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C. Singh

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#natural language process... Preprint Sep 2026

Register Tokens for Bounded-State Reasoning in Diffusion Language Models

Masked diffusion language models (dLLMs) generate text by iteratively denoising masked tokens with bidirectional attention. Extending reasoning across generation chunks normally requires keeping earlier generated text in context. We ask whether a dLLM can instead continue reasoning after that text is cleared, using onl...

Albert Ge, C. Singh, Yu-Fan Zhuang et al. · 0 citations
#artificial intelligence Preprint Sep 2026

Reinforcement Learning over Patient Trajectories for Clinical Reasoning in EHR Foundation Models

This work proposes a reinforcement learning (RL) fine-tuning framework that treats EHR foundation models as generative policies over patient trajectories, and finds that RL fine-tuning consistently improves over pre-trained backbones and strong baselines.

Yu-Xin Xiao, Sheng Zhang, C. Singh et al. · 0 citations
#natural language process... Preprint Sep 2026

StudentSim: Training LLM-based Student Simulators

This work presents StudentSim, a training framework that turns sparse per-student data into individualized simulators through pooled training followed by per-student specialization, and introduces StudentSimEval, a standardized protocol covering 60 students across chess, second-language English writing, and mathematics...

Ke Yang, Chenglong Wang, Michel Galley et al. · 1 citation
Preprint Jul 2026

Data-Efficient Adaptation of LLMs via Attention Head Reweighting

Experiments on diverse open-source text classification datasets show that AHR can outperform standard baselines like LoRA when learning from limited samples, despite having 200-1000x fewer trainable parameters, as the authors' AHR only modifies ~0.0001% of the model's parameters.

Tuomas P. Oikarinen, Zixiao Chen, Charlotte Siska et al. · 0 citations

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