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QUALIFICATION OF ELF MAGNETIC FIELD ENVIRONMENT FOR HEALTH RISK EVALUATION BY ELF MAGNETIC FIELD

Research Project

Project/Area Number 09650322
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 電力工学・電気機器工学
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

HAYASHI Noriyuki  KYUSHU UNIVERSITY,INTER-DISCIPLINARY GRADUATE SCHOOL OF ENGINEERING SCIENCES,ASSOCIATE PROFESSOR, 大学院・総合理工学研究科, 助教授 (30156450)

Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 1998: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1997: ¥1,700,000 (Direct Cost: ¥1,700,000)
KeywordsELF / MAGNETIC FIELD / INDUCTION CURRENT / BIO-EFFECT / BIO-IMPEDANCE / TISSUE / MEMBARNE / PHASE DIFFERENCE
Research Abstract

Basic characteristics of induced current in bio-materials exposed to ELF magnetic and electric fields are successfully investigated in order to provide preliminary data that will be useful to design the measuring system of environmental magnetic field.
The following results are obtained.
(1) Semi-theoretical expression to estimate the induced current distribution in eccentric double-layered spherical model is proposed.
(2) Conventional "impedance method" is successfully modified to improve the numerical precision by introducing new boundary condition on the continuity of current density at boundary Area.
(3) Two numerical procedure mentioned above are applied to estimate the magnetically induced current distribution under various geometrical and environmental conditions, and their characteristics are discussed.
(4) It is pointed out that the existence of tissue membranes should be taken into account for the precise discussion of induced current.
(5) Resultant induced current attributed to the magnetic and electrical induction caused by simultaneous exposure to magnetic and electric fields.
Those results mention above will offer useful data to design the measuring system of environmental magnetic field as a next stage of the research project.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (29 results)

All Other

All Publications (29 results)

  • [Publications] Noriyuki Hayashi: "Semi-Theoretical Expression of the ELF-Magnetically Induced Current to an Eccentric Double-Laver Biological Sphere" Proc. 1997 Japan-Korea Joint Symp. ED and HVE. 173-176 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Takashi Matsumoto: "Quantification of Interaction between 2-Dimensional Low Frequency Magnetic Fields and Spherical Model of Biological Object" Proc. 10th Int'l Symp. ISH. 6. 1-4 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Hiroo Tarao: "Improved Impedance Method for the Calculation of Electric Fields Induced in Simple Biological Structures by ELF Magnetic Fields" Proc. 10th Int'l Symp. ISH. 6. 77-80 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 松本高志: "2次元低周波磁界と球状生体モデルのカップリング現象の定量化" 電子情報通信学会誌. J81-B-II. 92-100 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 太良尾浩生: "ELF磁界による2媒質偏心生体モデル内の誘導電界分布特性の解析" 電気学会論文誌A, Vol.,No.5(平10.5). 118-A. 475-482 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] N. Hayashi: "Theoretical Analysis of Electric Field Induced in Bio-Material Exposed to Two Dimensional ELF Magnetic Field" Proc. 1998 Korea-Japan Joint Symp. on ED and HVE. 173-176 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] N. Hayashi: "Effect of Membrane Conductivity on Current Distribution Induced in Bio-Material by Ambient ELF Magnetic Field" Proc. 9-th ACED. D1-3 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] H. Tarao: "Effect of Membrane on Current Distribution in Biological Sphere Tissue with A Membrane Placed in Uniform and Eddy Current Fields" Proc. EMC‘99. (in press). (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T.Matsumoto: "Analysis of Induced Current Density in Spherical Conductive Model Exposed Simultaneously to Extremely Low Frequency Electric and Magnetic Fields" Proc. EMC‘99. (in press). (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Noriyuki HAYASHI: "Semi-Theoretical Expression of the ELF-Magnetically Induced Current to an Eccentric Double-Layer Biological Sphere" Proc.1997 Japan-Korea Joint Symp.ED and HVE. 173-176 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Takashi MATSUMOTO: "Quantification of Interac-tion between 2-Dimensional Low Frequency Mag-netic Fields and Spherical Model of Biological Ob-ject" Proc.10th Int'l Symp.ISH. 1-4 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Hiroo TARAO: "Improved Impedance Method for the Calculation of Electric Fields Induced in Simple Biological Structures by ELF Magnetic Fields" Proc.10th Int'l Symp.ISH. 77-80 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Takashi MATSUMOTO: "Quantification of Coupling between 2-Dimensional Low Frequency Magnetic Fields and Spherical Model of Biological Substance" Trans.IEICE,J81-B-II. No.1. 92-100 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Hiroo TARAO: "Characterization of Electric Fields Induced by ELF Magnetic Fields in Biological Model of Eccentric Double-Layered Sphere" Trans.IEE of JAPAN. 118-A,No.5. 475-482 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Noriyuki HAYASHI: "Theoretical Analysis of Electric Field Induced in Bio-Material Exposed to Two Di-mensional ELF Magnetic Field" Proc.1998 Korea-Japan Joint Symp.on ED and HVE. 173-176 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Noriyuki HAYASHI: "Effect of Membrane Conduc-tivity on Current Distribution Induced in Bio-Material by Ambient ELF Magnetic Field" Proc.9-th ACED. D1-3. (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Hiroo TARAO: "Effect of Membrane on Current Dis-tribution in Biological Sphere Tissue with A Mem-brane Placed in Uniform and Eddy Current Fields" Proc.EMC'99. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Takashi MATSUMOTO: "Analysis of Induced Cur-rent Density in Spherical Conductive Model Ex-posed Simultaneously to Extremely Low Frequency Electric and Magnetic Fields" Proc.EMC'99. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 松本高志: "2次元低周波磁界と球状生体モデルのカップリング現象の定量化" 電子情報通信学会誌. J81-B-II. 92-100 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 太良尾浩生: "ELF磁界による2媒質偏心生体モデル内の誘導電界分布特性の解析" 電気学会論文誌A,Vol.,No.5(平10.5). 118-A. 475-482 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] N. Hayashi: "Theoretical Analysis of Electric Field Induced in Bio-Material Exposed to Two Dimensional ELF Magnetic Field" Proc. 1998 Korea-Japan Joint Symp. on ED and HVE. 173-176 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] N. Hayashi: "Effect of Mambrane on Current Distribution in Biological Sphere Tissue with A Membrane Placed in Uniform and Eddv Current Fields" Proc. 9-th ACED. D1-3 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] H. Tarao: "Effect of Membrane on Current Distribution in Biological Sphere Tissue with A Membrane Placed in Uniform and Eddv Current Fields" Proc. EMC'99. (in press). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] T. Matsumoto: "Analysis of Induced Current Density in Spherical Conductive Model Exposed Simultaneously to Extremely Low Frequency Electric and Magnetic Fields" Proc. EMC'99. (in press). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] Noriyuki Hayashi: "Semi-Theoretical Expression of the ELF-Magnetically Induced Current to an Eccentric Double-Layer Biological Sphere" Proc.1997 Japan-Korea Joint Symp.ED and HVE. 173-176 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Takashi Matsumoto: "Quantification of Interaction between 2-Dimensional Low Frequency Magnetic Fields and Spherical Model of Biological Object" Proc.10th Int'l Symp.ISH. 6. 1-4 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Hiroo Tarao: "Improved Impedance Method for the Calculation of Electric Fields Induced in Simple Biological Structures by ELF Magnetic Fields" Proc.10th Int'l Symp.ISH. 6. 77-80 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 太良尾浩生: "ELF磁界による2媒質偏心生体モデル内の誘導電界分布特性の解析" 電気学会論文誌A. 118-A(in press). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 松本高志: "2次元低周波磁界と球状生体モデルのカップリング現象の定量化" 電子情報通信学会論文誌. J81-B-II. 92-100 (1998)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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