User profiles for Peter Ashcroft

Peter Ashcroft

Novartis Pharma AG
Verified email at novartis.com
Cited by 506

Global survey and statistics of radio-frequency interference in AMSR-E land observations

EG Njoku, P Ashcroft, TK Chan… - IEEE Transactions on …, 2005 - ieeexplore.ieee.org
Radio-frequency interference (RFI) is an increasingly serious problem for passive and active
microwave sensing of the Earth. To satisfy their measurement objectives, many spaceborne …

Quantifying the impact of quarantine duration on COVID-19 transmission

P Ashcroft, S Lehtinen, DC Angst, N Low, S Bonhoeffer - Elife, 2021 - elifesciences.org
The large number of individuals placed into quarantine because of possible severe acute
respiratory syndrome coronavirus 2 (SARS CoV-2) exposure has high societal and economic …

Post-launch calibration of the TRMM microwave imager

FJ Wentz, P Ashcroft… - IEEE Transactions on …, 2001 - ieeexplore.ieee.org
Three post-launch calibration methods are used to examine the Tropical Rainfall Measuring
Mission (TRMM) Microwave Imager (TMI) on-orbit performance. The first method is a …

On the relationship between serial interval, infectiousness profile and generation time

S Lehtinen, P Ashcroft… - Journal of the Royal …, 2021 - royalsocietypublishing.org
The timing of transmission plays a key role in the dynamics and controllability of an epidemic.
However, observing generation times—the time interval between the infection of an …

COVID-19 infectivity profile correction

P Ashcroft, JS Huisman, S Lehtinen, JA Bouman… - arXiv preprint arXiv …, 2020 - arxiv.org
The infectivity profile of an individual with COVID-19 is attributed to the paper Temporal
dynamics in viral shedding and transmissibility of COVID-19 by He et al., published in Nature …

Fixation in finite populations evolving in fluctuating environments

P Ashcroft, PM Altrock, T Galla - Journal of The Royal …, 2014 - royalsocietypublishing.org
The environment in which a population evolves can have a crucial impact on selection. We
study evolutionary dynamics in finite populations of fixed size in a changing environment. …

[HTML][HTML] Test-trace-isolate-quarantine (TTIQ) intervention strategies after symptomatic COVID-19 case identification

P Ashcroft, S Lehtinen, S Bonhoeffer - PloS one, 2022 - journals.plos.org
The test-trace-isolate-quarantine (TTIQ) strategy, where confirmed-positive pathogen carriers
are isolated from the community and their recent close contacts are identified and pre-…

[HTML][HTML] Clonal dominance and transplantation dynamics in hematopoietic stem cell compartments

P Ashcroft, MG Manz, S Bonhoeffer - PLoS computational biology, 2017 - journals.plos.org
Hematopoietic stem cells in mammals are known to reside mostly in the bone marrow, but
also transitively passage in small numbers in the blood. Experimental findings have …

When the mean is not enough: Calculating fixation time distributions in birth-death processes

P Ashcroft, A Traulsen, T Galla - Physical Review E, 2015 - APS
Studies of fixation dynamics in Markov processes predominantly focus on the mean time to
absorption. This may be inadequate if the distribution is broad and skewed. We compute the …

MPN patients with low mutant JAK2 allele burden show late expansion restricted to erythroid and megakaryocytic lineages

R Nienhold, P Ashcroft, J Zmajkovic… - Blood, The Journal …, 2020 - ashpublications.org
Myeloproliferative neoplasms (MPNs) are clonal hematopoietic stem cell (HSC) diseases
characterized by increased proliferation of erythroid, megakaryocytic, and/or myeloid lineages. …