Sen Zhang

2 papers indexed

arxivcs.HC2026-07-10

KnitID: Machine-Knitted RFID Antennas for Battery-Free Authentication, Localization and Interaction

Weiye Xu, Yue Xu, Devin Murphy, Sen Zhang, Te-yen Wu, Yiyue Luo

Battery-free RFID systems offer a scalable and maintenance-free approach to interaction. We present KnitID, a machine-knitted textile RFID antenna design that enables on-body authentication, localization, and interaction. Unlike prior antenna designs, KnitID achieves a compact an…

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arxivcs.AI2026-06-29

SafePyramid: A Hierarchical Benchmark for In-context Policy Guardrailing

Jiacheng Zhang, Haoyu He, Sen Zhang, Shen Wang, Xiaolei Xu, Yuhao Sun, et al.

In real-world applications, guardrails are often expected to identify unsafe user-model interactions according to application-specific safety policies, rather than relying on predefined risk taxonomies. In this work, we study this setting under the paradigm of in-context policy g…

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