Search Results - "Yannick Lefrais"

On the use of the infinite matrix assumption and associated concepts: A critical review by Guérin, Guillaume, Mercier, Norbert, Nathan, Roger, Adamiec, Grzegorz, Lefrais, Yannick

“…The infinite matrix assumption is commonly used to derive dose rates in the field of paleodosimetric dating methods. The update of nuclear data allowed…”
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FTIR-Based Crystallinity Assessment of Aragonite–Calcite Mixtures in Archaeological Lime Binders Altered by Diagenesis by Michael B. Toffolo, Lior Regev, Stéphan Dubernet, Yannick Lefrais, Elisabetta Boaretto

“…Lime plaster and mortar are pyrotechnological materials that have been employed in constructions since prehistoric times. They may nucleate as calcite and/or…”
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2D modelling: A Monte Carlo approach for assessing heterogeneous beta dose rate in luminescence and ESR dating: Paper I, theory and verification by Martin, Loїc, Fang, Fang, Mercier, Norbert, Incerti, Sébastien, Grün, Rainer, Lefrais, Yannick

“…Many samples used for luminescence and ESR dating show complex mineralogical structures, resulting in heterogeneous beta dose rates. Ideally, the beta dose…”
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DIAGNOSTIC GUIDE ENABLING DISTINCTION BETWEEN TAPHONOMIC STAINS AND ENAMEL HYPOMINERALISATION IN AN ARCHAEOLOGICAL CONTEXT by Garot, Elsa, Couture-Veschambre, Christine, Manton, David, Rodriguez, Vincent, Lefrais, Yannick, Rouas, Patrick

“…Highlights • Enamel stained by post-mortem processes may have a similar appearance to MIH. • Our diagnostic guide enables to identify developmental…”
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Procurement strategies of Neolithic colouring materials: Territoriality and networks from 6th to 5th millennia BCE in North-Western Mediterranean by Pradeau, Jean-Victor, Binder, Didier, Vérati, Chrystèle, Lardeaux, Jean-Marc, Dubernet, Stéphan, Lefrais, Yannick, Regert, Martine

“…In the N.-W. Mediterranean area, the development of the Neolithic way of life during the 6th millennium cal. BCE is related to the spread of sailing pioneer…”
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Dosimetric study of sediments at the beta dose rate scale: Characterization and modelization with the DosiVox software by Martin, Loïc, Mercier, Norbert, Incerti, Sébastien, Lefrais, Yannick, Pecheyran, Christophe, Guérin, Guillaume, Jarry, Marc, Bruxelles, Laurent, Bon, François, Pallier, Céline

“…The effects of sediment heterogeneity on beta dose rate have been investigated by simulation with the DosiVox software. Basic sediment cases, as well as a…”
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Obsidian from the Epipalaeolithic and Neolithic eastern Maghreb. A view from the Hergla context (Tunisia) by Mulazzani, Simone, Le Bourdonnec, François-Xavier, Belhouchet, Lotfi, Poupeau, Gérard, Zoughlami, Jamel, Dubernet, Stéphan, Tufano, Emiliano, Lefrais, Yannick, Khedhaier, Rym

“…In the present paper, it is shown that in the Hergla area (eastern Tunisia), obsidian was present from the early to at least the late sixth millennium cal BC…”
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Confrontation des approches histologique et micro- tomographique pour l’étude de la diagenèse osseuse : application aux vestiges anthropobiologiques de l’ancien cimetière de Koekelberg (Belgique, XIXe siècle) by Trenchat, Lolita, Vanderesse, Nicolas, Pubert, Eric, Lefrais, Yannick, Van de Vijver, Katrien, Kacki, Sacha, Schotsmans, Eline M.J

“…Les travaux sur la diagenèse osseuse, qu’ils visent à évaluer la conservation interne des vestiges osseux, à discuter l’impact des contextes sédimentaires sur…”
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Diagnostic de la fluorose dans la population romaine de Cumes (Italie, IIe siècle av. J.-C. – Ier siècle apr. J.-C.) à partir d’une approche multidisciplinaire archéométrique et paléopathologique appliquée aux restes humains brûlés by Orellana-González, Eliza, Munzi, Pricilla, Brun, Jean-Pierre, Dubernet, Stephan, Lefrais, Yannick, Kacki, Sascha, Duday, Henri, Chapoulie, Rémy, Castex, Dominique

“…La fluorose osseuse est une pathologie liée à l’accumulation excessive de fluor dans les os, qui entraine notamment une augmentation de la densité de ceux-ci…”
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Measurement of the paleodose in luminescence dating using the TM-OSL of quartz by Chruścińska, Alicja, Palczewski, Piotr, Rerek, Tomasz, Biernacka, Magdalena, Lefrais, Yannick

“…•The OSL dating of sediments using quartz significantly improved.•TM-OSL with 620 nm successfully used in the dating protocol instead of the CW-OSL.•The age…”
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Technological analysis and experimental reproduction of the techniques of perforation of quartz beads from the Ceramic period in the Antilles by Raymond, Madeleine, Fouéré, Pierrick, Ledevin, Ronan, Lefrais, Yannick, Queffelec, Alain

“…Personal ornaments are a very specific kind of material production in human societies and are particularly valuable artifacts for the archaeologist seeking to…”
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Last Glacial Maximum cryogenic calcite deposits in an alluvial fan at Villetoureix, southwest France by Bertran, Pascal, Couchoud, Isabelle, Charlier, Karine, Hatté, Christine, Lefrais, Yannick, Limondin‐Lozouet, Nicole, Queffelec, Alain

“…The origin of white calcite silts forming 0.5 to 3‐cm‐thick lenses in alluvial fan deposits 14C‐dated to the Last Glacial Maximum in the Dronne Valley…”
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Comparaison des approches histologiques et micro-tomographiques pour l’étude de la diagenèse osseuse by Trenchat, Lolita, Vanderesse, Nicolas, Pubert, Éric, Lefrais, Yannick, Van de Vijver, Katrien, Kacki, Sacha, Schotsmans, Eline M.J.

“…L’histologie est la méthode la plus classiquement utilisée pour étudier la diagenèse osseuse. Elle est cependant destructrice, ce qui a conduit certains…”
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UV femtosecond laser cleaning of encrusted historical stained-glasses by Maingi, Evan Maina, Alonso, María Pilar, de la Fuente, Germán F., Dubernet, Stéphan, Lefrais, Yannick, Chapoulie, Rémy, Vally, Elodie, Angurel, Luis A.

“…•Safe stained-glass laser cleaning protocols are designed using a fs UV laser.•Cleaned crust thickness control is improved using a multi scan series…”
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Chert sourcing using LIBS: The case of Cova del Parco, Spain by Le Guirriec, Julien, Sánchez de la Torre, Marta, Bousquet, Bruno, Lefrais, Yannick, Mangado, Xavier, González, Cynthia Belén, Le Bourdonnec, François‐Xavier

“…Cherts originating from carbonate lacustrine environments have been widely exploited by Upper Palaeolithic hunter‐gatherers in the south of the Pyrenees…”
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OSL and TL dating of the Middle Stone Age sequence at Diepkloof Rock Shelter (South Africa): a clarification by Tribolo, C., Mercier, N., Douville, E., Joron, J.-L., Reyss, J.-L., Rufer, D., Cantin, N., Lefrais, Y., Miller, C.E., Porraz, G., Parkington, J., Rigaud, J.-P., Texier, P.-J.

“…Diepkloof Rock Shelter offers an exceptional opportunity to study the onset and evolution of both Still Bay (SB) and Howiesons Poort (HP) techno-complexes…”
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Use, symbolism, and access to red pigments based on hematite and cinnabar between 400 B.C. and A.D. 1450 in Huanchaco, a pre-Hispanic maritime community on the North Coast of Peru by Prieto, Gabriel, Aldama-Reyna, Claver W., Chapoulie, Rémy, Dubernet, Stéphan, Agreda-Delgado, Jhenry F., Lefrais, Yannick, Zeballos-Velásquez, Elvira

“…In this article, we discuss the usage and availability of red pigments in the Huanchaco Maritime Community (HMC), a multi-generational group of people who…”
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Hyperspectral imaging, spectrofluorimetry, FORS and XRF for the non-invasive study of medieval miniatures materials by Mounier, Aurélie, Le Bourdon, Gwénaëlle, Aupetit, Christian, Belin, Colette, Servant, Laurent, Lazare, Sylvain, Lefrais, Yannick, Daniel, Floréal

“…Background Illuminated manuscripts are complex multi-layer and multi-material objects. To this difficulty, from the analytical point of view, is added the…”
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Copper quality and provenance in Middle Bronze Age I Byblos and Tell Arqa (Lebanon) by EL Morr, Ziad, Cattin, Florence, Bourgarit, David, Lefrais, Yannick, Degryse, Patrick

“…Forty-four Middle Bronze Age I weapons discovered at the sites of Byblos and Tell Arqa in Lebanon were investigated in order to study their copper quality and…”
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Copper quality and sources in Middle Bronze Age I Byblos and Tell Arqa (Lebanon) by El Morr, Ziad, Lefrais, Yannick Y., Cattin, Florence, Bourgarit, David, Degryse, Patrick

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