# Corresponding Author

1. Near-Surface Defect Detection in Ultrasonic Testing Using Domain-Knowledge- Informed Self-supervised Learning
   M. S. Jeon, M. S. Choi, W. J. Choi, J. M. Ha#, and H. S. Oh#,
   Ultrasonics, Vol 147, 2025  (IF 3.8, JCR Rank 11.2%)  [Link]
   
   

2. Enhancing Gearbox Fault Diagnosis Under Phase Estimation Errors: A Dynamic Time Warping and Blind Deconvolution Approach
   T. H. Kim, J. M. Park, J. O. Yoo, J. M. Ha# and B. D. Youn#
   Journal of Sound and Vibration (JSV), Vol 598, 2025 (IF 4.3, JCR Rank 6.2%)  [Link]
   
   

3. Fault frequency Band Segmentation and Domain Adaptation with Fault Simulated Signal for Fault Diagnosis of Rolling Element Bearings
   J. M. Park, J. O. Yoo, T. H. Kim, M. J. Kim, J. H. Park, J. M. Ha# and B. D. Youn#
   Journal of Computational Design and Engineering (JCDE), Online Published, 2024 (IF 4.8, JCR Rank 11.3%)  [Link]
   
   

4. Weighted multi-order Viterbi algorithm (WMOVA): Instantaneous angular speed estimation under harsh conditions
   J. O. Yoo, J. M. Park, T. H. Kim, J. M. Ha# and B. D. Youn#
   Mechanical Systems and Signal Processing (MSSP), Vol 211, 2024 (IF 7.9, JCR Rank 2.5%)  [Link]
   
   

5. Domain knowledge-informed Synthetic fault sample generation with Health Data Map for cross-domain Planetary Gearbox Fault Diagnosis
   J. M. Ha and O. Fink
   Mechanical Systems and Signal Processing (MSSP), Vol 202, 2023 (IF 8.4, JCR Rank 3.3%)  [Link]
   
   

6. Multi-head De-noising Autoencoder based Multitask (MDAM) model for fault diagnosis of rolling element bearings under various speed conditions
   J. M. Park, J. O. Yoo, T. H. Kim, J. M. Ha#, and Byeng D. Youn#
   Journal of Computational Design and Engineering (JCDE), Vol 10 (4), 2023 (IF: 4.9)  [Link]
   
   

7. Robust deep learning-based fault detection of planetary gearbox using enhanced health data map (enHDMap) under domain shift problem
   T. W. Hwang, J. M. Ha#, and B. D. Youn#
   Journal of Computational Design and Engineering (JCDE), Vol 10 (4), 2023 (IF: 4.9)  [Link]
   
   

8. Thickness evaluation of Cr coating fuel rod using encircling ECT sensor
   J. W. Park, J. M. Ha, H. M. Seung, H. Jang, and W. Choi#
   Nuclear Engineering and Technology, Vol 54 (9), 2022 (IF 2.81, JCR Rank 16.2%)  [Link]
   
   

9. Extremely low frequency wave localization via elastic foundation-induced metamaterial with a spiral cavity
   M. Ha Bae, W. Choi, J. M. Ha, M. Kim, and H. M. Seung
   Scientific Reports, Vol 12 (1), 2022 (IF 4.99)  [Link]
   
   

10. Autoencoder-based detection of near-surface defects in ultrasonic testing
    J. M. Ha, H. M. Seung, W. J. Choi#
    Ultrasonics, Vol 119, 2022 (IF 4.06, JCR Rank 17.187%)   [Link]
    
    

11. Fault Diagnosis of a Planetary Gearbox by Dnorm-based Time Synchronous Averaging (DTSA) Encapsulating Results from Multiple Minimum Entropy Deconvolution (MED) Filters
    J. M. Ha, B. D. Youn#
    Journal of Sound and Vibration (JSV), 2022 (IF 4.76, JCR Rank 10.94%)  [Link]
    
    

12. Cepstrum-assisted empirical wavelet transform (CEWT)-based improved demodulation analysis for fault diagnostics of planetary gearboxes
    Y. H. Kim, J. M. Ha, K. M. Na, J. H. Park, and B. D. Youn#
    Measurement, Vol 183, 2021 (IF 3.927, JCR Rank 17.97%)   [Link]
    
    

13. A Health Data Map-Based Ensemble of Deep Domain Adaptation under Inhomogeneous Operating Conditions for Fault Diagnosis of a Planetary Gearbox
    J. M. Ha and B. D. Youn#
    IEEE Access, Vol 9, 2021 (IF 3.367)  [Link]
    
    

14. A Positive Energy Residual (PER) based Planetary Gear Fault Detection Method under Variable Speed Conditions
    J. H. Park, M. Hamadache, J. M. Ha, Y. H. Kim, K. M. Na, B. D. Youn#
    Mechanical Systems and Signal Processing (MSSP), Vol 117, 2019 (IF 6.47, JCR Rank 3.46%)  [Link]
    
    

15. Tooth-wise Fault Identification for a Planetary Gearbox Based on a Health Data Map
    J. M. Ha, J. H. Park, K. M. Na, Y. H. Kim, B. D. Youn#
    IEEE Transactions on Industrial Electronics (IEEE TIE), Vol 65 (7), 2018 (IF 7.05, JCR Rank 0.82%)  [Link]
    
    

16. Classification of operating conditions of wind turbines for a class-wise condition monitoring strategy
    J. M. Ha, H. S. Oh, J. H. Park, B. D. Youn#
    Renewable Energy, Vol 103, 2017 (IF 4.357)  [Link]
    
    

17.  Model-Based Fault Diagnosis of a Planetary Gear: A Novel Approach Using Transmission Error
    J. H. Park, J. M. Ha, H. S. Oh, B. D. Youn#, J. H. Choi, N. H. Kim
    IEEE Transactions on Reliability, Vol 25 (4), 2016 (IF 2.79)  [Link]
    
    

18. Autocorrelation-based time synchronous averaging for condition monitoring of planetary gearboxes in wind turbines
    J. M. Ha, B. D. Youn#, H. S. Oh, B. Han, Y. Jung, J. H. Park
    Mechanical Systems and Signal Processing (MSSP), Vol 70-71, 2016 (IF 4.37, JCR Rank 5.08%)  [Link]
    
    

19. A Probabilistic Detectability-Based Sensor Network Design Method for System Health Monitoring and Prognostics
    P. Wang, B. D. Youn#, C. Hu, J. M. Ha and B. Jeon
    Journal of Intelligent Material Systems and Structures, Vol 25 (9), 2015 (IF 1.96)  [Link]

International Journal (SCOUPUS)

1.  H. J. Kim, J. M. Ha, J. H. Park, S. U. Kim, K. S. Kim, B. C. Jang, H. S. Oh and B. D. Youn#, “Fault Log Recovery Using an Incomplete data-trained FDA Classifier for Failure Diagnosis of Engineered Systems,” International Journal of Prognostics and Health Management, Vol 7, 2016

Domestic Journal

# Corresponding Author

1. 하종문, "Minimum Entropy Deconvolution(MED) 필터의 유사도 기반 시간동기평균화를 통한 회전설비 결함진단," 한국비파괴검사학회지, 제 43권 (4), 2023
   (J. M. Ha, “Fault Diagnosis of Rotating Machinery using Similarity-based Time Synchronous Averaging of a Minimum Entropy Deconvolution (MED)-Filtered Signal,” Journal of the Korean Society for Nondestructive Testing Vol 43 (4), 2023)

2. 최용락, 김창희, 이재범, 최원재, 승홍민, 박노철, 하종문#, "물리 정보 기반 인공지능을 활용한 기어박스 고장진단," 한국비파괴검사학회지, 제 43권 (4), 2023
   (Y. R. Choi, C. H. Kim, J. B. Lee, W. J. Choi, H. M. Seung, N. C. Park, and J. M. Ha#, “Fault Diagnosis of a Gearbox using Physics-information-based Artificial Intelligence,” Journal of the Korean Society for Nondestructive Testing Vol 43 (4), 2023)

3. 하종문, 박정호, 오현석, 윤병동, "풍력발전기 유성기어박스의 진동 변조 특성을 고려한 진동기반 고장진단 기법 고찰," 기계저널 A, 제 29권 (7), 2015
   ( J. M. Ha, J. H. Park, H. S. Oh and B. D. Youn#, “A Vibration-based Fault Diagnostics Technique for the Planetary Gearbox of Wind Turbines Considering Characteristics of Vibration Modulation,” Trans. Korean Soc. Mech. Eng. A, Vol.39 (7), 2015)

4. 하종문, 최승혁, 윤병동, 한봉태, 오현석, "고장 진단 및 예지를 위한 풍력 운행데이터의 최적분류 및 관리기법," 풍력에너지저널, 제4권, 제2호, 2013
   (J. M. Ha, S. H. Choi and B. D. Youn#, B. T. Han, H. S. Oh “A Strategic Study on Data Classification and Management for Optimal Condition Monitoring System in Wind Turbines,” Korea Wind Energy Association (KWEA), Vol.4 (2), 2013)

Patent

Application

1. 하종문, 최원재, 박춘수, 승홍민, 박준형, "위상배열 초음파검사 영상에 결함을 레이블링하는 방법 및 장치, 대한민국, 10-2022-0100468, 22. 08. 11
   (J. M. Ha, W. J. Choi, C. S. Park, H. M. Seung, J. H. Park, "Method and apparatus for labeling ultrasound images", KR, 10-2022-0100468, 22. 08. 11)

2. J. M. Ha, H. M. Seung, W. J. Choi, “Ultrasonic non-destructive inspection method and system using deep learning and auto-encoder-based predictive model learning method used therein”, PCT/KR2022/004811, 22. 04. 04, US 17776909, 22. 05. 13

Registration

1.  하종문, 윤병동, 최원재, 승홍민, "D-norm 기반 시간 동기 평균 기법에 의한 회전체 고장 진단 시스템 및 방법,"  대한민국, 10-2619799,  23. 12. 27
   (J. M. Ha, B. D. Youn, W. J. Choi, H. M. Seung, The system and method for D-norm based time-synchronous averaging for diagnosing faults of rotation body, KR, 10-2619799, 23. 12. 27)

2.  하종문, 최원재, 승홍민, "딥러닝을 이용한 초음파 비파괴 검사방법 및 시스템과 이에 사용되는 오토 인코더 기반의 예측모델 학습방법", 대한민국, 10-2497000, 23.02.02
   (J. M. Ha, W. Choi, H. M. Hong, “Ultrasonic non-destructive inspection method and system using deep learning and auto-encoder-based predictive model learning method used therein”, KR, 10-2497000, 23.02.02)

3. 김광일, 김건, 임동필, 윤병동, 하종문, 박정호, "선회장치의 고장진단 장치 및 방법", 대한민국, 10-2354568, 22. 01. 19
   (G.I. Kim, K. Kim, D. P, Lim, B. D. Youn, J. M. Ha, J. H. Park, "Method and system for detecting fault of swing device", KR, 10-2497000, 23.02.02)

4.  윤병동, 조수호, 공현배, 정준하. 하종문, "하이브리드 피로 균열 성장 예측 방법", 대한민국, 10-2296871, 21.08.26 

(B. D. Youn, S. H. Jo, H. B. Kong, J. H. Jung, J. M. Ha, H. J. Yoon, Y. C. Shin, “Hybrid Fatigue Crack Growth Prediction Method”, KR, 10-2296871, 21.08.26)

5.  박진균, 윤병동, 박정호, 하종문, "산업용 로봇의 고장 진단 시스템", 대한민국, 10-2266220, 21.06.11

(J. K. Park, B. D. Youn, J. H. Park, J. M. Ha, “Fault Diagnosis System of Industrial Robot”, KR, 10-2266220-0000, 21.06.11)

6.  윤병동, 박정호, 하종문, "유성 기어박스의 고장 진단을 위한 진동 특성 데이터 맵 처리장치", 10-2026065, 19.09.23

(B. D. Youn, J. H. Park, J. M. Ha, Y, H. Kim, K. M. Na, “Vibration Characteristics Data Map Processing Apparatus for Diagnosing a Fault of Planetary Gear Box,” KR, 10-2026065, 19.09.23)

7.  윤병동, 박정호, 하종문, "기어의 고장 진단 및 구분 방법", 대한민국, 10-1697954, 16.01.13

(B. D. Youn, J. H. Park, J. M. Ha, “Method for Diagnosing and Classifying Gear Fault”, KR, 10-1697954, 16.01.13)

8.  윤병동, 하종문, "유성기어의 진동신호 추출 장치 및 추출 방법", 대한민국, 10-1622264, 16.05.18

(B. D. Youn, J. M. Ha, “Apparatus and Method for Vibration Signal Extraction of Planetary Gear”, KR, 10-1622264, Korea, 16.05.18)

9.  윤병동, 전병철, 하종문, "풍력발전기 데이터 분류 시스템", 대한민국, 10-1468627, 14.11.27

(B. D. Youn, B. C. Jeon, J. M. Ha, S. H. Choi, J. Won, “Wind Turbine Data Classification System, KR, 10-1468627, 14.11.27)