Daily AI Papers Briefing (2026-04-21)

【本日の論文】1. Elucidating the SNR-t Bias of Diffusion Probabilistic Models https://huggingface.co/papers/2604.160442. Maximal Brain Damage Without Data or Optimization: Disrupting Neural Networks via Sign-Bit Flips https://huggingface.co/papers/2502.074083. PersonaVLM: Long-Term Personalized Multimodal LLMs https://huggingface.co/papers/2604.130744. Web Retrieval-Aware Chunking (W-RAC) for Efficient and Cost-Effective Retrieval-Augmented Generation Systems https://huggingface.co/papers/2604.049365. Qwen3.5-Omni Technical Report https://huggingface.co/papers/2604.15804