Research

Publications

Two first-author papers presented at conferences of the Korean Institute of Electrical Engineers.

Research Topics

I presented two first-author conference papers on biomedical signal processing: PPG-based HRV modeling and non-contact FMCW radar cardiac-signal analysis. Both appear in conference proceedings and were presented as posters.

First-Author Publications

First page of the CICS’25 conference proceedings paper showing the title and Hyeong-Rok Ryu as first author

First Author Conference Proceedings Poster Presentation

Conference on Information and Control Systems 2025 · 2025

Classification of Cognitive Task Performance using HRV Features: A Convolutional Neural Network Approach

Hyeong-Rok Ryu, Woo-Seok Kang, Kyung-Ho Kim

This study classifies cognitive task performance from PPG-derived HRV features and evaluates a convolutional neural network approach.

Average AUC: 0.85
F1-Score: 0.82

First author · Poster preparation · Presentation participation

Publication details Official Conference DBpia Paper Code

The DBpia paper page shows the matching title, authors, and pp. 291–292.

First page of the KIEE 2026 Summer Conference FMCW paper showing the title and Hyeong-Rok Ryu as first author

First Author Conference Proceedings Poster Presentation

The 57th KIEE Summer Conference 2026 · 2026

Analysis of Aortic Valve Opening and Closure Using Cardiac Signals Acquired by Non-Contact FMCW Radar

Hyeong-Rok Ryu, Woo-Seok Kang, Kyung-Ho Kim

This study aligns ECG, SCG, and FMCW radar signals to ECG R-peaks and analyzes morphology-based AO/AC candidate timing across 848 corresponding beats.

Concurrent acquisition: 600 s
Corresponding beats: 848

First author · Poster preparation · Presentation participation

Publication details Official Conference Code

I did not find this paper through a DBpia title search on August 1, 2026, so this entry uses the proceedings and conference pages.

Conference & Poster Presentations

CICS’25 (2025.10) and the 57th KIEE Summer Conference (2026.07), both as first author with poster preparation and presentation participation.

Related Code and Projects

PPG–HRV · FMCW Radar

The first paper combines PPG-derived HRV features with a CNN to classify cognitive-task performance. The second aligns concurrent ECG, SCG, and FMCW radar acquisition and compares AO and AC candidate timing around ECG R-peaks.