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Jim Gaffney

Physicist

Education

Affiliations

Bio

Jim Gaffney is a physicist specializing in simulations of complex systems like materials under extreme conditions, high energy density physics and inertial confinement fusion. Much of his work is aimed at improving these models using experimental data, via Bayesian calibration and uncertainty quantification - often with novel deep learning methods and high performance computing resources in the mix. In the COVID era, Dr Gaffney has been adapting these methods to understand disease spread in small populations like Army units and schools; he has written several simulation software packages with this in mind.

Preferred Pronouns

He/him/his

Personal Academic Website

Research/Topics of Interest

Agent-based models
Compartmental models
Machine learning models
New methods development
Statistical models

Pathogens/Diseases of Main Interest/Expertise

COVID-19

Countries of Work/Collaboration

United States

Projects

Papers

Hatfield PW, Gaffney JA, Anderson GJ, Ali S, Antonelli L, Başeğmez du Pree S, Citrin J, Fajardo M, Knapp P, Kettle B, Kustowski B, MacDonald MJ, Mariscal D, Martin ME, Nagayama T, Palmer CAJ, Peterson JL, Rose S, Ruby JJ, Shneider C, Streeter MJV, Trickey W, Williams B. (2021). The data-driven future of high-energy-density physics. Nature, 593(7859)

Thiagarajan JJ, Venkatesh B, Anirudh R, Bremer PT, Gaffney J, Anderson G, Spears B. (2020). Designing accurate emulators for scientific processes using calibration-driven deep models. Nature communications, 11(1)

Kritcher AL, Swift DC, Döppner T, Bachmann B, Benedict LX, Collins GW, DuBois JL, Elsner F, Fontaine G, Gaffney JA, Hamel S, Lazicki A, Johnson WR, Kostinski N, Kraus D, MacDonald MJ, Maddox B, Martin ME, Neumayer P, Nikroo A, Nilsen J, Remington BA, Saumon D, Sterne PA, Sweet W, Correa AA, Whitley HD, Falcone RW, Glenzer SH. (2020). A measurement of the equation of state of carbon envelopes of white dwarfs. Nature, 584(7819)

Zhang S, Militzer B, Gregor MC, Caspersen K, Yang LH, Gaffney J, Ogitsu T, Swift D, Lazicki A, Erskine D, London RA, Celliers PM, Nilsen J, Sterne PA, Whitley HD. (2018). Theoretical and experimental investigation of the equation of state of boron plasmas. Physical review. E, 98(2-1)

Popmintchev D, Hernández-García C, Dollar F, Mancuso C, Pérez-Hernández JA, Chen MC, Hankla A, Gao X, Shim B, Gaeta AL, Tarazkar M, Romanov DA, Levis RJ, Gaffney JA, Foord M, Libby SB, Jaron-Becker A, Becker A, Plaja L, Murnane MM, Kapteyn HC, Popmintchev T. (2015). Ultraviolet surprise: Efficient soft x-ray high-harmonic generation in multiply ionized plasmas. Science (New York, N.Y.), 350(6265)

Hickstein DD, Dollar F, Gaffney JA, Foord ME, Petrov GM, Palm BB, Keister KE, Ellis JL, Ding C, Libby SB, Jimenez JL, Kapteyn HC, Murnane MM, Xiong W. (2014). Observation and control of shock waves in individual nanoplasmas. Physical review letters, 112(11)

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