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- Koleva, D.A. (author), Van Breugel, K. (author), Mol, J.M.C. (author), De Wit, J.H.W. (author) journal article 2009
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Degradation of myocardial perfusion SPECT images caused by contaminants in thallous (201Tl) chlorideStaelens, S.G. (author), De Wit, T.C. (author), Lemahieu, I.A. (author), Beekman, F.J. (author)Purpose Thallous (201Tl) chloride is a single-photon emission computed tomography (SPECT) tracer mainly used for assessing perfusion and viability of myocardial tissue. 201Tl emits X-rays around 72 keV and gammas at 167 keV, and has a half-life of 73 h. Regulations allow an intrinsic contamination up to 3–5%, which is mainly caused by 200Tl (368...journal article 2008
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Zhang, X. (author), Van den Bos, C. (author), Sloof, W.G. (author), Hovestad, A. (author), Terryn, H. (author), De Wit, J.H.W. (author)Drying effects on corrosion performance of Cr(VI)- and Cr(III)-treated electro-galvanized steel have been studied in NaCl solution using potentiodynamic measurements and electrochemical impedance spectroscopy (EIS). The Cr(VI) and the Cr(III) treated specimens were dried at three different temperatures: 60, 110 and 210°C. The surface layers were...journal article 2006
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Koleva, D.A. (author), Van breugel, K. (author), De Wit, J.H.W. (author), Van Westing, E. (author), Boshkov, N. (author), Fraaij, A.L.A. (author)The behavior of steel reinforcement was studied using electrochemical impedance spectroscopy (EIS) and polarization resistance (PR) techniques in conditions of chloride-induced corrosion in ordinary Portland cement-mortar specimens immersed in 7% NaCl for a test period of 120 days and compared to specimens immersed in demineralized water for the...journal article 2007
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De Wit, S.I. (author)The heterogeneity of the contemporary metropolitan landscape has led to a multiplicity of intermediate spaces, in between and within the different tissues of the metropolitan landscape. These interstices can provide favourable conditions to be transformed into gardens. What design instruments can be discovered for these gardens to address the...journal article 2013
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Hu, J. (author), Koleva, D.A. (author), De Wit, J.H.W. (author), Petrov, P. (author), Van Breugel, K. (author)This study presents the results from a preliminary investigation on the corrosion behavior of low carbon steel in cement extract (CE) in the presence of very low concentration polymeric nanoaggregates (PEO113-b-PS70 micelles). The steel electrodes were investigated in Cl--containing CE as corrosion medium, compared to chloride-free CE as a...journal article 2010
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Koleva, D.A. (author), Van Breugel, K. (author), Mol, J.M.C. (author), De Wit, J.H.W. (author)This work presents the preliminary tests on the performance of cathodic prevention (CPre) in reinforced mortar, subjected to aggressive (10% NaCl environment). Cathodic prevention is an electrochemical technique for minimizing, actually "preventing" any eventual corrosion of the steel bars in reinforced concrete. Therefore, the main objective of...journal article 2010
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- Vente, M.A.D. (author), De Wit, T.C. (author), Van den Bosch, M.A.A.J. (author), Bult, W. (author), Seevinck, P.R. (author), Zonnenberg, B.A. (author), De Jong, H.W.A.M. (author), Krijger, G.C. (author), Bakker, C.J.G. (author), Van Het Schip, A.D. (author), Nijsen, J.F.W. (author) journal article 2009
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Koleva, D.A. (author), De Wit, J.H.W. (author), Van Breugel, K. (author), Bachvarov, V. (author), Kolev, H. (author), Fraaij, A. (author)The corrosion behavior of reinforcing steel, previously embedded in concrete and maintained in conditions of corrosion and two regimes (conventional and pulse) of cathodic protection (CP), was characterized using electrochemical measurements in cement extract (CE) solutions of pH 12.6. The investigation aimed at determination of the properties...journal article 2007
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Vaccaro, Davide (author), Akamatsu, Hiroki (author), Bruijn, Marcel (author), Gottardi, Luciano (author), Den Hartog, Roland (author), Van Der Kuur, Jan (author), Ridder, Marcel (author), De Wit, Martin (author), Gao, J.R. (author)We have measured and characterized the thermal crosstalk in two different arrays of transition-edge sensor (TES) X-ray microcalorimeters with frequency-domain multiplexing (FDM) readout. The TES arrays are fabricated at SRON and are a 8 × 8 and a 32 × 32 'kilo-pixel' uniform array. The amount of crosstalk is evaluated as the ratio between the...journal article 2022
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D'andrea, Matteo (author), Taralli, Emanuele (author), Akamatsu, Hiroki (author), Gottardi, Luciano (author), Nagayoshi, Kenichiro (author), Ravensberg, Kevin (author), Ridder, Marcel L. (author), Vaccaro, Davide (author), De Vries, Cor P. (author), De Wit, Martin (author), Hoogeveen, Ruud W.M. (author), Gao, J.R. (author)We are developing a kilo-pixels Ti/Au TES array as a backup option for Athena X-IFU. Here we report on single-pixel performance of a 32 × 32 array operated in a Frequency Division Multiplexing (FDM) readout system, with bias frequencies in the range 1-5 MHz. We have tested the pixels response at several photon energies, by means of a 55Fe...journal article 2021
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Kounalakis, M. (author), Gottardi, Luciano (author), De Wit, Martin (author), Blanter, Y.M. (author)We theoretically predict and experimentally observe the onset of weak-link physics in the dynamical response of transition-edge sensors (TESs). We develop a theoretical framework based on a Fokker-Planck description that incorporates both the TESs electrical response, stemming from Josephson phenomena, and the electrothermal effects due to...journal article 2023
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Wu, Z. (author), De Wit, Lidwin (author), Beek, Melanie (author), Colombi, G. (author), Chaykina, D. (author), Schreuders, H. (author), Schut, H. (author), Butterling, Maik (author), Brück, E.H. (author), Dam, B. (author), Eijt, S.W.H. (author)Cycling stability of the photochromic effect in rare-earth oxyhydride thin films is of great importance for long-term applications such as smart windows. However, an increasingly slower bleaching rate upon photochromic cycling was found in yttrium oxyhydride thin films; the origin of this memory effect is yet unclear. In this work, the...journal article 2024
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De Wit, M.R. (author)The aim of this study was to investigate if motion performance metrics for minimally invasive surgery could be derived from a two-dimensional measurement, for surgical procedures in which the movements are restricted to a defined plane. As it was assumed that for arthroscopy in the knee such behavior is present, a knee arthroscopy simulator was...master thesis 2012
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De Wit, B.M.M. (author)Oud warenhuis GLANS aan het kerkplein staat leeg en is ideaal om een nieuw publiek gebouw in te huisvesten; het plein, het gebouw en de ruimte rondom bieden plek voor vernieuwing en levendigheid. GLANS wordt een ontmoetingsplek in de stad door de verlenging van het stedelijk interieur in het gebouw en door veel diverse functies in GLANS bij...master thesis 2008
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- Nonhebel, F. (author), De Wit, M. (author) master thesis 2000
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- De Wit, H. (author) master thesis 2006
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De Wit, A. (author)In deze studie naar bouwmethoden onder bestaande bebouwing is een aantal mogelijke alternatieven, voor de bouw van de passage van de Noord/Zuidlijn met het Centraal Station, naar voren gekomen. De behandelde alternatieve bouwmethoden voor de passage van de Noord/Zuidlijn met het Amsterdam Centraal Station zijn: De buizenmethode. Het persen van...master thesis 2000
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De Wit, J.M. (author)Door de grote verkeersdrukte op rijksweg 12 (Den Haag- Utrecht). is het noodzakelijk geworden deze te herprofileren. Dit zal een aanzienlijke verbreding van deze weg tot gevolg hebben. Er zal een nieuwe kruising met de Gouwe nodig zijn. In dit verslag wordt gedacht aan vervanging van de huidige smalle brug door een tunnel in de vorm van een...master thesis 1976
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De Wit, F.P. (author)Alongshore currents are currents parallel to the coastline. In coastal areas they are driven by a combination of wave and tidal forcing. In this study, the validity of the non-hydrostatic, wave-flow model SWASH to predict these currents is investigated. This is done by comparing model predictions with measurement observations. Observations were...master thesis 2016