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See detailThin film solar cells based on the ternary compound Cu2SnS3
Berg, Dominik M.; Djemour, Rabie UL; Gütay, Levent UL et al

in Thin Solid Films (2012), 520

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See detailDegradation and passivation of CuInSe2
Regesch, David UL; Gütay, Levent UL; Larsen, Jes K. UL et al

in Applied Physics Letters (2012), 101

Detailed reference viewed: 207 (10 UL)
See detailBorder Studies meet Migration Studies? Similarities and Differences
Venken, Machteld UL

Presentation (2012)

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See detailAn RLL-Constrained LDPC Coded Recording System Using Deliberate Flipping and Flipped-Bit Detection
Chou, Hung-Pu UL; Ueng, Yeong-Luh; Lin, Mao-Chao et al

in IEEE Transactions on Communications (2012)

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See detailShear Stresses in Honeycomb Sandwich Plates: Analytical Solution, Finite Elemente Method and Experimental Verification
Wahl, Laurent UL; Maas, Stefan UL; Waldmann, Danièle UL et al

in Journal of Sandwich Structures & Materials (2012), 14(4), 449-468

Honeycomb composite structures are used in airplanes, railway cars and vehicles. The sandwich panels consist of two stiff face sheets of aluminium, which are bonded to a very lightweight honeycomb core of ... [more ▼]

Honeycomb composite structures are used in airplanes, railway cars and vehicles. The sandwich panels consist of two stiff face sheets of aluminium, which are bonded to a very lightweight honeycomb core of aluminium. Compared to normal plates, sandwich panels have a very high stiffness and simultaneously a low weight. The core of these structures is mainly subjected to shear stresses. The shear stresses depend strongly on the angle of the load application. The distribution and the level of the shear stresses are investigated using analytical calculations. The load direction which induces highest stresses in the honeycomb core is derived. This direction is not the W-direction, which is the most compliant one. When doing finite element simulations of honeycomb cores, often the core is homogenized in order to reduce the calculation time. In this article, some equations are derived in order to calculate the real shear stresses from the shear stresses of the homogeneous core. The equations are validated by finite element simulations and partially by tests. Three-point bending tests and additionally some Food Cart Roller Tests were conducted in order to test the panels in different angles. [less ▲]

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See detailUsing simple relays to improve physical-layer security
Zheng, Gan UL; Jiangyuan, Li; Wong, Kai-Kit et al

in Communications in China (ICCC), 2012 1st IEEE International Conference on (2012)

This paper studies different uses of two cooperating relays to improve the secrecy rate of a wiretap channel. These two relays are assumed to perform only simple functions: either amplify-and-forward (AF ... [more ▼]

This paper studies different uses of two cooperating relays to improve the secrecy rate of a wiretap channel. These two relays are assumed to perform only simple functions: either amplify-and-forward (AF) or jamming. Complex functions such as decode-and-forward (DF) are not considered. We study three modes of cooperation: i) cooperative jamming (CJ), ii) AF-aided beamforming and iii) mixed AF-aided beamforming and CJ, all with individual relay power constraints. While i) is known in the literature, our efforts are spent on ii) and iii). In particular, for iii), we assume that the jamming signals in two communication stages are correlated, giving rise to improved performances. We also propose a heuristic approach for selecting the appropriate cooperating mode. Simulation results illustrate the performance gain of each scheme under different channel conditions and the effectiveness of the proposed mode selection method. [less ▲]

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See detailModeling default correlation in a US retail loan portfolio
Pisa, Magdalena UL; Wolff, Christian UL; Bams, Dennis

E-print/Working paper (2012)

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See detailDie Rechnungsbücher der Stadt Luxemburg. Sechstes Heft 1467-1473
Pauly, Michel UL; Moulin, Claudine

Book published by CLUDEM (2012)

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See detailUsing rule-based machine learning for candidate disease gene prioritization and sample classification of cancer gene expression data
Glaab, Enrico UL; Bacardit, Jaume; Garibaldi, Jonathan M. et al

in PLoS ONE (2012), 7(7), 39932-39932

Microarray data analysis has been shown to provide an effective tool for studying cancer and genetic diseases. Although classical machine learning techniques have successfully been applied to find ... [more ▼]

Microarray data analysis has been shown to provide an effective tool for studying cancer and genetic diseases. Although classical machine learning techniques have successfully been applied to find informative genes and to predict class labels for new samples, common restrictions of microarray analysis such as small sample sizes, a large attribute space and high noise levels still limit its scientific and clinical applications. Increasing the interpretability of prediction models while retaining a high accuracy would help to exploit the information content in microarray data more effectively. For this purpose, we evaluate our rule-based evolutionary machine learning systems, BioHEL and GAssist, on three public microarray cancer datasets, obtaining simple rule-based models for sample classification. A comparison with other benchmark microarray sample classifiers based on three diverse feature selection algorithms suggests that these evolutionary learning techniques can compete with state-of-the-art methods like support vector machines. The obtained models reach accuracies above 90% in two-level external cross-validation, with the added value of facilitating interpretation by using only combinations of simple if-then-else rules. As a further benefit, a literature mining analysis reveals that prioritizations of informative genes extracted from BioHEL’s classification rule sets can outperform gene rankings obtained from a conventional ensemble feature selection in terms of the pointwise mutual information between relevant disease terms and the standardized names of top-ranked genes. [less ▲]

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See detailShear stresses in honeycomb sandwich plates: Analytical solution, finite element method and experimental verification
Wahl, Laurent UL; Maas, Stefan UL; Waldmann, Danièle UL et al

in Journal of Sandwich Structures & Materials (2012), 4

Honeycomb composite structures are used in airplanes, railway cars and vehicles. The sandwich panels consist of two stiff face sheets of aluminium, which are bonded to a very lightweight honeycomb core of ... [more ▼]

Honeycomb composite structures are used in airplanes, railway cars and vehicles. The sandwich panels consist of two stiff face sheets of aluminium, which are bonded to a very lightweight honeycomb core of aluminium. Compared to normal plates, sandwich panels have a very high stiffness and simultaneously a low weight. The core of these structures is mainly subjected to shear stresses. The shear stresses depend strongly on the angle of the load application. The distribution and the level of the shear stresses are investigated using analytical calculations. The load direction which induces highest stresses in the honeycomb core is derived. This direction is not the W-direction, which is the most compliant one. When doing finite element simulations of honeycomb cores, often the core is homogenized in order to reduce the calculation time. In this article, some equations are derived in order to calculate the real shear stresses from the shear stresses of the homogeneous core. The equations are validated by finite element simulations and partially by tests. Three-point bending tests and additionally some Food Cart Roller Tests were conducted in order to test the panels in different angles. [less ▲]

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See detailHistory of working-life non-employment spells predicts later cognitive function in middle- and older-aged Europeans
Leist, Anja UL; Avendano, M.; van Lenthe, F. J. et al

in Psychology and Health (2012), 27(S1), 79-79

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See detailDoctor’s view on doctor-patient-communication in a multilingual and multicultural setting.
Bourkel, Elisabeth UL; Ferring, Dieter UL

in Psychology and Health (2012), 27(Sup1), 12-12

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See detailRegional distribution of thermal sensitivity to cold at rest and during mild exercise in males
Ouzzahra, Yacine UL; Havenith, George; Redortier, Bernard

in Journal of Thermal Biology (2012), 37(7), 517-523

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See detailPerceived rights of and social distance to people with Alzheimer's disease
Bourkel, Elisabeth UL; Ferring, Dieter UL; Weber, Germain

in GeroPsych: Journal of Gerontopsychology and Geriatric Psychiatry (2012), 25(1), 25-32

The present study investigated how laypeople and professionals (N = 185) judge the rights of a person affected with Alzheimer’s disease (AD) and whether social distance exists towards this person ... [more ▼]

The present study investigated how laypeople and professionals (N = 185) judge the rights of a person affected with Alzheimer’s disease (AD) and whether social distance exists towards this person. Participants completed a questionnaire after reading a vignette describing a target person with an early stage of AD. Half of the participants responded to a female target, the other half responded to a male target. Results showed that rights and competencies of the persons are rated high and social distance is exhibited only to a lesser degree, although there was a significant difference between the male and female target. Furthermore, health professionals approved more rights than laypeople, which suggests that there is a need for more detailed information about this disease in the general population. [less ▲]

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See detailHigher trace and Berezinian of matrices over a Clifford algebra
Covolo, Tiffany UL; Ovsienko, Valentin; Poncin, Norbert UL

in Journal of Geometry and Physics (2012), 62(11), 22942319

We define the notions of trace, determinant and, more generally, Berezinian of matrices over a (Z_2)^n-graded commutative associative algebra A. The applications include a new approach to the classical ... [more ▼]

We define the notions of trace, determinant and, more generally, Berezinian of matrices over a (Z_2)^n-graded commutative associative algebra A. The applications include a new approach to the classical theory of matrices with coefficients in a Clifford algebra, in particular of quaternionic matrices. In a special case, we recover the classical Dieudonné determinant of quaternionic matrices, but in general our quaternionic determinant is different. We show that the graded determinant of purely even (Z_2)^n-graded matrices of degree 0 is polynomial in its entries. In the case of the algebra A = H of quaternions, we calculate the formula for the Berezinian in terms of a product of quasiminors in the sense of Gelfand, Retakh, and Wilson. The graded trace is related to the graded Berezinian (and determinant) by a (Z_2)^n-graded version of Liouville’s formula. [less ▲]

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See detailKernel-smoothed cumulative distribution function estimation with akdensity
Van Kerm, Philippe UL

in Stata Journal (2012), 12(3), 543-548

In this article, I describe estimation of the kernel-smoothed cumulative distribution function with the user-written package akdensity, with formulas and an example.

Detailed reference viewed: 88 (2 UL)
See detailOp Zoek naar Televisie (1925-1960)
Fickers, Andreas UL

in Een Eeuw van Beeld en Geluid. Cultuurgeschiedenis van Radio en Televisie in Nederland. (2012)

Detailed reference viewed: 185 (8 UL)
See detailEffects of ethnicity on thermal sensitivity to cold
Ouzzahra, Yacine UL; Voelcker, Thomas

Scientific Conference (2012)

Detailed reference viewed: 32 (0 UL)
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See detailEFSF, ESM, nouveau pacte budgétaire : le droit européen mis à l’épreuve
Prüm, André UL

in Revue de Droit Bancaire et Financier (2012), (2, mars-avril 2012), 2-2

Detailed reference viewed: 104 (11 UL)