Mehrsprachigkeit im universitären Kontext: Eine Analyse der Sprachenwahl einer Doktorandin in LuxemburgHu, Adelheid ; Hofmann, Stephanie ![]() in Cahiers internationaux de sociolinguistique (2019), No 16 Detailed reference viewed: 62 (2 UL) UC Priced Oblivious Transfer with Purchase Statistics and Dynamic PricingDamodaran, Aditya Shyam Shankar ; ; Rial, Alfredo ![]() in Progress in Cryptology – INDOCRYPT 2019 (2019, December) Priced oblivious transfer (POT) is a cryptographic protocol that can be used to protect customer privacy in e-commerce applications. Namely, it allows a buyer to purchase an item from a seller without ... [more ▼] Priced oblivious transfer (POT) is a cryptographic protocol that can be used to protect customer privacy in e-commerce applications. Namely, it allows a buyer to purchase an item from a seller without disclosing to the latter which item was purchased and at which price. Unfortunately, existing POT schemes have some drawbacks in terms of design and functionality. First, the design of existing POT schemes is not modular. Typically, a POT scheme extends a k-out-of-N oblivious transfer (OT) scheme by adding prices to the items. However, all POT schemes do not use OT as a black-box building block with certain security guarantees. Consequently, security of the OT scheme needs to be reanalyzed while proving security of the POT scheme, and it is not possible to swap the underlying OT scheme with any other OT scheme. Second, existing POT schemes do not allow the seller to obtain any kind of statistics about the buyer's purchases, which hinders customer and sales management. Moreover, the seller is not able to change the prices of items without restarting the protocol from scratch. We propose a POT scheme that addresses the aforementioned drawbacks. We prove the security of our POT in the UC framework. We modify a standard POT functionality to allow the seller to receive aggregate statistics about the buyer's purchases and to change prices dynamically. We present a modular construction for POT that realizes our functionality in the hybrid model. One of the building blocks is an ideal functionality for OT. Therefore, our protocol separates the tasks carried out by the underlying OT scheme from the additional tasks needed by a POT scheme. Thanks to that, our protocol is a good example of modular design and can be instantiated with any secure OT scheme as well as other building blocks without reanalyzing security from scratch. [less ▲] Detailed reference viewed: 155 (38 UL) Every quasitrivial n-ary semigroup is reducible to a semigroup; Devillet, Jimmy ![]() in Algebra Universalis (2019), 80(4), We show that every quasitrivial n-ary semigroup is reducible to a binary semigroup, and we provide necessary and sufficient conditions for such a reduction to be unique. These results are then refined in ... [more ▼] We show that every quasitrivial n-ary semigroup is reducible to a binary semigroup, and we provide necessary and sufficient conditions for such a reduction to be unique. These results are then refined in the case of symmetric n-ary semigroups. We also explicitly determine the sizes of these classes when the semigroups are defined on finite sets. As a byproduct of these enumerations, we obtain several new integer sequences. [less ▲] Detailed reference viewed: 278 (61 UL) Conference 'Supergeometry, Supersymmetry and Quantization'Bruce, Andrew ; Ibarguengoytia, Eduardo ; Poncin, Norbert ![]() Report (2019) Detailed reference viewed: 72 (12 UL) Luxemburg - Stadtentwicklung von den Anfängen bis zum Ende des MittelaltersUhrmacher, Martin ![]() in Uhrmacher, Martin; Kass, Steve; Pauli, Sebastian (Eds.) Luxatlas.lu - Ein digitaler und interaktiver historischer Stadtatlas Luxemburgs (2019) Kurzer Abriss der Stadtgeschichte Luxemburgs bis zum Ende des Mittelalters. Teil des digitalen und interaktiven Stadtatlas Luxemburgs: https://www.luxatlas.lu Detailed reference viewed: 47 (4 UL) Luxemburg - Stadtentwicklung von den Anfängen der Festung im 16. Jahrhundert bis zu ihrer Schleifung 1867Uhrmacher, Martin ![]() in Uhrmacher, Martin; Kass, Steve; Pauli, Sebastian (Eds.) Luxatlas.lu - Ein digitaler und interaktiver historischer Stadtatlas Luxemburgs (2019) Kurzer Abriss der Stadtgeschichte Luxemburgs von den Anfängen der Festung im 16. Jahrhundert bis zu ihrer Schleifung 1867. Teil des digitalen und interaktiven Stadtatlas Luxemburgs: https://www.luxatlas.lu Detailed reference viewed: 62 (7 UL) A Democratic Dénouement? The EU vs Terrorist Content Online | Um desfecho democrático? A União Europeia vs conteúdo terrorista onlineRobinson, Gavin ![]() in Publicum (2019), 5(2), 184-200 This paper explores the manifold aspects of the draft Terrorist Content Online (‘TCO’) Regulation which are of clear import for the democratic future of the internet insofar as they will reshape the ... [more ▼] This paper explores the manifold aspects of the draft Terrorist Content Online (‘TCO’) Regulation which are of clear import for the democratic future of the internet insofar as they will reshape the boundaries of what is acceptable behavior online and set out tools and procedures for deciding what must be (potentially, pre-emptively) excised from the exchanges taking place there. The piece places particular emphasis on the proposal’s ramifications for legal certainty and freedom of expression in cyberspace. In doing so, it aims to raise the most salient policy concerns, legal difficulties and technological quandaries which ripple out from the EU legislator’s laudable goal of tackling violent and terrorist content online. The article is structured as follows: after a discussion of the foundational concept of “terrorist content” which applies across the board in the draft text (II), we distinguish its headline provisions tightening up service providers’ compliance with orders to remove or disable access to terrorist content (III) from those aspects of the proposal which aim to responsibilise providers to act unassisted against terrorist content, including through the hotly-debated use of proactive measures (IV). A few concluding remarks on the future direction of this live file are offered to close (V). [less ▲] Detailed reference viewed: 26 (7 UL) Challenges in completing EMU: asymmetric competition vs fiscal harmonisation. A case study of the Benelux countriesDanescu, Elena ![]() in Journal of Contemporary European Research (2019) This paper aims to investigate the concept, context and socio-economic consequences of fiscal competition in the integrated economic space of EMU in completion, to pinpoint the positive and negative ... [more ▼] This paper aims to investigate the concept, context and socio-economic consequences of fiscal competition in the integrated economic space of EMU in completion, to pinpoint the positive and negative factors at work via a case study of the Benelux countries – both founder members of the EU and pioneers of EMU – and to examine the impact on European and international regulations in the field. In particular, it will endeavour to provide a comprehensive interpretation of fiscal policy in the Benelux countries via a comparative approach and from a historical perspective. It will look at the development of respective domestic fiscal policies, driven by national interests and by membership of a Community that is subject to requirements in terms of harmonisation and taxation, but also by constant contact (and frequent clashes) with the multilateral international environment. [less ▲] Detailed reference viewed: 185 (22 UL) Les nouvelles dispositions européennes en matière de mobilité transfrontalière : légitimation du retour à une certaine forme de protectionnisme ?Corbisier, Isabelle ![]() in Revue Pratique des Sociétés - Tijdschrift voor Rechtspersoon en Vennootschap (2019) Detailed reference viewed: 66 (9 UL) Stadtentwicklung 1867-1963Pauly, Michel ![]() in Uhrmacher, Martin; Kass, Steve; Pauli, Sebastian (Eds.) Luxatlas.lu - Ein digitaler und interaktiver historischer Stadtatlas Luxemburgs (2019) Kurzer Abriss der Stadtgeschichte Luxemburgs von 1867 bis 1963. Teil des digitalen und interaktiven Stadtatlas Luxemburgs: https://www.luxatlas.lu Detailed reference viewed: 20 (2 UL) Luxatlas.lu - Ein digitaler und interaktiver historischer Stadtatlas LuxemburgsUhrmacher, Martin ; Kass, Steve ; Book published by University of Luxembourg (2019) Seit Ende 2016 widmet sich das universitäre Forschungsprojekt VILLUX X in Zusammenarbeit mit der Stadt Luxemburg der Erstellung eines digitalen historischen Atlas. Dieser zeigt die städtische Entwicklung ... [more ▼] Seit Ende 2016 widmet sich das universitäre Forschungsprojekt VILLUX X in Zusammenarbeit mit der Stadt Luxemburg der Erstellung eines digitalen historischen Atlas. Dieser zeigt die städtische Entwicklung Luxemburgs seit Beginn des 19. Jahrhunderts in Form von digitalen und interaktiven Karten. In mehreren Zeitschnitten ab den 1820er Jahren lassen sich die tiefgreifenden Wandlungsprozesse der Stadt und ihr Wachstum interaktiv nachvollziehen: Von der engen Festungsstadt des frühen 19. Jahrhunderts bis zur großflächigen, internationalen Metropole des 21. Jahrhunderts. Die Stadtentwicklung ist für diesen Zeitraum in vielen Bereichen noch immer wenig erforscht. Das überrascht, denn Luxemburg hat im Vergleich zu anderen europäischen Städten in den letzten 200 Jahren besonders tiefgreifende Veränderungsprozesse durchlaufen: Von einer mittelgroßen Festungsstadt der frühen Neuzeit, die sich erst nach 1867 von ihrem einengenden Militärkorsett befreien konnte, bis hin zu einer modernen europäischen Hauptstadt des frühen 20. Jahrhunderts. Dann, in der Nachkriegszeit, wurde die Stadt zu einem der drei Hauptverwaltungssitze der Europäischen Union. Und ab den 1970er Jahren entwickelte sie sich darüber hinaus zu einem internationalen Finanzzentrum. Heute ist Luxemburg zweifellos die wirtschaftlich, politisch und kulturell bedeutendste Stadt der Großregion mit einem ausgeprägten kosmopolitischen Flair. Ziel des Luxatlas-Projekts ist es, die Voraussetzungen und Merkmale dieser Entwicklung sowie die wirtschaftlichen, sozialen und politischen Rahmenbedingungen nachzuzeichnen und zu analysieren. Es sind vor allem raumbezogene Fragstellungen, die dabei in historischer Perspektive mit dem digitalen und interaktiven Stadtatlas in den Blick genommen werden. Der Atlas lässt sich in diesem Sinne definieren als eine Sammlung von Karten, Bildern und erläuternden Texten. Er bündelt und verknüpft relevante Daten von städtischen und nationalen Behörden und Kultureinrichtungen sowie auch von unterschiedlichen Forschungsdisziplinen wie Geschichte und Geographie und stellt diese in überarbeiteter Form den Nutzern zur Verfügung. Luxatlas.lu ermöglicht es, historische Veränderungsprozesse des 19. und 20. Jahrhunderts diachron zu dokumentieren und gleichzeitig traditionelle Entwicklungsvorstellungen in Frage stellen. Zugleich etabliert er neue Methoden und Konzepte zur Standardisierung von Online-Karten und wird somit selbst zu einem Instrument zusätzlichen Erkenntnisgewinns für seine Nutzer. [less ▲] Detailed reference viewed: 58 (19 UL) Alzheimer’s disease-associated (hydroxy)methylomic changes in the brain and blooddel Sol Mesa, Antonio ![]() in Clinical Epigenetics (2019) Detailed reference viewed: 62 (9 UL) Gamification of psychological tests: three lessons learnedSonnleitner, Philipp ![]() in Testing International (2019), 42 Detailed reference viewed: 52 (8 UL) EU-ASEAN High Performance Computing (HPC) Study Expert Mapping of ASEAN policy orientations and related HPC research infrastructuresVarrette, Sébastien ; Report (2019) Detailed reference viewed: 89 (3 UL) Distance-based vertex identification in graphs: The outer multiset dimension; Ramirez Cruz, Yunior ; et alin Applied Mathematics and Computation (2019), 363 Detailed reference viewed: 90 (5 UL) Perceptions of Inclusion. Selbst- und Fremdeinschätzung von Schülerinnen und Schülern mit Bedarf an sonderpädagogischer Unterstützung im Bereich Körperliche und motorische Entwicklung im Übergang von der Primar- in die SekundarstufeStöcker, Anne ; ; Zurbriggen, Carmen ![]() in Zeitschrift für Heilpädagogik (2019), 70(12), 623-637 Detailed reference viewed: 43 (0 UL) Towards a complexity turn in border studies? Rückblicke und AusblickeWille, Christian ![]() Presentation (2019, December) Detailed reference viewed: 140 (1 UL) On the Formal Structure of Rules in Conflict of LawsMarkovich, Réka ![]() in Legal Knowledge and Information Systems 2019 (proceedings) (2019, December) Law has different methods and principles to resolve conflicts between norms, most of these come from Roman Law, they are well-known and much discussed. There is a whole branch of law, though, which is ... [more ▼] Law has different methods and principles to resolve conflicts between norms, most of these come from Roman Law, they are well-known and much discussed. There is a whole branch of law, though, which is much less discussed while having been created exactly in order to resolve special conflicts: conflict of laws. This system within Private International Law is dedicated to providing metarules in legal situations where more than one national legal systems’ rules could be applied: CoL rules indirectly settle the situation by declaring which one’s should. The formal representation of how these rules work contributes not only to the modelling of this branch of law but also provides methodologies for concerns arising from other conflicting normative systems, such as ethically sensitive situations where there are multiple stakeholders with different moral backgrounds. [less ▲] Detailed reference viewed: 109 (9 UL) Temporal 3D Human Pose Estimation for Action Recognition from Arbitrary Viewpoints; Baptista, Renato ; Al Ismaeil, Kassem et alin 6th Annual Conf. on Computational Science & Computational Intelligence, Las Vegas 5-7 December 2019 (2019, December) This work presents a new view-invariant action recognition system that is able to classify human actions by using a single RGB camera, including challenging camera viewpoints. Understanding actions from ... [more ▼] This work presents a new view-invariant action recognition system that is able to classify human actions by using a single RGB camera, including challenging camera viewpoints. Understanding actions from different viewpoints remains an extremely challenging problem, due to depth ambiguities, occlusion, and a large variety of appearances and scenes. Moreover, using only the information from the 2D perspective gives different interpretations for the same action seen from different viewpoints. Our system operates in two subsequent stages. The first stage estimates the 2D human pose using a convolution neural network. In the next stage, the 2D human poses are lifted to 3D human poses, using a temporal convolution neural network that enforces the temporal coherence over the estimated 3D poses. The estimated 3D poses from different viewpoints are then aligned to the same camera reference frame. Finally, we propose to use a temporal convolution network-based classifier for cross-view action recognition. Our results show that we can achieve state of art view-invariant action recognition accuracy even for the challenging viewpoints by only using RGB videos, without pre-training on synthetic or motion capture data. [less ▲] Detailed reference viewed: 266 (10 UL) Machine learning for physical-layer security: Attacks and SLP Countermeasures for Multiantenna Downlink SystemsMayouche, Abderrahmane ; ; Tsinos, Christos et alScientific Conference (2019, December) Most physical-layer security (PLS) work employ information theoretic metrics for performance analysis. In this paper, however, we investigate PLS from a signal processing point of view, where we rely on ... [more ▼] Most physical-layer security (PLS) work employ information theoretic metrics for performance analysis. In this paper, however, we investigate PLS from a signal processing point of view, where we rely on bit-error rate (BER) at the eavesdropper (Eve) as a metric for information leakage. Meanwhile, recently, symbol-level precoding (SLP) has been shown to provide PLS gains as a new way for security. However, in this work, we introduce a machine learning (ML) based attack, where we show that even SLP schemes can be vulnerable to such attacks. Namely, this attack manifests when an eavesdropper (Eve) utilizes ML in order to learn the precoding pattern when precoded pilots are sent. With this ability, an Eve can decode data with favorable accuracy. As a countermeasure to this attack, we propose a novel precoding design. The proposed countermeasure yields high BER at the Eve, which makes symbol detection practically infeasible for the latter, thus providing physical-layer security between the base station (BS) and the users. In the numerical results, we validate both the attack and the countermeasure, and show that this gain in security can be achieved at the expense of only a small additional power consumption at the transmitter. [less ▲] Detailed reference viewed: 124 (12 UL) |
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