Scaife

Scaife, W. G. (1992). Charles Parsons—Manufacturer. Journal of Materials Processing Technology 3j 32 >—Ml.1... 

Turner, R. C. and R. G. Scaife (1995), Bog Bodies New Discoveries and New Perspectives, British Museum, London. 

Figure 9.6 The theoretical effect of non-equilibrium evaporation of lead on the isotopic ratio of a typical sample from the Laurion field. The shaded area shows the extent of the Laurion field as commonly defined, and the diagonal line shows the effect of increasing non-equilibrium losses on the isotopic ratio of a sample from the centre of the field. (From Scaife, 1993, with permission of the author and the University of Bradford.)...

It follows from this that the concept of what constitutes an outlier is vitally important, since it is common practice for outliers to be omitted from the definition of isotopic fields. Scaife et al. (1996) argue that if an accurate and precise measurement is made on a sample which is geologically securely tied to a specific ore deposit, then it cannot be classified as an outlier, no matter how... 

In the absence of an assumed underlying normal distribution, simple bivariate plotting does not lead to an estimate of the true extent of the parent isotope field. This is particularly a problem if only relatively few samples are available, as is usually the case. Kernel density estimation (KDE Baxter et al., 1997) offers the prospect of building up an estimate of the true shape and size of an isotope field whilst making few extra assumptions about the data. Scaife et al. (1999) showed that lead isotope data can be fully described using KDE without resort to confidence ellipses which assume normality, and which are much less susceptible to the influence of outliers. The results of this approach are discussed in Section 9.6, after the conventional approach to interpreting lead isotope data in the eastern Mediterranean has been discussed. 

Figure 9.12 Kernel density estimate of the lead isotope data for part of the Troodos ore field, Cyprus (data from Gale et al., 1997). The superimposed Oxford ellipse has been used to represent the Cyprus ore field in several publications. (From Scaife et al., 1999 Figure 6, with permission from the first author.)...

Budd, P., Pollard, A.M., Scaife, B. and Thomas, R.G. (1995a). Oxhide ingots, recycling and the Mediterranean metals trade. Journal of Mediterranean Archaeology 8 1-32. 

Budd, P.D., Lythgoe, P., McGill, R.A.R., Pollard, A.M. and Scaife, B. (1999). Zinc fractionation in liquid brass (Cu/Zn) alloy potential environmental and archaeological applications. In Geoarchaeology Exploration, Environments, Resources, ed. Pollard, A.M., Special Publication 165, Geological Society, London, pp. 147-153. 

Scaife, B. (1993). Lead Isotope Analysis and Archaeological Provenancing. Unpublished B.Sc. dissertation, Department of Archaeological Sciences, University of Bradford. 

Scaife, B., Budd, P., McDonnell, J.G., Pollard, A.M. and Thomas, R.G. (1996). A new statistical technique for interpreting lead isotope analysis data. In Archaeometry 94. Proceedings of the 29th International Symposium on Archaeometry, ed. Demirci, ., Ozer, A.M. and Summers, G.D., Tubitak, Ankara, pp. 301-307. 

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