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Our departments professor Sung-Yool Choi team’s paper has been selected as the front cover of the July 21st’s version of ‘Nanoscale’. The review article is titled ‘Conductive-bridging random-access memories for emerging neuromorphic computing’
The article proposes the detailed mechanism of CBRAMs and the necessary analog switching characteristics of synapse devices. Further, the article presents CBRAM based architecture for DNN and SNN which can also overcome the large area scaling of CBRAMs for neuromorphic computing systems.

Journal : Nanoscale
Title : Conductive-bridging random-access memories for emerging neuromorphic computing
The article can be seen in the following link. 

[Link]
https://doi.org/10.1039/D0NR01671C

Our departments professor Sung-Yool Choi team’s research has been selected as the front cover of the July 13th’s version of ‘Advanced Electronic Materials’. The article is titled “Vertical‐Tunneling Field‐Effect Transistor Based on WSe2‐MoS2 Heterostructure with Ion Gel Dielectric”.
The team used a heterostructure of MoS2-WSe2, well known 2D materials, and an ion-gel gate to fabricate a p-type vertical tunneling transistor with an SS-value of 36mW/dec. The developed p-type transistor can be integrated with other n-type transistors and can hopefully lower the computing power for future smart sensor networks, autonomous vehicles and high-speed mobile computing systems.
The article can be seen in the following link.

[Link]
https://onlinelibrary.wiley.com/doi/10.1002/aelm.202070030

The textbook ‘Theory of Random Variables’ published by our department’s Professor Iickho Song has been selected by the Ministry of Education and National Academy of Sciences (NAS) as ‘2020 Outstanding Academic Textbook’.
The ministry and NAS has selected 66 humanity, 96 social science, 36 Korean academic, and 73 natural science textbooks totaling 271.
3284 non-international first edition textbooks from 318 publishing companies were submitted from March 2019 to February 2020, and 271 were selected as of July 13.
The ministry annually selects textbooks from various academic fields and distributed them to universities for encouraging publishing and research activities.
The NAS will distribute 26 million KW worth of the selected textbooks in the 2nd half of 2020 after attending a survey on the demands for each university.
We once again congratulate for the selection of Professor Iickho Song’s textbook on “Theory of Random Variables’.
 

Our department’s Professor Yong-Hoon Kim’s research team has presented an alternative for the physical standard theory based on next generation semiconductor device design. The team has founded a theory and software for precisely calculating the energy characteristics of nano-devices, presenting an alternative for the standard theory of quantum transportation. 
The standard theory for quantum transportation founded in the late 20th century describes nano-devices as an open quantum system composed of 2 infinite electrodes connected by a channel. There have been numerous efforts to understand the mechanism of transistors, solar cells, LEDs and other semiconductor devices by this theory but was not able to fully describe the energy of the devices, thus apply it for design.
To overcome this obstacle, the research team presumed the non-equilibrium state of the nano-device as a closed quantum system and interpreted the transportation of the electron from one electrode to the other as an optical excitation. The team also developed a theory and software for minimizing the energy of the device. By using this method, one can understand not only the current-voltage characteristics but also the energy characteristics, which is critical for designing energy transforming devices such as batteries, fuel cells, and catalysts where device design is done on the atom scale.
This research supported by the Ministry of Science Technology and Communication, National Research Foundation, Nano Material Development Project, Basic Research Development Project, and Global Frontier Project was published in Science Advances on July 1st.

Professor June-Koo Rhee’s research team developed a non-linear quantum machine-learning artificial intelligence algorithm through collaborative research with German and South African research teams.
Through this study, a non-linear kernel was devised to enable quantum machine learning of complex data. In particular, the quantum supervised learning algorithm developed by Professor June-Koo Rhee’s research team can be calculated with a minimal amount of computation. Therefore, the algorithm presents the possibility of overtaking current AI technologies that require large amounts of computation.
Professor June-Koo Rhee’s research team developed quantum forking technology that generates train and test data through quantum information and enables parallel computation of quantum information. A simple quantum measurement technique has been combined to create a quantum algorithm system that implements non-linear kernel-based supervised learning that efficiently calculates similarities between quantum data. The research team successfully demonstrated quantum supervised learning on real quantum computers through IBM cloud services. Research professor Kyung-Deock Park (KAIST) participated as the first author. The result of this study was published in the 6th volume of May 2020, ‘npj Quantum Information’, a sister journal of the international journal Nature. (Title: Quantum classifier with tailored quantum kernel).

Furthermore, the research team theoretically proved that it is possible to implement various quantum kernels through the systematic design of quantum circuits. In kernel-based machine learning, the optimal kernel may vary depending on the given input data. Therefore, being able to implement various quantum kernels efficiently is a significant achievement in the practical application of quantum kernel-based machine learning.

Research professor Kyung-Deock Park said, “The kernel-based quantum machine learning algorithm developed by the research team will surpass traditional kernel-based supervised learning in the era of hundreds of qubits of Noisy Intermediate-Scale Quantum (NISQ) computing, which is expected to be commercialized in the next few years. The developed algorithm will be actively used as a quantum machine learning algorithm for pattern recognition of complex non-linear data.”

Meanwhile, this research was carried out with the support of the Korea Research Foundation’s Creative Challenge Research Foundation Support Project, the Korea Research Foundation’s Korea-Africa Cooperation Foundation Project, and the Information and Communication Technology Expert Training Project (ITRC) supported by the Institute for Information and Communications Technology Promotion.
You can find information on related articles in the link below.

Congratulations again on Professor June-Koo Rhee’s research team for their outstanding performance in the field of quantum computing.

Professor Dongsu Han Appointed as Program Chair of ACM CoNEXT 2020 Conference

Our department’s Professor Dongsu Han has been appointed as the program chair of the 16th ACM CoNEXT(International Conference on emerging Networking EXperiments and Technologies).

The ACM CoNEXT is a conference held by the computer network group (SIG) ACM SIGCOMM and is known as one of the most distinguished conferences among the Korean Information Science Community. Professor Han has become the first program chair from an Asian Institute.

Professor will become the co-chairperson along with Professor Anja Feldmann from the Max Planck Institue for Informatics and has appointed 40 researchers including our department’s Professor Kim Song Min as committe members.

The conference will accept paper during late June and will be held from December 1-4.

Again we congradulate the appointment of Professor Dongsu Han as program chair.

 

[Link]

https://conferences2.sigcomm.org/co-next/2020/#!/home

 

Our department Professor Sung‐Yool Choi and material science department Professor Il-Doo Kim’s joint research has been posted as the inside back cover paper for ‘Advanced Science’ journal published this April 8th, title as “Low‐Thermal‐Budget Doping of 2D Materials in Ambient Air Exemplified by Synthesis of Boron‐Doped Reduced Graphene Oxide”.

The research shows that photothermal processing can be performed on graphene, a well known 2-dimensional material, on a low thermal budget in air. In the suggested procedure, graphene was doped by boron and achieved a similar concentration that usually obtained via a long procedure in a vacuum system. The procedure can be applied to large areas enabling mass production.

The article can be found in the link below.

[Link]

https://onlinelibrary.wiley.com/doi/abs/10.1002/advs.201903318

https://onlinelibrary.wiley.com/doi/abs/10.1002/advs.202070039

At the ISSCC (IEEE International Solid-State Circuit Conference), the most distinguished conference in the field of circuits, Ph.D. student Jin-Su Lee (Advised by Hoi-Jun Yoo) won the award of “Demonstration Session Certificate of Recognition”.
ISSCC 2020 was held in San Francisco, USA, from February 16th to February 20th.
The award details are as follows.
Award name: Demonstration Session Certificate of Recognition (Awarded to top two school-demos presented at ISSCC 2020)
Award winner: Ph.D. student Jin-Su Lee (Advised by Hoi-Jun Yoo)
This achievement is meaningful in that Professor Hoi-Jun Yoo’s lab has received the “Demonstration Session Certificate of Recognition” twice in a row, this year as well as last year.
Congratulations once again for the award of Ph.D. student Jin-Su Lee.

Professor Min-Kyu Je has been named as the ‘Distinguished Lecturer’ supported by the Circuits and Systems Society (CASS) of the Institute of Electrical and Electronics Engineers (IEEE). As the world’s largest society in the field of circuit and system, IEEE CASS selects a number of world-renowned scholars who lead research in this field with outstanding research results as ‘Distinguished Lecturers’ every year. The selected scholars get the opportunity to conduct guest lectures at more than 120 chapters around the world. 
This gives the members of the society a chance to gain knowledge of the latest research trends and outstanding achievements and to communicate directly with the Distinguished Lecturer.
Professor Min-Kyu Je has been recognized as an excellent researcher in the field of circuits and systems for next-generation medical devices and brain-neural interfaces. He will be working as a Distinguished Lecturer for two years from this year to 2021, and give out lectures on the theme of ‘integrated circuits and microsystems for biomedical applications’. A list of IEEE CASS Distinguished Lecturers can be found at the link below.
Congratulations again to Professor Min-Kyu Je!
[Link] https://ieee-cas.org/distinguished-lectures

Professor Jae-Hyouk Choi has been nominated as the Distinguished Lecturer of the IEEE Solid-State Circuits Society (SSCS). IEEE SSCS is the world’s largest integrated-circuit society with more than 10,000 members worldwide. IEEE SSCS is responsible for publishing and hosting the Journal of Solid-State Circuits (JSSC), IEEE Xplore’s largest downloaded journal, and the International Solid-State Circuits Conferences (ISSCC), the most authoritative conference in semiconductor circuits.  
IEEE SSCS selects about ten world-renowned scholars who lead research in this field with outstanding research results as ‘Distinguished Lecturers’ every year. This selection is more meaningful because the IEEE SSCS supports the selected distinguished researchers to travel around the world to give invited lectures and international conferences hosted by the IEEE, as well as at universities and research institutions around the world.
Professor Jae-Hyouk Choi was selected for his excellence in research in the field of RF/analog circuits for 5G and 6G communications. He will give a lecture on the subject of ‘Ultra-low-noise, high-frequency signal generation circuit research’, which is essential for the implementation of next-generation ultra-high-speed wired and wireless communication systems for two years from this year to 2021.
A list of current and past IEEE SSCS Distinguished Lecturers can be found at the link below.
Congratulations again to Professor Jae-Hyouk Choi!
[Link] https://sscs.ieee.org/dl-program/distinguished-lecturer-roster?highlight=WyJkbCIsImRsJ3MiLCJyb3N0ZXIiLCJkbCByb3N0ZXIiXQ==