1,720,991 research outputs found
Mineralogical, isotopic and chemical characterisation of marbles from different areas in the Italian Alps
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An updated and detailed mineropetrographic and C-O stable isotopic reference database for the main Mediterranean marbles used in antiquity.
No full text(J.J.Hermann, N.Herz, R.Newton eds.), Archetype, London, 200
The Roman Marble artefacts from the Lapidario Romano (Museo Civico Archeologico Etnologico di Modena): Archeometrical evidence for italian sources
No full textSample representativeness, intercalibration of instrumental techniques and other analytical problems in archaeometry: a critical discussion based on comparative study of some reference standards.
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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
The new monumental gate excavated in Tol-e Ajori (Fars, Iran) : investigations on technology of bricks production and clay raw materials provenance
Full text linkThis workis deals with the characterization of the bricks, which belong to Tol-a Ajori Gate: one of the most important excavation in Persian plateau, closed to the World Cultural Heritage of Persepolis. The archaeological excavations of Tol-e Ajori (Fars, Iran) were carried out between 2011 and 2015 and a building structure came to the light. The wall structure is built with mud-bricks and fired bricks, some of which are glazed. In the outer face of the walls and in the collapse, decorated materials and glazed bricks were found showing parts of figurative motifs in reliefs. They are very similar to the bricks from Babylon’s Ishtar Gate, although the colours are paler without the typical blue background of this gate.
A series of representative bricks from the found materials were selected for archaeometric analyses.
Several investigations were carried out in order to clarify firstly the compositions and the technology of the bricks production. A further goal of the present study was to compare the bricks composition with local clays data to determine a possible provenance. Some clay deposits outcropping in the neighbourhood were recognised and clay samples were collected in order to possibly identify the raw materials used for the bricks material production.
Brick samples were investigated using different analytical techniques (Optical Microscopy, SEM/ESEM-EDX, FT-IR/ATR, XRD, XRF, TGA, STA and Micro-Raman) to point out differences in chemical and mineralogical composition. The clay raw materials have been submitted to XRD, XRF, SEM-EDX and FTIR-ATR analyses. In order to discriminate clays groups PCA and HCA were also performed on the chemical compositional data.
A wide homogeneity was present for all the considered bricks: Ca-rich clays with quartz-rich temper were used, this possibly suggesting a common origin. Firing temperatures were supposed on the basis of the presence of newly formed cristalline phases
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