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  • Author or Editor: G. Boulle x
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Abstract  

Trace elements were determined in South West African potsherds by instrumental NAA and by PIXE. The elements for which the relative spread of concentrations were greatest were selected as indicators. From these the methods of the Minimal Spanning Tree and of Nonlinear Mapping were used to classify about 60 specimens. Groups were tested by concentration, sum of concentration and normalized concentration indices. Similar groupings were obtained irrespective of which analytical data or mathematical techniques was used.

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Abstract  

Fifty five samples were analysed for 10 trace elements by INAA. In the absence of identified samples of known origin, similarities between the samples were established by constructing a minimal spanning tree based on 5 selected elements. Thereafter grouping was tested using concentration, sum of concentration, and normalised concentration indices. From the results, tentative patterns of population movement can be deduced.

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Abstract  

Data on the concentrations of K, Ca, Ti, Fe, Cu, Zn, Ga, Rb, Sr and Zr obtained by PIXE and of B, F, Na, Mg, Al, Si and Cu obtained by proton-induced prompt gamma-ray spectrometry were used to characterize archaeological artefacts and source materials by multivariate analysis. The mathematical approaches employed were cluster analysis using nearest-neighbour data, multidimensional scaling and correspondence analysis.

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Abstract  

An investigation was undertaken to measure the trace elements in the blood samples by particle induced X-ray emission (PIXE). From the measured concentrations an attempt was made to group the blood specimens by pattern recognition methods as a first step in the search for a possible correlation between the geographical area of domicile and trace elemnt composition. The trend indicated that children with lower Fe and Br contents were similar in their trace element pattern, were predominantly from two district, had lower ferritin values and were breast fed longer than the remaining children in the survey.

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