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IAEA Launches CRP to Enhance Isotope Data in Groundwater

IAEA Launches CRP to Enhance Isotope Data in Groundwater
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Research Contract Or Agreement , Global Water Analysis Laboratory Glowal Network , Page Models , Water Analysis Laboratory , Research Contract ,

"Bayesian analysis of De distributions in optical dating: Towards a rob" by Bo Li, Zenobia Jacobs et al.

In optical dating, especially single-grain dating, various patterns of distributions in equivalent dose (De) are usually observed and analysed using different statistical models. None of these methods, however, is designed to deal with outliers that do not form part of the population of grains associated with the event of interest (the ‘target population’), despite outliers being commonly present in single-grain De distributions. In this paper, we present a Bayesian method for detecting De outliers and making allowance for them when estimating the De value of the target population. We test this so-called Bayesian outlier model (BOM) using data sets obtained for individual grains of quartz from sediments deposited in a variety of settings, and in simulations. We find that the BOM is suitable for single-grain De distributions containing outliers that, for a variety of reasons, do not form part of the target population. For example, De outliers may be associated with grains that have ....

Page Models , Bayesian Inference , Equivalent Doses , Outlier Detection , Single Grains ,