Il-kyu Ha's Lab

Il-kyu Ha received the Ph.D. degree and B.S. degree in computer engineering from Yeungnam University, Korea. He is currently an associate professor in computer engineering department at Kyungil University. He was a software developer at Financial Supervisory Service (FSS) of Korea, a senior researcher at center for innovation of engineering education at Yeungnam University. His research interests include Wireless Sensor Networks, Wireless Body Area Network, Flying Ad-hoc Network, Unmanned Aerial Vehicles, Internet of Things and Research Trend Analysis.

Telephone: +82-53-600-5564

E-mail: ikha@kiu.kr 

News

"Selected as research project of Korea Research Foundation". 2017.05

"An article about our team(Eun-Ji Kim, Dong-Hee Yun, and Da-Som Kim /Chan Kim, Hye-Kyung Lee, Jae-Sung Lee, and Sung-Bae Ko) appeared in the university home. (http://www.kiu.ac.kr/korean/board/focus01.htm)." 2016.06.20 

"We(Ohsung Doh and others) won the Excellence in spring conference of KMMS, Andong, Korea!!!" 2015.5.29

"Our team(Ohsung Doh and others) was chosen to the URP of KFASC!!!" 2015.5.21

KIU Computer Engineering (https://prezi.com/icywcgxdgdbz/present/?auth_key=8l8ge3h&follow=yr4lvx1ibnoh&kw=present-icywcgxdgdbz&rc=ref-126446662)

Education

2001.2~2003.8 Yeungnam University, Ph.D. (Computer Engineering, Software Engineering)

Dissertation: Meta-Validation of UML Diagrams based on Correctness and Consistency Rules, Dept. of Computer Engineering, Yeungnam University, 2003.8

1998.3~2001.2 Yeungnam University, M.Ed. (Computer Education)

Thesis: Design and Implementation of a Web-based Teaching-and-Evaluation System, Major of Computer Education, Yeungnam University, 2001.2

1985.3~1992.2 Yeungnam University, B.S. (Computer Engineering)

Special Research Career

2016.3~2018.2 Researcher of Telecommunication Networks Lab. at Kyungpook National University (Dept. of Electronic Engineering)

Research Theme: Advanced Hierarchical Probabilistic Search Algorithm for Target Detection with Drones, School of Electronics Engineering, Kyungpook National University 

Professional Experience

2015.3 ~ present: Assistant / Associate Professor of Computer Engineering Dept., Kyungil University

2012.1 ~ 2015.2 : Visiting Professor of Computer Engineering Dept., Yeungnam University

2008.9 ~ 2011.12 : Senior Researcher of Innovation Center for Engineering Education, Yeungnam University

2004.4 ~ 2007.8 : Visiting Professor of Computer Engineering Dept., Yeungnam University

2002.3 ~ 2003.3 : Part-time Instructor of Computer Engineering Dept., Yeungnam University

2001.3 ~ 2004.8 : Part-time Instructor of Software Engineering Dept., Kyungwoon Univeristy

1992.1 ~ 1995.10 : Software Developer of Computer Management Center, Financial Supervisory Service of Korea

Research Projects

Basic Science Research Program, National Research Foundation of Korea (2021.03~2025.05)

Research Theme: Development of technology to explore air pollution sources in urban areas through drone collaboration

Researcher (2023~2024) : Beom-Deok Seo

                    (2021~2022) : Ki-Hyun Kim, Jin-Hyung Kim 

Basic Science Research Program, National Research Foundation of Korea (2017.06~2020.05)

Research Theme: Study on Drone-based Optimal Target Detection Technology

Researcher (2017) : Sung-Han Choi, Yeon-Jong Kim, So-Yeon Cho

                     (2018) : Sung-Han Choi, Hae-Won Ryu, Tae-Young Jung, Byung-Yun Son

                     (2019) : Jong-Bin Lim, Sung-Uk Lee, So-Yeon Cho

Undergraduate Student Research Program, Korea Foundation for the Advancement of Science and Creativity (2016.06~2016.12 )

Research Theme: Development of Human Life Disaster Monitoring System in Activities of the Mountain using Unmanned Aerial Vehicle(Drone)

Researcher: Chan Kim, Jae-Sung Lee, Hyui-Kyung Lee, Sung-Base Koh 

Undergraduate Student Research Program, Korea Foundation for the Advancement of Science and Creativity (2015.06~2015.12)

Research Theme: Development of Digital Door Lock System by Internet of Things for Improvement of Security and Usability

Researcher: Oh-Sung Doh, Sang-Min Park, Jun-Hyuk Ryu, Won-Chan Seo

Research Interests

(2021~2025) Unmanned Aerial Vehicles, Drone Applications, Drone Security, Artificial Intelligence Application

(2017~2018) Unmanned Aerial Vehicles, Big Data Processing (Data Filtering, cooperative researcher: Bong-Hyun Back), Drone Applications, Drone Security 

(2014~2017) Wireless Sensor Networks, Wireless Body Area Networks, FANET (*), Big Data Processing, Big Data Processing Framework, Drone Applications 

(2012~2013) Social Network Analysis, Research Trend Analysis, Mobile Learning, Smart Learning

(2002~2013) Unified Modeling Language, Computer Education

Publications (google scholar: https://scholar.google.co.kr/citations?user=ntOU8tcAAAAJ&hl=ko)

International Journal Papers (SCI/SCIE)

I.Ha, "Adaptive Cooperative Search Algorithm for Air Pollution Detection Using Drones ," Sensors, Vol.25, No.10, pp.1-30, May. 2025 (SCIE, ISSN: 1424-8220)

I.Ha, "Improved A-Star Search Algorithm for Probabilistic Air Pollution Detection Using UAVs," Sensors, Vol.24, No.4, pp.1-19, Feb. 2024 (SCIE, ISSN: 1424-8220)

I.Ha, Y.Cho, "Analysis of factors affecting the speed of probabilistic target search using unmanned aerial vehicles," International Journal of Distributed Sensor Networks, Vol.15, no.9, pp.1-12, 2019.9 (SCIE, ISSN: 1550-1477)

I.Ha, Y.Cho, "A Probabilistic Target Search Algorithm Based on Hierarchical Collaboration for Improving Rapidity of Drones," Sensors, Vol.18, no.8, pp.1-18, 2018.8 (SCIE, ISSN: 1424-8220) 

I.Ha, M.Djuraev, and B.Ahn, "An Optimal Data Gathering Method for Mobile Sinks in WSNs," Wireless Personal Communications, Vol.97, Iss.1, pp.1401-1417, 2017.11 (SCIE, ISSN: 0929-6212) 

I.Ha, "Even energy consumption and backside routing: An improved routing protocol for effective data transmission in wireless body area networks ," International Journal of Distributed Sensor Networks, Vol.12(7), pp.1-11, 2016.7 (SCIE, ISSN: 1550-1329)

I.Ha, "Technologies and Research Trends in Wireless Body Area Networks for Healthcare: A Systematic Literature Review," International Journal of Distributed Sensor Networks, Vol.2015, Article ID 573538, 2015.6 (SCIE, ISSN: 1550-1329)

I.Ha, B.Back, and B.Ahn, "MapReduce Functions to Analyze Sentiment Information from Social Big Data," International Journal of Distributed Sensor Networks, Vol.2015, Article ID 417502, 2015.6 (SCIE, ISSN: 1550-1329)

C.Kim, H.Park, J.Kim, and I.Ha, "Analysis of College Classes based on U-CLASS System using Personal Mobile Nodes," International Journal of Distributed Sensor Networks, Vol.2015, Article ID 493407, 2015.5 (SCIE, ISSN: 1550-1329)

I.Ha, M.Djuraev, and B.Ahn, "An Energy-Efficient Data Collection Method for Wireless Multimedia Sensor Networks," International Journal of Distributed Sensor Networks, Vol.2014, Article ID 698452, 2014.9 (SCIE, ISSN: 1550-1329)

I.Ha, and C.Kim, "Understanding User Behaviors in Social Networking Service for Mobile Learning: a Case Study with Twitter," Malaysian Journal of Computer Science, Vol.27, No.2, pp.112-123, 2014.7 (SCIE, ISSN: 0127-9084)

I.Ha, and C.Kim, "The Research Trends and the Effectiveness of Smart Learning,"International Journal of Distributed Sensor Networks Vol.2014, Article ID 537346, 2014.5 (SCIE, ISSN: 1550-1329)

International Journal Papers (Scopus)

T.Jeong and I.Ha, "OpenPose based Smoking Gesture Recognition System using Artificial Neural Network," Tehnicki Glasnik, Vol.17, No.2, pp.251-259, 2023.(Scopus, ISSN: 1846-6168)

B. Back and I.Ha, "Comparison of Sentiment Analysis from Large Twitter Datasets by Naïve Bayes and Natural Language Processing Methods," Journal of information and communication convergence engineering," Vol.17. No.4, pp.239-245, Dec. 2019 (Scopus, ISSN: 2234-8255)

I.Ha, "Analysis of Importance of Search Altitude Control for Rapid Target Detection of Drones," J. lnf. Commun. Converg. Eng. Vol.16, No.2, pp.78-83, 2018.6 (Scopus, ISSN: 2234-8255)

I.Ha, "Use of Drones for Secure Mobile-Commerce: A Secure Commerce Platform Provides Target Information using Drones and CCTV," International Journal of Grid and Distributed Computing, Vol.11, No.5, pp.101-110, 2018.5 (Scopus, ISSN: 2005-4262)

B.Back and I.Ha, "A Platform for Supporting Automatic Data Storing and Visualization of Public and Private Big Data," ACM International Conference Proceeding Series, 2017.10 (Scopus)

I.Ha and You-Ze Cho, "Unmanned Aerial Vehicles-based Health Monitoring System for Prevention of Disaster in Activities of the Mountain," International Journal of Control and Automation, Vol.9, No.9, pp.353-362, 2016.9 (Scopus, ISSN:2005-4297)

I.Ha, "Security and Usability Improvement on a Digital Door Lock System based on Internet of Things," International Journal of Security and Its Applications, Vol.9, No.8, pp.45-54, 2015.9 (Scopus, ISSN:1738-9976)

I.Ha, M.Djuraev, and B.Ahn, "A Power Efficient Transmission Method for Wireless Multimedia Sensor Networks," International Journal of Applied Engineering Research, Vol.9, No.24, pp.24733-24744, 2014.12 (Scopus, ISSN:0973-4562)

I.Ha, J.Jung, and C.Kim, "Influence of Twitter Activity on College Classes," Lecture Notes in Artificial Intelligence 8083 (Subseries of Lecture Notes in Computer Science), pp.612-621, 2013.9 (Scopus, ISSN:0302-9743)

I.Ha, and C.Kim, "Enhancement of Consistency of UML Diagrams by Cross Checking Rules,",Vol.284-287, pp.3409-3412, 2013.1 (Scopus, ISSN:1660-9336)

I.Ha, and C.Kim, "Improving Accuracy of FingerPrint DB with AP Connection States," International Journal of Software Engineering and Its Applications, Vol.6, No.2, pp.143-148, 2012.4 (Scopus, ISSN:1738-9884)

Domestic Journal Papers (KCI)

I.Ha, K. Kim and J. Kim, "Research on appropriate search altitude for drone-based air pollution search," Journal of the Korea Institute of Information and Communication Engineering,  Vol.26, No.2, pp.294-305, Feb. 2022. (KCI, ISSN: 2234-4772)

J.Lim and I.Ha, "Analysis of drone target search performance according to environment change," Journal of Korea Multimedia Society, Vol.22, No.10, in press, 2019.10 (KCI, ISSN: 1229-7771)

I.Ha, "Analysis of the Trend of Unmanned Aerial Vehicles by SLR Method," The Journal of Korean Institute of Communications and Information Sciences, Vol.43, No.07, pp.1-10, 2018.7 (KCI, ISSN: 1226-4717)

I.Ha, "Probability-Based Target Search Method by Collaboration of Drones with Different Altitudes," Journal of the Korea Institute of Information and Communication Engineering, Vol.21, No.12, pp.2371-2379, 2017.12 (KCI, ISSN: 2234-4772)

B.Back and I.Ha, "A Method for Selective Storing and Visualization of Public Big Data Using XML Structure," Journal of the Korea Institute of Information and Communication Engineering, Vol.21, No.12, pp.2305-2311, 2017.12 (KCI, ISSN: 2234-4772)

H.Hwang, K.Kim and I.Ha, "A Digital Door Lock System Using Time- Synchronous One Time Password," Journal of the Korea Institute of Information and Communication Engineering, Vol.21, No.5, pp.386-394, 2017.5 (KCI, ISSN: 2234-4772)

I.Ha, "Analysis of Efficient Health Data Transmission Methods based on the Fusion of WBAN and FANET," Journal of the Korea Institute of Information and Communication Engineering, Vol.21, No.2, pp.386-394, 2017.2 (KCI, ISSN: 2234-4772)   

J.Ahn, I.Ha, "Design and Implementation of File Conversion System for Efficient Upload of Vehicle Operation Data," Journal of the Korea Institute of Information and Communication Engineering, Vol.20, No.3, pp.536-542, 2016.3 (KCI, ISSN: 2234-4772)

I.Ha, "Analysis of Research Trends on Social Network Service: focusing on the Studies of Twitter," Journal of the Korea Contents Association, Vol.14, No.9, pp.567-581, 2014.9 (KCI, ISSN: 1598-4877)

I.Ha, and B.Ahn, "Understanding of Technologies and Research Trends of Wireless Body Area Networks," Journal of the Korea Institute of Information and Communication Engineering, Vol.18, No.8, pp.1961-1971, 2014.8 (KCI, ISSN: 2234-4772)

M.Djuraev, I.Ha, and B.Ahn, "A Mobile Data Gathering Method for Clustered Wireless Sensor Networks," Journal of KIISE: Information Networking, Vol.41, No.3, pp.138-144, 2014.6 (KCI, ISSN: 1229-7720)

B.Back, I.Ha, and B.Ahn, "An Extraction Method of Sentiment Information from Ustructured Big Data on SNS," Journal of Korea Multimedia Society, Vol.17, No.6, pp.671-680, 2014.6 (KCI, ISSN: 1229-7771)

I.Ha, S.Ha, and C.Kim, "Analysis of the Questioning Pattern of Students in Mobile Learning: with focus on Twitter Application," Journal of the Korea Institute of Information and Communication Engineering, Vol.18, No.5, pp.1224-1230, 2014.5 (KCI, ISSN: 2234-4772)

I.Ha, S.Byun, and B.Ahn, "A Study on Packet Transmissions using Overhearing and Time-Interval in WMSNs," Journal of Korea Multimedia Society, Vol.16, No.4, pp.464-471, 2013.4 (KCI, ISSN: 1229-7771)

I.Ha, and D.Song, "A Study on Reasonable Mechanical Engineering Curriculum and Accreditation Criteria," Journal of Engineering Education Research, Vol.15, No.6, pp.19-33, 2012.11 (KCI, ISSN: 1738-6454)

I.Ha, C.Jang, H.Park, and C.Kim, "Analysis of Wi-Fi Signal Characteristics for Indoor Positioning Measurement," Journal of the Korea Institute of Information and Communication Engineering, Vol.16, No.10, pp.2177-2184, 2012.10 (KCI, ISSN: 2234-4772)

I.Ha, "Improvement of Consistency for UML Diagrams with Cross Checking Rules," Journal of the Korea Institute of Information and Communication Engineering, Vol.16, No.6, pp.1291-1299, 2012.6 (KCI, ISSN: 2234-4772)

D.Song, and I.Ha, "Analysis of Mechanical Engineering Curriculum and Model Curriculum Structure," Journal of Engineering Education Research, Vol.14, No.4, pp.48-61, 2011.7 (KCI, ISSN: 1738-6454)

I.Ha, and B.Kang, "Meta-Validation for Consistency between UML Structural Diagram and Behavioral Diagram," Journal of KIISE, Vol.30, No.11.12, 2003.12 (KCI, ISSN: 1229-7720)

I.Ha, and B.Kang, "Metamodels and Verification Rules for Verifying the Correctness of UML Diagrams," Journal of KIPS, Vol.10-D, No.6, 2003.12 (KCI, ISSN: 1226-9190)

I.Ha, and B.Kang, "Design and Implementation of a Web-Based Education-Evaluation System for Setting and Analyzing Questions," Journal of KIPS, Vol.9-D, No.3, 2002.6 (KCI, ISSN: 1226-9190)

International Conference Papers / Internaltional Journal Papers

B.Seo and I.Ha, "3D Cube-Based Highest concentration Air Pollution Tracking Algorithm and Application to a Quadcopter Drone ,"  in Proceedings of ICCSECE24, pp.1-1, Newyork, U.S., Aug.12, 2024

I.Ha, "Improved A-star Algorithm for Drone Target Search,"  in Proceedings of The 19th International Conference on Multimedia Information Technology and Application(MITA 2023), pp.1-4, Ostrava, Czech Republic, July11-14, 2023

I.Ha, "Classification and Analyses of Tendencies of Prior Published Research Studies on Unmanned Aerial Vehicles," in Proceedings of Computing Conference 2018, 10-12 July 2018, London UK.

I.Ha, "Advanced Height Control Strategy for Rapid Target Detection," in Proceedings of The 12th KIPS International Conference on Ubiquitous Information Technologies and Applications, Dec 18-20 2017, Taichung Taiwan.  

B.Back and I.Ha, "A Platform for Supporting Automatic Data Storing and Visualization of Public and Private Big Data," in Proceedings of the ICBDR 2017, October 22 2017, Osaka Japan.

I.Ha and Y.Cho, "A Data Transmission System for Monitoring of Human Life Disaster in Activities of the Mountain using Unmanned Aerial Vehicle (Drone)," Asia-pacific Proceedings of Applied Science and Engineering for Better Human Life, Vol.4, pp.82-86, 2016.8, Jeju Korea.

O.Doh and I.Ha, "A Digital Door Lock System for the Internet of Things with Improved Security and Usability," Advanced Science and Technology Letters, Vol.109, pp.33-38, 2015.8 (International Journal), Jeju Korea.

S.Kim, I.Ha, B.Back, and B.Ahn, "Sentiment Analysis for Mobile SNS Data," Proceedings of The 2014 International Conference on Advances in Big Data Analytics, July 21-24, 2014, Las Vegas Nevada USA.

I.Ha, and B.Kang, "Meta-Validation of UML Structural Diagrams and Behavioral Diagrams with Consistency Rules," Proceeding of PACRIM'03, IEEE region 7, 2003.8.26, Victoria Island Canada. 

I.Ha, and B.Kang, "Meta-Validation of UML Diagrams using OCL Rules," Proceeding of SERP'03, The 2003 International Multiconference, 2003.6.23, Las Vegas USA. 

Domestic Conference Papers

I.Ha, "Improvement of Cube-Based Drone Air Pollution Search Algorithm ,"   in Proceedings of 2025 KMMS spring Conference, Vol.28, No.1, Seoul, 2025.05.08-10 (Best Paper Prize)

B.Seo, I.Ha, "Cooperative Flight Algorithm for Quadrotor Drones in Air Pollution Exploration,"   in Proceedings of 2024 KMMS fall Conference, Vol.27, No.2, Jeju, 2024.11.07-09

Y.Ko, U.Chang and I.Ha, "Design of an Emulator for Functional Safety Testing of Battery Management Systems for Small Batteries,"   in Proceedings of 2024 KMMS fall Conference, Vol.27, No.2, Jeju, 2024.11.07-09

S.Choi, I.Ha, "Performance Comparison of VGGNet, ResNet, and InceptionNet Models for Waste Battery Classification,"   in Proceedings of 2024 KMMS fall Conference, Vol.27, No.2, Jeju, 2024.11.07-09

I.Ha, "Extension of A-star algorithm for drone air pollution detection,"   in Proceedings of 2024 KMMS spring Conference, Vol.27, No.1, Seoul, 2024.05.08-09

B.Seo, I.Ha, "Development of quadcopter for air pollution detection,"   in Proceedings of 2024 KMMS spring Conference, Vol.27, No.1, Seoul, 2024.05.08-09

B.Seo, S.Kim, S.Moon and I.Ha, "Development of AI-based VTOL drone for police vehicle tracking ,"   in Proceedings of 2023 KMMS fall Conference, Vol.26, No.2, Daegu, 2023.11.17-18

I.Ha, "Adaptive A* Search Algorithm for Drone-based Air Pollution Source Search,"  in Proceedings of 2023 KMMS spring Conference, Vol.26, No.1, Sunchun, 2023.05.19

B.Seo and I.Ha, "Research on the control of autonomous flying drones for air pollution detection,"   in Proceedings of 2023 KMMS spring Conference, Vol.26, No.1, Sunchun, 2023.05.19

K.Kim, J. Kim and I.Ha, "Optimal Altitude Experiment for Drone-based Air Pollution Search," in Proceedings of 2021 KMMS fall Conference, Seoul, 2021.11.26

J.Lim and I.Ha, "Target search performance test according to the change of flight environment of drones," in Proceedings of 2019 KMMS Spring Conference, POSTECH, 2019.5.17  (Best Paper Prize)

B.Son,T.Jung and I.Ha, "Performance Comparison of Communication Module according to Drone Target Search Environment," in Proceedings of 2019 KMMS Spring Conference, POSTECH, 2019.5.17

B.Son,T.Jung,Y.Chung and I.Ha, "Analysis and Performance Comparison of Wireless Communication Modules for Arduino," in Proceedings of 2018 UCWIT Conference, 2018.12.7

H.Ryu, S.Choi and I.Ha, "Security Treats and Countermeasures in Drone Operation," in Proceedings of 2019 KIPS Fall Conference, Busan, 2018.11.2

B.Back and I.Ha, "An Effective Method for Filtering SNS Garbage Data by Machine Learning," in Proceedings of 2018 KMMS Spring Conference, Seoul, 2018.5.18

I.Ha, "Classification and review of domestic research related to UAV," in Proceedings of 2018 KMMS Spring Conference, Seoul, 2018.5.18 

I.Ha, G.Kim, S.Rahman, I.Mahmud, T.Lubna and Y.Cho, "A probabilistic search algorithm by hierarchical collaboration of drones," in Proceedings of KIPS Fall Conference, Daegu, 2017.11.11

I.Ha, "An Improvement of the Search Algorithm for Drone’s Target Quick Searching," in Proceedings of 2017 KMMS Spring Conference, Daejeon, 2017.5.26

Hyoung-Jin Hwang and and Il-Kyu Ha, "Encryption Scheme of Digital Door Lock Using the One Time Password of Time-Sysnchronous," Proceedings of KMMS Fall Conference, Busan, 2016.10.21

Dong-Hee Yun, En-Ji Kim, and Il-Kyu Ha, "An Equipment for Complete Data Deletion in Android Devices," Proceedings of KMMS Spring Conference, Seoul, 2016.5.27 

Dohwan Choi, Sangjin Jung, Doyoung Kim and Il-Kyu Ha, "Smart Mirror for Home Use Based on Voice Recognition," Proceedings of KMMS Spring Conference, Seoul, 2016.5.27 

Eun-Ji Kim, Dong-Hee Yun and Il-Kyu Ha, "Design and Implementation of A Data Recovery Device for Smartphones," Proceedings of KMMS Spring Conference, Seoul, 2016.5.27 (Best Paper Prize) 

DaeYong Kim, Chan Kim, Chul-Jin Kim, Si-Nam Kim, Jae-Han Jung, In-Ho Jung, and Il-Kyu Ha, "Smart Home System that Provides Autonomously A Tailored Environment for User’s States," Proceedings of KMMS Spring Conference, Seoul, 2016.5.27 

Ji-Soo Un, Hae-Gyeong Lee, Young-Eun Choi, Youn-gi Jung, and Il-Kyu Ha, "A Health Monitoring System for the Elderly People who Lives Alone," Proceedings of KMMS Spring Conference, Seoul, 2016.5.27 

O.Doh and I.Ha, "A Method to Enhance Security of Digital Door Lock using Multi Keys," Proceedings of KMMS Fall Conference, Daegu, 2015.11.6 

O.Doh, S.Ha, and I.Ha, "Design of A Digital Door Lock by IoT," Proceedings of KMMS Spring Conference, Andong, 2015.5.29 (Best Paper Prize)

J.Ahn and I.Ha, "Design of An Automatic File Converter for Efficient Upload of Vehicle Data," Proceedings of KMMS Spring Conference, Andong, 2015.5.29

S.Hyun, K.Moh, W.Nam, J.Kim and I.Ha, "Design of a Mobile Office System for Part-time Job Management," Proceedings of KMMS Spring Conference, Andong, 2015.5.29

I.Ha, and B.Kang, "A USE command Generator for the efficiency of model verifications," Proceedings of KIPS Spring Conference, 2005.5.14

I.Ha, and B.Kang, "A Study on Technique on verifying the consistency and correctness of Class Diagram with OCL," Proceedings of KIPS Fall Conference, 2002.11.15

I.Ha, and B.Kang, "UML Meta Model with component and relation for verifying the consistency and correctness," Proceedings of KIPS Spring Conference, 2002.4.12

I.Ha, and B.Kang, "Design and Implementation education scoring system on web," Proceedings of KIISE Spring Conference, 2001.4.26