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On February 13, the 2025 Winter Commencement Ceremony of Ajou University’s Graduate School of International Studies was held in the Yulgok Hall Auditorium, from which 70 graduates across four departments received their degrees. The degree ceremony proceeded in the following order: Opening Remarks, Introduction of VIPs, Opening Show, Report on Academic Affairs, Commencement Address, Congratulatory Remarks, Conferral of the Awards (Presidential Award, Dean’s Award, and Thesis Excellence Award), Graduate Representative’s Remarks, Closing Remarks, and a Group Photo Session. Faculty members from each department, representatives from the Embassy of Uzbekistan in Korea, and officials from the Graduate School of Business and Entrepreneurship (GSBE) of Uzbekistan attended to celebrate the graduates. The 70 graduates who earned their degrees at the Graduate School come from eight countries including Bangladesh, Nepal, and Uzbekistan. Among them, the International Management program had the largest number of graduates with 48 students, followed by the International Trade program with 9, the Civil Society program with 6, and the International Development Cooperation program with 7. In his congratulatory remarks, Dean Byeong-Yun Chang quoted the poetry of Yun Dong-ju to celebrate the new beginnings of the graduates. Shakhzod Kurbanov, Education Counsellor of the Embassy of Uzbekistan in Korea, also took the stage to offer heartfelt congratulations and encouragement to the students. Following the official ceremonies, two student speakers shared their reflections. Ferdous Jannatul from Bangladesh, recipient of the President’s Award, said, “Studying at the Graduate School has given me confidence in myself and made me stronger. I am grateful for the support and encouragement from the professors and staff.” Toirov Saidjasirkhon, representing participants in the dual-degree program between Ajou University and the Graduate School of Business and Economics of Uzbekistan, commented, “The journey to receiving this degree was not easy, but the valuable experiences at Ajou have strengthened me and made it possible to realize my dreams.” Ajou University has been operating a dual-degree program with the Graduate School of Business and Economics (GSBE) in Uzbekistan since 2022. In this program, students complete two semesters at their home institution and two semesters at Ajou University to earn degrees from both institutions. This year marks the third graduation cohort, with 16 graduates in the current ceremony and a total of 58 graduates since the program’s inception. Below is the list of award recipients from the 2025 Academic Year Spring Degree Conferment Ceremony:■ Presidential Award – International Development Cooperation: FERDOUS JANNATUL (Bangladesh) – International Business: TAJIBAEV JETKERBAY UBAYKHANOVICH (Uzbekistan)■ Dean’s Award – International Business: DIPTY MOUMITA MEHJABIN (Bangladesh) – International Business: RAKHMEDOVA DILNOZA ASHRAPKHUJA KIZI (Uzbekistan) – International Trade: MIA MD RASEL (Bangladesh) – International Development Cooperation: RATSIMBAZAFY MANOA FENOSOA (Madagascar) – Civil Society: LAMA ANJU (Nepal)■ Thesis Excellence Award – International Business: CHANDRA BIPUL (Bangladesh) – International Business: MAHESWARI LAKSITA IFFAT (Indonesia) – International Development Cooperation: ESHONKULOV KODIRJON YOKUBOVICH (Uzbekistan)
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- 작성자OIA
- 작성일2026-03-05
- 876
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Ajou University has been selected as an “Excellent Certified University,” the highest designation, in the 4th cycle (2025) evaluation of the International Education Quality Assurance System (IEQAS), jointly administered by the Ministry of Education, the Ministry of Justice, and the National Research Foundation of Korea.The International Education Quality Assurance System (IEQAS) is designed to enhance the internationalization capacity of Korean universities and to assess the quality of educational environments and management systems for international students. The certification is granted based on a comprehensive evaluation of institutions’ recruitment and management of international students, academic program operations, student support services, and overall internationalization infrastructure.In this evaluation, Ajou University was recognized for its stable and systematic operation of academic programs and support services for international students, as well as its effective student management system. In particular, the university’s continuous efforts in developing curricula and support programs tailored to international students were positively reflected in the assessment.With this designation, Ajou University will retain its status as an “Excellent Certified University” for one year, from March 2026 to February 2027. Institutions with this status receive administrative benefits, including simplified visa screening procedures for international students, and are awarded additional points in the selection process for host universities under the Global Korea Scholarship (GKS) program.Ajou University will continue to strengthen its internationalization capacity and further enhance educational and support environments for international students.
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626
- 작성자OIA
- 작성일2026-03-05
- 969
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Ajou University has entered the top 400 for the first time in the 2026 rankings published by Times Higher Education (THE), the British university-ranking organization. Among comprehensive universities in South Korea, Ajou achieved 8th place, up one notch from 9th last year.This year’s global university evaluation covered 2,191 institutions across 115 countries and assessed based on using 17 indicators from five categories: Teaching, Research Environment, Research Quality, International Outlook, and Industry. The THE ranking is known to place more emphasis on research and teaching conditions rather than just traditional reputation.Ajou University previously entered the top 500 in both 2024 and 2025. With this year’s leap into the top 400, the university has demonstrated its consistent advancement. In the Research Quality category Ajou’s score rose by 4.5 points to 58.4, and recorded a substantial 11.6 point increase to 59.4 in the International Outlook category — both contributing to the rise in ranking.
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624
- 작성자OIA
- 작성일2025-10-29
- 12754
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A research team from Ajou University has proposed a method to mass-produce high-purity metal nanoparticles through a light-assisted nanomaterial synthesis technique. This breakthrough is expected to be widely applicable in next-generation artificial sensory systems and neuromorphic devices that mimic the human brain, where precise sensing capabilities are essential.Led by Professor Sungjun Park from the Department of Electrical and Computer Engineering and the Department of Intelligent Semiconductor Engineering, the team introduced a novel strategy for producing high-purity metal nanoparticles without chemical reactions, using a light-based laser ablation in liquid (LAL) technique. This approach allows for the synthesis of nanoparticles free of organic residues on a large scale.The research findings were published in July in a review article titled “Scalable metal-based nanoparticle synthesis via laser ablation in liquids for transformative sensory and synaptic devices” in the prestigious journal International Journal of Extreme Manufacturing (Impact Factor 21.3, top 0.7% in JCR in manufacturing and process engineering).The study was led by Dr. Junkyu Choi from Ajou University’s Institute of Information & Electronics Research, with Sukhyeon Baek, a Ph.D. student in the Department of Intelligent Semiconductor Engineering, as a co-author. Junghoon Lee, a Ph.D. candidate in the same department and currently working at Samsung Electronics DS Division's Materials Technology Team, also participated as a co-corresponding author, along with Professor Sungjun Park.Artificial sensory systems are technologies that mimic the human five senses, converting external stimuli into electrical signals. These technologies are rapidly gaining attention as essential components in various fields, including: the metaverse, extended reality (XR), wearable medical devices, human-machine interfaces. There is increasing demand for applying lighter and more flexible materials, instead of bulky hardware, to real-life applications. As a result, research into next-generation artificial sensory systems is accelerating.In such devices, metal nanoparticles play a crucial role in maximizing sensor performance, thanks to their tunable electrical, optical, and chemical properties. In sensory applications, they enhance sensitivity and response speed to external stimuli while maintaining high selectivity and stability in complex signal environments.In neuromorphic devices, metal nanoparticles enable precise control of synaptic responses and plasticity, serving as key components in implementing biomimetic learning functions. These properties greatly contribute to improving the precision and efficiency of next-generation artificial sensory systems.However, conventional nanoparticle synthesis methods rely on physical techniques requiring high-temperature vacuum equipment, or wet-chemical reactions using surfactants and reducing agents.These approaches involve complex processes and often leave organic residues on the particles, which can degrade electrical properties and reduce sensor reliability. Moreover, they face significant limitations in large-area fabrication and mass production, posing challenges for commercialization.To address these issues, the Ajou University team focused on "Laser Ablation in Liquids (LAL)", a non-contact, physical-based synthesis method that enables the production of high-purity metal nanoparticles without chemical reactions. Unlike traditional physical deposition methods that yield only a few hundred milligrams per hour, the proposed LAL technology can achieve production rates of over 8 grams per hour, significantly boosting its potential for real-world industrial applications.Laser ablation in liquids process (left) and actual formation of nanoparticles (right) The review paper also holds significant value in that it expands the application potential of Laser Ablation in Liquids (LAL)-based metal nanoparticles beyond their conventional use in catalysis and electrochemistry, extending it to the broader field of the electronics industry. In particular, the study demonstrates that applying high-purity nanoparticles synthesized via LAL to next-generation artificial sensory systems—such as electronic skin (e-skin), neuromorphic devices, and wearable electronics, where precise detection of external stimuli is critical—enables both long-term stability and high sensitivity.This work clearly highlights the potential for expansion into various smart electronic applications, including: human–machine interaction, AI-based robotics, medical monitoring technologies. Through this, the research offers a new direction for the electronics industry as a whole.Professor Sungjun Park stated, “This achievement goes beyond introducing a new technique—it represents a turning point for ‘light-based nanomanufacturing technologies’ that could drive the commercialization of next-generation smart sensors and neuromorphic systems. It marks a major milestone for the materials and sensor industries, both domestically and internationally.”He further emphasized, “To realize commercial applications, follow-up studies on long-term storage stability and synthesis optimization of LAL-based metal nanoparticles are essential. A strategic roadmap is needed to bridge foundational nanotechnology and real-world industrial deployment.”This research was supported by the National Research Foundation of Korea (NRF) through the Nano·Materials Technology Development Program, including the Global Young Connect Project and the Nano Future Materials Core Technology Development Project.
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622
- 작성자국제교류팀
- 작성일2025-08-20
- 10174
- 동영상동영상
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A joint research team led by Professor Hyungwoo Lee from Ajou University has successfully developed a new foundational technology for a random number generation (RNG) device, offering a novel approach with high potential to advance cryptographic security and artificial intelligence (AI) computing technologies.Professor Lee (Department of Physics and Graduate School of Energy Systems), in collaboration with researchers from several institutions, has proposed a new type of two-level quantum system (TLQS) that minimizes interference from external variables by utilizing discrete fluctuations in tunneling current. This advancement introduces a more stable and secure method for generating physical random numbers.The study, titled "Highly stable two-level current fluctuation in complex oxide heterostructures," was published in Nature Communications in July. Key contributors included Do-Yeob Kim (graduate student, Ajou University) and Professor Jung-Woo Lee (Hongik University), who served as co-first authors. Professors Hyungwoo Lee (Ajou University), Ki-Tae Um (Gachon University, Semiconductor Engineering), and Sunwoo Lee (Inha University, Computer Engineering) led the research as corresponding authors. International collaborators included Professor Tula R. Paudel’s team at the South Dakota School of Mines & Technology and Professor Yongsoo Yang’s group at KAIST.The researchers engineered a highly stable two-level current fluctuation phenomenon using a complex oxide heterostructure composed of SrRuO₃/LaAlO₃/Nb-doped SrTiO₃ (SRO/LAO/Nb:STO). Based on this structure, they developed a physical entropy source suitable for high-quality RNG.Random numbers—sequences generated unpredictably within a defined range—are critical in a wide range of applications, including encryption, cybersecurity, simulations, and gaming. In the context of AI and machine learning, random data is essential for efficient model training, especially in large-scale datasets.Unlike pseudo-random number generators (PRNGs) based on deterministic software algorithms, physical random number generators (PRNGs) leverage inherent randomness in nature, offering true unpredictability and resistance to hacking. This makes them highly valuable for secure computing and is especially crucial for neuromorphic systems, which aim to mimic the human brain’s structure through hardware-based neural networks.Conventional TLQS systems—typically based on Random Telegraph Noise (RTN) caused by charge trapping at defect sites—have struggled with instability due to environmental dependencies. To overcome this, the team intentionally introduced a dual-defect system comprising oxygen vacancies (V_O) and antisite Ti defects (Ti_Al). Their interaction induces discrete fluctuations in tunneling current that are minimally affected by external conditions.The TLQS device demonstrated stable two-level current fluctuations lasting over 169 seconds at room temperature, with operational stability maintained for over a year.Furthermore, the team validated the RNG functionality of their TLQS by converting analog current signals into binary random sequences (0s and 1s) and conducting rigorous randomness evaluations. Results confirmed the TLQS’s ability to generate high-quality random data.To test its practical applicability, the team integrated the TLQS-based random number data into a Very Deep Super-Resolution (VDSR) neural network—a model designed to restore blurry images with high clarity. The TLQS-based RNG data outperformed traditional software-based RNGs (e.g., Numpy Random Generator in Python) in both accuracy and training speed.Randomness is crucial in AI training, as it helps shuffle datasets and initialize neural network parameters, promoting diverse and robust learning. If the randomness is predictable or biased, it can lead to skewed AI behavior—underscoring the value of true, hardware-based RNG.Professor Lee emphasized the practical potential of the device, stating, “The TLQS device we developed is compatible with CMOS semiconductor technology, which is widely used in computers and smartphones. Considering its scalability, this represents a highly practical and foundational technology for RNG.”He added, “This research proposes RNG design at the level of fundamental materials science, with strong implications for future applications in hardware-based cryptographic security and AI computation.”This study was supported by the National Research Foundation of Korea (NRF) through the G-LAMP project, the Mid-Career Research Program, and the Basic Research Laboratory (BRL) program.The image below shows the results of applying different types of random number data to image super-resolution training using a Very Deep Super-Resolution (VDSR) neural network. The leftmost image shows the result without using any random number data, the center image uses pseudo-random numbers generated by Python’s NumPy library, and the rightmost image uses random numbers generated by the newly developed TLQS system. Image above – A conceptual diagram of the two-level quantum system (TLQS) developed by the joint research team, along with a schematic of the implemented material structure. Compared to conventional methods, the TLQS maintains a more stable signal while achieving comparable accuracy and training speed.
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620
- 작성자김채연
- 작성일2025-08-06
- 11191
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Ajou University has successfully concluded its international exchange programs for foreign students_the 2025 Ajou International Summer School (AISS, Ajou International Summer School) and the (ABC, Ajou Bespoke College).The ABC Program ran for two weeks, from July 2 to July 15, beginning with an orientation held at Yulgok Hall. A total of 19 students from partner universities abroad including the University of Wisconsin, University of Southern California, University of South Florida, University of Nevada, Las Vegas, and the University of California, San Diego participated alongside 10 students from Ajou University. The program was designed to foster growth through capstone design projects, corporate field trips, and cultural exchange between international students and their Ajou counterparts. Participants visited companies such as Naver, Samsung Electronics, Gyeonggi Provincial Council, Dentium, Celltrion, and Daewoong Pharmaceutical, and explored Korean culture and history through experiences like visits to the National Museum of Korea, K-POP dance classes, and the Hwaseong Haenggung Palace.The program also included special lectures such as:Data Analysis on Korea's Economic and Cultural Development by Prof. Yoon Cheon-Seok (Global Business)Korea's Industrial History and Growth through Early Entrepreneurship by Prof. Kim Chan-Woo (University-Industry Cooperation)Modern History Rooted in Ancient Korea by Prof. Han Sang-Woo (History)Promoting Historical Content through National Museum Exhibits by Prof. Park Jae-Yeon (Cultural Contents)The AISS program was conducted over a three-week period starting on June 30, concluding with a graduation ceremony on July 18. During the program, students took courses such as:Data Analytics and Business Decision Making by Prof. Lee Sang-Kyu (Endicott College)Macroeconomic Development by Prof. Kim Tae-Bong (Economics)Understanding Korean Culture by Scott Scattergood (Dasan College)Sustainability by Prof. Lee Jae-Young (Environmental Safety Engineering)Korean Language by Professors Jeong Mi-Hye and Jeong Mi-Ji (Dasan College)In addition to classes, students enjoyed various cultural experiences including K-POP dance, traditional Korean cuisine, and visits to Bukchon Hanok Village. They also toured local landmarks such as the Samsung Innovation Museum, Hwaseong Haenggung Palace, and Suwon Media Center, gaining insights into both Korea’s past and present.At the AISS farewell, Prof. Lee Sang-Kyu told the graduates, “If you experienced something here that can only be found in Korea, make sure to record it. It will surely be something worth remembering.” He emphasized the lasting value of the students’ experiences in Korea.Exchange students enjoyed a K-pop danceHwaseong Haenggung Palace Tour
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618
- 작성자국제교류팀
- 작성일2025-07-30
- 10797
- 동영상동영상
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Professor Inhwan Lee’s research team at our university has successfully developed a new synthetic method that allows for flexible design of the structure of semiconducting polymer materials. This advancement enables faster production of polymers used in electronic devices and is expected to contribute significantly to the development of next-generation organic semiconductors.Professor Lee revealed that through a “Multicomponent Polymerization (MCP)” technique, which reacts three different monomers simultaneously, they have developed a technology that precisely controls the sequence inside semiconducting polymers and efficiently implements various structures.This research was published in the July issue of Angewandte Chemie International Edition under the title “Versatile Halide-Pair-Driven Multicomponent Polymerization for Library Synthesis of Sequence-Controlled Semiconducting Dendronized Polymers.” The paper received excellent reviews and was selected as a “Very Important Paper (VIP).”The study involved doctoral student Hae-nam Choi (right in the photo) from the Department of Energy Systems at Ajou University as the first author. Co-authors included Soo-min Go (Master’s graduate, Ajou University), Se-min Son (Integrated Master’s and PhD program, Ajou University), Ji-su Woo (Master’s student, UNIST Department of Energy Chemical Engineering), Hyun-woo Park (PhD student, ETH Zurich Department of Materials), and Dong-jun Lee (Graduate of integrated Master’s and PhD program, Ajou University).Professors Tae-rim Choi (ETH Zurich, Materials), Won-jin Kwak (UNIST, Energy Chemical Engineering), and Hwan-myung Kim (Ajou University, Energy Systems) participated as co-authors, and Professor Inhwan Lee (Ajou University, Department of Chemistry) served as the corresponding author.Poly(triarylamine) (PTAA) polymers are used in various organic electronic devices such as organic light-emitting devices, perovskite solar cells, electrochromic devices, flexible electronics, and battery electrodes. PTAA is especially notable as a hole transport material in perovskite solar cells. However, traditional synthesis of poly(triarylamine) polymers involved complicated multi-step synthesis and purification of reaction intermediates, which posed challenges for commercialization and cost efficiency. The core of this research lies in presenting a new polymerization strategy that precisely controls the polymer sequence by designing the reaction order of three readily available monomers mixed together in a single step.The research team successfully synthesized a library of semiconducting poly(triarylamine) polymers where arylamine and two types of aryl dihalide monomers are connected in a predetermined sequence. They also expanded this strategy to synthesize complex dendronized polymers, greatly broadening the structural diversity of polymers. As a result, poly(triarylamine) polymers and their derivatives used in electronic devices can now be rapidly produced in library form, which is expected to greatly accelerate the development of next-generation organic semiconductors.Professor Inhwan Lee said, “Through this research, we have enabled the cheap and diverse synthesis of expensive polymers in a single reaction step. We also expect this to contribute to improving the performance of organic electronic devices.”This research was supported by the National Research Foundation of Korea’s Mid-career Researcher Support Program, the G-LAMP program, the Carbon to X technology development project for producing useful substances, and the Leading Research Center (MRC) program.Image showing the synthesis process of sequence-controlled semiconducting polymers via sequential C–N coupling reactions
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616
- 작성자국제교류팀
- 작성일2025-07-21
- 10021
- 동영상동영상
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(Photo) Schematic diagram of the energy generation system and mechanism:(a) Autonomous electrical energy harvesting system driven by water circulation due to temperature difference between day and night(b) Water harvesting mechanism using UiO-66-NH₂(c) Electrical energy generation mechanism using Ni3(HITP)2(d) Autonomous water harvesting and sustainable electrical energy generation system under ambient environmental conditions A Korean research team has developed a technology that collects moisture from the air using temperature differences between day and night, and converts it into electrical energy.The joint research team, led by Professor Taekwang Yoon from the Department of Applied Chemistry and Biological Engineering at Ajou University and Principal Researcher Giro Yoon from the Korea Institute of Industrial Technology (KITECH), has introduced an innovative energy harvesting system. This system is capable of generating electricity independently without any external water supply, even in extreme environments such as remote areas or deserts where water is scarce.The results of this research were published in the internationally renowned journal Composites Part B: Engineering (top 1% in JCR), under the title:"Sustainable electrical energy harvesting via atmospheric water collection using dual-MOF systems."The first authors of the study are Ji-Hyun Lee (integrated master’s and Ph.D. program, Hanyang University), Dong-Yeon Kim (Ph.D. candidate, KAIST), and Yong-Gyun Lee (master’s student, Ajou University).Professor Taekwang Yoon and Principal Researcher Giro Yoon served as co-corresponding authors.Traditional water-based energy harvesting technologies rely on the potential difference between wet and dry surfaces to generate electricity, but they have the limitation of requiring a constant external water supply. To overcome this, the research team was inspired by plant transpiration and capillary action, and combined two types of metal-organic frameworks (MOFs)—UiO-66-NH₂ and Ni₃(HITP)₂.As a result, they successfully developed a fully autonomous system that collects moisture from the air and generates electricity on its own.UiO-66-NH₂ absorbs moisture from the cool night air and releases the absorbed moisture during the warmer daytime. The released moisture condenses on the surface of fibers coated with Ni₃(HITP)₂. This condensation causes asymmetric wetting on the fiber surface, generating a potential difference, which allows electricity to flow. Through this process, the research team successfully achieved a maximum power density of 2.6 μW/cm³ and an energy density of 1.1 mJ/cm³.Notably, UiO-66-NH₂ exhibited excellent moisture adsorption and desorption performance, not only under normal conditions but also in low-humidity environments, showing its potential for use in various settings. The team conducted experiments simulating real climate conditions—including desert, coastal, and inland environments—and confirmed that the system could stably generate moisture and electricity autonomously across all tested scenarios.Professor Taekwang Yoon stated:“This research demonstrates the feasibility of a self-sustaining energy harvesting system that can operate without any external power or water supply.We hope it serves as a viable solution in disaster zones or areas with limited access to electricity.”Principal Researcher Giro Yoon added:“This system provides a technological foundation for easy electricity generation, even in extreme climates or regions lacking infrastructure.We expect this to make a meaningful contribution to sustainable energy technologies for a carbon-neutral society.”This research was supported by the National Research Foundation of Korea under the Global Research Infrastructure Cooperation Hub Program.[Energy Harvesting] refers to the technology of collecting energy from natural sources—such as sunlight, vibrations, heat, wind, waves, or even waste energy from daily life—and converting it into usable electrical energy.From the back row, starting from the left : Professor Taekwang Yoon (Ajou University), Researcher Dongyeon Kim (KAIST), Principal Researcher Giro Yoon (KITECH), Researcher Yonggyun Lee (Ajou University), and Researcher Jihyun Lee (Hanyang University)
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614
- 작성자국제교류팀
- 작성일2025-07-21
- 9617
- 동영상동영상
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AISS orientation was held on July 1 at Yeonam Hall, Students overview of the program and interact exchange sessions ABC orientation was held on July 2 at Yulgok Hall. Various program-related information and guidance were provided Ajou University has started its international exchange programs for foreign students: the 2025 Ajou International Summer School (AISS) and the Ajou Bespoke College (ABC) program. The AISS started off on July 1 in Yeonam Hall with an orientation and began its three-week academic session. A total of 64 students from 10 universities across eight countries—including Germany, Lithuania, the Netherlands, France, Spain, Austria, Uzbekistan, and Indonesia—are participating. Among them, 29 students are from Ajou University at Tashkent(AUT). During the program, participants will choose two out of five courses—Data Analysis & Business Decision-Making, Macroeconomic Development, Understanding Korean Culture, Sustainability, and Korean Language—to earn six credits. Beyond academics, students will experience K‑POP dance classes, traditional food experiences, visits to Bukchon Hanok Village, visits to Samsung Innovation Museum, Suwon Hwaseong Haenggung, Suwon Media Center, and more.The ABC program began its orientation on July 2 at Yulgok Hall and runs for 14 days until July 15. This year’s includes 19 students from top U.S. universities—University of Wisconsin, USC, University of South Florida, UNLV, UC San Diego—as well as 10 Ajou University students. Centered on a capstone project led by Professor So Jae‑hyun (Construction & Transportation Engineering), the curriculum also features lectures on data analysis of Korea’s economic and cultural development (Prof. Yoon Cheon‑seok), the history and current state of Korean industry and entrepreneurial spirit (Prof. Kim Chan‑woo), the transformation from ancient to modern Korean history (Prof. Han Sang‑woo), and promoting historical content focusing on National Museum artifacts (Prof. Park Jae‑yeon) . Field trips include visits to Samsung Innovation Museum, Celltrion, DaeWoong, Dentium, Naver, the National Museum, Gyeonggi Provincial Assembly, a Han River cruise, and Suwon Hwaseong, giving participants diverse insights into Korean culture and history.
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612
- 작성자OIA
- 작성일2025-07-04
- 10993
- 동영상동영상
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- Area-Selective Atomic Layer Deposition (AS-ALD) Gains Attention as a Key Breakthrough Technology- Enables Patterning Without Exclusive 'EUV Equipment', Allowing for Customized Fabrication* Caption for the image above: An illustration showing the selective formation of red-colored aluminum oxide (Al₂O₃) only at the grain boundaries — the leakage current pathways — of zirconium dioxide (ZrO₂) through the new area-selective atomic layer deposition (AS-ALD) process developed by the Ajou University joint research team. This technology is expected to maximize storage capacity while minimizing data loss in DRAM devices. Professor Ilkwon Oh’s research team at Ajou University has developed a technology that enhances the precision of semiconductor processes through area-selective atomic layer deposition (AS-ALD). This advancement is expected to play a crucial role in the manufacturing of next-generation miniaturized and high-density semiconductor devices. Professor Ilkwon Oh (Department of Intelligent Semiconductor Engineering and Department of Electrical and Computer Engineering) and a joint research team from the Samsung Advanced Institute of Technology (SAIT) announced their successful development of an AS-ALD technology that can significantly improve the precision of thin film deposition in semiconductor fabrication. Their research was published in the April issue of Advanced Science under the title “Area-Selective Atomic Layer Deposition on Homogeneous Substrate for Next-Generation Electronic Devices.” Minjeong Lee, Byungjun Won, and Youngjin Lim (Master’s students from the Department of Intelligent Semiconductor Engineering at Ajou University) participated as co-first authors, and Professor Ilkwon Oh served as the corresponding author. Dr. Seonghyun Kim and Dr. Jungkyu Song from SAIT also contributed as co-authors. Area-Selective Atomic Layer Deposition (AS-ALD) is a process that enables deposition to occur only on specific areas of a semiconductor substrate. This technology allows precise application of desired materials to selected locations on the semiconductor surface. Traditional Atomic Layer Deposition (ALD), widely used in semiconductor processes, forms uniform thin films across the entire substrate. It has been a key technique in the manufacturing of memory devices such as DRAM and NAND flash, as well as non-memory (system) semiconductors. However, as semiconductor devices continue to shrink and become more densely integrated, there is an increasing demand for selective thin-film deposition to reduce process steps, lower manufacturing costs, minimize error rates, and improve precision and efficiency. Consequently, AS-ALD has emerged as a core next-generation semiconductor processing technology, attracting attention as a breakthrough solution capable of overcoming the technical limits currently facing the semiconductor industry. By employing AS-ALD, many conventional process steps can be eliminated, dramatically lowering manufacturing costs and the potential for errors. Additionally, AS-ALD enables semiconductor patterning without the need for expensive extreme ultraviolet (EUV) lithography equipment, which has been monopolized by certain companies, further intensifying industrial and academic interest. Furthermore, AS-ALD opens possibilities for customized fabrication of new types of three-dimensional micro-semiconductor devices that are difficult to achieve using traditional techniques and equipment. Despite these advantages, the implementation of AS-ALD in actual semiconductor mass production has faced significant challenges. Depending on the chemical materials and substrates used, maintaining precise selective deposition has been difficult, and electrical performance degradation has often been observed when applied to real devices. To overcome these limitations, the Ajou University research team targeted the widely used ZAZ (ZrO₂/Al₂O₃/ZrO₂) capacitor layer structure in DRAM processes. Specifically, they selectively deposited aluminum oxide (Al₂O₃) only at the grain boundaries—the paths where leakage currents typically occur—thereby minimizing unnecessary Al₂O₃ deposition and effectively improving device performance and reliability. * Transmission electron microscope (TEM) images and chemical composition analysis confirmed the selective formation of Al₂O₃ at grain boundaries. Graphs b and c illustrate the concentration of Al depending on the distance from the grain boundaries, verifying the selective deposition of Al₂O₃ at the desired locations. Using zirconium dioxide (ZrO₂) substrates, the research team experimentally analyzed and demonstrated the mechanisms for selective deposition, proving that selective control was feasible. They also confirmed that AS-ALD not only enhances semiconductor device performance but also significantly reduces unwanted leakage currents. This breakthrough suggests a method to maximize storage efficiency in DRAM devices and minimize data loss during device miniaturization, marking an important technical milestone for memory device advancement. Professor Ilkwon Oh stated, "While area-selective atomic layer deposition is essential for overcoming technological barriers in the semiconductor industry, there have been many challenges in applying it to real processes. Our research experimentally demonstrates that selective deposition and control are achievable, representing a significant advance in semiconductor processing technology." He added, "We will continue further research to enhance device performance and improve process efficiency for industrial applications." The Ajou University research team plans to pursue follow-up studies to develop more precise control techniques for atomic layer deposition processes and to explore their industrial applicability.
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610
- 작성자OIA
- 작성일2025-05-02
- 13151
- 동영상동영상
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* In the photo above – from left: Professor Taekwang Yoon (Ajou University), Seonghun Lee (Ph.D. integrated program student, Ajou University), Ji-Young Park (Master’s student, Ajou University), and Hyungseob Yoon (Ph.D. integrated program student, Chung-Ang University). Professor Taekwang Yoon’s research team at Ajou University has developed a natural rubber-based electrolyte additive that dramatically improves the performance and lifespan of supercapacitors. By utilizing eco-friendly and cost-effective materials, this innovation is expected to become a significant milestone in securing the sustainability of supercapacitors, one of the leading high-performance energy storage technologies. Professor Taekwang Yoon (Department of Applied Chemistry and Graduate School of Molecular Science and Technology) and his team announced that they successfully enhanced the performance and durability of supercapacitors by developing a novel electrolyte additive based on biopolymers. Their research findings were published online in the April issue of Energy Storage Materials under the title, “Long-lasting supercapacitor with stable electrode-electrolyte interface enabled by a biopolymer conjugate electrolyte additive.” Professor Yoon served as the corresponding author, with Seonghun Lee (Ph.D. integrated program student at Ajou University), Ji-Young Park (Master’s student at Ajou University), and Hyungseob Yoon (Ph.D. integrated program student at Chung-Ang University) contributing as co-first authors. Supercapacitors are next-generation energy storage devices that offer significant advantages over conventional batteries. They do not use lithium (Li), making them environmentally friendly, and are capable of storing large amounts of electrical energy. With their ability for rapid charge and discharge cycles and their virtually unlimited lifespan, supercapacitors are increasingly seen as a viable alternative to traditional batteries. They are already being utilized as supplementary power sources in fields such as electric vehicles and renewable energy systems, and are expected to find even broader applications in the future. Unlike batteries, which rely on chemical reactions and ion diffusion to store energy, supercapacitors store energy through surface-controlled reactions at the electrode-electrolyte interface. Thus, the stability of this interface plays a critical role in determining the electrochemical performance of supercapacitors. Because of this, ensuring the stability of the electrode-electrolyte interface has been a key research focus for improving supercapacitor performance. Various approaches have been explored, such as ▲polymer coatings ▲the use of self-healing inks based on 3D printing ▲surface modification using atomic layer deposition (ALD) techniques. However, these methods have faced limitations regarding process complexity, environmental concerns, high costs, and scalability challenges for mass production. In particular, maintaining stable interface characteristics over long periods while preserving high power output remains a major challenge. Over time, the electrode-electrolyte interface tends to become unstable, leading to the accumulation of by-products and the deterioration of electrochemical performance. In response, the Ajou University research team set a goal to develop a high-performance system that meets the demands of long-term stability, reliable operation, and environmental sustainability. a. Schematic of the supercapacitor developed by Professor Taekwang Yoon’s team at Ajou University. b. Schematic illustration of the electrode structure. c. Schematic depiction of the electrolyte additive fabrication process. The additive, made from gum kondagogu (a by-product of natural rubber production) and sodium alginate(extracted from seaweed), is eco-friendly, cost-effective, and highly efficient. To solve the instability problem of the electrode-electrolyte interface in conventional supercapacitor systems, the Ajou University research team developed a conjugated KS (gum kondagogu/sodium alginate) additive using eco-friendly natural rubber-derived gum kondagogu and sodium alginate extracted from seaweed. This additive boasts excellent solubility in aqueous electrolytes, improving ion conductivity and mobility, resulting in significantly enhanced performance compared to traditional electrolytes. Notably, adding even a small amount of the KS additive to sulfuric acid (H₂SO₄)-based electrolytes substantially improved interface characteristics. After 30,000 charge-discharge cycles, the capacitance retention rate increased from 58% to 93%. This remarkable result was achieved because the protective layer formed on the electrode surface suppressed by-product generation and facilitated smooth ion and electron transport. Compared to conventional chemically synthesized electrolytes, the KS additive-based electrolyte offers simpler processing and lower costs, making it highly promising for industrial applications. Additionally, the KS additive, being a natural polysaccharide-based biopolymer, is abundant, recyclable, and inexpensive, providing excellent scalability for mass production and large-scale processing. The research team expects that this study will establish a core technology for next-generation eco-friendly energy storage devices. In particular, electrodes made from the same biopolymers as the additive exhibit excellent flexibility and are easily manufacturable on a large scale, making them applicable not only to wearable electronics but also to large-scale energy storage systems. Professor Taekwang Yoon stated, "Through this research, we have significantly improved the electrode-electrolyte interface stability of supercapacitors, developing an eco-friendly and industrially applicable energy storage technology," and added, "We plan to continue with follow-up research aimed at applications in various fields." This research was supported by the Ministry of Science and ICT, the National Research Foundation of Korea, the University of Glasgow Startup Fund, and the AMRITA Seed Grant. *An image showing the flexibility of the large-area KS/CNT electrode developed by the Ajou University research team. The electrode maintains its structural integrity without damage under various mechanical deformations, suggesting its potential application in energy storage systems for wearable electronic devices.
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608
- 작성자OIA
- 작성일2025-05-02
- 11909
- 동영상동영상
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A roundtable meeting was held to discuss ways to enhance universities’ global competitiveness. Minister of Education Lee Ju-ho, Ajou University President Choi Ki-joo, and international students from Ajou University gathered to exchange ideas on the educational environment and conditions.Held on the afternoon of the 9th at Ajou University’s Yulgok Hall, thew meeting was attended by Minister Lee and officials from the Ministry of Education, President Choi and other Ajou University representatives, as well as nine international students currently enrolled at Ajou. National Assembly member Kim Jun-hyuck and Han Sang-shin, President of the National Institute for International Education, were also present.Lee Seok-Won, Vice President for International Affairs, delivered a presentation on the theme of “Strategies to Strengthen Universities’ Global Competitiveness,” followed by a session to hear the reflections and suggestions of the international students. A free discussion among the attendees followed.The event was organized to hear firsthand opinions from international students studying in Korea. The goal is to contribute to the regional development through the recruitment, nurturing, and settlement support of outstanding international students, while enhancing the global competitiveness of Korean universities.Representing Ajou University’s international students, two graduate students and seven undergraduate students participated in the event, sharing their experiences about campus life, academic studies, and difficulties faced. Participants included GKS scholarship recipient Vats Animesh (Graduate School of International Studies, India) and Bayeh Rediet Sahlu (Master’s Program in Medicine, Ethiopia), along with: ▲ Khit Min (Department of Software)▲ Erdenesaikhan Amuujin (Department of Software) ▲ Hasegawa Reo (Department of Software) ▲ Pyae Phyo Thu (Department of Culture and Contents) ▲ Uzun Kubra (Department of Culture and Contents) ▲ Nguyen Thi Lan (Department of Business) ▲ Choo Shue Wen (Department of Korean Language and Literature).This semester, a total of 2,981 international students are enrolled at Ajou University. Of these, 1,505 are in degree programs, of which the majority are in the undergraduate program or the Master’s Degree program at the Graduate School of International Studies, while 1,476 are pursuing non-degree programs such as Korean language studies.Ajou University has established various support programs to assist the growing number of international students in adapting to campus life and succeeding academically. These include: ▲ A dedicated orientation program for new international students ▲ The International Student Council ▲ Specialized counseling support programs ▲ Career development and internship support programs.Additionally, to strengthen Korean language education for international students, the Global Liberal Arts Division offers various courses and extracurricular activities, such as: ▲ Korean Language Buddy Program ▲ Korean Writing Contest ▲ Korean Language Social Gatherings ▲ Writing Clinics.The Ministry of Education is hosting the “Together Tea Talks,” where the Minister personally visits educational institutions to have conversations with students and staff. This event was held as part of the 74th session of the "Together Tea Talks.“Our international graduate student Vats Animesh speaks during the roundtableStudent Uzun Kubra (Department of Culture and Contents, Türkiye) shares her thoughts
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606
- 작성자OIA
- 작성일2025-04-28
- 11383
- 동영상동영상
