Ji-Woo Song

NLP Researcher

About Me

Hi, my name is Ji-Woo Song, and I am a graduate student in Artificial Intelligence at Konkuk University. I am currently conducting research at the NLP Lab, focusing on Natural Language Processing (NLP) and Large Language Models (LLMs).

Currently, my research interests include mitigating hallucinations in LLMs, reinforcement learning (RL), and improving retrieval-augmented generation (RAG) search performance.

During my undergraduate studies, I conducted research on feature selection using genetic algorithms and machine learning for healthcare applications.

I am proficient in Python and AI/ML tools (e.g., PyTorch, vLLM, scikit-learn) with hands-on lab research experience, and have light experience with web development and data engineering.

Education

Konkuk University

M.S. Artificial Intelligence

March 2025 - Present

I am pursuing an M.S. in Artificial Intelligence, taking a comprehensive AI curriculum across core areas and developing a strong focus on NLP. Current GPA: 4.5/4.5.

Gachon University

B.S. Computer Science

March 2019 - February 2025

Conducted machine learning research and AI-related projects, graduating with a major GPA of 4.08/4.5 and an overall GPA of 4.00/4.5. In addition to AI, gained broad experience in computer science, including web development, SQL, Linux, and data analysis.

Experience

Konkuk University NLP Lab

Graduate Researcher

January 2025 - Present

http://nlp.konkuk.ac.kr/

Conducting research on NLP, LLM, and hallucination mitigation in multi-modal (VLM) models.

As a graduate researcher at the NLP Lab, I focus on enhancing the performance of Large Language Models (LLMs) and multi-modal Vision-Language Models (VLMs) by mitigating hallucination issues. My work involves fine-tuning pre-trained models, optimizing retrieval-augmented generation (RAG) methods, and developing novel approaches to improve model reliability.

Gachon University Algorithm Lab

Ungraduate Researcher

December 2023 - December 2024

https://ce.gachon.ac.kr/alogrithm-lab

Conducted research on feature selection using genetic algorithms to improve machine learning-based sarcopenia prediction.

Focused on applying genetic algorithms for feature selection in sarcopenia prediction models. Processed survey data from the KLoSA dataset, reducing features while improving model performance. Evaluated logistic regression, XGBoost, and random forest classifiers to assess the effectiveness of selected features.

Paper

Geon Park*, Jiwoo Song*, Gihyeon Choi*, Juoh Sun*, and Harksoo Kim (*co-first author)

Introduced automatic evaluation systems leveraging GPT-4.1 to assess AI tutor responses across four pedagogical dimensions: Mistake Identification, Mistake Location, Providing Guidance, and Actionability. Achieved macro F1 scores of 58.80% (Mistake Location, ranked top-3) and 56.06% (Providing Guidance, ranked top-5), demonstrating effectiveness in evaluating educational response quality.

An Embedding-Based Dynamic Few-Shot PromptingStrategy for Solving Multimodal Math Problems

Proceedings of the Korea Computer Congress 2025 (KCC 2025), KIISE; pp. 560–562; July 1–4, 2025.

Jiwoo Song*, Juoh Sun, and Harksoo Kim (*1st author)

Proposed a dynamic few-shot prompting strategy that retrieves relevant examples via embedding-based similarity between visual and textual features. The method improves reasoning and diagram interpretation in multimodal math problem solving, achieving 50.68% accuracy with GPT-4.1-mini and outperforming zero-shot, static, and random few-shot baselines.

Projects

AI Skincare Assistant Service

https://github.com/Computer-skunks

An AI service for acne detection and skin type classification using YOLOv8 and EfficientNet.

Developed an AI-powered skincare assistant that detects acne count and classifies skin types using YOLOv8 and EfficientNet. Implemented both a mobile app and a web version.

A Little More About Me

Alongside my interests in AI and software engineering some of my other interests and hobbies are:

  • Playing & Watching FootBall(Real Madrid)
  • Playing & Watching BaseBall(New York Yankees)
  • Playing & Watching LOL(SKT T1)