Takeo Shiina

Takeo Shiina
Central Research Institute of Electric Power Industry | CRIEPI · Electric Power Engineering Research Laboratory

About

14
Publications
2,182
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
80
Citations
Citations since 2017
8 Research Items
77 Citations
201720182019202020212022202305101520
201720182019202020212022202305101520
201720182019202020212022202305101520
201720182019202020212022202305101520

Publications

Publications (14)
Article
Worker exposure to high-intensity magnetic fields encountered during bare-handed live-line working on a conductor of an overhead transmission line is a major safety concern. In this article, internal ( in situ ) electric fields in a live-line worker induced by power frequency magnetic fields were numerically calculated considering realistic exposu...
Article
Objects or human bodies under DC overhead transmission lines may be charged with ion flow due to corona discharge generated on the surface of charged conductors. Ion flow electrification is an important considerations in the construction and operation of DC overhead transmission lines, and the charged voltage due to ion flow is the item that determ...
Article
Conductive objects insulated from the ground under DC transmission lines are electrified by the flow of ions supplied by corona discharge on the surface of the line conductor. The charge voltage of a human body as a result of the ion flow is an important factor in designing DC transmission lines. An insulated wire is also electrified at the outer s...
Article
We assessed human exposure to radiofrequency (RF) electromagnetic fields used for a wireless communication system installed on a smart meter for communication in the 920 MHz band. In an exposure guideline, the specific absorption rate (SAR) is used as a measure of the thermal effects of human exposure to electromagnetic fields. Although the low‐pow...
Article
We assessed human exposure to radiofrequency (RF) electromagnetic fields used for a wireless communication system installed on a smart meter for communication in the 920 MHz band. In an exposure guideline, the specific absorption rate (SAR) is used as a measure of the thermal effects of human exposure to electromagnetic fields. Although the low-pow...
Article
Full-text available
Millimeter waves are used in various fields, and the risks of this wavelength range for human health must be carefully evaluated. In this study, we investigated the effects of millimeter waves on genotoxicity and heat shock protein expression in human corneal epithelial (HCE-T) and human lens epithelial (SRA01/04) cells. We exposed the cells to 40-...
Article
Full-text available
Although the likelihood of exposure to leaking intermediate frequency magnetic fields (MFs) from electronic devices, such as induction‐heating and wireless power transfer systems, has increased, biological data assessing the health risks associated with human exposure remain insufficient. We examined the carcinogenicity of a 20 kHz MF, a typical fr...
Article
Full-text available
Human corneal epithelial (HCE-T) and human lens epithelial (SRA01/04) cells derived from the human eye were exposed to 60 gigahertz (GHz) millimeter-wavelength radiation for 24 h. There was no statistically significant increase in the micronucleus (MN) frequency in cells exposed to 60 GHz millimeter-wavelength radiation at 1 mW/cm² compared with sh...
Article
Full-text available
To investigate the cellular effects of terahertz (THz) exposure, human corneal epithelial (HCE-T) cells derived from human eye were exposed to 0.12 THz radiation at 5 mW/cm² for 24 h, then the genotoxicity, morphological changes, and heat shock protein (Hsp) expression of the cells were examined. There was no statistically significant increase in t...
Article
The purpose of this study is to develop a novel in vitro millimeter-wave (MMW) applicator for an exposure apparatus that allows high power efficiency with reasonably good homogeneity over a sufficient exposure area, as well as the capability of temperature control in biological samples. The applicator is made of a printed circuit board and has a la...
Article
We investigated the effects of millimeter-wave (MMW) electromagnetic fields on neurite outgrowth in PC12VG cells in vitro. We examined the average length of neurites of 160 cells exposed or sham-exposed to 60 GHz MMWs with circular and linear polarizations at average power density of 1 mW/cm2 for two-times of 24 hour exposure. Four parameters, name...
Conference Paper
Two kinds of cells (HCE-T and SRA) derived from human eye were exposed to a millimeter-wave for 24 hours. The micronucleus (MN) frequency of cells treated with bleomycin for 1 hour was high enough as a positive control. However there is no statistically significant increase in the MN frequencies of the cells exposed to 60 GHz millimeter-wave at 1 m...
Conference Paper
We analyzed temperature increase in the post-wall waveguide type millimeter-wave exposure apparatus in vitro. This results show a similar tendency to the experimental results. The cooling effect in a state of natural cooling was 35-55 % by using heat sink as a basic cooling element. It allows the evaluations for non-thermal effects to expose MMWs o...

Network

Cited By