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J.D. Zamfirescu
175 posts
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J.D. Zamfirescu
@jdzamfi
I study humans, AI systems, and humans+AI systems as a CS/HCI Prof @ UCLA. PhD ‘25 @ Berkeley. Previously MIT, EtherPad, Google, Stanford.
Loe Angeles
zamfi.net
Joined January 2010
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  • user avatar
    J.D. Zamfirescu
    @jdzamfi
    Oct 8, 2024
    Paraphrasing from David Barstow's super motivating @UCBEPIC keynote: As computer scientists, "is the work you're doing supporting the world of truth? Or is it supporting the world of lies?"
    221
  • user avatar
    J.D. Zamfirescu
    @jdzamfi
    Aug 11, 2024
    Hmm, a journey that delves, you say?
    Image
    222
  • user avatar
    J.D. Zamfirescu
    @jdzamfi
    Apr 22, 2024
    🎉New Preprint! 🎉 @sh_reya led this investigation of challenges in aligning LLM outputs: *people* don't always have clear criteria, and these "squishy" criteria also drift as users tweak prompts + evaluate outputs. Human input critical in guiding co-evolution of prompts & evals!
    user avatar
    Shreya Shankar
    @sh_reya
    Apr 22, 2024
    Evals are arguably the hardest part of LLMOps. LLMs mess up, so we check them w/ other LLMs, but this feels icky. Who validates the validators?? We built an interface to align LLM-based evals with user preferences, learning a lot about why this is hard: arxiv.org/abs/2404.12272
    1.9K
  • user avatar
    J.D. Zamfirescu
    @jdzamfi
    Dec 3, 2023
    LOVE this idea!!
    user avatar
    Emma Pierson
    @2plus2make5
    Jul 19, 2023
    Replying to @2plus2make5
    Finally, this project began as a “paper hackathon”, with 6 of us writing code together for 2 days. It was a fun experiment! We got to know each other (and Trader Joe’s snacks) better (movie theater popcorn = best snack).
    Image
    509
  • user avatar
    J.D. Zamfirescu
    @jdzamfi
    Oct 19, 2023
    Timezone bugs, whee! I wonder what fraction of commit messages are some variant of "fixing timezone issues"...
    188

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