User profiles for Alec J. Coffman
Alec CoffmanUniversity of Pennsylvania Verified email at sas.upenn.edu Cited by 289 |
Computationally efficient composite likelihood statistics for demographic inference
Many population genetics tools employ composite likelihoods, because fully modeling genomic
linkage is challenging. But traditional approaches to estimating parameter uncertainties …
linkage is challenging. But traditional approaches to estimating parameter uncertainties …
Use of QM/MM Surface Hopping Simulations to Understand Thermally Activated Rare-Event Nonadiabatic Transitions in the Condensed Phase
We implement a rare-event sampling scheme for quantifying the rate of thermally activated
nonadiabatic transitions in the condensed phase. Our Quantum mechanics/molecular …
nonadiabatic transitions in the condensed phase. Our Quantum mechanics/molecular …
[HTML][HTML] Sampling strategies for frequency spectrum-based population genomic inference
Background The allele frequency spectrum (AFS) consists of counts of the number of single
nucleotide polymorphism (SNP) loci with derived variants present at each given frequency in …
nucleotide polymorphism (SNP) loci with derived variants present at each given frequency in …
Inferring genome-wide correlations of mutation fitness effects between populations
The effect of a mutation on fitness may differ between populations depending on environmental
and genetic context, but little is known about the factors that underlie such differences. …
and genetic context, but little is known about the factors that underlie such differences. …
When is electronic friction reliable for dynamics at a molecule–metal interface?
AJ Coffman, JE Subotnik - Physical Chemistry Chemical Physics, 2018 - pubs.rsc.org
We investigate rates of electron transfer for generalized Anderson–Holstein models in the
limit of weak molecule–metal coupling, using both surface hopping and electronic friction …
limit of weak molecule–metal coupling, using both surface hopping and electronic friction …
Triallelic population genomics for inferring correlated fitness effects of same site nonsynonymous mutations
The distribution of mutational effects on fitness is central to evolutionary genetics. Typical
univariate distributions, however, cannot model the effects of multiple mutations at the same site…
univariate distributions, however, cannot model the effects of multiple mutations at the same site…
[HTML][HTML] Modeling voltammetry curves for proton coupled electron transfer: The importance of nuclear quantum effects
We investigate rates of proton-coupled electron transfer (PCET) in potential sweep experiments
for a generalized Anderson–Holstein model with the inclusion of a quantized proton …
for a generalized Anderson–Holstein model with the inclusion of a quantized proton …
[HTML][HTML] A grid-free approach for simulating sweep and cyclic voltammetry
We present a computational approach to simulate linear sweep and cyclic voltammetry
experiments that does not require a discretized grid in space to quantify diffusion. By using a …
experiments that does not require a discretized grid in space to quantify diffusion. By using a …
Modeling Electron Transfer in Diffusive Multidimensional Electrochemical Systems
AJ Coffman, AK Harshan… - The Journal of …, 2019 - ACS Publications
We analyze different stochastic approaches for simulating electron transfer and potential
sweep experiments in diffusive multidimensional electrochemical systems. In particular, we …
sweep experiments in diffusive multidimensional electrochemical systems. In particular, we …
DFEnitely different: genome-wide characterization of differences in mutation fitness effects between populations
AL Fortier, AJ Coffman, TJ Struck, MN Irby… - bioRxiv, 2019 - biorxiv.org
The effect of a mutation on fitness may differ between populations, depending on environmental
and genetic context. Experimental studies have shown that such differences exist, but …
and genetic context. Experimental studies have shown that such differences exist, but …