Lirias

    Finite element small-signal simulation of electromagnetic devices considering eddy currents in the laminations

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    This paper presents the validation of a small-signal finite element simulation strategy comparing different simulation approaches. At first a full 3D non-linear model in the time domain is presented. Then the small-signal strategy has been applied to the 3D model achieving a considerable reduction of computational time. In both 3D models, the eddy currents in the laminations are fully modelled. Then, in order to avoid 3D model, a 2D model has been considered. In this case, eddy currents are included adopting a homogenization technique. In the 2D case, both non-linear time domain simulations and smallsignal strategy have been implemented. The results of the four considered simulation strategies are in very good agreement, proving that the smallsignal simulation strategy can be profitably used in order to reduce significantly the computational cost. As an example, the paper considers a two port mutual inductor as a test model.status: publishe

    Leveraging single for multi-target tracking using a novel trajectory overlap affinity measure

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    Manen S., Timofte R., Dai D., Van Gool L., ''Leveraging single for multi-target tracking using a novel trajectory overlap affinity measure'', IEEE winter conference on applications of computer vision - WACV 2016, 9 pp., March 7-9, 2016, Lake Placid, NY, USA.status: publishe

    Chemical interaction mechanism of 10-MDP with zirconia

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    Currently, the functional monomer 10-methacryloyloxy-decyl-dihydrogen-phosphate (10-MDP) was documented to chemically bond to zirconia ceramics. However, little research has been conducted to unravel the underlying mechanisms. This study aimed to assess the chemical interaction and to demonstrate the mechanisms of coordination between 10-MDP and zirconium oxide using 1H and 31P magic angle spinning (MAS) nuclear magnetic resonance (NMR) and two dimensional (2D) 1H → 31P heteronuclear correlation (HETCOR) NMR. In addition, shear bond-strength (SBS) tests were conducted to determine the effect of 10-MDP concentration on the bonding effectiveness to zirconia. These SBS tests revealed a 10-MDP concentration-dependent SBS with a minimum of 1-ppb 10-MDP needed. 31P-NMR revealed that one P-OH non-deprotonated of the PO3H2 group from 10-MDP chemically bonded strongly to zirconia. 1H-31P HETCOR NMR indicated that the 10-MDP monomer can be adsorbed onto the zirconia particles by hydrogen bonding between the P=O and Zr-OH groups or via ionic interactions between partially positive Zr and deprotonated 10-MDP (P-O-). The combination of 1H NMR and 2D 1H-31P HETCOR NMR enabled to describe the different chemical states of the 10-MDP bonds with zirconia; they not only revealed ionic but also hydrogen bonding between 10-MDP and zirconia.status: publishe

    Saai als behangpapier

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    status: publishe

    Rijp voor puberteit: Potpourri IV en het onafhankelijk toezicht op de gevangenissen

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    status: publishe

    Stochastic estimation of level density in nuclear shell-model calculations

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    An estimation method of the nuclear level density stochastically based on nuclear shell-model calculations is introduced. In order to count the number of the eigen-values of the shell-model Hamiltonian matrix, we perform the contour integral of the matrix element of a resolvent. The shifted block Krylov subspace method enables us its efficient computation. Utilizing this method, the contamination of center-of-mass motion is clearly removed.status: publishe

    Terrorism, memory and dealing with a trauma. Spontaneous memorialization of the 2016 Brussels attacks

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    Whilst the interest of memory scholars in political violence and more specifically in terrorism is not novel, after the terrorist attacks in Paris (2015) and Brussels (2016) there appears to be a certain urgency to reflect upon these nascent memories in collective, European immaginarium. This article traces the development of a “bottom-up” memorialization process in the immediate aftermath of terrorist attacks in Brussels (March - July 2016) questioning how these acts of terrorisms will settle in our collective memory. By scrutinizing unprompted memorialization of the Brussels’ attacks victims, I analyse social meanings and roles assigned to spontaneous memorials emerging in hours and days after the traumatic event. The research is based on data collected through the techniques of ethnographic observations, explorative interviews with the visitors and documentary analysis of memorabilia in three spontaneous memorials’ sites (Place de la Bourse, Maelbeek and Zaventem airport). Arguing that spontaneous memorialization is more than a simple vehicle for coming to terms with a trauma and a pre-step of “official” memory works, this article draws attention to the challenge before the policy makers of transforming these ephemeral places of memory into an “official” monument.status: publishe

    Dietary practices at the castle of Middelburg, Belgium: Organic residue analysis of 16th- to 17th-century ceramics

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    Between 2002 and 2004, excavations on the castle of Middelburg (Belgium) revealed ample pottery assemblages dating to the 16th and 17th centuries. Gas chromatography mass spectrometry (GC–MS) analysis of preserved surface residues on these ceramics allowed the identification of biomarkers for animal and vegetal foods, and thermal processing. This paper furthermore reinforces the methodology for examining food residues by GC–MS, particularly in pottery in which highly varied meals were prepared. For example, this study forms the first instance in which dairy signals have been identified in mid-chain ketones. Moreover, insights are gained in the multiple uses of vessel types and questions arise on the dietary and medicinal practices of the inhabitants of this particular castle site.status: publishe
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