72 citations · 154 across the 9 of their papers we have counts for
9 papers
A tissue-fraction estimation-based segmentation method for quantitative dopamine transporter SPECT
Ziping Liu, Hae Sol Moon, Zekun Li +4
Quantitative measures of dopamine transporter (DaT) uptake in caudate, putamen, and globus pallidus (GP) have potential as biomarkers for measuring the severity of Parkinson diseas…
PyCraters: A Python framework for crater function analysis
Scott A. Norris
We introduce a Python framework designed to automate the most common tasks associated with the extraction and upscaling of the statistics of single-impact crater functions to infor…
Crater functions for compound materials: a route to parameter estimation in coupled-PDE models of ion bombardment
Scott A. Norris, Juha Samela, Matias Vestberg +2
During the ion bombardment of targets containing multiple component species, highly-ordered arrays of nanostructures are sometimes observed. Models incorporating coupled partial di…
Stress-induced patterns in ion-irradiated Silicon: a model based on anisotropic plastic flow
Scott A. Norris
We present a model for the effect of stress on thin amorphous films that develop atop ion-irradiated silicon, based on the mechanism of ion-induced anisotropic plastic flow. Using…
Phase separation in ion-irradiated compound semiconductors: an alternate route to ordered nano-structures
Scott A. Norris
In recent years, observations of highly-ordered, hexagonal arrays of self-organized nanostructures on binary or impurity-laced targets under normal-incidence ion irradiation have e…
Stability analysis of a viscoelastic model for ion-irradiated silicon
Scott A. Norris
To study the effect of stress within the thin amorphous film generated atop Si irradiated by Ar+, we model the film as a viscoelastic medium into which the ion beam continually inj…
MD-Predicted Phase diagrams for Pattern Formation due to Ion Irradiation
Scott A. Norris, Juha Samela, Laura Bukonte +6
Energetic particle irradiation of solids can cause surface ultra-smoothening, self-organized nanoscale pattern formation, or degradation of the structural integrity of nuclear reac…
A Mean-Field Theory for Coarsening Faceted Surfaces
Scott A. Norris, Stephen J. Watson
A mean-field theory is developed for the scale-invariant length distributions observed during the coarsening of one-dimensional faceted surfaces. This theory closely follows the Li…
The Kinematics of Completely-Faceted Surfaces
Scott A. Norris, Stephen J. Watson
We fully generalize a previously-developed computational geometry tool [1] to perform large-scale simulations of arbitrary two-dimensional faceted surfaces . Our method…