Last 7 days
Bookmark and Share    
Full Text
Peer Reviewed
See detailFlexible body scanning without template models
Munoz-Salinas, Rafael; Sarmadi, Hamid; Cazzato, Dario UL et al

in Signal Processing (2019), 154

The apparition of low-cost depth cameras has lead to the development of several reconstruction methods that work well with rigid objects, but tend to fail when used to manually scan a standing person ... [more ▼]

The apparition of low-cost depth cameras has lead to the development of several reconstruction methods that work well with rigid objects, but tend to fail when used to manually scan a standing person. Specific methods for body scanning have been proposed, but they have some ad-hoc requirements that make them unsuitable in a wide range of applications: they either require rotation platforms, multiple sensors and a priori template model. Scanning a person with a hand-held low-cost depth camera is still a challenging unsolved problem. This work proposes a novel solution to easily scan standing persons by combining depth information with fiducial markers without using a template model. In our approach, a set of markers placed in the ground are used to improve camera tracking by a novel algorithm that fuses depth information with the known location of the markers. The proposed method analyzes the video sequence and automatically divides it into fragments that are employed to build partial overlapping scans of the subject. Then, a registration step (both rigid and non-rigid) is applied to create a final mesh of the scanned subject. The proposed method has been compared with the state-of-the-art KinectFusion [1], ElasticFusion [2], ORB-SLAM [3, 4], and BundleFusion [5] methods, exhibiting superior performance. [less ▲]

Detailed reference viewed: 24 (1 UL)
Full Text
See detailLuxembourg
Covolo, Valentina UL

in Ruggeri, Stefano; Quattrocolo, Serena (Eds.) Personal Participation in Criminal Proceedings. A Comparative Study of Participatory Safeguards and in absentia Trials in Europe (2019)

In the last decade, Luxembourg law governing in absentia proceedings was subject to legislative reforms intended to enhance the rights of suspects and accused persons. In particular, the amendments ... [more ▼]

In the last decade, Luxembourg law governing in absentia proceedings was subject to legislative reforms intended to enhance the rights of suspects and accused persons. In particular, the amendments adopted in 2008 and 2017 aimed to make national criminal procedure compliant with the ECtHR case law and the ABC Directives. Against this background, the present contribution aims to analyse legal framework governing in absentia and inaudito reo proceedings in Luxembourg. [less ▲]

Detailed reference viewed: 23 (1 UL)
Peer Reviewed
See detailGender differences with regard to physical activity motivation and behavior in physical education and leisure time
Hutmacher, Djenna UL; Eckelt, Melanie UL; Bund, Andreas UL et al

Scientific Conference (2019, January)

Objectives: Given a widespread continuous decrease in children’s and adoles-cents’ 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 adoles-cents’ physical activity (PA), the potential of physical education (PE) in promoting young people’s PA motivation and behavior has become a key issue in research. Based on the self-determination theory (SDT) of Deci and Ryan (1985), the present study aimed to ex-amine gender differences with regard to PA motivation and behavior during PE and lei-sure time (LT). Previously, girls were found to be more self-determined than boys (Wil-liams & Deci, 1996), but showed lower self-reported PA and were meeting the PA guide-lines of the WHO to a lesser extent (Trost et al., 2002). Method: 244 students (139 girls and 125 boys) from 11 to 21 years participated in the study. PA motivation was assessed via a digital questionnaire containing the scales need support (Standage, Duda and Ntoumanis, 2005), basic needs (BPNES; Vlachopou-los, Ntoumanis & Smith, 2010), external and intrinsic motivation in PE (PLOC-R; Vla-chopoulos et al., 2011) and in LT (BREQ-II; Markland & Tobin, 2004). PA behavior was measured through a self-report questionnaire (Schmidt, Will, Henn, Reimers & Woll, 2016). Additionally, 76 students (38 girls and 38 boys) wore an accelerometer (ActiGraph GT3X-BT) over seven consecutive days to measure PA behavior objectively, too. Results: With regard to PA motivation, girls reported a lower fulfillment in the basic need of competence during PE and scored higher in the external motivation during PE and LT than boys. In contrast, boys reported higher rates of intrinsic motivation during PE and LT. Concerning PA behavior, boys showed higher PA than girls for self-reported and objectively measured PA in PE and LT. Independently of gender, higher levels of intrinsic motivation were associated with increased self-reported PA. Discussion: In conflict with previous findings, girls reported a lower intrinsic motiva-tion in PA than boys. As girls simultaneously show lower self-reported and objectively measured PA, future intervention programs should focus on strengthening the more in-ternally driven behavior of girls in order to foster regular PA. Key Reference: Deci, E.L. & Ran, R.M. (1985). Intrinsic motivation and self-determination in human behav-ior. New York: Plenum Press. [less ▲]

Detailed reference viewed: 92 (22 UL)
Full Text
Peer Reviewed
See detailSpin and charge currents induced by the spin Hall and anomalous Hall effects upon crossing ferromagnetic/nonmagnetic interfaces
Hönemann, Albert; Herschbach, Christian; Fedorov, Dmitry UL et al

in Physical Review. B (2019), 99

We start closing a gap in the comparison of experimental and theoretical data associated with the spin Hall effect. Based on a first-principles characterization of electronic structure and a semiclassical ... [more ▼]

We start closing a gap in the comparison of experimental and theoretical data associated with the spin Hall effect. Based on a first-principles characterization of electronic structure and a semiclassical description of electron transport, we compute the skew-scattering contribution to the transverse spin and charge currents generated by spin and anomalous Hall effect in a Co/Cu multilayer system doped with Bi impurities. The fact that the created currents cross the interface between the two materials strongly influences the efficiency of charge-to-spin current conversion, as demonstrated by our results. [less ▲]

Detailed reference viewed: 22 (1 UL)
See detailKarl IV. und sein Halbbruder Wenzel. Das Herzogtum Luxemburg und Karls Politik im Westen des Reiches
Pauly, Michel UL

in Bendheim, Amelie; Sieburg, Heinz (Eds.) Prag in der Zeit der Luxemburger Dynastie. Literatur, Religion und Herrschaftskulturen zwischen Bereicherung und Behauptung (2019)

Detailed reference viewed: 21 (2 UL)
Full Text
Peer Reviewed
See detailDisorder-driven exceptional lines and Fermi ribbons in tilted nodal-line semimetals
Moors, Kristof; Zyuzin, Alexander A.; Zyuzin, Alexander Yu. et al

in Physical Review. B, Condensed Matter (2019), 99

We consider the impact of disorder on the spectrum of three-dimensional nodal-line semimetals. We show that the combination of disorder and a tilted spectrum naturally leads to a non-Hermitian self-energy ... [more ▼]

We consider the impact of disorder on the spectrum of three-dimensional nodal-line semimetals. We show that the combination of disorder and a tilted spectrum naturally leads to a non-Hermitian self-energy contribution that can split a nodal line into a pair of exceptional lines. These exceptional lines form the boundary of an open and orientable bulk Fermi ribbon in reciprocal space on which the energy gap vanishes. We find that the orientation and shape of such a disorder-induced bulk Fermi ribbon is controlled by the tilt direction and the disorder properties, which can also be exploited to realize a twisted bulk Fermi ribbon with nontrivial winding number. Our results put forward a paradigm for the exploration of non-Hermitian topological phases of matter. [less ▲]

Detailed reference viewed: 33 (4 UL)
Full Text
See detailReport on political participation of mobile EU citizens: Luxembourg
Scuto, Denis UL; Besch, Sylvain

Report (2019)

Detailed reference viewed: 19 (0 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; Laskaris, Georgios UL et al

Scientific Conference (2019, January)

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

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: 85 (1 UL)
Full Text
Peer Reviewed
See detail3‑Phosphoglycerate Transhydrogenation Instead of Dehydrogenation Alleviates the Redox State Dependency of Yeast de Novo L‑Serine Synthesis
Paczia, Nicole UL; Becker, Julia UL; Conrotte, Jean-François UL et al

in Biochemistry (2019)

The enzymatic mechanism of 3-phosphoglycerate to 3-phosphohydroxypyruvate oxidation, which forms the first step of the main conserved de novo serine synthesis pathway, has been revisited recently in ... [more ▼]

The enzymatic mechanism of 3-phosphoglycerate to 3-phosphohydroxypyruvate oxidation, which forms the first step of the main conserved de novo serine synthesis pathway, has been revisited recently in certain microorganisms. While this step is classically considered to be catalyzed by an NAD-dependent dehydrogenase (e.g., PHGDH in mammals), evidence has shown that in Pseudomonas, Escherichia coli, and Saccharomyces cerevisiae, the PHGDH homologues act as transhydrogenases. As such, they use α-ketoglutarate, rather than NAD+, as the final electron acceptor, thereby producing D-2-hydroxyglutarate in addition to 3-phosphohydroxypyruvate during 3-phosphoglycerate oxidation. Here, we provide a detailed biochemical and sequence−structure relationship characterization of the yeast PHGDH homologues, encoded by the paralogous SER3 and SER33 genes, in comparison to the human and other PHGDH enzymes. Using in vitro assays with purified recombinant enzymes as well as in vivo growth phenotyping and metabolome analyses of yeast strains engineered to depend on either Ser3, Ser33, or human PHGDH for serine synthesis, we confirmed that both yeast enzymes act as transhydrogenases, while the human enzyme is a dehydrogenase. In addition, we show that the yeast paralogs differ from the human enzyme in their sensitivity to inhibition by serine as well as hydrated NADH derivatives. Importantly, our in vivo data support the idea that a 3PGA transhydrogenase instead of dehydrogenase activity confers a growth advantage under conditions where the NAD+:NADH ratio is low. The results will help to elucidate why different species evolved different reaction mechanisms to carry out a widely conserved metabolic step in central carbon metabolism. [less ▲]

Detailed reference viewed: 29 (4 UL)
Full Text
See detailBeyond the bordering perspective: Rezente Entwicklungen in den Border Studies
Wille, Christian UL

Presentation (2019, January)

Die Border Studies sind ein aufstrebendes Arbeitsfeld und erfassen zunehmend mehr Disziplinen. Dabei hat sich eine Untersuchungsperspektive durchgesetzt, die sich an den Akten der Hervorbringung von ... [more ▼]

Die Border Studies sind ein aufstrebendes Arbeitsfeld und erfassen zunehmend mehr Disziplinen. Dabei hat sich eine Untersuchungsperspektive durchgesetzt, die sich an den Akten der Hervorbringung von Grenzen und Grenzräumen orientiert und als practice shift bezeichnet werden kann. Sie ist allerdings in die Kritik geraten und erfährt in jüngster Zeit eine dynamische Weiterentwicklung. Sie gründet auf dem Anliegen border(ing) practices weitgreifender zu erfassen und ihrer Vielschichtigkeit gerecht zu werden. Der Vortrag greift diese Entwicklung auf, beleuchtet zentrale Prämissen und Ansätze und skizziert die Umrisse eines sich vollziehenden complexity shift in den Border Studies. Vor diesem Hintergrund wird abschließend die Rolle der disziplinenübergreifenden Zusammenarbeit in der zukünftigen Grenz(raum)forschung thematisiert. [less ▲]

Detailed reference viewed: 20 (3 UL)
Full Text
Peer Reviewed
See detailFollow the Money, If You Can - Possible Solutions for Enhanced FIU Cooperation Under Improved Data Protection Rules
Quintel, Teresa Alegra UL

E-print/Working paper (2019)

Financial information can play a key role in tackling Money Laundering (ML), Terrorist Financing (TF) and combatting serious crime more generally. Preventing and fighting ML and the financing of terrorism ... [more ▼]

Financial information can play a key role in tackling Money Laundering (ML), Terrorist Financing (TF) and combatting serious crime more generally. Preventing and fighting ML and the financing of terrorism were top priorities of the European Agenda on Security, which might explain the fast developments regarding the regulation of Anti-Money Laundering (AML) and Counter Terrorism Financing (CTF). During the past years, the European Commission (Commission) proposed several legal texts to reform the current AML framework and to facilitate timely law enforcement (LE) access to financial data for the prevention, detection, investigation and prosecution of serious crime. The line between administrative sanctions and criminal law measures seems to become increasingly blurred, as the latest proposals are no longer based on an internal market provision, but on police and judicial cooperation legal bases. Financial Intelligence Units (FIUs) play a crucial role in analysing and exchanging information concerning suspicious transactions, serving as intermediaries between the private sector and Law Enforcement Authorities (LEAs). Because of the international nature of financial crime, cooperation between FIUs is of paramount importance. Yet, due to different organizational settings in the EU Member States, FIUs are not always able to exchange data effectively, which leads to information gaps. One of the reasons why the data exchange between FIUs is impeded are data protection rules that apply differently depending on the organizational structure of the FIUs in the 28 Member States. Whereas some FIUs must adhere to the stricter data protection rules under the General Data Protection Regulation (GDPR), others may exchange data more flexibly within the scope of the data protection Directive for police and criminal justice authorities (LED). Therefore, the counter-argument to granting broader LE-access rights to financial data by LEAs could be to enable a more effective exchange of data between FIUs. This article argues that FIUs should be able to process personal data within the scope of the LED, in order to have more flexibility to receive, analyse and exchange data: On the one hand, the LED provides sufficiently high data protection standards and adequate safeguards for data subjects while allowing FIUs to carry out their tasks effectively under harmonized rules. On the other hand, this would be an argument to strengthening the role of FIUs as neutral intermediaries instead of granting additional access to personal data by LEAs. [less ▲]

Detailed reference viewed: 40 (2 UL)
See detailKomparatistik als Praxis der Freiheit (Hans-Jost Frey, Werner Hamacher)
Kohns, Oliver UL

Scientific Conference (2019, January)

Detailed reference viewed: 33 (1 UL)
See detailIntroduction to Space Law
Masson-Zwaan, Tanja; Hofmann, Mahulena UL

Book published by Kluwer - revised (2019)

The expansion of space and communication activities requires an adaptation of the present international and national legal framework. The book gives an overview of legal norms applicable to space ... [more ▼]

The expansion of space and communication activities requires an adaptation of the present international and national legal framework. The book gives an overview of legal norms applicable to space activities. [less ▲]

Detailed reference viewed: 63 (5 UL)
Full Text
Peer Reviewed
See detailEffective Legal Remedies and Fair Trial in Tax and Time
Pantazatou, Aikaterini UL

in Haslehner, Werner; Kofler, Georg; Rust, Alexander (Eds.) Time and Tax - Issues in International, EU and Constitutional Law (2019)

Detailed reference viewed: 38 (3 UL)
Full Text
Peer Reviewed
See detailA preliminary assessment of the effects of migration on the production structure in Europe: A labor task approach
Joxhe, Majlinda UL; De Arcangelis, Giuseppe; Borelli, Stefania

in Economics Bulletin (2019), 39(1), 289-294

We assess the e ffect of migration on the production structure in a selection of European countries for the pre-Great Recession period 2001-2009. We propose a labor-task approach where the inflow of ... [more ▼]

We assess the e ffect of migration on the production structure in a selection of European countries for the pre-Great Recession period 2001-2009. We propose a labor-task approach where the inflow of migrants raises the relative supply of manual-physical (or simple) tasks and therefore favors simple-task intensive sectors. We use the US O*NET database in conjunction with European labor data to calculate the index of simple-task intensity at the industry and country level. The analysis confi rms that a rise in employment migration rates has a generalized positive impact, but that value-added increases signi ficantly more in sectors that use more intensively simple tasks. A traditional shift-share instrument is used to overcome possible endogeneity problems. [less ▲]

Detailed reference viewed: 12 (0 UL)
Full Text
See detailConformal actions of higher-rank lattices on pseudo-Riemannian manifolds
Pecastaing, Vincent UL

E-print/Working paper (2019)

We investigate conformal actions of cocompact lattices in higher-rank simple Lie groups on compact pseudo-Riemannian manifolds. Our main result gives a general bound on the real-rank of the lattice, which ... [more ▼]

We investigate conformal actions of cocompact lattices in higher-rank simple Lie groups on compact pseudo-Riemannian manifolds. Our main result gives a general bound on the real-rank of the lattice, which was already known for the action of the full Lie group ([33]). When the real-rank is maximal, we prove that the manifold is conformally flat. This indicates that a global conclusion similar to that of [1] and [17] in the case of a Lie group action might be obtained. We also give better estimates for actions of cocompact lattices in exceptional groups. Our work is strongly inspired by the recent breakthrough of Brown, Fisher and Hurtado on Zimmer’s conjecture [7]. [less ▲]

Detailed reference viewed: 30 (2 UL)
Full Text
Peer Reviewed
See detailArpanet (1969-2019)
Paloque-Bergès, Camille; Schafer, Valerie UL

in Internet Histories: Digital Technology, Culture and Society (2019), 3(1), 1-14

ARPANET’s story is part of the Internet’s official heritage, as a first crucial step in its development. Janet Abbate’s seminal work Inventing the Internet (1999) has extensively covered its history and ... [more ▼]

ARPANET’s story is part of the Internet’s official heritage, as a first crucial step in its development. Janet Abbate’s seminal work Inventing the Internet (1999) has extensively covered its history and is still a landmark in this area. However, the 50th anniversary of ARPANET provides an opportunity to reflect on existing histories and to open up the debate to new perspectives and approaches. If we consider ARPANET as a first step towards the Internet, how did it determine – and how does it continue to determine – our current understanding of the Internet? What is left to explore and discover in ARPANET’s history? And if ARPANET is dead today, are its legacy and spirit still alive, and if so, in what way? [less ▲]

Detailed reference viewed: 8 (1 UL)