Updated on 2024/12/23

写真a

 
YAMAKAWA Junji
 
Organization
Faculty of Environmental, Life, Natural Science and Technology Assistant Professor
Position
Assistant Professor
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Degree

  • Doctor (Science) ( Okayama University )

Research Interests

  • 地理情報システム

  • 鉱物学

  • Geostatistics

  • GIS

  • Mineral science

  • 地球統計学

Research Areas

  • Natural Science / Solid earth sciences

  • Humanities & Social Sciences / Geography

  • Environmental Science/Agriculture Science / Environmental dynamic analysis

Education

  • Okayama University   自然科学研究科   物質基礎科学

    1991.4 - 1994

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    Country: Japan

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  • Okayama University   理学研究科   地球科学

    1989.4 - 1991.3

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  • Okayama University   理学部   地球科学科

    1985.4 - 1989.3

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    Country: Japan

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Research History

  • Faculty of Natural Science and Technology, Okayama University   Assistant Professor

    2021.4

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  • Graduate School of Natural Science and Technology, Okayama University   Assistant Professor

    2007.4 - 2021.3

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  • Graduate School of Natural Science and Technology, Okayama University   Assistant

    2005.4 - 2007.3

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  • - Assistant Professor,Graduate School of Natural Science and Technology,Okayama University

    2004

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  • - 岡山大学自然科学研究科 助教

    2004

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Professional Memberships

  • Japan society of Geoinformatics

    2018.10

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  • International Association for Mathematical Geology

    2018.4

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  • Japan Associasion of Mineralogical Sciences

    1994.4

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Papers

  • Analysis of online lectures by using Attendance efficiency and Lecture efficiency -An attempt to estimate the optimal online lecture duration-

    Junji YAMAKAWA

    Bulletin of Center for Teacher Education and Development, Okayama University   12 ( 1 )   1 - 6   2023.3

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    Authorship:Lead author   Language:Japanese  

    DOI: 10.18926/CTED/65060

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  • An Investigation on “Ae” of Real-time Online Lecture at the Okayama university - Using the YouTube Live + OBS Studio and Google Classroom Web Applications

    Junji YAMAKAWA, Hiroshi TAKAHAATA

    Bulletin of Center for Teacher Education and Development, Okayama University   12   33 - 46   2022.3

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    Authorship:Lead author   Language:Japanese  

    DOI: 10.18926/cted/63296

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  • Un Monophosphate Synthetique de Sodium et de Cobalt : Na4Co7(PO4)6

    Dilshat Kobashi, Shizuo Kohara, Junji Yamakawa, Akira Kawahara

    Acta Crystallographica   C54   7 - 9   1998

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  • Long-term exposure to fine particulate matter and natural-cause and cause-specific mortality in Japan

    Takashi Yorifuji, Saori Kashima, Yasunari Tani, Junji Yamakawa, Hiroyuki Doi

    Environmental Epidemiology   3 ( 3 )   e051 - e051   2019.5

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    Publishing type:Research paper (scientific journal)   Publisher:Ovid Technologies (Wolters Kluwer Health)  

    DOI: 10.1097/ee9.0000000000000051

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  • Google classroom and Chromebook as an Educational IT system

    Junji YAMAKAWA, Hiroshi TAKAHATA

    Bulletin of Center for Teacher Education and Development, Okayama University   9 ( 1 )   1 - 12   2019.3

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    Authorship:Lead author   Language:Japanese  

    DOI: 10.18926/CTED/56536

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Books

  • Chemistry in the Elementary course of the College

    Masaya KAWASE, Junji YAMAKAWA( Role: Joint author)

    Kagaku Dojin  2012 

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  • LaTeX by examples

    Makoto HIRAMATSU, Yasushi MATSUSHIMA, Junji YAMAKWA( Role: Joint author)

    Baifu kan  1995  ( ISBN:4563013811

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MISC

  • ある鉱物学者の新・誕生石図鑑(16)ジルコン

    山川純次

    月刊化学   78 ( 12 )   2023.12

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    Authorship:Lead author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

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  • ある鉱物学者の新・誕生石図鑑(15)タンザナイト

    山川純次

    月刊化学   78 ( 11 )   2023.11

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    Authorship:Lead author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

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  • ある鉱物学者の新・誕生石図鑑(14)真珠

    山川純次

    月刊化学   78 ( 10 )   55 - 55   2023.10

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    Authorship:Lead author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

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  • ある鉱物学者の新・誕生石図鑑(13)メノウ

    山川純次

    月刊化学   78 ( 9 )   36 - 36   2023.9

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    Authorship:Lead author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

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  • ある鉱物学者の新・誕生石図鑑(12)スピネル

    山川純次

    月刊化学   78 ( 8 )   50 - 50   2023.8

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    Authorship:Lead author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

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Presentations

  • Estimation of lost terrain by machine learning method

    Junji YAMAKAWA

    2024.12.8 

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    Event date: 2024.12.8

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • Terrain Analysis of Handayama Using DEM Modeling by Machine Learning

    Jun Nishimura, Junji Yamakawa

    Japan Geoscience Union Meeting 2024. 2024/05/26-2024/05/31  2024.5.29 

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    Event date: 2024.5.26 - 2024.5.31

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • Geoinformatics analysis of wind in Kobe city area using R and GIS Invited

    Junji YAMAKAWA

    Japan Geoscience Union Meeting 2023  2023.5.24 

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    Event date: 2023.5.21 - 2023.5.26

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

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  • Cu-analogue of borcarite from the Fuka mine, Takahashi, Okayama Prefecture, Japan

    Ohnishi Masayuki, Kusachi Isao, Kobayashi Shoichi, Yamakawa Junji, Tanabe Mitsuo, Kishi Shigetomo, Yasuda Takashi

    Abstracts for Annual Meeting of the Mineralogical Society of Japan  2005  Japan Association of Mineralogical Sciences

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    Event date: 2005

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  • Geoinformatics analysis by AI and Spatial Statistics

    Junji YAMAKAWA

    2023.12.16 

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    Language:Japanese   Presentation type:Oral presentation (general)  

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Works

  • 岡山大学知恵の見本市2017

    2017

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  • 岡山大学知恵の見本市2016

    2016

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  • 岡山大学知恵の見本市2015

    2015

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  • 岡山大学知恵の見本市2014

    2014

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  • 岡山大学知恵の見本市2013

    2013

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Research Projects

  • Analysis of the contents of hydrogen and carbon in skarn minerals

    Grant number:06453004  1994 - 1996

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    HENMI Chiyoko, YAMAKAWA Junji, KUSACHI Isao, KAWAHARA Akira

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    Grant amount:\7500000 ( Direct expense: \7500000 )

    A CHNS elemental analyzer is usually used to analyze the chemical composition of organic materials, we attempted to analyze the contents of carbon, hydrogen, nitrogen and sulfur in minerals using an elemental analyzer which needs only small amounts of samples.
    To determine the precision of the analitical results and the effective method of the use of the instrument, we analyzed organic and inorganic standard reagents. Mineral standars, subsequently, were analyzed to determine the combustion temperatures, the amounts of samples relating to the contents and the influence of coexisting other elements in minerals. Skarn minerals were analyzed under the suitable conditions determined from the above data. The results are as follows.
    1.The contents of hydrogen and carbon measured by the use of an elemental analyzer agree well with those measured by a Karl-Fischer Moisture meter for the same mineral samples.
    2.The water contents in minerals measured by the use of an elemental analyzer are close to those determined from data of ignition loss or thermal analysis and are consistent with the theoretical values.
    3.Because the amounts of samples required for the measurment by an elemental analyzer are less than those by wet-chemical analyzes, the water contents of some minerals were able to be analyzed.
    4.The use of both EPMA and an elemental analyzer determined the chemical compositions and the chemical formurae of some minerals.
    5.When a mineral not contain hydrogen and/or carbon and is mixed with known other minerals containing hydrogen and/or carbon, the contents of hydrogen and carobon in the mixture give the chemical composition of the mineral.

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Class subject in charge

  • Seminar on Geoinformatics (2024academic year) Other  - その他

  • Seminar on Geoinformatics (2024academic year) Year-round  - その他

  • Directed Reading in Earth Science 3 (2024academic year) 1st semester  - 水1~2

  • Directed Reading in Earth Science 8 (2024academic year) Second semester  - 木1~2

  • Gateway to Earth Science (2024academic year) 1st semester  - 火5~6

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