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Huijbrechts, Maartje (author)Macro X-ray fluorescence (MA-XRF) is a recently developed technology allowing to obtain elemental information from cultural heritage objects. This information can, for example, be used to identify pigments used in a painting. Yet, the extended period of time it takes to scan an object is a major issue within MA-XRf. For instance, it took about...master thesis 2023
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de Almeida Nieto, L.M. (author), Gabrieli, Francesca (author), van Loon, A. (author), Gonzalez, Victor (author), Dik, J. (author), Van de Plas, Raf (author), Alfeld, M.W.E.M. (author)Macroscopic x-ray fluorescence imaging spectroscopy (MA-XRF) and reflectance imaging spectroscopy (RIS) are important tools in the analysis of cultural heritage objects, both for conservation and art historical research purposes. The elemental and molecular distributions provided by MA-XRF and RIS respectively, are particularly useful for the...journal article 2023
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Nedeljković, Marija (author), Tošić, Nikola (author), Schlangen, E. (author), Fennis, Sonja (author)Demand for high quality recycled concrete aggregates (RCA) to offset the use of primary materials is significantly rising due to circular economy goals and high-value reuse of concrete. The quality of RCA significantly affects their availability for new concrete production due to the variability of parent concrete streams. The optimization of...journal article 2023
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Alfeld, M.W.E.M. (author), Tempel, P. (author), van der Wijk, V. (author)The acquisition of elemental and chemical distribution images on the surface of cultural heritage objects has provided us new insights into our past. The techniques commonly employed, such as macroscopic X-ray fluorescence imaging (MA-XRF), in general require pointwise or whisk-broom scanning of an object under constant measurement geometry for...journal article 2023
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Popa, Andra (author)In this work, we present VisuaLayered, the implementation of a combined analysis workflow for pigment identification. VisuaLayered is an integrated, interactive system that focuses on the combined visual analysis of Macro X-Ray Fluorescence (MA-XRF) and Reflectance Imaging Spectroscopy (RIS) data.<br/><br/>Analysing paintings for pigment...master thesis 2022
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Neri, Elisabetta (author), Alfeld, M.W.E.M. (author), Nasr, Nesrine (author), de Viguerie, Laurence (author), Walter, Philippe (author)If ancient written sources and the visual analysis of polychromies have recently revealed the complexity of the technique of painting on statues and their frequent restoration, the non-invasive punctual chemical analyses carried out do not allow one to access the chemical composition of the different paint layers. This paper presents the...journal article 2022
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Nedeljković, Marija (author), Visser, Jeanette (author), Nijland, Timo G. (author), Valcke, Siska (author), Schlangen, Erik (author)In the Netherlands, beside cement replacement with more green cement types, there is also an urgent need for alternative materials for natural sand in new concrete in order to make it circular. Furthermore, the recyclers have raised questions regarding upscaling and the potential of fine recycled concrete aggregates (fRCA) in structural concrete...conference paper 2021
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Couvrat Desvergnes, Amélie (author), Sauvage, Leila (author), de Hond, Jan (author), D’Imporzano, Paolo (author), Alfeld, M.W.E.M. (author)A scrapbook compiled between 1660 and 1687 by Gesina ter Borch (1631–1690), a female artist from the small town of Zwolle in the Netherlands, contains an intriguing painting on paper of a full-length portrait of a young Iranian. Although the figure wears the attributes in vogue at the Safavid court of Isfahan, certain elements seem rather...journal article 2021
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Nedeljković, Marija (author), Visser, Jeanette (author), Nijland, Timo G. (author), Valcke, Siska (author), Schlangen, E. (author)In the Netherlands, beside cement replacement with more green cement types, there is also an urgent need for alternative materials for natural sand in new concrete in order to make it circular. Furthermore, the recyclers have raised questions regarding upscaling and the potential of fine recycled concrete aggregates (fRCA) in structural concrete...conference paper 2021
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de Almeida Nieto, Luis (author)The scientific analysis of historical paintings has been traditionally restricted to the analysis of paint cross-section samples. This invasive method provides extensive information but is inherently limited in scope due to the extreme heterogeneity of paintings. In the last decade, non-invasive spot analyses and spectral imaging methods have...master thesis 2020
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van Loon, A. (author), Gambardella, Alessa A. (author), Gonzalez, V.M.J.M. (author), Cotte, Marine (author), De Nolf, Wout (author), Keune, Katrien (author), Leonhardt, Emilien (author), de Groot, Suzan (author), Proaño Gaibor, Art Ness (author), Vandivere, Abbie (author)Johannes Vermeer (1632–1675) is known for his brilliant blue colours, and his frequent use of the costly natural ultramarine. This paper reveals new findings about ultramarine in the headscarf of Girl with a Pearl Earring (c. 1665, Mauritshuis). The painting was examined using a range of micro- and macroscale techniques as part of the Girl in...journal article 2020
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Braekmans, D. (author), Boschloos, Vanessa (author), Hameeuw, Hendrik (author), Van der Perre, Athena (author)A collection of Prime Cultural Heritage artefacts consisting of Egyptian late Middle Kingdom figurines (c. 1850–1700 BCE), made of unfired clay and covered in inscriptions, is kept at the Royal Museums of Art and History (RMAH) in Brussels, Belgium. Several of these hieratic inscriptions curse enemies of the Egyptian state, including...journal article 2019
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Pincé, P. (author), Braekmans, D. (author), Lycke, S. (author), Vandenabeele, P. (author)A total of 119 middle to late second millennium bce pottery samples from six sites in the Kur River Basin (Fars, Iran) were examined to characterize these ceramics and reconstruct their manufacturing technology and the origin of the primary materials. For this, a combined study of handheld XRF and thin-section petrography was performed. The...journal article 2019
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Belder, Joan (author)It is assumed that 17th century paintings were painted by a very systematic approach which involved the use of very specific palettes. For every pictorial unit, such a skin, a very specific palette was created. In this case the palette would then only be used to paint the skin and nothing else. The result is that for each pictorial unit a...master thesis 2018
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van Driel, B.A. (author), van den Berg, K.J. (author), Gerretzen, J. (author), Dik, J. (author)White pigments were abundantly used in 20th century paintings, and relate to several degradation risks such as titanium white mediated photocatalytic binder degradation or zinc soap formation. Knowledge about the white pigments that were used is essential for risk assessments of 20th century collections. In this study, a representative set of...journal article 2018
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Dooley, Kathryn A. (author), Gifford, E. Melanie (author), van Loon, A. (author), Noble, Petria (author), Zeibel, Jason G. (author), Conover, Damon M. (author), Alfeld, Matthias (author), van der Snickt, G.R. (author), Legrand, Stijn (author), Janssens, Koen (author), Dik, J. (author), Delaney, John K. (author)Late paintings of Rembrandt van Rijn (1606–1669) offer intriguing problems for both art historians and conservation scientists. In the research presented here, the key question addressed is whether observed stylistic differences in paint handling can be correlated with material differences. In Saul and David, in the collection of the Royal...journal article 2018
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Allred, Jennie (author)<br/>Scientific investigation of paintings has been facilitated by the development of advanced non-de\-struc\-tive imaging methods. Characterization of painting stratigraphy traditionally requires extraction of small paint samples, thereby limiting its use to a few locations on a painting due to its destructive nature. Alternatively, non...master thesis 2017
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Tijsseling, Laurens (author)The metal cobalt is essential in creating a sustainable society, as it is an important component in lithium- ion batteries and wind energy turbines. About half of the Earth’s land-based cobalt reserves can be found in the Democratic Republic of Congo (DRC). This study focusses on characterising cobalt-bearing copper ore from a DRC based mining...master thesis 2017
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Bach, Alicia (author)During the extension of a sport complex near Tilburg, The Netherlands, some archeological objects were discovered. Some shreds of pottery seem to confirm that the objects found were originating from the Middle Iron Age.1 Some of the objects were egg-shaped and hollow, with a small opening on the tip. The objects did awaken the thought that they...bachelor thesis 2017
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van Loon, A. (author), Noble, Petria (author), Krekeler, Anna (author), van der Snickt, G.R. (author), Janssens, Koen (author), Abe, Yoshinari (author), Nakai, Izumi (author), Dik, J. (author)This paper reports on how the application of macro X-ray fluorescence (MA-XRF) imaging, in combination with the re-examination of existing paint cross-sections, has led to the discovery of a new pigment in Rembrandt’s palette: artificial orpiment. In the NWO Science4Arts ‘ReVisRembrandt’ project, novel chemical imaging techniques are being...journal article 2017
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