September 2024 OES Beacon

Who’s who in the IEEE OES

Son-Cheol YU, IEEE OES Korea Chapter Chair, Professor of Pohang University of Science and Technology (POSTECH)

I started my academic career at Prof. Ura’s laboratory at the University of Tokyo and received a Ph.D. in 2003 with an AUV major. In 2008, I joined the Department of Mechanical Engineering at the Pusan National University as an assistant professor. Since 2010, I have been a professor at the Pohang University of Science and Technology (POSTECH). Pohang City is famous for the local landmark ‘Big Hand’ as shown in Fig. 1.

In 2017, I spent a sabbatical year at Prof. Hanumant Singh’s Laboratory at WHOI. He introduced me to an artic AUV at that time, and it was a strong motivation to develop various field robots.  I learned many things from Dr. Kenneth G. Foote in image sonars. I also had a good time with Dr. Dana Yoerger and Dr. Yogesh Girdhar in Cape Cod.

In 1998, I attended the first IEEE OES International Symposium on Underwater Technology (UT) conference in Tokyo.  It was my first international conference, and it was a strong motivation to host UT in my country.  Hosting UT 2017 in Busan was a memorable and challenging experience.  The OES Korea Chapter, established in 2014, had never hosted an OES conference.  Despite the hurdles, with the strong support of the OES Korea Chapter, Prof. Tamaki Ura, and the OES Japan Chapter, we successfully hosted the event, as shown in Figures 2 and 3, creating many good memories along the way.

In 2024, I attended the Open House, a public event held annually by the Institute of Industrial Science (IIS) at the University of Tokyo.  I was a presenter during my graduate studies in the Open House. But I attended as a visitor this time, which was a very touching moment, and I enjoyed the event. One of the impressive events at the IIS Open House was the Hoshizora Touronkai (Starry Sky Discussion), which was centered around the OES Japan Chapter, where I was delighted to meet Prof. Maki Toshihiro, Ms. Sugimatsu Harumi, and old friends as shown in Fig. 4. Hoshizora Touronkai is a networking event of the OES Japan chapter and related attendees. Most of all, I love the name of the event.

OES technology often significantly contributes to solving issues in public society.  Since 2011, I have been charged as the director of the POSTECH Gyeonbuk Sea Grant Center, which is almost the same as the US Sea Grant Program. The motto of this Center is “Not Solution, But Tools!”.  The Center mainly aims to develop tools to solve a local marine community’s issues. For example, one of the large local fishery areas is a deep-sea crab, and the fishermen need to improve the fishing trap and change the fishing spot to preserve the environment. As shown in Fig. 5, the Center had developed a 2000m depth rating stand-alone all-in-one type time-lapse video camera with lights. It had been recorded for several months with 1 minute wake up every hour.  The Center just sent the camera system, and the local fishermen solved the problems and found various applications utilizing the camera. The camera system is based on an AUV’s camera system. The Center has successfully delivered many tools, such as a safety watch and gear, to support traditional Korean fishery ladies’ underwater safety during their dives and smart aquaculture systems. Most of them are based on underwater robots and sensing technology.  Public service for the community hardly contributes to academic credit or research funding, but it is worthwhile for all.

In 2012, my laboratory’s first AUV Cyclops was developed, as shown in Fig. 6, from scratch.  Building a new AUV is hard work. However, building essential infrastructures for AUVs, such as an indoor water tank or a machine shop on campus, is a harder and more challenging task.  At that time, I understood the difficulties of the founder of a laboratory. Underwater technology has contributed greatly to ocean engineering and marine science, resulting in many applications. Based on this potential, I have been working to broaden the spectrum of my research. Ocean-focused underwater robots and sensing technology have been extended to extreme environmental robots and sensing-related technology. With the support of ONR Global, the wave glider mechanism-based robotic buoy system capable of wave energy harvesting has been developed. Various sensors and robots, such as an underwater biomimetic robot, as shown in Fig. 7, and the underwater real-time microscope, have been developed. My lab was also named the Hazardous Extreme Environmental Robotics (HERO) Lab. Thanks to these efforts, a new research center was established in June 2024: the POSTECH-Korea Hydro and Nuclear Power (KHNP) Robot Research Center. This Center focuses on developing robots for power plants, especially underwater applications. We plan to develop underwater robots for the safety inspection and maintenance of nuclear reactor cooling tanks and power plant water supply pipes. These research efforts are based on marine robotics and sensing technology.  I believe that technology based on OES will continue to produce many promising applications in the future.

Finally, I appreciate my lovely family. My wife has been a companion on the journey of my work and life. My two daughters have been a source of joy and good memories.