Vol.4, January 2024

ContentsNews
 Building Bridges for Future Partnerships: UEC President Shunichi Tano and Director Kazuaki
Oya Cultivate Collaborations in New ZealandVideo Profiles：Research Condensed matter physics: Materials science at ultra-high 1000 T magnetic fields

Video Profiles：Innovation
 AINet: AI for Innovative Wireless Networking

The University of Electro-Communications 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585© 2024 The University of Electro-Communications.

Vol.4, January 2024

News

Building Bridges for Future Partnerships: UEC President Shunichi Tano and DirectorKazuaki Oya Cultivate Collaborations in New Zealand
In a significant stride towards global academic collaboration, President Shunichi Tano and Member ofthe Board of Directors Kazuaki Oya of UEC visited New Zealand from December 4 to 8. The delegation,accompanied by key university representatives, visited the three major cities of Auckland, Wellington,and Christchurch.
One of the highlights of their visit was the inaugural UoA・UEC Trans-Pacific Symposium on Advanced
Science and Engineering 2023, held in collaboration with the University of Auckland. The symposium,
conducted in a hybrid format on December 4th, featured presentations from both institutions.
Notable among them was Professor Yasuhiro Minami's insightful talk on "A new perspective on
vocabulary spurt: A longitudinal data analysis of early vocabulary development in Japanese infants."
Dr. Patrice Delmas from the University of Auckland shared ongoing research at the IVSLab, sparking
dynamic discussions. Plans are in place to expand participation and continue the symposium in theyears to come.
The collaborative spirit extended beyond the symposium, with visits to institutions including Auckland
University of Technology, Victoria University of Wellington, and the University of Canterbury.
Discussions centered on the potential for future collaboration, including international exchangeagreements. Positive responses were received, indicating a promising future for academicpartnerships.
Not limiting their engagements to academia, the delegation also explored opportunities with private
enterprises. Visits to companies like Allied Telesis Ltd. and Volpara Health led to discussions on hosting
UEC students for internships and collaborating on research projects.
Diplomatic efforts were not overlooked, as the delegation visited the Japanese Embassy andConsulate General in each city. Here, they outlined the vision of UEC, seeking understanding andcooperation for fostering collaboration between UEC and New Zealand.
This visit serves as a catalyst for future initiatives, and UEC is committed to further enhancing its
collaboration with New Zealand in the areas of academia, industry, and diplomatic relations. UEC willcontinue to share updates about this exciting global partnership.

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Vol.4, January 2024

Attendees at the UoA・UEC Trans-Pacific Symposium on Advanced Science and Engineering 2023.

Consul General of Japan in Auckland Matsui and President Tano.

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Vol.4, January 2024

Visit to the Japanese Embassy in New Zealand

Visit to the Japanese Consular Office in Christchurch

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Vol.4, January 2024

Video Profile：ResearchCondensed matter physics: Materials science at ultra-high 1000 T magnetic fields
Akihiko Ikeda
Assistant Professor, Department of Engineering Science
Akihiko Ikeda introduces his research on condensed matter physics, particularly the effects of highmagnetic fields up to 1000 Tesla on materials. Under these extreme magnetic conditions, changes
occur not only in electron spin but also in the electronic, phononic, optical, and lattice states. Ikeda’s
primary goal is to observe material phase transitions leading to entirely new crystal structures uniqueto very high magnetic fields.
The realm of very high magnetic fields remains largely unexplored due to experimental andtheoretical challenges. Ikeda describes an experimental technique known as a destructive pulsemagnet, utilizing electromagnetic flux compression. The process involves compressing theelectromagnetic field to achieve magnetic fields ranging from a few hundred to a thousand Tesla.
However, after field generation, the coil is consistently damaged, illustrating the difficulties in thispioneering work.
To delve into such exotic high magnetic fields, new techniques for material science need development.
Ikeda describes his development of a strain gauge using an optical fiber called fiber Bragg grating,enabling magnetostriction measurements up to a thousand Tesla. “This technique revealed a newphase of matter in the perovskite-structured cobaltite LaCoO3,” says Ikeda. “We expect to uncover
more material properties in the 1000 Tesla region.”
At the University of Electro-Communications (UEC), Ikeda has created a portable 100 Tesla generator
named PINK to explore the microscopic properties of materials at such high magnetic fields. The
experimental process involves exploding the coil, generating 77 Tesla at SACLA, the x-ray free electronlaser (XFEL) facility in Japan. The XFEL pulse is synchronized with the highest magnetic field generation,
enabling X-ray diffraction measurements at 77 Tesla. The second generation of PINK is currently underdevelopment, aiming to conduct X-ray measurements above 100 Tesla in the near future.
“The exploration of 1000 Tesla magnetic fields extends beyond material science, encompassing abroader range of scientific disciplines such as molecular science, biology, plasma physics, andfundamental sciences like particle physics,” explains Ikeda. “I welcome newcomers and encourage
further collaborations both within and outside the UEC, on this entirely new frontier of science.”
References
Related papers
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Vol.4, January 2024

Spin state ordering of strongly correlating LaCoO3 induced at ultrahigh magnetic fields
A. Ikeda, T. Nomura, Y. H. Matsuda, A. Matsuo, K. Kindo, K. SatoPhys. Rev. B 93, 220401(R) (2016)
DOI: https://doi.org/10.1103/PhysRevB.93.220401
High-speed 100 MHz strain monitor using fiber Bragg grating and optical filter for magnetostriction
measurements under ultrahigh magnetic fields
A. Ikeda, T. Nomura, Y. H. Matsuda, S. Tani, Y. Kobayashi, H. Watanabe, K. Sato
Rev. Sci. Instrum. 88, 083906 (2017).
DOI: https://doi.org/10.1063/1.4999452
Record indoor magnetic field of 1200 T generated by electromagnetic flux-compression
D. Nakamura, A. Ikeda, H. Sawabe, Y. H. Matsuda, and S. Takeyama
Rev. Sci. Instrum. 89, 095106 (2018)
DOI: https://doi.org/10.1063/1.5044557
Two spin-state crystallizations in LaCoO3
A. Ikeda, Y. H. Matsuda, K. SatoPhys. Rev. Lett. 125.177202 (2020).
DOI: https://doi.org/10.1103/PhysRevLett.125.177202
Generating 77 T using a portable pulse magnet for single-shot quantum beam experiments
A. Ikeda, Y. H. Matsuda, X. Zhou, S. Peng, Y. Ishii, T. Yajima, Y. Kubota, I. Inoue, Y. Inubishi, K. Tono, M.
YabashiAppl. Phys. Lett., 120, 142403 (2022)
DOI: https://doi.org/10.1063/5.0088134
Signature of spin-triplet exciton condensations in LaCoO3 at ultrahigh magnetic fields up to 600 T
A. Ikeda, Y. H. Matsuda, K. Sato, Y. Ishii, H. Sawabe, D. Nakamura, S. Takeyama, J. Nasu
Nat. Commun. 14, 1744 (2023).
DOI: https://doi.org/10.1038/s41467-023-37125-4

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Vol.4, January 2024

The University of Electro-Communications 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585© 2024 The University of Electro-Communications.

Vol.4, January 2024

Video Profile：Innovation

AINet: AI for Innovative Wireless Networking
Katsuya Suto
Associate Professor, Graduate School of Infomatics and EngineeringAssociate Professor Katsuya Suto and his group is dedicated to revolutionizing wirelesscommunications and networking through the integration of AI technologies.
Suto is focused on the integration of joint source and channel coding using deep neural networks. In
current wireless communication systems like 4G and 5G, source coding caters to user services, but
communication quality suffers due to non-optimized channel coding, leading to issues like block noisein video transmissions.
In contrast, the communication system being developed by Suto tailors both source and channel
coding for user services, mitigating block noise in video transmissions. “We believe this system holds
potential for future applications, such as object detection for autonomous vehicles,” says Suto.
The impact of this new communication system can be seen in remote object detection. Despite aslight decrease in image quality compared to the original, Suto’s system maintains sufficient accuracy
for object detection.
Another application of Suto’s communication system is integration with Google Maps. In the video,
the mobile terminal estimates the radio map of user mobility from Google Maps, training thecommunication system accordingly. This ensures quality of service even in challenging wirelessenvironments, offering stable video transmission during 5G outages.
In another application, Suto is addressing the high cost of radio map construction, by developing alow-cost solution using AI. By utilizing a 3D city model from open datasets like PLATEAU, Suto’s
approach significantly reduces costs. Furthermore, the new system analyzes the radio path
propagation process by the construction of a radio propagation graph. Implemented with shallow
feedforward neural networks, this approach achieves twenty times faster computation than
traditional ray tracing.
“Feel free to reach out for more information about our activities.”

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Vol.4, January 2024

References
1 Junichiro Yamada and Katsuya Suto, "Exploring Pseudo-Analog Video Transmission for Edge-AI
Vision Applications," IEEE Consumer Communications & Networking Conference 2023, Jan. 2023.
DOI: 10.1109/CCNC51644.2023.10059990
2 Katsuya Suto, Shinsuke Bannai, Koya Sato, Kei Inage, Koichi Adachi, and Takeo Fujii, "Image-Driven
Spatial Interpolation with Deep Learning for Radio Map Construction," IEEE Wireless Communications
Letters, vol. 10, no. 6, pp. 1222-1226, June 2021.
DOI: 10.1109/LWC.2021.3062666
3 Tiago Koketsu Rodrigues, Katsuya Suto, Hiroki Nishiyama, Jiajia Liu, and Nei Kato, "Machine Learning
meets Computation and Communication Control in Evolving Edge and Cloud," IEEE Communications
Surveys and Tutorials, vol. 22, no. 1, pp. 38-67, first quarter 2020.
DOI: 10.1109/COMST.2019.2943405

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