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Compositional data analysis of archaeological glass { problems and possible solutions: (in preparation
, 2003
"... Table 1, which shows a subset of archaeological glass compositional data for a particular Romano-British glass vessel type, facet-cut beakers, reproduces Table 1 of Baxter and Beardah (2003). The full data set, and data for three other vessel types, is given in Baxter, Cool and Jackson (2003), ..."
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Table 1, which shows a subset of archaeological glass compositional data for a particular Romano-British glass vessel type, facet-cut beakers, reproduces Table 1 of Baxter and Beardah (2003). The full data set, and data for three other vessel types, is given in Baxter, Cool and Jackson (2003),
COMPOSITIONAL DATA ANALYSIS IN ARCHAEOMETRY
"... We shall call an n p data matrix fully-compositional if the rows sum to a constant, and sub-compositional if the variables are a subset of a fully-compositional data set1. Such data occur widely in archaeometry, where it is common to determine the chemical composition of ceramic, glass, metal or ot ..."
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We shall call an n p data matrix fully-compositional if the rows sum to a constant, and sub-compositional if the variables are a subset of a fully-compositional data set1. Such data occur widely in archaeometry, where it is common to determine the chemical composition of ceramic, glass, metal or other artefacts using techniques such as neutron activation analysis (NAA), inductively coupled
© Author(s) 2014. CC Attribution 3.0 License.
, 2014
"... www.solid-earth.net/5/651/2014/ doi:10.5194/se-5-651-2014 ..."
Elemental Analysis of New Zealand Nephrite Jade (pounamu) for Forensic Purposes
"... Pounamu (NZ jade), or nephrite, is a protected mineral in its natural form following the transfer of ownership back to Ngai Tahu under the Ngai Tahu (Pounamu Vesting) Act 1997. Any theft of nephrite is prosecutable under the Crimes Act 1961. Scientific evidence is essential in cases where origin is ..."
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Pounamu (NZ jade), or nephrite, is a protected mineral in its natural form following the transfer of ownership back to Ngai Tahu under the Ngai Tahu (Pounamu Vesting) Act 1997. Any theft of nephrite is prosecutable under the Crimes Act 1961. Scientific evidence is essential in cases where origin is disputed. A robust method for discrimination of this material through the use of elemental analysis and compositional data analysis is required. Initial studies have characterised the variability within a given nephrite source. This has included investigation of both in situ outcrops and alluvial material. Methods for the discrimination of two geographically close nephrite sources are being developed.
1 COMPOSITIONAL DATA ANALYSIS: WHERE ARE WE AND WHERE SHOULD WE BE HEADING?
"... We take stock of the present position of compositional data analysis, of what has been achieved in the last 20 years, and then make suggestions as to what may be sensible avenues of future research. We take an uncompromisingly applied mathematical view, that the challenge of solving practical proble ..."
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We take stock of the present position of compositional data analysis, of what has been achieved in the last 20 years, and then make suggestions as to what may be sensible avenues of future research. We take an uncompromisingly applied mathematical view, that the challenge of solving practical problems should motivate our theoretical research; and that any new theory should be thoroughly investigated to see if it may provide answers to previously abandoned practical considerations. Indeed a main theme of this lecture will be to demonstrate this applied mathematical approach by a number of challenging examples.
