References of "2009"
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See detailDidaktik des Musiklehrerberufs. Die Musikschulpädagogik in Luxemburg
Sagrillo, Damien UL

Scientific Conference (2009, December 22)

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See detailBearing capacity of steel fiber reinforced concrete flat slabs
Michels, Julien UL

Doctoral thesis (2009)

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See detailLe décrochage universitaire: Une déviance?
Amara, Marie-Emmanuelle UL

Conference given outside the academic context (2009)

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See detailJeunesses et respect dans une société fragmentée En quoi respect et reconnaissance sont au cœur des constructions identitaires des jeunes et de leur intégration dans la société ?
Kerivel, Aude UL

Doctoral thesis (2009)

La société s’interroge sur les actes irrespectueux de certains jeunes et ces derniers demandent du respect. Un paradoxe qui nous amène à donner la parole aux jeunes afin de comprendre le sens qu’ils ... [more ▼]

La société s’interroge sur les actes irrespectueux de certains jeunes et ces derniers demandent du respect. Un paradoxe qui nous amène à donner la parole aux jeunes afin de comprendre le sens qu’ils donnent au respect. D’un point de vue théorique et empirique, le respect se caractérise par sa pluralité de sens (dans la forme et le fond) et se définit souvent par son contraire : l’irrespect. Les deux sont directement liés : agir de manière irrespectueuse peut être un moyen de tenir l’autre en respect. L’irrespect subit par les jeunes nous conduit alors à considérer ces expériences en tant que relation intersubjective au travers de l’identité de l’offenseur et de l’offensé. Perçue comme égalitaire et réciproque, la relation de respect implique dans les discours des jeunes une hiérarchie ; celle ci nous amenant à interroger la notion d’autorité. L’autorité, autrefois inhérente au rapport entre adultes et jeunes, est aujourd’hui tantôt contestée, tantôt perçue comme une nécessité. Dans le contexte d’une société que l’on peut qualifier de fragmentée, la quête de respect nous semble au cœur des constructions identitaires des jeunes et de leur intégration. Les jeunes se trouvent au centre de multiples paradoxes : une liberté restreinte parmi des possibles déterminés, une égalité inaccessible dans la distribution de l’estime et une fraternité remise en cause par la lutte des places. Pour les jeunes, le respect serait le langage de la reconnaissance permettant la mobilité dans l’espace-temps. Une mobilité conditionnée par le fait d’avoir été considéré comme valable dans le regard de l’Autre et donc la possibilité de se percevoir comme respectable. [less ▲]

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See detailLe mécanisme de la révision constitutionnelle au Grand-Duché de Luxembourg
Gerkrath, Jörg UL

in Journal des Tribunaux Luxembourg (2009), (6), 174-180

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See detailBerezin-Toeplitz quantization of moduli spaces
Schlichenmaier, Martin UL

Presentation (2009, December 03)

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See detailRealizing Arbitrary-Precision Modular Multiplication with a Fixed-Precision Multiplier Datapath
Großschädl, Johann UL; Savas, Erkay; Yumbul, Kazim

in Prasanna, Viktor K.; Torres, Lionel; Cumplido, René (Eds.) Proceedings of the 5th International Conference on Reconfigurable Computing and FPGAs (RECONFIG 2009) (2009, December)

Within the context of cryptographic hardware, the term scalability refers to the ability to process operands of any size, regardless of the precision of the underlying datapath or registers. In this paper ... [more ▼]

Within the context of cryptographic hardware, the term scalability refers to the ability to process operands of any size, regardless of the precision of the underlying datapath or registers. In this paper we present a simple yet effective technique for increasing the scalability of a fixed-precision Montgomery multiplier. Our idea is to extend the datapath of a Montgomery multiplier in such a way that it can also perform an ordinary multiplication of two n-bit operands (without modular reduction), yielding a 2n-bit result. This conventional (n*n->2n)-bit multiplication is then used as a "sub-routine" to realize arbitrary-precision Montgomery multiplication according to standard software algorithms such as Coarsely Integrated Operand Scanning (CIOS). We show that performing a 2n-bit modular multiplication on an n-bit multiplier can be done in 5n clock cycles, whereby we assume that the n-bit modular multiplication takes n cycles. Extending a Montgomery multiplier for this extra functionality requires just some minor modifications of the datapath and entails a slight increase in silicon area. [less ▲]

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See detail欧洲绝对重力仪比对观测 (ECGS’07)
邢乐林; 申重阳; 李辉 et al

in 地球物理学进展 (Progress in Geophysics) (2009), 24(6), 2054-2057

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See detailEnergy-efficient distributed spectrum sensing with convex optimization
Maleki, Sina UL; Pandharipande, Ashish; Leus, Geert

in 3rd IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP), 2009 (2009, December)

We consider the problem of distributed spectrum sensing in cognitive radio networks with a central fusion center, from an energy efficiency viewpoint. In our scheme, each cognitive radio adopts a ... [more ▼]

We consider the problem of distributed spectrum sensing in cognitive radio networks with a central fusion center, from an energy efficiency viewpoint. In our scheme, each cognitive radio adopts a combination of sleeping and censoring to obtain a sensing result based on energy detection, while the fusion center combines all the sensing results using an OR decision rule. Our goal is to minimize the network energy consumption, given constraints on the global probabilities of detection and false-alarm. We show that the underlying optimization problem can be solved as a convex optimization problem. We then show the energy efficiency of our scheme via simulations using a ZigBee transceiver model. [less ▲]

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See detailFive guidelines for normative multiagent systems
Boella, Guido UL; Pigozzi, Gabriella UL; van der Torre, Leon UL

in Proceedings of JURIX 2009 - The 22nd International Conference on Legal Knowledge and Information Systems (2009, December)

n this paper we introduce and discuss five guidelines for the use of normative systems in computer science. We adopt a multiagent systems perspective, because norms are used to coordinate, organize, guide ... [more ▼]

n this paper we introduce and discuss five guidelines for the use of normative systems in computer science. We adopt a multiagent systems perspective, because norms are used to coordinate, organize, guide, regulate or control interaction among distributed autonomous systems. They are derived from the computer science literature. From the so-called ‘normchange’ definition of the first workshop on normative multiagent systems in 2005 we derive the guidelines to motivate which definition of normative multiagent system is used, to make explicit why norms are a kind of (soft) constraints deserving special analysis, and to explain why and how norms can be changed at runtime. From the so-called ‘mechanism design’ definition of the second workshop on normative multiagent systems in 2007 we derive the guidelines to discuss the use and role of norms as a mechanism in a game-theoretic setting, and to clarify the role of norms in the multiagent system. [less ▲]

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See detailRobust Cognitive Beamforming With Bounded Channel Uncertainties
Zheng, Gan UL; Wong, K.-K.; Ottersten, Björn UL

in IEEE Transactions on Signal Processing (2009), 57(12), 4871-4881

This paper studies the robust beamforming design for a multi-antenna cognitive radio (CR) network, which transmits to multiple secondary users (SUs) and coexists with a primary network of multiple users ... [more ▼]

This paper studies the robust beamforming design for a multi-antenna cognitive radio (CR) network, which transmits to multiple secondary users (SUs) and coexists with a primary network of multiple users. We aim to maximize the minimum of the received signal-to-interference-plus-noise ratios (SINRs) of the SUs, subject to the constraints of the total SU transmit power and the received interference power at the primary users (PUs) by optimizing the beamforming vectors at the SU transmitter based on imperfect channel state information (CSI). To model the uncertainty in CSI, we consider a bounded region for both cases of channel matrices and channel covariance matrices. As such, the optimization is done while satisfying the interference constraints for all possible CSI error realizations. We shall first derive equivalent conditions for the interference constraints and then convert the problems into the form of semi-definite programming (SDP) with the aid of rank relaxation, which leads to iterative algorithms for obtaining the robust optimal beamforming solution. Results demonstrate the achieved robustness and the performance gain over conventional approaches and that the proposed algorithms can obtain the exact robust optimal solution with high probability. [less ▲]

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See detailA sociolinguistic profile of The Gambia
Juffermans, Kasper UL; McGlynn, Caroline

in Sociolinguistic Studies = Estudios de Sociolingüística (2009), 3(3), 329-355

This paper outlines the sociolinguistic situation in the smallest country of mainland Africa, The Gambia. Very little has been published about the languages and sociolinguistic situation in The Gambia and ... [more ▼]

This paper outlines the sociolinguistic situation in the smallest country of mainland Africa, The Gambia. Very little has been published about the languages and sociolinguistic situation in The Gambia and it was upon discovering this dearth of reliable published sources that led the authors to pool knowledge garnered during independent doctoral research. In this paper we have coupled language shift with a detailed description of the dynamic sociolinguistic profile of The Gambia and trust that it contributes to an understanding of changing ecologies of language in West Africa. Following a portrayal of the indigenous and exogenous languages of The Gambia, with attention to hybrid, overlapping and shifting ethnolinguistic identities, the role of language in several social institutions in a changing society is identified and discussed. The paper culminates in a discussion of linguistic and cultural diversity and appeals for more research in this sociolinguistically unexposed country. [less ▲]

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See detailNichtgleichgewichtsphänomene, Strukturbildung und Grenzflächeneinflüsse in netzwerkbildenden Systemen aus optischer und akustischer Sicht.
Philipp, Martine UL

Doctoral thesis (2009)

Isostructural phase transitions occurring under non-equilibrium conditions are investigated using technologically relevant epoxies. The evolution of the hypersonic and optical properties during the ... [more ▼]

Isostructural phase transitions occurring under non-equilibrium conditions are investigated using technologically relevant epoxies. The evolution of the hypersonic and optical properties during the genesis of the polymeric network leads to deeper insight into the chemically induced sol-gel transition and glass transition, as demonstrated e.g. by the elastic anharmonicity and the generalised Cauchy relation. During gelation the refractive index versus chemical conversion behaves in an unexpected manner, indicating that in addition to the mass density an excess polarisability seems to contribute to the optical polarisability. The clarification of the isostructural phase transitions is impeded by the demixing tendency of the epoxy components which leads to different types of epoxy inhomogeneities on the nano- to mesoscopic scale. Taking benefit from a sample arrangement where both epoxy components are layered, the spatio-temporal evolution of acoustic properties gives supplementary information about trans-interfacial transport and structure formation processes. Of special technological relevance, but also of fundamental interest, is the influence of nanoscopic disturbances placed into the epoxy matrix. So-called interphases surrounding the nanoparticles modify and complicate the epoxy network formation, leading to long-lived metastable morphologies and properties. The role of the mixing sequence of the epoxy resin, the hardener and the nanoparticles for the polymerised epoxy state and the transient states during network formation, as well as the isostructural phase transitions is further elucidated. [less ▲]

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See detailZur Rotationskapazität von Verbundanschlüssen bei der Bemessung nach dem Fließgelenkverfahren
Hahn, Christoph UL

Doctoral thesis (2009)

The present work deals with the load bearing and rotational behaviour of composite connections in steel and concrete constructions. For typical buildings, composite connections are assumed to be rigid or ... [more ▼]

The present work deals with the load bearing and rotational behaviour of composite connections in steel and concrete constructions. For typical buildings, composite connections are assumed to be rigid or pinned. This assumption can lead to uneconomic structures. A design concept for the estimation of the available rotation capacity, the initial stiffness and the moment bearing capacity of semi-rigid connections is presented. On the basis of the plastic hinge theory diagrams were developed to prove the load carrying capacity and the serviceability of composite beams with semi-rigid connections. The presented design model is based on the evaluation of 9 self conducted tests and on the evaluation of 74 tests on composite connections from all over Europe. The availability of the model was proved by intensive nonlinear finite element simulations. [less ▲]

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See detailFonctionnement limite et traumatismes de vie
Schiltz, Lony; Boyer, Laetitia; Ciccarello, Audrey et al

Scientific Conference (2009, November 18)

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See detailHow to measure complex problem solving: Ideas, approach & software
Greiff, Samuel UL

Presentation (2009, November 11)

Detailed reference viewed: 17 (1 UL)
See detailBerezin-Toeplitz quantization of moduli spaces
Schlichenmaier, Martin UL

Presentation (2009, November 06)

Detailed reference viewed: 9 (1 UL)