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Faculty of Education Technical training |
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YUJI Toshifumi
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Degree 【 display / non-display 】
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博士（工学） ( 2007.3 東京工業大学 )
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修士（工学） ( 2003.3 宮崎大学 )
Research Areas 【 display / non-display 】
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Energy Engineering / Fundamental plasma
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Humanities & Social Sciences / Education on school subjects and primary/secondary education / エネルギー教育
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Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Power engineering
Papers 【 display / non-display 】
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Poonthong W., Yuji T., Suzaki Y., Oya Y., Mungkung N., Kasayapanand N.
Vacuum 250 2026.7
Publishing type：Research paper (scientific journal) Publisher：Vacuum
AbstractThe work on implementing an alternative ZnO thin-film fabrication method is of paramount importance for conducting a thorough analysis of the potential impact of plasma deposition processing. This work presents an innovative low-pressure high-frequency PECVD approach for ZnO thin films, which was synthesized using a Zn micro powder + Ar mixture gas on Si(100) substrates. The deposition was carried out under controlled plasma treatment times ranging from 10 to 60 min, enabling a systematic evaluation of growth dynamics. In order to characterize the thin film properties, structural and morphological analyses were performed using XRD, FE-SEM, and XPS, which collectively confirmed the successful formation of crystalline ZnO films. As a result, the Ar plasma effectively promotes ZnO thin film growth, with extended deposition times resulting in enhanced crystallinity. There has been demonstrated that extending the deposition times results in enhanced crystallinity, which improves surface homogeneity and yields superior film quality. Furthermore, the method illustrates the feasibility of the Zn micro powder as a precursor, thereby reducing costs and minimizing environmental impact. Finally, the method route presents a practice and technologically significant pathway for integrating high-quality ZnO thin films into advanced semiconductor applications, especially as a transparent conductive electrode in optoelectronic devices.
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Suggestion of Nondestructive Testing Technique on Power Transmission Tower Using Acoustic Emission Sensor Reviewed
Yuji Toshifumi, Wittawat Poonthong, Bouno Toshio, Kamata Noritsugu
The Transactions of the Institute of Electrical Installation Engineers of Japan 46 ( 1 ) 1 - 2 2026
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Institute of Electrical Installation Engineers of Japan
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湯地 敏史
Materials 18 ( 3 ) 537 2025.2
Language：English Publishing type：Research paper (scientific journal) Publisher：MDPI AG
Excessive spatter formation in conventional CO2 arc welding significantly diminishes welding quality and efficiency, posing a critical challenge for industrial applications. To address this issue, this study investigated the mechanisms of metal transfer behavior and spatter formation under the influence of a longitudinal magnetic field (LMF) using a shadow-graph technique with high-speed imaging and back-laser illumination, also coupled with Computational Fluid Dynamics (CFD)-based arc-droplet numerical simulations. The results show that increasing the magnetic flux density (MFD) from 0 to 2 mT shifted the transfer mode from the repelled transfer to the globular transfer, while higher MFDs (3–4 mT) induced rotating repelled transfer. The globular transfer at 2 mT was considered to be primarily produced by the centrifugal effect due to the rotational motion of the molten metal inside the droplet, which was caused by the Lorentz force affected by LMF. The higher droplet temperature in this condition also contributed to forming this transfer mode, preventing the formation of repelled transfer through a decrease in the arc pressure. On the contrary, in the higher MFDs, the droplet temperature decreased to increase the arc pressure, lifting the droplet up. Furthermore, the very strong centrifugal effect rotated the molten metal column around the wire axis to induce the rotating repelled transfer. The spatter formation was found to occur with the two-stage motion of the curved long tail without LMF and at 4 mT, and also with the exploding molten metal column at 4 mT, due to an imbalance of the Lorentz force acting on the molten metal. On the other hand, the neck formation facilitated smooth droplet detachment without forming the curved long tail at 2 mT, reducing spatter significantly. These findings offer valuable insights for optimizing welding quality and efficiency by stabilizing globular transfer under an optimal LMF.
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Surface Development of Polyethylene Terephthalate Films Using Low-Pressure, High-Frequency Argon + Oxygen Plasma on Zinc Powder for Dye-Sensitized Solar Cells International coauthorship
Poonthong W., Mungkung N., Tunlasakun K., Thungsuk N., Kasayapanand N., Arunrungrusmi S., Tanitteerapan T., Maneepen T., Songruk A., Yuji T.
Polymers 16 ( 16 ) 2024.8
Language：English Publishing type：Research paper (scientific journal) Publisher：Polymers
This research has developed a process for producing ZnO thin film from DEZn deposited onto a PET substrate with low-pressure, high-frequency Ar + O2 plasma using a chemical vapor deposition technique. The aim is to study the film production conditions that affect electrical properties, optical properties, and thin film surfaces. This work highlights the use of plasma energy produced from a mixture of gases between Ar + O2. Plasma production is stimulated by an RF power supply to deliver high chemical energy and push ZnO atoms from the cathode inside the reactor onto the substrate through surface chemical reactions. The results showed that increasing the RF power in plasma production affected the chemical reactions on the substrate surface of film formations. Film preparation at an RF power of 300 W will result in the thickest films. The film has a continuous columnar formation, and the surface has a granular structure. This results in the lowest electrical resistivity of 1.8 × 10−4 Ω. In addition, when fabricated into a DSSC device, the device tested the PCE value and showed the highest value at 5.68%. The reason is due to the very rough surface nature of the ZnO film, which increases the scattering and storage of sunlight, making cells more efficient. Therefore, the benefit of this research is that it will be a highly efficient prototype of thin film production technology using a chemical process that reduces production costs and can be used in the industrial development of solar cells.
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An investigation on plasma-MIG hybrid welding process of thick plate aluminum Reviewed International coauthorship
Yuji T., Tashiro S., Kinoshita H., Yasui K., Bouno T., Ziang W., Dongsheng W., Poonthong W., Rahman S.A.A., Mamat S.B., Tanaka M.
Journal of Advanced Joining Processes 9 2024.6
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Advanced Joining Processes
Plasma-Metal Inert Gas (MIG) hybrid welding was employed to carry out bead on plate welding of an aluminum alloy A5052. The plasma arc was ignited to form a keyhole, and a series of welding systems were developed starting with MIG welding. The convective patterns within the weld pool were meticulously analyzed. In addition, we conducted experimental observations of the flow inside and on the surface of the pool, and we were able to visualize the flow in some areas. The results indicated that the plasma welding side formed a pool that seamlessly integrated the plasma side and the MIG side. At the same time, we observed the formation of a flow pool that integrates both plasma and MIG sides, affecting the formation and behavior of the weld pool. This study aims to provide a nuanced understanding of flow dynamics across the entire pool. This approach is geared towards refining the intricacies of weld pool dynamics for the advancement of welding technologies.
Books 【 display / non-display 】
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STEAMで探求するエネルギー環境教育
大矢恭久, 栢野彰秀, 濱田栄作, 湯地敏史 編著（ Role： Joint author）
パブファンセルフ 2025.11 （ ISBN:4824610249 ）
Total pages： 138 Language：Japanese Book type：Scholarly book
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中学校技術・家庭『技術分野』教科書
竹野英敏【編著】 （ Role： Joint editor）
開隆堂出版 2023.3
Language：Japanese Book type：Textbook, survey, introduction
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技術科教員指導能力認定試験・中学校技術科教員採用試験 ー技術科教員を目指す方へー 2021年度参考書
技術科教員指導能力認定試験事務局 編著（ Role： Contributor）
技術科教員指導能力認定試験事務局 2021.5
Total pages：274 Language：Japanese Book type：General book, introductory book for general audience
本書は，技術科教員指導能力認定試験の問題だけでなく， 各地の技術科教員採用試験の問題も参考に，各分野で問題 や解答とともに解説を掲載しております。
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技術分野 技術・家庭 学習指導書 指導計画・評価編
監修 安東茂樹 ※分担（ Role： Joint author）
開隆堂出版 2021.5
Language：Japanese Book type：Textbook, survey, introduction
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中学校技術・家庭『技術分野』教科書
竹野英敏【編著】 （ Role： Joint editor）
開隆堂出版 2021.3
Language：Japanese Book type：Textbook, survey, introduction
MISC 【 display / non-display 】
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Current Situations and Issues in Evaluation Methods as Seen from a Fact-finding Survey on Teaching in Life Environment Studies
Yuji Toshifumi
32 89 - 101 2024.3
Authorship：Last author Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution)
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「関わる力」育成に向けた中学生の木育活動 －木玉人形作りを通した幼稚園児との交流学習－
藤元 嘉安 , 湯地 敏史 , 野崎 俊輝 , 河野 哲志 , 土屋 貴代
宮崎大学教育学部紀要 95 1 - 9 2020.8
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution) Publisher：宮崎大学教育学部
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幼小連携における接続期カリキュラムの設計
間瀬田 恵美, 福島 裕子, 鎌田 麻里, 三藤 三穂子, 甲斐 かおり, 湯地 敏史
宮崎大学教育学部附属教育協働開発センター研究紀要 29 107 - 116 2020.3
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution) Publisher：宮崎大学教育学部附属教育協働開発センター
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Disaster-preparedness Map Made by Kindergartener and Guardian in Universityattached Kindergarten
28 137 - 149 2020.3
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution)
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テキストマイニングによる高等学校学習指導要領「工業編」の変遷における内容分析 : 工業情報数理において
湯地敏史・房野俊夫
電気学会教育フロンティア研究会資料 FIE 2019(1-14) 5 - 10 2019.3
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal)
Presentations 【 display / non-display 】
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STEAM教育と現行学習指導要領
栢野彰秀, 大矢恭久, 濱田栄作，森健一郎, 湯地敏史
第6回高等学校連携委員会研究会– 離島でのエネルギーと環境調和を見据えて – 2025.10.18
Event date： 2025.10.18 - 2025.10.19
Language：Japanese Presentation type：Oral presentation (general)
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STEAM教育基盤としての『情報Ⅰ』授業実践に向けての研究
鎌田憲嗣，房野俊夫，湯地敏史，山田哲也
第6回高等学校連携委員会研究会– 離島でのエネルギーと環境調和を見据えて – 2025.10.18
Event date： 2025.10.18 - 2025.10.19
Language：Japanese Presentation type：Oral presentation (general)
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小・中・高現職教員に対するエネルギー環境教育の実施のための教員研究会の企画について International coauthorship
湯地敏史, 大矢恭久, 栢野彰秀, 濱田栄作, 森健一郎, 中島宏
第6回高等学校連携委員会研究会– 離島でのエネルギーと環境調和を見据えて – 2025.10.18
Event date： 2025.10.18 - 2025.10.19
Language：Japanese Presentation type：Oral presentation (general)
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移動可能な学び舎:災害時船舶学習環境の有効性と展望
大島悠暉, 海野烈央, 増岡直路, 山口尚哉, 湯地敏史, 佐々木克敬, 髙橋洋子, 廣野康平, 尾崎高司, 藤本昌志
令和7年度日本教育大学協会研究集会 発表概要集 2025.9.27
Event date： 2025.9.27
Language：Japanese Presentation type：Oral presentation (general)
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災害時を想定した船舶を用いたモデル授業 －M-GTA を用いた分析報告－
佐々木 克敬, 山口 尚哉. 湯地 敏史, 髙橋 洋子
日本安全教育学会第26回岩手大会プログラム・予稿集. 2025 2025.9.13
Event date： 2025.9.13 - 2025.9.14
Language：Japanese Presentation type：Oral presentation (general)
Works 【 display / non-display 】
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知育システム ユメクリ
2019.5.17
Work type：Educational material
Awards 【 display / non-display 】
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第36回電気設備学会賞 学術部門 論文奨励賞
2025.6 社団法人電気設備学会
湯地敏史，房野俊夫
Award type：Honored in official journal of a scientific society, scientific journal Country：Japan
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令和6年電気設備学会九州支部賞
2024.5 （一社）電気設備学会
湯地敏史、房野俊夫
Award type：International academic award (Japan or overseas) Country：Japan
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Gold Award
2023.9 Asian Student' Capstone Design Contest（ASCC） 2023 Development of 4-blades in micro hydraulic power turbine utilizing water pipeline for electricity crisis from nature disasters
Akihito Minami, Ryotaro Abe and Wittawat Poonthong, Toshio Bouno and Toshifumi Yuji
Award type：Award from international society, conference, symposium, etc.
9月８日(金)-9日(土)、タイ バンコクで開催された「Asian Student’ Capstone Design Contest 2023」「Gold Award」を受賞しました。
”Capstone Design"とは、学生の学びの成果や集大成を作品や論文などにまとめる実践的プロジェクトで、世界各国で取り組まれています。 -
ICSTE(International Conference on Science, Technology and Education) 2022 Best Paper Award
2022.9 ICSTE(International Conference on Science, Technology and Education) committee
T.Yuji, T.Tsuchiya, S.Ikeuchi, C.Shinohara, M.Yamaoka, K.Ueno, T.Yamada and N.Kamata
Award type：Award from international society, conference, symposium, etc. Country：Thailand
With Covid-19 pandemic, the Ministry of Education, Culture, Sports, Science and Technology promoted the online education in schools in Japan after the development of Information and Communication Technology (ICT) education upon demand for closure of all the schools. For this reason, the elementary schools across Japan are almost ready to implement ICT education. In this study, we gave an online class on cancer and medical endoscopes at remote location with such ICT environment developed. The comparison of the survey before/after the class revealed the effect on the understanding of innovative medical endoscope technology in the medical and engineering fields, and the effect of the career education for possible stronger interest among children in medical fields after learning about the medical instrument. Here we would like to report the educational effect of the ICT education through online class we verified.
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令和２年電気設備学会九州支部賞
2020.5 （一社）電気設備学会
湯地敏史・房野俊夫・鎌田憲嗣・西山弘信
Award type：Honored in official journal of a scientific society, scientific journal Country：Japan
Grant-in-Aid for Scientific Research 【 display / non-display 】
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技術科の新たな価値を生み出す力を育成する課題解決型カリキュラムの開発
Grant number：25K06621 2025.04 - 2029.03
独立行政法人日本学術振興会 科学研究費基金 基盤研究(C)
Authorship：Coinvestigator(s)
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PAW-based WAAMにおける酸化膜除去促進等を通じたポロシティ低減化技術の開発
Grant number：25K08344 2025.04 - 2028.03
独立行政法人日本学術振興会 科学研究費基金 基盤研究(C)
Authorship：Coinvestigator(s)
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大気圧プラズマによる光触媒機能性繊維材料の開発
Grant number：24K05549 2024.04 - 2027.03
独立行政法人日本学術振興会 科学研究費基金 基盤研究(C)
Authorship：Principal investigator
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STEAM教育のレリバンス構造とコンピテンシーモデルに基づく学習プログラム開発
Grant number：24K06038 2024.04 - 2027.03
独立行政法人日本学術振興会 科学研究費基金 基盤研究(C)
Authorship：Coinvestigator(s)
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厚鋼板の安定な低入熱1パス溶接のための高性能プラズマミグハイブリッド溶接法の開発
Grant number：21K04710 2021.04 - 2024.03
独立行政法人日本学術振興会 科学研究費補助金 基盤研究(C)
Authorship：Coinvestigator(s)
Available Technology 【 display / non-display 】
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大気圧プラズマを用いた材料表面処理、繊維材料への染色技術の開発
プラズマCVD法を用いた新素材（半導体材料）の開発
プラズマ-MIGハイブリッド溶接技術のの開発Related fields where technical consultation is available：プラズマプロセス、電力機器の開発、プラズマーMIGハイブリッド溶接、TIG溶接
Message：最近、電力機器に関連する本を出版致しました。
送配電の基礎(第2版) 著者名：山口純一/中村格/湯地敏史 森北出版株式会社（2019/01発売） ISBN-10: 4627741928