Publicaties
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Madkhil li-Tarikh Al-'Ilm: Tawti'ah [Introduction to the history of science: introduction] KU Leuven
Theoretical Study of the Hydrogen Release Mechanism from a Lithium Derivative of Ammonia: Borane LiNH2BH3-NH3BH3 KU Leuven
Ammonia borane and lithium amidoborane proved to have potential as efficient hydrogen storage materials. Although a combination of both compounds, LiNH2BH3-NH3BH3 has been shown to have even better hydrogen release characteristics, the inherent process was not clear. We determined the reaction mechanism of H2 release from LiNH2BH3-NH3BH3 using computational quantum chemistry methods (MP2 and CCSD(T) methods and aug-cc-pVnZ basis sets). The ...
Novel polyphenylsulfone membrane for potential use in solvent nanofiltration KU Leuven
In this work, the preparation of nanofiltration flat sheet membranes based on polyphenylsulfone (PPSU) was investigated. A synthesis method based on phase inversion with three different compositions of PPSU (17wt.%, 21wt.% and 25wt.%) in dimethylacetamide (DMA), N-methyl-2-pyrrolidone (NMP) and a mixture of dimethylformamide (DMF) and NMP was employed. Scanning electron microscopy (SEM) was used to investigate the morphological characteristics ...
Stress-state evolution of the brittle upper crust during compressional tectonic inversion as defined by successive quartz vein types (High-Ardenne slate belt, Germany) KU Leuven
In the frontal part of the Rhenohercynian fold-and-thrust belt (High-Ardenne slate belt, Germany), two successive types of quartz veins, oriented normal and parallel to bedding respectively, are interpreted to reflect the early Variscan compressional tectonic inversion of the Ardenne-Eifel sedimentary basin. Fracturing and sealing occurred in Lower Devonian siliciclastic multilayers under very low-grade metamorphic conditions in a brittle upper ...
Iterative methods for the canonical decomposition of multi-ways arrays : application to blind underdetermined mixture identification KU Leuven
Two main drawbacks can be stated in the alternating least square (ALS) algorithm used to fit the canonical decomposition (CAND) of multi-way arrays. First its slow convergence caused by the presence of collinearity between factors in the multi-way array it decomposes. Second its blindness to Hermitian symmetries of the considered arrays. Enhanced line search (ELS) scheme was found to be a good way to cope with the slow convergence of the ALS ...
Novel orthogonal codes for spectrally-encoded CDMA systems in fading channels KU Leuven
Orthogonal spreading codes play an essential role in code-division multiple-access (CDMA) systems by eliminating multiple-access interference (MAI). In this paper, a novel orthogonal spreading code has been proposed for spectrally-encoded (SE) CDMA, a.k.a., spread-time (ST) CDMA with arbitrary pulse shape. It has been shown that it is possible to retain the orthogonality of the code in the presence of tail truncation by time windowing and in a ...