Papers - KODERA Sachiko
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Optimization of electrode positions for multi-electrodes tES for deep brain stimulations
H. Nishimoto, S. Kodera, A. Hirata
URSI GASS 2023 2023.08
Language：English Publishing type：Research paper (international conference proceedings) Publisher：URSI GASS
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Characteristics of current perception produced by intermediate-frequency contact currents in healthy adults Reviewed
S. Uehara, A. Yuasa, K. Ushizawa, S. Kodera, Y. Kamimura, A. Hirata, Y. Otaka
Frontiers in Neuroscience 17 1145505 2023.04
Language：English Publishing type：Research paper (scientific journal)
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Projection of COVID-19 positive cases considering hybrid immunity: Case study in Tokyo Reviewed
Sachiko Kodera, Akito Takada, Essam A. Rashed, and Akimasa Hirata
Vaccines 11 ( 3 ) 633 2023.03
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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Whole-Body Exposure System Using Horn Antennas with Dielectric Lens at 28 GHz
Sachiko Kodera, Norika Miura, Yinliang Diao, Miyako Inoue, Takashi Hikage, Kenji Taguchi, Hiroshi Masuda, Akimasa Hirata
IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology 7 ( 1 ) 65 - 72 2023.03
Publishing type：Research paper (scientific journal)
In the revised international guidelines and standard for human protection from electromagnetic fields, the permissible specific absorption rate (SAR) for whole-body exposure has been extended from 3 or 10 GHz to 300 GHz. The rationale for this revision is the extrapolation from findings of conventional radio-frequency exposure and infrared radiation. However, experiments of whole-body exposure in human subjects are limited to a few studies, which were conducted below 6 GHz. In this study, an exposure system at 28 GHz targeting a wide area of the human back was developed, which consists of two horn antennas with a dielectric lens. The effectiveness of the proposed exposure system was evaluated by computational dosimetry and experiments. The computed power absorption and measured distributions in the wave absorber and the back of the human subject were in good agreement. Under the compliance with the local exposure limits, the whole-body average SAR was 0.35 W/kg, which is comparable to the limit for whole-body exposure of 0.4 W/kg for occupational exposure in the international guidelines and standard. The developed exposure system would be useful to evaluate the thermophysiological response to whole-body exposure above 6 GHz.
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Whole-body exposure system using horn antennas with dielectric lens at 28 GHz Reviewed International coauthorship
S. Kodera, N. Miura, Y. Diao, M. Inoue, T. Hikage, K. Taguchi, H. Masuda, and A. Hirata
IEEE Journal of Electromagnetics, RF, and Microwaves in Medicine and Biology 2023.03
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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幼若雄ラットへの5Gミリ波短時間全身ばく露に対するストレス応答の定量的評価 Reviewed
松本 明子, 遠藤 郁実, 井島 悦子, 平田 晃正, 小寺 紗千子, 市場 正良, 土器屋 美貴子, 増田 宏
日本衛生学雑誌 78 ( Suppl. ) S187 - S187 2023.03
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：(一社)日本衛生学会
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Estimation of the number of heat illness patients in eight metropolitan prefectures of Japan: Correlation with ambient temperature and computed thermophysiological responses Reviewed
A. Takada, S. Kodera, K. Suzuki, M. Nemoto, R. Egawa, H. Takizawa, and A. Hirata
Frontiers in Public Health 11 1061135 2023.02
Language：English Publishing type：Research paper (scientific journal)
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Calculated epithelial/absorbed power density for exposure from antennas at 10–90 GHz : Intercomparison study using a planar skin model Reviewed International coauthorship
K. Li, S. Kodera, D. Poljak, Dragan, Y. Diao, K. Sasaki, A. Susnjara, A. Prokop, K. Taguchi, J. Xi, S. Zhang, M. Yao, G. Sacco, M. Zhadobov, W. EI Hajj, and A. Hirata
2023.01
Language：English Publishing type：Research paper (scientific journal)
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The effects of time window averaged mobility on effective reproduction number of COVID-19 viral variants in urban cities Reviewed
S. Kodera, K. Hikita, E. A. Rashed, A. Hirata
Jounal of Urban Health 100 29 - 39 2023.01
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)
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Estimation of mRNA COVID-19 vaccination effectiveness in Tokyo for Omicron variants BA.2 and BA.5 –Effect of social behavior– Reviewed
S. Kodera, Y. Niimi, E. A. Rashed, N. Yoshinaga, M. Toyoda, and A. Hirata
Vaccines 10 ( 11 ) 1820 2022.10
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)
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COVID-19 forecasting using new viral variants and vaccination effectiveness models Reviewed
E. A. Rashed, S. Kodera, A. Hirata
Computers in Biology and Medicine 149 105986 2022.08
Language：English Publishing type：Research paper (scientific journal)
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Computation of absorbed power densities in high-resolution head models by considering skin thickness in quasi-millimeter and millimeter wave bands Reviewed
K. Taguchi, S. Kodera, T. Kashiwa, and A. Hirata
IEEE Journal of Electromagnetics, RF, and Microwaves in Medicine and Biology 2022.08
Language：English Publishing type：Research paper (scientific journal)
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Did the Tokyo Olympic Games enhance the transmission of COVID-19? -Interpretation with machine learning- Reviewed International coauthorship
A. Hirata, S. Kodera, Y. Diao, and E. A. Rashed
Computers in Biology and Medicine 146 105548 2022.05
Language：English Publishing type：Research paper (scientific journal)
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次世代通信システムからの人体防護のための数値的評価 Invited Reviewed
小寺紗千子, 田口健治, 佐々木謙介
電子情報通信学会論文誌C J105-C 132 - 138 2022.05
Authorship：Lead author, Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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Computed and measured core temperature of patients with heatstroke transported from their homes via ambulance Reviewed
Akito Takada, S. Kodera, H. Togo, M. Shimizu, H. Niwa, T. Ishikura, H. Tanaka, T. Kawahara, and A. Hirata
IEEE Acccess 10 41839 - 41851 2022.04
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)
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Estimation of real-world vaccination effectiveness of mRNA COVID-19 vaccines against delta and omicron variants in Japan Reviewed
S. Kodera, E. A. Rashed, A. Hirata
vaccines 10 ( 3 ) 430 2022.03
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)
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Power absorption and skin temperature rise from simultaneous near-field exposure at 2 and 28 GHz Reviewed International coauthorship
N. Miura, S. Kodera, Y. Diao, J. Higashiyama, Y. Suzuki, and A. Hirata
IEEE Acccess 9 152140 - 152149 2021.11
Language：English Publishing type：Research paper (scientific journal)
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Intercomparison of calculated incident power density and temperature rise for exposure from different antennas at 10–90 GHz Reviewed International coauthorship
K. Li, Y. Diao, K. Sasaki, A. Prokop, D. Poljak, V. Doric, J. Xi, S. Kodera, A. Hirata, and W. El Hajj
IEEE Acccess 9 151654 - 151666 2021.11
Language：English Publishing type：Research paper (scientific journal)
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Social implementation and intervention with estimated morbidity of heat-related illnesses from weather data: A case study from Nagoya City, Japan Reviewed
Sustainable Cities and Society 74 103203 2021.11
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)
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Body core temperature estimation using new compartment model with vital data from wearable devices Reviewed
A. Hirata, T. Miyazawa, R. Uematsu, S. Kodera, Y. Hashimoto, K. Takagahara, Y. Higuchi, H. Togo, T. Kawahara, H. Tanaka
IEEE Acccess 9 124452 - 124462 2021.09
Language：English Publishing type：Research paper (scientific journal)
