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Author: Nicholas Allgaier (2)


Nov
2017

Neuroimaging studies of attention-deficit/hyperactivity disorder (ADHD) have most commonly reported volumetric abnormalities in the basal ganglia, cerebellum, and prefrontal cortices. Few studies have examined the relationship between ADHD symptomatology and brain structure in population-based samples. We investigated the relationship between dimensional measures of ADHD symptomatology, brain structure, and reaction time variability-an index of lapses in attention.

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Feb
2012

Empirical correction of a toy climate model.

Phys Rev E Stat Nonlin Soft Matter Phys 2012 Feb 2;85(2 Pt 2):026201. Epub 2012 Feb 2.
Nicholas A Allgaier, Kameron D Harris, Christopher M Danforth
Improving the accuracy of forecast models for physical systems such as the atmosphere is a crucial ongoing effort. The primary focus of recent research on these highly nonlinear systems has been errors in state estimation, but as that error has been successfully diminished, the role of model error in forecast uncertainty has duly increased. The present study is an investigation of an empirical model correction procedure involving the comparison of short forecasts with a reference "truth" system during a training period, in order to calculate systematic (1) state-independent model bias and (2) state-dependent error patterns.

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