1,721,040 research outputs found
Reflections into Ptolemaic Glass II: Characterizing Yellow, Yellowish-orange, Red, and Brown Inlays from Tebtynis
Full text linkA systematic and extensive analytical study was carried out on the loose inlays discovered in the Ptolemaic workshop of Tebtynis (Fayum oasis, Egypt). This paper presents data derived from the multi-methodological archaeometric investigations (optical microscopy, scanning electron microscopy–energy-dispersive spectroscopy, electron probe microanalysis, micro-Raman spectroscopy) performed on a set of intentionally colored and opacified glasses. In particular, we will discuss the textural, chemical, and mineralogical results related to the study of the yellow, yellowish-orange, red, and brown inlays and semi-finished/waste products now preserved at the Museo Egizio, Torino. The results highlight the presence of natron (low-magnesium glasses, LMG) and plant ash (high-magnesium glasses, HMG) base glass, coexisting with intermediate composition. Yellow samples are opacified using lead antimonates doped with iron and sometimes tin; conversely, yellowish-orange specimens and the only brown sample are characterized by nanocrystals of cuprite. Red glasses are found in two variants: Dull reds are HMG with colloidal metallic copper particles, while sealing-wax reds show LMG composition, associated with dendritic cuprite dispersed in a transparent, greenish matrix
Utilizzo di ambra non baltica in Europa nell’età del Rame e nell’età del Bronzo: analisi dei dati archeometrici ed archeologici / Non-baltic amber used in Copper and Bronze Age Europe: a review of the archaeometric and archaeological data
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
L’ambra di Campestrin (Grignano Polesine, Rovigo): analisi tipologica, archeometrica e tecnologica / Amber from Campestrin (Grignano Polesine, Rovigo): typological, archaeometrical and technological analyses
No full textManufatti in argento e stagno da contesti dell’età del Bronzo di Alba (Cuneo) / Silver and tin artefacts from the Bronze Age contexts of Alba (Cuneo)
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I materiali vetrosi di Lipari e Salina: analisi archeometriche / Vitreous materials from Lipari and Salina: archaeometric analysis
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