Fernando Diaz

Associate Professor, CMU. Researcher, Google. Evaluation and design of information retrieval and recommendation systems, including their societal impacts.

[Fernando Diaz @841io]

https://t.co/saHIXS4Wcx

[Hamed Zamani @HamedZamani]

Nice to see GrepSeek #1 in HuggingFace Daily Papers. You should give it a read! https://t.co/36UnH4zejJ

[Fernando Diaz @841io]

the information retrieval community has long known that structured queries provide more precise and surgical interaction with a corpus compared to keywords. together with folks at umass, led by @SalemiAlireza7, we show the effective and efficient use of the same tools by agents.

[Hamed Zamani @HamedZamani]

1/n
Do search agents always need index-based retrievers to work efficiently & effectively?🤔Maybe not, if you TEACH them to interact with the corpus by shell!🤯

GrepSeek, a paradigm for training fast & practical Direct Corpus Interaction Search Agents!🚀
https://t.co/EqR3M5aVtX

[Danny To Eun Kim @TEKnologyy]

🎉 Excited to share a new agent evaluation perspective with our newly accepted #SIGIR2026 paper:
"Evaluation of Agents under Simulated AI Marketplace Dynamics."
https://t.co/463TyQasHa

[Rikiya Takehi 武樋力哉 @rikiyatakehi_jp]

データマイニング分野のトップ会議
WSDM 2026でBest Paper Award (1/799)を受賞しました！🏆

学部生の最後に大きな成果を残せてよかったです！大学院からは海外に進学しますが、向こうでもさらに頑張ります！

[Rikiya Takehi @rikiyatakehi]

Our paper “Diversification as Risk Minimization” received a Best Paper Award at WSDM 2026!! (1/799) 🏆

We tackle the problem of minimizing missing relevant information in a search ranking.

Huge thanks to my collaborators!

For a deeper dive, check out my original thread: 👇

[Fernando Diaz @841io]

Congratulations to @rikiyatakehi on this well-deserved #WSDM2026 Best Paper Award.

He provided the vision and carried the work forward with remarkable maturity.
I very much valued the collaboration with him and @tetsuyasakai.

Sincere thanks to the selection committee.

[Tetsuya Sakai (酒井哲也) @tetsuyasakai]

#wsdm2026 best paper award!
Superundergrad Rikiya... just wow

Many thanks to the selection committee!

[Ahmad Beirami @abeirami]

"Professors definitely deserve to have their names on the papers."

I think this take is completely wrong. Financial support does not warrant co-authorship.

Bob Gallager (a legendary information theorist who retired from MIT) did not co-author any papers with many of his students because he did not believe that he made an intellectual contribution that warranted co-authorship.

The screenshot is from Erdal Arıkan's PhD thesis work that was published in IEEE Trans. Information Theory. Both Erdal and Bob have been honored with the Shannon Award (highest honor in information theory) and they have not co-authored any papers.

[Shaily @shaily99]

Happily surprised to see OpenAI curating cultural benchmarks, especially focused on India.

BUT, cultural knowledge != culturally aligned generations.

My work for 2+ years focuses on cultural competence in generative tasks, like creative writing.

Sharing some papers in LONG 🧵

[Human-Computer Interaction Papers @Smartphones]

Taxonomy of User Needs and Actions. https://t.co/f4F0pAeJNR

[Athiya Deviyani @AthiyaD]

Ever trusted a metric that works great on average, only for it to fail in your specific use case?

In our #NAACL2025 paper (w/ @841io), we show why global evaluations are not enough and why context matters more than you think.
📄 https://t.co/IuLsoqRSnV
#NLP #Evaluation
(🧵1/9)

[Fernando Diaz @841io]

@OpenAI https://t.co/qGhkjfrA2m

[Fernando Diaz @841io]

If you're interested in OpenAI including shopping results, you might also be interested in @TEKnologyy's paper relating retrieval diversity/fairness and generation by downstream RAG models. This has implications for individuals selling products online.
https://t.co/kbDRdE3gP4

[Fernando Diaz @841io]

If you're interested in OpenAI including shopping results, you might also be interested in @TEKnologyy's paper relating retrieval diversity/fairness and generation by downstream RAG models. This has implications for individuals selling products online.
https://t.co/kbDRdE3gP4

[Andrew Drozdov @mrdrozdov]

Today we'll be presenting the Tutorial on Retrieval-Enhanced Machine Learning (REML). Come by to learn about the emerging design patterns in this space and see how retrieval can be used beyond RAG.

In collaboration w/ the amazing @841io @TEKnologyy @SalemiAlireza7 @HamedZamani

[Fernando Diaz @841io]

@mrdrozdov

[Fernando Diaz @841io]

@srush_nlp im thinking about animation. what do you use for this?

[Hal Daumé III @haldaume3]

The AI Interdisciplinary Institute at @UofMaryland (AIM) is hiring

40 new faculty members

in all areas of AI, particularly:
- accessibility,
- sustainability,
- social justice, and
- learning;

building on computational, humanistic, or social scientific approaches to AI.
>

[Willie Agnew | [email protected] @willie_agnew]

I'm on the job market for tt faculty positions! I conduct research to resist harmful tech, data and AI and empower communities to imagine and build better data and AI futures. Please let me know if there are any positions I might be a good fit for!

[Anjali Kantharuban @anjali_ruban]

What a coincidence that we released announcements about LLM bias on the same day! But our conclusions were different - OpenAI found minimal bias while we found significant bias. 👀

Why is this? 🧐

🧵

[Alfredo Gomez @alfresearch]

New Fingerprint Mass Spectrometry Method Paves the Way to Solving the Proteome - https://t.co/3RAibmmtid https://t.co/rB5IcLrawh

[Anjali Kantharuban @anjali_ruban]

Do models personalize results when we ask them to and avoid stereotypes otherwise? No.

Well are they at least transparent about it? Also no…

⚠️ If the model can infer your race you might get racially biased recommendations!

📄 Preprint: https://t.co/vzCadLiG1D

🧵1/8