Institute of Economic Research

AKIYAMA Takayuki

Papers

1.	Disseminated intravascular coagulation is associated with poor prognosis in patients with COVID-19. (Peer-reviewed) Satoshi Gando, Takayuki Akiyama Scientific reports Vol.14,No.1,pp.12443 2024.5
2.	Steroid initiation timing and outcome of coronavirus disease 2019 patients: A multicenter, retrospective, observational study. (Peer-reviewed) Ryu Sugimoto, Tsuneaki Kenzaka, Ayako Mikami, Nobuaki Matsunaga, Takayuki Akiyama, Norio Ohmagari, Hogara Nishisaki International journal of immunopathology and pharmacology Vol.37,pp.3946320231216314 2023.11
3.	Clinical efficacy of remdesivir for COVID-19 in children: A propensity-score-matched analysis (Peer-reviewed) Kensuke Shoji, Yusuke Asai, Takayuki Akiyama, Shinya Tsuzuki, Nobuaki Matsunaga, Setsuko Suzuki, Noriko Iwamoto, Takanori Funaki, Isao Miyairi, Norio Ohmagari Journal of Infection and Chemotherapy Vol.29,No.9 2023.9
4.	Temporal trends in microbial detection during the COVID-19 pandemic: Analysis of the Japan surveillance for Infection Prevention and Healthcare Epidemiology (J-SIPHE) database (Peer-reviewed) Akira Endo, Yusuke Asai, Taichi Tajima, Mio Endo, Takayuki Akiyama, Nobuaki Matsunaga, Haruhiko Ishioka, Shinya Tsuzuki, Norio Ohmagari Journal of Infection and Chemotherapy Vol.29,No.1 2023.1
5.	Comparison of clinical characteristics of COVID-19 in pregnant women between the Delta and Omicron variants of concern predominant periods (Peer-reviewed) Kensuke Shoji, Shinya Tsuzuki, Takayuki Akiyama, Nobuaki Matsunaga, Yusuke Asai, Setsuko Suzuki, Noriko Iwamoto, Takanori Funaki, Masaki Yamada, Nobuaki Ozawa, Koushi Yamaguchi, Isao Miyairi, Norio Ohmagari Journal of Infection and Chemotherapy Vol.29,No.1 2023.1
6.	Predictive model of risk factors of High Flow Nasal Cannula using machine learning in COVID-19 (Peer-reviewed) Nobuaki Matsunaga, Keisuke Kamata, Yusuke Asai, Shinya Tsuzuki, Yasuaki Sakamoto, Shinpei Ijichi, Takayuki Akiyama, Jiefu Yu, Gen Yamada, Mari Terada, Setsuko Suzuki, Kumiko Suzuki, Sho Saito, Kayoko Hayakawa, Norio Ohmagari Infectious Disease Modelling Vol.7,No.3 2022.9
7.	Impact of dementia, living in a long-term care facility, and physical activity status on COVID-19 severity in older adults (Peer-reviewed) Shinya Tsuzuki, Takayuki Akiyama, Nobuaki Matsunaga, Norio Ohmagari 2022.7
8.	Comparison of the clinical characteristics and outcomes of COVID-19 in children before and after the emergence of Delta variant of concern in Japan (Peer-reviewed) Kensuke Shoji, Takayuki Akiyama, Shinya Tsuzuki, Nobuaki Matsunaga, Yusuke Asai, Setsuko Suzuki, Noriko Iwamoto, Takanori Funaki, Norio Ohmagari Journal of Infection and Chemotherapy Vol.28,No.4,pp.591-594 2022.4
9.	Impact of regional heterogeneity on the severity of COVID-19 (Peer-reviewed) Shinya Tsuzuki, Yusuke Asai, Nobuaki Matsunaga, Haruhiko Ishioka, Takayuki Akiyama, Norio Ohmagari Journal of Infection and Chemotherapy Vol.28,No.4,pp.554-557 2022.4
10.	Clinical characteristics of COVID-19 in hospitalized children during the Omicron variant predominant period (Peer-reviewed) Shoji, K., Akiyama, T., Tsuzuki, S., Matsunaga, N., Asai, Y., Suzuki, S., Iwamoto, N., Funaki, T., Ohmagari, N. Journal of Infection and Chemotherapy Vol.28,No.11 2022
11.	Clinical Characteristics and Outcomes of Coronavirus Disease 2019 (COVID-19) in Pregnant Women: A Propensity Score-Matched Analysis of Data from the COVID-19 Registry Japan (Peer-reviewed) Shoji, K., Tsuzuki, S., Akiyama, T., Matsunaga, N., Asai, Y., Suzuki, S., Iwamoto, N., Funaki, T., Yamada, M., Ozawa, N., Yamaguchi, K., Miyairi, I., Ohmagari, N. Clinical Infectious Diseases Vol.75,No.1 2022
12.	Association between physical activity status and severity of COVID-19 in older adults (Peer-reviewed) Tsuzuki, S., Akiyama, T., Matsunaga, N., Ohmagari, N. Epidemiology and Infection Vol.150 2022
13.	Clinical Characteristics of Hospitalized COVID-19 in Children: Report from the COVID-19 Registry in Japan (Peer-reviewed) Shoji, K., Akiyama, T., Tsuzuki, S., Matsunaga, N., Asai, Y., Suzuki, S., Iwamoto, N., Funaki, T., Ohmagari, N. Journal of the Pediatric Infectious Diseases Society Vol.10,No.12 2021
14.	Improved penicillin susceptibility of Streptococcus pneumoniae and increased penicillin consumption in Japan, 2013-18 (Peer-reviewed) Tsuzuki, S., Akiyama, T., Matsunaga, N., Yahara, K., Shibayama, K., Sugai, M., Ohmagari, N. PLoS ONE Vol.15,No.10 October 2020
15.	High-Speed Optical Camera Communication Using an Optimally Modulated Signal (Peer-reviewed) Masanori Sugimoto, Hayato Kumaki, Takayuki Akiyama, Hiromichi Hashizume ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings Vol.2018-April,pp.3739-3743 2018.9
16.	Time-of-arrival-based smartphone localization using visible light communication (Peer-reviewed) Takayuki Akiyama, Masanori Sugimoto, Hiromichi Hashizume 2017 International Conference on Indoor Positioning and Indoor Navigation, IPIN 2017 Vol.2017-January,pp.1-7 2017.11
17.	Poster Abstract: OFDM Visible Light Communication using Off-the-shelf Video Camera Shota Shimada, Hiromichi Hashizume, Takayuki Akiyama, Masanori Sugimoto SenSys 2017 - Proceedings of the 15th ACM Conference on Embedded Networked Sensor Systems Vol.2017-January 2017.11
18.	Poster: Multicamera synchronization for smartphones using optimally modulated illuminations Koki Kudo, Masanori Sugimoto, Takayuki Akiyama, Hiromichi Hashizume MobiSys 2017 - Proceedings of the 15th Annual International Conference on Mobile Systems, Applications, and Services pp.148- 2017.6
19.	Optimally Modulated Illumination for Rapid and Accurate Time Synchronization (Peer-reviewed) Sugimoto, M., Kumaki, H., Akiyama, T., Hashizume, H. IEEE Transactions on Signal Processing Vol.65,No.2 2017
20.	Time-of-arrival-based indoor smartphone localization using light-synchronized acoustic waves (Peer-reviewed) Akiyama, T., Sugimoto, M., Hashizume, H. IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences Vol.E100A,No.9 2017
21.	A spot-controllable data transfer technique using COTS speakers Masanari Nakamura, Takayuki Akiyama, Hiromichi Hashizume, Masanori Sugimoto 2016 International Conference on Indoor Positioning and Indoor Navigation, IPIN 2016 2016.11
22.	SyncSync: Time-of-arrival based localization method using light-synchronized acoustic waves for smartphones Takayuki Akiyama, Masanori Sugimoto, Hiromichi Hashizume 2015 International Conference on Indoor Positioning and Indoor Navigation, IPIN 2015 2015.12
23.	A rapid and accurate time-synchronization technique for acoustic localization using modulated illumination Hayato Kumaki, Masanori Sugimoto, Hiromichi Hashizume, Takayuki Akiyama, Taishi Saito 2015 International Conference on Indoor Positioning and Indoor Navigation, IPIN 2015 2015.12
24.	Light-synchronized acoustic ToA measurement system for mobile smart nodes Takayuki Akiyama, Masanori Sugimoto, Hiromichi Hashizume IPIN 2014 - 2014 International Conference on Indoor Positioning and Indoor Navigation pp.749-752 2014
25.	3D FDM - PAM: Rapid and precise indoor 3D localization using acoustic signal for smartphone Masanari Nakamura, Takayuki Akiyama, Masanori Sugimoto, Hiromichi Hashizum UbiComp 2014 - Adjunct Proceedings of the 2014 ACM International Joint Conference on Pervasive and Ubiquitous Computing pp.123-126 2014
26.	Smart phone localization method using dual-carrier acoustic waves Takayuki Akiyama, Masanari Nakamura, Masanori Sugimoto, Hiromich Hashizume 2013 International Conference on Indoor Positioning and Indoor Navigation, IPIN 2013 2013

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Presentations

No.	Name of subject/Conference Name	Year	Site
1.	Prevalence and significance of disseminated intravascular coagulation in COVID-19(43RD INTERNATIONAL SYMPOSIUM ON INTENSIVE CARE & EMERGENCY MEDICINE)	Holding date : 2024.3.19 - 2024.3.22 Presentation date : 2024.3
2.	High-Speed Optical Camera Communication Using an Optimally Modulated Signal.(2018 IEEE International Conference on Acoustics, Speech and Signal Processing(ICASSP))	Holding date : 2018 Presentation date : 2018
3.	Time-of-arrival-based smartphone localization using visible light communication.(2017 International Conference on Indoor Positioning and Indoor Navigation(IPIN))	Holding date : 2017 Presentation date : 2017
4.	Poster: Multicamera Synchronization for Smartphones using Optimally Modulated Illuminations.(Proceedings of the 15th Annual International Conference on Mobile Systems, Applications, and Services(MobiSys))	Holding date : 2017 Presentation date : 2017
5.	OFDM Visible Light Communication using Off-the-shelf Video Camera.(Proceedings of the 15th ACM Conference on Embedded Network Sensor Systems(SenSys))	Holding date : 2017 Presentation date : 2017
6.	A spot-controllable data transfer technique using COTS speakers.(International Conference on Indoor Positioning and Indoor Navigation(IPIN))	Holding date : 2016 Presentation date : 2016
7.	SyncSync: Time-of-arrival based localization method using light-synchronized acoustic waves for smartphones.(2015 International Conference on Indoor Positioning and Indoor Navigation(IPIN))	Holding date : 2015 Presentation date : 2015
8.	A rapid and accurate time-synchronization technique for acoustic localization using modulated illumination.(2015 International Conference on Indoor Positioning and Indoor Navigation(IPIN))	Holding date : 2015 Presentation date : 2015

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