Changhun Lee

ORCID: 0000-0003-2722-7400
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About
Contact & Profiles
Research Areas
  • Recommender Systems and Techniques
  • Video Analysis and Summarization
  • Topic Modeling
  • Nutritional Studies and Diet
  • Multimodal Machine Learning Applications
  • Big Data and Business Intelligence
  • Diet and metabolism studies
  • Human Mobility and Location-Based Analysis
  • Obesity, Physical Activity, Diet
  • Semantic Web and Ontologies
  • Dietetics, Nutrition, and Education
  • Digital Transformation in Industry
  • Image Retrieval and Classification Techniques
  • Child Nutrition and Feeding Issues
  • Nutrition, Genetics, and Disease
  • Blockchain Technology Applications and Security

Ulsan National Institute of Science and Technology
2018-2022

In this work, we introduce a novel approach called Scaling to Emphasize Attention for Long-context retrieval (SEAL), which enhances the performance of large language models (LLMs) over extended contexts. Previous studies have shown that each attention head in LLMs has unique functionality and collectively contributes overall behavior model. Similarly, observe specific heads are closely tied long-context retrieval, showing positive or negative correlation with scores. Built on insight,...

10.48550/arxiv.2501.15225 preprint EN arXiv (Cornell University) 2025-01-25

Diet planning in childcare centers is difficult because of the required knowledge nutrition and development as well high design complexity associated with large numbers food items. Artificial intelligence (AI) expected to provide diet-planning solutions via automatic effective application professional knowledge, addressing optimal diet design. This study presents results evaluation utility AI-generated diets for children provides related implications.We developed 2 AI aged 3-5 yrs using a...

10.4162/nrp.2022.16.6.801 article EN Nutrition Research and Practice 2022-01-01

Diet planning is a basic and regular human activity. Previous studies have considered diet combinatorial optimization problem to generate solutions that satisfy diet's nutritional requirements. However, this approach does not consider the composition of diets, which critical for recipients' accept enjoy menus with high quality. Without consideration, feasible could be provided in practice. This suggests necessity machine learning, extracts implicit patterns from real data applies these when...

10.1145/3447548.3467201 article EN 2021-08-13

With the current advancements in mobile and sensing technologies used to collect real-time data offline stores, retailers wholesalers have attempted develop recommender systems enhance sales customer experience. However, existing studies on primarily focused e-commerce platforms other online services. They did not consider unique features of indoor shopping real stores such as physical environments objects, which significantly affect movement purchase behaviors customers, thereby...

10.1145/3534678.3539199 article EN Proceedings of the 28th ACM SIGKDD Conference on Knowledge Discovery and Data Mining 2022-08-12
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