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koyojin/README.md

Hi, I'm Yoonjin

Interested in data-driven decision making, LLM, and explainable AI.
Always passionate, thoughtful, and goal-oriented.


πŸ† Awards

Award Project Description Date
Grand Prize
7th Education Public Data Analysis Competition
(Ministry of Education, Korea)
XAI-based Framework for Identifying Drivers of Private Education and Optimizing Public Learning Resource Allocation Analyzed private education demand across 44 administrative regions in Gyeonggi-do. Applied PCA + KMeans, transformed clustering into supervised learning, interpreted drivers using XGBoost + SHAP, and optimized public learning resource allocation via P-median and MCLP models. Deployed a Streamlit-based decision support service. JUL 2025
Bronze Prize
Smart Maritime Logistics Γ— AI Mission Challenge
(Ministry of Oceans and Fisheries, Korea)
Ship Trajectory Restoration for AIS Data Loss using Bi-LSTM Processed approximately 280,000 AIS trajectory records and developed a Bi-LSTM-based time series model to restore missing vessel trajectories under real-world AIS signal loss conditions. DEC 2025
Excellence Award
2024 Big Data Campus Competition
(Seoul Metropolitan Government)
Urban & Social Data Analysis Project Conducted exploratory data analysis and feature engineering for public-sector policy insights. OCT 2024
Encouragement Award
3rd Gangseo Big Data Analysis Idea Competition
(Gangseo-gu Office, Seoul)
Local Policy Data Analysis Proposal Proposed a data-driven analysis idea addressing local administrative challenges with a focus on practical applicability. JUN 2024

πŸš€ Projects

Project Description Period
Mirae Asset Securities AI Festival β€” Investment Information LLM Agent Designed an LLM-based agent to support investment decision-making. Collected and structured U.S. stock market reports and financial news, extracted representative issue keywords via text processing and topic modeling, and implemented RAG for context-aware responses. JUL 2025 – AUG 2025
AI Agent for On-Campus Information Support for International Students Developed an AI agent based on Llama 3.2 to assist international students with campus-related information, focusing on intent detection and concise response generation. DEC 2024
β€œRoutinee” β€” Learning Routine Management App & Academy-Integrated Service Backend development for an iPad-based learning routine management application. Designed RESTful APIs using Django & DRF and implemented a MySQL-based data model reflecting real-world academy operations. JAN 2025 – PRESENT
XAI-based Analysis of Interest Rate Changes during the Pandemic Analyzed household-level asset and liability changes during COVID-19 using machine learning models with XAI-based interpretation. (Journal submission under review) AUG 2025 – OCT 2025
Root Cause Analysis for Surface Image Anomaly Detection University project applying Grad-CAM to CNN-based models for interpreting anomaly detection results and identifying failure patterns. DEC 2025
Content-Based Filtering Recommendation System using Personal Wardrobe Items Built a recommendation system using content-based filtering, modeling item attributes and user preferences to generate personalized outfit suggestions. JUN 2025 – JUL 2025

πŸ”¬ Research Experience

Organization Role Description Period
Kyung Hee University β€” Technology & Data Intelligence Lab Undergraduate Research Assistant Participated in data-driven research projects involving AI and applied analytics, supporting experimental design, data preprocessing, and analysis. JUL 2025 – DEC 2025

🧭 Leadership & Activities

Organization Position Period
Kyung Hee University β€” CAPTIMA (Computer Science Academic Club) President MAR 2024 – FEB 2025
Kyung Hee University β€” KHUDA (Data Analytics / AI Central Club) Data Business Track Lead JAN 2025 – DEC 2025
Kyung Hee University β€” KHUDA NLP Track Program Completion JUL 2024 – NOV 2024

πŸ›  Technical Skills

Category Skills
Programming & ML Python, scikit-learn, PyTorch
Backend & Data Django, Django REST Framework, SQL, MySQL
AI / NLP Text Processing, Topic Modeling, LLM Fine-tuning (SFT), Retrieval-Augmented Generation (RAG)
Deployment AWS EC2, Docker
Collaboration Git, GitHub, Slack, Notion

πŸ“œ Certifications

Certification Issued By Date
SQL Developer (SQLD) Korea Data Agency DEC 2022
Advanced Data Analytics Semi-Professional (ADsP) Korea Data Agency SEP 2023
Computer Specialist in Spreadsheet & Database Level-1 HRDK Korea MAY 2023

🌍 Languages

Language Proficiency Notes
Korean Native β€”
English Professional Proficiency KATUSA (JUL 2022 – JAN 2024), OPIc Advanced Low, TOEIC 935

πŸ“« Contact

Pinned Loading

  1. 6th-NLP_KHUrious 6th-NLP_KHUrious Public

    Forked from khuda-data/6th-NLP_KHUrious

    KHUrious:κ²½ν¬λŒ€μ˜ Curiousν•œ 정보λ₯Ό μ•Œλ €μ€„κ²Œ

    Jupyter Notebook

  2. Algorithm Algorithm Public

    This is a auto push repository for Baekjoon Online Judge created with [BaekjoonHub](https://github.com/BaekjoonHub/BaekjoonHub).

    Python

  3. koyojin.github.io koyojin.github.io Public

    Still in progress

    Ruby