Last 7 days
Bookmark and Share    
Full Text
Peer Reviewed
See detailA Multiscale DEM-VOF Method for the simulation of three-phase flows
Pozzetti, Gabriele UL; Peters, Bernhard UL

in International Journal of Multiphase Flow (2018), 99

A novel multiscale approach for three-phase flows is presented. The goal of the proposed method is to solve arbitrary three-phase flow configurations in a computationally efficient way, and in particular ... [more ▼]

A novel multiscale approach for three-phase flows is presented. The goal of the proposed method is to solve arbitrary three-phase flow configurations in a computationally efficient way, and in particular taking into account the effects of different length scales while sharply reducing the computational burden. This is particularly important in chemical, environmental, and process engineering, where large-scale quantities are normally of interest, but small-scale dynamics cannot be neglected. The method is based on the definition of two different length scales: the bulk scale, and the fluid fine scale. A dual-grid approach is adopted in order to resolve the bulk scale with information from the fluid fine scale. It is shown that the described method succeeds in delivering more accuracy than a standard approach based on the volume averaging technique, still, it remains suitable for the solution of real interest problems. The method is shown to successfully satisfy experimental results presented in the literature. Examples of three-phase flows simulations are provided to show how the proposed numerical approach can describe the physics of particle-laden, free surface flows with competitive computational cost. It is shown how the proposed method can naturally extend the DEM-VOF method to the presence of complex interface dynamics. [less ▲]

Detailed reference viewed: 78 (14 UL)
See detailHistoriker und die Konstruktion von Zeitgenossenschaft. Eine Projektskizze am Beispiel der Militärverwaltung Belgien-Nordfrankreich im Zweiten Weltkrieg
Brüll, Christoph UL

Presentation (2018, January 09)

Gegenstand des Projekts ist die Konstruktion des Zeitzeugendiskurses mehrerer führender Mitglieder der deutschen Militärverwaltung in Brüssel. Arbeitshypothese ist, dass die Konstruktion in drei Phasen ... [more ▼]

Gegenstand des Projekts ist die Konstruktion des Zeitzeugendiskurses mehrerer führender Mitglieder der deutschen Militärverwaltung in Brüssel. Arbeitshypothese ist, dass die Konstruktion in drei Phasen verlief: Der „Generalprozess“ (1950-1951) gegen Alexander von Falkenhausen und Eggert Reeder (gefolgt von einer Reihe anderer Prozesse bis in die 1980er Jahre hinein). Die Legitimierungs- und Verteidigungsdiskurse einiger Akteure gegenüber Anschuldigungen, die ihre Tätigkeiten während des Krieges betrafen. Ihre Tätigkeit als Zeitzeuge für belgische und deutsche Historiker und Journalisten seit den 1970er Jahren. [less ▲]

Detailed reference viewed: 12 (0 UL)
Full Text
See detailGradient Estimates on Dirichlet and Neumann Eigenfunctions
Arnaudon, Marc; Thalmaier, Anton UL; Wang, Feng-Yu

E-print/Working paper (2018)

By methods of stochastic analysis on Riemannian manifolds, we derive explicit two-sided gradient estimates for Dirichlet eigenfunctions on a d-dimensional compact Riemannian manifold D with boundary ... [more ▼]

By methods of stochastic analysis on Riemannian manifolds, we derive explicit two-sided gradient estimates for Dirichlet eigenfunctions on a d-dimensional compact Riemannian manifold D with boundary. Corresponding two-sided gradient estimates for Neumann eigenfunctions are derived in the second part of the paper. [less ▲]

Detailed reference viewed: 40 (7 UL)
Full Text
See detailProceedings - 2017 ILILAS Distinguished Lectures
Bouvry, Pascal UL; Bisdorff, Raymond; Schommer, Christoph UL et al

Report (2018)

The Proceedings summarizes the 12 lectures that have taken place within the ILIAS Dinstguished Lecture series 2017. It contains a brief abstract of the talks as well as some additional information about ... [more ▼]

The Proceedings summarizes the 12 lectures that have taken place within the ILIAS Dinstguished Lecture series 2017. It contains a brief abstract of the talks as well as some additional information about each speaker. [less ▲]

Detailed reference viewed: 50 (5 UL)
Full Text
See detailBrexit Seen from Luxembourg
Högenauer, Anna-Lena UL

E-print/Working paper (2018)

Detailed reference viewed: 11 (3 UL)
Full Text
Peer Reviewed
See detailThe Temporary Reintroduction of Border Controls Inside the Schengen Area: Towards a Spatial Perspective
Evrard, Estelle UL; Nienaber, Birte UL; Sommarribas, Adolfo UL

in Journal of Borderlands Studies (2018)

Following the terrorist attacks in Paris (November 2015) and Brussels (March 2016), several EU Member States have decided to re-establish border controls or to build walls inside the Schengen Area ... [more ▼]

Following the terrorist attacks in Paris (November 2015) and Brussels (March 2016), several EU Member States have decided to re-establish border controls or to build walls inside the Schengen Area. Although these decisions are temporary and legally framed by the Schengen code, their extent disrupts the free movement within the Schengen Area, in particular in border areas. While lawyers and economists have analyzed the impacts of this situation, the spatial perspective has remained rather neglected. This exploratory contribution aims to address this gap in the literature by outlining the spatial significance of reintroduced controls for border areas inside the Schengen Area. This contribution firstly undertakes a literature review of the different conceptual tools at hand. These are then compared with a set of exploratory empirical materials. The article focuses more precisely on the Greater Region where France and Germany have reintroduced border controls, thus disrupting in particular daily cross-border flows with Luxembourg and Belgium. The analysis demonstrates that the border acts as a filter, disrupting cross-border flows and cooperation. Also, it sheds some light on the important role played by the ideational perception of the border for practitioners and decision-makers. This contribution concludes by suggesting several paths for a future research agenda. [less ▲]

Detailed reference viewed: 27 (4 UL)
Full Text
Peer Reviewed
See detailÉvaluations numériques: quel rôle pour l’expérience utilisateur ?
Pere, Maxime UL; Lallemand, Carine UL; Koenig, Vincent UL

Scientific Conference (2018, January)

Detailed reference viewed: 42 (12 UL)
Full Text
Peer Reviewed
See detailAnticipating Suspicious Actions using a Small Dataset of Action Templates
Baptista, Renato UL; Antunes, Michel; Aouada, Djamila UL et al

in 13th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications (VISAPP) (2018, January)

In this paper, we propose to detect an action as soon as possible and ideally before it is fully completed. The objective is to support the monitoring of surveillance videos for preventing criminal or ... [more ▼]

In this paper, we propose to detect an action as soon as possible and ideally before it is fully completed. The objective is to support the monitoring of surveillance videos for preventing criminal or terrorist attacks. For such a scenario, it is of importance to have not only high detection and recognition rates but also low time latency for the detection. Our solution consists in an adaptive sliding window approach in an online manner, which efficiently rejects irrelevant data. Furthermore, we exploit both spatial and temporal information by constructing feature vectors based on temporal blocks. For an added efficiency, only partial template actions are considered for the detection. The relationship between the template size and latency is experimentally evaluated. We show promising preliminary experimental results using Motion Capture data with a skeleton representation of the human body. [less ▲]

Detailed reference viewed: 29 (5 UL)
Full Text
Peer Reviewed
See detail‘Cruise to the Edge’. How 1970s prog-rock dinos found a safe haven on the cruise ship
Hesse, Markus UL

in Monios, Jason; Wilmsmeier, Gordon (Eds.) Maritime Mobilities (2018)

Detailed reference viewed: 16 (0 UL)
Full Text
Peer Reviewed
See detailThe Controlled Foreign Company Regime
Haslehner, Werner UL

in Weber, Dennis; Van de Streek, Jan (Eds.) The EU Common Consolidated Corporate Tax Base - Critical Analysis (2018)

The Controlled Foreign Company (CFC) regime proposed by the Commission as part of the newly launched Common Corporate Tax Base (CCTB) project reflects the perceived need to strengthen the Union’s anti-tax ... [more ▼]

The Controlled Foreign Company (CFC) regime proposed by the Commission as part of the newly launched Common Corporate Tax Base (CCTB) project reflects the perceived need to strengthen the Union’s anti-tax avoidance measures, and specifically to discourage profit shifting to low-tax jurisdictions. The proposed rule largely reflects previous work done by the OECD as part of the BEPS project and the EU implementation measures in the Anti-Tax Avoidance Directive (ATAD), but it deviates from both in a number of its details. This contribution aims to provide a first technical analysis of the provision to reveal its scope, its mechanism, and apparent shortcomings. It furthermore tries to imbed it in its context of existing primary and secondary EU law. [less ▲]

Detailed reference viewed: 34 (2 UL)
Full Text
See detailEnergy, Risk and Governance: The Case of Nuclear Energy in India
Wong, Catherine UL

Book published by Palgrave Macmillan (2018)

This book is about how risk, energy and governance are intertwined in the development of the nuclear industry in India and its relationship with the Indian public. It provides a rare insider-view of how ... [more ▼]

This book is about how risk, energy and governance are intertwined in the development of the nuclear industry in India and its relationship with the Indian public. It provides a rare insider-view of how the nuclear establishment thinks about risk and contrasts that with public understandings of nuclear risk. Through that, the book presents a more nuanced picture of why nuclear energy is considered a rational choice in spite of the risks; the ambiguities in both expert and public risk perceptions; and the internal reflexivities that have emerged within the nuclear establishment as a result of the Fukushima-Daiichi disaster which are not displayed in the public discourse. The insights in this book are not unique to India and similar observations can easily be made in the global nuclear industry. Reflecting on what this means for risk governance in practice, the book proposes a toolkit that practitioners in the nuclear industry can use in public engagement, risk communication and deliberation at various stages of decision-making. [less ▲]

Detailed reference viewed: 63 (4 UL)
Full Text
See detailInherently Unneutral Investment Treaty Arbitration: The Formation of Decisive Arguments in Jurisdictional Determinations
Radović, Relja UL

in Journal of Dispute Resolution (2018), 2018(1), 143-183

Detailed reference viewed: 14 (1 UL)
Full Text
Peer Reviewed
See detailImpact of the height imperfections of masonry blocks on the load bearing capacity of dry-stack masonry walls
Chewe Ngapeya, Gelen Gael UL; Waldmann, Danièle UL; Scholzen, Frank UL

in in press ELSEVIER Construction and Building Materials (TOP10 journal) (2018)

Dry-stacked masonry walls gives rise to geometric imperfections: the height variation of different masonry blocks ΔH and the roughness of the support area Δh. This paper studies the effect of ΔH on the ... [more ▼]

Dry-stacked masonry walls gives rise to geometric imperfections: the height variation of different masonry blocks ΔH and the roughness of the support area Δh. This paper studies the effect of ΔH on the structural response and the load bearing capacity of masonry walls by highlighting the load percolation. Furthermore, an algorithm was developed to define a stress multiplier coefficient respecting the imperfections ΔH. The algorithm allowed predicting 77% of the amplified stress compared to the FE analysis and showed that the geometric imperfections govern the load percolation in a wall as well as the cracking mode and the bearing capacity. [less ▲]

Detailed reference viewed: 37 (14 UL)
Full Text
See detailGeschwindigkeitskontrollen im Strassenverkehr - eine wirksame repressive Methode?
Steffgen, Georges UL

Article for general public (2018)

Detailed reference viewed: 7 (2 UL)
Full Text
Peer Reviewed
See detailA Latent State-Trait Analysis of Interoceptive Accuracy
Wittkamp, M.; Bertsch, K.; Vögele, Claus UL et al

in Psychophysiology (2018), e0185802

Interoceptive accuracy (IAc), i.e. the ability to accurately perceive one’s own bodily signals, is widely assumed to be a trait, although experimental manipulations, such as stress, may affect IAc. We ... [more ▼]

Interoceptive accuracy (IAc), i.e. the ability to accurately perceive one’s own bodily signals, is widely assumed to be a trait, although experimental manipulations, such as stress, may affect IAc. We used structural equation modeling to estimate the reliability of IAc, and the proportions of individual differences in IAc, explained by a trait and occasion-specific effects of situation and person-situation interactions. We assessed IAc in 59 healthy participants (40 women, MAge = 23.4 years) on three consecutive measurement occasions, approx. one week apart, in a ‘rest’ and ‘poststress’ condition, using a heartbeat counting and a heartbeat discrimination task. The results show fair temporal stability (intraclass correlation coefficients ≥ 0.38) and good reliability (Mdn = .63; range .49-.83) for both methods. While around 40% of the variance of a single IAc measurement could be explained by a trait, approx. 27% were accounted for by occasion-specific effects of situation and person-situation interaction. These results suggest that IAc measures are relatively consistent and that situations and person-situation interactions impact IAc as measured at a certain point in time. An aggregation across at least two measurements is recommended when using IAc as a trait variable. [less ▲]

Detailed reference viewed: 52 (5 UL)
See detailTyranny of Writing: Ideologies of the Written Word
Weth, Constanze UL; Juffermans, Kasper UL

Book published by Bloomsbury (2018)

Detailed reference viewed: 10 (0 UL)