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See detailComputer Based School System Monitoring with Feedback to Teachers
Plichart, Patrick; Busana, Gilbert UL; Martin, Romain UL et al

in Proceedings of World Conference on Educational Multimedia, Hypermedia and Telecommunications 2008 (2008), 2008(1), 5065-5070

Educational multimedia focuses traditionally on the design of computer aided learning environments. Evaluation has to be viewed as an essential part of the learning environment. Beyond opportunities ... [more ▼]

Educational multimedia focuses traditionally on the design of computer aided learning environments. Evaluation has to be viewed as an essential part of the learning environment. Beyond opportunities provided by its computerization (behaviours tracking, richer interactions, etc.), Computer Based Assessment provides teachers a measurement instrument where their students are put together with larger groups of students on the same assessment scale, using a unique competency model. It provides feedback to teachers that enable them to early detect shortcomings of their courses, pedagogical approach. ICT provides in this case a flexible way for the results collection, feedback reporting raising strengths and weaknesses, assurance of anonymity, data privacy. Moreover, it would give decision makers of the educational system information on the educational system steering efficiency. This paper describes ongoing assessment based on the TAO platform (http://www.tao.lu) with feedback to teachers done in Luxembourg. [less ▲]

Detailed reference viewed: 102 (0 UL)
See detailSWR 1000 integral and full scale tests of the passive safety systems
Leyer, Stephan UL; Wich, M.; Schafer, H.

in International Conference on Advances in Nuclear Power Plants, ICAPP 2008 (2008), 1

The SWR 1000 is an innovative boiling water reactor concept with passive safety systems. In order to verify the functionality of the passive components required for the transient and accident management ... [more ▼]

The SWR 1000 is an innovative boiling water reactor concept with passive safety systems. In order to verify the functionality of the passive components required for the transient and accident management, the test facility INKA (Integral-Versuchstand Karlstein) is build up in Karlstein (Germany). The INKA test facility is designed to test the full scaled Emergency and Containment Cooling Condenser under steady state conditions as well as to simulate different postulated SWR 1000 transients and Loss of Coolant Accidents in a down scaled setup. The goal of the experiments is to obtain the power characteristics of the components and to demonstrate the ability of the passive safety systems to transfer the plant into a safe and stable state in case of a transient or LOCA. In this paper the INKA test facility setup including the tested components and the vessels, simulating the SWR 1000 containment will be described. [less ▲]

Detailed reference viewed: 98 (0 UL)
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See detailL'influence du droit européen de la consommation sur le droit des contrats
Poillot, Elise UL

in Droit & Patrimoine (2008)

Detailed reference viewed: 79 (6 UL)
See detailThe fluid mechanics of membrane filtration
Hale, Jack UL; Harris, A.; Li, Q. et al

in ASME International Mechanical Engineering Congress and Exposition, Proceedings (2008), 8 PART A

Reverse osmosis and nanofiltration membranes remove colloids, macromolecules, salts, bacteria and even some viruses from water. In crossflow filtration, contaminated water is driven parallel to the ... [more ▼]

Reverse osmosis and nanofiltration membranes remove colloids, macromolecules, salts, bacteria and even some viruses from water. In crossflow filtration, contaminated water is driven parallel to the membrane, and clean permeate passes through. A large pressure gradient exists across the membrane, with permeate flow rates two to three orders of magnitude smaller than that of the crossflow. Membrane filtration is hindered by two mechanisms, concentration polarization and caking. During filtration, the concentration of rejected particles increases near the membrane surface, forming a concentration polarization layer. Both diffusive and convective transport drive particles back into the bulk flow. However, the increase of the apparent viscosity in the concentration polarization layer hinders diffusion of particles back into the bulk and results in a small reduction in permeate flux. Depending on the number and type of particles present in the contaminated water, the concentration polarization will either reach a quasi-steady state or particles will begin to deposit onto the membrane. In the later case, a cake layer eventually forms on the membrane, significantly reducing the permeate flux. Contradictive theories suggest that the cake layer is either a porous solid or a very viscous (yield stress) fluid. New and refined models that shed light on these theories are presented. Copyright © 2007 by ASME. [less ▲]

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See detailNon-destructive Damage Assessment Using Non-linear Vibration
Waltering, Markus UL; Bungard, Volker UL; Maas, Stefan UL et al

in International Modal Analysis Conference, IMAC-XXVI (2008)

Detailed reference viewed: 94 (19 UL)
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See detailExamining parental perceptions of family, child adjustment, and school risk factors during the transition to secondary school
Born, MIchel; Poncelet, Débora UL; Bernard, Séverine

in SRA 2008 Biennial Meeting (2008)

Detailed reference viewed: 46 (3 UL)
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See detailThe impact of assessment goals on representativeness biases in teachers' assessments
Krolak-Schwerdt, Sabine UL; Böhmer, Matthias UL

in International Journal of Psychology (2008), 43

Detailed reference viewed: 72 (7 UL)
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See detailThe smoothed extended finite element method
Natarajan, S.; Bordas, Stéphane UL; Minh, Q. D. et al

in Proceedings of the 6th International Conference on Engineering Computational Technology (2008)

This paper shows how the strain smoothing technique recently proposed by G.R.Liu [1] coined as smoothed finite element method (SFEM) can be coupled to partition of unity methods, namely extended finite ... [more ▼]

This paper shows how the strain smoothing technique recently proposed by G.R.Liu [1] coined as smoothed finite element method (SFEM) can be coupled to partition of unity methods, namely extended finite element method (XFEM) [2] to give birth to the smoothed extended finite element method (SmXFEM), which shares properties both with the SFEM and the XFEM. The proposed method suppresses the need to compute and integrate the derivatives of shape functions (which are singular at the tip in linear elastic fracture mechanics). Additionally, integration is performed along the boundary of the finite elements or smoothing cells and no isoparametric mapping is required, which allows elements of arbitrary shape. We present numerical results for cracks in linear elastic fracture mechanics problems. The method is verified on several examples and comparisons are made to the conventional XFEM. © 2008 Civil-Comp Press. [less ▲]

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See detailDesirable Tie-breaking Rules in Collective Decision Making
Pigozzi, Gabriella UL; Slavkovik, Marija UL; van der Torre, Leon UL

in Annales du LAMSADE (2008)

Judgment aggregation (JA) studies how to aggregate individual judgments to form collective decisions. Examples are expert panels, legal courts, boards, and councils. The problems investigated in this new ... [more ▼]

Judgment aggregation (JA) studies how to aggregate individual judgments to form collective decisions. Examples are expert panels, legal courts, boards, and councils. The problems investigated in this new field are relevant and common to many situations. Nevertheless, the existing procedures are idealized and, likewise the related problems of preference aggregation in social choice theory, the field is plagued by impossibility theorems. In this paper, we extend standard JA in order to offer a more realistic framework and to escape the impossibility results. We propose to distinguish between abstainers and neutral judgment as well as to model the notion of confidence a group member may have in the decision rule by assigning to each criterion a normalized weight. We then show how this new framework may help us to avoid indecision in most cases. [less ▲]

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See detailBearing capacity of SFRC-flat slabs
Michels, Julien UL; Waldmann, Danièle UL; Maas, Stefan UL et al

in Proceedings of the 7th RILEM-Symposium on Fiber Reinforced Concrete (2008)

Detailed reference viewed: 95 (6 UL)
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See detailDamage assessment of a gradually damaged pre-stressed concrete bridge using static load tests and non-linear vibration characteristic
Waltering, Markus UL; Bungard, Volker UL; Maas, Stefan UL et al

in International Conference on Noise and Vibration Engineering (2008)

Detailed reference viewed: 101 (15 UL)
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See detailThe Random Oracle Model and the Ideal Cipher Model Are Equivalent
Coron, Jean-Sébastien UL; Patarin, Jacques; Seurin, Yannick

in Advances in Cryptography (2008)

Detailed reference viewed: 152 (3 UL)
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See detailBearing capacity of SFRC flat slabs with openings in the column area: experimental and numerical investigation
Michels, Julien UL; Waldmann, Danièle UL; Maas, Stefan UL et al

in Proceedings of the 7th RILEM-Symposium of Fiber Reinforced Concrete (2008)

Detailed reference viewed: 84 (4 UL)
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See detailCapacité portante de planchers-dalles en béton de fibres
Michels, Julien UL; Waldmann, Danièle UL; Maas, Stefan UL et al

in Proceedings of the 26th meeting of the Association Universitaire du Génie Civil (2008)

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See detailStructural Health Monitoring of a Composite Bridge
Bungard, Volker UL; Waltering, Markus UL; Waldmann, Danièle UL et al

in International Modal Analysis Conference (IMAC-XXVI) (2008)

Detailed reference viewed: 101 (15 UL)
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See detailStartle-Reaktion und Verarbeitungsleistung bei Heroinabhängigkeit
Dürsteler-MacFarland, K. M.; Degen, B.; Albrich, J. et al

in Nervenarzt (2008), 79(Supplement 4), 300-300

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See detailHedaquin: A reputation-based health data quality indicator
van Deursen, Ton UL; Koster, Paul; Petkovic, Milan

in Electronic Notes in Theoretical Computer Science (2008), 1997(2), 159-167

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See detailVerzerrte Aufmerksamkeitslenkung auf Heroinreize bei opioidsubstituierten Patienten
Degen, B.; Schächinger, H.; Albrich, J. et al

in Nervenarzt (2008), 79(Supplement 4), 300-300

Detailed reference viewed: 58 (0 UL)
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See detailVerzerrte Aufmerksamkeitslenkung auf Heroinreize bei opioidsubstituierten Patienten
Degen, B.; Schächinger, H.; Albrich, J. et al

in Sucht (2008), 54(3), 155-155

Detailed reference viewed: 53 (0 UL)
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See detailPsychological predictors of PTSD symptomatology for victims of motor vehicle accidents
Recchia, Sophie UL; Steffgen, Georges UL; Wampach, Nathalie UL

in Journal of Prenatal and Perinatal Psychology and Health (2008)

Detailed reference viewed: 118 (3 UL)
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See detailAdaptive and Dynamic Intrusion Detection by Means of Idiotypic Networks Paradigm
Ostaszewski, Marek UL; Bouvry, Pascal UL; Seredynski, Franciszek

in The 21th IEEE International Parallel and Distributed Processing Symposium (IPDPS), NIDISC Workshop. (2008)

In this paper we present a novel intrusion detection architecture based on Idiotypic Network Theory (INIDS), that aims at dealing with large scale network attacks featuring variable properties, like ... [more ▼]

In this paper we present a novel intrusion detection architecture based on Idiotypic Network Theory (INIDS), that aims at dealing with large scale network attacks featuring variable properties, like Denial of Service (DoS). The proposed architecture performs dynamic and adaptive clustering of the network traffic for taking fast and effective countermeasures against such high-volume attacks. INIDS is evaluated on the MIT'99 dataset and outperforms previous approaches for DoS detection applied to this set. [less ▲]

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See detailRights Management for Role-Based Access Control
Bouwman, B.; Mauw, Sjouke UL; Petkovic, M.

in Fifth Annual IEEE Consumer Communications & Networking Conference 2008 (CCNC'08) (2008)

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See detailBODYF - A Parameterless Broadcasting Protocol over Dynamic Forests
Ruiz, Patricia UL; Khadraoui, Djamel; Andronache, Adrian UL et al

in special session on Parallel and Grid Computing for Optimization as part of The 2008 International Conference High Performance Computing & Simulation (HPCS'08) and in conjunction with The 22nd European Conference on Modeling and Simulation (ECMS 2008) (2008)

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See detailL'édition des chartes du Luxembourg: un état des lieux
Pettiau, Hérold UL

in Actes des Deuxièmes Assises de l'historiographie luxembourgeoise. Colloque organisé du 23 au 24 novembre 2007 à l'Université du Luxembourg (2008)

Cette contribution fournit une analyse du travail d'édition de chartes et autres documents diplomatiques médiévaux à partir du XIXe siècle dans le Grand-Duché de Luxembourg, relatifs à l'ancien comté puis ... [more ▼]

Cette contribution fournit une analyse du travail d'édition de chartes et autres documents diplomatiques médiévaux à partir du XIXe siècle dans le Grand-Duché de Luxembourg, relatifs à l'ancien comté puis duché de Luxembourg sans oublier les éditions de documents effectuées dans les pays voisins. [less ▲]

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See detailInfluence of Inelastic Processes on Fast-Atom-Surface Diffraction
Aigner, F.; Simonovic, N.; Solleder, B. et al

in Journal of Physics: Conference Series (2008), 133

Diffraction of fast helium atoms at alkali-halide surfaces under grazing angles of incidence shows intriguing diffraction patterns. The persistence of quantum coherence is remarkably strong, even though ... [more ▼]

Diffraction of fast helium atoms at alkali-halide surfaces under grazing angles of incidence shows intriguing diffraction patterns. The persistence of quantum coherence is remarkably strong, even though high surface temperatures and high (keV) kinetic energies of the incident atoms would strongly suggest the dominance of dissipative and decohering processes. The main source of decoherence is the excitation or absorption of surface vibrations upon impact. The momentum transfer between the surface and the incident helium atom depends on the amplitude of the thermal vibrations of the surface atoms and the energy of the incident particle. We present an ab initio simulation of the quantum diffraction of fast helium beams at a LiF (100) surface in the < 110 > direction, and compare with recent experimental diffraction data. [less ▲]

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See detailI lussemburghesi e l'italiano, la lingua degli "orsi"
Cicotti, Claudio UL

in Italofonie. Risvolti identitari e culturali della lingua italiana nei piccoli Stati e nelle realtà territoriali esigue (2008)

Detailed reference viewed: 72 (1 UL)
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See detailAttack and Improvement of a Secure S-Box Calculation Based on the Fourier Transform
Coron, Jean-Sébastien UL; Giraud, Christophe; Prouff, Emmanuel et al

in Advances in Cryptography (2008)

Detailed reference viewed: 124 (0 UL)
See detailFeedback Reduction in Uplink MIMO OFDM Systems by Chunk Optimization
Jorswieck, Eduard; Sezgin, Aydin; Ottersten, Björn UL et al

in IEEE International Conference on Communications (ICC) (2008)

Detailed reference viewed: 136 (0 UL)
See detailWhile there is hope – Existentianl fears, hopelessness and quality of life in cancer patients
Hoffmann, Martine UL; Ferring, Dieter UL

in Annual Conference of the Canadian Association of Psychosocial Oncology. Halifax, Canada (2008)

Detailed reference viewed: 47 (1 UL)
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See detailFeedback design in multiuser MIMO systems using quantization splitting and hybrid instantaneous/statistical channel information
Björnson, Emil; Hammarwall, David; Zakhour, Randa et al

in Proceedings ICT Mobile and Wireless Communications Summit (2008)

In the design of next generation multiuser communication systems, multiple antenna transmission is an essential part providing spatial multiplexing gain and allowing efficient use of resources. A major ... [more ▼]

In the design of next generation multiuser communication systems, multiple antenna transmission is an essential part providing spatial multiplexing gain and allowing efficient use of resources. A major limiting factor in the resource allocation is the amount of channel state information (CSI) available at the transmitter, particularly in multiuser systems where the feedback from each user terminal must be limited. To this effect we propose two independent approaches for an efficient representation of the channel in multiuser MIMO systems. In the first approach, channel quantization is considered where the total number of feedback bits is limited. A resource allocation scheme is proposed where the available rate is split between the scheduling phase, where all users feed back a coarse CSI quantization, and the precoding phase where the selected receivers refine their CSI. The optimum splitting of the available feedback rate provides a large increase in performance and even simple heuristic splitting gives a noticeable advantage. In the second approach, we exploit a combination of instantaneous and statistical channel information. For spatially correlated Rayleigh and Ricean channels, it is shown that the CSI to large extent can be represented by the channel norm when the long-term channel statistics are known. Within a minimum mean square error (MMSE) estimation framework, feedback of a few bits of the quantized channel norm is sufficient to perform efficient resource allocation and achieve performance close to that of full CSI. [less ▲]

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See detailAd Hoc Collaborative Filtering for Mobile Networks
Gratz, Patrick UL; Andronache, Adrian UL; Rothkugel, Steffen UL

in Sensor Networks, Ubiquitous, and Trustworthy Computing, International Conference on (2008)

Detailed reference viewed: 104 (0 UL)
See detailValue orientations and solidarity in intergenerational family relations
Albert, Isabelle UL; Michels, Tom; Ferring, Dieter UL

in Invited talk at the Colloquia Psychologica, Sminatio internazionale. Athenaeum Center for Family Studies and Research – Catholic University of Milan, Milan, Italy. (2008)

Detailed reference viewed: 45 (0 UL)
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See detailVisuo-auditory sensory substitution for mobility assistance: testing TheVIBE
Durette, Barthélémy; Louveton, Nicolas UL; Alleysson, David et al

in Workshop on Computer Vision Applications for the Visually Impaired (2008) (2008)

Detailed reference viewed: 113 (5 UL)
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See detailA New DPA Countermeasure Based on Permutation Tables
Coron, Jean-Sébastien UL

in Advances in Cryptography (2008)

Detailed reference viewed: 142 (1 UL)
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See detailThe Influence of Mutation on Protein-Ligand Docking Optimization: A Locality Analysis
Tavares, Jorge; Tantar, Alexandru-Adrian UL; Melab, Nouredine et al

in LECTURE NOTES IN COMPUTER SCIENCE (2008), 5199

Evolutionary approaches to protein-ligand docking typically use a real-value encoding and mutation operators based on Gaussian and Cauchy distributions. The choice of mutation is important for an ... [more ▼]

Evolutionary approaches to protein-ligand docking typically use a real-value encoding and mutation operators based on Gaussian and Cauchy distributions. The choice of mutation is important for an efficient algorithm for this problem. We investigate the effect of mutation operators by locality analysis. High locality means that small variations in the genotype imply small variations in the phenotype. Results show that Gaussian-based operators have stronger locality than Cauchy-based ones, especially if an annealing scheme is used to control the variance. [less ▲]

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See detailA Generic Weaver for supporting Product Lines
Morin, Brice; Klein, Jacques UL; Barais, Olivier et al

in Early Aspects Workshop at E (2008)

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See detailDesigning convivial digital cities
Caire, Patrice UL

in AI & Society (2008)

Detailed reference viewed: 39 (0 UL)
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See detailA web-based quality control system for assessment processes
Busana, Gilbert UL; Koenig, Vincent UL; Martin, Romain UL et al

in International Journal of Psychology (2008), 43

Detailed reference viewed: 87 (1 UL)
See detailTransmission of values and intergenerational Solidarity in Luxembourg
Michels, Tom UL; Albert, Isabelle UL; Ries, Thierry et al

in Presented at the 4th Congress of the European Society on Family Relations. Jyväskylä, Finland. (2008)

Detailed reference viewed: 68 (2 UL)
See detailComputer-Based School System Monitoring with Feedback to Teachers
Plichart, P.; Busana, Gilbert UL; Martin, Romain UL et al

in Proceedings of World Conference on Educational Multimedia, Hypermedia and Telecommunications (2008)

Educational multimedia focuses traditionally on the design of computer aided learning environments. Evaluation has to be viewed as an essential part of the learning environment. Beyond opportunities ... [more ▼]

Educational multimedia focuses traditionally on the design of computer aided learning environments. Evaluation has to be viewed as an essential part of the learning environment. Beyond opportunities provided by its computerization (behaviours tracking, richer interactions, etc.), Computer Based Assessment provides teachers a measurement instrument where their students are put together with larger groups of students on the same assessment scale, using a unique competency model. It provides feedback to teachers that enable them to early detect shortcomings of their courses, pedagogical approach. ICT provides in this case a flexible way for the results collection, feedback reporting raising strengths and weaknesses, assurance of anonymity, data privacy. Moreover, it would give decision makers of the educational system information on the educational system steering efficiency. This paper describes ongoing assessment based on the TAO platform with feedback to teachers done in Luxembourg. [less ▲]

Detailed reference viewed: 78 (0 UL)
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See detailTAO: Paving the Way New Assessment Instruments using an open and versatile Computer-Based Platform
Latour, Thibaud; Martin, Romain UL; Plichart, P. et al

in International Journal of Psychology (2008), 43

Detailed reference viewed: 93 (0 UL)
See detailCapacity and Gain Analysis of a Reconfigurable MEMS Antenna
Mowlér, Marc; Khalid, Bilal; Lindmark, Björn et al

in Nordic Conference on Radio Science and Communications (RVK) (2008)

Detailed reference viewed: 121 (0 UL)
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See detailStress: a second chance to consolidate your first impression
Schächinger, H.; Philippsen, C.; Oitzl, M. S. et al

in Abstracts - Society for Neuroscience (2008), 38

Detailed reference viewed: 76 (0 UL)
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See detailDirect gaze of photographs of female nudes influences startle in men
Lass-Hennemann, J.; Schulz, André UL; Nees, F. et al

in Abstracts - Society for Neuroscience (2008), 38

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See detailA nation-wide, computer-based school monitoring program
Keller, Ulrich UL; Brunner, Martin UL; Martin, Romain UL et al

in International Journal of Psychology (2008), 43(3/4), 860-862

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See detailDoppler-variant Modeling of the Vocal Tract: Stability Considerations
Heim, Axel; Sorger, Ulrich UL

in Proceedings of 8th ITG Conference on Speech Communication (2008)

A common technique to deploy linear prediction to non-stationary signals is time segmentation and local analy-sis. In [1], the temporal changes of linear prediction coef?cients (LPCs) are modeled as a ... [more ▼]

A common technique to deploy linear prediction to non-stationary signals is time segmentation and local analy-sis. In [1], the temporal changes of linear prediction coef?cients (LPCs) are modeled as a Fourier series. This allows analysis and optimization of larger speech segments, i.e., virtually global analysis. Possibly resulting non-minimum-phase prediction error polynomials are subject to all-pass ?ltering. We show that introducing the stabilizing ?lter does not deteriorate the overall predictor performance. [less ▲]

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See detailDoppler-Variant Modeling of the Vocal Tract
Heim, Axel; Sorger, Ulrich UL; Hug, Florian

in Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing (2008)

A common technique to deploy linear prediction to non-stationary signals is time segmentation and local analysis. Variations of a process within such a segment cause inaccuracies. In this paper, we model ... [more ▼]

A common technique to deploy linear prediction to non-stationary signals is time segmentation and local analysis. Variations of a process within such a segment cause inaccuracies. In this paper, we model the temporal changes of linear prediction coef?cients (LPCs) as a Fourier series. We obtain a compact description of the vocal tract model limited by the predictor order and the maximum Doppler frequency. Filter stability is guaranteed by all-pass ?ltering, deploying the human ear?s insensitivity to absolute phase. The periodicity constraint induced by the Fourier series is counteracted by oversampling in the Doppler domain. With this approach, the number of coef?cients required for the vocal tract modeling is signi?cantly reduced compared to a LPC system with block-wise adaptation while exceeding its prediction gain. As a by-product it is found that the Doppler frequency of the vocal tract is in the order of 10 Hz. A generalization of the algorithm to an auto-regressive moving average model with time-correlated ?lter coef?cients is straight forward. [less ▲]

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See detailTurbo Decoding: Why Stopping Criteria do Work
Heim, Axel; Sorger, Ulrich UL

in Proceedings of 5th International Symposium on Turbo Codes & Related Topics (2008)

The convergence of iterative decoding schemes is considered. The class of dually coupled codes is recalled, being a super class to both Turbo and LDPC codes. It is proven that the output L-values of a ... [more ▼]

The convergence of iterative decoding schemes is considered. The class of dually coupled codes is recalled, being a super class to both Turbo and LDPC codes. It is proven that the output L-values of a Turbo decoder cannot grow to in?nity, while those of an LDPC decoder can. Finally, a new decoder parameter is introduced by which the convergence behavior can be controlled. [less ▲]

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See detailComputation of Moments in the Trellis
Heim, Axel; Sidorenko, Vladimir; Sorger, Ulrich UL

in Proceedings of IEEE International Symposium on Information Theory (2008)

Decisions on sources with memory transmitted over independent channels can be taken by employing trellis calculations. In this paper, it is shown that for a certain class of functions their moments can be ... [more ▼]

Decisions on sources with memory transmitted over independent channels can be taken by employing trellis calculations. In this paper, it is shown that for a certain class of functions their moments can be computed in the trellis, too. This is done by generalizing the forward/backward recursion known from the BCJR algorithm [1]. In analogy to the symbol probabilities, by introducing a constraint at a certain depth in the trellis we obtain symbol moments. These moments are required for an ef?cient implementation of the discriminated belief propagation algorithm in [2], and can furthermore be utilized to compute conditional entropies in the trellis. The moment computation algorithm has the same asymptotic complexity as the BCJR algorithm. It is applicable to any commutative semi-ring, thus also providing a generalization of the Viterbi algorithm [3]. [less ▲]

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See detailAnchoring effects in teachers' assessments of student performance: An experimental study with novices and experts in teaching
Dünnebier, Kathrin; Nölle, Ines; Krolak-Schwerdt, Sabine UL

in International Journal of Psychology (2008), 43

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See detailAntidepressive therapy with escitalopram improves mood, cognitive symptoms, and identity memory for angry faces in elderly depressed patients
Savaskan, E.; Müller, S.; Böhringer, A. et al

in European Psychiatry (2008), 23(Supplement 2), 206-206

Detailed reference viewed: 128 (0 UL)
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See detailThe relationship between state, religions and school in Luxembourg. On the problematic situation of management of pluralism in today’s societies.
Meyers, Christian UL

in Citizenship multiculturalism cosmopolitanism: proceedings from the international conference, University of Cyprus, Nicosia, 3-4 November 2007, Volume 1 (2007, November)

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See detailOn quantum and classical Poisson algebras
Grabowski, Janusz; Poncin, Norbert UL

in Banach Center Publications (2007), 76

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See detailDynamiques territoriales et marché du travail : le rôle du travail frontalier dans l'espace Saar-Lor-Lux
Belkacem, Rachid; Borsenberger, Monique; Pigeron-Piroth, Isabelle UL

in Les dynamiques territoriales : débats et enjeux des différents approches disciplinaires (2007)

The aim of this paper is to analyse the reasons for the rapid development of cross-border work in the geographic space named “Great Region” or “Saar-Lor-Lux area”, a geographical sphere in the middle of ... [more ▼]

The aim of this paper is to analyse the reasons for the rapid development of cross-border work in the geographic space named “Great Region” or “Saar-Lor-Lux area”, a geographical sphere in the middle of continental Europe composed of several regional areas (Lorraine in France, Wallonie in Belgium, Rhénanie-Palatinat and Sarre in Germany) and one state (the Great Duchy of Luxembourg). The cross-border work is analysed as a regulation factor of these regional labor markets. A specific socio-economical context and the definition of national and supranational statutory frameworks favor its development. These differences in social and economic development of the concerned geographical areas favor the growth of cross-border work. It allows to make up for manpower shortages in some economic activity sectors and to remedy the problems related to qualifications. [less ▲]

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See detailDevelopment of Light Concrete Bricks with Improved Heat-Insulating Properties
Leufgens, Nadine UL; Waldmann, Danièle UL; Maas, Stefan UL et al

in Proceedings of the third Scottish Conference for Postgraduate Researchers of the Built & Natural Environment – ProBE 2007 (2007)

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See detailAdding Roles to Relationship Patterns
Baldoni, Matteo UL; Boella, Guido UL; van der Torre, Leon UL

in Proceedings of WOA07 (2007)

In this paper we study how roles can be added to patterns modelling relationships in Object Oriented programming, and which new relationship patterns can be introduced using roles. Relationships can be ... [more ▼]

In this paper we study how roles can be added to patterns modelling relationships in Object Oriented programming, and which new relationship patterns can be introduced using roles. Relationships can be introduced in programming languages either by reducing them to attributes of the objects which participate in the relationship, or by modelling the relationship itself as a class whose instances have the participants of the relationships among their attributes. However, even if roles have been recognized as an essential component of relationships, also in modelling languages like UML, they have not been introduced in Object Oriented programming when it is necessary to model relationships. Introducing roles allows to add attributes and behaviors to the participants in the relationship, rather than to the relationship itself, and to distinguish natural types as classes participating in the relationships from the roles the participants acquire in the relationships. In this paper we show how the role model proposed in powerJava can be used to endow relationships with roles, both in the relationship as attribute and in the relationship object pattern. Finally, since these patterns have different advantages and limitations, we propose a third pattern based on roles which benefits from the advantages of the two previous patterns when modelling relationships. [less ▲]

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See detailPotenzial für Energieoptimierungen auf Kläranlagen in Rheinland-Pfalz
Hansen, Joachim UL

in Tagungsband Ökoeffizienz in der Wasserwirtschaft - Schwerpunkt Energieoptimierung von Kläranlagen (2007), 26

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See detailHealth status among French, Polish and Romanian students
Baumann, Michèle UL; Le Bihan, Etienne UL; Amara, Marie-Emmanuelle UL et al

in Health Psychology and Society. Congressboock (2007)

Research question. Students face many school and living difficulties which alter health status and favour substance use which were assessed in this study among university students from France, Poland and ... [more ▼]

Research question. Students face many school and living difficulties which alter health status and favour substance use which were assessed in this study among university students from France, Poland and Romania. Methods. In total 934 French, 480 Polish, and 195 Romanian students from the Universities of Metz, Iaşi, and Silésie, completed a self-administred questionnaire. The data were analyzed using adjusted odds ratios (OR) and variance analysis taking age and sex into account, vs. French. Results. Mean age 20 (SD = 2) years. Female represented 58% French and 80% Polish/Romanian. Although most students were satisfied with their university integration (81-97%), many students had deteriorated heath status compared with the period before the university (13-22%), suffered from tiredness (11-85%), nervousness (42-56%), sleep disorders (19-48%), financial difficulty (15-39%), and being alone (8-23%). Were also common increasing tobacco use (15-32%), alcohol use every day (15-40%), tranquilizer pill use (1-6%), hashish/marijuana use (2-42%), suicide thinking (15-19%), and frequent consultation of health professionals (7-30%). Bad heath status was more frequent among French and Romanian overall, and suicide thinking among Polish. Higher PSS-14 and GHQ-12 scores among Polish compared with their French counterparts who used more hashish/marijuana. Satisfied social support was similar between the three groups. Conclusion. A better guidance for those who are in need of adapted mental health care seem nevertheless recommended to support them through their university success. [less ▲]

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See detailRobust H∞ Filtering for a Class of Uncertain Nonlinear Stochastic Time-delay Systems
Li, Yumei UL; Guan, Xinping

in Control Science and Engineering : Academic Forum of China PHD Students (2007)

The paper investigates a robust H∞ filtering design problem for a class of uncertain nonlinear stochastic time-delay system with state and exogenous disturbance-dependent noise. Assume the parameter ... [more ▼]

The paper investigates a robust H∞ filtering design problem for a class of uncertain nonlinear stochastic time-delay system with state and exogenous disturbance-dependent noise. Assume the parameter uncertainty is norm-bounded and the system dynamic is modeled by Ito-type stochastic differential equations. The aim of this work is to design a linear, delayless, uncertainties independent state estimator such that for all admissible uncertainties as well as exogenous disturbances, the dynamics of the estimation error is stochastically exponential stable in mean square and independent of the time-delay. Sufficient conditions are proposed to guarantee the existence of desired robust H∞ filtering via linear matrix inequalities (LMI). Numerical example is presented to demonstrate the effectiveness of the proposed approaches. [less ▲]

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See detailThe Influence of Central Alpha2-Adrenoreceptor Agonism and Antagonism on the Cardiac Modulation of Acoustic Startle
Schulz, André UL; Philippsen, C.; Schächinger, H.

in Psychophysiology (2007), 44(Supplement 1), 29-29

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See detailRoles in Coordination and in Agent Deliberation: A Merger of Concepts
Baldoni, Matteo UL; Boella, Guido UL; Genovese, Valerio UL et al

in Proceedings of AWESOME07 (2007)

In this paper we generalize and merge two models of roles used in multiagent systems which address complementary aspects: enacting roles and communication among roles in an organization or institution. We ... [more ▼]

In this paper we generalize and merge two models of roles used in multiagent systems which address complementary aspects: enacting roles and communication among roles in an organization or institution. We do this by proposing a metamodel of roles and specializing the metamodel to fit two existing models. We show how the two approaches can be integrated since they deal with complementary aspects: [1] focuses on roles as a way to specify interactions among agents, and, thus, it emphasizes the public character of roles. [2] focuses instead on how roles are played, and thus it emphasizes the private aspects of roles: how the beliefs and goals of the roles become the beliefs and goals of the agents. The former approach focuses on the dynamics of roles in function of the communication process. The latter approach focuses on the internal dynamics of the agents when they start playing a role or shift the role they are currently playing. [less ▲]

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See detailWhat You should Believe
Boella, Guido UL; Pereira, Célia Da Costa UL; Pigozzi, Gabriella UL et al

in Proceedings of The 19th Belgian-Dutch Conference on Artificial Intelligence (BNAIC 2007) (2007)

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See detailStability Criteria for Clusterhead Selection in Mobile Ad-hoc Networks
Brust, Matthias R. UL; Andronache, Adrian UL; Rothkugel, Steffen UL et al

in Proceedings of International Conference on Wireless and Information Technology (CEWIT 2007) (2007)

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See detailImprovement of Load Bearing Capacity in Design of Anchor Plates with Headed Shear Studs in Concrete Columns
Odenbreit, Christoph UL; Fromknecht, Stephan

in 2nd International Symposium on Connections between Steel and Concrete (2007)

A typical constructional solution for load bearing elements at the intersection between steel and concrete in high-rise- as well as multi-storey-buildings is the anchor plate in steel. Tests on the ... [more ▼]

A typical constructional solution for load bearing elements at the intersection between steel and concrete in high-rise- as well as multi-storey-buildings is the anchor plate in steel. Tests on the positive effects of reinforcement in constructions with small edge distances such as columns and wall edges show that the design solutions still can be improved compared to the regulations in technical approvals. The ambition of this research is the determination of the load flux between anchor plate, concrete and reinforcement, improved design and use of shear/tension hanger reinforcement, reduction of allowable edge distances and increase of allowable load in combination with reinforcement. Tests with different topologies of anchor plates and concrete structures were conducted. Explored are the ultimate forces in correlation to edge distance, anchorage reinforcement and load eccentricity. These forces are compared to ultimate allowable forces which are calculated according to current technical approvals for headed studs. [less ▲]

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See detailCorrelation properties of large scale fading based on Indoor measurements
Jaldén, Niklas; Hong, Aihua; Zetterberg, Per et al

in IEEE Wireless Communications and Networking Conference (2007)

Statistical channel models are attractive for their simplicity but sometimes lack in precision. In to improve modelling accuracy, statistical model parameters, which are dependent on the environment, are ... [more ▼]

Statistical channel models are attractive for their simplicity but sometimes lack in precision. In to improve modelling accuracy, statistical model parameters, which are dependent on the environment, are extended to include spatial and temporal correlation. In outdoor scenarios these parameters are assumed constant over large areas of several wavelengths hence the name large scale parameters. This paper studies the large scale fading (LSF) and the applicability of bringing this previously used outdoor variable to the indoor case. The impacts of the model of the LSF on the outdoor system-performance have been studied and several relevant models have been proposed for outdoor cases. We present the intra-site autocorrelation as well as the inter-site cross correlation of the LSF for an indoor channel. The results are based on two separate measurement campaigns conducted at KTH, Stockholm and TUI, Ilmenau, using a single mobile station (MS) and multiple base stations (BSs) to investigate such models. We observe that the areas under which the LSF could be assumed constant are, in indoor scenarios, so small that it can be assumed independent from one local area to another. Furthermore, we find results that point towards the existence of inter-site correlation in some specific scenarios. [less ▲]

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See detailAspects of Steel Structures in Marine Environment including Corrosion Using Eurocode 3 and National Annex
Oke, Ashwini; Odenbreit, Christoph UL

in Aspects of Steel Structures in Marine Environment including Corrosion Using Eurocode 3 and National Annex (2007)

Steel structures in the marine environment like Steel Sheet Pile walls at quays and harbors, undergo continuous corrosion subjected to prolong sea water environment. The design of these steel structures ... [more ▼]

Steel structures in the marine environment like Steel Sheet Pile walls at quays and harbors, undergo continuous corrosion subjected to prolong sea water environment. The design of these steel structures currently is been practiced by using respective national annexure in alliance with the Eurocodes. But the correct statistical properties which fit into the semi-probabilistic safety concept of the Eurocodes still have to be determined. Steel Sheet pile retaining walls will obligatorily be analyzed according to the Eurocodes on and after the year 2010 [1]. Eurocodes 1 and 3 for load assumptions and structural steel design are introduced to various countries by building authorities even now. The work on Eurocodes 1997-1:2004 has been recently completed; to focus on the harmonization of all the national annexures and an economical design of steel sheet piles must guaranteed remain. The current paper highlights mainly upon the difference in the design aspects with special consideration to the usage of partial safety factor dealt in the Eurocodes, versus using initial practice of the respective national annexure and various geotechnical factors affecting the same. Analytical examples of typical cross sections of sheet piles will be evaluated using annexure and in conjunction with Eurocode and FEM packages. [less ▲]

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See detailCorrelation between stiffness of composite connections and adjacent composite beam
Odenbreit, Christoph UL; Hahn, Christoph

in 2nd International Symposium on Connections between Steel and Concrete (2007)

In the last years composite structures got more and more important for office as well as high rise buildings. Many test programs where started to study the load bearing behavior of these structures. This ... [more ▼]

In the last years composite structures got more and more important for office as well as high rise buildings. Many test programs where started to study the load bearing behavior of these structures. This paper concentrates on the stiffness behaviour of composite connections, the connecting link between beams or column and beam. The presented analysing model aims in determining the stiffness of composite connections in a practical manner. Therefore a new variable – the non-dimensional spring stiffness – is introduced. The non-dimensional stiffness is a characteristic value for one kind of composite connections, for example joints with endplates or joints with fins. The determination of the non-dimensional stiffness is based on the evaluation of 59 test results. [less ▲]

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See detailFull Diversity Detection in MIMO Systems with a Fixed-Complexity Sphere Decoder
Jaldén, Joakim; Barbero, Luis G.; Ottersten, Björn UL et al

in Proceedings IEEE International Conference on Acoustics, Speech, and Signal Processing (2007)

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See detailReusable Aspect Models
Klein, Jacques UL; Kienzle, Jörg

in Abstract book of 11th Workshop on Aspect Oriented Modeling, AOM at Models’07 (2007)

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See detailL'énergie éolienne en Allemagne entre succès et opposition
Helfer, Malte UL

in Actes du Festival International de Géographie du 4 au 7 octobre 2007, La planète en mal d’énergies, St. Dié (2007)

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See detailEstimating partner abuse in primary care
Lygidakis, Charilaos UL; Argyriadou, Stella; Lygera, Anastasia et al

in European Journal of General Practice (2007), 13(4), 263

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See detailSpaces - A Replication Scheme for Sharing Tagged Files in Hybrid Wireless Networks
Wehling, Ulf; Rothkugel, Steffen UL

in International Conference on Mobile Ubiquitous Computing, Systems, Services and Technologies (UBICOMM 2007) (2007)

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See detailUbiSettlers-A Dynamically Adapting Mobile P2P Multiplayer Game for Hybrid Networks
Hiedels, Christian UL; Hoff, Christian; Rothkugel, Steffen UL et al

in Abstract book of 4th IEEE International Workshop on Mobile Peer-to-Peer Computing (MP2P 2007) (2007)

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See detailDo male and female adolescents differ in the effect of individual and family characteristics on their use of psychotropic drugs?
Spitz, E.; Chau, N.; Predine, R. et al

in Abstract book of 10th European Congress of Psychology (2007)

Objectives. To assess the effects of individual and family characteristics on psychotropic drug use among male and female adolescents. Design and methods. The sample included 2,396 subjects attending two ... [more ▼]

Objectives. To assess the effects of individual and family characteristics on psychotropic drug use among male and female adolescents. Design and methods. The sample included 2,396 subjects attending two middle schools and two high schools. Respondents completed self-administered questionnaires covering gender, age, body mass index, smoking, alcohol use, illicit drug use, tiredness during the daytime, self-reported personality traits, family conditions, and psychotropic drug use. The data were analyzed using logistic models. Results. The prevalence of frequent psychotropic drug use (for headache, tiredness, nervousness/anxiety, insomnia) was 43.0% overall; twice as high among girls than boys. In girls, frequent psychotropic drug use was associated with frequent tiredness during the daytime (adjusted odds ratio OR 2.03, 95%CI 1.61-2.57), smoking (2.02, 1.50-2.71), alcohol use (1.34, 1.04-1.74), higher body mass index (18 kg/m2, 1.54, 1.16-2.04), poor family atmosphere (1.33, 1.03-1.72), and being worried (1.93, 1.53-2.43) or easily becoming irritable (1.28, 1.01-1.62). In boys the factors with significant ORs were frequent tiredness during the daytime (2.21, 1.67-2.93), alcohol use (1.52, 1.15-2.01), and being worried (1.70, 1.28-2.26) or easily becoming irritable (1.42, 1.06-1.89); univariate analysis revealed a significant relationship with smoking and family atmosphere. An association was also observed for illicit drug in both sexes and for age17 years in girls. Conclusions. Individual and family characteristics have marked influences on psychotropic drug use among both male and female adolescents. This finding may be useful for the psychologists, the physicians, the parents and the school staff to be more aware of the risks and to find remedial measures. [less ▲]

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See detailChoosing Your Beliefs
Boella, Guido UL; Pereira, Célia Da Costa UL; Pigozzi, Gabriella UL et al

in Normative Multi-agent Systems (2007)

This paper presents and discusses a novel approach to indeterministic belief revision. An indeterministic belief revision operator assumes that, when an agent is confronted with a new piece of information ... [more ▼]

This paper presents and discusses a novel approach to indeterministic belief revision. An indeterministic belief revision operator assumes that, when an agent is confronted with a new piece of information, it can revise its belief sets in more than one way. We define a rational agent not only in terms of what it believes but also of what it desires and wants to achieve. Hence, we propose that the agent's goals play a role in the choice of (possibly) one of the several available revision options. Properties of the new belief revision mechanism are also investigated. [less ▲]

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See detailBreaking the silence – Mortality salience, state anxiety and coping strategies in the context of cancer
Hoffmann, Martine UL; Ferring, Dieter UL

in Abstract paper of the Annual Conference of the Canadian Association of Psychosocial Oncology. Winnipeg, Canada (2007)

Detailed reference viewed: 47 (1 UL)
See detailWillingness to support the elderly: The view of adult children and the elderly
Ries, Thierry UL; Ferring, Dieter UL

in Abstract paper of the XXIX International Congress of Psychology. Berlin, Germany (2007)

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See detailSANA - Network Protection through artificial Immunity
Hilker, Michael UL; Schommer, Christoph UL

in Abstract book of 2nd International Workshop on Theory of Computer Viruses (TCV 2007) (2007)

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See detailMechanical failure in microstructural heterogeneous materials
Bordas, Stéphane UL; Hoppe, R. H. W.; Petrova, S. I.

in Lecture Notes in Computer Science (2007), 4310 LNCS

Various heterogeneous materials with multiple scales and multiple phases in the microstructure have been produced in the recent years. We consider a mechanical failure due to the initiation and ... [more ▼]

Various heterogeneous materials with multiple scales and multiple phases in the microstructure have been produced in the recent years. We consider a mechanical failure due to the initiation and propagation of cracks in places of high pore density in the microstructures. A multi-scale method based on the asymptotic homogenization theory together with the mesh superposition method (s-version of FEM) is presented for modeling of cracks. The homogenization approach is used on the global domain excluding the vicinity of the crack where the periodicity of the microstructures is lost and this approach fails. The multiple scale method relies on efficient combination of both macroscopic and microscopic models. The mesh superposition method uses two independent (global and local) finite element meshes and the concept of superposing the local mesh onto the global continuous mesh in such a way that both meshes not necessarily coincide. The homogenized material model is considered on the global mesh while the crack is analyzed in the local domain (patch) which allows to have an arbitrary geometry with respect to the underlying global finite elements. Numerical experiments for biomorphic cellular ceramics with porous microstructures produced from natural wood are presented. [less ▲]

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See detailOn the Integration of Mobility in a Fault-Tolerant e-HealthWeb Information System
Balbastro, Florencia; Capozucca, Alfredo UL; Guelfi, Nicolas UL

in Advanced Information Networking and Applications Workshops, 2007, AINAW '07. 21st International Conference on (Volume:2 ) (2007)

The e-health domain has for objective to assist and manage citizens health. It concerns many actors like patient, doctors, hospitals and administration. Current and forthcoming generations of application ... [more ▼]

The e-health domain has for objective to assist and manage citizens health. It concerns many actors like patient, doctors, hospitals and administration. Current and forthcoming generations of application will be web based and will integrate more and more mobile devices. In such application domain, dependability is a key notion. This paper presents, through a case study, how we can develop an application that controls the insulin injection and that is embedded in a mobile device belonging to an e-health Web Information System (WIS). In order to ensure the dependability of the control systems, we show how to use Coordinated Atomic Actions (CAA). In order to implement our design, we explain how to use a development framework that we have made to implement CAA, which originally was not tailored for mobile fault-tolerant applications. Thus, in this paper, we also explain how we have adapted and used CAA-DRIP for mobile devices. [less ▲]

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See detailFIPA Communicative Acts in Defeasible Logic
Boella, Guido UL; Hulstijn, Joris UL; Governatori, Guido UL et al

in Proceedings of NRAC'07 (2007)

In agent communication languages, the inferences that can be made on the basis of a communicative action are inherently conditional, and non-monotonic. For exam- ple, a proposal only leads to a commitment ... [more ▼]

In agent communication languages, the inferences that can be made on the basis of a communicative action are inherently conditional, and non-monotonic. For exam- ple, a proposal only leads to a commitment, on the con- dition that it is accepted. And in a persuasion dialogue, assertions may later be retracted. In this paper we there- fore present a defeasible logic that can be used to express a semantics for agent communication languages, and to efficiently make inferences on the basis of communica- tive actions. The logic is non-monotonic, allows nested rules and mental attitudes as the content of communica- tive actions, and has an explicit way of expressing per- sistence over time. Moreover, it expresses that mental attitudes are publicly attributed to agents playing roles in the dialogue. To illustrate the usefulness of the logic, we reformalize the meta-theory underlying the FIPA se- mantics for agent communication, focusing on inform and propose. We show how composed speech acts can be formalized, and extend the semantics with an account of persuasion [less ▲]

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See detailGrandparents and Grandchildren: Relationship Quality and Perceived Support
Michels, Tom UL; Ferring, Dieter UL

in Abstract book of 13th European Conference on Developmental Psychology (2007)

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See detailRespiratory muscle tension as a determinant of breathlessness in individuals with high and low anxiety sensitivity
Petersen, Sibylle UL; Bhaskara, Lavanya; Seger, C. et al

in Psychophysiology (2007), 44

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See detailAssociations between multiple deprivation and tobacco, alcohol, and psychotropic drug use
Baumann, Michèle UL; Spitz, E.; Chau, N.

in Proceedings of 10th European Congress
of Psychology
(2007)

Objectives. To assess the relationships of multiple deprivation and gender differences towards tobacco, alcohol and psychotropic drug use. Design and methods. The sample included 6,216 subjects, aged 15 ... [more ▼]

Objectives. To assess the relationships of multiple deprivation and gender differences towards tobacco, alcohol and psychotropic drug use. Design and methods. The sample included 6,216 subjects, aged 15 years, randomly selected in north-eastern France who completed a mailed questionnaire. Data were analyzed with the logistic model. Results. Multiple deprivation (noted MD, defined by the cumulative number of: low educational level, manual worker, unemployment, living alone, nationality (other than Western Europe), low income, and non-home-ownership) concerned many people: 37.4% for MD1, 21.2% for MD2, 10.0% for MD≥3. Tobacco and excess alcohol use was more frequent in men than in women (30.2% vs. 21.9%, 12.5% vs. 3.3%, p<0.001) contrarily to frequent psychotropic drug use (for headache, tiredness, nervousness/anxiety, insomnia, 23.8% vs. 41.0%, p<0.001). The MD was strongly related to tobacco use (odds ratio 1.16, 95%CI 1.00-1.34 for MD1; 1.49, 1.27-1.74 for MD2; 1.93, 1.59-2.35 for MD≥3; vs. MD0) as well as to excess alcohol use (1.19, 0.94-1.52 for MD1; 1.32, 1.01-1.73 for MD2; 1.80, 1.32-2.46 for MD≥3; vs. MD0) and to frequent psychotropic drug use (1.26, 1.11-1.44 for MD1; 1.51, 1.30-1.75 for MD2; 1.91, 1.58-2.30 for MD≥3; vs. MD0). Marked relationships were observed between the MD and the use of those substances in active/non-retired inactive men and women (except for excess alcohol use in female). In retired people, the MD was associated with tobacco and psychotropic use in men only. Conclusion. Multiple deprivation may favour tobacco, alcohol and psychotropic drug use. The psychologists may find gender differences remedial measures. [less ▲]

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See detailOn The Road Towards The Comprehension Of The Internet Traffic Behavior: Simulation And Analysis Of An End-To-End Connection With NS-2
Sorger, Ulrich UL; Melakessou, Foued UL; Suchanecki, Zdzislaw UL

in Abstract book of 10th Communications and Networking Simulation Symposium CNS'07 (2007), (Proceedings of the 10th Communications and Networking Simulation Symposium CNS'07 Norfolk Marriott Waterside, Norfolk, VA, USA, March 25 - 29, 2007),

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See detailTen Philosophical Problems in Deontic Logic
Hansen, Jörg UL; Pigozzi, Gabriella UL; van der Torre, Leon UL

in Normative Multi-agent Systems (2007)

The paper discusses ten philosophical problems in deontic logic: how to formally represent norms, when a set of norms may be termed `coherent', how to deal with normative conflicts, how contrary-to-duty ... [more ▼]

The paper discusses ten philosophical problems in deontic logic: how to formally represent norms, when a set of norms may be termed `coherent', how to deal with normative conflicts, how contrary-to-duty obligations can be appropriately modeled, how dyadic deontic operators may be redefined to relate to sets of norms instead of preference relations between possible worlds, how various concepts of permission can be accommodated, how meaning postulates and counts-as conditionals can be taken into account, and how sets of norms may be revised and merged. The problems are discussed from the viewpoint of input/output logic as developed by van der Torre Makinson. We argue that norms, not ideality, should take the central position in deontic semantics, and that a semantics that represents norms, as input/output logic does, provides helpful tools for analyzing, clarifying and solving the problems of deontic logic. [less ▲]

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See detailCollaborative Filtering in Artefact-based m-Learning Environments
Hoff, Christian; Gratz, Patrick UL; Rothkugel, Steffen UL

in International Workshop on Mobile and Ubiquitous Learning Environments (MULE 2007) held in conjunction with 15th International Conference on Computers in Education (ICCE 2007) (2007)

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See detailDamage Assessment of Civil Engineering Structures by the Observation of Non-linear Dynamic Behaviour
Waltering, Markus UL; Bungard, Volker UL; Waldmann, Danièle UL et al

in Proceedings of the International Conference on Experimental Vibration Analysis for Civil Engineering Structures (2007)

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See detailA Normative Multi-Agent Systems Approach to the Use of Conviviality for Digital Cities
Caire, Patrice UL

in Coordination, Organizations, Institutions, and Norms in Agent Systems III (2007)

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See detailAn Intelligent Visualization and Decision Support System for decentralized Wastewater Treatment Plants.
Wölle, J.; Steinmetz, H.; Hansen, Joachim UL et al

in Advanced Sanitation Conference, 12./13.03.2007 Aachen. (2007)

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See detailA Certified Email Protocol Using Key Chains
Cederquist, J.; Dashti, M. Torabi; Mauw, Sjouke UL

in Proceedings of the 21st International Conference on Advanced Information Networking and Applications Workshops - Volume 01 (AINAW'07) (2007)

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See detailRaman spectroscopy on single- and few-layer graphene
Graf, Davy; Molitor, Francoise; Ensslin, Klaus et al

in AIP Conference Proceedings (2007), 893

We report on Raman measurements of single- and few-layer graphene flakes. Raman mapping in combination with scanning force microscopy allows us to locally relate the thickness of the graphite flake with ... [more ▼]

We report on Raman measurements of single- and few-layer graphene flakes. Raman mapping in combination with scanning force microscopy allows us to locally relate the thickness of the graphite flake with the spectral properties. It turns out that the width of the D' line is highly sensitive to the transition from single- to double-layer graphene. The defect-induced D line is found to be most prominent at steps between sections of different height and along the edge of the graphite flake. [less ▲]

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See detailAbsorption of BN nanotubes under the influence of a perpendicular electric field
Attaccalite, Claudio; Wirtz, Ludger UL; Marini, Andrea et al

in Physica Status Solidi B. Basic Research (2007), 244(11), 4288-4292

We calculate the optical absorption spectra of prototype (6,6) and (9,9) BN nanotubes in the presence of a perpendicular electric field. This model mimics a gated BN nanotube device. Even though the band ... [more ▼]

We calculate the optical absorption spectra of prototype (6,6) and (9,9) BN nanotubes in the presence of a perpendicular electric field. This model mimics a gated BN nanotube device. Even though the band-gap of the tubes decreases strongly as a function of the electric field strength, the absorption spectrum of the pure tubes remains remarkably constant up to high field-strength. We show that, in contrast, the levels which are responsible for defect-mediated photo-luminescence are shifted by the electric field. We address the use of BN nanotubes for optoelectronic applications. 0 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. [less ▲]

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See detailDistinguishing Propositional and Action Commitment in Agent Communication
Boella, Guido UL; Damiano, R. UL; Hulstijn, Joris UL et al

in Proceedings of CMNA'07 (2007)

Our goal is to extend agent communication lan- guages for persuasion dialogues. We distinguish action commitments from propositional commit- ments, because both limit future moves, but an action ... [more ▼]

Our goal is to extend agent communication lan- guages for persuasion dialogues. We distinguish action commitments from propositional commit- ments, because both limit future moves, but an action commitment is fulfilled when the hearer believes that the action is performed, whereas a propositional commitment is fulfilled only when the hearer concedes to the proposition – where con- cessions are the absence of a belief to the con- trary, and prevent further challenges. Using a com- mon model for both kind of commitments and a role-based semantics of agent communication lan- guages, we show how propositional commitments are related to public beliefs and action commit- ments to public goals [less ▲]

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See detailLow energy quasiparticle dispersion of graphite by angle-resolved photoemission spectroscopy
Grueneis, A.; Pichler, T.; Shiozawa, H. et al

in Physica Status Solidi B. Basic Research (2007), 244(11), 4129-4133

The low energy electron dispersion in graphite is measured by angle-resolved photoemission spectroscopy. The measured photoemission intensity maxima are compared to a tight-binding calculation of the ... [more ▼]

The low energy electron dispersion in graphite is measured by angle-resolved photoemission spectroscopy. The measured photoemission intensity maxima are compared to a tight-binding calculation of the electronic band structure. We observe a strong trigonal warping of the equi-energy contour which is well reproduced by the calculations. Furthermore we clearly show that the concept of Dirac Fermions breaks down for AB stacked graphite. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. [less ▲]

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See detail„Wie du mir so ich dir!“ oder „Ehret das Alter!“ – Erwachsene Kinder und ihre alten Eltern
Ferring, Dieter UL

in Invited paper presented at the lecture series „Under construcion – Alter(n) in einer alternden Gesellschaft“. Universität Köln. (2007)

Detailed reference viewed: 61 (0 UL)