Lightnews — Scholar-powered news

Marios Papachristou @papachristoumarios.bsky.social · Jul 20

Congratulations!!

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Marios Papachristou @papachristoumarios.bsky.social · Jul 12

Glad to have our work be featured by Pitt Swanson School of Engineering!

Amin Rahimian @rahimian.bsky.social · Jul 11

nice piece by Pitt Swanson School of Engineering, showcasing three recent privacy works with @papachristoumarios.bsky.social and @yuxin-pitt.bsky.social - news.engineering.pitt.edu/who-sees-who/

Who Sees Who?

In the comedy Home Alone, a burglar posing as a police officer walks door to door during the holidays to find out which families will be traveling, leaving their empty homes easy prey for a break-in. ...

news.engineering.pitt.edu

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Marios Papachristou @papachristoumarios.bsky.social · May 8

Congratulations!!

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Reposted by Marios Papachristou

Emma Pierson @emmapierson.bsky.social · Apr 25

The US government recently flagged my scientific grant in its "woke DEI database". Many people have asked me what I will do.

My answer today in Nature.

We will not be cowed. We will keep using AI to build a fairer, healthier world.

www.nature.com/articles/d41...

My ‘woke DEI’ grant has been flagged for scrutiny. Where do I go from here?

My work in making artificial intelligence fair has been noticed by US officials intent on ending ‘class warfare propaganda’.

www.nature.com

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Reposted by Marios Papachristou

YY Ahn @yyahn.bsky.social · Apr 24

A simple Keyboard Maestro script to change arxiv.org/pdf/xxxx to arxiv.org/abs/xxxx

I should have set this up years ago... 🥲

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Marios Papachristou @papachristoumarios.bsky.social · Apr 14

The video of the talk is now available online: youtu.be/gzPqQdo6vsU?...

Marios Papachristou

YouTube video by TOC 4 Fairness

youtu.be

Marios Papachristou @papachristoumarios.bsky.social · Apr 11

GeomScale also participates in the Google Summer of Code program, which aims to help students contribute to large open-source projects. It is an amazing opportunity if you want to be involved with open-source scientific software!

FYI: github.com/GeomScale/gs...

GitHub - GeomScale/gsoc25: GeomScale in Google Summer of Code 2025

GeomScale in Google Summer of Code 2025. Contribute to GeomScale/gsoc25 development by creating an account on GitHub.

github.com

Marios Papachristou @papachristoumarios.bsky.social · Apr 11

Volesti is an open-source package for volume computation and sampling in high-dimensional constrained spaces.

High-dimensional constrained sampling has many applications in computational biology, finance, Bayesian inference, differential privacy, runtime verification, and many others.

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Marios Papachristou @papachristoumarios.bsky.social · Apr 11

Delighted to share that our work on the volesti package (github.com/GeomScale/vo...) has been accepted to the JOSS journal (doi.org/10.21105/jos...)! 🎉

GitHub - GeomScale/volesti: Practical volume computation and sampling in high dimensions

Practical volume computation and sampling in high dimensions - GeomScale/volesti

github.com

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Marios Papachristou @papachristoumarios.bsky.social · Apr 11

Paper link: arxiv.org/pdf/2402.10659

Machine Learning Day 2025 | ASU Events

You are invited to Arizona State University’s West Valley campus for the sixth annual Machine Learning Day! This event offers a unique platform for scholars and professionals from Arizona and beyond t...

asuevents.asu.edu

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Marios Papachristou @papachristoumarios.bsky.social · Apr 11

Excited to be giving a talk today at ASU ML day (1.50-2.50 pm MST) on our work with Yuan Yuan on our work on network formation with LLMs, and the same talk on Sunday at the Network Science and Economics Conference at Stanford!

Event Link: asuevents.asu.edu/event/machin...

Machine Learning Day 2025 | ASU Events

You are invited to Arizona State University’s West Valley campus for the sixth annual Machine Learning Day! This event offers a unique platform for scholars and professionals from Arizona and beyond t...

asuevents.asu.edu

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Marios Papachristou @papachristoumarios.bsky.social · Apr 11

Read our latest work published in JOSS (@joss-openjournals.bsky.social)!

Journal of Open Source Software @joss-openjournals.bsky.social · Apr 11

Just published in JOSS: 'volesti: A C++ library for sampling and volume computation on convex bodies' https://doi.org/10.21105/joss.07886

Marios Papachristou @papachristoumarios.bsky.social · Mar 19

Join me next Wednesday at 12pm (noon)—1pm ET for the TOC4Fairness seminar, where I will give an overview of my recent work!

Talk link: toc4fairness.org/toc4fairness...

TOC4Fairness Seminar – Marios Papachristou

Date: Wednesday, March 26th, 2025; 9:00 am – 10:00 am Pacific Time Location: Zoom meeting

toc4fairness.org

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Reposted by Marios Papachristou

Nikhil Garg @nkgarg.bsky.social · Mar 10

*Please repost* @sjgreenwood.bsky.social and I just launched a new personalized feed (*please pin*) that we hope will become a "must use" for #academicsky. The feed shows posts about papers filtered by *your* follower network. It's become my default Bluesky experience bsky.app/profile/pape...

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Reposted by Marios Papachristou

Sophie Greenwood @sjgreenwood.bsky.social · Mar 10

Please repost to get the word out! @nkgarg.bsky.social and I are excited to present a personalized feed for academics! It shows posts about papers from accounts you’re following bsky.app/profile/pape...

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Marios Papachristou @papachristoumarios.bsky.social · Feb 17

Finally, we conduct a survey study involving human participants to assess our system's ability to aggregate preferences and reasoning. Our findings show that the system exhibits strong performance in both dimensions.

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Marios Papachristou @papachristoumarios.bsky.social · Feb 17

Our results indicate efficient coordination with reduced interactions between members and the LLM-based system. The system also effectively refines proposed options over time, ensuring their quality and equity.

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Marios Papachristou @papachristoumarios.bsky.social · Feb 17

We create synthetic employee profiles and simulate conversations at scale, leveraging LLMs to evaluate the system to avoid a costly real-user study.

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Marios Papachristou @papachristoumarios.bsky.social · Feb 17

Our system extracts individual preferences and suggests options that satisfy a significant portion of the members. We apply this system to corporate meeting scheduling.

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Marios Papachristou @papachristoumarios.bsky.social · Feb 17

Therefore, in this work, we ask a question: Can we leverage LLMs to elicit the members’ intents and form mutually agreeable plans?

We propose a system leveraging LLMs to facilitate group decision-making by managing conversations and balancing preferences among individuals.

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Marios Papachristou @papachristoumarios.bsky.social · Feb 17

In this regard, Large Language Models (LLMs) have shown its tremendous potential in extracting intent from free text, handling several constraints, and aggregating multiple inputs.

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Marios Papachristou @papachristoumarios.bsky.social · Feb 17

Several tools have been used to schedule common activities. However, they are not able to handle open-ended preferences beyond strict availability constraints.

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Marios Papachristou @papachristoumarios.bsky.social · Feb 17

Moreover, the members usually have diverse preferences, personal constraints, and social dynamics between them.

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Marios Papachristou @papachristoumarios.bsky.social · Feb 17

In our everyday life, we often face decisions that require collective input. For example, scheduling a gathering or deciding where to go for a group event are frequent tasks that involve back-and-forth group discussions.

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Marios Papachristou @papachristoumarios.bsky.social · Feb 17

I am happy to announce that our paper "LEVERAGING LLMs FOR COLLECTIVE DECISION-MAKING" has been accepted at the ACM CSCW conference! 🎉

This is joint work with Longqi Yang (@ylongqi.bsky.social) and Chin-Chia Hsu and as part of my internship at Microsoft.

Preprint: arxiv.org/abs/2311.04928

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Leveraging Large Language Models for Collective Decision-Making

In various work contexts, such as meeting scheduling, collaborating, and project planning, collective decision-making is essential but often challenging due to diverse individual preferences, varying ...

arxiv.org

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