2.7k citations · 3.1k across the 14 of their papers we have counts for
15 papers
Is a Recent Surge in Global Warming Detectable?
Claudie Beaulieu, Colin Gallagher, Rebecca Killick +2
The global mean surface temperature is widely studied to monitor climate change. A current debate centers around whether there has been a recent (post-1970s) surge/acceleration in…
Automatic Locally Stationary Time Series Forecasting with application to predicting U.K. Gross Value Added Time Series under sudden shocks caused by the COVID pandemic
Rebecca Killick, Marina I. Knight, Guy P. Nason +2
Accurate forecasting of the U.K. gross value added (GVA) is fundamental for measuring the growth of the U.K. economy. A common nonstationarity in GVA data, such as the ABML series,…
Good Practices and Common Pitfalls in Climate Time Series Changepoint Techniques: A Review
Robert B. Lund, Claudie Beaulieu, Rebecca Killick +2
Climate changepoint (homogenization) methods abound today, with a myriad of techniques existing in both the climate and statistics literature. Unfortunately, the appropriate change…
Detecting changes in covariance via random matrix theory
Sean Ryan, Rebecca Killick
A novel method is proposed for detecting changes in the covariance structure of moderate dimensional time series. This non-linear test statistic has a number of useful properties.…
Modelling Time-Varying First and Second-Order Structure of Time Series via Wavelets and Differencing
Euan T. McGonigle, Rebecca Killick, Matthew A. Nunes
Most time series observed in practice exhibit time-varying trend (first-order) and autocovariance (second-order) behaviour. Differencing is a commonly-used technique to remove the…
Graphical Influence Diagnostics for Changepoint Models
Ines Wilms, Rebecca Killick, David S. Matteson
Changepoint models enjoy a wide appeal in a variety of disciplines to model the heterogeneity of ordered data. Graphical influence diagnostics to characterize the influence of sing…
Changepoint Detection: An Analysis of the Central England Temperature Series
Xueheng Shi, Claudie Beaulieu, Rebecca Killick +1
This paper presents a statistical analysis of structural changes in the Central England temperature series, one of the longest surface temperature records available. A changepoint…
Autocovariance Estimation in the Presence of Changepoints
Colin Gallagher, Rebecca Killick, Robert Lund +1
This article studies estimation of a stationary autocovariance structure in the presence of an unknown number of mean shifts. Here, a Yule-Walker moment estimator for the autoregre…
The Local Partial Autocorrelation Function and Some Applications
Rebecca Killick, Marina I. Knight, Guy P. Nason +1
The classical regular and partial autocorrelation functions are powerful tools for stationary time series modelling and analysis. However, it is increasingly recognized that many t…
First Search for Lorentz and CPT Violation in Double Beta Decay with EXO-200
L. J. Kaufman
This proceedings contribution reports the first experimental search for Lorentz- and CPT-violating signals specifically studying the effect of the Standard-Model Extension (SME) os…
Virtual Machine Warmup Blows Hot and Cold
Edd Barrett, Carl Friedrich Bolz-Tereick, Rebecca Killick +2
Virtual Machines (VMs) with Just-In-Time (JIT) compilers are traditionally thought to execute programs in two phases: the initial warmup phase determines which parts of a program w…
First Search for Lorentz and CPT Violation in Double Beta Decay with EXO-200
200 Collaboration, J. B. Albert, P. S. Barbeau +86
A search for Lorentz- and CPT-violating signals in the double beta decay spectrum of Xe has been performed using an exposure of 100 kgyr with the EXO-200 detector. N…
Spectroscopy of Ba and Ba deposits in solid xenon for barium tagging in nEXO
B. Mong, S. Cook, T. Walton +73
Progress on a method of barium tagging for the nEXO double beta decay experiment is reported. Absorption and emission spectra for deposits of barium atoms and ions in solid xenon m…
An improved measurement of the 2νββ half-life of Xe-136 with EXO-200
J. B. Albert, M. Auger, D. J. Auty +94
We report on an improved measurement of the 2νββ half-life of Xe-136 performed by EXO-200. The use of a large and homogeneous time projection chamber allows for the precise estimat…
Optimal detection of changepoints with a linear computational cost
R. Killick, P. Fearnhead, I. A. Eckley
We consider the problem of detecting multiple changepoints in large data sets. Our focus is on applications where the number of changepoints will increase as we collect more data:…