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See detailOptimizing communication satellites payload configuration with exact approaches
Stathakis, Apostolos UL; Danoy, Grégoire UL; Bouvry, Pascal UL et al

in Engineering Optimization (2015), 0(0), 1-26

Detailed reference viewed: 116 (23 UL)
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See detailOptimizing Distributed Collaborative Filtering in Mobile Networks
Gratz, Patrick UL; Andronache, Adrian UL

in Proceedings of the 2008 High Performance Computing & Simulation Conference (2008)

Collaborative filtering mechanisms filter information by using collaboration among multiple data sources, typically involving large data sets. In this work we optimize the communication and computational ... [more ▼]

Collaborative filtering mechanisms filter information by using collaboration among multiple data sources, typically involving large data sets. In this work we optimize the communication and computational load of a distributed collaborative filtering protocol designed to augment the information exchange in mobile networks. [less ▲]

Detailed reference viewed: 28 (0 UL)
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See detailOptimizing Multi-Objective Evolutionary Algorithms to Enable Quality-Aware Software Provisioning
El Kateb, Donia UL; Fouquet, François UL; bourcier, Johann et al

Scientific Conference (2014, October)

Detailed reference viewed: 101 (5 UL)
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See detailOptimizing Trading Decisions for Hydro Storage Systems using Approximate Dual Dynamic Programming
Löhndorf, Nils UL; Wozabal, David; Minner, Stefan

in Operations Research (2013)

Detailed reference viewed: 68 (2 UL)
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See detailOptimizing verification of structurally evolving algebraic petri nets
Khan, Yasir Imtiaz UL

in Software Engineering for Resilient Systems Lecture Notes in Computer Science Volume (2013, September 08), 8166

System models are subject to evolve during the development life cycle, along which an initial version goes through a series of evolutions, generally aimed at progressively reaching all the requested ... [more ▼]

System models are subject to evolve during the development life cycle, along which an initial version goes through a series of evolutions, generally aimed at progressively reaching all the requested qualities (completeness, correctness etc.). Among the existing development methodologies the iterative and incremental one has been proved to be efficient for system development but lacks of support for an adequate verification process. When considering Algebraic Petri nets (APNs) for modeling and model checking for verification, all the proofs must be redone after each iteration which is impractical both in terms of time and space. In this work, we introduce an Algebraic Petri net slicing technique that optimizes the model checking of static or structurally evolving APN models. Furthermore, our approach is proposing a classification of evolutions dedicated to the improvement of model checking. [less ▲]

Detailed reference viewed: 78 (8 UL)
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See detailOptimum stochastic modeling for GNSS tropospheric delay estimation in real-time
Hadas, Tomasz; Teferle, Felix Norman UL; Kazmierski, Kamil et al

in GPS Solutions (2016)

In GNSS data processing, the station height, receiver clock and tropospheric delay (ZTD) are highly correlated to each other. Although the zenith hydrostatic delay of the troposphere can be provided with ... [more ▼]

In GNSS data processing, the station height, receiver clock and tropospheric delay (ZTD) are highly correlated to each other. Although the zenith hydrostatic delay of the troposphere can be provided with sufficient accuracy, zenith wet delay (ZWD) has to be estimated, which is usually done in a random walk process. Since ZWD temporal variation depends on the water vapor content in the atmosphere, it seems to be reasonable that ZWD constraints in GNSS processing should be geographically and/or time dependent. We propose to take benefit from numerical weather prediction models to define optimum random walk process noise. In the first approach, we used archived VMF1-G data to calculate a grid of yearly and monthly means of the difference of ZWD between two consecutive epochs divided by the root square of the time lapsed, which can be considered as a random walk process noise. Alternatively, we used the Global Forecast System model from National Centres for Environmental Prediction to calculate random walk process noise dynamically in real-time. We performed two representative experimental campaigns with 20 globally distributed International GNSS Service (IGS) stations and compared real-time ZTD estimates with the official ZTD product from the IGS. With both our approaches, we obtained an improvement of up to 10% in accuracy of the ZTD estimates compared to any uniformly fixed random walk process noise applied for all stations. [less ▲]

Detailed reference viewed: 128 (1 UL)
See detailOptimum structure and equity in a city with local traffic-induced air pollution
Schindler, Mirjam UL

Scientific Conference (2015, November 12)

Traffic-induced air pollution causes environmental and health concerns, which affect households differently depending on where they live within the city and in turn influence residential choices ... [more ▼]

Traffic-induced air pollution causes environmental and health concerns, which affect households differently depending on where they live within the city and in turn influence residential choices. Contrasting spatial implications of environmental consciousness and valuation of local air quality as residential preferences, raises questions of equity in terms of evaluating responsibility for and exposure to air pollution within the city. With an analytical urban economics model, we aim at investigating the effects of households' perception of local air quality and different policies on the two-way interactions between the location of households and the distribution of pollution and, thus, on intra-urban equity. This work contributes to theoretical research by extending the standard urban economics model with endogenous local pollution externalities arising from passing traffic. A closed city equilibrium is solved analytically and comparative statics serve as impact analysis of various policies on intra-urban structure and equity. Further, first-best and second-best optimum city structures are defined and analysed with regard to distance-related equity concerns and their impact on the tension between environmental and health concerns due to air pollution from traffic. The different regimes are more beneficial in either reducing the generation of emissions or reducing the level of exposure across locations. Optimum structures improve equity across the city due to concentration of density in central and outer locations. Findings suggest that a cordon toll may approximate first-best structures well and be preferable over an urban growth boundary, since the latter fails to concentrate densification on central locations, as advised by the first-best. Residential preferences as well as regional and urban framework conditions play key roles in seeking optimum densities with respect to environmental, health and equity concerns of air pollution. [less ▲]

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See detailOptinization of wireless energy transfer for mid-range distances
Ripp, Pascal UL

Doctoral thesis (2017)

This thesis deals with the optimization of resonators for wireless power transfer by resonant magnetic coupling, where loosely coupled LC resonators are used for wireless power transmission. While systems ... [more ▼]

This thesis deals with the optimization of resonators for wireless power transfer by resonant magnetic coupling, where loosely coupled LC resonators are used for wireless power transmission. While systems that are currently available use discrete capacitors for frequency tuning, this work proposes self-resonating coils on a printed circuit board. For these coils, different three-dimensional (3D) Computer Aided Design (CAD) models are created and investigated using the method of finite elements. Finally, a set of inductively coupled and capacitively coupled self-resonant coils for the 6.78 MHz ISM band is found. Furthermore, the shielding of the coils with ferrite materials is discussed to maintain a high efficiency for any application. For both types, equivalent circuit models are derived and analyzed. Besides the coil optimization, a power amplifier is also proposed. During operation the optimal operational frequency is maintained by frequency tracking. The theoretical results are verified using a demonstrator circuit. [less ▲]

Detailed reference viewed: 78 (3 UL)
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See detailThe Optional Protocol to the Convention on the Rights of the Child on the Involvement of Children in Armed Conflict
Happold, Matthew UL

in Yearbook of International Humanitarian Law (2000), 3

Detailed reference viewed: 143 (0 UL)
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See detailLes options législatives prises par la Belgique, la France et le Luxembourg à l'occasion de la transposition de la directive "fusions transfrontalières"
Corbisier, Isabelle UL

in Conac, Pierre-Henri (Ed.) Fusions transfrontalières de sociétés - Droit luxembourgeois et droit comparé (2011)

Detailed reference viewed: 27 (4 UL)
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See detailOptoelectronic Analysis of Kesterite Based Solar Cells
Robert, Erika UL

Bachelor/master dissertation (2013)

Detailed reference viewed: 44 (4 UL)
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See detailOptoelectronic and Spectroscopic Characterization of Vapour-Transport Grown Cu2ZnSnS4 Single Crystals
Tat Ming Ng; Weller, Mark T.; Kissling, Gabriela P. et al

in Journal of Materials Chemistry A (2017)

Detailed reference viewed: 93 (2 UL)
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See detailOptoelectronic D.C. and R.F. behavior of InP/InGaAs Based HEMTs
Marso, Michel UL; Horstmann, M.; Hardtdegen, H. et al

in Solid-State Electronics (1998), 42(1998), 197-200

Detailed reference viewed: 11 (0 UL)
See detailOptoelectronic DC and RF behaviour of InAlAs/InGaAs based HEMTs at 1.3µm wavelength
Marso, Michel UL; Fox, A.; Förster, A. et al

in Proc. 3rd Asia-Pacific Conference on Communications, Sydney, Australia (1997)

Detailed reference viewed: 14 (0 UL)
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See detailoptPBN: An Optimisation Toolbox for Probabilistic Boolean Networks
Trairatphisan, Panuwat UL; Mizera, Andrzej UL; Pang, Jun UL et al

in PLoS ONE (2014), 9(7), 980011-15

Background There exist several computational tools which allow for the optimisation and inference of biological networks using a Boolean formalism. Nevertheless, the results from such tools yield only ... [more ▼]

Background There exist several computational tools which allow for the optimisation and inference of biological networks using a Boolean formalism. Nevertheless, the results from such tools yield only limited quantitative insights into the complexity of biological systems because of the inherited qualitative nature of Boolean networks. Results We introduce optPBN, a Matlab-based toolbox for the optimisation of probabilistic Boolean networks (PBN) which operates under the framework of the BN/PBN toolbox. optPBN offers an easy generation of probabilistic Boolean networks from rule-based Boolean model specification and it allows for flexible measurement data integration from multiple experiments. Subsequently, optPBN generates integrated optimisation problems which can be solved by various optimisers. In term of functionalities, optPBN allows for the construction of a probabilistic Boolean network from a given set of potential constitutive Boolean networks by optimising the selection probabilities for these networks so that the resulting PBN fits experimental data. Furthermore, the optPBN pipeline can also be operated on large-scale computational platforms to solve complex optimisation problems. Apart from exemplary case studies which we correctly inferred the original network, we also successfully applied optPBN to study a large-scale Boolean model of apoptosis where it allows identifying the inverse correlation between UVB irradiation, NFκB and Caspase 3 activations, and apoptosis in primary hepatocytes quantitatively. Also, the results from optPBN help elucidating the relevancy of crosstalk interactions in the apoptotic network. Summary The optPBN toolbox provides a simple yet comprehensive pipeline for integrated optimisation problem generation in the PBN formalism that can readily be solved by various optimisers on local or grid-based computational platforms. optPBN can be further applied to various biological studies such as the inference of gene regulatory networks or the identification of the interaction's relevancy in signal transduction networks. [less ▲]

Detailed reference viewed: 141 (17 UL)
See detailOpvoeding kan de democratie niet redden. Kanttekeningen bij burgerschapsvorming.
Biesta, Gert UL

in Pedagogiek in praktijk (2006), 12(30), 24-27

Detailed reference viewed: 96 (0 UL)
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See detailDe opvoeding van de 'body-mind'. Over de plaats van de pedagogiek in het werk van John Dewey
Biesta, Gert UL

in Heyting, F.; Mulder, E.; Rang, A. (Eds.) Individuatie en socialisatie in tijden van modernisering. Siswo publikatie 361. (1991)

Detailed reference viewed: 35 (0 UL)
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See detailOR and the management of electronic services - EURO'2004
Bisdorff, Raymond UL; Meyer, P.; Siskos, Y.

in European Journal of Operational Research (2008), 187(3), 1293-1295

Detailed reference viewed: 17 (0 UL)
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See detailOracle-Centric Test Case Prioritization
Staats, Matthew UL; Loyola, Pablo; Rothermel, Gregg

in ISSRE (2012)

Detailed reference viewed: 46 (4 UL)