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See detailSiedlungsentwicklung und Wohnungswesen
Becker, Tom UL; Hesse, Markus UL

in Schronen, Danielle; Urbé, Robert (Eds.) Nachhaltiges Wohnen (2012)

Detailed reference viewed: 112 (3 UL)
See detailSiedlungsentwicklung und Wohnungswesen
Becker, Tom UL; Hesse, Markus UL

in Chilla, Tobias; Schulz, Christian (Eds.) Raumplanung in Luxemburg - Aménagement du Territoire au Luxembourg (2011)

Detailed reference viewed: 152 (5 UL)
See detailLe siège de la BGL - une banque et son architecture​ ​
Mouton, Victoria UL; Duval, Cécile UL; Gabellini, Marco UL

Presentation (2021, November 16)

L'histoire architecturale du siège de la Banque Générale du Luxembourg (BGL), est intimement liée à l’histoire urbanistique de la ville de Luxembourg. Le choix du quartier, du boulevard ou de la rue dans ... [more ▼]

L'histoire architecturale du siège de la Banque Générale du Luxembourg (BGL), est intimement liée à l’histoire urbanistique de la ville de Luxembourg. Le choix du quartier, du boulevard ou de la rue dans lequel la Banque va s'implanter a toute sa signification et n’est pas dû au hasard. Les choix architecturaux, l’emplacement d’un siège deviennent-ils alors des éléments qui contribuent à façonner l'identité d'une banque ? Ou est-ce que les mutations urbaines et les évolutions du secteur bancaire influencent-elles le style de la construction ? Tout au long de son histoire, depuis ses débuts en 1919 jusqu’à nos jours, les bâtiments du siège de la BGL situés dans le centre-ville et au Kirchberg ont connu plusieurs vies pour rester compétitifs dans un monde bancaire qui se crée et se cherche. Concomitant à l’émergence de la place financière dans le paysage urbain luxembourgeois, la Banque a dû aussi continuellement se réinventer. À travers un siècle riche en événements, le narratif que les dirigeants de la Banque ont souhaité véhiculer à travers la dimension architecturale du siège a donc aussi évolué. Il fallait bien évidemment se démarquer de la concurrence, des autres institutions financières établies dans des bâtisses plus ou moins prestigieuses. Les multiples mutations architecturales du siège, qu’il s’agisse d’agrandissements, de transformations ou de reconstructions, en témoignent. [less ▲]

Detailed reference viewed: 45 (3 UL)
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See detailLe siège social en droit luxembourgeois des sociétés
Conac, Pierre-Henri UL

in Journal des Tribunaux Luxembourg (2009), (1), 2-2

Detailed reference viewed: 305 (8 UL)
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See detailDie Siegfried-Figur der Nibelungenüberlieferung in interkultureller Perspektive
Sieburg, Heinz UL

in Cornejo, Renata; Schiewer, Gesine Lenore; Weinberg, Manfred (Eds.) Konzepte der Interkulturalität in der Germanistik weltweit (2020)

Siegfried, the hero of the Middle High German »Nibelungenlied«, is not only interesting as a figure from the perspective of a German-national myth formation. This article aims to show that Siegfried is ... [more ▼]

Siegfried, the hero of the Middle High German »Nibelungenlied«, is not only interesting as a figure from the perspective of a German-national myth formation. This article aims to show that Siegfried is also important from the perspective of ›intercultural medieval studies‹. Therefore, the Siegfried figure in the Nibelungenlied is determined by cultural hybridity. His Scandinavian counterpart, Sigurd, is no less revealing as a cultural mediator. [less ▲]

Detailed reference viewed: 106 (3 UL)
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See detailSieving publishing communities in DBLP
Schommer, Christoph UL

in Proceedings "Third IEEE International Conference on Digital Information Management (ICDIM)" (2008)

Detailed reference viewed: 91 (6 UL)
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See detailSigHotSpotter: scRNA-seq-based computational tool to control cell subpopulation phenotypes for cellular rejuvenation strategies.
Ravichandran, Srikanth UL; Hartmann, Andras UL; Del Sol, Antonio

in Bioinformatics (2019)

SUMMARY: Single-cell RNA-sequencing is increasingly employed to characterize disease or ageing cell subpopulation phenotypes. Despite exponential increase in data generation, systematic identification of ... [more ▼]

SUMMARY: Single-cell RNA-sequencing is increasingly employed to characterize disease or ageing cell subpopulation phenotypes. Despite exponential increase in data generation, systematic identification of key regulatory factors for controlling cellular phenotype to enable cell rejuvenation in disease or ageing remains a challenge. Here, we present SigHotSpotter, a computational tool to predict hotspots of signaling pathways responsible for the stable maintenance of cell subpopulation phenotypes, by integrating signaling and transcriptional networks. Targeted perturbation of these signaling hotspots can enable precise control of cell subpopulation phenotypes. SigHotSpotter correctly predicts the signaling hotspots with known experimental validations in different cellular systems. The tool is simple, user-friendly and is available as web-server or as stand-alone software. We believe SigHotSpotter will serve as a general purpose tool for the systematic prediction of signaling hotspots based on single-cell RNA-seq data, and potentiate novel cell rejuvenation strategies in the context of disease and ageing. AVAILABILITY AND IMPLEMENTATION: SigHotSpotter is at https://SigHotSpotter.lcsb.uni.lu as a web tool. Source code, example datasets and other information are available at https://gitlab.com/srikanth.ravichandran/sighotspotter. SUPPLEMENTARY INFORMATION: Supplementary data are available at Bioinformatics online. [less ▲]

Detailed reference viewed: 66 (2 UL)
See detailSigismund und Europa. Einleitung
Pauly, Michel UL

in Pauly, Michel; Reinert, Frank (Eds.) Sigismund von Luxemburg. Ein Kaiser in Europa. Tagungsband des internationalen historischen und kunsthistorischen Kongresses in Luxemburg (2006)

Detailed reference viewed: 59 (0 UL)
See detailSigismund von Luxemburg, König von Ungarn und Kaiser, 1387-1437, 08.06.2005 – 10.06.2005 Luxemburg
Uhrmacher, Martin UL

in H-Soz-Kult: Kommunikation und Fachinformation für die Geschichtswissenschaften (2005)

Vom 8. bis 10. Juni fand in Luxemburg eine internationale Tagung statt zum Thema Sigismund von Luxemburg, König von Ungarn und Kaiser, 1387-1437. Der Kongress stand im Vorfeld der von Ungarn und Luxemburg ... [more ▼]

Vom 8. bis 10. Juni fand in Luxemburg eine internationale Tagung statt zum Thema Sigismund von Luxemburg, König von Ungarn und Kaiser, 1387-1437. Der Kongress stand im Vorfeld der von Ungarn und Luxemburg gemeinsam organisierten Ausstellung SIGISMUNDUS REX ET IMPERATOR. 1387-1437, die im nächsten Jahr in Budapest eröffnet wird (15. März - 18. Juni 2006) und anschließend nach Luxemburg kommt (13. Juli - 15. Oktober 2006). Er diente somit der wissenschaftlichen Standortbestimmung und der Diskussion des aktuellen Forschungsstandes zur Herrschaft Sigismunds von Luxemburg, König von Ungarn (1387), König (1410/11) und Kaiser (1433) des Heiligen Römischen Reiches, die von bedeutenden historischen und intellektuellen Umwälzungen geprägt war. Im Zentrum des Interesses standen weniger bekannte Aspekte der Persönlichkeit und des Wirkens von Sigismund sowie des Kunstschaffens seiner Zeit Die Referate behandelten dabei den Raum über Sigismunds Herrschaftsbereiche und das Heilige Römische Reich hinaus, er reichte vom skandinavisch-baltischen Raum über England, Frankreich, Burgund, die Eidgenossenschaft, Italien, Polen und den Balkan bis zum aufstrebenden Osmanischen Reich. Dieser große Wirkungsbereich Sigismunds spiegelte sich auch in der Referentenliste, die neben Teilnehmern aus Deutschland und Ungarn auch Referenten aus Tschechien, der Slowakei, Slowenien, Kroatien, der Schweiz, Italien, Frankreich, Österreich und den USA umfasste. [less ▲]

Detailed reference viewed: 122 (3 UL)
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See detailSign of our Times? Revis(it)ing the International Symbol of Access
Ben-Moshe, Liat; Powell, Justin J W UL

in Disability and Society (2007), 22(5), 489-505

The International Symbol of Access (ISA), used in a variety of specific locations to represent purposely facilitated access, has become ubiquitous throughout the world within just a few decades. Found ... [more ▼]

The International Symbol of Access (ISA), used in a variety of specific locations to represent purposely facilitated access, has become ubiquitous throughout the world within just a few decades. Found wherever people move in physical space and needing to navigate environmental barriers, this symbol is among the most widely recognized representations of disability. While it provides daily interactions with issues of accessibility and disability, its purposes and design in different cultural contexts are neither obvious nor uncontested. We sketch the origin, goals and critiques of this prominent symbol and discuss its functions, from way showing to identity construction and advocacy/activism. Finally, we examine current proposals for alternative symbols. [less ▲]

Detailed reference viewed: 374 (4 UL)
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See detailSignal control strategies in day-to-day dynamic process of combined traffic assignment and control
Huang, Wei; Viti, Francesco UL; Tampere, Chris M.J.

Scientific Conference (2013)

Detailed reference viewed: 96 (3 UL)
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See detailSignal detection and synchronization for interference overloaded satellite broadcast reception
Grotz, Joel UL; Ottersten, Björn UL; Jens, Krause

in IEEE Transactions on Wireless Communications (2010), 9(10), 3052-3063

We address fixed satellite broadcast reception with the goal of decreasing the aperture of the receiving antenna. The front-end antenna size is commonly determined by the presence of interference from ... [more ▼]

We address fixed satellite broadcast reception with the goal of decreasing the aperture of the receiving antenna. The front-end antenna size is commonly determined by the presence of interference from adjacent satellites. A small antenna aperture leads to interference from neighboring satellites utilizing the same frequency bands. We propose a reception system with M multiple input elements and with subsequent joint detection of desired and interfering signals that provides reliable communication in the presence of multiple interfering signals. An iterative least squares technique is adopted combining spatial and temporal processing and achieving robustness against pointing errors. Simulation results show how the proposed joint spatial and temporal adapted mechanism outperforms the simple combination of existing techniques under interference overloaded conditions. Also, we demonstrate how to accurately synchronize the signals as part of the detection procedure. The technique is evaluated in a realistic simulation study representing the conditions encountered in a DVB-S2 broadcast scenario. [less ▲]

Detailed reference viewed: 253 (4 UL)
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See detailSignal Obstructions at GNSS Stations: Benefits From Multi-GNSS Observations
Abraha, Kibrom Ebuy UL; Teferle, Felix Norman UL; Hunegnaw, Addisu UL et al

Poster (2015, October 27)

The current accuracy of IGS products, few centimeter level, requires amongst other things that the location for GNSS antennas are nearly optimal for GNSS observations. This includes a low multipath ... [more ▼]

The current accuracy of IGS products, few centimeter level, requires amongst other things that the location for GNSS antennas are nearly optimal for GNSS observations. This includes a low multipath environment and little to no signal obstructions. However, this is not guaranteed for every station especially in urban areas and mountainous regions. As some applications such as GNSS for sea level studies or to monitor landslides require GNSS antennas to be installed at a specific site, it is clear that the environment might not be favourable for GNSS observations. In this study, we investigate the effect of signal obstructions on station positions, specifically the height component, based on simulated obstruction scenarios using a modified Bernese GNSS Software version 5.2 (BSW52). The behaviours of different obstruction scenarios and the impact of multi-GNSS (GPS+GLONASS for now) observations for both clear and obstructed stations are discussed. [less ▲]

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See detailSignal phase and timing (spat) for cooperative public transport priority measures
Seredynski, Marcin; Viti, Francesco UL; Khadraoui, Djamel

Scientific Conference (2015, October)

Detailed reference viewed: 101 (1 UL)
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See detailSignal prediction using fractional derivative models
Skovranek, Tomas; Despotovic, Vladimir UL

in Bǎleanu, Dumitru; Mendes Lopes, António (Eds.) Handbook of Fractional Calculus with Applications (2019)

In this chapter the linear prediction (LP) and its generalisation to fractional linear prediction (FLP) is described with the possible applications to one-dimensional (1D) and two-dimensional (2D) signals ... [more ▼]

In this chapter the linear prediction (LP) and its generalisation to fractional linear prediction (FLP) is described with the possible applications to one-dimensional (1D) and two-dimensional (2D) signals. Standard test signals, such as the sine wave, the square wave, and the sawtooth wave, as well as the real-data signals, such as speech, electrocardiogram and electroencephalogram are used for the numerical experiments for the 1D case, and grayscale images for the 2D case. The 1D FLP model is proposed to have a similar construction as the LP model, i.e. it uses linear combination of fractional derivatives with different values of the fractional order. The 2D FLP model uses linear combination of the fractional derivatives in two directions, horizontal and vertical. The scheme for the computation of the optimal predictor coefficients for both 1D and 2D FLP models is also provided. The performance of the proposed FLP models is compared to the performance of the LP models, confirming that the proposed FLP can be successfully applied in processing of 1D and 2D signals, giving comparable or better performance using the same or even smaller number of parameters. [less ▲]

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See detailSignal Processing for high Throughput Satellite Systems: Challenges for new interference Limited Scenarios
Pérez-Neira, Ana L.; Vazquez, Miguel Angel; Shankar, Bhavani UL et al

in Signal Processing (2019)

The field of satellite communications is enjoying a renewed interest in the global telecom market, and very high throughput satellites (V/HTS), with their multiple spot-beams, are key for delivering the ... [more ▼]

The field of satellite communications is enjoying a renewed interest in the global telecom market, and very high throughput satellites (V/HTS), with their multiple spot-beams, are key for delivering the future rate demands. In this article, the state-of-the-art and open research challenges of signal processing techniques for V/HTS systems are presented for the first time, with focus on novel approaches for efficient interference mitigation. The main signal processing topics for the ground, satellite, and user segment are addressed. Also, the critical components for the integration of satellite and terrestrial networks are studied, such as cognitive satellite systems and satellite-terrestrial backhaul for caching. All the reviewed techniques are essential in empowering satellite systems to support the increasing demands of the upcoming generation of communication networks. [less ▲]

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See detailSignal Processing for High-Throughput Satellites: Challenges in New Interference-Limited Scenarios
Perez, Ana; Vazquez, Miguel; Shankar, Bhavani UL et al

in IEEE Signal Processing Magazine (2019)

The field of satellite communications (SatCom) is enjoying renewed attention in the global telecommunications market, and high-throughput satellites, with their multiple spot beams, are critical ... [more ▼]

The field of satellite communications (SatCom) is enjoying renewed attention in the global telecommunications market, and high-throughput satellites, with their multiple spot beams, are critical components for delivering the rates that will be demanded in the future. In this article, we present the state of the art and the open research challenges in the area of high-throughput satellites, with a focus on signal processing approaches for efficient interference mitigation. [less ▲]

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See detailSIGNAL PROCESSING FOR PHYSICAL LAYER SECURITY WITH APPLICATION IN SATELLITE COMMUNICATIONS
Kalantari, Ashkan UL

Doctoral thesis (2016)

Wireless broadcast allows widespread and easy information transfer. However, it may expose the information to unintended receivers, which could include eavesdroppers. As a solution, cryptography at the ... [more ▼]

Wireless broadcast allows widespread and easy information transfer. However, it may expose the information to unintended receivers, which could include eavesdroppers. As a solution, cryptography at the higher network levels has been used to encrypt and protect data. Cryptography relies on the fact that the computational power of the adversary is not enough to break the encryption. However, due to increasing computing power, the adversary power also increases. To further strengthen the security and complement the encryption, the concept of physical layer security has been introduced and surged an enormous amount of research. Widely speaking, the research in physical layer security can be divided into two directions: the information-theoretic and signal processing paradigms. This thesis starts with an overview of the physical layer security literature and continues with the contributions which are divided into the two following parts. In the first part, we investigate the information-theoretic secrecy rate. In the first scenario, we study the confidentiality of a bidirectional satellite network consisting of two mobile users who exchange two messages via a multibeam satellite using the XOR network coding protocol. We maximize the sum secrecy rate by designing the optimal beamforming vector along with optimizing the return and forward link time allocation. In the second scenario, we study the effect of interference on the secrecy rate. We investigate the secrecy rate in a two-user interference network where one of the users, namely user 1, requires to establish a confidential connection. User 1 wants to prevent an unintended user of the network to decode its transmission. User 1 has to adjust its transmission power such that its secrecy rate is maximized while the quality of service at the destination of the other user, user 2, is satisfied. We obtain closed-form solutions for optimal joint power control. In the third scenario, we study secrecy rate over power ratio, namely ``secrecy energy efficiency''. We design the optimal beamformer for a multiple-input single-output system with and without considering the minimum required secrecy rate at the destination. In the second part, we follow the signal processing paradigm to improve the security. We employ the directional modulation concept to enhance the security of a multi-user multiple-input multiple-output communication system in the presence of a multi-antenna eavesdropper. Enhancing the security is accomplished by increasing the symbol error rate at the eavesdropper without the eavesdropper's CSI. We show that when the eavesdropper has less antennas than the users, regardless of the received signal SNR, it cannot recover any useful information; in addition, it has to go through extra noise enhancing processes to estimate the symbols when it has more antennas than the users. Finally, we summarize the conclusions and discuss the promising research directions in the physical layer security. [less ▲]

Detailed reference viewed: 737 (51 UL)