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[E-news Today Metropolitan 1 Reporting Headquarters, Reporter Okyung Kwon] Professor Hyunhee Park of the University of Seoul (UOS, President Yong-geol Won) Department of Electrical and Computer Engineering (also a member of the Department of Intelligent Semiconductor Engineering), along with Professor Namkyoo Park and Professor Sunkyu Yu from the Department of Electrical and Computer Engineering (ECE) at Seoul National University (SNU), announced that their joint effort in integrating photonic computing circuits has succeeded. Their findings were published in "Physical Review Letters," the most prestigious journal in the field of physics. Recently, research aiming to utilize light in computation has been actively pursued, particularly in the fields of artificial intelligence and quantum computing, to overcome the physical limitations of electronic technology represented by the end of Moore's Law. This study introduces a new approach to utilizing light in computation within the fields of artificial intelligence and quantum computing. By employing light in computation, various functions provided by artificial intelligence, such as inference, classification, and regression, can be performed at ultra-high speeds with low power consumption. Furthermore, it can maintain stable quantum states even at room temperature, making it applicable for circuit implementation in quantum computers. However, there have been challenges due to the extreme speed of light, which propagates at a rate of 300 million meters per second. This has led to exponential increases in the size of computation systems and the number of required gates, making it difficult to perform computations. For an optical neural network composed of N neurons, the size of the network is proportional to N’s square (N^2). For instance, in a photonic circuit designed for deep learning that occupies an area of approximately 10x10 cm2, computations involving up to only a maximum of one thousand neurons were feasible. To overcome this limitation, the research team confined light in resonators and demonstrated that all computations required for deep learning and quantum computing could be achieved by changing the state of the medium. Through the use of a time-axis approach, they proved that up to one million neuron computations could be performed in a circuit as small as 10x10 cm2. In this study led by Professor Hyunhee Park, researchers succeeded in achieving integration by replacing spatial-axis information processing with time-axis-based processing. As a result, the implementation of photon circuits integrated at the level of VLSI (Very Large Scale Integrated Circuit) has become possible. Professor Hyunhee Park stated, "With the ability to implement computations necessary for quantum computers, we aim to focus on the implementation of quantum circuits in the future." This research was conducted through the support of the Mid-career Researcher Program, the Basic Research Laboratory (BRL) Program, and the Excellent Young Researcher Program of the Ministry of Science & ICT, as well as the Creative Leading Researcher Support Program at Seoul National University. Source: https://ece.snu.ac.kr/ece/news?md=v&bbsidx=55411 News Article From: Enews Today (http://www.enewstoday.co.kr) Translated by: Jiyong Yoo, English Editor of the Department of Electrical and Computer Engineering, cyoo7@snu.ac.kr ...
Mar 18, 2024
Seoul National University's (SNU’s) College of Engineering, Department of Electrical and Computer Engineering (ECE), announced on the 5th that they have achieved great honor by winning numerous awards, including the Special Award in the university division, at the 30th Samsung Humantech Paper Award. The event was hosted by Samsung Electronics and co-sponsored by the Ministry of Science & ICT, and Joongang Ilbo. ECE laboratories of professors Kyunghan Lee, Wooyoung Choi, Jongseon Roh, Jaejoon Kim, Wooseok Choi, Jinho Lee, and Jaehyouk Choi, received a total of 10 awards, including two gold awards. This achievement led them to be honored with the "Special Award for Most Awards in the University Division" and Professor Kyunghan Lee of SNU ECE also received the Special Award for Most Supervised Paper Submissions. Unlike individual awards that are presented individual recipients for their outstanding achievements, special awards are given to universities, high schools, and supervising professors who have demonstrated excellence in their performance. In the university division, Seoul National University received gold awards (with a prize of 20 million won each) in three out of the ten individual award categories. Among these three gold awards, two were awarded to students from the ECE department. In the field of Communication and Networks, student Jongyun Lee was honored with the gold award for his paper on a learning-based congestion control technique designed to adapt in real-time to previously unseen network environments. In the area of Devices and Processes, student Jiseong Im was honored with the gold award for his paper on the implementation of a high-density and highly efficient three-dimensional AND-type fully parallel convolutional block. Additionally, ECE students Seongjun Park and Jonghyun Go were awarded silver medals, while Jihee Kim, Wooseung Nam, Shinik Park, Jongseok Park, Jungwook Hong, and Hongsun Jang received honorable mentions. The Humantech Paper Award was established in the year 1994 with the aim of identifying scientists and researchers who are to lead science and technology of the 21st century, among domestic and international university/graduate students and high school students. This year marks the 30th edition of the award, with a total of 1,189 papers submitted and 115 selected as award-winning papers. Seoul National University's ECE department has consistently produced numerous award winners at the Samsung Humantech Paper Award over the past years. Source: https://ece.snu.ac.kr/ece/news?md=v&bbsidx=55410 Translated by: Jiyong Yoo, English Editor of the Department of Electrical and Computer Engineering, cyoo7@snu.ac.kr...
Mar 12, 2024
[ECE Department] SNU ECE Wins Numerous Awards Including the
Seoul National University's (SNU’s) College of Engineering, Department of Electrical and Computer Engineering (ECE, President Yongtaek Hong) achieved great honor by winning numerous awards, including the Special Award in the university division, at the 30th Samsung Humantech Paper Award. The event was hosted by Samsung Electronics and co-sponsored by the Ministry of Science & ICT, and Joongang Ilbo. ECE laboratories of professors Kyunghan Lee, Wooyoung Choi, Jongseon Roh, Jaejoon Kim, Wooseok Choi, Jinho Lee, and Jaehyouk Choi, received a total of 10 awards, including two gold awards. This achievement led them to be honored with the "Special Award for Most Awards in the University Division" and Professor Kyunghan Lee of SNU ECE also received the Special Award for Most Supervised Paper Submissions. Unlike individual awards that are presented individual recipients for their outstanding achievements, special awards are given to universities, high schools, and supervising professors who have demonstrated excellence in their performance. In the university division, Seoul National University received gold awards (with a prize of 20 million won each) in three out of the ten individual award categories. Among these three gold awards, two were awarded to students from the ECE department. In the field of Communication and Networks, student Jongyun Lee (Advisor: Professor Kyunghan Lee, Co Authors: Dr. Jeongmin Bae, Student Jaeyoon Hwang) was honored with the gold award for his paper on a learning-based congestion control technique designed to adapt in real-time to previously unseen network environments. In the area of Devices and Processes, student Jiseong Im (Advisor: Professor Wooyoung Choi, Co Authors: Students Jangseng Kim, Jonghyun Ko, Jeonghyun Kim) was honored with the gold award for his paper on the implementation of a high-density and highly efficient three-dimensional AND-type fully parallel convolutional block. Additionally, ECE students Seongjun Park (Advisor: Professor Jongseon Roh) and Jonghyun Go (Advisor: Professor Jaejoon Kim) were awarded silver medals, while Jihee Kim, Wooseung Nam, Shinik Park, Jongseok Park, Jungwook Hong, and Hongsun Jang received honorable mentions. The Humantech Paper Award was established in the year 1994 with the aim of identifying scientists and researchers who are to lead science and technology of the 21st century, among domestic and international university/graduate students and high school students. This year marks the 30th edition of the award, with a total of 1,189 papers submitted and 115 selected as award-winning papers. Seoul National University's ECE department has consistently produced numerous award winners at the Samsung Humantech Paper Award over the past years. The following table shows the detailed information of the awards received. Author Type Field of Research Advisor Department Jongyun Lee Gold Communication & Networks Kyunghan Lee ECE Department Jiseong Im Gold Physical Devices & Processes Wooyoung Choi ECE Department Seongjun Park Silver Communication & Networks Jongseon Roh ECE Department Jonghyun Go Silver Physical Devices & Processes Jaejoon Kim ECE Department Jihee Kim Honorable Mentions Circuit Design Wooseok Choi ECE Department Wooseung Nam Honorable Mentions Communication & Networks Kyunghan Lee ECE Department Shinik Park Honorable Mentions Communication & Networks Kyunghan Lee ECE Department Jongseok Park Honorable Mentions Computer Science & Engineering Kyunghan Lee ECE Department Jungwook Hong Honorable Mentions Computer Science & Engineering Jinho Lee ECE Department Hongsun Jang Honorable Mentions Computer Science & Engineering Jinho Lee ECE Department *Yoohwan Shin Silver Circuit Design Jaehyouk Choi ECE Department *Seheon Jang Bronze Circuit Design Jaehyouk Choi ECE Department *Students from universities other than SNU. Image from the Awarding Event (Video Link : https://www.youtube.com/watch?v=DkmYzcMfoP4&t=25s ) Source: https://ece.snu.ac.kr/ece/news?md=v&bbsidx=55423 Translated by: Jiyong Yoo, English Editor of the Department of Electrical and Computer Engineering, cyoo7@snu.ac.kr ...
Mar 14, 2024
Deogkyoon Jeong (left in the photo), honorary chair professor in the Department of Electrical and Computer Engineering at Seoul National University, and Jinho An (right), a professor in the Department of Advanced Materials Engineering at Hanyang University and concurrently the Vice President of Research at Hanyang University, have been selected as the recipients of the 7th Daewon Kang Award, as announced by the Permanent Operating Committee of the Korea Semiconductor Academic Conference on the 25th. The Daewon Kang Award was established in 2017 to honor Dr. Kang Dae-won, who made significant contributions to the advancement of semiconductor technology. Source: https://ece.snu.ac.kr/ece/news?md=v&bbsidx=54259 Translated by: Jiyong Yoo, English Editor of the Department of Electrical and Computer Engineering, cyoo7@snu.ac.kr ...
Jan 26, 2024
The Applied Superconductivity Lab in the Department of Electrical and Computer Engineering at Seoul National University, led by Professor Seungyong Hahn, has announced a groundbreaking broadband filter capable of dramatically reducing quantum signal loss in superconducting quantum computers. This achievement was made through collaborative research with the Korea Research Institute of Standards and Science (Director: Yongho Lee). The broadband filter, designed under the leadership of Researcher Seonghyeon Park from the Applied Superconductivity Lab, was fabricated and measured with the assistance of Senior Researcher Gahyun Choi from the Korea Research Institute of Standards and Science. Superconducting quantum computers utilize qubits made from superconductors to process quantum signals. In the processing of these signals, the issue of quantum signal loss has been a significant engineering challenge. The quantum signal filters proposed previously faced limitations such as large size (~20 mm2), narrow passband width (~200 MHz), and ineffective reduction of losses. These challenges remained obstacles to the development of large-scale quantum computers. Professor Han Seung-yong's research team has successfully developed an ultra-compact quantum signal loss prevention filter with a broadband passband width of 800 MHz, overcoming the previous limitations. The size of the filter is as small as 0.3 mm2. Professor Seungyong Hahn stated in the paper that the ultra-compact filter presented in this study can be applied in various ways to existing superconducting quantum computer systems. He also expressed expectations that by presenting various designs, this research will contribute to the development of scalable and versatile fault-tolerant quantum computing systems. The research findings have been highly praised for their compact design and versatility in the field of applied physics, leading to their selection as Editor’s Pick and publication in the international academic journal Applied Physics Letters. [Related Paper] SH Park, G Choi, G Kim, J Jo, B Lee, G Kim, K Park, Y-H Lee, S Hahn, “Characterization of Broadband Purcell Filters with Compact Footprint for Fast Multiplexed Superconducting Qubit Readout,” Applied Physics Letters, vol. 124, no. 4, p. 044003, 2024. [https://doi.org/10.1063/5.0182642] Figure 1. Implementing existing 10mm2 scale filters into a 500 μm x 580 μm (0.29 mm2) filter, proving its broad passband width and effective quantum signal loss reduction: (a) Magnified image of a filter and measuring chip; (b) Verifying broadband passband width of ~800MHz through frequency response(S21, red solid line) of the filter; (c) Qubit signal lifetime is improved as the number of filters(1: greed dashed line, 2: blue solid line) increase Source: https://ece.snu.ac.kr/ece/news?md=v&bbsidx=54258 Translated by: Jiyong Yoo, English Editor of the Department of Electrical and Computer Engineering, cyoo7@snu.ac.kr...
Jan 26, 2024
Seoul National University's College of Engineering (Dean: Yoosuk Hong) announced that Professor Jeonghun Kwak from the Department of Electrical and Computer Engineering and Professor Keehoon Kang from the Department of Materials Science and Engineering, along with the research team led by Professor Sunghyun Kim from the Department of Carbon Convergence Engineering at Wonkwang University (co-authored by Juhyung Park and Jaegyu Jang), have developed an organic semiconductor thermoelectric device with the world’s highest performance. Thermoelectric generation is a semiconductor-based technology that enables the conversion of waste heat to electrical energy using temperature differences. Currently bulk inorganic thermoelectric semiconductors have been preferred due to their high performance, their field of application has been limited due to their toxic, heavy, rigid characteristics, and poor economic efficiency for low temperature applications. On the other hand, thermoelectric generators based on organic thin film semiconductors are light and thin, and can be manufactured to be flexible & stretchable, able to form conformal contact to curved surfaces. Also, since they are environmentally friendly, they can form direct contact with human skin, potentially appliable to a variety of fields. However, their commercialization has been challenging due to their poor thermoelectric effectiveness compared to their inorganic counterparts. In order to enhance the performance of organic thermoelectric generators, charge concentration of polymers and density of states must be precisely engineered by methods such as molecular doping. However, due to the decrease in the polymer’s crystallinity during the doping process, the thermoelectric effect is weakened, and fundamental understanding of heat & charge transport mechanisms of doped conductive polymers with irregular structures of crystalline and non-crystalline regions is very difficult. Such problems have been a major bottleneck for improving the performance of thermoelectric generators. The joint research team addressed this problem by using a consecutive oxidization-reduction doping, based on trifflic acid to control the density of states for a widely used conductive polymer, PEDOT:PSS. Based on this method, they succeeded in controlling charge concentrations without losing the crystallinity of the PEDOT:PSS thin film, achieving a record high thermoelectric performance of power factor 534.5 μW/mK2. Through charge transport modeling, they also found the theoretical limit for the thermoelectric performance obtainable from their system, and focused on the aspect that even without degradation in crystallinity, experimental results could not reach the theoretical limit. Researcher Juhyung Park, the first author of the corresponding paper conducted analysis on the difference between experimental results and the theoretical limits based on various points of views, including the Hall effect, magnetoconductance, density functional theory. Through his analysis, he clarified, “The change in tie-chain structures of nanometer(nm) scale that connect the polymer’s crystalline regions interrupt the penetration of charge, limiting the performance of thermoelectric generators.” The co-corresponding author, professor Jeonghun Kwak stated, “This study presents a direction for development of high performance organic thermoelectric devices. The study also enables fundamental knowledge of charge transport in polymers, and we expect it to contribute to the development of various organic semiconductor-based electronic devices including thermoelectric generators.” The results of this research were published on the 18th of January online on one of the most prestigious journals in the field of materials, nano technology and science, “Advanced Science”. The research was conducted through support from the Korea Research Foundation's Outstanding Young Researcher Support Program, the Creative Challenge Research Infrastructure Support Program, the Regional University Excellent Scientist Program, and the Information Technology Future Talent Education and Research Team's BK21four program. (From the Left) SNU Professor Jeonghun Kwak, Wonkwang University Professor Sunghyun Kim, SNU Professor Keehoon Kang, SNU Ph. D Juhyung Park, Wonkwang University Ph. D Jaegyu Jang Source: http://www.energy-news.co.kr / https://ece.snu.ac.kr/ece/news?md=v&bbsidx=54257 Translated by: Jiyong Yoo, English Editor of the Department of Electrical and Computer Engineering, cyoo7@snu.ac.kr...
Jan 26, 2024
The Korean Information Processing Society announced on the 25th that Professor Yunheung Baek from the Department of Electrical and Computer Engineering at Seoul National University has been inaugurated as the 29th president in 2024. President Yunheung Baek, obtained a doctoral degree in computer engineering from the University of Illinois, and served as a professor in the Department of Computer Science at the New Jersey Institute of Technology and the Department of Electrical and Electronic Engineering at the Korea Advanced Institute of Science and Technology (KAIST), conducting research on compilers and parallel processing. After assuming a position at Seoul National University, he expanded his research activities to the field of information security, receiving recognition for his achievements with awards such as the National Intelligence Service Director's Award and the Ministry of Public Administration and Security Minister's Award. President Baek has been recognized as a leading expert in the field of computers, publishing over 180 papers in SCI-grade international journals and international academic conferences. He has received numerous awards, including outstanding paper awards and excellence awards in the field of cyber security in conferences held by the Korean Information Science Society and the Korean Information Processing Society. Additionally, he has been honored with awards such as the Samsung Electronics Industry-Academia Collaboration Best Paper Award, the Outstanding Research Award from the College of Engineering at Seoul National University, the Excellent Paper Award from the Federation of Korean Science and Technology Societies, and academic awards and merit awards from the Korean Information Processing Society. He has served as an associate editor, guest editor, and conference chair for IEEE/ACM journals, actively engaging in international academic activities. Furthermore, he has actively participated in various domestic academic activities, serving on editorial boards, boards of directors, and delivering invited lectures for organizations such as the Korean Information Science Society, the Korean Society for Information Security, the Institute of Electrical and Electronics Engineers of Korea, and the SW Emotion Evaluation Society. He has also been involved in diverse academic activities, serving as a consultant and outside director for numerous domestic and international companies. Recently, he held the position of Chairman of the AI Security Research Society of the Korean Society for Information Security and currently serves as the Chairman of the Security Sub-Committee of the Connected Mobility Alliance at the Korea Automotive Research Institute under the Ministry of Trade, Industry and Energy. Additionally, he is the director of the "Information Technology Future Talent Education and Research Group" in the BK21 Four Applied Science in the Electrical and Electronic field. In celebration of the 30th anniversary of the society's founding, the association, along with President Baek, has established a vision to achieve a high-quality publication of papers through the improvement of the society's journals, with the aim of leading future technologies in a research forum where industry, academia, and research institutions blend in together. To realize this vision, the society has outlined four major initiatives: enhancing the quality of papers through improvements in the society's journals, activating the member system and recruiting talented members, strengthening collaboration with industry and national research institutes, and promoting research society and regional chapter activities as well as strengthening inter-society collaboration. To achieve these goals in 2024, Jongsung Hwang, Director of the Korea Institute of Intelligent Information Society Promotion, has been appointed as Senior Vice President. Additionally, 18 Executive Vice Presidents and 20 Executive Directors have been elected to dedicate themselves to the organization's activities. The Korean Information Processing Society was established in 1993 to promote the development and research of information science and technology both domestically and internationally. The society encourages research, education, and industrial applications in information science and technology, playing a crucial role in fostering the exchange and collaboration among experts in the field. Currently, it is one of the largest domestic societies with approximately 20,000 members, including over 1,400 life members and around 6,700 regular and associate members, as well as organizational members. The society operates five regional branches in Gangwon, Gyeonggi-Chungcheong, Yeongnam, Jeju, and Honam, along with 22 specialized research groups, 13 committees, and 4 headquarters. Reporter Donsoo Jeong: dschung@etnews.com 29th president Yunheung Baek of KIPS Source: https://www.etnews.com/20240125000144 Translated by: Jiyong Yoo, English Editor of the Department of Electrical and Computer Engineering, cyoo7@snu.ac.kr...
Jan 26, 2024