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See detailPer-antenna Power Minimization in Symbol-level Precoding for the Multi-beam Satellite Downlink
Spano, Danilo UL; Chatzinotas, Symeon UL; Andrenacci, Stefano UL et al

in International Journal of Satellite Communications and Networking (2018)

This paper addresses the problem of multi-user interference in the forward downlink channel of a multi-beam satellite system. A symbol-level precoding scheme is considered, in order to exploit the multi ... [more ▼]

This paper addresses the problem of multi-user interference in the forward downlink channel of a multi-beam satellite system. A symbol-level precoding scheme is considered, in order to exploit the multi-user interference and transform it into useful power at the receiver side, through a joint utilization of the data information and the channel state information. In this context, a per-antenna power minimization scheme is proposed, under Quality-of-Service constraints, for multi-level modulation schemes. The consideration of the power limitations individually for each transmitting RF chain is a central aspect of this work, and it allows to deal with systems using separate per-antenna amplifiers. Moreover, this feature is also particularly relevant for systems suffering non-linear effects of the channel. This is the case of satellite systems, where the non-linear amplifiers should be properly driven in order to reduce the detrimental saturation effect. In the proposed scheme, the transmitted signals are designed in order to reduce the power peaks, while guaranteeing some specific target signal-to-noise ratios at the receivers. Numerical results are presented in order to show the effectiveness of the proposed scheme, which is compared both to the state of the art in symbol-level precoding and to the conventional MMSE precoding approach. [less ▲]

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See detailLaurent Menager. Lux Aeterna. Lateinische Chorsätze
Sagrillo, Damien UL

Book published by Merseburger (2018)

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See detailEuropa:Quo Vadis?
Danescu, Elena UL

in The Journal of European Economic History (2018)

The past few years have been a bleak period for Europe, dominated by the effects of a multidimensional systemic crisis (economic, financial, social, environmental and geopolitical), growing unease among ... [more ▼]

The past few years have been a bleak period for Europe, dominated by the effects of a multidimensional systemic crisis (economic, financial, social, environmental and geopolitical), growing unease among the general public and considerable turmoil among political elites. The aggressive rise of populism, the slow slide towards authoritarianism and the surge in nationalism have led to parochial tendencies, an erosion of solidarity and a growing ambivalence about the future of the shared European project. At the same time, in today’s globalised environment, the limits of the traditional economic model have become apparent as it grapples with the effects of “secular stagnation". A new paradigm is emerging, based on the importance of global public goods, of what is “common” to humanity, despite the divisions that seem to be driving it apart. [less ▲]

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See detailOffshore
Hesse, Markus UL

in Local Environment (2018)

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See detailImpact of inspection on public opinion (invited symposium contribution)
Fischbach, Antoine UL

Scientific Conference (2018, March)

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See detailProfiling Energy Efficiency of Mobile Crowdsensing Data Collection Frameworks for Smart City Applications
Tomasoni, Mattia; Capponi, Andrea UL; Fiandrino, Claudio UL et al

in The 6th IEEE International Conference on Mobile Cloud Computing, Services, and Engineering (IEEE Mobile Cloud 2018) (2018, March)

Mobile crowdsensing (MCS) has emerged in the last years and has become one of the most prominent paradigms for urban sensing. In MCS, citizens actively participate in the sensing process by contributing ... [more ▼]

Mobile crowdsensing (MCS) has emerged in the last years and has become one of the most prominent paradigms for urban sensing. In MCS, citizens actively participate in the sensing process by contributing data with their smartphones, tablets, wearables and other mobile devices to a collector. As citizens sustain costs while contributing data, i.e., the energy spent from the batteries for sensing and reporting, devising energy efficient data collection frameworks (DCFs) is essential. In this work, we compare the energy efficiency of several DCFs through CrowdSenSim, which allows to perform large-scale simulation experiments in realistic urban environments. Specifically, the DCFs under analysis differ one with each other by the data reporting mechanism implemented and the signaling between users and the collector needed for sensing and reporting decisions. Results reveal that the key criterion differentiating DCFs' energy consumption is the data reporting mechanism. In principle, continuous reporting to the collector should be more energy consuming than probabilistic reporting. However, DCFs with continuous reporting that implement mechanisms to block sensing and data delivery after a certain amount of contribution are more effective in harvesting data from the crowd. [less ▲]

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See detailUrban Policy in the Time of Obama
Hesse, Markus UL

in DISP Dokumente und Informationen zur Schweizerischen Orts-, Regional- und Landesplanung (2018), 54(212/1), 76

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See detailConnecting Personal Data of Third Country Nationals: Interoperability of EU Databases in the Light of the CJEU's Case Law on Data Retention
Quintel, Teresa Alegra UL

E-print/Working paper (2018)

On 12 December 2017, the EU Commission presented a proposal on the interoperability of EU large-scale Information Systems. The proposal seeks to enable all centralised EU databases for security, border ... [more ▼]

On 12 December 2017, the EU Commission presented a proposal on the interoperability of EU large-scale Information Systems. The proposal seeks to enable all centralised EU databases for security, border and migration management to be interconnected by 2020. The underlying IT systems retain data of Third Country Nationals (TCNs), namely travellers, applicants for international protection, information relating to visa applications or data on missing persons and criminals. With the proposal, the Commission seeks to create new possibilities to exchange information, manage migration challenges and to enhance the Union’s internal security. The interconnectivity of databases would introduce fundamental changes to the current structure of EU IT-systems and requires careful consideration and assessment of compliance with EU data protection standards. This also means that access to information in an interoperable system must be strictly aligned to the access rights of the underlying databases and that requesting authorities only obtain the data that they are authorized to access. With interoperability, data once held in silos would be retained in three new centralized databases and would be more easily accessible, also for the prevention, investigation and prosecution of crime. Where criminal investigations previously required multiple searches in separate databases, this cascading safeguard shall progressively be abandoned to streamline access to personal data by law enforcement authorities. Despite simplified access conditions, this would require new types of processing operations for which the interoperability proposal does not provide a legal basis. During recent years, several judgments of the Court of Justice of the European Union (CJEU) have highlighted the difficulty of striking a proper balance between the fundamental rights to privacy and data protection, enshrined in Article 7 and 8 of the Charter of Fundamental Rights of the European Union (EU Charter) with an increased demand for security and the surveillance of potential criminals. The Court repeatedly pointed out the need to strike a fair balance between these (allegedly) competing interests and emphasised that law enforcement authorities should not be granted access to personal data without prior authorization. Using the CJEU’s judgments as vehicle and considering the assumption that TCNs risk to become subject to data retention measures in a disproportionate manner, the following analysis seeks to assess both existing EU databases and their foreseen interoperability against the requirements established by the Court in order to evaluate their (in)-compatibility with the fundamental rights standards enshrined in the EU Charter. [less ▲]

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See detailNetzWerk: Die Bedeutung der Sozialen Arbeit für die luxemburgische Gesellschaft
Böwen, Petra UL

Report (2018)

"NetzWerk- Wëssenschaft trëfft Praxis, Politik an Ëffentlechkeet" ist eine regelmäßig erscheinende Publikation und dokumentiert die vielfältigen Angebote des PraxisBüros. Das PraxisBüro bietet allen ... [more ▼]

"NetzWerk- Wëssenschaft trëfft Praxis, Politik an Ëffentlechkeet" ist eine regelmäßig erscheinende Publikation und dokumentiert die vielfältigen Angebote des PraxisBüros. Das PraxisBüro bietet allen Akteuren der Sozialen Arbeit Vernetzung, Plattformen, Veranstaltungen, Informationen aus Luxemburg und der Großregion. Das Schwerpunktthema dieser Ausgabe: "Die Bedeutung der Sozialen Arbeit für die luxemburgische Gesellschaft- Stand der Dinge, Herausforderungen, Perspektiven" fußt auf dem 5. Praxis- und Kontakttag 2017. Es werden u.a. Ergebnisse der Arbeitsmarktbeobachtung in den Feldern der Sozialen Arbeit und Diskussionen mit Akteuren aus Wissenschaft, Praxis und Politik zur Thematik dargestellt. [less ▲]

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See detailSmall State, Great Diplomacy: The Role of Luxembourg in the European Integration Process
Danescu, Elena UL

Scientific Conference (2018, March)

Luxembourg has a particular geopolitical and historical situation — a small, multicultural and multilingual nation sandwiched between two larger powers, France and Germany, with no central bank or ... [more ▼]

Luxembourg has a particular geopolitical and historical situation — a small, multicultural and multilingual nation sandwiched between two larger powers, France and Germany, with no central bank or national currency. For Luxembourg, adopting an outward orientation had always been a sine qua non. After the second world war the political leaders were convinced of the need to preserve national sovereignty and vital interests by maintaining an international outlook. The European principle of equality among states also guaranteed Luxembourg a role in decision-making and in the leadership of joint organizations. By giving up part of its sovereignty Luxembourg paradoxically actually strengthened its sovereignty. Since then, Luxembourg has played and continues to act as a mediator and a force for ideas at the heart of EU, either as a member State or through some of its leaders. Since the time of Joseph Bech, from Pierre Werner and Gaston Thorn to Jacques Santer and Jean-Claude Juncker more recently, Luxembourg has proved itself to be a master in the art of political consensus and a rich source of leaders who have been able to find a way out of Europe’s successive impasses (among them: the ‘battle of the seats’ of the Community institutions, UK accession, BLEU, Benelux). The influential nature of its leadership gave Luxembourg a role in the European integration process that far outweighed the country’s socio-economic impact [less ▲]

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See detailThe policy narratives of European capital markets union
Howarth, David UL; Quaglia, Lucia

in Journal of European Public Policy (2018), 25(7), 990-1009

This paper examines the ‘making’ of Capital Markets Union (CMU) through the theoretical lens of ‘actor-centred constructivism’, by considering the ‘policy narratives’ that bureaucratic actors have ... [more ▼]

This paper examines the ‘making’ of Capital Markets Union (CMU) through the theoretical lens of ‘actor-centred constructivism’, by considering the ‘policy narratives’ that bureaucratic actors have employed strategically to promote the project. It is argued that two main narratives were articulated by the European Commission in order to mobilize the political support necessary to push forward CMU and reduce potential opposition to it. The first narrative was to boost the size and internal and external competitiveness of European Union capital markets. The second narrative was the increased funding to the real economy, especially to small and medium-sized enterprises (SMEs) and infrastructural projects. The Commission used these narratives instrumentally in ‘framing’ CMU as a positive-sum game, rather than a zero-sum game with potential winners and losers. [less ▲]

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See detailPrinciples, Values and Challenges for a Europe Built through Currency
Danescu, Elena UL

Scientific Conference (2018, March)

At the Hague Summit (1–2 December 1969), the decision was taken to explore the possibilities of progress towards an economic and monetary union. An ad hoc committee of experts was set up and, at the ... [more ▼]

At the Hague Summit (1–2 December 1969), the decision was taken to explore the possibilities of progress towards an economic and monetary union. An ad hoc committee of experts was set up and, at the request of the EC Council, Pierre Werner (Prime Minister and Finance Minister of Luxembourg) was chosen as chairman. The work of this committee began on 20 March 1970 and resulted in the Werner Report - presented on 8 October in Luxembourg. The Werner Report offered a full definition of EMU, which was to be established in three stages over a decade (1971–80). The ultimate aim was to achieve irreversible convertibility between the currencies of the Member States, the complete liberalization of capital movements, the irrevocable fixing of exchange rates, and even potentially the replacement of national currencies by a single currency as a natural and desirable further development of monetary union. From an institutional viewpoint, the report called for the creation of two new steering bodies: a ‘centre of decision for economic policy’, independent of governments and placed under the democratic control of the European Parliament, to be elected by universal suffrage; and a ‘Community system for the central banks’. Also, EMU would serve as a ‘leaven’ for the development of a political union. Two main principles underpinned the Werner Report: gradual realization of EMU (a step-by-step approach); and parallelism between economic convergence and transfer of powers to the supranational level. The Report ran into a series of international crises (which led to the collapse of the IMS), culminating to its de facto suspension in 1974. Three decades later, the Delors Report was to give the Werner Report the credit due to it, by appropriating its overall philosophy and structure. Both reports define monetary union in almost identical terms, but in some respects the Werner Report goes further and is more clear cut than the Delors Report. This paper aims to analyze why the Werner Report marked a crucial stage in the process of European integration and was offered, through its principles, values and ideas, a blueprint of EMU in the EU. [less ▲]

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See detailDelaunay Triangulations of Points on Circles
despré, vincent; devillers, olivier; Parlier, Hugo UL et al

E-print/Working paper (2018)

Delaunay triangulations of a point set in the Euclidean plane are ubiquitous in a number of computational sciences, including computational geometry. Delaunay triangulations are not well defined as soon ... [more ▼]

Delaunay triangulations of a point set in the Euclidean plane are ubiquitous in a number of computational sciences, including computational geometry. Delaunay triangulations are not well defined as soon as 4 or more points are concyclic but since it is not a generic situation, this difficulty is usually handled by using a (symbolic or explicit) perturbation. As an alternative, we propose to define a canonical triangulation for a set of concyclic points by using a max-min angle characterization of Delaunay triangulations. This point of view leads to a well defined and unique triangulation as long as there are no symmetric quadruples of points. This unique triangulation can be computed in quasi-linear time by a very simple algorithm. [less ▲]

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See detailTaking stock of the European Grouping of Territorial Cooperation (EGTC): from policy formulation to policy implementation
Evrard, Estelle UL; Engl, Alice

in Medeiros, Eduardo (Ed.) European Territorial Cooperation : Theoretical and Empirical Approaches to the Process and Impacts of Cross-Border and Transnational Cooperation in Europe (2018)

The European Grouping of Territorial Cooperation (EGTC) has become a central tool for (sub-) state authorities to organise territorial cooperation in the EU. To take stock of this rapid change, the ... [more ▼]

The European Grouping of Territorial Cooperation (EGTC) has become a central tool for (sub-) state authorities to organise territorial cooperation in the EU. To take stock of this rapid change, the present chapter suggests an analytical framework in two steps. Firstly, the EGTC instrument is symptomatic of a turn in how the European territorial cohesion policy relates to (sub-) state territorial cooperation (policy formulation). Before the publication of the EGTC regulation in 2006, the EU support for territorial cooperation was mainly financial (e.g. INTERREG) and regulatory (e.g. consolidation of the single market). No specific legal framework was provided. The contribution investigates this progressive turn in the cohesion policy. Secondly, the EGTC represents a tool for implementing territorial cooperation (policy implementation). The number of EGTCs created over about a decade demonstrates that this instrument fills a gap in the legislative framework of territorial cooperation. Our comparative assessment of the use of the tool reveals a dominant implementation pattern. Most of the existing EGTCs are territorially bound organisations, set-up on adjacent borders by local and regional authorities, a minority being interregional or transregional. Although they mostly have collective action resources and instruments and have identifiable objectives shared by their respective members, they follow a rather traditional pattern of cooperation where each individual member’s core activities primarily relate to a (sub-) state authority and where the EGTC acts primarily as an agent relying on its members. [less ▲]

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See detailSecretion of the Phosphorylated Form of S100A9 from Neutrophils Is Essential for the Proinflammatory Functions of Extracellular S100A8/A9.
Schenten, Veronique; Plancon, Sebastien; Jung, Nicolas UL et al

in Frontiers in immunology (2018), 9

S100A8 and S100A9 are members of the S100 family of cytoplasmic EF-hand Ca(2+)-binding proteins and are abundantly expressed in the cytosol of neutrophils. In addition to their intracellular roles, S100A8 ... [more ▼]

S100A8 and S100A9 are members of the S100 family of cytoplasmic EF-hand Ca(2+)-binding proteins and are abundantly expressed in the cytosol of neutrophils. In addition to their intracellular roles, S100A8/A9 can be secreted in the extracellular environment and are considered as alarmins able to amplify the inflammatory response. The intracellular activity of S100A8/A9 was shown to be regulated by S100A9 phosphorylation, but the importance of this phosphorylation on the extracellular activity of S100A8/A9 has not yet been extensively studied. Our work focuses on the impact of the phosphorylation state of secreted S100A9 on the proinflammatory function of neutrophils. In a first step, we characterized the secretion of S100A8/A9 in different stimulatory conditions and investigated the phosphorylation state of secreted S100A9. Our results on neutrophil-like differentiated HL-60 (dHL-60) cells and purified human neutrophils showed a time-dependent secretion of S100A8/A9 when induced by phorbol 12-myristoyl 13-acetate and this secreted S100A9 was found in a phosphorylated form. Second, we evaluated the impact of this phosphorylation on proinflammatory cytokine expression and secretion in dHL-60 cells. Time course experiments with purified unphosphorylated or phosphorylated S100A8/A9 were performed and the expression and secretion levels of interleukin (IL)-1alpha, IL-1beta, IL-6, tumor necrosis factor alpha, CCL2, CCL3, CCL4, and CXCL8 were measured by real-time PCR and cytometry bead array, respectively. Our results demonstrate that only the phosphorylated form of the complex induces proinflammatory cytokine expression and secretion. For the first time, we provide evidence that S100A8/PhosphoS100A9 is inducing cytokine secretion through toll-like receptor 4 signaling. [less ▲]

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See detailDerivations and differential operators on rings and fields
Kiss, Gergely UL

in Annales Universitatis Scientiarum Budapestinensis de Rolando Eötvös Nominatae. Sectio Computatorica (2018)

Let R be an integral domain of characteristic zero. We prove that a function D : R → R is a derivation of order n if and only if D belongs to the closure of the set of differential operators of degree n ... [more ▼]

Let R be an integral domain of characteristic zero. We prove that a function D : R → R is a derivation of order n if and only if D belongs to the closure of the set of differential operators of degree n in the product topology of R^R, where the image space is endowed with the discrete topology. In other words, f is a derivation of order n if and only if, for every finite set F ⊂ R, there is a differential operator D of degree n such that f = D on F. We also prove that if d1, . . . , dn are nonzero derivations on R, then d1 ◦ . . . ◦ dn is a derivation of exact order n. [less ▲]

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See detailA Simple Engineering Soil Surface Vibration Prediction Method
Macijauskas, Darius UL; Van Baars, Stefan UL

in Civil Engineering Research Journal (2018), 4(2),

In urban areas where the infrastructure is dense and construction of new structures is near existing and sensitive buildings, frequently vibrations, caused by human activities, occur. Generated waves in ... [more ▼]

In urban areas where the infrastructure is dense and construction of new structures is near existing and sensitive buildings, frequently vibrations, caused by human activities, occur. Generated waves in the soil may adversely affect surrounding buildings. These vibrations have to be predicted a priori by using currently available knowledge of the soil dynamics. In order to make a good prediction of the soil surface vibration, it is necessary to perform calculations with a Finite Element Method (FEM). The disadvantages of the FEM are that this requires a special software package and a long time for the modelling and calculations. Therefore, it would be very useful to derive a simple model for engineering purposes, which could be used to predict geotechnical vibrations close to the source, without the need of special software and long calculations. Such a method is proposed in this article. This method is validated by a vibration test performed on a peaty site in the Netherlands. The predictions made with this method, have been compared with both the field measurements and the FEM calculations. The comparison proves that by using the presented vibration prediction method, the vibrations can be predicted as accurate as with the FEM. [less ▲]

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See detailEU 'Horizontal' Report
Ligeti, Katalin UL; Marletta, Angelo UL

in Vervaele, John; Simonato, Michele; Luchtman, Michiel (Eds.) Exchange of information with EU and national enforcement authorities. Improving OLAF legislative framework through a comparison with other EU authorities (ECN/ESMA/ECB) (2018)

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See detailFunds and EU Tax Directives
Pantazatou, Aikaterini UL

in Haslehner, Werner (Ed.) Investment Fund Taxation (2018)

Detailed reference viewed: 35 (2 UL)