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KAIST and Seoul National University Students Hold 100-Hour Robot Hackathon to Nurture Physical AI Talent
KAIST (President Choongsik Bae) announced on August 4 that RoboticUS, a joint student organization formed by students from KAIST and Seoul National University, is holding the inaugural Robot Hackathon at KAIST from August 3 to 8.
"In the era of Physical AI, we need convergence talent who can go beyond building good AI to design and implement robots and systems that move the real world based on AI," said Choongsik Bae, President of KAIST. "This hackathon, planned and run entirely by students, is a good example of KAIST's culture of challenge and collaboration, and we expect it to become a new educational model for turning future technologies into reality," he added.
The hackathon puts this educational philosophy directly into students' hands. It is Korea's first student-led Physical AI robot hackathon, planned and run by students from KAIST and Seoul National University across institutional boundaries. Participants experience the entire process of designing and building working robots, developing hands-on capabilities that integrate AI and hardware.
The event is hosted by RoboticUS, a nonprofit student organization formed jointly by MR, a robotics club in KAIST's Department of Mechanical Engineering, and Seoul National University's robotics clubs SHAPE and SIGMA. Students who share a passion for robotics from the two universities joined forces across institutional lines, handling every stage themselves — from recruiting participants to designing the mission, running the event, and setting up the presentation and judging format. KAIST's Department of Mechanical Engineering supports the event with facilities and operational assistance so that the students' initiative can translate into genuine educational value.
Ten teams — 30 students total — selected from the two universities will take part. After receiving training in power circuits and robot joint control on August 3 and 4, participants will begin building their robots when the mission is unveiled on the morning of August 5 and continue working until 4 p.m. on August 8. Starting from an idea, they will go through design, assembly, programming, and repeated testing to complete a working robot — experiencing the full roughly 100-hour cycle themselves.
Each team will be provided with Angel Robotics' "phact" actuator, which serves as the robot's joints and muscles, and NVIDIA's Jetson AGX, which functions as the robot's brain. Taejin Technology Co., Ltd will provide training on circuits and electronic components for supplying stable power to the robots, and Angel Robotics will support hands-on training in using the actuators and controlling the robots.
Participants will not simply assemble a finished kit — they will design the robot's shape and movement from the ground up and build it themselves.
For fairness, the mission will be revealed only at the start of the hackathon on August 5. There is no single correct answer or predetermined robot form. Each team will interpret the same mission differently, combining mechanical structure, circuitry, AI, and control software into a single robot. One of the highlights will be seeing the different solutions the ten teams develop in response to the same mission.
The final day, August 8, will be an open Physical AI festival that welcomes the general public. A public conference at the KI Building (E4) Fusion Hall will introduce the current state of Physical AI in an accessible and engaging way — from robotic skin that lets robots feel touch like humans, to humanoid robots that can see and hear people, to a quadrupedal robot that has completed a marathon.
Professors Jung Kim, Yong-Hwa Park, and Jemin Hwangbo of the Department of Mechanical Engineering, along with Joon-Ha Kim, CEO of Diden Robotics, will each give a talk on robotic skin and haptics, multimodal perception in humanoid robots, the quadrupedal robot Raibo, and the journey of developing Physical AI for industrial use, respectively.
After the conference, an open demo day for the ten participating teams will run from 4 to 5 p.m. at KAIST's Culture Complex (E9), 3rd floor. Members of the public will be able to visit each team's booth, watch the robots the students built over 100 hours in action, and submit their own evaluations via QR code.
Judging criteria include mission achievement, technical execution, creativity, and presentation and demonstration. The final score will weight faculty advisor evaluation at 30%, peer evaluation among hackathon participants at 30%, sponsor judging panel evaluation at 30%, and pre-registered public attendee evaluation at 10%.
Angel Robotics and Taejin Technology are taking part as core technology partners, providing equipment and training. Faculty members and industry experts are providing education and technical guidance so that students can safely handle equipment used in real research and industrial settings.
"Physical AI's competitiveness comes not just from software but from hardware and control technology," said Kyoungchul Kong, Professor from Mechanical Engineering at KAIST and Head of the Future Technology Institute at Angel Robotics. "This hackathon will show that with high-performance robot components and the right development environment in place, even undergraduates can turn their imagination into a working robot in 100 hours," he added.
"This hackathon is about learning and building together, rather than competing between schools," said Yeonsu An, President of RoboticUS (and President of MR, KAIST's robotics club). "We hope the general public will get to experience the robots students have built firsthand and take part in the judging, coming away with the sense that Physical AI is a technology anyone can understand and enjoy — not just something for experts," she added.
“Although we do not yet know what the challenge will be, I am most looking forward to gathering in one place and developing robots together,” said Hyeontae Jeon, a participating student from Seoul National University. “It will be even more meaningful to work through challenges across university boundaries and present the robots we built ourselves to the public.”
The public conference is open to anyone through pre-registration. Pre-registered attendees can watch the lectures, view the open demo day, and take part in on-site judging. Registration is available on the RoboticUS official website or on Event-us, under "First Robot Hackathon – Robot & AI Public Conference (KAIST × SNU)." Registration closes August 6.
2026.08.04 View 4832 -
Seeking Innovative Financial Solutions to Help Deep Tech Startups Overcome the Valley of Death
KAIST announced on June 16 that it will co-host 'STARTUP NATION KOREA 2026' (2026 Innovation Entrepreneurship Nation Korea International Forum) with Seoul National University and The JoongAng from June 17 to 18 at the Haedong Advanced Engineering Building on Seoul National University's Gwanak Campus.
Celebrating its 5th anniversary this year, the forum serves as a platform to overcome the so-called 'R&D Paradox'—where outstanding research and development achievements fail to fully connect with entrepreneurship and industry—and to seek solutions for realizing a science and technology-based innovation entrepreneurship nation. Universities, government agencies, research institutions, investment firms, conglomerates, startups, and media will participate to discuss cooperative methods for connecting technological potential to market and industrial value.
In particular, this year's forum focuses on the role of patient capital and innovative finance, which are critical challenges for the growth of deep tech startups, under the theme “Deep Tech: Beyond the Valley of Death.”
Deep tech startups require long-term investment and large-scale funding throughout the entire process from research and development to technology verification, demonstration, and market entry. However, the domestic venture investment market is relatively focused on short-term returns, often causing these startups to face severe difficulties during the commercialization phase. Therefore, this forum will intensively discuss strategies to establish an innovative financial ecosystem where 'patient capital'—which invests based on the long-term growth potential of technology—is organically linked with investments, guarantees, and policy finance required for the entire life cycle of technology commercialization.
Kwang Hyung Lee, President of KAIST, said, “Although Korea possesses world-class R&D capabilities, major barriers still exist in the process of translating research achievements into startups and new industries. I hope this forum serves as a collective effort to seek solutions through patient capital, innovative finance, and a sustainable entrepreneurial ecosystem so that deep tech startups can overcome the valley of death and grow into the global market.”
Hyun Min Bae, Director of the KAIST Startup Institute, stated, “The success of deep tech entrepreneurship cannot be achieved through technology alone. Through this forum, we look forward to discussing the growth ladders and collaborative measures that connect laboratory technologies to markets, investments, and global expansion, thereby discovering a new direction for Korea's deep tech startup ecosystem.”
On the first day of the forum, Professor Jeong Dong Lee of the College of Engineering at Seoul National University, author of The Way of Accumulation and The First Question, will deliver a keynote speech emphasizing the role of finance in accelerating technological innovation and the importance of patient capital. This will be followed by a roundtable featuring domestic and international experts to discuss long-term investment case studies and policy directions for innovative finance.
In addition, the presentation ceremony for the '2026 Korea Innovation Entrepreneurship Awards' will be held simultaneously. This year, a total of 13 awards will be presented across three categories: the Innovation Entrepreneurship Award, the Innovation Entrepreneurship Challenge Award, and the Innovation Entrepreneurship Ecosystem Contribution Award.
The recipients of the Innovation Entrepreneurship Award include Sovagen, EndoRobotics, WIRobotics, Exo Systems, Marine Drone Tech, Daughter, MUSTBIO, IMNEWRUN, and Narnia Labs. These companies are promising deep tech enterprises recognized for their technological innovation and growth potential in national strategic sectors such as AI, robotics, bio/healthcare, drones, and mobility.
The Innovation Entrepreneurship Challenge Award will be presented to Scionic AI, RX, and TDS Innovation, while the Innovation Entrepreneurship Ecosystem Contribution Award will be awarded to the Commercialization Promotion Agency for R&D Outcomes (COMPA).
Kyeong Hwan Kim, Chair of the Evaluation Committee (Dean of the Graduate School of Global Entrepreneurship at Sungkyunkwan University), remarked, “Promising deep tech companies that will lead future industries in fields like AI, robotics, semiconductors, and bio have stood out remarkably. This contest was a meaningful opportunity to confirm the robust growth potential of Korea's innovation entrepreneurship ecosystem.”
An exhibition featuring innovative startups and various programs linked with government ministries will also run throughout the event. Participating companies will showcase their breakthrough technologies in sectors including AI, robotics, bio/healthcare, advanced materials, energy, and mobility, while exploring collaboration opportunities with investment institutions and industry leaders. Notably, WIRobotics plans to exhibit its humanoid robot 'ALLEX', which was previously unveiled at CES 2026.
The forum is co-hosted by KAIST, Seoul National University, and The JoongAng, and sponsored by major agencies including the Ministry of Science and ICT, the Ministry of Trade, Industry and Energy, and the Ministry of SMEs and Startups. The event will be broadcast live via the official YouTube channel and website of STARTUP NATION KOREA 2026.
2026.06.16 View 6349 -
Startup Nation Korea International Forum to be Held at KAIST
On September 9, KAIST announced that it will be co-hosting the 4th "2025 Startup Nation Korea International Forum" with JoongAng Ilbo and Seoul National University. The two-day event will be held from September 10 to 11 at the KI Building on the main KAIST campus in Daejeon. The forum aims to bring together various members of the startup ecosystem—including government officials, universities, research institutions, investors, entrepreneurs, media, and students—to find practical solutions to the "R&D paradox," where research and development achievements in the Korean science and technology sector don't lead to successful startups. First held at Seoul National University in 2022, this year's forum will take place at KAIST.
<KI Building, where the Startup Nation International Forum will be held>
This year's theme is "The Path to an Innovative Startup Cluster." The goal is to properly foster a startup cluster in Korea through industry-academia-research cooperation, which can serve as a new growth engine, similar to global innovation clusters like Boston in the United States, a hub for the biotech industry, and Zhongguancun, China's top innovation hub.
Day 1: Startup Nation Korea International Forum
On the morning of the first day, a pre-event will feature presentations on the future of innovation clusters centered in Hongneung, Seoul, and Daedeok, Daejeon, by Professor Lee Ji-hoon of Kangwon National University, Director Im Moon-taek, Chairman Park Han-oh of Bioneer, and Director Kim Hyun-woo of the Seoul Bio Hub Project. Separately from the main event, a "Corporate-Early Career Researcher Networking Day," hosted by the Ministry of Trade, Industry and Energy, is also scheduled.
The opening ceremony on the first day will begin with opening remarks by Hong Seok-hyun, Chairman of JoongAng Holdings, welcome addresses by KAIST President Lee Kwang-hyung and Seoul National University President Yoo Hong-lim, a congratulatory speech from President Lee Jae-myung (read on his behalf by Ha Jung-woo, Chief of AI Future Planning), and congratulatory remarks from the Ministry of Science and ICT, the Ministry of Trade, Industry and Energy, the Ministry of SMEs and Startups, the Korea Chamber of Commerce and Industry, and the Federation of Korean Industries.
Following the opening ceremony, keynote speeches will be delivered by Oh Sang-rok, President of the Korea Institute of Science and Technology (KIST); Johannes Fruehauf, President of LabCentral; and Liu De-ying, President of the Peking University Innovation and Entrepreneurship College. A panel discussion on fostering startups with a focus on clusters will also be held. The discussion will be moderated by Hyun-min Bae, Director of the KAIST Center for Entrepreneurship, and will include panelists such as Johannes Fruehauf, Liu De-ying, Moon-taek Im, Director of the Daedeok Innopolis Cluster Headquarters, Jong-tak Han, Director of the Daejeon City Corporate Support Policy Division, and Hyun-woo Kim, Director of the Seoul Bio Hub Project.
Innovation Startup Competition Awards Ceremony
The Innovation Startup Competition awards ceremony will be held on the afternoon of the first day. This year, the number of awards has been significantly expanded to 13 across three categories: the Grand Prize (9 awards), the Innovation Startup Challenge Award (3 awards), and the Innovation Startup Ecosystem Contribution Award (1 award).
Nine startups were selected for the Grand Prize: Rebellion (Minister of Science and ICT Award), Cureverse (Minister of Trade, Industry and Energy Award), Cryptolab (Minister of SMEs and Startups Award), SEMIFIVE (Chairman of the Korea Chamber of Commerce and Industry Award), Solivis (Chairman of the Federation of Korean Industries Award), Medical IP (KAIST President's Award), Selectstar (Seoul National University President's Award), Bluetile Labs (Chairman of the National Research Council of Science & Technology Award), and Naeil Technology (Chairman of the Innopolis Foundation Award).
Three startups were selected for the newly established Innovation Startup Challenge Award (for startups less than 3 years old): Panacia (Minister of Science and ICT Award), HyperAccel (Minister of Trade, Industry and Energy Award), and WatertreeNeZ (Minister of SMEs and Startups Award). Additionally, Korea Technology Finance Corporation was chosen for the first-ever Innovation Startup Ecosystem Contribution Award (Chairman of JoongAng Holdings Award).
Kim Kyung-hwan, Dean of the Sungkyunkwan University Graduate School of Global Entrepreneurship and head of the judging committee, said, "This year's competition featured a large number of deep-tech startups at a global level in AI, biotech, and semiconductors. A notable feature was the high number of companies with intellectual property rights, such as patents."
<Startup Nation Korea International Forum Poster>
Day 2: Startup Nation Korea International Forum
On the second day (September 11), Part 1 will feature IR pitching from eight startups recommended by KAIST, Seoul National University, and the Korea Technology Finance Corporation. A subsequent discussion on revitalizing the innovation startup ecosystem will be moderated by Professor Ahn Tae-wook of the KAIST Center for Entrepreneurship. The discussion will include experts from industry, academia, research, and investment, such as Park Dae-hee, Chairman of the Creative Economy Innovation Center Council; Cho Young-soo, Director of Planning and Coordination at the Korea Institute of Startup & Entrepreneurship Development; startup CEOs Kyu-nam Kim, Ji-min Park, and Kyung-jin Jung; and Ji-young Jang, CEO of Rising S Ventures. They will engage in an in-depth discussion on the current status and future direction of the startup ecosystem.
In the afternoon, a special session will be dedicated to showcasing cases of student startups from KAIST. CLASSUM, Smoore Talk, Innersia, and OINS will present their entrepreneurial journeys and achievements. These presentations are expected to highlight the competitiveness of university-based startup ecosystems.
Additionally, the "PEN Global Investment Forum (Investor's Reverse Pitch)" will be held with the participation of global investors. Venture capital experts from the United States, China, Hong Kong, and other regions will take the stage to share their investment strategies and outlook on the global market.
Following this, at the Innopolis Campus Lab Startup Seminar hosted by the KAIST Center for Entrepreneurship, Myung-soo Song, CEO of PEN Ventures, will give a presentation on overseas expansion for deep-tech companies through collaboration with global Corporate Venture Capital (CVCs), providing practical insights for startups looking to expand internationally. A networking session will also be held for participants to discover new collaboration opportunities. On the same morning, the Innopolis Foundation will hold a concurrent seminar to celebrate its 20th anniversary, focusing on "The Dissemination of AI and Deep-Tech Achievements."
Seok-hyun Hong, Chairman of JoongAng Holdings, said, "For Korea to leap forward as a startup nation, universities, research institutions, and industry must join forces. I hope this forum will serve as a starting point for presenting a vision for the Korean startup ecosystem and creating a startup cluster model that can compete on the world stage."
Hong-lim Yoo, President of Seoul National University, stated, "Seoul National University has been striving to connect research achievements to social value. I hope that through this forum with KAIST, we can create a cooperative model necessary for Korea to move toward becoming a global innovation startup nation."
Kwang-hyung Lee, President of KAIST, said, "KAIST is taking the lead in creating a Korean-style innovation model by connecting research and development achievements to actual startups and industries. I hope this international forum will be an opportunity to establish a Korean-style startup cluster model and strengthen our global competitiveness."
Innovation Startup Exhibition
An exhibition of innovative startups will also be held on the first floor of the KAIST building where the international forum is taking place. In addition to booths for the 13 startups selected in the Innovation Startup Competition, visitors can also meet 23 other innovative startups chosen by participating institutions like Seoul National University and KAIST.
The forum is sponsored by the Ministry of Science and ICT, the Ministry of Trade, Industry and Energy, the Ministry of SMEs and Startups, the Korea Chamber of Commerce and Industry, the Federation of Korean Industries, the National Research Council of Science & Technology, the Innopolis Foundation, the Korea Technology Finance Corporation, Chungcheongbuk-do Provincial Government, PEN Ventures, Korea Technology Finance Corporation, and DaedeokNet. The forum will be live-streamed on YouTube and the official websites (www.snkforum.co.kr, www.joongang.co.kr), where anyone can watch.
2025.09.09 View 9868 -
KAIST Research Team Develops Electronic Ink for Room-Temperature Printing of High-Resolution, Variable-Stiffness Electronics
A team of researchers from KAIST and Seoul National University has developed a groundbreaking electronic ink that enables room-temperature printing of variable-stiffness circuits capable of switching between rigid and soft modes. This advancement marks a significant leap toward next-generation wearable, implantable, and robotic devices.
< Photo 1. (From left) Professor Jae-Woong Jeong and PhD candidate Simok Lee of the School of Electrical Engineering, (in separate bubbles, from left) Professor Gun-Hee Lee of Pusan National University, Professor Seongjun Park of Seoul National University, Professor Steve Park of the Department of Materials Science and Engineering>
Variable-stiffness electronics are at the forefront of adaptive technology, offering the ability for a single device to transition between rigid and soft modes depending on its use case. Gallium, a metal known for its high rigidity contrast between solid and liquid states, is a promising candidate for such applications. However, its use has been hindered by challenges including high surface tension, low viscosity, and undesirable phase transitions during manufacturing.
On June 4th, a research team led by Professor Jae-Woong Jeong from the School of Electrical Engineering at KAIST, Professor Seongjun Park from the Digital Healthcare Major at Seoul National University, and Professor Steve Park from the Department of Materials Science and Engineering at KAIST introduced a novel liquid metal electronic ink. This ink allows for micro-scale circuit printing – thinner than a human hair – at room temperature, with the ability to reversibly switch between rigid and soft modes depending on temperature.
The new ink combines printable viscosity with excellent electrical conductivity, enabling the creation of complex, high-resolution multilayer circuits comparable to commercial printed circuit boards (PCBs). These circuits can dynamically change stiffness in response to temperature, presenting new opportunities for multifunctional electronics, medical technologies, and robotics.
Conventional electronics typically have fixed form factors – either rigid for durability or soft for wearability. Rigid devices like smartphones and laptops offer robust performance but are uncomfortable when worn, while soft electronics are more comfortable but lack precise handling. As demand grows for devices that can adapt their stiffness to context, variable-stiffness electronics are becoming increasingly important.
< Figure 1. Fabrication process of stable, high-viscosity electronic ink by dispersing micro-sized gallium particles in a polymer matrix (left). High-resolution large-area circuit printing process through pH-controlled chemical sintering (right). >
To address this challenge, the researchers focused on gallium, which melts just below body temperature. Solid gallium is quite stiff, while its liquid form is fluid and soft. Despite its potential, gallium’s use in electronic printing has been limited by its high surface tension and instability when melted.
To overcome these issues, the team developed a pH-controlled liquid metal ink printing process. By dispersing micro-sized gallium particles into a hydrophilic polyurethane matrix using a neutral solvent (dimethyl sulfoxide, or DMSO), they created a stable, high-viscosity ink suitable for precision printing. During post-print heating, the DMSO decomposes to form an acidic environment, which removes the oxide layer on the gallium particles. This triggers the particles to coalesce into electrically conductive networks with tunable mechanical properties.
The resulting printed circuits exhibit fine feature sizes (~50 μm), high conductivity (2.27 × 10⁶ S/m), and a stiffness modulation ratio of up to 1,465 – allowing the material to shift from plastic-like rigidity to rubber-like softness. Furthermore, the ink is compatible with conventional printing techniques such as screen printing and dip coating, supporting large-area and 3D device fabrication.
< Figure 2. Key features of the electronic ink. (i) High-resolution printing and multilayer integration capability. (ii) Batch fabrication capability through large-area screen printing. (iii) Complex three-dimensional structure printing capability through dip coating. (iv) Excellent electrical conductivity and stiffness control capability.>
The team demonstrated this technology by developing a multi-functional device that operates as a rigid portable electronic under normal conditions but transforms into a soft wearable healthcare device when attached to the body. They also created a neural probe that remains stiff during surgical insertion for accurate positioning but softens once inside brain tissue to reduce inflammation – highlighting its potential for biomedical implants.
< Figure 3. Variable stiffness wearable electronics with high-resolution circuits and multilayer structure comparable to commercial printed circuit boards (PCBs). Functions as a rigid portable electronic device at room temperature, then transforms into a wearable healthcare device by softening at body temperature upon skin contact.>
“The core achievement of this research lies in overcoming the longstanding challenges of liquid metal printing through our innovative technology,” said Professor Jeong. “By controlling the ink’s acidity, we were able to electrically and mechanically connect printed gallium particles, enabling the room-temperature fabrication of high-resolution, large-area circuits with tunable stiffness. This opens up new possibilities for future personal electronics, medical devices, and robotics.”
< Figure 4. Body-temperature softening neural probe implemented by coating electronic ink on an optical waveguide structure. (Left) Remains rigid during surgery for precise manipulation and brain insertion, then softens after implantation to minimize mechanical stress on the brain and greatly enhance biocompatibility. (Right) >
This research was published in Science Advances under the title, “Phase-Change Metal Ink with pH-Controlled Chemical Sintering for Versatile and Scalable Fabrication of Variable Stiffness Electronics.” The work was supported by the National Research Foundation of Korea, the Boston-Korea Project, and the BK21 FOUR Program.
2025.06.04 View 17039 -
Professor Won-Ki Cho Selected as the 2020 SUHF Young Investigator
Professor Won-Ki Cho from the Department of Biological Sciences was named one of three recipients of the 2020 Suh Kyung-Bae Science Foundation (SUHF) Young Investigator Award.
The SUHF is a non-profit organization established in 2016 and funded by a personal donation of 300 billion KRW in shares from Chairman and CEO Kyung-Bae Suh of the Amorepacific Group. The primary purpose of the foundation is to serve as a platform to nurture and provide comprehensive long-term support for creative and passionate young Korean scientists committed to pursuing research in the field of life sciences. The SUHF selects three to five scientists through an open recruiting process every year and grants each scientist a maximum of 2.5 billion KRW over a period of up to five years.
Since January this year, the foundation received 67 research proposals from scientists across the nation, especially from those who had less than five years of experience as professors, and selected the three recipients.
Professor Cho proposed research on how to observe the interactions between nuclear structures and constantly-changing chromatin monomers in four dimensions through ultra-high-resolution imaging of single living cells. This proposal was recognized as one that could help us better understand the process of transcription regulation, which remains a long-standing question in biology.
The other awards were given to Professor Soung-hun Roh of Seoul National University and Professor Joo-Hyeon Lee of the University of Cambridge.
With these three new awardees, a total of 17 scientists have been named SUHF Young Investigators to date, and the funding to support these scientists now totals 42.5 billion KRW.
Professor Inkyung Jung and Professor Ki-Jun Yoon from the Department of Biological Sciences, and Professor Young Seok Ju and Professor Jeong Ho Lee from the Graduate School of Medical Science and Engineering are the four previous winners from KAIST in the years 2017 through 2019.
(END)
2020.10.15 View 25438 -
Breastfeeding Helps Prevent Mothers from Developing Diabetes after Childbirth
A team of South Korean researchers found that lactation can lower the incidence and reduce the risk of maternal postpartum diabetes. The researchers identified that lactation increases the mass and function of pancreatic beta cells through serotonin production. The team suggested that sustained improvements in pancreatic beta cells, which can last for years even after the cessation of lactation, improve mothers’ metabolic health in addition to providing health benefits for infants.
Pregnancy imposes a substantial metabolic burden on women through weight gain and increased insulin resistance. Various other factors, including a history of gestational diabetes, maternal age, and obesity, further affect women’s risk of progressing to diabetes after delivery, and the risk of postpartum diabetes increases more in women who have had gestational diabetes and/or repeated deliveries.
Diabetes-related complications include damage to blood vessels, which can lead to cardiovascular and cerebrovascular diseases such as heart attack and stroke, and problems with the nerves, eyes, kidneys, and many more. Since diabetes can pose a serious threat to mothers’ metabolic health, the management of maternal metabolic risk factors is important, especially in the peripartum period. Previous epidemiological studies have reported that lactation reduces the risk of postpartum diabetes, but the mechanisms underlying this benefit have remained elusive.
The study, published in Science Translational Medicine on April 29, explains the biology underpinning this observation on the beneficial effects of lactation. Professor Hail Kim from the Graduate School of Medical Science and Engineering at KAIST led and jointly conducted the study in conjunction with researchers from the Seoul National University Bundang Hospital (SNUBH) and Chungnam National University (CNU) in Korea, and the University of California, San Francisco (UCSF) in the US.
In their study, the team observed that the milk-secreting hormone ‘prolactin’ in lactating mothers not only promotes milk production, but also plays a major role in stimulating insulin-secreting pancreatic beta cells that regulate blood glucose in the body.
The researchers also found that ‘serotonin’, known as a chemical that contributes to wellbeing and happiness, is produced in pancreatic beta cells during lactation. Serotonin in pancreatic beta cells act as an antioxidant and reduce oxidative stress, making mothers’ beta cells healthier. Serotonin also induces the proliferation of beta cells, thereby increasing the beta cell mass and helping maintain proper glucose levels.
The research team conducted follow-up examinations on a total of 174 postpartum women, 85 lactated and 99 non-lactated, at two months postpartum and annually thereafter for at least three years. The results demonstrated that mothers who had undergone lactation improved pancreatic beta cell mass and function, and showed improved glucose homeostasis with approximately 20mg/dL lower glucose levels, thereby reducing the risk of postpartum diabetes in women. Surprisingly, this beneficial effect was maintained after the cessation of lactation, for more than three years after delivery.
Professor Kim said, “We are happy to prove that lactation benefits female metabolic health by improving beta cell mass and function as well as glycemic control.”
“Our future studies on the modulation of the molecular serotonergic pathway in accordance with the management of maternal metabolic risk factors may lead to new therapeutics to help prevent mothers from developing metabolic disorders,” he added.
This work was supported by grants from the National Research Foundation (NRF) and the National Research Council of Science and Technology (NST) of Korea, the National Institutes of Health (NIH), the Larry L. Hillblom Foundation, and the Health Fellowship Foundation.
Image credit: Professor Hail Kim, KAIST
Image usage restrictions: News organizations may use or redistribute this image, with proper attribution, as part of news coverage of this paper only.
Publication:
Moon, J. H et al. (2020) ‘Lactation improves pancreatic β cell mass and function through serotonin production.’ Science Translational Medicine, 12, eaay0455. Available online at https://doi.org/10.1126/scitranslmed.aay0455
Profile: Hail Kim, MD, PhD
hailkim@kaist.edu
Associate Professor
Graduate School of Medical Science and Engineering (GSMSE)
Korea Advanced Institute of Science and Technology (KAIST)
Profile: Hak Chul Jang, MD, PhD
janghak@snu.ac.kr
Professor
Division of Endocrinology and Metabolism
Seoul National University Bundang Hospital (SNUBH)
President
Korean Diabetes Association
Profile: Joon Ho Moon, MD, PhD
moonjoonho@gmail.com
Clinical Fellow
Division of Endocrinology and Metabolism
SNUBH
Profile: Hyeongseok Kim, MD, PhD
hskim85kor@gmail.com
Assistant Professor
Chungnam National University (CNU)
Profile: Professor Michael S. German, MD
Michael.German@ucsf.edu
Professor
Diabetes Center
University of California, San Francisco (UCSF)
(END)
2020.04.29 View 37872 -
Highly Efficient and Stable Double Layer Solar Cell Developed
Solar cells convert light into energy, but they can be inefficient and vulnerable to the environment, degrading with, ironically, too much light or other factors, including moisture and low temperature. An international research team has developed a new type of solar cell that can both withstand environmental hazards and is 26.7% efficient in power conversion.
They published their results on March 26 in Science.
The researchers, led by Byungha Shin, a professor from the Department of Materials Science and Engineering at KAIST, focused on developing a new class of light-absorbing material, called a wide bandgap perovskite. The material has a highly effective crystal structure that can process the power needs, but it can become problematic when exposed to environmental hazards, such as moisture. Researchers have made some progress increasing the efficiency of solar cells based on perovskite, but the material has greater potential than what was previously achieved.
To achieve better performance, Shin and his team built a double layer solar cell, called tandem, in which two or more light absorbers are stacked together to better utilize solar energy. To use perovskite in these tandem devices, the scientists modified the material’s optical property, which allows it to absorb a wider range of solar energy. Without the adjustment, the material is not as useful in achieving high performing tandem solar cells. The modification of the optical property of perovskite, however, comes with a penalty — the material becomes hugely vulnerable to the environment, in particular, to light.
To counteract the wide bandgap perovskite’s delicate nature, the researchers engineered combinations of molecules composing a two-dimensional layer in the perovskite, stabilizing the solar cells.
“We developed a high-quality wide bandgap perovskite material and, in combination with silicon solar cells, achieved world-class perovskite-silicon tandem cells,” Shin said.
The development was only possible due to the engineering method, in which the mixing ratio of the molecules building the two-dimensional layer are carefully controlled. In this case, the perovskite material not only improved efficiency of the resulting solar cell but also gained durability, retaining 80% of its initial power conversion capability even after 1,000 hours of continuous illumination. This is the first time such a high efficiency has been achieved with a wide bandgap perovskite single layer alone, according to Shin.
“Such high-efficiency wide bandgap perovskite is an essential technology for achieving ultra-high efficiency of perovskite-silicon tandem (double layer) solar cells,” Shin said. “The results also show the importance of bandgap matching of upper and lower cells in these tandem solar cells.”
The researchers, having stabilized the wide bandgap perovskite material, are now focused on developing even more efficient tandem solar cells that are expected to have more than 30% of power conversion efficiency, something that no one has achieved yet,
“Our ultimate goal is to develop ultra-high-efficiency tandem solar cells that contribute to the increase of shared solar energy among all energy sources,” Shin said. “We want to contribute to making the planet healthier.”
This work was supported by the National Research Foundation of Korea, the Korea Institute of Energy Technology Evaluation and Planning, the Ministry of Trade Industry and Energy of Korea, and the U.S. Department of Energy.
Other contributors include Daehan Kim, Jekyung Kim, Passarut Boonmongkolras, Seong Ryul Pae and Minkyu Kim, all of whom affiliated with the Department of Materials Science and Engineering at KAIST. Other authors include Byron W. Larson, Sean P. Dunfield, Chuanxiao Xiao, Jinhui Tong, Fei Zhang, Joseph J. Berry, Kai Zhu and Dong Hoe Kim, all of who are affiliated with the National Renewable Energy Laboratory in Colorado. Dunfield is also affiliated with the Materials Science and Engineering Program at the University of Colorado; Berry is also affiliated with the Department of Physics and the Renewable and Sustainable Energy Institute at the University of Colorado Boulder; and Kim is also affiliated with the Department of Nanotechnology and Advanced Materials Engineering at Sejong University. Hee Joon Jung and Vinayak Dravid of the Department of Materials Science and Engineering at Northwestern University; Ik Jae Park, Su Geun Ji and Jin Young Kim of the Department of Materials Science and Engineering at Seoul National University; and Seok Beom Kang of the Department of Nanotechnology and Advanced Materials Engineering of Sejong University also contributed.
Image credit: Professor Byungha Shin, KAIST
Image usage restrictions: News organizations may use or redistribute this image, with proper attribution, as part of news coverage of this paper only.
Publication: Kim et al. (2020) “Efficient, stable silicon tandem cells enabled by anion-engineered wide band gap perovskites”. Science. Available online at https://doi.org/10.1126/science.aba3433
Profile:
Byungha Shin
Professor
byungha@kaist.ac.kr
http://energymatlab.kaist.ac.kr/
Department of Materials Science and Engineering
KAIST
Profile:
Daehan Kim
Ph.D. Candidate
zxzx4592@kaist.ac.kr
http://energymatlab.kaist.ac.kr/
Department of Materials Science and Engineering
KAIST
(END)
2020.03.27 View 38350 -
KAIST GSAI and SNUBH Join Hands for AI in Healthcare
< Dean Song Chong (left) and Director Chang Wan Oh (right)
at the KAIST GSAI - SNUBH MOU Signing Ceremony >
The Graduate School of AI (GSAI) at KAIST and the Seoul National University Bundang Hospital (SNUBH) signed a memorandum of understanding (MOU) to cooperate in AI education and research in the field of healthcare last month. The two institutions have agreed to collaborate on research and technology development through the implementation of academic and personnel exchange programs.
The GSAI, opened in August 2019 as Korea’s first AI graduate school, has been in the forefront of nurturing top-tier AI specialists in the era of Fourth Industrial Revolution. The school employs a two-track strategy that not only provides students with core AI-related courses on machine learning, data mining, computer vision, and natural language processing, but also a multidisciplinary curriculum incorporating the five key fields of healthcare, autonomous vehicles, manufacturing, security, and emerging technologies. Its faculty members are "the cream of the crop” in their early 40s, achieving world-class performance in their respective fields.
SNUBH opened the Healthcare Innovation Park in 2016, the first hospital-led convergence research complex among Korean medical institutions. It is leading future medical research in five specialized areas: medical devices, healthcare ICT, human genetics, nano-machines, and regenerative medicine.
The Dean of the GSAI, Song Chong, said, “We have set the stage for a cooperative platform for continuous and efficient joint education and research by the two institutions.” He expressed his excitement, saying, “Through this platform and our expertise in AI engineering and medicine, we will lead future AI-based medical technology.”
The Director of the SNUBH Research Division, Chang Wan Oh, stressed that “the mutual cooperation between the two institutions will become a crucial turning point in AI education and research, which is at the core of future healthcare.” He added, “Through a high level of cooperation, we will have the ability to bring about global competitiveness and innovation.”
(END)
2019.12.27 View 17769 -
Early Genome Catastrophes Can Cause Non-Smoking Lung Cancer
Some teenagers harbor catastrophic changes to their genomes that can lead to lung cancer later on in life, even if they never smoke
(Professor Young Seok Ju at the Graduate School of Medical Science and Engineering)
Catastrophic rearrangements in the genome occurring as early as childhood and adolescence can lead to the development of lung cancer in later years in non-smokers. This finding, published in Cell, helps explain how some non-smoking-related lung cancers develop.
Researchers at KAIST, Seoul National University and their collaborators confirmed that gene fusions in non-smokers mostly occur early on, sometimes as early as childhood or adolescence, and on average about three decades before cancer is diagnosed. The study showed that these mutant lung cells, harboring oncogenic seeds, remain dormant for several decades until a number of further mutations accumulate sufficiently for progression into cancer. This is the first study to reveal the landscape of genome structural variations in lung adenocarcinoma.
Lung cancer is the leading cause of cancer-related deaths worldwide, and lung adenocarcinoma is its most common type. Most lung adenocarcinomas are associated with chronic smoking, but about a fourth develop in non-smokers. Precisely what happens in non-smokers for this cancer to develop is not clearly understood.
Researchers analyzed the genomes of 138 lung adenocarcinoma patients, including smokers and non-smokers, with whole-genome sequencing technologies. They explored DNA damage that induced neoplastic transformation.
Lung adenocarcinomas that originated from chronic smoking, referred to as signature 4-high (S4-high) cancers in the study, showed several distinguishing features compared to smoking-unrelated cancers (S4-low).
People in the S4-high group were largely older, men and had more frequent mutations in a cancer-related gene called KRAS. Cancer genomes in the S4-high group were hypermutated with simple mutational classes, such as the substitution, insertion, or deletion of a single base, the building block of DNA.
But the story was very different in the S4-low group. Generally, mutational profiles in this group were much more silent than the S4-high group. However, all cancer-related gene fusions, which are abnormally activated from the merging of two originally separate genes, were exclusively observed in the S4-low group.
The patterns of genomic structural changes underlying gene fusions suggest that about three in four cases of gene fusions emerged from a single cellular crisis causing massive genomic fragmentation and subsequent imprecise repair in normal lung epithelium.
Most strikingly, these major genomic rearrangements, which led to the development of lung adenocarcinoma, are very likely to be acquired decades before cancer diagnosis. The researchers used genomic archaeology techniques to trace the timing of when the catastrophes took place.
Researchers started this study seven years ago when they discovered the expression of the KIF5B-RET gene fusion in lung adenocarcinoma for the first time. Professor Young-Seok Ju, co-lead author from the Graduate School of Medical Science and Engineering at KAIST says, “It is remarkable that oncogenesis can begin by a massive shattering of chromosomes early in life. Our study immediately raises a new question: What induces the mutational catastrophe in our normal lung epithelium.”
Professor Young Tae Kim, co-lead author from Seoul National University says, “We hope this work will help us get one step closer to precision medicine for lung cancer patients.”
The research team plans to further focus on the molecular mechanisms that stimulate complex rearrangements in the body, through screening the genomic structures of fusion genes in other cancer types.
This study was supported by the National Research Foundation of Korea (NRF), Korea Health Industry Development Institute (KHIDI), Suh Kyungbae Foundation, the College of Medicine Research Foundations at Seoul National University and others.
Figure.
(Smoking-unrelated oncogenesis of lung cancers by gene fusions)
Publication.
Jake June-Koo Lee, Seongyeol Park et al., Tracing Oncogene Rearrangements in the Mutational History of Lung Adenocarcinoma
Cell 177, June 13 2019, online publication ahead of print at May 30, 2019
https://doi.org/10.1016/j.cell.2019.05.013
Profile: Prof Young Seok Ju, MD, PhD
ysju@kaist.ac.kr
http://julab.kaist.ac.kr
Associate Professor
Graduate School of Medical Science and Engineering (GSMSE)
Korea Advanced Institute of Science and Technology (KAIST)
Daejeon 34141, Korea
Profile: Prof Young Tae Kim, MD, PhD
ytkim@snu.ac.kr
Professor
Seoul National University Cancer Research Institute
Department of Thoracic and Cardiovascular Surgery
Seoul National University Hospital Seoul 03080, Korea
2019.05.31 View 67539 -
KAIST Identifies the Cause of Sepsis-induced Lung Injury
(Professor Pilhan Kim from the Graduate School of Medical Science and Engineering)
A KAIST research team succeeded in visualizing pulmonary microcirculation and circulating cells in vivo with a custom-built 3D intravital lung microscopic imaging system. They found a type of leukocyte called neutrophils aggregate inside the capillaries during sepsis-induced acute lung injury (ALI), leading to disturbances and dead space in blood microcirculation.
According to the researchers, this phenomenon is responsible for tissue hypoxia causing lung damage in the sepsis model, and mitigating neutrophils improves microcirculation as well as hypoxia.
The lungs are responsible for exchanging oxygen with carbon dioxide gases during the breathing process, providing an essential function for sustaining life. This gas exchange occurs in the alveoli, each surrounded by many capillaries containing the circulating red blood cells.
Researchers have been making efforts to observe microcirculation in alveoli, but it has been technically challenging to capture high-resolution images of capillaries and red blood cells inside the lungs that are in constant breathing motion.
Professor Pilhan Kim from the Graduate School of Medical Science and Engineering and his team developed an ultra-fast laser scanning confocal microscope and an imaging chamber that could minimize the movement of a lung while preserving its respiratory state. They used this technology to successfully capture red blood cell circulation inside the capillaries of animal models with sepsis.
During the process, they found that hypoxia was induced by the increase of dead space inside the lungs of a sepsis model, a space where red blood cells do not circulate. This phenomenon is due to the neutrophils aggregating and trapping inside the capillaries and the arterioles. It was also shown that trapped neutrophils damage the lung tissue in the sepsis model by inhibiting microcirculation as well as releasing reactive oxygen species.
Further studies showed that the aggregated neutrophils inside pulmonary vessels exhibit a higher expression of the Mac-1 receptor (CD11b/CD18), which is a receptor involved in intercellular adhesion, compared to the neutrophils that normally circulate. Additionally, they confirmed that Mac-1 inhibitors can improve inhibited microcirculation, ameliorate hypoxia, while reducing pulmonary edema in the sepsis model.
Their high-resolution 3D intravital microscope technology allows the real-time imaging of living cells inside the lungs. This work is expected to be used in research on various lung diseases, including sepsis.
The research team’s pulmonary circulation imaging and precise analytical techniques will be used as the base technology for developing new diagnostic technologies, evaluating new therapeutic agents for various diseases related to microcirculation.
Professor Kim said, “In the ALI model, the inhibition of pulmonary microcirculation occurs due to neutrophils. By controlling this effect and improving microcirculation, it is possible to eliminate hypoxia and pulmonary edema – a new, effective strategy for treating patients with sepsis.”
Their 3D intravital microscope technology was commercialized through IVIM Technology, Inc., which is a faculty startup at KAIST. They released an all-in-one intravital microscope model called ‘IVM-CM’ and ‘IVM-C’. This next-generation imaging equipment for basic biomedical research on the complex pathophysiology of various human diseases will play a crucial role in the future global bio-health market.
This research, led by Dr. Inwon Park from the Department of Emergency Medicine at Seoul National University Bundang Hospital and formally the Graduate School of Medical Science and Engineering at KAIST, was published in the European Respiratory Journal (2019, 53:1800736) on March 28, 2019.
Figure 1. Custom-built high-speed real-time intravital microscope platform
Figure 2. Illustrative schematic and photo of a 3D intravital lung microscopic imaging system
Figure 3. Aggregation of neutrophils and consequent flow disturbance in pulmonary arteriole in sepsis-induced lung injury
2019.05.07 View 49776 -
Lens-free OLEDs with Efficiency comparable to that of Inorganic LEDs
(from left: Professor Seunghyup Yoo and PhD candidate Jinouk Song)
The use of organic light-emitting diodes (OLEDs) has extended to various applications, but their efficiency is still lagging behind inorganic light-emitting diodes. In this research, a KAIST team provided a systematic way to yield OLEDs with an external quantum efficiency (EQE) greater than 50% with an external scattering medium.
Having properties suitable for thin and flexible devices, OLEDs are popular light sources for displays, such as mobile devices and high quality TVs. In recent years, numerous efforts have been made to apply OLEDs in lighting as well as light sources for vehicles.
For such applications, high efficiency is of the upmost importance for the successful deployment of light sources. Thanks to continuous research and the development of OLEDs, their efficiency is steadily on the rise, and a level equivalent to inorganic LEDs has been demonstrated in some reports.
However, these highly efficient OLEDs were often achieved with a macroscopic lens or complex internal nanostructures, which undermines the key advantages of OLEDs as an affordable planar light sources and tends to hinder their stable operation, thus putting a limitation to their commercialization.
Among various methods proven effective for OLED light extraction, a team led by Professor Seunghyup Yoo at the School of Electrical Engineering focused on the external scattering-based approach, as it can maintain planar geometry and compatibility with flexibility. It is also able to be fabricated on a large scale at a low cost and causes no interference with electrical properties of OLEDs.
Conventionally, research on enhancing OLED light extraction using light scattering has been conducted empirically in many cases. This time, the team developed comprehensive and analytical methodology to theoretically predict structures that maximize efficiency.
Considering OLEDs with the external scattering layers as a whole rather than two separate entities, the researchers combined the mathematical description of the scattering phenomena with the optical model for light emission within an OLED to rapidly predict the characteristics of many devices with various structures. Based on this approach, the team theoretically predicted the optimal combination of scattering layers and OLED architectures that can lead to the maximum efficiency.
Following this theoretical prediction, the team experimentally produced the optimal light scattering film and incorporated it to OLEDs with orange emitters having a high degree of horizontal dipole orientation. As a result, the team successfully realized OLEDs exhibiting EQE of 56% and power efficiency of 221 lm/W. This is one of the highest efficiencies ever realized for an OLED unit device without the help of a macroscopic lens or internal light extraction structures.
Professor Yoo said, “There are various technologies developed for improving OLED light extraction efficiency; nevertheless, most of them have not reached a level of practical use. This research mainly provides a systematic way to attain an EQE of 50% or higher in OLEDs while keeping in mind the constraints for commercialization. The approach shown here can readily be applied to lighting devices or sensors of wearable devices.”.
This research, co-led by Professor Jang-Joo Kim from Seoul National University and Professor Yun-Hi Kim from Gyeongsang National University, was published in Nature Communications on August 10, 2018. (J. Song et al. Nature Communications, 9, 3207. DOI: 10.1038/s41467-018-05671-x)
Figure 1.Photographs of OLEDs with SiO₂ -embedded scattering layers according to scatterance
2018.10.26 View 14946 -
KAIST Student Wins HRI Student Design Competition
(From left: Jason Jangho Choi, Hyunjin Ku and Wonkyung Do)
Hyunjin Ku from the Department of Mechanical Engineering won the first prize at the Student Design Competition of Human-Robot-Interaction (HRI) 2018 which was held in Chicago.
Ku teamed up with undergrad students from Seoul National University (Jason Jangho Choi, Soomin Lee, Sunho Jang, and Wonkyung Do) and submitted Shelly, a tortoise-like robot for one-to-many interactions with children.
Figure 1. Shelly, a tortoise-like robot for one-to-many interactions with children
In the Student Design Competition of the HRI, students from around the globe can submit designs for their interactive robotic objects. The competition focused on human-agent interactions and practical applications.
Ku conducted the research while doing an internship at NAVER Labs. Her research on learning robot abuse with Shelly was published in IEEE Spectrum.
[YTN Science]
https://www.youtube.com/watch?v=n5KVwgBk0wk
[HRI 2018 Website]
http://humanrobotinteraction.org/2018/sdc/
[IEEE Spectrum]
https://spectrum.ieee.org/automaton/robotics/robotics-hardware/shelly-robotic-tortoise-helps-kids-learn-that-robot-abuse-is-a-bad-thing
2018.07.02 View 16163