
Amne Elahi, Mahdi UL; Koch, Marcus; Plapper, Peter UL

Scientific Conference (2019, June 27)

Detailed reference viewed: 126 (6 UL)
See detailHistory of networks: evolution, issues, challenges
Schafer, Valerie UL

Scientific Conference (2019, June 26)

This conference described and analyzed the recent evolutions in the field of the history of Internet and of the Web, underlining new trends and challenges.

Detailed reference viewed: 75 (7 UL)
See detailRécits visuels de la Grande Guerre au Luxembourg : cent ans de manuels d'histoire
Camarda, Sandra UL; Scuto, Denis UL

Scientific Conference (2019, June 26)

Detailed reference viewed: 97 (8 UL)
Full Text
See detailLaser overlap joining from copper to aluminum and analysis of failure zone
Mathivanan, Karthik UL; Plapper, Peter UL

Scientific Conference (2019, June 26)

Joining of copper and aluminum sheets are very crucial for battery application. When joining from copper sheet, keyhole mode of welding is essential to overcome the reflectivity and melting threshold of ... [more ▼]

Joining of copper and aluminum sheets are very crucial for battery application. When joining from copper sheet, keyhole mode of welding is essential to overcome the reflectivity and melting threshold of copper. However, in dissimilar material interaction the resulting intermetallic (IMC) phases are brittle, which result in reduced performance.This paper analyses the joint with laser beam irradiated from the copper side (Cu on top). The idea is to distribute the intermetallic compounds inside the joint to obtain a ductile behavior. The zones of failure and the distribution of the intermetallic phase is studied. The microstructural analysis of the fusion zone and mechanical strength of the joint are presented. [less ▲]

Detailed reference viewed: 185 (16 UL)
See detailThe real problem with Rawisian reasonableness
Burks, Deven UL

Scientific Conference (2019, June 26)

Reactions to Rawlsian “reasonableness” range from its being “loaded” (Stout 2004: 184) or “chimerical” (Young 2005: 308) to “entirely circular” (Mulhall and Swift 2003: 483). Yet more critical reactions ... [more ▼]

Reactions to Rawlsian “reasonableness” range from its being “loaded” (Stout 2004: 184) or “chimerical” (Young 2005: 308) to “entirely circular” (Mulhall and Swift 2003: 483). Yet more critical reactions often employ external standards or equivocal senses of reasonableness to their detriment (Freeman 2004: 2045, 2063-5). In this paper, I put forward a narrow, immanent criticism whereon the two basic aspects of reasonableness are shown to be in tension: the “burdens of judgment” may give the person reason to disagree over the need to propose and to abide by a common basis of fair terms of cooperation. I proceed in two steps. First, I shall recall the two aspects of reasonableness and hold that their conjunction is necessary for a person to qualify as “reasonable”. In particular, this involves showing a biconditional: a person is reasonable if and only if the two basic aspects of reasonableness obtain. Secondly, I shall examine whether any burden gives reason to doubt the need to propose and to abide by a common basis of fair terms of cooperation. I find that each of the burdens, in its own way, leaves room to doubt whether reasonable persons in a well-ordered society would assent to such a need. For the first burden (complexity of evidence), the evidence backing the requirement of shared terms of cooperation defined ex ante is not obviously less complex than that contained in reasonable comprehensive doctrines. Regarding the second (relative weight of reasons), even supposing agreement on which reasons are relevant to deciding questions of justice, there may be still be disagreement over the relative priority of those reasons in deciding a given question. As to the third (conceptual indeterminacy and hard cases), such concepts as justice and fairness, cooperation and equality are all subject to the difficulties of identifying hard cases and probing a concept’s limits. Of the fourth (divergent total life experience), it is clear that, through her life experience, a person acquires a set of beliefs (political, moral, epistemological, religious, etc.) which could give the person reason to doubt or otherwise reject the first basic aspect of reasonableness, especially given its significant complexity. Finally, for the fifth burden (conflicting distinct normative considerations), persons may disagree over whether the first basic aspect in fact realizes these different considerations, the priority ordering to be fixed for such considerations and whether a common currency might be found so as to make such considerations commensurable, any of which may suffice for persons to be unable to reach agreement on the requirement, not simply on the reasons why it holds, but also on whether it holds at all. Thus, I parallel Clarke’s (1999: 639-41) claim that the burdens of judgment apply both to contractarianism’s “reasonable rejection procedure” and principles but do so from narrower, immanent grounds. This analysis yields two striking conclusions. First, public reason becomes looser and shifts to the domain of politics where one sees what public reasons others may in fact accept (Laden 2001). Seen from a different angle, one need not accept the idea that the first basic aspect and, hence, Rawlsian reasonableness are necessary conditions of political justification under conditions of reasonable pluralism (contra Krasnoff 2014: 696-7): rejecting this aspect and reasonableness in no way means that there can be no political justification under conditions of (reasonable) pluralism. Second, when conceiving justification and discourse, Rawls may be committed, despite himself, to accepting “reasonableness pluralism”, i.e. the view that there exist distinct, possibly irreconcilable accounts of reasonableness to which one may appeal when conceiving justification and discourse. Their combination may lead to a public reason liberalism framework which is at once looser and more actionable. [less ▲]

Detailed reference viewed: 62 (1 UL)
Full Text
Peer Reviewed
See detailWhat Is a Successful Career in Tourism and Hospitality Academia?
Gewinner, Irina UL

Scientific Conference (2019, June 25)

Detailed reference viewed: 21 (1 UL)
Full Text
Peer Reviewed
See detailBenefits, challenges, social learning and controversies around Local Food Systems
Reckinger, Rachel UL; Nemes, Gusztav; Lajos, Veronika

Scientific Conference (2019, June 25)

Objectives: Our WG touches upon three main elements among the themes of the conference: (1) innovation, (2) social justice and (3) knowledge production. Innovative local food systems and alternative food ... [more ▼]

Objectives: Our WG touches upon three main elements among the themes of the conference: (1) innovation, (2) social justice and (3) knowledge production. Innovative local food systems and alternative food networks, approached from a collaborative and participatory angle, bring about a cultural shift by associating prosumers through a renewed form of trust, reciprocity and community, thus reinforcing social and ecological justice. At the same time, such heterodox actors in the transition to more sustainable food systems create new forms of knowledge, that are contested, co-constructed and potentially conflictual – along with enabling or disabling policymaking and, often, in dialogue with research. Our main objective is in this topic to start the process of creating an edited special issue of a peer reviewed journal (Sociologia Ruralis, Studies of Agricultural Economics or similar) should raise from this WG. We invite researchers working in the area of (local) food systems, alternative food networks, short food supply chains and related topics (rural tourism, community supported agriculture, etc.). We consider both the benefits and possible conflicts/problems in the connected socio-economic, cultural and environmental processes and welcome theoretical papers and case studies, too. Topic: By welcoming case studies from all geographical areas, in a comparative manner, this Working Group’s aim is to address different understandings and dynamics happening within and around different types of Local Food Systems (LFS). Alternative food networks, local food systems and short food supply chains have long been viewed as a sustainable, green way of raising the value added and creating opportunities for sur/re-vival of rural economy and society. They induce many benefits in terms of environmental impact, cultural exemplification, ethical entrepreneurship, social justice or rural development. Conceptually, LFS can be understood as ‘local food for local people’, as for example in the Slow Food or the community supported agriculture (CSA) movements. They are then associated with low food miles, environmental protection (Jones 2002), enhanced social networks and revitalised local communities (Fenstra 1997). From a local economic development perspective, in particular when LFS produce high quality products, they can equally be considered as ‘local food for non-local people’, either transported to urban centres, or attracting flows of tourists into rural areas. Here LFS can still enhance local businesses, economic and rural development, yet social and environmental benefits (Guthman 2004) of such foodstuffs, marketed with the added value of environmental and social responsibility, are more difficult to trace. Therefore, besides benefits, we would also like to analyse potential dissonances, that the distinction between local or extra-local target groups help to identify – for instance: • established, certified organic producers might criticize non-certified yet organically producing CSAs as fragmenting an already minority market or showing a lack of solidarity by not contributing to organic labels; • when LFS end up producing high quality, expensive products, a dynamic of social exclusion might occur, favoring the wealthy; • enhanced local production, tourism, and visitor pressure can cause social, economic, and environmental degradation, multiplier effects do not always occur to build more businesses and sustain social and economic capital; • innovative alternative food networks tend to struggle with territorial competition over land and resources, but if they rely on external investments, they might additionally be confronted – more insidiously – with the risk of co-option by neoliberal corporate agendas. We welcome analyses focusing on negotiations and struggles among actors in a multifaceted foodscape, where some block and some enhance transitions. Viewing the relationships, interconnectedness and agency of niche innovations, local and non-local appropriations as well regime hegemonies opens up the theoretical perspective of contested knowledge claims. We look for questions and answers including: • How are dynamics of “knowing and growing food in a contested arena” (Goodman, DuPuis, Goodman, 2014) negotiated – sometimes in a mutually enhancing and locally beneficial way, sometimes in more conflictual ways? • What are the local and extra-local stakeholders’ (producers, intermediaries, customers, tourists) different and often conflicting interests and responsibilities in LFS? • What can we learn from the tensions and local problems of LFS in order to support relevant policies to solve current controversies within the sector? • How can rural sociologists use their knowledge and influence to support local rural stakeholders of LFS? [less ▲]

Detailed reference viewed: 247 (10 UL)
Full Text
Peer Reviewed
See detailCharacterizations and enumerations of classes of quasitrivial n-ary semigroups
Devillet, Jimmy UL; Couceiro, Miguel

Scientific Conference (2019, June 23)

Detailed reference viewed: 114 (8 UL)
Full Text
Peer Reviewed
See detailOverestimation of physical activity among young people: Does age and gender play a role?
Eckelt, Melanie UL; Hutmacher, Djenna UL; Steffgen, Georges UL et al

Scientific Conference (2019, June 22)

Background and purpose: Due to the continuous decrease of physical activity (PA) of people in industrialized countries (Kohl et al., 2012), PA behavior and its psychological foundations has become a key ... [more ▼]

Background and purpose: Due to the continuous decrease of physical activity (PA) of people in industrialized countries (Kohl et al., 2012), PA behavior and its psychological foundations has become a key issue in health-related research. Studies show that most people tend to overesti-mate their habitual PA (Skender et al., 2016), however, there is very little research on the role of demographic variables in this respect. Therefore, the aim of this study was to examine whether age and/or gender affect the (over)estimation of PA among children and adolescents. Methods: Data of 75 students (38 girls and 37 boys, 10 to 18 years) of various primary and sec-ondary schools were randomly included in the study. Habitual PA was assessed through an online self-report questionnaire (Schmidt et al., 2017) as well as by wearing an accelerometer (Acti-Graph GT3X-BT) over seven consecutive days. A multiple regression analysis was used to ana-lyze the impact of age and gender on the accuracy of PA estimation. Results: The students reported being active for at least 60 minutes on average on 4,0 ± 2,1 days per week, whereas the accelerometer data verify only 1,8 ± 1,6 days per week. Thus, a majority of 76% of the children and adolescents overestimated and 9% underestimated their PA. Almost 15% were correct in their PA estimation. However, results of the regression analysis indicate neither an effect of age ( = .003, p > .1) nor of gender ( = -.070, p > .1). Conclusions: Overestimation of PA is common not only among adults but also among children and adolescents. However, this misperception appears to be independent of age and gender, at least in the age group considered here. Future studies should examine further demographic and psychological variables in order to explain why most of the people significantly overestimate their habitual PA. [less ▲]

Detailed reference viewed: 290 (6 UL)
Full Text
Peer Reviewed
See detailThe Werner Report: Principles, Values and Challenges for a Europe Built through Currency
Danescu, Elena UL

Scientific Conference (2019, June 20)

The work of the Werner Committee, which in October 1970 resulted in a plan for an economic and monetary union (the Werner Report), was characterised by political and doctrinal differences between ... [more ▼]

The work of the Werner Committee, which in October 1970 resulted in a plan for an economic and monetary union (the Werner Report), was characterised by political and doctrinal differences between ‘economists’ and ‘monetarists’. At issue was the question of whether monetary integration was the means or the ultimate goal of economic integration. On one side, there were the ‘monetarists‘ (whose standard-bearers were the countries with weak currencies – France, Belgium and, to a certain extent, Italy), who argued for ‘institutions‘. The priority should be to set up institutions and lay down requirements to be met. After that, there would be a coordinating of economic policies, driven forward by concerted action on the single currency which would already exist. The only way to give any credibility to the prospect of monetary union and influence the behavior of players in the economy was to set a timetable and lay down some rules of conduct. On the other side were the ‘economists‘ (the countries with strong currencies – Germany and the Netherlands). According to them, a convergence of economic policies — monetary and budgetary policies — was vital and must come before the setting up of institutions. A single currency would come only at the end of the process, as the ‘finishing touch‘ to a harmonization which would already have been carried out. This dispute was ultimately resolved by the adoption of a parallel approach between economic cooperation and monetary coordination in the Member States, a principle of balance on the basis of which Pierre Werner (Prime Minister of Luxembourg and chairman of the expert committee) was able to secure a consensus. This paper makes extensive use of Pierre Werner’s previously unpublished archives and original interviews, adopting an interdisciplinary approach in order to analyse the negotiations within the Werner Committee by examining the relationships between the members of the group, the emergence of their views on EMU, their political commitment to a European currency, the similarities and differences between their ideas, their personal networks, the influence of the states they represented, their theoretical and methodological input and their contribution to the political consensus. The paper demonstrates how transnational, network-based cooperation led to the emergence of a monetary elite, which had a significant influence both on the transfer of political ideas and solutions within the Member States and also on the decision-making process at supranational level in the area of European economic and monetary integration in the 1970s. Elite transnational networks and the consensuses they reinforce, cultivate, and disseminate, are critical to our understanding of progress and change in world politics. [less ▲]

Detailed reference viewed: 138 (3 UL)
Peer Reviewed
See detail"Are you a boy or girl?" Who are the non-responders
Heinz, Andreas UL; Catunda, Carolina UL; van Duin, Claire UL et al

Scientific Conference (2019, June 20)

Background: In many studies, participants who do not state their gender are excluded from the analysis. This may be appropriate if they do not answer the questionnaire seriously. However, some ... [more ▼]

Background: In many studies, participants who do not state their gender are excluded from the analysis. This may be appropriate if they do not answer the questionnaire seriously. However, some participants may have understandable reasons for not reporting their gender, e.g. questioning their gender identity. Objective: How many students and which students do not answer the question on gender? Methods: HBSC 2018 raw data from Ireland, Luxembourg, Belgium and France are compared. To explore the reasons for non-response, we divided the participants into 3 groups: 1. Responders answered both sociodemographic questions (age and gender) 2. age non-responders did not answer the question on age. 3. Gender non-responders answered the question on age, but not the one on gender. Results: Between 0.8% (Ireland) and 1.2% (Luxembourg) of participants did not report their gender. About half of them did not answer the age question either. However, the other half belong to the group of gender non-responders and this group is disadvantaged compared to responders: they report lower life satisfaction, lower self-rated health, more health complaints, less peer support and their WHO-5 Well-being score is lower. Not answering the question on gender is rare. If the participants answered the question on age, but not the question on gender, then the variable gender is missing not at random. Implication: The question arises whether the group of gender non-responders should be included in the analysis and whether the question on gender should be asked differently in the future. [less ▲]

Detailed reference viewed: 236 (16 UL)
Full Text
Peer Reviewed
See detailTaxation in the BE-NE-Lux countries – a comparative analysis
Danescu, Elena UL

Scientific Conference (2019, June 20)

The aim of this paper is to perform a comparative historical analysis of the development and specific characteristics of taxation in Luxembourg, as developed in a multidimensional context – national ... [more ▼]

The aim of this paper is to perform a comparative historical analysis of the development and specific characteristics of taxation in Luxembourg, as developed in a multidimensional context – national (Luxembourg), regional (relations with traditional partners – Belgium and the Netherlands but also Germany and France), European (ECSC, EEC and EU) and international (OECD, GATT/WTO) – in the second half of the 20th century. The two aspects of taxation will be addressed: direct taxation (a prerogative of states) and indirect taxation (subject to international regulation). The time frame stretches from the end of the war (1944) to the Maastricht Treaty (1992). [less ▲]

Detailed reference viewed: 117 (1 UL)
See detail„What’s a normal weight?“ – Weight assessment standards in Origin- and Receiving Country and Immigrant Adolescents’ Weight-Status Self-Assessment
Kern, Matthias Robert UL; Heinz, Andreas UL; Stevens, Gonneke et al

Scientific Conference (2019, June 19)

Background: Many young people struggle with correctly assessing their weight-status, often leaving over- or underweight to go unnoticed thereby preventing adequate intervention. The prevalence of weight ... [more ▼]

Background: Many young people struggle with correctly assessing their weight-status, often leaving over- or underweight to go unnoticed thereby preventing adequate intervention. The prevalence of weight-status misperception differs considerably cross-nationally, indicating that individual weight-status assessment is informed by culturally transmitted standards of evaluation. For adolescents with a migration background, this brings up the problem of multiple frames of reference, as their perception of weight-status may be influenced by different cultural standards. Objective: We investigate the extent to which the assessment of one's own weight-status is based on standards of the heritage country or the receiving country. Methods: Data are retrieved from the 2014 Health Behaviour in School-Aged Children study. The cross-national design of the study enabled us to aggregate weight-evaluation standards for 41 countries and subsequently identify a large sample of 8132 immigrant adolescents in 23 receiving countries from 41 heritage countries. The influence of heritage- and receiving country standards of evaluation was assessed using cross-classified multilevel models. Results: Descriptive analyses reveal considerable differences in weight-evaluation standards between the countries. We find evidence of a significant influence of both heritage- and receiving culture standards of evaluation, with a stronger impact of receiving culture standards. Stratified analyses reveal a stronger influence of heritage culture standards among first- than among second-generation immigrants, and a stronger influence of receiving culture standards among second- than among first-generation immigrants. Conclusions: The results corroborate our expectations regarding the persistency of cultural standards and help to understand inter-ethnic differences in weight-status assessment. [less ▲]

Detailed reference viewed: 119 (11 UL)
Peer Reviewed
See detailTrajectories of Steel – The Making Of A Transnational Migrant Community
Santana, Dominique UL

Scientific Conference (2019, June 18)

Detailed reference viewed: 73 (4 UL)
See detailPhase field fracture model for viscoplastic materials in large deformations
Kabore, Brice Wendlassida UL; Loew, Pascal Juergen UL; Peters, Bernhard UL

Scientific Conference (2019, June 13)

Phase-field modeling approach to material fracture and damage has received a growing interest among researchers. It has proven to be an effective way to address crack related discontinuities in continuum ... [more ▼]

Phase-field modeling approach to material fracture and damage has received a growing interest among researchers. It has proven to be an effective way to address crack related discontinuities in continuum mechanics. Also, it solves the problem related to tracking the fracture surface by simply representing the fracture phase with a continuous field variable. Recently, phase-field fracture models have been extended to finite deformations, crack nucleation and applied to complex material behaviors such as plasticity and viscoplasticity. In this contribution we describe a viscoplastic model coupled with a phase-field dynamic fracture model in a large strain formulation. The model include damage, history, rate and temperature dependent behavior. A finite element implementation is presented in a staggered time integration. Moreover, we address the crack closure and crack surfaces interpenetration taking into account tension-compression strength asymmetry. Performance of the model on dynamic crack propagation are presented. [less ▲]

Detailed reference viewed: 139 (8 UL)
See detailSSM Sanctions between Administrative and Criminal Law
Allegrezza, Silvia UL

Scientific Conference (2019, June 13)

Detailed reference viewed: 153 (3 UL)
Full Text
See detailLe rôle du Pôle Européen de Développement entre le Luxembourg, la Belgique et la France dans l’émergence d’un territoire transfrontalier
Pigeron-Piroth, Isabelle UL; Belkacem, Rachid

Scientific Conference (2019, June 07)

Au pays des trois frontières (Athus en Belgique, Longwy en France, Pétange au Luxembourg), ces territoires ont connu une histoire commune du déclin industriel. Dans le cadre de programme européen de ... [more ▼]

Au pays des trois frontières (Athus en Belgique, Longwy en France, Pétange au Luxembourg), ces territoires ont connu une histoire commune du déclin industriel. Dans le cadre de programme européen de reconversion de ces espaces, l'implantation d'un pôle européen de développement au milieu des années 1980, a constitué le principal instrument de reconversion de ces territoires. Après 20 ans de fonctionnement, le PED a produit différents effets sur la structuration de ces territoires transfrontaliers : une diversification inégale de part et d'autre des frontières du tissu productif local, une accélération des mobilités transfrontalières avec le développement du travail frontalier, un accroissement de la population locale avec de nouveaux profils sociologiques qui marque de nouvelle logique de mobilité résidentielle, ... Si le PED a permis d'amortir fortement la crise du système productif local, il a néanmoins contribué à diversifier les trajectoires de développement territorial de part et d'autre des frontières. On voit se dessiner au pays des trois frontières, un nouveau modèle de segmentation territoriale traduisant la juxtaposition de zones d'activités dynamiques d'un côté de la frontière avec des territoires à vocation résidentielle de l'autre côté de la frontière. [less ▲]

Detailed reference viewed: 89 (3 UL)
Peer Reviewed
See detailNetworks and Governance of Local Food Systems. The case of Food Policy Councils
Reckinger, Rachel UL

Scientific Conference (2019, June 06)

Detailed reference viewed: 125 (9 UL)
See detailA Socially Balanced European Economic Governance?
Muñoz, Susana UL

Scientific Conference (2019, June 06)

Detailed reference viewed: 43 (1 UL)
See detailMagnetic neutron scattering studies on Nd-Fe-B magnets (Keynote Lecture)
Michels, Andreas UL

Scientific Conference (2019, June 05)

Detailed reference viewed: 85 (1 UL)
Full Text
See detailInvestment fund performance validation - Vine copulae estimation using a minimum spanning tree
Petijean, Simon; Schiltz, Jang UL

Scientific Conference (2019, June 03)

Catching the dependencies between financial time series is a complex exer- cise with a lot of challenges, both of theoretical and practical nature. We develop a metho- dology to model portfolio dynamics ... [more ▼]

Catching the dependencies between financial time series is a complex exer- cise with a lot of challenges, both of theoretical and practical nature. We develop a metho- dology to model portfolio dynamics using the minimum spanning tree methods combined with econometric models which solves a good part of these challenges. We use a tracking error that is equivalent to the Euclidean distance, to cluster the closest market indices. Financial risk is difficult to manage, because risk is evolving constantly and depends on very different factors like volatility, liquidity, asset class etc. To capture this evolution we develop a recursive portfolio validation method that reveals the true nature of the evolution of the risk structure of financial portfolios. We investigate several portfolio strategies to understand the dynamics behind the holdings. We thus validate the results of our portfolio analysis. We use a vine copula construction, which allows us to separate the marginal estimation from the dependence estimation and calibrate the underlying dynamics very precisely. The minimum spanning tree method helps us to create a robust tree foundation to support the entire vine structure. Starting from a portfolio analysis, we are thus able to validate the portfolio valuation over a specific period of time. [less ▲]

Detailed reference viewed: 48 (0 UL)
Full Text
See detailŽidé, identita, domov a rodinné dědictví
Bronec, Jakub UL

Scientific Conference (2019, June 01)

Detailed reference viewed: 72 (1 UL)
Full Text
Peer Reviewed
See detailA real time hybrid controller for regulating bus operations and reducing stops at signals
Laskaris, Georgios UL; Seredynski, Marcin; Viti, Francesco UL

Scientific Conference (2019, June)

We propose a hybrid controller which consists of holding and a Driver Advisory System (DAS). It combines the objectives of seeking the regularization of operation and the reduction of stop and go actions ... [more ▼]

We propose a hybrid controller which consists of holding and a Driver Advisory System (DAS). It combines the objectives of seeking the regularization of operation and the reduction of stop and go actions at signalized intersections. A simple headway based holding criterion is applied at stops to define the time needed to maintain even spaced headways between buses and additionally a speed recommendation is given to traverse during green indication at the downstream signalized intersection. The controller is tested using simulation for a bus line of the city of Luxembourg, Luxembourg and compared to a benchmark scenario, the single application of bus holding, two advisory systems and different levels of transit signal priority. Results show that there are additional benefits compared to traditional holding in terms of regularity while similar performance to strong transit signal priority is achieved in terms of time spent at traffic lights. [less ▲]

Detailed reference viewed: 87 (10 UL)
Full Text
Peer Reviewed
See detailSupply characteristics and membership choice in round-trip and free-floating carsharing systems
Cisterna, Carolina UL; Giorgione, Giulio UL; Cipriani, Ernesto et al

Scientific Conference (2019, June)

Detailed reference viewed: 128 (30 UL)
Peer Reviewed
See detailRe-thinking untraceability in the CryptoNote-style blockchain
Yu, Jiangshan; Au, Man Ho Allen; Verissimo, Paulo UL

Scientific Conference (2019, June)

We develop new foundations on transaction untrace- ability for CryptoNote-style blockchain systems. In particular, we observe new attacks; develop theoretical foundations to model transaction ... [more ▼]

We develop new foundations on transaction untrace- ability for CryptoNote-style blockchain systems. In particular, we observe new attacks; develop theoretical foundations to model transaction untraceability; provide the least upper bound of transaction untraceability guarantee; provide ways to efficiently and automatically verify whether a given ledger achieves optimal transaction untraceability; and provide a general solution that achieves provably optimal transaction untraceability. Unlike previous cascade effect attacks (ESORICS’ 17 and PETS’ 18) on CryptoNote-style transaction untraceability, we consider not only a passive attacker but also an active adaptive attacker. Our observed attacks allow both types of attacker to trace blockchain transactions that cannot be traced by using the existing attacks. We develop a series of new games, which we call “The Sun-Tzu Survival Problem”, to model CryptoNote-style blockchain transaction untraceability and our identified attacks. In addition, we obtain seven novel results, where three of them are negative and the rest are positive. In particular, thanks to our abstract game, we are able to build bipartite graphs to model transaction untraceability, and provide reductions to formally relate the hardness of calculating untraceability to the hardness of calculating the number of perfect matchings in all possible bipar- tite graphs. We prove that calculating transaction untraceability is a #P−complete problem, which is believed to be even more difficult to solve than NP problems. In addition, we provide the first result on the least upper bound of transaction untraceability. Moreover, through our theoretical results, we are able to provide ways to efficiently and automatically verify whether a given ledger achieves optimal transaction untraceability. Furthermore, we propose a simple strategy for CryptoNote-style blockchain systems to achieve optimal untraceability. We take Monero as a concrete example to demonstrate how to apply this strategy to optimise the untraceability guarantee provided by Monero. [less ▲]

Detailed reference viewed: 167 (13 UL)
Full Text
See detailGrenze als multiple (Sozio-)Materialität
Wille, Christian UL

Scientific Conference (2019, June)

Detailed reference viewed: 127 (3 UL)
Peer Reviewed
See detailIs Life Satisfaction Contagious?
Catunda, Carolina UL; Heinz, Andreas UL; van Duin, Claire UL et al

Scientific Conference (2019, June)

Background: Life satisfaction (LS) is a major component of adolescents’ subjective well-being, facilitating adaptive development and influencing health. Literature shows that social support influences ... [more ▼]

Background: Life satisfaction (LS) is a major component of adolescents’ subjective well-being, facilitating adaptive development and influencing health. Literature shows that social support influences adolescents LS. In addition, the social network can affect health-related behaviors of adults - individuals that smoke or exercise tend to group together. However, the effects of others` LS on adolescents’ individual evaluation of LS (the contagion hypothesis) is still to be addressed. Objective(s): To test the contagion hypothesis of adolescents’ life satisfaction (how LS of proxies influences the individual LS appraisal). Method: Data is from 9738 students (aged 9-20) from the 2018 HBSC Luxembourg survey. A multilevel analysis was used to evaluate LS, with the school classes as subjects (model 1) to estimate the influence of being in a certain school class. Later, FAS, age and gender were entered as control variables (model 2). Results: The grand mean (intercept) for LS in model 1 was 7.57 (SE=.03, p<.001). For model 2, FAS (b=.47, SE=.03, p<.001), age (b=-.14, SE=.01, p<.001) and gender (b=-.23, SE=.04, p<.001) were significantly predictive of LS. The grand mean for LS, conditioned on the presence of FAS, age and gender, was 9.02 (SE=.05, p<.001). Interclass Correlation Coefficient decreased from model 1 (ICC=.08) to model 2 (ICC=.04). Conclusions: Results suggest that part of the variance of LS can be explained by the school class level. In other words, school class clusters have an influence on their LS, indicating that the LS of adolescents from a class partially accounts for individual LS. [less ▲]

Detailed reference viewed: 100 (8 UL)
See detailEine Krise der Öffentlichkeit : Protest, Populismus, "Neue Medien"
Kohns, Oliver UL

Scientific Conference (2019, June)

Detailed reference viewed: 118 (3 UL)
Peer Reviewed
See detailResilience and innovative work behaviours of entrepreneurs: The moderating role of gender
Geraudel, Mickaël UL; Cesinger, Beate; Gundolf, Katherine et al

Scientific Conference (2019, June)

Detailed reference viewed: 95 (0 UL)
Peer Reviewed
See detailCraving for violence: The role of Dark Personality traits in violent video game preference
Melzer, André UL

Scientific Conference (2019, June)

Background: Violent and antisocial video games are popular, but little is known why players are drawn to these kinds of games. This present research tested whether there is a connection between player ... [more ▼]

Background: Violent and antisocial video games are popular, but little is known why players are drawn to these kinds of games. This present research tested whether there is a connection between player preferences for violent games and characteristics of so called “dark” personality traits. Method: Relying on a user-centered approach, three online studies (N=662) examined the role of “dark” personality traits together with a novel violent game preference short scale. Results: Study 1 and 2 indicated strong correlations between trait aggression and players’ interest in explicit depictions of blood and gore and games that provide experiences of domination and antisocial behavior. In Study 3, the new scale was tested together with participants’ trait aggression, trait empathy, and the Dark Triad traits of psychopathy, Machiavellianism, and narcissism. Games featuring violence and the possibility of antisocial behavior were found to meet the needs of players who lack empathy and show callous, impulsive, and exploitive (but not narcissistic) attributes. Conclusions: Findings of individual motivators for game violence significantly extend the literature that is predominantly focusing on the effects of playing these games. Apparently, game preferences and playing habits fulfill individual needs that are at least partly determined by particular, i.e. “dark”, personality characteristics. [less ▲]

Detailed reference viewed: 597 (3 UL)
Full Text
Peer Reviewed
See detailMixed hybrid and electric bus dynamic fleet management in urban networks: a model predictive control approach
Rinaldi, Marco UL; Picarelli, Erika UL; D'Ariano, Andrea et al

Scientific Conference (2019, June)

Abstract—Reducing pollutant emissions and promoting sustainable mobility solutions, including Public Transport, are increasingly becoming key objectives for policymakers worldwide. In order to jointly ... [more ▼]

Abstract—Reducing pollutant emissions and promoting sustainable mobility solutions, including Public Transport, are increasingly becoming key objectives for policymakers worldwide. In order to jointly achieve these goals, careful consideration should be put on the operational cost and management of PT services, in order to promote the adoption of green mobility solutions and advanced management techniques by operators. In this work we develop a dynamic fleet management approach for next generation Public Transportation systems, considering the instance of mixed electric / hybrid fleet. Our objective is that of investigating to what extent electrification, coupled with optimal fleet management, can yield operational cost savings for PT operators, explicitly considering real-time disturbances, including delays, service disruptions etc. We propose a Mixed Integer Linear Program to address the problem of optimal scheduling of a mixed fleet of electric and hybrid / non-electric buses, and employ it as predictor in a Model Predictive Control approach. Test results based upon a real-life scenario showcase how the proposed approach is indeed capable of yielding a sizable reduction in operational costs, even when considerable disturbances arise from the underlying system. [less ▲]

Detailed reference viewed: 103 (8 UL)
See detailPeer interactions in everyday school life versus leisure time of adolescents and their emotional experience
Knickenberg, Margarita; Zurbriggen, Carmen UL; Hinni, Chantal

Scientific Conference (2019, June)

Detailed reference viewed: 30 (0 UL)
Full Text
Peer Reviewed
See detailLeveraging GIS Data and Topological Information to Infer Trip Chaining Behaviour at Macroscopic Level
Carrese, Filippo; Fusco, Gaetano; Cantelmo, Guido et al

Scientific Conference (2019, June)

One of the open challenges in transport modelling is to estimate within-day demand flows that reflect the complexity of individual activity-travel behaviour. While disaggregate (Activity-Based) demand ... [more ▼]

One of the open challenges in transport modelling is to estimate within-day demand flows that reflect the complexity of individual activity-travel behaviour. While disaggregate (Activity-Based) demand models can recreate realistic daily mobility patterns at an individual level, they usually require an accurate knowledge of individual user behaviour (i.e. via travel surveys), which is not always available. As a result, practitioners often turn to aggregate demand models, that have the advantage of being less demanding in terms of data but typically under represent the demand for secondary activities. In this work, we take research on within-day demand modelling one step forward by proposing a framework that combines traditional methodologies with heterogeneous data sources in order to explicitly represent trip chaining at an aggregated level. We show that the combination of web-based crowd sensed data, network data and behavioural constraints allows to capture complex spatial and temporal correlations between demand patterns. The methodology is applied on the classical Gravity model to show how to incorporate within-day dynamics. Yet, any alternative demand model can be adopted. In our case, Generation and Attraction are used to estimate the systematic demand, that is enriched of information about individual activity patterns, and then a novel definition of impedance function based on Hagestraand ellipse theory plays a central role in spatially distributing locations of trips using geographic relationships and constraints deriving from space-time behaviour. A case study for Luxembourg City has been presented to show the potential of the methodology: the choice of using data from a different spatial context to account for the temporal dimension has been validated through comparisons with official statistics. The results of simulating a workplace relocation show the advantages of this new approach in representing demand related to secondary activities. [less ▲]

Detailed reference viewed: 117 (8 UL)
Peer Reviewed
See detailReading in a new technology environment: Are reading assessments still in the ballpark?
Reichert, Monique UL; Krämer, Charlotte UL; Wollschläger, Rachel UL

Scientific Conference (2019, May 31)

Using digital technologies for daily activities such as communicating or learning has become ubiquitous today. This trend is also clearly visible within the field of reading habits, especially among ... [more ▼]

Using digital technologies for daily activities such as communicating or learning has become ubiquitous today. This trend is also clearly visible within the field of reading habits, especially among adolescents: Recent studies underline that traditional text types (e.g., fiction books) are no longer part of the more commonly read text materials (Duncan et al., 2016). The question addressed in the presentation will deal with the degree to which different reading habits impact on adolescents’ reading competence, and is intended to encourage a discussion about the construct of reading competence as generally operationalized in reading competence assessments. We base our considerations on the analyses of two data sets: The first one deals with the extra-curricular reading habits of 3074 9th grade students, and the impact of these practices on their German reading competence. The corresponding data are taken from a survey regarding their reading habits in terms of ten different types of texts (e.g., non-fiction books, e-mails). A regression analysis reveals the strongest impact on reading competence for narrative texts, whilst reading digital texts – although highly attractive among the students – is found to be of minor importance. The second data set differentiates between the reading habits of around 4500 adolescents regarding 1) traditional (printed) texts, 2) digitalised texts (e.g., e-books), and 3) text types that have emerged with new technologies (e.g., social media texts). The ensuing discussion compares particularities of classical and digital texts, and raises questions concerning the construct of reading competence (to be) targeted by standardized tests. [less ▲]

Detailed reference viewed: 180 (7 UL)
Full Text
Peer Reviewed
See detailMotivationsregulation im Sportunterricht und ihre Relevanz für die körperliche Aktivität in der Freizeit
Hutmacher, Djenna UL; Eckelt, Melanie UL; Bund, Andreas UL et al

Scientific Conference (2019, May 30)

Hintergrund: Angesichts der kontinuierlichen Abnahme der körperlichen Aktivität von Kindern und Jugendlichen erweist sich die Stärkung der Motivation im Sportunterricht als ein bedeutsamer Ansatz zur ... [more ▼]

Hintergrund: Angesichts der kontinuierlichen Abnahme der körperlichen Aktivität von Kindern und Jugendlichen erweist sich die Stärkung der Motivation im Sportunterricht als ein bedeutsamer Ansatz zur Sportaktivierung (Standage, Duda, & Ntoumanis, 2005). Die Selbstbestimmungstheorie (Deci & Ryan, 2000) postuliert, dass ein eher intrinsischer Regulationstyp sowie ein autonomie-förderndes Klima im Sportunterricht die Intention körperlicher Aktivität steigern. Basierend auf dem trans-kontextuellen Modell (Hagger, Chatzisarantis, Culverhouse, & Biddle, 2003) wird in der vorliegenden Studie geprüft, ob der motivationale Regulationstyp aus dem Sportunterricht selbigen hinsichtlich der körperlichen Aktivität im Freizeitbereich vorhersagen kann. Methode: 264 Schüler von 11 bis 21 Jahren (52.6% Mädchen) aus Luxemburg nahmen an der Studie teil. Neben der Bedürfnisunterstützung (Autonomie, Geselligkeit und Kompetenz; Standage, Duda, & Ntoumis, 2005), dem Regulationstyp im Sportunterricht (BPNES; Vlachopoulos, Ntoumanis, & Smith, 2010) sowie zur körperlichen Aktivität in der Freizeit (BREQ-II; Markland & Tobin, 2004) wurde auch die Intention zu körperlicher Aktivität erfasst (Hagger, et al. 2003). Ergebnisse: Eine SEM-Analyse belegt einen signifikanten Zusammenhang zwischen dem intrinsischen Regulationstyp im Sportunterricht und der intrinsischen Regulation zur körperlichen Aktivität in der Freizeit. Letztere erweist sich hierbei als positiver Prädiktor der Intentionsbildung. Zudem geht die Unterstützung der drei Grundbedürfnisse durch den Sportlehrer mit einer signifikant höheren intrinsischen Regulation sowie niedrigeren Amotivation im Sportunterricht einher. Schlussfolgerung: Die Befunde zeigen auf, dass ein intrinsischer Regulationstyp im Sportunterricht kontextübergreifend mit dem Regulationstyp im Freizeitbereich zusammenhängt, welcher wiederum die Aktivitätsintention erhöht. Die Implikationen dieser Befunde für den Sportunterricht werden im Rahmen des Vortrags diskutiert. [less ▲]

Detailed reference viewed: 477 (9 UL)
Full Text
Peer Reviewed
See detailWHY IS THE MARKET SKEWNESS-RETURN RELATIONSHIP NEGATIVE?
Lehnert, Thorsten UL

Scientific Conference (2019, May 30)

Detailed reference viewed: 56 (10 UL)
Full Text
Peer Reviewed
See detailIs the effect of workplace bullying exposure on subjective well-being mediated through the frustration of the need for relatedness? A longitudinal six-wave study.
Sischka, Philipp UL; Steffgen, Georges UL

Scientific Conference (2019, May 30)

Workplace bullying is a serious phenomenon that has serious detrimental effects on victim’s health, attitudes, and work-related behavior. Drawing on self-determination theory, we propose that bullying ... [more ▼]

Workplace bullying is a serious phenomenon that has serious detrimental effects on victim’s health, attitudes, and work-related behavior. Drawing on self-determination theory, we propose that bullying exposure thwarts employee’s need for relatedness with the result of decreased well-being. Studies examining these mechanisms used either a cross-sectional design (Trépanier et al., 2013) or a longitudinal design with (not theoretically justified) long time intervals (i.e., 12-month time lag; Trépanier et al., 2015). Therefore, the aim of our study was to test this mediation in a longitudinal design with much shorter time intervals (i.e. monthly), whether to see if the bullying exposure also shows short-term effects on well-being. A six-wave online survey design with monthly time lag was employed and data were collected among U.S. employees. The sample consists of 1,595 respondents (55.8% females, n=890, ageM = 36.9, ageSD =10.3). Workplace bullying exposure was assessed with the S-NAQ (Notelaers et al., 2018), frustration of the need for relatedness with the Psychological Needs Thwarting Scale (Bartholomew et al., 2011) and well-being with the WHO-5 well-being-index (Topp et al., 2015). Cross-lagged mediation analysis within a structural equation modeling framework confirmed the mediation model: Bullying exposure was significantly related to a change in frustration of relatedness and frustration of relatedness was significantly related to a change in well-being across all waves. The study findings advance the field through showing that bullying exposure has not only a long-term effect on well-being but also a short one, and that this effect is mediated through the frustration of relatedness. [less ▲]

Detailed reference viewed: 69 (0 UL)
Full Text
Peer Reviewed
See detailSocial and behavioral factors in cognitive aging: Applying the causal inference framework in observational studies
Leist, Anja UL

Scientific Conference (2019, May 25)

Rationale: There is an urgent need to better understand how to maintain cognitive functioning at older ages with lifestyle interventions, given that there is currently no medical cure available to prevent ... [more ▼]

Rationale: There is an urgent need to better understand how to maintain cognitive functioning at older ages with lifestyle interventions, given that there is currently no medical cure available to prevent, halt or reverse the progression of cognitive decline and dementia. However, in current models, it is still not well established which social and behavioral modifiable factors (e.g. education, BMI, physical activity, sleep, depression) matter most at which ages, and which behavioral profiles are most protective against cognitive decline. In the last years, advances in the fields of causal inference have equipped epidemiology and social sciences with methods and models to approach causal questions in observational studies. Method: The presentation will give an overview of the causal inference framework to investigate the value of behavior changes in cognitive aging. Motivated by conflicting recent publications if physical activity should or should not be recommended to reduce individual risk of cognitive decline, we emulate a target trial where sedentary people are followed over the course of the Survey of Health, Ageing and Retirement in Europe (SHARE) and compare their cognitive development depending on initiating or not physical activity at a later measurement. Extended inclusion/exclusion criteria, and concepts of incident versus prevalent users and multiple eligibility are introduced. Discussion: The causal inference framework applied to observational studies is able to guide study design to reconcile conflicting evidence from intervention and observational studies. Investigations under the new framework have fewer ethical considerations compared to intervention research and, considering the need to follow up individuals over several decades, are considerably more cost-effective. Limitations are discussed. [less ▲]

Detailed reference viewed: 239 (37 UL)
See detailGrenzüberschreitende Berufsausbildung als grenzüberschreitender Lernprozess in der Grenzregion Lothringen - Saarland
Funk, Ines; Nienaber, Birte UL; Dörrenbächer, Peter

Scientific Conference (2019, May 24)

Detailed reference viewed: 84 (5 UL)
Full Text
Peer Reviewed
See detailLuxembourg and the Small States Diplomacy
Danescu, Elena UL

Scientific Conference (2019, May 24)

Pierre Werner was one of the rare politicians to be associated with all the major milestones in the building of a united Europe, from the 1950 Schuman Plan to the Fontainebleau European Council in 1984 ... [more ▼]

Pierre Werner was one of the rare politicians to be associated with all the major milestones in the building of a united Europe, from the 1950 Schuman Plan to the Fontainebleau European Council in 1984. He placed the European integration process at the centre of Luxembourg domestic policy, convinced of the need to preserve national identity and sovereignty by adopting an international outlook. Determined to set the country on a forward-looking path, he pursued a pragmatic yet ambitious approach to economic diversification, focusing in particular on consolidating the international financial centre from the 1960s onwards, nurturing the idea for a national shipping flag, developing the audiovisual sector and launching the innovative satellite project [less ▲]

Detailed reference viewed: 43 (2 UL)
Full Text
Peer Reviewed
See detailAgeing and Care in Cultural Perspective
Albert, Isabelle UL

Scientific Conference (2019, May 24)

Population ageing and migration are key issues in many societies today. Despite globalisation and cultural contact, cultures still differ in their ideas and expectations with respect to ageing and late ... [more ▼]

Population ageing and migration are key issues in many societies today. Despite globalisation and cultural contact, cultures still differ in their ideas and expectations with respect to ageing and late life. This becomes particularly evident regarding old age provision. Whereas old age care preferences in western, individualistically oriented cultures rather highlight autonomy and staying independent as long as possible, collectivistic cultures traditionally rely on family care and co-residence. Cultural preferences are also expressed in different policies and extent of state provision for old-age. The question of how care decisions are taken becomes particularly prominent in light of societal transitions or migration when old care patterns might no longer hold. The present symposium focusses on cultural aspects of ageing and care from different parts of the world, drawing on both qualitative and quantitative methodologies. Starting with a general view on how people prepare for later life, the symposium deepens the focus on transitions to old age care in different cultural contexts and in light of migration. The first presentation draws on a large cross-cultural comparison between Germany, Hong Kong, and the US, and examines how personal timing of late-life preparation is associated with subjective residual life expectation. In the next contribution, we have then a closer look into cultural influences on older people’s transition into a nursing home, taking into account also family and context factors. This is followed by an in-depth look into decisional processes related to care home entry in a non-western cultural context. Afterwards, we address the context of migration, thereby comparing more independently oriented vs. family oriented cultural contexts and how the transition between the two might have an impact on preferences for different care arrangements. Finally, we focus on the emerging topic of specific needs of migrants in nursing homes, increasingly important in light of growing numbers of ageing first generation migrants. [less ▲]

Detailed reference viewed: 85 (1 UL)
Peer Reviewed
See detailCare preferences in the context of migration: nursing home, mobile assistance or family?
Albert, Isabelle UL; Barros, Stephanie; Coimbra, Susana

Scientific Conference (2019, May 24)

Theoretical background: Cultures differ in how they arrange old age care and intergenerational co-residence patterns. Whereas Southern European countries rely more on family support, in Western/Northern ... [more ▼]

Theoretical background: Cultures differ in how they arrange old age care and intergenerational co-residence patterns. Whereas Southern European countries rely more on family support, in Western/Northern European countries state provision is higher with a clear preference for paid care work. When families migrate from a more collectivist, family-oriented to a more individualist cultural context, the question arises in how far traditional care patterns from the country of origin are retained or adapted to the host cultural context. Objectives: The aims of our study were to examine 1) if different care preferences can be found between three subsamples - from independently-oriented vs. more family oriented contexts as well as migrants from one to the other, and 2) in how far differences can be explained by relationship indicators, value orientations and sociodemographic variables. Methods: Drawing on data from the FNR-funded IRMA study, we compared three subgroups of N = 359 adults between the ages of 46 and 80 - Luxembourgers and Portuguese as well as Portuguese immigrants living in Luxembourg. Results/Discussion: Controlling for socio-demographic variables, our results showed differences in care preferences as well as in how these could be explained by further variables. Most Luxembourgers preferred to be cared for at home with a mobile service; this preference was followed by institutional care and only few preferred to live with their adult children. In contrast, institutional care was rarely chosen as a preference by Portuguese living in Luxembourg and in Portugal where care provision from children was preferred more often. Whereas relationship quality, expectations of adult children and current support exchange were high for participants who preferred care by adult children in all three subsamples, differences were found with regard to family orientation which was more important for care preferences of participants living in Luxembourg than Portugal. Results are discussed in a theoretical framework of intergenerational relations in light of migration and ageing. [less ▲]

Detailed reference viewed: 90 (0 UL)
Peer Reviewed
See detailTransition into a Nursing Home: Theoretical Framework on the Influence of Cultural Factors
Boll, Thomas UL

Scientific Conference (2019, May 23)

OBJECTIVES: To create a theoretical framework for analyzing cultural influences on older people’s transition into a nursing home (NH). THEORIES: Action theories in cultural and developmental psychology ... [more ▼]

OBJECTIVES: To create a theoretical framework for analyzing cultural influences on older people’s transition into a nursing home (NH). THEORIES: Action theories in cultural and developmental psychology (Boesch, 2001; Brandtstädter, 2006), social representations theory (Marková, 2012), theory of culture as a semiotic regulation system (Valsiner, 2007). METHODS: (1) Conceptualization of NH care and family care as alternative action paths for meeting the needs of older persons and their relatives. (2) Conceptualization of culture as a product of human actions and as offering different possibilities of care-related actions. (3) Systematization of care-related goals and instrumental values of NH care versus family care. (4) Theoretical mapping of cultural factors on proximal determinants of elder care decisions and actions. RESULTS: The framework contains the following propositions. Older people and family caregivers hold multiple goals (e.g., welfare of family carers, welfare of old person). NH care can meet some goals and simultaneously frustrate others. The effects and choice of NH care depends on a variety of cultural factors: Legal regulations for warranting care quality (e.g., nursing home laws), economic concepts and practices (e.g., business models of elder care) and professionalization (e.g., staff training). Family care depends on institutionalized options for reconciling job-, care- and other family-related duties (e.g., mobile care services, day care units) and for compensating expenses (e.g., care insurance). Cultural concepts of care dependency influence the meanings that individuals attribute to NH care. CONCLUSIONS: The framework specifies cultural factors relevant for older peoples’ transition into a NH and delineates mediating paths. It invites other sciences specialized on relevant cultural factors (e.g., law, political science, social economics) to further refine the analysis. An identification of cultural factors affecting NH care opens new options for improving care quality or living conditions of older persons, family and professional carers. [less ▲]

Detailed reference viewed: 83 (3 UL)
Full Text
Peer Reviewed
See detailCompetence support in physical education: a predictor towards a more self-determined physical activity behavior?
Hutmacher, Djenna UL; Eckelt, Melanie UL; Bund, Andreas UL et al

Scientific Conference (2019, May 22)

Objectives: Given a widespread continuous decrease in children’s and adolescents’ physical activity (PA), the potential of physical education (PE) in promoting young people’s PA motivation and behavior ... [more ▼]

Objectives: Given a widespread continuous decrease in children’s and adolescents’ physical activity (PA), the potential of physical education (PE) in promoting young people’s PA motivation and behavior has become a key issue. Research in line with the trans-contextual model highlights the support of perceived autonomy in PE as a significant predictor for self-determined PA behavior in a leisure-time (LT) context (Hagger et al., 2003). However, the impact of competence and relatedness support still remains unclear. Therefore, the present study aimed to investigate the role of support during PE, differentiated into three basic needs for behavioral regulation in PE and LT. It was expected that, in addition to perceived autonomy, competence and relatedness would be relevant predictors. Method: 244 students (139 girls) from Luxembourg, ranging from 11 to 21 years, participated in the study. Via a digital questionnaire, the scales need support (perceived autonomy, competence and relatedness; Standage, Duda, & Ntoumanis, 2005), basic needs (BPNES; Vlachopoulos, Ntoumanis, & Smith, 2010), and external and intrinsic motivation in PE (PLOC-R; Vlachopoulos et al., 2011) as well as in LT (BREQ-II; Markland & Tobin, 2004) were applied in the classroom. With regard to the theory of planned behavior (Ajzen, 1985), the attitudes, perceived behavioral control, and intentions toward PA were assessed (Hagger et al., 2003). Results: A SEM analysis showed that competence support in PE was the major predictor for self-determined behavior in PE, while perceived autonomy produced mixed findings. Relatedness support had a negative effect on external regulated behavior in PE. In accordance with the assumptions of the trans-contextual model, similar behavioral regulations in PE and LT were found. Furthermore, a more self-determined behavior in LT predicted higher attitudes, subjective norms, and perceived behavioral control towards PA, which increased the intention of doing sports. Discussion: Results suggest that the children’s perceived support of competence from the teacher during PE is an important factor to increase self-determined PA behavior. Further intervention programs may focus on improving the perception of competence during PE in order to increase motivation. In addition, these findings underline the importance for future research to consider the different roles of perceived support of competence, autonomy and relatedness in PE. [less ▲]

Detailed reference viewed: 174 (5 UL)
See detailThe interplay of deliberative legitimacy, constituent power and constitutional form
Burks, Deven UL

Scientific Conference (2019, May 21)

Enhanced legitimacy is a driving force behind deliberative innovations (Fung 2015, Curato and Böker 2016). This is no less the case for constitutional deliberative innovations. Assessing deliberative ... [more ▼]

Enhanced legitimacy is a driving force behind deliberative innovations (Fung 2015, Curato and Böker 2016). This is no less the case for constitutional deliberative innovations. Assessing deliberative constitutionalism’s success in generating legitimacy necessitates a better grasp of the distinct legitimacy standards which constitutional deliberative innovations may meet. Bound up with those standards is deliberative constitutionalism’s attempt to navigate the tension between politics and law, constituent power (CP) and constituted form (CF). How do factors of deliberative legitimacy interact with standard ways of modelling that tension? To answer this question, I proceed in three parts, the first of which maps ten factors of deliberative legitimacy at four levels: personal, interpersonal, institutional, and systemic. The second lays out four ways of modelling the tension between CP and CF from Loughlin and Walker (2007): the containment, mutual articulation, radical potential, and irritant models. The last part sets out to determine whether the four models directly or indirectly support or neglect the realization of the forms of deliberative legitimacy and casts in a different light from Parkinson (2016) the landscape of deliberative democracy and constitutions. I conclude that certain forms of deliberative legitimacy may be more sensitive to and better served by some models of CP and CF than by others. [less ▲]

Detailed reference viewed: 90 (0 UL)
Peer Reviewed
See detailPreschool teachers’ language-supporting strategies in multilingual education in Luxembourg
Kirsch, Claudine UL

Scientific Conference (2019, May 16)

Detailed reference viewed: 94 (1 UL)
See detailThe social stratification of higher education trajectories: A sequence-analytical approach
Haas, Christina UL

Scientific Conference (2019, May 16)

Detailed reference viewed: 35 (1 UL)
Peer Reviewed
See detailThe Effect of Professional Development on Multilingual Education in Early Childhood in Luxembourg.
Kirsch, Claudine UL; Aleksic, Gabrijela; Andersen, Katja Natalie UL et al

Scientific Conference (2019, May 15)

In sum, these findings show that the PD made the practitioners reflect on their language use, which, in turn, contributed to a positive stance towards multilingualism (Egert et al., 2018; Garrity et al ... [more ▼]

In sum, these findings show that the PD made the practitioners reflect on their language use, which, in turn, contributed to a positive stance towards multilingualism (Egert et al., 2018; Garrity et al., 2015; Peeters, Cameron, Lazzari, et al., 2014). The partly contradictory findings – embracing translanguaging while holding on to language separation - are reminiscent of other studies showing that practitioners do not simply substitute one set of beliefs with a different one but can hold contradictory beliefs (Levin and Wadmany, 2006). Reflecting on the professional development carried out in New York, Seltzer (2018) reported that the participating teachers simultaneously evidenced ideological shifts and deficit thinking, such as defining children’s linguistic skills as baby talk. [less ▲]

Detailed reference viewed: 151 (8 UL)
Full Text
Peer Reviewed
See detailMultiscale fracture: a natural connection between reduced order models and homogenisation
Bordas, Stéphane UL; Beex, Lars UL; Chen, Li UL et al

Scientific Conference (2019, May 13)

Detailed reference viewed: 160 (13 UL)
Full Text
See detailL’hybridité de la voix actoriale : « le parlé-chanté » : Marina Hands et Éric Ruf dans Phèdre de Jean Racine et Partage de midi de Paul Claudel
Deregnoncourt, Marine UL

Scientific Conference (2019, May 10)

In the production of Patrice Chéreau (Phèdre to Jean Racine, Théâtre de l’Odéon, Paris – 2003) and Yves Beaunesne (Noon Sharing to Paul Claudel, Comédie-Française, Paris – 2007), the voice to Marina Hands ... [more ▼]

In the production of Patrice Chéreau (Phèdre to Jean Racine, Théâtre de l’Odéon, Paris – 2003) and Yves Beaunesne (Noon Sharing to Paul Claudel, Comédie-Française, Paris – 2007), the voice to Marina Hands (Aricie, first and Ysé, second) and Éric Ruf (Hippolyte, first and Mesa, second) is questionable. Do these actors speak or sing? How does the “spoken-sing” appear? To do so, our reflection is divided into three parts. The first two parts are devoted to those creations of Patrice Chéreau and Yves Beaunesne. Have they spoken operas? The last part focuses on Marina Hands and Éric Ruf’s interpretations to demonstrate that these actors are “sacred monsters” who sing language in verses. [less ▲]

Detailed reference viewed: 41 (1 UL)
See detailMultilingualism: the cognitive perspective
Wealer, Cyril UL

Scientific Conference (2019, May 03)

Detailed reference viewed: 30 (2 UL)
Full Text
Peer Reviewed
See detailDisplacement based polytopal elements a strain smoothing and scaled boundary approach
Bordas, Stéphane UL; Natarajan, Sundararajan

Scientific Conference (2019, May 03)

Detailed reference viewed: 176 (12 UL)