Karl Stratos

Karl Stratos [cv] Apple Foundation Models Expertise: machine learning, natural language processing Email: karlstratos@gmail.com (My legal name used to be Jang Sun Lee.)

Bulletin board

• A timeline of research areas
  • (2024-present) Foundation models: optimizers (e.g., Muon), scale invariance
  • (2019-2024) Entity-centric language understanding: retrieval, entity linking, coreference resolution
  • (2017-2020) Maximal mutual information: tag induction, estimation theory, structured representations
  • (2011-2016) Spectral methods: Brown clustering, word embeddings, sequence labeling
• I have a note on pursuing a PhD (from around 2021), which you may still find useful.

Bio

I completed a PhD in computer science at Columbia University in 2016, advised by Dr. Michael Collins. I was a senior research scientist at Bloomberg LP (2016-2017), an adjunct assistant professor at Columbia University (2017), a research assistant professor at Toyota Technological Institute at Chicago (2017-2019), an assistant professor at Rutgers University (2019-2024), and a member of technical staff at Essential AI (2024-2025).