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Young-Koo Lee

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Open access 2026

Semantic Skyline: Multi-Embedding Skyline Query Processing for RAG Workloads in Vector Databases

Retrieval-Augmented Generation (RAG) systems and modern vector databases rely on embedding representations to retrieve semantically relevant entities. However, many real-world applications require multi-criteria query processing, where users express preferences across multiple semantic dimensions rather than a single n...

Md Arif Rahman, Taeyeon Kim, Shayhan Ameen Chowdhury et al. · IEEE Access · 0 citations

Review Open access 2026

GPU-Accelerated Sparse Matrix-Dense Matrix Multiplication for Graph Neural Networks: A Comprehensive Survey

It is found that no single kernel dominates across all graph structures and that effective Tensor Core utilization reaches only 5–20% on irregular GNN matrices, while graph reordering is broadly beneficial, yielding gains of up to $43\times $ when it enables Sparse Tensor Core execution.

Tariq Habib Afridi, Muhammad Numan Khan, Young-Koo Lee · IEEE Access · 0 citations