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Alfy Samuel

5 accepted papers

2026

Alignment-Weighted DPO: A principled reasoning approach to improve alignment

ICLR 2026poster

Recent advances in alignment techniques such as Supervised Fine-Tuning (SFT), Reinforcement Learning from Human Feedback (RLHF), and Direct Preference Optimization (DPO) have improved the safety of large language models (LLMs). However, these LLMs remain vulnerable to jailbreak attacks that disguise…

Cited by 0SourceScholar
2026

EPSVec: Efficient and Private Synthetic Text Generation via Dataset Vectors

ICML 2026poster

High-quality data is essential for modern machine learning, yet many valuable corpora are sensitive and cannot be freely shared. Synthetic data offers a practical substitute for downstream development, and large language models (LLMs) have emerged as powerful engines for generating it. However, exis…

Cited by 0SourceScholar
2026

Uncertainty as Feature Gaps: Epistemic Uncertainty Quantification of LLMs in Contextual Question-Answering

ICLR 2026poster

Uncertainty Quantification (UQ) research has primarily focused on closed-book factual question answering (QA), while contextual QA remains unexplored, despite its importance in real-world applications. In this work, we focus on UQ for the contextual QA task and propose a theoretically grounded appro…

Cited by 0SourcecodeScholar
2025

A Comparison of Independent and Joint Fine-tuning Strategies for Retrieval-Augmented Generation

EMNLP 2025

Retrieval augmented generation (RAG) is a popular framework for question answering that is powered by two large language models (LLMs): an embedding model that retrieves context documents from a database that are relevant to a given question, and a generator model that uses the retrieved context to

Cited by 0SourcePDFScholar
2025

An Automatic Method to Estimate Correctness of RAG

COLING 2025industry

In sectors in where data quality is critical, like finance and healthcare, it is crucial to have confidence in not only the outputs generated by retrieval-augmented generation (RAG) models but also the process followed by the model while arriving at the output. Existing methods, such as hallucinatio…

Cited by 2SourcePDFScholar