References of "2007"
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See detailPerformance Limitations of IEEE 802.11 Networks and Potential Enhancements
Granelli, Fabrizio; Kliazovich, Dzmitry UL; Fonseca, Nelson L. S.

in International Journal of Computer Research (2007), 14(1), 85-108

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See detailCompliance of RIES to the proposed e-Voting protection profile
Jonker, Hugo UL; Volkamer, Melanie

in Proc. First Conference on E-Voting and Identity (VOTE-ID’07) (2007)

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See detailComing to college or getting out of school?
Davies, J.; Biesta, Gert UL

in Research Papers in Education (2007), 22(1), 23-41

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See detailConception d'un cours de luxembourgeois en ligne : prise en compte de contraintes externes dans les choix méthodologiques et didactiques
Kachafoutdinova, Elvira UL; Zampunieris, Denis UL

in Apprentissage des langues et systèmes d'information et de communication (2007), 10(2), 71-86

À travers le projet "Quattropole : e-learning pour l'apprentissage du luxembourgeois", nous aborderons la conception et la réalisation d'un cours de luxembourgeois en ligne. Cet article relatera les ... [more ▼]

À travers le projet "Quattropole : e-learning pour l'apprentissage du luxembourgeois", nous aborderons la conception et la réalisation d'un cours de luxembourgeois en ligne. Cet article relatera les difficultés liées à la mise en place d'un tel dispositif pour un public d'adultes francophones frontaliers. En analysant les choix méthodologiques et didactiques en rapport avec les contraintes externes, cet article présentera le retour d'expérience sur la base des réponses des apprenants au formulaire de satisfaction mis à leur disposition. [less ▲]

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See detailJahrmärkte in Europa im 14.-16. Jahrhundert. Regionale Untersuchungen und der Versuch einer Typologie
Pauly, Michel UL

in Irsigler, Franz; Pauly, Michel (Eds.) Messen, Jahrmärkte und Stadtentwicklung in Europa (2007)

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See detailEnhanced GPSR Routing in Multi-Hop Vehicular Communications through Movement Awareness
Granelli, Fabrizio; Boato, Giulia; Kliazovich, Dzmitry UL et al

in IEEE Communications Letters (2007), 11(10), 781-783

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See detailCreating local contrast in small-angle neutron scattering by dynamic nuclear polarization
van den Brandt, B.; Glattli, H.; Hautle, P. et al

in Journal of Applied Crystallography (2007), 40(s), 106-110

Low-resolution small-angle neutron scattering measurements can benefit from polarized protons to generate scattering contrast profiles. In a recently developed technique, time-resolved polarized SANS ... [more ▼]

Low-resolution small-angle neutron scattering measurements can benefit from polarized protons to generate scattering contrast profiles. In a recently developed technique, time-resolved polarized SANS tries to make use of spatial polarization gradients created around paramagnetic centres at the onset of dynamic nuclear polarization. The time constants which describe the build-up of polarization around the paramagnetic centre and the subsequent diffusion of polarization in the solvent were determined by analysing the temporal evolution of the nuclear polarization. The possible use and the limitations of this technique as a spectroscopic tool are discussed. [less ▲]

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See detailEntre langue-objet et objets de discours: le formatage située des activités en classe de langue
Berger, Evelyne UL; Fasel, Virginie; Pekarek, Simona et al

in Revue de Psychologie (2007), (61), 16-25

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See detailControverses autour du passeport européen des sociétés de gestion d'OPCVM
Prüm, André UL

in Revue de Droit Bancaire et Financier (2007), (5), 1

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See detailPerformance Improvement in Wireless Networks using Cross-layer ARQ
Kliazovich, Dzmitry UL; Granelli, Fabrizio; Gerla, Mario

in Computer Networks (2007), 51(15), 4396-4411

This paper presents a novel cross-layer approach (LLE-TCP) designed for performance enhancement of TCP over a large variety of wireless networks. LLE-TCP avoids TCP ACK packet transmission over the ... [more ▼]

This paper presents a novel cross-layer approach (LLE-TCP) designed for performance enhancement of TCP over a large variety of wireless networks. LLE-TCP avoids TCP ACK packet transmission over the wireless channel. As a result, the saved time can be utilized by the nodes for data packet delivery. The proposed scheme enhances the protocol stacks of the wireless sender (or a base station) and the receiver with cross-layer ARQ agents which support ACK suppression. ARQ agent suppresses the outgoing ACKs at the receiver side and generates them locally at the sender or base station. The performance evaluation of the proposed approach is performed via simulations as well as IEEE 802.11 testbed experiments for single-hop and infrastructure network scenarios. LLE-TCP demonstrates the performance improvement in the range of 20–100% depending on the transmitted TCP/IP datagram size. Among the factors contributing to performance enhancement are: medium busy time reduction, reduced sensibility to link errors, reduced round trip time (RTT), and improved congestion control. A good level of throughput fairness as well as a fair coexistence with state-of-the-art TCP modifications ensures proper functionality of the proposed approach, while performance advantages extended even on non-LLE-TCP users favor an incremental deployment of the technique in existing networks. [less ▲]

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See detailContexte organisationnel et évaluation de l’utilisabilité d’un site portail : Influence des logiques organisationnelles sur la structure du système d’information
Faurie, Isabelle; Amiel, Alban; Van De Leemput, Cécile et al

in Zouinar, Moustafa; Vallery, Gérard; Leport, Marie-Christine (Eds.) Ergonomie des produits et des services (2007)

L’étude se centre sur le processus de reconception de sites web et sur la spécificité des sites à mission de service public. L’intervention ergonomique présentée correspond en effet à une demande de ... [more ▼]

L’étude se centre sur le processus de reconception de sites web et sur la spécificité des sites à mission de service public. L’intervention ergonomique présentée correspond en effet à une demande de restructuration du portail Internet d’un service administratif. Des entretiens et des tests d’utilisabilité effectués auprès des différents publics cibles ont permis de mettre en évidence : d’une part, l’incidence des facteurs organisationnels sur les " défauts " d’utilisabilité du site, notamment sur sa cohérence interne ; d’autre part, l’existence de décalages importants entre les représentations que les concepteurs ont des besoins des utilisateurs et les besoins réels de ces derniers. La discussion porte sur les implications théoriques et pratiques de tels résultats dans la gestion du processus de reconception d’un portail web et aboutit à la définition de préconisations. [less ▲]

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See detailLa pédagogie entre sciences de l'éducation et art
Weber, Jean-Marie UL

in Transfert (2007), 5

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See detailBasis functions for the consistent and accurate representation of surface mass loading
Clarke, Peter J.; Lavallée, David A.; Blewitt, Geoffrey et al

in Geophysical Journal International (2007), 171(1), 1-10

Inversion of geodetic site displacement data to infer surface mass loads has previously been demonstrated using a spherical harmonic representation of the load. This method suffers from the continent-rich ... [more ▼]

Inversion of geodetic site displacement data to infer surface mass loads has previously been demonstrated using a spherical harmonic representation of the load. This method suffers from the continent-rich, ocean-poor distribution of geodetic data, coupled with the predominance of the continental load (water storage and atmospheric pressure) compared with the ocean bottom pressure (including the inverse barometer response). Finer-scale inversion becomes unstable due to the rapidly increasing number of parameters which are poorly constrained by the data geometry. Several approaches have previously been tried to mitigate this, including the adoption of constraints over the oceanic domain derived from ocean circulation models, the use of smoothness constraints for the oceanic load, and the incorporation ofGRACEgravity field data. However, these methods do not provide appropriate treatment of mass conservation and of the ocean’s equilibrium-tide response to the total gravitational field. Instead,we propose a modified set of basis functions as an alternative to standard spherical harmonics. Our basis functions allow variability of the load over continental regions, but impose global mass conservation and equilibrium tidal behaviour of the oceans. We test our basis functions first for the efficiency of fitting to realistic modelled surface loads, and then for accuracy of the estimates of the inferred load compared with the known model load, using synthetic geodetic displacements with real GPS network geometry. Compared to standard spherical harmonics, our basis functions yield a better fit to the model loads over the period 1997–2005, for an equivalent number of parameters, and provide a more accurate and stable fit using the synthetic geodetic displacements. In particular, recovery of the low-degree coefficients is greatly improved. Using a nine-parameter fit we are able to model 58 per cent of the variance in the synthetic degree-1 zonal coefficient time-series, 38–41 per cent of the degree-1 non-zonal coefficients, and 80 per cent of the degree-2 zonal coefficient. An equivalent spherical harmonic estimate truncated at degree 2 is able to model the degree-1 zonal coefficient similarly (56 per cent of variance), but only models 59 per cent of the degree-2 zonal coefficient variance and is unable to model the degree-1 non-zonal coefficients. [less ▲]

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See detailDepletion induced isotropic-isotropic phase separation in suspensions of rod-like colloids
Jungblut, S.; Tuinier, R.; Binder, K. et al

in Journal of Chemical Physics (2007), 127(24),

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See detailDepletion-induced percolation in networks of nanorods
Schilling, Tanja UL; Jungblut, S.; Miller, M. A.

in Physical Review Letters (2007), 98(10),

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See detailGaussian approximations of multiple integrals
Peccati, Giovanni UL

in Electronic Communications in Probability (2007), 12

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See detailLa méthodologie du card-sorting dans l’accompagnement d’un processus de restructuration de sites web
van de Leemput, Cécile; Koenig, Vincent UL; Alban, Amiel et al

in Zouinar, Moustafa; Vallery, Gérard; Leport, Marie-Christine (Eds.) Ergonomie des produits et des services (2007)

La méthodologie du card-sorting a été utilisée dans le cadre d’un processus de restructuration de multiples sites Internet et Intranet d’une grande entreprise en vue d’élaborer un portail unique. Cette ... [more ▼]

La méthodologie du card-sorting a été utilisée dans le cadre d’un processus de restructuration de multiples sites Internet et Intranet d’une grande entreprise en vue d’élaborer un portail unique. Cette méthodologie offre la possibilité d’investiguer la structure des informations indépendamment des comportements de navigation. La complémentarité des approches des tests d’utilisabilité et du card-sorting permet de se distancier, lors de la phase du card sorting, des difficultés d’utilisabilité liées à l’interface qui est présentée à l’utilisateur pour se focaliser sur des problèmes structurels sous-jacents. L’analyse structurelle des résultats permet d’appréhender les représentations mentales et les catégorisations cognitives qu’effectuent les utilisateurs lorsqu’ils sont eux-mêmes amenés à structurer l’interface. [less ▲]

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See detailStable convergence of generalized $L^2$ stochastic integrals and the principle of conditioning
Peccati, Giovanni UL; Taqqu, Murad S.

in Electronic Journal of Probability (2007), 12

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See detailUne ville plus que millénaire
Pauly, Michel UL

Article for general public (2007)

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See detailDer geheime Lehrplan des Luxemburger Sprachenunterrichts
Fehlen, Fernand UL

in Forum für Politik, Gesellschaft und Kultur in Luxemburg (2007), 264

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