Papers - KODERA Sachiko
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Effect of incidence angle on the incident power density definition to correlate skin temperature rise for millimeter wave exposures Reviewed International coauthorship
Y. Diao, K. Li, K. Sasaki, S. Kodera, I. Laakso, W. E. Hajj, and A. Hirata
IEEE Transactions on Electromagnetic Compatibility 63 ( 5 ) 1709 - 1716 2021.08
Language：English Publishing type：Research paper (scientific journal)
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Influence of population density, temperature, and absolute humidity on spread and decay durations of COVID-19: A comparative study of scenarios in China, England, Germany, and Japan Reviewed International coauthorship
Y. Diao, S. Kodera, D. Anzai, J. Gomez-Tames, E. A. Rashed, and A. Hirata
One Health 12 100203 2021.06
Language：English Publishing type：Research paper (scientific journal)
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Human exposure to radiofrequency energy above 6 GHz: review of computational dosimetry studies Invited Reviewed
A. Hirata, S. Kodera, K. Sasaki, J. Gomez-Tames, I. Laakso, A. Wood, S. Watanabe, K. R. Foster
Physics in Medicine & Biology 66 08TR01 2021.04
Language：English Publishing type：Research paper (scientific journal)
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Knowledge discovery from emergency ambulance dispatch during COVID-19: A case study of Nagoya City, Japan Reviewed International coauthorship
E. A. Rashed, S. Kodera, H. Shirakami, R. Kawaguchi, K. Watanabe, and A. Hirata
Jounal of Biomedical Informatics 117 103743 - 103743 2021.03
Language：English Publishing type：Research paper (scientific journal)
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Effect of a lens protein in low-temperature culture of novel immortalized human lens epithelial cells (iHLEC-NY2) Reviewed
N. Yamamoto, S. Takeda, N. Hatsusaka, N. Hiramatsu, N. Nagai, S. Deguchi, Y. Nakazawa, T. Takata, S. Kodera, A. Hirata, E. Kubo, and H. Sasaki
cells 9 2970 2020.12
Language：English Publishing type：Research paper (scientific journal)
DOI： 10.3390/cells9122670
DOI： 10.3390/cells9122670
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Evaluation of SAR and temperature rise in human hand due to contact current from 100 kHz to 100 MHz Reviewed International coauthorship
T. Murakawa, Y. Diao, E. A. Rashed, S. Kodera, Y. Tanaka, Y. Kamimura, S. Kitamura, S. Uehara, Y. Otaka, A. Hirata
IEEE Acccess 200995 - 201004 2020.11
Language：English Publishing type：Research paper (scientific journal)
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A. Hirata, S. Kodera Invited Reviewed
Difference of ICNIRP guidelines and IEEE C95. 1 standard for human protection from radio-frequency exposures
2020 International Symposium on Electromagnetic Compatibility-EMC EUROPE 2020.09
Language：English Publishing type：Research paper (international conference proceedings)
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Correlation between estimated thermoregulatory responses and pacing in athletes during marathon Reviewed International coauthorship
S. Kodera, T. Kamiya, T. Miyazawa, A. Hirata
IEEE Acccess 173079 - 173091 2020.09
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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Model-based approach for analyzing prevalence of nuclear cataracts in elderly residents Reviewed International coauthorship
S. Kodera, A. Hirata, F. Miura, E. A. Rashed, N. Hatsusaka, N. Yamamoto, E. Kubo, and H. Sasaki
Computers in Biology and Medicine 126 104009 2020.09
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)
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Correlation between COVID-19 morbidity and mortality rates in Japan and local population density, temperature, and absolute humidity Reviewed
S. Kodera, E. A. Rashed, and A. Hirata
International Journal of Environmental Research and Public Health 17 5477 2020.07
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)
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Influence of absolute humidity and population density on COVID-19 spread and decay durations: Multi-prefecture study in Japan Reviewed
E. A. Rashed, S. Kodera, J. Gomez-Tames, and A. Hirata
International Journal of Environmental Research and Public Health 17 5354 2020.07
Language：English Publishing type：Research paper (scientific journal)
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Estimation of time-course core temperature and water loss in realistic adult and child models with urban micrometeorology prediction Reviewed
T. Kamiya, R. Onishi, S. Kodera, and A. Hirata
International Journal of Environmental Research and Public Health 16 5097 2019.12
Language：English Publishing type：Research paper (scientific journal)
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Estimation of heat-related morbidity from weather data: A computational study in three prefectures of Japan over 2013–2018 Reviewed
S. Kodera, T. Nishimura, E. Rashed, K. Hasegawa, I. Takeuchi, R. Egawa, H. Sasaki, and A. Hirata
Environment International 130 104907 2019.09
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)
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Permissible SA and Radiant Exposure for Brief Exposure in GHz Region
Sachiko Kodera, Akimasa Hirata
EMC Europe 2019 - 2019 International Symposium on Electromagnetic Compatibility 1020 - 1024 2019.09
Language：English Publishing type：Research paper (international conference proceedings) Publisher：Institute of Electrical and Electronics Engineers Inc.
The specific absorption rate (SAR) averaged over 10 g of tissue is used as a physical quantity to prevent local temperature elevation in the international guidelines for constant exposure to radio-frequency electromagnetic fields. The averaging time of SAR is set to 6 min for local exposure. The ICNIRP public consultation document introduced a new physical quantity, absorbed power density (APD), as the basic restriction above 6 GHz. In addition, the limit for the specific absorption (SA) and absorbed energy density (AED) were set to avoid heating for brief exposures (shorter than the averaging time of 6 min). If all the energy for the averaging time of 6 min for continuous wave are concentrated into short duration and multiple pulse exposures, the local temperature elevation for the pulse(s) may exceeds that of exposure at almost constant exposure although it satisfies the limit for the SAR/APD. The purpose of this study is to determine how best to set the metric in order to limit temperature rise from brief exposures. We first confirmed that the peak temperature elevation for brief pulse exceeds the steady-state temperature for continuous exposure. We then proposed the limit energy density from the regression curve depending on the exposure duration of brief-pulse(s). The time course of temperature elevation in the multi-layer cube model was computed for typical scenarios of multiple pulses exposures. The SA and AED based on the regression curve can be used as a metric to prevent excess temperature elevation for different brief exposure scenario.
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5G communications systems and radiofrequency exposure limits Invited International coauthorship
K. R. Foster, S. Kodera, and A. Hirata
IEEE Future Networks Tech Focus 3 ( 2 ) 2019.09
Language：English Publishing type：Research paper (scientific journal)
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Different thermoregulatory responses of people from tropical and temperate zones: A computational study Reviewed
T. Kamiya, S. Kodera, K. Hasegawa, R. Egawa, H. Sasaki, and A. Hirata
Building and Environment 159 106152 2019.07
Language：English Publishing type：Research paper (scientific journal)
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Setting exposure guidelines and product safety standards for radio-frequency exposure at frequencies above 6 GHz: brief review Invited Reviewed
A. Hirata, D. Funahashi, and S. Kodera
Annals of Telecommunications 74 17 - 24 2019.01
Language：English Publishing type：Research paper (scientific journal)
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Area-averaged transmitted power density at skin surface as metric to estimate surface temperature elevation Reviewed International coauthorship
D. Funahashi, A. Hirata, S. Kodera, and K. R. Foster
IEEE Acccess 6 77665 - 77674 2018.11
Language：English Publishing type：Research paper (scientific journal)
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Temperature rise for brief radio-frequency exposure below 6 GHz Reviewed International coauthorship
S. Kodera, A. Hirata, D. Funahashi, S. Watanabe, K. Jokela, and R. J. Croft
IEEE Acccess 6 65737 - 65746 2018.10
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)
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Comparison of thermal response for RF exposure in human and rat models Reviewed
S. Kodera and A. Hirata
International Journal of Environmental Research and Public Health 15 ( 10 ) 2320 2018.10
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
