Peter D. Rostron
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View article: Improved coverage factors for expanded measurement uncertainty calculated from two estimated variance components
Improved coverage factors for expanded measurement uncertainty calculated from two estimated variance components Open
Measurement uncertainty (MU) arising at different stages of a measurement process can be estimated using analysis of variance (ANOVA) on replicated measurements. It is common practice to derive an expanded MU by multiplying the resulting s…
View article: Measurement uncertainty from sampling and its role in validation of measurement procedures
Measurement uncertainty from sampling and its role in validation of measurement procedures Open
It is now widely accepted that the measurement process usually begins when the primary sample is taken. The uncertainty of measurement (MU) must therefore include contributions that arise from the primary sampling, and also from any physic…
View article: Correction to: Confidence intervals for robust estimates of measurement uncertainty
Correction to: Confidence intervals for robust estimates of measurement uncertainty Open
The notations F p, ν1,ν2 and χ 2 p ,ν in Eqs. (1), (2) and (3)
View article: Confidence intervals for robust estimates of measurement uncertainty
Confidence intervals for robust estimates of measurement uncertainty Open
Uncertainties arising at different stages of a measurement process can be estimated using analysis of variance (ANOVA) on duplicated measurements. In some cases, it is also desirable to calculate confidence intervals for these uncertaintie…
View article: Quantifying Heterogeneity of Small Test Portion Masses of Geological Reference Materials by Portable <scp>XRF</scp> Spectrometry: Implications for Uncertainty of Reference Values
Quantifying Heterogeneity of Small Test Portion Masses of Geological Reference Materials by Portable <span>XRF</span> Spectrometry: Implications for Uncertainty of Reference Values Open
There is an increasing use of analytical macro‐beam techniques (such as portable XRF , PXRF ) for geochemical measurements, as a result of their convenience and relatively low cost per measurement. Reference materials ( RM s) are essential…
View article: Evaluation of uncertainties in<i>in situ</i>and<i>ex situ</i>gamma measurements on land areas with low contamination levels
Evaluation of uncertainties in<i>in situ</i>and<i>ex situ</i>gamma measurements on land areas with low contamination levels Open
Previous work on the characterisation of land areas with moderate contamination levels showed that in situ measurements made with a gamma detector can achieve lower levels of the random component of uncertainty than laboratory measurements…