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See detailDwelling in (Un)Familiarity: Examples from the Luxembourg-German Borderland
Boesen, Elisabeth UL; Schnuer, Gregor

in Boesen, Elisabeth; Schnuer, Gregor (Eds.) European Borderlands. Living with Barriers and Bridges (Border Regions Series) (2017)

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See detailDwelling in border regions – discourse matters
Christmann, Nathalie UL

Scientific Conference (2015, June)

Effects of cross-border mobility resulting from uneven development in border regions can be perceived very differently by city councils or planners and the local population. This paper focuses on the ... [more ▼]

Effects of cross-border mobility resulting from uneven development in border regions can be perceived very differently by city councils or planners and the local population. This paper focuses on the consequences of the cross-border mobility in relation to housing markets in four cities in a transnational cross-border polycentric metropolitan region in Western Europe. It applies Clarke’s situational analysis and Keller’s sociology of knowledge approach to discourse, in order to represent the complexity and contradictions going along with this development. Until now, the study of cross-border mobility focused mainly on the motives of citizens that left their country of origin to dwell in the close by border regions, while the related impacts on neighbouring communities remain mostly unexplored. A quick review of recent media coverage could easily lead one to describe the situation as a sort of love-hate relationship. Analytic cartographies are employed to show that similar effects can be perceived quite differently. [less ▲]

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See detailDwelling trends in border regions - towards an inter-urban discourse analysis
Christmann, Nathalie UL

Scientific Conference (2015, June)

Effects of population mobility resulting from uneven development in border regions can be perceived very differently by city councils or planners and the local population. This paper focuses on the ... [more ▼]

Effects of population mobility resulting from uneven development in border regions can be perceived very differently by city councils or planners and the local population. This paper focuses on the perceptions of the effects of population mobility and dwelling in a transnational cross-border polycentric metropolitan region in Western Europe. The economic development of the Grand Duchy of Luxembourg calls for a constant expansion of the labour market, attracting cross-border commuters and a ‘highly mobile elite’. The concomitant rise in property prices as well as the extreme housing shortages in Luxembourg have led to an expansion of the housing market into the border regions. So far studies have mostly dealt with the socio-demographic characteristics of the transmigrants. This research aims to detect people’s perceptions of the phenomenon by applying a discourse analysis, thus helping to trigger an increasing awareness for the emerging transnational housing market. [less ▲]

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See detailDwelling trends in border regions – towards an inter-urban discourse analysis
Christmann, Nathalie UL

Scientific Conference (2016, May)

Effects of population mobility resulting from uneven development in border regions can be perceived very differently by city councils or planners and the local population. This paper focuses on the ... [more ▼]

Effects of population mobility resulting from uneven development in border regions can be perceived very differently by city councils or planners and the local population. This paper focuses on the perceptions of population mobility and dwelling in the Greater Region, a transnational cross-border polycentric region in Western Europe. The economic development of the Grand Duchy of Luxembourg calls for a constant expansion of the labour market, attracting cross-border commuters and a ‘highly mobile elite’. The concomitant rises in property prices as well as the extreme housing shortages in Luxembourg have led to an expansion of the housing market into the border regions. “Je t’aime, moi non plus” (I love you… nor do I): this is how the French newspaper L’Express (02.12.2011; N° 3152: II) summarises the transnational linkages of Luxembourg with its neighbouring countries. German media and urban planning documents refer to the ‚Luxembourg-effect’, summing up several developments such as cross-border commuting and related traffic collapses (short distance becomes relative in this concern, because travel time is increasing extremely in rush hours), the increase of housing costs but also cross-border shopping etc. On the one hand, the ‘economic engine’ Luxembourg offers workplaces for many commuters, positively affecting the development of this European cross-border polycentric region; on the other hand, negative consequences such as the overcrowded real estate market in Luxembourg continue beyond the national border and affect neighbouring housing markets. Some city development plans show that city councils perceive the proximity to Luxembourg as an opportunity for the development of the city. Simultaneously, locals that do not have their job in the Grand Duchy of Luxembourg might feel displaced and develop resentment vis-à-vis their new neighbours from Luxembourg, Belgium, Germany, and France that moved to the border region to work in the Grand Duchy of Luxembourg. These labour migrants/highly mobile elite bring higher purchasing power and are driving increasing rental and housing prices. Depending on the context, similar effects can thus be perceived/constructed very differently by city councils or planners and the local population and even within the same social world/arena. Assuming that abstract societal processes become concrete and experienced at the local level, this paper interrogates the discursive framing of the consequences of the transnational linkages in regard to housing situations in the Greater Region. To distinct the formation and the operation of linguistic constructions about places and regions, and their amalgamation with the practices of actors and institutions, guiding principles of municipal policy, urban planning documents and the local media of three medium sized towns in the borderland Arlon in Belgium, Thionville in France and Trier in Germany are being analysed. Furthermore stakeholder interviews are conducted to gain deeper insights into individual perceptions. Even though their distance to Luxembourg is quite similar (30 to 50 km), these three cities have to be considered as single cases, with distinct developments. Whereas Thionville for example is often being considered as a dormitory town, this is not the case for Trier. Nevertheless, a review of recent media coverage reveals that the situation is characterized by a sort of lovehate relationship. A social constructionist approach is adopted to trigger an increasing awareness for the emerging transnational housing market. [less ▲]

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See detailA Dyadic Deontic Logic in HOL
Benzmüller, Christoph UL; Farjami, Ali UL; Parent, Xavier UL

in Broersen, Jan; Condoravdi, Cleo; Nair, Shyam (Eds.) et al Deontic Logic and Normative Systems --- 14th International Conference, DEON 2018, Utrecht, The Netherlands, 3-6 July, 2018 (2018, June 11)

A shallow semantical embedding of a dyadic deontic logic by Carmo and Jones in classical higher-order logic is presented. This embedding is proven sound and complete, that is, faithful. The work presented ... [more ▼]

A shallow semantical embedding of a dyadic deontic logic by Carmo and Jones in classical higher-order logic is presented. This embedding is proven sound and complete, that is, faithful. The work presented here provides the theoretical foundation for the implementation and automation of dyadic deontic logic within off-the-shelf higher-order theorem provers and proof assistants. [less ▲]

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See detailDynamic Adaptation Applied to Sabotage Tolerance
Guelton, S.; Gautier, T.; Pazat, J.-L. et al

in Proc. of the IEEE 17th Euromicro International Conference on Parallel, Distributed, and Network-Based Processing (PDP 2009) (2009)

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See detailDynamic Adaptation of Software-defined Networks for IoT Systems: A Search-based Approach
Shin, Seung Yeob UL; Nejati, Shiva UL; Sabetzadeh, Mehrdad UL et al

in Proceedings of the 15th International Symposium on Software Engineering for Adaptive and Self-Managing Systems (SEAMS'20) (2020, May)

The concept of Internet of Things (IoT) has led to the development of many complex and critical systems such as smart emergency management systems. IoT-enabled applications typically depend on a ... [more ▼]

The concept of Internet of Things (IoT) has led to the development of many complex and critical systems such as smart emergency management systems. IoT-enabled applications typically depend on a communication network for transmitting large volumes of data in unpredictable and changing environments. These networks are prone to congestion when there is a burst in demand, e.g., as an emergency situation is unfolding, and therefore rely on configurable software-defined networks (SDN). In this paper, we propose a dynamic adaptive SDN configuration approach for IoT systems. The approach enables resolving congestion in real time while minimizing network utilization, data transmission delays and adaptation costs. Our approach builds on existing work in dynamic adaptive search-based software engineering (SBSE) to reconfigure an SDN while simultaneously ensuring multiple quality of service criteria. We evaluate our approach on an industrial national emergency management system, which is aimed at detecting disasters and emergencies, and facilitating recovery and rescue operations by providing first responders with a reliable communication infrastructure. Our results indicate that (1) our approach is able to efficiently and effectively adapt an SDN to dynamically resolve congestion, and (2) compared to two baseline data forwarding algorithms that are static and non-adaptive, our approach increases data transmission rate by a factor of at least 3 and decreases data loss by at least 70%. [less ▲]

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See detailDynamic analysis of usage control policies.
Elrahaiby, Yehia; Pang, Jun UL

in Proceedings of the 11th Conference on Security and Cryptography (SECRPT) (2014)

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See detailDynamic and complex optical patterns from colloids of cholesteric liquid crystal droplets
Noh, Junghyun UL; Drevensek-Olenik, Irena; Yamamoto, Jun et al

in Proceedings of the SPIE (2015), 9384

Drops or shells of a planar-aligned short-pitch cholesteric liquid crystal exhibit unique optical properties due to the combination of Bragg reflection in the cholesteric helix and a radial orientation of ... [more ▼]

Drops or shells of a planar-aligned short-pitch cholesteric liquid crystal exhibit unique optical properties due to the combination of Bragg reflection in the cholesteric helix and a radial orientation of the helix axis. If such a droplet is illuminated from above, light is reflected into a continuous set of cones, the opening angles of which depend on where on the droplet the light hits its surface. For the wavelength that fulfills the Bragg condition the reflection is dramatically enhanced, yielding the light cones colored. A photonic cross communication scheme arises for certain angles, reflecting light back to the observer from a different droplet than the one originally illuminated. This gives rise to an intricate pattern of colored and circularly polarized spots. A number of interesting applications may be developed based on this pattern, e.g. in identification and authentication devices. We have carried out a detailed spectrophotometric analysis of the patterns, localized to individual spot maxima. A quantitative comparison between the measured spectra and the reflection wavelength expected from a model for the pattern generation allows us to conclude that the droplets are in fact not spherical but slightly ellipsoidal. [less ▲]

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See detailDynamic and Partially Connected Ring Topologies for Evolutionary Algorithms with Structured Populations
Fernandes, Carlos; Jimenez Laredo, Juan Luis UL; Merelo, Juan Julian et al

in The European Conference on the Applications of Evolutionary Computation (2014)

This paper investigates dynamic and partially connected ring topologies for cellular Evolutionary Algorithms (cEA). We hypothesize that these structures maintain population diversity at a higher level and ... [more ▼]

This paper investigates dynamic and partially connected ring topologies for cellular Evolutionary Algorithms (cEA). We hypothesize that these structures maintain population diversity at a higher level and reduce the risk of premature convergence to local optima on deceptive, multimodal and NP-hard fitness landscapes. A general framework for modelling partially connected topologies is proposed and three different schemes are tested. The results show that the structures improve the rate of convergence to global optima when compared to cEAs with standard topologies (ring, rectangular and square) on quasi-deceptive, deceptive and NP-hard problems. Optimal population size tests demonstrate that the proposed topologies require smaller populations when compared to traditional cEAs. [less ▲]

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See detailDynamic and structural properties of orthorhombic rare-earth manganites under high pressure
Mota, D. A.; Almeida, A.; Rodrigues, V. H. et al

in Physical Review B (2014), 90(5),

We report a high-pressure study of orthorhombic rare-earth manganites AMnO3 using Raman scattering (for A = Pr, Nd, Sm, Eu, Tb, and Dy) and synchrotron x-ray diffraction (XRD), for A = Pr, Sm, Eu, and Dy ... [more ▼]

We report a high-pressure study of orthorhombic rare-earth manganites AMnO3 using Raman scattering (for A = Pr, Nd, Sm, Eu, Tb, and Dy) and synchrotron x-ray diffraction (XRD), for A = Pr, Sm, Eu, and Dy. In all cases, a phase transition was evidenced by the disappearance of the Raman signal at a critical pressure that depends on the A cation. For the compounds with A = Pr, Sm, and Dy, XRD confirms the presence of a corresponding structural transition to a noncubic phase, so that the disappearance of the Raman spectrum can be interpreted as an insulator-to-metal transition. We analyze the compression mechanisms at work in the different manganites via the pressure dependence of the lattice parameters, the shear strain in the ac plane, and the Raman bands associated with out-of-phase MnO6 rotations and in-plane O2 symmetric stretching modes. Our data show a crossover across the rare-earth series between two different kinds of behavior. For the smaller A cations considered in this study (Dy and Tb), the compression is nearly isotropic in the ac plane, with only small evolutions of the tilt angles and cooperative Jahn-Teller distortion. As the radius of the A cation increases, the pressure-induced reduction of Jahn-Teller distortion becomes more pronounced and increasingly significant as a compression mechanism, while the pressure-induced tilting of octahedra chains becomes conversely less pronounced. We finally discuss our results in light of the notion of chemical pressure and show that the analogy with hydrostatic pressure works quite well for manganites with the smaller A cations considered in this paper but can be misleading with large A cations. [less ▲]

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See detailA Dynamic Approach for Combining Abstract Argumentation Semantics – Technical Report
Dauphin, Jérémie UL; Cramer, Marcos UL; van der Torre, Leon UL

Report (2018)

Abstract argumentation semantics provide a direct relation from an argumentation framework to corresponding sets of acceptable arguments, or equivalently to labeling functions. Instead, we study step-wise ... [more ▼]

Abstract argumentation semantics provide a direct relation from an argumentation framework to corresponding sets of acceptable arguments, or equivalently to labeling functions. Instead, we study step-wise update relations on argumentation frameworks whose fixpoints represent the labeling functions on the arguments. We make use of this dynamic approach in order to study novel ways of combining abstract argumentation semantics. In particular, we introduce the notion of a merge of two argumentation semantics, which is defined in such a way that the merge of the preferred and the grounded semantics is the complete semantics. Finally we consider how to define new semantics using the merge operator, in particular how meaningfully combine features of naive-based and complete-based semantics. [less ▲]

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See detailA dynamic approach for combining abstract argumentation semantics
Dauphin, Jérémie UL; Cramer, Marcos; van der Torre, Leendert

in Dynamics, Uncertainty and Reasoning (2019)

Abstract argumentation semantics provide a direct relation from an argumentation framework to corresponding sets of acceptable arguments, or equivalently to labeling functions. Instead, we study step-wise ... [more ▼]

Abstract argumentation semantics provide a direct relation from an argumentation framework to corresponding sets of acceptable arguments, or equivalently to labeling functions. Instead, we study step-wise update relations on argumentation frameworks whose fixpoints represent the labeling functions on the arguments. We make use of this dynamic approach in order to study novel ways of combining abstract argumentation semantics. In particular, we introduce the notion of a merge of two argumentation semantics, which is defined in such a way that the merge of the preferred and the grounded semantics is the complete semantics. Finally we consider how to define new semantics using the merge operator, in particular how meaningfully combine features of naive-based and complete-based semantics. [less ▲]

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See detailA Dynamic Associative Memory for Distant Reading
Kamlovskaya, Ekaterina UL; Schommer, Christoph UL; Sirajzade, Joshgun UL

in International Conference on Artificial Intelligence Humanities, Book of Abstracts (2018, August 16)

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See detailDynamic Bargaining and Stability with Veto Players
Anesi, Vincent UL; Duggan, John

in Games and Economic Behavior (2017), 103

This note examines the structure of stationary bargaining equilibria in the finite framework of Anesi (2010). The main result establishes a tight connection between the set of equilibrium absorbing points ... [more ▼]

This note examines the structure of stationary bargaining equilibria in the finite framework of Anesi (2010). The main result establishes a tight connection between the set of equilibrium absorbing points and the von Neumann–Morgenstern solutions: assuming that players are patient, that the voting rule is oligarchical, and that there is at least one veto player with positive recognition probability, a set of alternatives corresponds to the absorbing points of an equilibrium if and only if it is a von Neumann–Morgenstern solution. We also apply our analysis of ergodic properties of equilibria to the persistent agenda setter environment of Diermeier and Fong (2012). We show that all equilibria are essentially pure, and we extend their characterization of absorbing sets to allow an arbitrary voting rule and by removing the restriction to pure strategy equilibria. [less ▲]

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See detailDynamic Career Attitudes : theoretical model and evaluation protocol
Karavdic, Senad UL; Baumann, Michèle UL

Conference given outside the academic context (2013)

Monitoring and assessment of career attitudes are critical for the student’s preparation for an adapted university-to-work transition. Our study explored the relationships between the psycho-educational ... [more ▼]

Monitoring and assessment of career attitudes are critical for the student’s preparation for an adapted university-to-work transition. Our study explored the relationships between the psycho-educational and socio-demographic factors, and the perception of their dynamic career attitudes (DCA). DCA must be stimulated at the entry to university with appropriately collaborative supports, pedagogical workshops and interpersonal trainings. [less ▲]

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See detailDynamic career attitudes among master students: Social disparities in employment capabilities.
Karavdic, Senad UL; Baumann, Michèle UL

in Pracana, Clara (Ed.) Social Psychology (2015)

The preparation of students’ future career trajectories is a dynamic process in relation with social and educational determinants, but their interactions must be further investigated. Our objective is to ... [more ▼]

The preparation of students’ future career trajectories is a dynamic process in relation with social and educational determinants, but their interactions must be further investigated. Our objective is to analyze the associations between generic employment capabilities, career attitudes and other related factors among postgraduate students. Method: All master's students recorded in the Centre for Documentation and Information on Higher Education from Luxembourg database were contacted by letter to participate in an online questionnaire. The online questionnaire (French and English) with five scales was scored: 1) Dynamic Career Attitudes (DCA- 13 items); 2) Employability Soft-Skills (ESS-14); 3) Search for Work Self-Efficacy (SWSES - 12 items); 4) Quality of Life domain Autonomy (QLA- 4 items); and 5) Socio-demographical characteristics. The data were analyzed using bivariate tests, correlations and multiple linear regression models. Results: Of the 481 volunteers (26.4 years; SD=5.5) a majority were women, Luxembourgish, unemployed, and had less than or equal to six months of job experiences. Higher the ESS, SWSES and QLA scores, higher was the DCA score. Nationality, being unemployed, having less than six months of job experiences and being in the first year of master were associated with lower Dynamic Career Attitudes score. Conclusion: Covering the whole period of the master’s degree, internship activities and proactive workshops may be developed to improve generic employment capabilities and quality of autonomy. The Dynamic Career Attitudes scale appears an appropriate instrument to evaluate the efficacy of the university career services programme. [less ▲]

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See detailDynamic Career Attitudes And Life Satisfaction Among CEDIES' Postgraduates From Luxembourg
Karavdic, Senad UL

Doctoral thesis (2017)

Introduction: With an ever increasing number of university students and the employment shift from an opportunity to insecure development, new postgraduate generations have to be amenable to continuous ... [more ▼]

Introduction: With an ever increasing number of university students and the employment shift from an opportunity to insecure development, new postgraduate generations have to be amenable to continuous upgrading, complete with a wide range of skills in the promotion of their career development. Keeping in mind that the job market and work environment are variables that are mostly changing, the possession of an active career attitude may be a guarantee for postgraduates’ employability and their career outcome. Giving importance to the adjustment during the transitional period, life satisfaction (LS) may be altered based on the discrepancy between career aspiration and career achievement. Among university postgraduates, the main objectives of our doctoral work are to (1) measure the associations between dynamic career attitudes (DCA), generic employment capabilities and socioeconomic factors (2) determine the underlying structure of DCA, protean career orientation and career goal (3) analyze relations between DCA dimensions and career factors such as career goals, protean career orientation and LS (4) evaluate the effects of DCA dimensions on LS for native and non-native Luxembourgish postgraduates. Method: A survey was conducted among 2800 participants registered at the Centre for Documentation and Information on Higher Education (CEDIES). Data collection was realized via an information flyer that was sent to the home addresses of the postgraduates and that contained instructions about the aims of the study and a link to the survey. The postgraduates could directly access the anonymous online questionnaire in either French or English. To explore the associations and relations between variables student t-tests and bivariate correlations were used. Exploratory factor analysis was conducted to identify the underlying relationships between measured DCA dimensions, protean career orientation and career goals. In order to determine the statistical significance of the indirect effect for the mediation analysis, the bootstrapped confidence interval on 1000 bootstrap samples was used. A multiple logistic regression was applied to each group, but only significant variables (p<0.05) were introduced into the regression models. Results: A total of 644 volunteers completed the self-assessment questionnaire online. Majority of the participants were female, students and not employed. Postgraduates with high employment capabilities tend to present a higher dynamic career score that has been identified as a construct of four career dimensions (career adaptability, career optimism, career related knowledge and career planning). Each dimension was mediated from self-directed career dimension of protean career orientation by intrinsic career goal. Career adaptability and career optimism predicted both, happiness and LS. However, this relationship seems only to be presented for ‘postgraduates that are still studying. In the same vein, the DCA dimension of career optimism has been associated to LS by native Luxembourgers, whereas perceived financial situation intervenes in explanation of LS by non-native postgraduates. Discussion and Conclusion: The Dynamic Career Attitudes scale appears to be a relevant instrument in evaluating disparities in employment capabilities among postgraduates. Our findings indicated the application of intrinsic career goal in the development of career attitudes, where career adaptability and career optimism explained the highest proportion of the variance related to LS. The acquisition of qualitative information on DCA from a comparable population at different stages (from career goals aspirations and the process toward career goal accomplishments), could be rendered more straightforward for future research. Finally, it could be interesting to assess the DCA of university graduates during and after their Master’s degrees; before they start work and in the early years of their careers. Contextualizing our findings, the differences of native Luxembourgish and non-native postgraduates don't differ in LS, however, it seems to be influenced by different variables such as financial situation suggesting the introduction of the social grant of CEDIES for the most disadvantaged students. Practical implications are also suggested. Promoting programs proposed by University services towards counseling and an accompaniment to their career attitudes may enhance postgraduates’ LS which are major indicators for a successful mobility. [less ▲]

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See detailDynamic change of host gastrointestinal microbiome and immune status in relation to mucosal barrier effects during chemotherapy and immune ablative intervention in humans
Kaysen, Anne UL; Heintz, Anna UL; Lebrun, Laura UL et al

Poster (2014, April)

The human gastrointestinal tract is colonized by communities of endogenous microbes, commonly referred to as the microbiome. Here, the microbiota are in close contact with the host intestinal mucosa and ... [more ▼]

The human gastrointestinal tract is colonized by communities of endogenous microbes, commonly referred to as the microbiome. Here, the microbiota are in close contact with the host intestinal mucosa and its innate and adaptive immune systems. The fact that certain stimuli induce an inflammatory response whereas others induce tolerance suggests, that the host immune system interacts with the microbiota and vice versa in different ways. However, the exact details of theses interactions remain largely unknown. It is known that cancer treatment can result in severe adverse effects like mucositis and in combination with allogeneic stem cell transplantation (Tx), in graft-versus host disease (GvHD). However, there is at present only sparse information available on the effects of chemotherapy on the intestinal microbiota and resulting changes in microbiome-immune system interactions. Almost no data exists on the effect of allogeneic stem cell Tx on the composition of the gastrointestinal microbiota. In this project, we are studying the complex interactions between the host and the intestinal microbiota after chemotherapy with or without allogeneic Tx and the occurrence of severe adverse side effects such as mucositis and GvHD. Using a systems biology approach including metagenomics and RNAseq, fecal samples and blood plasma samples from patients undergoing these treatments for malignancies will be analysed to identify the composition of the gastrointestinal microbiome and bacterial small RNAs. The main research hypothesis is that there are quantitative and qualitative changes in the gastrointestinal microbiome following chemotherapy and allogeneic Tx which are linked to the immune status of the patients and possible treatment side-effects, in particular mucositis and GvHD. We aim to provide knowledge on how the host's intestinal mucosa and immune system influence the gastrointestinal microbiome and on the role and involvement of the gastrointestinal microbiota in development in mucositis and GvHD. Importantly, this could help in the formulation of measures to prevent mucositis and GvHD development. [less ▲]

Detailed reference viewed: 267 (36 UL)