Last 7 days
Bookmark and Share    
Full Text
Peer Reviewed
See detailCity delineation in European applications of LUTI models: review and tests
Thomas, Isabelle; Jones, Jonathan; Caruso, Geoffrey UL et al

in Transport Reviews (2017)

This paper stresses the lack of attention paid to the geographical definitions of cities in LUTI models as one key detrimental aspect to transferring and generalising LUTI results. First, the ... [more ▼]

This paper stresses the lack of attention paid to the geographical definitions of cities in LUTI models as one key detrimental aspect to transferring and generalising LUTI results. First, the argumentation develops from a meta-analysis of peer-reviewed publications about LUTI applications in European cities. We show that most authors do not assess findings against potential geographical biases. Second, theoretical simulations are conducted with UrbanSim applied to a synthetic urban area. By varying the geographical limits of the system and population endowments, our simulations confirm that the absence of control on city delineation weakens the results. Finally, the paper suggests methodological guidelines to improve the comparability of LUTI applications and push forward their theoretical agenda. [less ▲]

Detailed reference viewed: 10 (0 UL)
Full Text
Peer Reviewed
See detailCorrelates of social exclusion in social anxiety Disorder: An fMRI study
Heeren, Alexandre; Dricot, Laurence; Billieux, Joël UL et al

in Scientific Reports (2017), 7

Cognitive models posit that social anxiety disorder (SAD) is maintained by biased informationprocessing vis-à-vis threat of social exclusion. However, uncertainty still abounds regarding the very nature ... [more ▼]

Cognitive models posit that social anxiety disorder (SAD) is maintained by biased informationprocessing vis-à-vis threat of social exclusion. However, uncertainty still abounds regarding the very nature of this sensitivity to social exclusion in SAD. Especially, brain alterations related to social exclusion have not been explored in SAD. Our primary purpose was thus to determine both the selfreport and neural correlates of social exclusion in this population. 23 patients with SAD and 23 matched nonanxious controls played a virtual game (“Cyberball”) during fMRI recording. Participants were frst included by other players, then excluded, and fnally re-included. At the behavioral level, patients with SAD exhibited signifcantly higher levels of social exclusion feelings than nonanxious controls. At the brain level, patients with SAD exhibited signifcantly higher activation within the left inferior frontal gyrus relative to nonanxious controls during the re-inclusion phase. Moreover, self-report of social exclusion correlates with the activity of this cluster among individuals qualifying for SAD diagnosis. Our pattern of fndings lends strong support to the notion that SAD may be better portrayed by a poor ability to recover following social exclusion than during social exclusion per se. These fndings value social neuroscience as an innovative procedure to gain new insight into the underlying mechanisms of SAD. [less ▲]

Detailed reference viewed: 36 (1 UL)
Full Text
Peer Reviewed
See detailWhen An Educational Ideology Travels: The Experience Of The New Math Reform In Luxembourg
Nadimi Amiri, Shaghayegh UL

in Mathematics Education and Life at Times of Crisis (2017)

Detailed reference viewed: 10 (4 UL)
Full Text
Peer Reviewed
See detailAnimal-assisted intervention in dementia: Effects on neuropsychiatric symptoms and on caregivers' distress perceptions
Tournier, Isabelle UL; Vives, Marie-Frédérique; Postal, Virginie

in Swiss Journal of Psychology = Schweizerische Zeitschrift für Psychologie = Revue suisse de psychologie (2017), 76(2), 51-58

Detailed reference viewed: 6 (3 UL)
Full Text
Peer Reviewed
See detailN-point Virasoro algebras are multipoint Krichever-Novikov-type algebras
Schlichenmaier, Martin UL

in Communications in Algebra (2017), 45

Detailed reference viewed: 12 (0 UL)
Full Text
Peer Reviewed
See detailFormal modelling and analysis of receipt-free auction protocols in applied pi
Dong, Naipeng; Jonker, Hugo; Pang, Jun UL

in Computers & Security (2017), 65

Detailed reference viewed: 13 (0 UL)
Full Text
Peer Reviewed
See detailShould We Learn Probabilistic Models for Model Checking? A New Approach and An Empirical Study
Wang, Jingyi; Sun, Jun; Yuan, Qixia UL et al

in Proceedings of 20th International Conference on Fundamental Approaches to Software Engineering (2017)

Detailed reference viewed: 18 (2 UL)
Full Text
Peer Reviewed
See detailAdventures in Cultural Learning
Herman, Frederik UL; Roberts, Siân

in Paedagogica Historica (2017), 53(3),

In periods of disillusionment and crisis (war, occupation, migration, industrialisation), a greater “cultural vitality” seems to appear. Indeed, troubled pasts and presents have frequently acted as ... [more ▼]

In periods of disillusionment and crisis (war, occupation, migration, industrialisation), a greater “cultural vitality” seems to appear. Indeed, troubled pasts and presents have frequently acted as fertile breeding grounds for cultural productions and artistic manifestations — the cradle for a variety of ‘adventures in cultural learning’. Moreover, it is during these troubled times that culture is often radically re-enacted and re-evaluated as a medium to express unease and disgruntlement with the present, a vehicle to scrutinise problems, the means par excellence to provoke the masses in attempts to revolutionise society, or even as a kind of ‘therapeutic tool’. Thus, culture — while criticising atrocities and making radical propositions for the present and future — has frequently positioned itself at the vanguard of social critique and as a facilitator of societal change. Indeed it was, and still is, — to use Don Mitchell phrasing — “politics by another name” (2000, 3). It should, therefore, not surprise us that culture became a contested territory, a sought-after platform to reassert a certain image or to challenge and reconcile conflicting narratives of the past, present and future. In other words, it was and is believed that those who governed cultural capital/heritage controlled its diffusion and consumption, had/has power over meaning making, the ‘memory factory’ and, thus, identity construction. [less ▲]

Detailed reference viewed: 9 (1 UL)
Full Text
Peer Reviewed
See detailDynamic response functions and helical gaps in interacting Rashba nanowires with and without magnetic fields
Pedder, Christopher UL; Meng, Tobias; Tiwari, Rakesh et al

in Physical Review B (2016), 94(24), 245414

A partially gapped spectrum due to the application of a magnetic field is one of the main probes of Rashba spin-orbit coupling in nanowires. Such a ``helical gap'' manifests itself in the linear ... [more ▼]

A partially gapped spectrum due to the application of a magnetic field is one of the main probes of Rashba spin-orbit coupling in nanowires. Such a ``helical gap'' manifests itself in the linear conductance, as well as in dynamic response functions such as the spectral function, the structure factor, or the tunnelling density of states. In this paper, we investigate theoretically the signature of the helical gap in these observables with a particular focus on the interplay between Rashba spin-orbit coupling and electron-electron interactions. We show that in a quasi-one-dimensional wire, interactions can open a helical gap even without magnetic field. We calculate the dynamic response functions using bosonization, a renormalization group analysis, and the exact form factors of the emerging sine-Gordon model. For special interaction strengths, we verify our results by refermionization. We show how the two types of helical gaps, caused by magnetic fields or interactions, can be distinguished in experiments. [less ▲]

Detailed reference viewed: 4 (0 UL)
Full Text
See detailFractional charge oscillations in quantum spin Hall quantum dots
Traverso Ziani, Nicolo; Fleckenstein, Christoph; Dolcetto, Giacomo UL et al

E-print/Working paper (2016)

We show that correlated two-particle backscattering can induce fractional charge oscillations in a quantum dot built at the edge of a two-dimensional topological insulator by means of magnetic barriers ... [more ▼]

We show that correlated two-particle backscattering can induce fractional charge oscillations in a quantum dot built at the edge of a two-dimensional topological insulator by means of magnetic barriers. The result nicely complements recent works where the fractional oscillations were obtained employing of semiclassical treatments. Moreover, since by rotating the magnetization of the barriers a fractional charge can be trapped in the dot via the Jackiw-Rebbi mechanism, the system we analyze offers the opportunity to study the interplay between this noninteracting charge fractionalization and the fractionalization due to two-particle backscattering. In this context, we demonstrate that the number of fractional oscillations of the charge density depends on the magnetization angle. Finally, we address the renormalization induced by two-particle backscattering on the spin density, which is characterized by a dominant oscillation, sensitive to the Jackiw-Rebbi charge, with a wavelength twice as large as the charge density oscillations. [less ▲]

Detailed reference viewed: 5 (2 UL)
Full Text
Peer Reviewed
See detailL'intérim transfrontalier : les marges de l'emploi aux marges des territoires
Pigeron-Piroth, Isabelle UL; Belkacem, Rachid

in Revue Française de Socio-Economie (2016), 17(2nd semestre), 43-63

Within the Greater Region Saar-Lor-Lux (including one state: Luxembourg, and four regions: Saarland and Rhineland-Palatinate in Germany, Wallonia in Belgium and Lorraine in France), there is an increase ... [more ▼]

Within the Greater Region Saar-Lor-Lux (including one state: Luxembourg, and four regions: Saarland and Rhineland-Palatinate in Germany, Wallonia in Belgium and Lorraine in France), there is an increase in the number of cross-border workers as well as a diversification of this form of employment, including temporary work. Temporary work agencies now constitute new employment intermediaries inside this cross-border area. They favour the development of specific forms of employment and take advantage of the differences in social and fiscal rules between countries. [less ▲]

Detailed reference viewed: 9 (2 UL)
Full Text
Peer Reviewed
See detailLifting the Franck-Condon blockade in driven quantum dots
Haughian, Patrick UL; Walter, Stefan; Nunnenkamp, Andreas et al

in Physical Review. B : Condensed Matter (2016), 94

Electron-vibron coupling in quantum dots can lead to a strong suppression of the average current in the sequential tunneling regime. This effect is known as Franck-Condon blockade and can be traced back ... [more ▼]

Electron-vibron coupling in quantum dots can lead to a strong suppression of the average current in the sequential tunneling regime. This effect is known as Franck-Condon blockade and can be traced back to an overlap integral between vibron states with different electron numbers which becomes exponentially small for large electron-vibron coupling strength. Here, we investigate the effect of a time-dependent drive on this phenomenon, in particular the effect of an oscillatory gate voltage acting on the electronic dot level. We employ two different approaches: perturbation theory based on nonequilibrium Keldysh Green's functions and a master equation in Born-Markov approximation. In both cases, we find that the drive can lift the blockade by exciting vibrons. As a consequence, the relative change in average current grows exponentially with the drive strength. [less ▲]

Detailed reference viewed: 5 (0 UL)
Full Text
Peer Reviewed
See detailTuning Intermolecular Interactions with Nanostructured Environments
Chattopadhyaya, Mausumi; Hermann, Jan; Poltavsky, Igor et al

in Chemistry of Materials (2016), ASAP

Detailed reference viewed: 3 (0 UL)
See detailAnalysis of protein druggability in the alpha-synuclein regulatory network
Glaab, Enrico UL

Presentation (2016, October 07)

Detailed reference viewed: 10 (1 UL)
Peer Reviewed
See detailHelical gaps in interacting Rashba wires
Schmidt, Thomas UL

Scientific Conference (2016, September)

Detailed reference viewed: 8 (1 UL)
Full Text
Peer Reviewed
See detailBiobjective VoIP Service Management in Cloud Infrastructure
Cortes-Mendoza, Jorge; Tchernykh, Andrei; Armenta-Cano, Fermin et al

in Scientific Programming (2016), 14(5706790:1-5706790:14),

Voice over Internet Protocol (VoIP) allows communication of voice and/or data over the internet in less expensive and reliable manner than traditional ISDN systems. This solution typically allows flexible ... [more ▼]

Voice over Internet Protocol (VoIP) allows communication of voice and/or data over the internet in less expensive and reliable manner than traditional ISDN systems. This solution typically allows flexible interconnection between organization and companies on any domains. Cloud VoIP solutions can offer even cheaper and scalable service when virtualized telephone infrastructure is used in the most efficient way. Scheduling and load balancing algorithms are fundamental parts of this approach. Unfortunately, VoIP scheduling techniques do not take into account uncertainty in dynamic and unpredictable cloud environments. In this paper, we formulate the problem of scheduling of VoIP services in distributed cloud environments and propose a new model for biobjective optimization. We consider the special case of the on-line nonclairvoyant dynamic bin-packing problem and discuss solutions for provider cost and quality of service optimization. We propose twenty call allocation strategies and evaluate their performance by comprehensive simulation analysis on real workload considering six months of the MIXvoip company service. [less ▲]

Detailed reference viewed: 4 (0 UL)