A. Aueron & D. Thomas, "Evaluating Tension between Specialization and Generalization in System Design with Excess Functionality," AIAA SciTech, Nashville, Tennessee, January 11-15, 2021. https://doi.org/10.2514/6.2021-1040

S. Godshall & D. Thomas, "U.S. Space Force Collaborative Education System: Needs Analysis and Concept Exploration," AIAA SciTech, Nashville, Tennessee, January 11-15, 2021. https://doi.org/10.2514/6.2021-1436

V. Lopez, A. Flint, & D. Thomas, "Programmatic Management for the AEGIS CubeSat in a Model Based System Engineering Environment," AIAA SciTech, Nashville, Tennessee, January 11-15, 2021. https://doi.org/10.2514/6.2021-0623

D. Nikitaev & D. Thomas, "Transient Performance of a Nuclear Thermal Propulsion Engine Utilizing Seeded Hydrogen," AIAA SciTech, Nashville, Tennessee, January 11-15, 2021. https://doi.org/10.2514/6.2021-0045

D. Nikitaeva, D. Thomas, A. Aueron, S. Kumar, & D. Nikitaev, "Nuclear Thermal Propulsion Spacecraft Integrated System Model," AIAA SciTech, Nashville, Tennessee, January 11-15, 2021. https://doi.org/10.2514/6.2021-1922

S. Raghu & D. Thomas, "Model Based Failure Mode, Effects and Criticality Analysis (MBFMECA) for the RS-25 Engine using SysML," AIAA SciTech, Nashville, Tennessee, January 11-15, 2021. https://doi.org/10.2514/6.2021-0305

I. Rountree & D. Thomas, "MBSE to Incorporate Human Systems Integration Modelling," AIAA SciTech, Nashville, Tennessee, January 11-15, 2021. https://doi.org/10.2514/6.2021-0096

A. Aueron & D. Thomas, "Mars Mission Architecture Decision through Value Models," Nuclear and Emerging Technologies for Space, American Nuclear Society Topical Meeting, Knoxville, Tennessee, April 6-9, 2020.

A. Aueron and D. Thomas, "Value Driven Mars Architecture Design," AIAA Propulsion and Energy Forum and Exposition, New Orleans, August 24-26, 2020. https://doi.org/10.2514/6.2020-3848

S. Kumar, D. Thomas, and J. Cassibry, "Preliminary Trajectory Design for Jupiter Rendezvous Mission Using Nuclear Thermal Propulsion," AIAA Propulsion and Energy Forum and Exposition, New Orleans, August 24-26, 2020. https://doi.org/10.2514/6.2020-3840

S. Kumar, D. Thomas, J. Cassibry, and R. Frederick, "Review of Nuclear Thermal Propulsion Technology for Deep Space Missions," AIAA Propulsion and Energy Forum and Exposition, New Orleans, August 24- 26, 2020. https://doi.org/10.2514/6.2020-3915

N. Morris and D. Thomas, "A Cool Model to Analyze Heat Deposition on MTV Propellant Tanks," AIAA Propulsion and Energy Forum and Exposition, New Orleans, August 24-26, 2020. DOI:10.1080/00295450.2020.1819157

N. Morris & D. Thomas, "Stay cool – Alternatives for Long Term Storage of Large Quantities of Liquid Hydrogen on a Mars Transfer Vehicle", Nuclear and Emerging Technologies for Space, American Nuclear Society Topical Meeting, Knoxville, Tennessee, April 6-9, 2020.

D. Nikitaev, D. Thomas, & J. Cassibry, "A Laboratory Test to Evaluate Seeded Hydrogen in a Nuclear Thermal Rocket Engine, Nuclear and Emerging Technologies for Space, American Nuclear Society Topical Meeting, Knoxville, Tennessee, April 6-9, 2020.

D. Nikitaev, S. Kumar, D. Thomas, & J. Cassibry, "Launch Vehicle Selection for Mars Transfer Vehicles Utilizing Seeded Hydrogen in a Nuclear Thermal Propulsion System," AIAA ASCEND, Las Vegas, Nevada, November 16-18, 2020. https://doi.org/10.2514/6.2020-4054

S. L. Raghu and D. Thomas, "Model Based FMEA (MBFMEA) generation for the RS-25 engine using SysML", AIAA Propulsion and Energy Forum and Exposition, New Orleans, August 24-26, 2020. https://doi.org/10.2514/6.2021-0305

I. Rountree, V. Lopez, & D. Thomas, "Change Management Processes in MBSE," 18th Conference on Systems Engineering Research, Redondo Beach, California, March 19-21, 2020.

E. Wood & D. Thomas, "Alternatives for Electrical Power Production from a Nuclear Thermal Propulsion Engine", Nuclear and Emerging Technologies for Space, American Nuclear Society Topical Meeting, Knoxville, Tennessee, April 6-9, 2020.

E. Wood, D. Thomas, and J. Cassibry, "Minimally-Intrusive Power Generation Alternatives from a Nuclear Thermal Propulsion Engine," AIAA Propulsion and Energy Forum and Exposition, New Orleans, August 24-26, 2020. https://doi.org/10.2514/6.2020-3844

A. Aueron & D. Thomas, "Trades on Densified Propellant for Nuclear Thermal Propulsion," Nuclear and Emerging Technologies for Space, American Nuclear Society Topical Meeting, Richland, Washington, February 25 – 28, 2019.

A. Aueron & D. Thomas, "Nuclear Thermal Propulsion Vehicle Scaling and the Importance of Densified Propellant," AIAA-2019-3942, AIAA Propulsion & Energy Forum, Indianapolis, Indiana, August 19-22, 2019. https://doi.org/10.2514/6.2019-3942

A. Aueron, D. Thomas, & P. Collopy, "The Value of Enhanced Delta V Capacity: A Europa Clipper Case Study," 70th International Astronautical Congress, Paper IAC-19,D2,8-A5.4,12,x51117, Washington, DC, October 21-25, 2019.

V. Lopez & D. Thomas, "Complexity Assessment Using SysML Models," 2019 Conference on Systems Engineering Research (CSER), Washington, DC, April 3-4, 2019. https://doi.org/10.1016/j.procs.2019.05.074

D. Nikitaev, "Air and Space Thermal Rocket Engine with Turbojet (ASTRET)," AIAA-2019-4393, AIAA Propulsion & Energy Forum, Indianapolis, Indiana, August 19-22, 2019. https://doi.org/10.2514/6.2019-4393

S. Rawlins & D. Thomas, "A Proposed Solution to Address Nuclear Thermal Propulsion Fuel Embrittlement and Cryogenic Hydrogen Requirements," Nuclear and Emerging Technologies for Space, American Nuclear Society Topical Meeting, Richland, Washington, February 25 – 28, 2019.

D. Thomas, A. Aueron, V. Lopez, and A. Bower, A. , "Virtual Systems Integration Applied to Advanced Space Systems," AIAA-2019-4053, AIAA Propulsion & Energy Forum, Indianapolis, Indiana, August 19-22, 2019. https://doi.org/10.2514/6.2019-4053

A. Aueron, Z. Thomas, & D. Thomas, "Mars Transport Optimization," Joint Army Navy NASA Air Force (JANNAF) Joint Subcommittee Meeting, Long Beach, California, May 21-24, 2018.

A. Aueron, D. Thomas, & J. Cassibry, "Analytical Radiation Attenuation and Heat Deposition Modeling for Conceptual Design of Nuclear Thermal Rockets," AIAA Propulsion & Energy Forum, Cincinnati, Ohio, July 9-11, 2018. https://doi.org/10.2514/6.2018-4954

A. Bower & D. Thomas, "Liquid Rocket Engine Production Process Modelling," Joint Army Navy NASA Air Force (JANNAF) Joint Subcommittee Meeting, Long Beach, California, May 21-24, 2018.

A. Bower & D. Thomas, "Creating an Affordability Model for the RS-25 Liquid Rocket Engine," AIAA Propulsion & Energy Forum, Cincinnati, Ohio, July 9-11, 2018.

M. Gethers & D. Thomas, "A Method for Robust Requirements Definition," 16th Conference on Systems Engineering Research (CSER), Charlottesville, Virginia, May 8-9, 2018. https://doi.org/10.1007/978-3-030-00114-8_30

M. Gethers & D. Thomas, "Utilization of Goal Function Trees for Robust Requirements Definition," INCOSE International Symposium, Washington, DC, July 7-12, 2018. https://doi.org/10.1002/j.2334-5837.2018.00500.x

V. Lopez & D. Thomas, "Complexity metrics suite for systems modelled using SysML," 16th Conference on Systems Engineering Research (CSER), Charlottesville, Virginia, May 8-9, 2018.

A. Aueron and D. Thomas, "Nuclear Thermal Propulsion System Modeling using Model Based Systems Engineering," Joint Army Navy NASA Airforce (JANNAF) In-Space Chemical Propulsion Technical Interchange Meeting, Huntsville, Alabama, April 4-6, 2017.

A. Aueron and D. Thomas, "Modeling Nuclear Thermal Propulsion with Model Based Systems Engineering," AIAA Space 2017 Conference & Exposition, Orlando, Florida, September 12-14, 2017.

E. Patterson and D. Thomas, "Human Mental Models and their effects on human and system interactions within Socio-Technical Systems," 15 th Conference on Systems Engineering Research, Los Angeles, California, March 23-25, 2017.

L. Walker & D. Thomas, "Integrated system modeling in SysML for Small Satellites," AIAA SciTech 2017, Grapevine, Texas, January 9-13, 2017. https://doi.org/10.2514/6.2017-1769

D. Thomas and B. Mesmer, "Virtual Systems Integration using Model Based Systems Engineering," AIAA Space 2016, Long Beach, California, September 13–16, 2016. https://doi.org/10.2514/6.2016-5311