Thomas A. Marks
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View article: Uncertainty quantification of a multi-component Hall thruster model at varying facility pressures
Uncertainty quantification of a multi-component Hall thruster model at varying facility pressures Open
Bayesian inference is applied to calibrate and quantify prediction uncertainty in a coupled multi-component Hall thruster model. The model consists of cathode, discharge, and plume submodels and outputs thruster performance metrics, one-di…
View article: Hall thruster model improvement by multidisciplinary uncertainty quantification
Hall thruster model improvement by multidisciplinary uncertainty quantification Open
We study the analysis and refinement of a predictive engineering model for enabling rapid prediction of Hall thruster system performance across a range of operating and environmental conditions and epistemic and aleatoric uncertainties. In…
View article: Stapled enterectomy reduces surgical time when compared with sutured enterectomy: a retrospective review of 54 cats
Stapled enterectomy reduces surgical time when compared with sutured enterectomy: a retrospective review of 54 cats Open
Objectives Feline enterectomy is commonly performed in referral and general veterinary practice; however, existing studies in the veterinary literature lack significant case numbers to guide clinical decision-making. In addition, no studie…
View article: Trends in mass utilization of a magnetically shielded Hall thruster operating on xenon and krypton
Trends in mass utilization of a magnetically shielded Hall thruster operating on xenon and krypton Open
The trends in mass utilization with increasing discharge voltage and current are investigated for a magnetically shielded Hall thruster operating on xenon and krypton. A 9 kW class shielded thruster is operated with discharge voltages from…
View article: Prognostic factors and outcome in cats with thymic epithelial tumours: 64 cases (1999‐2021)
Prognostic factors and outcome in cats with thymic epithelial tumours: 64 cases (1999‐2021) Open
Objectives To describe the clinical presentation, treatment and outcomes of cats diagnosed with thymic epithelial tumours and to determine prognostic factors for survival and recurrence. Materials and Methods Clinical records of cats diagn…
View article: HallThruster.jl: a Julia package for 1D Hall thrusterdischarge simulation
HallThruster.jl: a Julia package for 1D Hall thrusterdischarge simulation Open
Although the Hall effect thruster is one of the most widely-used forms of in-space electric propulsion, there are aspects of these devices-particularly the electron dynamics-that remain poorly understood.This knowledge gap has precluded th…
View article: Challenges with the self-consistent implementation of closure models for anomalous electron transport in fluid simulations of Hall thrusters
Challenges with the self-consistent implementation of closure models for anomalous electron transport in fluid simulations of Hall thrusters Open
The performance of closure models for the anomalous electron transport when self-consistently implemented in a fluid model for a Hall effect thruster is investigated. This cross-field transport, which is orders of magnitude higher than cla…
View article: Modeling Anomalous Electron Transport in a Fluid Hall Thruster Code
Modeling Anomalous Electron Transport in a Fluid Hall Thruster Code Open
Hall thrusters are the most widely-used type of in-space electric propulsion device. However, aspects of the physics of their operation remain poorly-understood. Notably, the problem of enhanced cross-field electron transport prevents pred…
View article: Feline epithelial thymic tumours: outcome and prognostic factors
Feline epithelial thymic tumours: outcome and prognostic factors Open
ObjectivesTo describe the clinical presentation, treatment and outcomes following diagnosis of epithelial thymic tumours in cats and to determine prognostic factors for survival.
View article: Gray zone in red: China revisits the past
Gray zone in red: China revisits the past Open
With the United States having shifted its defense emphasis to peer and near-peer rivals, study of irregular warfare has likewise expanded its scope to applicable lessons for the strategic level, wi...
View article: Impacts of Snow Storm and Power Outage on Critical Care for Multiple Health Outcomes in New York State
Impacts of Snow Storm and Power Outage on Critical Care for Multiple Health Outcomes in New York State Open
TPS 661: Climate change: temperature effects 1, Exhibition Hall, Ground floor, August 26, 2019, 3:00 PM - 4:30 PM Background: Extreme weather events are becoming more frequent, and snow storms are a major event seen in the Northeast. While…
View article: Perspectives on the American way of war: the U.S. experience in irregular conflict
Perspectives on the American way of war: the U.S. experience in irregular conflict Open
Strategically, adaptation to insurgent challenges invariably proves difficult. Not only must the precise nature of the threat be discerned, but adaptation must occur even as the conflict develops. ...
View article: The influence of neoadjuvant chemoradiotherapy on muscle mass in patients with rectal cancer
The influence of neoadjuvant chemoradiotherapy on muscle mass in patients with rectal cancer Open
Background: The psoas major muscle accurately represents overall skeletal muscle mass. The skeletal muscle mass volume is related to outcomes in multiple surgical procedures including colorectal cancer. However, neoadjuvant chemoradiothera…
View article: Violence in context: Mapping the strategies and operational art of irregular warfare
Violence in context: Mapping the strategies and operational art of irregular warfare Open
The malaise that the United States, and the West, have experienced in recent campaigns stems in large part from unclear thinking about war, its political essence, and the strategies needed to join the two. Instead, analysis and response ar…
View article: Back to the future – people’s war in the 21st century
Back to the future – people’s war in the 21st century Open
Keywords: BoliviaFARCHo Chi MinhChe GuevaraLin Biaomass lineVo Nguyen GiapMao ZedongMaoismpeople’s warSendero Luminoso