Christy Bergman

San Francisco, California, United States Contact Info
2K followers 500+ connections

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About

As a Developer Advocate, I use my skills in Python, PyTorch, HuggingFace, Spark, RLlib…

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Experience & Education

  • Zilliz

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Licenses & Certifications

Volunteer Experience

  • SONOMA COUNTY CONSERVATION COUNCIL Graphic

    Data Science Volunteer

    SONOMA COUNTY CONSERVATION COUNCIL

    - Present 4 years 7 months

    Environment

  • DataArts Graphic

    Data Science Advisor, Bay Area Network

    DataArts

    - 2 years

  • DataKind Graphic

    Data Ambassador, Bay Area Chapter

    DataKind

    - 3 years

    Led teams of Data Scientists and coders to solve social change problems. Graph community detection, Geodata mapping, Forecasting for various nonprofit orgs.

Publications

  • Hands-on Reinforcement Learning for Recommender Systems - From Bandits to SlateQ to Offline RL with Ray RLlib

    acm

    See publication

  • Estimation Procedures for Discrete-Event Simulations Using SPSIM

    IBM Technical Report RJ9317, IBM Almaden Research Center, San Jose, CA

    Unavailable online, but looks like it is in the Stanford Library collection. http://searchworks.stanford.edu/view/4637302

    See publication

  • Calculated non-linear magnetic field penetration of Plasma Opening Switches

    IEEE 8th International Conference on High-Power Particle Beams

    We examine magnetic field penetration in the Plasma Opening Switch, exploring, in particular, advective field penetration arising in conjunction with radial density gradients across the cathode anode gap. Our calculations have been completed with the implicit multi-fluid, ANTHEM code. We show favored penetration along a radial density jump, unstable plain wave penetration for a 1/(y-ya+ϵ) density dependence (with y measured from cathode to anode at ya) in planar switches, and the penetration of…

    We examine magnetic field penetration in the Plasma Opening Switch, exploring, in particular, advective field penetration arising in conjunction with radial density gradients across the cathode anode gap. Our calculations have been completed with the implicit multi-fluid, ANTHEM code. We show favored penetration along a radial density jump, unstable plain wave penetration for a 1/(y-ya+ϵ) density dependence (with y measured from cathode to anode at ya) in planar switches, and the penetration of finger-like magnetic field perturbations, when the fill plasma bears initial sinusoidal disturbances on its generator interface.

    See publication

  • ANTHEM Simulation of Plasma Opening Switches

    Proceedings of the IEEE 7th Pulsed Power Conference, Monterey, CA, pp. 11-14, June 1989

    In an effort to work toward a strong basic understanding of the operation of plasma opening switches (POSs), theory and numerical experiment have been compared with the aim of developing a reliable predictive capability. It has been shown that under idealized conditions (with fixed ions) the magnetic field can penetrate the Cartesian plasma as a nonlinear wave with a specified speed. A 2-D numerical study shows (1) Cartesian field accumulation mainly along the dense anode, (2) penetration along…

    In an effort to work toward a strong basic understanding of the operation of plasma opening switches (POSs), theory and numerical experiment have been compared with the aim of developing a reliable predictive capability. It has been shown that under idealized conditions (with fixed ions) the magnetic field can penetrate the Cartesian plasma as a nonlinear wave with a specified speed. A 2-D numerical study shows (1) Cartesian field accumulation mainly along the dense anode, (2) penetration along the interface of a small density jump midway between planar electrodes, (3) favored cathode field penetration when the density rises quadratically toward the anode or is simply constant in cylindrical geometry, and (4) deep `snakelike' field penetration when the density varies in a sinusoidal perturbation with radius.

    Also published by DOE: http://www.osti.gov/energycitations/product.biblio.jsp?osti_id=6139531

    See publication

  • Effects of Vibrations on Javelin Lift and Drag

    International Journal of Sport Biomechanics, Vol.5, Number 9.

    The theory of crossflow aerodynamics is used to estimate the effect of thrower-induced vibrations on javelin mean lift and drag. Vibrations of all modes increase both lift and drag from the vibration-free condition. Percentage increases in lift and drag are largest at small mean angles of attack, large vibrational amplitudes, and large relative wind speeds. Thus the consequences of vibration effects on aerodynamics may be most significant for elite throwers.

    See publication

Projects

  • Milvus Bootcamp

Honors & Awards

  • IBM Consulting Excellence

    -

  • National Merit Commended Scholar

    -

Languages

  • English

    Native or bilingual proficiency

  • French

    Professional working proficiency

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