Ian Powell
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Using graph theory to flexibly construct patient journeys in linked healthcare data Open
IntroductionStudies of epidemiology and health system use that use linked admitted patient data benefit from understanding the patient journey, particularly when it spans multiple records within or across multiple datasets. ObjectivesTo de…
An Adaptive Sampling Algorithm for Level-set Approximation Open
We propose a new numerical scheme for approximating level-sets of Lipschitz multivariate functions which is robust to stochastic noise. The algorithm's main feature is an adaptive grid-based stochastic approximation strategy which automati…
maskr: Visual Class for Vectors with Non-Publishing Requirements Open
Create vectors with sticky flags for elements that should not be displayed.Numeric vectors have basic subset and arithmetic methods implemented.
Increased Axial Length Corresponds to Decreased Retinal Light Dose: A Parsimonious Explanation for Decreasing AMD Risk in Myopia Open
Purpose: A recent systematic review indicated that higher sunlight exposure increased risk of AMD. The Beaver Dam study and the Pathologies Oculaires Liées à L'âge study both noted that wearing hats and/or sunglasses significantly decrease…