Ophthalmic clinical decision support requires fast, accurate, and privacy-preserving inference, yet autoregressive large language models (LLMs) incur substantial latency and computational overhead for decisions among predefined actions. We therefore investigate a decision-oriented alternative to generative reasoning. S...
Bo Liu, Lian-Yu Wang, Meng Wang et al.· 1 citation
This paper studies the local geometry of semantic meaning in large language models. Current representation analyses ask whether meanings are close in embedding space, or whether linear probes separate semantic classes, but they do not characterize the within-concept local geometry: what is invariant across realizations...
Text embedding and text generation are two of the most useful capabilities of modern large language models, yet they are typically provided by separate specialized models (an embedder and a generator) trained with incompatible objectives and deployed side by side in retrieval-augmented generation and agent systems. Rec...
Yang Liu, Zhi-Qiang Yuan, Shu-Dong Huang et al.· 0 citations
Large language models (LLMs) deployed in mental-health contexts can be evaluated for safety failures, but the resulting judgments are often difficult to inspect or explain. Common approaches to improving safety rely on prompt engineering, LLM-as-a-Judge, and Constitutional AI. In this work, we describe a clinician-led...
Chenhan Lyu, Kit Wislocki, Sarah Elizabeth Stoeckl et al.· 0 citations
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Singular-value spectra encode important structure in transformer feed-forward projections, yet their causal role in downstream behavior remains underexplored. We study post-hoc spectral smoothing and spiking interventions on the up_proj and down_proj matrices. Positive perturbation stretches deviations from the geometr...
We present Protegrity-PII, a new PII decision model for structured and unstructured text. Protegrity-PII achieves a typed recall of 0.915 with a precision of 0.907 on a new benchmark we propose, PII-SCOPE. Our model processes text in 0.49 seconds per million characters at \$0.0005 per million characters on a single RTX...
Hardeep Bassi, Hui Ma, Lu\'is Seabra et al.· 0 citations
It is shown that similar aggregate scores can conceal substantial changes in individual verdicts, both when the same setup is repeated and when the instructions change.
Self-Assessment Reinforcement Learning (SARL), a reinforcement learning framework in which models learn to recognize their own search state during training and improve their search behavior accordingly, without requiring additional assessment at test time, outperforms methods built on auxiliary supervision or multi-age...
Taewhoo Lee, Min-Ju Song, Jungwoo Park et al.· 0 citations
MemPlan is proposed, a memory-conditioned PDDL planning framework for partially observable interactive text environments, which improves task completion and step efficiency over language-only and PDDL-aware baselines, while substantially reducing online token cost compared with LLM-planning baselines such as ReAct.
Model fusion aims to integrate the capabilities of multi-expert models into a single model. Existing evaluations offer limited coverage of reasoning with long chains of thought and tool use, while strong average performance can mask substantial losses in individual expert capabilities. We introduce FusionEval, a benchm...
Shuo Cai, Yang-Gan Gu, Yuhang Liu et al.· 0 citations
Many Indian banks serve customers through FAQ pages and scripted chatbots. Assistants based on language models could respond faster and carry out requests such as blocking a card, but only if they give correct information and follow the bank's rules. These rules prescribe a procedure, a set of required steps, such as o...
This work presents the first digital assistant named Lighthouse, the first digital assistant named Lighthouse--commonly called a chatbot--for exploring the Civil Rights period of the United States using data from South Carolina.
John A. Aydin, Angela Williams, Steven Dindl et al.· 0 citations