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See detailVibrational properties of hexagonal boron nitride: Inelastic X-ray scattering and ab initio calculations
Serrano, J.; Bosak, A.; Arenal, R. et al

in Physical Review Letters (2007), 98(9), 095503

The phonon dispersion relations of bulk hexagonal boron nitride have been determined from inelastic x-ray scattering measurements and analyzed by ab initio calculations. Experimental data and calculations ... [more ▼]

The phonon dispersion relations of bulk hexagonal boron nitride have been determined from inelastic x-ray scattering measurements and analyzed by ab initio calculations. Experimental data and calculations show an outstanding agreement and reconcile the controversies raised by recent experimental data obtained by electron-energy loss spectroscopy and second-order Raman scattering. [less ▲]

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See detailVibrational properties of LaNiO3 films in the ultrathin regime
Schober, Alexander; Fowlie, Jennifer; Guennou, Mael UL et al

in APL Materials (2020)

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See detailVibrational properties of LaNiO3 films in the ultrathin regime
Schober, Alexander; Fowlie, Jennifer; Guennou, Mael UL et al

in APL MATERIALS (2020), 8(6),

Collective rotations and tilts of oxygen polyhedra play a crucial role in the physical properties of complex oxides such as magnetism and conductivity. Such rotations can be tuned by preparing thin films ... [more ▼]

Collective rotations and tilts of oxygen polyhedra play a crucial role in the physical properties of complex oxides such as magnetism and conductivity. Such rotations can be tuned by preparing thin films in which dimensionality, strain, and interface effects come into play. However, little is known of the tilt and rotational distortions in films a few unit cells thick including the question of if coherent tilt patterns survive at all in this ultrathin limit. Here, a series of films of perovskite LaNiO3 is studied and it is shown that the phonon mode related to oxygen octahedral tilts can be followed by Raman spectroscopy down to a film thickness of three pseudocubic perovskite unit cells (similar to 1.2 nm). To push the limits of resolution to the ultrathin regime, a statistical analysis method is introduced to separate the Raman signals of the film and substrate. Most interestingly, these analyses reveal a pronounced hardening of the tilt vibrational mode in the thinnest films. A comparison between the experimental results, first principles simulations of the atomic structure, and the standing wave model, which accounts for size effects on the phononic properties, reveals that in the ultrathin regime, the Raman spectra are a hybrid entity of both the bulk and surface phononic behavior. These results showcase Raman spectroscopy as a powerful tool to probe the behavior of perovskite films down to the ultrathin limit. [less ▲]

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See detailVibrations due to hydroshield tunnelling
Van Baars, Stefan UL

in Proceedings of the 9th International Conference on Structural Dynamics, EURODYN 2014 (2014, June)

The Hubertus tunnel in Den Hague, the Netherlands, is a 1.5 km long bored tunnel, mostly below groundwater level, constructed with a hydro-shield Tunnel Boring Machine in 2006 and 2007. The vibrations due ... [more ▼]

The Hubertus tunnel in Den Hague, the Netherlands, is a 1.5 km long bored tunnel, mostly below groundwater level, constructed with a hydro-shield Tunnel Boring Machine in 2006 and 2007. The vibrations due to the tunnelling have been recorded both inside the tunnel and at ground surface. No harmful vibrations were observed while the Hubertus tunnel was being bored, although unexpected vibration nuisance did occur. This is an effect that is widely known when tunnelling in rock, but was not expected when tunnelling in beach sand. Analyses of the recorded vibrations showed that the vibrations were mainly caused by the trembling motion of the TBM in the sand as a result of the stick-slip effect. This creates shear waves along the TBM shaft and pressure waves at the bore front. Both waves travel in an axial direction. [less ▲]

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See detailVicarious pain while observing another in pain: an experimental approach.
Vandenbroucke, S.; Crombez, G.; Van Ryckeghem, Dimitri UL et al

in Frontiers in human neuroscience (2013), 7

OBJECTIVE: This study aimed at developing an experimental paradigm to assess vicarious pain experiences. We further explored the putative moderating role of observer's characteristics such as ... [more ▼]

OBJECTIVE: This study aimed at developing an experimental paradigm to assess vicarious pain experiences. We further explored the putative moderating role of observer's characteristics such as hypervigilance for pain and dispositional empathy. METHODS: Two experiments are reported using a similar procedure. Undergraduate students were selected based upon whether they reported vicarious pain in daily life, and categorized into a pain responder group or a comparison group. Participants were presented a series of videos showing hands being pricked whilst receiving occasionally pricking (electrocutaneous) stimuli themselves. In congruent trials, pricking and visual stimuli were applied to the same spatial location. In incongruent trials, pricking and visual stimuli were in the opposite spatial location. Participants were required to report on which location they felt a pricking sensation. Of primary interest was the effect of viewing another in pain upon vicarious pain errors, i.e., the number of trials in which an illusionary sensation was reported. Furthermore, we explored the effect of individual differences in hypervigilance to pain, dispositional empathy and the rubber hand illusion (RHI) upon vicarious pain errors. RESULTS: RESULTS of both experiments indicated that the number of vicarious pain errors was overall low. In line with expectations, the number of vicarious pain errors was higher in the pain responder group than in the comparison group. Self-reported hypervigilance for pain lowered the probability of reporting vicarious pain errors in the pain responder group, but dispositional empathy and the RHI did not. CONCLUSION: Our paradigm allows measuring vicarious pain experiences in students. However, the prevalence of vicarious experiences of pain is low, and only a small percentage of participants display the phenomenon. It remains however unknown which variables affect its occurrence. [less ▲]

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See detailVicarious Viewing Time: Prolonged Response Latencies for Sexually Attractive Targets as a Function of Task- or Stimulus-Specific Processing
Imhoff, Roland; Schmidt, Alexander F. UL; Weiss, Simone et al

in ARCHIVES OF SEXUAL BEHAVIOR (2012), 41(6), 1389-1401

The amount of time an individual spends gazing at images is longer if the depicted person is sexually appealing. Despite an increasing use of such response latencies as a diagnostic tool in applied ... [more ▼]

The amount of time an individual spends gazing at images is longer if the depicted person is sexually appealing. Despite an increasing use of such response latencies as a diagnostic tool in applied forensic settings, the underlying processes that drive the seemingly robust effect of longer response latencies for sexually attractive targets remain unknown. In the current study, two alternative explanations are presented and tested using an adapted viewing time paradigm that disentangled task- and stimulus-specific processes. Heterosexual and homosexual male participants were instructed to rate the sexual attractiveness of target persons differing in sex and sexual maturation from four experimentally assigned perspectives-heterosexual and homosexual perspectives for both sexes. This vicarious viewing time paradigm facilitated the estimation of the independent contributions of task (assigned perspective) and stimuli to viewing time effects. Results showed a large task-based effect as well as a relatively smaller stimulus-based effect. This pattern suggests that, when viewing time measures are used for the assessment of sexual interest, it should be taken into consideration that response latency patterns can be biased by judging images from a selected perspective. [less ▲]

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See detailVicinity Resource Cartography for Delay-Tolerant Networks: a Holistic Perspective
Sandulescu, Gabriel UL; Schaffer, Peter UL; Nadjm-Tehrani, Simin UL

in 2010 IFIP W IRELESS D AYS (2010)

In this paper we propose a distributed algorithm allowing nodes in delay-tolerant networks to construct vicinity resource maps based on past encounters. Our algorithm estimates the availability of the ... [more ▼]

In this paper we propose a distributed algorithm allowing nodes in delay-tolerant networks to construct vicinity resource maps based on past encounters. Our algorithm estimates the availability of the following resources: energy, buffer space, and bandwidth. We then show how a store-carry-forward scheme may benefit from having access to these resource estimates. While knowledge about resources available in the vicinity allows nodes to implement meaningful custodian election strategies, an evaluation of available bandwidth and contact time allows them to carry out adaptive queue management strategies. Thus, such strategies can be approached from a holistic perspective based on the availability of the three resources under consideration in node proximity.We validate our model separately in time-varying and space-varying environments. In addition to synthetic mobility models (random waypoint) we validate our resource estimation in a disaster area mobility model (using Bonn motion traces). We show that by using this information a routing protocol may dramatically improve its delivery rate and energy overhead while keeping delivery latency almost constant. [less ▲]

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See detailVíctima y "supervictima" en la Justicia Penal Europea
Allegrezza, Silvia UL

in La Víctima Menor de Edad. Un estudio comparado Europa-América, Madrid (2012)

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See detailLa victime : pour une approche éthique du corps meurtri
Sosoe, Lukas UL

in Dumouchel, Paul (Ed.) Violences, Victimes, Vengeances (2000)

Detailed reference viewed: 43 (1 UL)
See detailLes victimes de la grève des ouvriers italiens de l'usine de Differdange de janvier 1912
Scuto, Denis UL

in Reuter, Antoinette; Ruiz, Jean-Philippe (Eds.) RRetour de Babel. Itinéraires, mémoires et citoyenneté (2007)

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See detailVictimization and Safety in Luxembourg - Findings of the "Enquête sur la sécurité 2013"
Heinz, Andreas UL; Steffgen, Georges UL; Willems, Helmut UL

E-print/Working paper (2015)

Cette publication présente les principaux résultats de « l'Enquête sur la sécurité 2013 » réalisée au Luxembourg par le STATEC et l'Université du Luxembourg/INSIDE. Les principaux objectifs de l’enquête ... [more ▼]

Cette publication présente les principaux résultats de « l'Enquête sur la sécurité 2013 » réalisée au Luxembourg par le STATEC et l'Université du Luxembourg/INSIDE. Les principaux objectifs de l’enquête étaient de mesurer les taux de prévalence des délits de droit commun et de sonder les comportements relatifs à la délinquance et la sécurité. [less ▲]

Detailed reference viewed: 159 (19 UL)
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See detailVictims of domestic violence in the Italian judicial system
Allegrezza, Silvia UL

in Luparia, Luca (Ed.) Victims and criminal justice. European standards and National Practices (2015)

Detailed reference viewed: 118 (20 UL)
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See detailVictims Statute within the Directive 2012/29/EU
Allegrezza, Silvia UL

in Luparia, Luca (Ed.) Victims and criminal justice. European standards and National Practices (2015)

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See detailVictoire à la Pyrhus pour l'Etat Belge dans l'Affaire Fortis
Conac, Pierre-Henri UL

in Revue Pratique des Sociétés (2009), 04

Detailed reference viewed: 46 (0 UL)
See detailVictor Hugo
Wilhelm, Frank UL

in Kmec, Sonja; Péporté, Pit (Eds.) Lieux de mémoire au Luxembourg. Jeux d’échelles. Erinnerungsorte in Luxemburg. Perspektivenwechsel 2 (2012)

Detailed reference viewed: 35 (1 UL)
See detailVictor Hugo et Versailles
Erchadi, Armand UL

Speeches/Talks (2005)

Detailed reference viewed: 15 (0 UL)
See detailVictor Hugo: la mise en scène de l’humanisme et de la tolérance dans Les Misérables
Wilhelm, Frank UL

in Walter, Jacques (Ed.) Humanisme & tolérance. Hommage à Alexandre Marius Dées de Sterio (1944-2006) (2012)

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See detailVictorian Celebrity Culture and Tennyson's Circle
Millim, Anne-Marie UL

Book published by Palgrave (2013)

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See detailThe Victorian Diary: Authorship and Emotional Labour
Millim, Anne-Marie UL

Book published by Ashgate (2013)

In her examination of neglected diaristic texts, Anne-Marie Millim expands the field of Victorian diary criticism by complicating the conventional notion of diaries as mainly private sources of ... [more ▼]

In her examination of neglected diaristic texts, Anne-Marie Millim expands the field of Victorian diary criticism by complicating the conventional notion of diaries as mainly private sources of biographical information. She argues that for Elizabeth Rigby Eastlake, Henry Crabb Robinson, George Eliot, George Gissing, John Ruskin, Edith Simcox and Gerard Manley Hopkins, the exposure or publication of their diaries was a real possibility that they either coveted or feared. Millim locates the diary at the intersection of the public and private spheres to show that well-known writers and public figures of both sexes exploited the diary's self-reflexive, diurnal structure in order to enhance their creativity and establish themselves as authors. Their object was to manage, rather than to indulge or repress, their emotions for the purposes of perfecting their observational and critical skills. Reading these diaries as literary works in their own right, Millim analyses their crucial role in the construction of authorship. By relating these Victorian writers' diaries to their publications and to contemporary works of cultural criticism, Millim shows the multifarious ways in which diaristic practices, emotional management and professional output corresponded to experiences of the literary marketplace and to nineteenth-century codes of propriety. [less ▲]

Detailed reference viewed: 81 (3 UL)