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Xilun Chen

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#artificial intelligence Preprint Sep 2026

MemLife: Curating and Reasoning over Long-Term Egocentric Video Memories

Long-term egocentric video enables personalized AI assistants to reason about daily life. However, as video histories grow to hundreds of hours spanning months or years, reprocessing raw clips for every query becomes computationally prohibitive. Memory systems offer a scalable alternative by compacting videos into text...

Guang-Zhi Xiong, Xin-Yuan Zhang, Xiao Yang et al. · 0 citations
#natural language process... Preprint Sep 2026

WearableQA: A Benchmark for Health Reasoning over Real-World Wearable Data

WearableQA, a benchmark comprising 4,084 10-option multiple-choice questions constructed from the wearable time series, blood biomarkers, and demographics of 200 real users, provides a realistic and diagnostic benchmark for evaluating LLM reasoning over real-world wearable data.

Ji Soo Lee, Xi-Lun Chen, Pierce Chuang et al. · 0 citations
Jul 2026

Two-Level Meta-Rubrics for Evaluating Open-Ended Generation: GAMUT, a Benchmark for Factual Completeness

A structured meta-rubric framework that captures the grading criteria at authoring time, and fixed mechanical rules compile it into a flat checklist of binary, machine-gradable checks that an LLM judge scores reliably at evaluation time is instantiated.

Xilun Chen, Zhaleh Feizollahi, Ross Goodwin et al. · 0 citations

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