Find Research Outputs

Search concepts
Selected filters

Publication Year

  • 2020
  • 2019
  • 2018
  • 2017
  • 2016
  • 2015
  • 2014
  • 2013
  • 2012
  • 2011

Author

  • Tetsuo Oka
2015

Educational programs for freshmen based on forefront scientific researches on the environmental purification project with intense magnetic fields

Oka, T., Yamauchi, T., Abe, K., Narumi, T. & Tanabe, Y., 2015 Jan 1, Proceedings of 2014 International Conference on Interactive Collaborative Learning, ICL 2014. Institute of Electrical and Electronics Engineers Inc., p. 1068-1072 5 p. 7017931

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Roles and effects of human network of supporting experts out of Niigata University to practical engineering education

Oka, T., Abe, K., Yamauchi, T., Narumi, T., Ishii, N., Nishimura, S., Sato, T., Tanabe, Y. & Sengoku, M., 2015 Nov 4, Proceedings of 2015 International Conference on Interactive Collaborative Learning, ICL 2015. Institute of Electrical and Electronics Engineers Inc., p. 150-154 5 p. 7318017

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2018

Development of Engineering Education Program for Students before Starting Graduation Researches on Forefront Technologies

Oka, T., Suzuki, T., Abe, K., Yamauchi, T., Yamagiwa, K., Sato, T., Tanabe, Y. & Narumi, T., 2018 Sep 17, Proceedings - 2017 7th World Engineering Education Forum, WEEF 2017- In Conjunction with: 7th Regional Conference on Engineering Education and Research in Higher Education 2017, RCEE and RHEd 2017, 1st International STEAM Education Conference, STEAMEC 2017 and 4th Innovative Practices in Higher Education Expo 2017, I-PHEX 2017. Institute of Electrical and Electronics Engineers Inc., p. 136-139 4 p. 8467132

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2016

Influence of the Position of a Small Hole on the Trapped Field Performance in a Holed Superconducting Bulk Magnet

Yokoyama, K., Kulawansha, M. P. E. S., Yuanding, Z. & Oka, T., 2016 Apr 1, In : IEEE Transactions on Applied Superconductivity. 26, 3, 7416160.

Research output: Contribution to journalArticle

3 Citations (Scopus)
2019

Generation of Uniform Magnetic Field between Face-to-Face HTS Bulk Magnets

Oka, T., Higa, K., Tsunoda, S., Ogawa, J., Fukui, S., Inoue, N., Miryala, M., Murakami, M., Yokoyama, K. & Nakamura, T., 2019 Oct 15, In : Journal of Physics: Conference Series. 1293, 1, 012044.

Research output: Contribution to journalConference article

Open Access
2012

Magnetic field distribution of permanent magnet magnetized by static magnetic field generated by HTS bulk magnet

Oka, T., Kawasaki, N., Fukui, S., Ogawa, J., Sato, T., Terasawa, T., Itoh, Y. & Yabuno, R., 2012 Jun 25, In : IEEE Transactions on Applied Superconductivity. 22, 3, 6101562.

Research output: Contribution to journalArticle

6 Citations (Scopus)
2016

Uniform Magnetic Field between Face-to-Face HTS Bulk Magnets Combining Concave and Convex Magnetic Field Distributions

Oka, T., Takahashi, Y., Yaginuma, S., Ogawa, J., Fukui, S., Sato, T., Yokoyama, K. & Nakamura, T., 2016 Jan 1, In : Physics Procedia. 81, p. 45-48 4 p.

Research output: Contribution to journalConference article

2 Citations (Scopus)
2012

Magnetizing of permanent magnets using HTS bulk magnets

Oka, T., Muraya, T., Kawasaki, N., Fukui, S., Ogawa, J., Sato, T. & Terasawa, T., 2012 Jan 1, In : Cryogenics. 52, 1, p. 27-31 5 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)
2018

Magnetizing performance evaluation of HTS bulk magnet using a 12 K refrigerator with high cooling capacity

Yokoyama, K., Katsuki, A., Miura, A. & Oka, T., 2018 Aug 13, (Accepted/In press) In : IEEE Transactions on Applied Superconductivity.

Research output: Contribution to journalArticle

2013

Pulsed-field Invasion to HTS Bulk Magnets Grown from Two Seeds with Varied Seed-crystal Positions and Numbers

Oka, T., Yamada, Y., Horiuchi, T., Ogawa, J., Fukui, S., Sato, T., Yokoyama, K. & Langer, M., 2013 Jan 1, In : Physics Procedia. 58, p. 74-77 4 p.

Research output: Contribution to journalConference article

Open Access
2 Citations (Scopus)
2012

Numerical study of optimization design of high temperature superconducting field winding in 20 MW synchronous motor for ship propulsion

Fukui, S., Kawai, T., Takahashi, M., Ogawa, J., Oka, T., Sato, T. & Tsukamoto, O., 2012 Jun 25, In : IEEE Transactions on Applied Superconductivity. 22, 3, 5200504.

Research output: Contribution to journalArticle

12 Citations (Scopus)
2019

Improvement of the trapped field of REBCO bulk activated by pulsed field magnetization with a large soft-iron yoke

Yokoyama, K. & Oka, T., 2019 Oct 15, In : Journal of Physics: Conference Series. 1293, 1, 012046.

Research output: Contribution to journalConference article

Open Access
2013

Experimental verification of the magnetic flux penetration property and flux flow inhibition effect of a superconducting bulk magnet with small holes

Yokoyama, K., Oka, T., Kondo, N. & Hosaka, S., 2013 Jan 1, In : Physics Procedia. 45, p. 261-264 4 p.

Research output: Contribution to journalConference article

3 Citations (Scopus)

Magnetic and thermal properties of HTS bulk magnet in the pulsed-field magnetizing process

Oka, T., Ishiduka, D., Ogawa, J., Fukui, S., Sato, T., Yokoyama, K. & Murakami, A., 2013 Apr 1, In : Journal of Superconductivity and Novel Magnetism. 26, 4, p. 1301-1306 6 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)
2015

Attempt to generate a strong and uniform magnetic field by face-to-face HTS bulk elements in a magnet system

Oka, T., Hirayama, E., Takahashi, Y., Kanai, T., Ogawa, J., Fukui, S., Sato, T., Yokoyama, K. & Nakamura, T., 2015 Jan 1, In : Physics Procedia. 67, p. 1005-1009 5 p.

Research output: Contribution to journalConference article

3 Citations (Scopus)
2011

Development and test of model apparatus utilizing HTS magnetic levitation for non-contact spinning clean-up processors of photo mask production

Saito, K., Fukui, S., Ogawa, J., Oka, T., Sato, T., Sorimachi, S. & Miyazaki, S., 2011 Jun 1, In : IEEE Transactions on Applied Superconductivity. 21, 3 PART 2, p. 2241-2244 4 p., 5617305.

Research output: Contribution to journalArticle

2 Citations (Scopus)
2014

Strong magnetic field generator containing HTS bulk magnets and compact refrigerators

Oka, T., Hirayama, E., Kanai, T., Ogawa, J., Fukui, S., Sato, T., Yokoyama, K. & Nakamura, T., 2014 Jan 1, In : IEEE Transactions on Applied Superconductivity. 24, 3, 6626624.

Research output: Contribution to journalArticle

18 Citations (Scopus)
2012

Measurement and numerical analysis of AC loss in high temperature superconducting coil

Fukui, S., Shibayama, M., Ogawa, J., Oka, T., Sato, T., Takao, T. & Tsukamoto, O., 2012 Jun 25, In : IEEE Transactions on Applied Superconductivity. 22, 3, 4704904.

Research output: Contribution to journalArticle

3 Citations (Scopus)
2017

Influence of Artificial Defects on Trapped Field Performance in a Superconducting Bulk Magnet

Yokoyama, K., Eranda, K., Zhao, Y., Katsuki, A., Miura, A. & Oka, T., 2017 Jul 26, In : Journal of Physics: Conference Series. 871, 1, 012050.

Research output: Contribution to journalConference article

1 Citation (Scopus)
2012

Pulsed-field magnetization of a superconducting bulk magnet after field cooling using a permanent magnet

Yokoyama, K., Oka, T. & Noto, K., 2012 Jun 25, In : IEEE Transactions on Applied Superconductivity. 22, 3, 6094195.

Research output: Contribution to journalArticle

2016

Development of a Desktop-Type Superconducting Bulk Magnet

Yokoyama, K., Kulawansha, E., Yuanding, Z. & Oka, T., 2016 Jun 1, In : IEEE Transactions on Applied Superconductivity. 26, 4, 7386635.

Research output: Contribution to journalArticle

7 Citations (Scopus)
2013

Flux-invading behaviors and temperature changes in Dy123 bulk magnet in iterative pulse field magnetization process

Oka, T., Ishiduka, D., Ogawa, J., Fukui, S., Sato, T., Yokoyama, K., Murakami, A. & Stopfel, H., 2013 May 6, In : Physica C: Superconductivity and its Applications. 494, p. 46-49 4 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)
2018
1 Citation (Scopus)
2017

Magnetic Separation Using HTS Bulk Magnet for Cs-Bearing Fe precipitates

Oka, T., Ichiju, K., Sasaki, S., Ogawa, J., Fukui, S., Sato, T., Ooizumi, M., Yokoyama, K., Aoki, S. & Ohnishi, N., 2017 Sep 21, In : Journal of Physics: Conference Series. 897, 1, 012024.

Research output: Contribution to journalConference article

1 Citation (Scopus)
2014

Magnetic separation technique using high temperature superconducting bulk magnets and application to plating liquid waste treatment

Oka, T., Fukazawa, H., Yoshizawa, N., Takayanagi, Y., Ogawa, J., Fukui, S., Sato, T., Ooizumi, M., Tsujimura, M. & Yokoyama, K., 2014 Jan 1, In : Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy. 61, SUPLL.1

Research output: Contribution to journalArticle

2018

Strong magnetic field generation by superconducting bulk magnets using various types of refrigerators and considering an efficient magnetization

Yokoyama, K. & Oka, T., 2018 Jan 1, High-Temperature Superconductors: Occurrence, Synthesis and Applications. Nova Science Publishers, Inc., p. 369-385 17 p.

Research output: Chapter in Book/Report/Conference proceedingChapter

2019

International individual internship based on research collaboration on engineering education and academic science

Oka, T., Murakami, M., Sengoku, M., Sato, T., Ogawa, J., Yamagiwa, K., Suzuki, T., Nishimura, S. Y. & Kaneko, F., 2019 Jan 29, 2018 World Engineering Education Forum - Global Engineering Deans Council, WEEF-GEDC 2018. Institute of Electrical and Electronics Engineers Inc., 8629681. (2018 World Engineering Education Forum - Global Engineering Deans Council, WEEF-GEDC 2018).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2014

Collection of Ni-bearing material from electroless plating waste by magnetic separation with HTS bulk magnet

Oka, T., Fukazawa, H., Fukui, S., Ogawa, J., Sato, T., Ooizumi, M., Tsujimura, M. & Yokoyama, K., 2014 Jan 15, In : Physica C: Superconductivity and its Applications. 496, C, p. 58-62 5 p.

Research output: Contribution to journalArticle

11 Citations (Scopus)
2015

Improvement of the trapped field performance of a holed superconducting bulk magnet

Yokoyama, K., Igarashi, R., Togasaki, R. & Oka, T., 2015 Jun 1, In : IEEE Transactions on Applied Superconductivity. 25, 3, 7006763.

Research output: Contribution to journalArticle

2 Citations (Scopus)
2017

Experimental investigation of AC loss characteristics in HTS tape with rotating magnetic field

Ogawa, J., Fukui, S., Oka, T., Sano, Y., Ogawa, M. & Ranecky, S. T., 2017 Jun 1, In : IEEE Transactions on Applied Superconductivity. 27, 4, 7812682.

Research output: Contribution to journalArticle

2 Citations (Scopus)
2015

Magnetization behavior of RE123 bulk magnets bearing twin seed-crystals in pulsed field magnetization processes

Oka, T., Miyazaki, T., Ogawa, J., Fukui, S., Sato, T., Yokoyama, K. & Langer, M., 2015 Dec 17, In : Superconductor Science and Technology. 29, 2, 024003.

Research output: Contribution to journalArticle

5 Citations (Scopus)
2018

Comparison of Trapped Field Characteristic of Bulk Magnet System Using Various Type Refrigerators

Yokoyama, K., Katsuki, A., Miura, A. & Oka, T., 2018 Jul 26, In : Journal of Physics: Conference Series. 1054, 1, 012072.

Research output: Contribution to journalConference article

2016

Magnetic Separation for Recovering Ni Compounds from Plating Waste with Use of HTS Bulk Magnets

Oka, T., Takayanagi, Y., Machida, S., Ichiju, K., Fukui, S., Ogawa, J., Sato, T., Ooizumi, M., Tsujimura, M. & Yokoyama, K., 2016 Jun 1, In : IEEE Transactions on Applied Superconductivity. 26, 4, 7383257.

Research output: Contribution to journalArticle

8 Citations (Scopus)
2015

A Numerical Proposal of an After Heating Method for Pulse Field Magnetization for HTS Bulk Magnets

Ogawa, J., Oka, T., Fukui, S., Sato, T. & Watanabe, N., 2015 Jun 1, In : IEEE Transactions on Applied Superconductivity. 25, 3, 6945334.

Research output: Contribution to journalArticle

2011

Evaluation of pulsed-field magnetization on a superconducting bulk magnet system using a 13 K refrigerator

Yokoyama, K., Oka, T. & Noto, K., 2011 Jun 1, In : IEEE Transactions on Applied Superconductivity. 21, 3 PART 2, p. 1657-1660 4 p., 5624613.

Research output: Contribution to journalArticle

5 Citations (Scopus)
2012

Influence of AC transport current balance on AC loss in a two layered polygonal YBCO assembled conductor

Ogawa, J., Fukui, S., Oka, T., Sato, T., Tamura, A., Kasuga, E. & Ryu, K. W., 2012 Jun 25, In : IEEE Transactions on Applied Superconductivity. 22, 3, 4704804.

Research output: Contribution to journalArticle

2 Citations (Scopus)
2011

Performance of trapped magnetic field in superconducting bulk magnets activated by pulsed field magnetization

Oka, T., Seki, H., Ogawa, J., Fukui, S., Sato, T. & Yokoyama, K., 2011 Jun 1, In : IEEE Transactions on Applied Superconductivity. 21, 3 PART 3, p. 3356-3359 4 p., 5658131.

Research output: Contribution to journalArticle

13 Citations (Scopus)
2019
2016

Magnetic Field Direction Dependence of AC Losses in Bi2223/Ag Tape

Ogawa, J., Fukui, S., Oka, T., Shidara, N., Iwashita, R. & Ohya, M., 2016 Jun 1, In : IEEE Transactions on Applied Superconductivity. 26, 4, 7377072.

Research output: Contribution to journalArticle

2013

Measurement and numerical analysis of dependence of ac loss in polygonal conductor assembled by YBCO tapes on gap length between neighboring tapes

Fukui, S., Hatakeyama, S., Nanayama, J., Maruko, A., Ogawa, J., Sato, T., Oka, T. & Tsukamoto, O., 2013 Feb 12, In : IEEE Transactions on Applied Superconductivity. 23, 3, 6407801.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Investigation of the Flux Flow-inhibiting Effect of a Hole-opened Superconducting Bulk Magnet

Yokoyama, K., Tsukui, T., Mita, H., Tsubonoya, N. & Oka, T., 2013 Jan 1, In : Physics Procedia. 58, p. 302-305 4 p.

Research output: Contribution to journalConference article

Open Access
2011

Improvement of a magnetization method on a small-size superconducting bulk magnet system

Yokoyama, K., Oka, T. & Noto, K., 2011 Nov 1, In : Physica C: Superconductivity and its Applications. 471, 21-22, p. 901-904 4 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)
2016

Experimental Investigation of AC Loss Characteristics of Stacked HTS Tapes in an Iron Core

Ogawa, J., Fukui, S., Oka, T., Sakurai, T., Sano, Y., Tada, H. & Yoshii, Y., 2016 Jun 1, In : IEEE Transactions on Applied Superconductivity. 26, 4, 7435291.

Research output: Contribution to journalArticle

7 Citations (Scopus)
2013

Development and test of model apparatus of non-contact spin processor for photo mask production applying radial-type superconducting magnetic bearing

Saito, K., Fukui, S., Maezawa, M., Ogawa, J., Oka, T. & Sato, T., 2013 Jan 15, In : Physica C: Superconductivity and its Applications. 484, p. 321-324 4 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)
2011

Magnetic separation technique for groundwater by five HTS melt-processed bulk magnets arranged in a line

Oka, T., Seki, H., Kimura, T., Mimura, D., Fukui, S., Ogawa, J., Sato, T., Ooizumi, M., Fujishiro, H., Hayashi, H., Yokoyama, K. & Stiehler, C., 2011 Nov 1, In : Physica C: Superconductivity and its Applications. 471, 21-22, p. 1506-1510 5 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)
2015

Preferential magnetic flux invasion and heat generation owing to macrostructure in HTS bulk magnets in pulse field magnetization processes

Oka, T., Ota, H., Shimoda, T., Ogawa, J., Fukui, S., Sato, T., Yokoyama, K., Murakami, A. & Langer, M., 2015 Jun 1, In : IEEE Transactions on Applied Superconductivity. 25, 3, 6980106.

Research output: Contribution to journalArticle

3 Citations (Scopus)
2017

Experimental and theoretical study of AC losses in variable asymmetrical magnetic environments

Ranecky, S. T., Watanabe, H., Ogawa, J., Oka, T., Gölden, D., Alff, L. & Genenko, Y. A., 2017 Jul 6, In : Superconductor Science and Technology. 30, 8, 085005.

Research output: Contribution to journalArticle

5 Citations (Scopus)
2014

Influence of the arrangement of HTS tapes inserted in an iron core on AC loss characteristics

Ogawa, J., Fukui, S., Oka, T., Sato, T., Fushimi, A. & Shoda, T., 2014 Jan 1, In : IEEE Transactions on Applied Superconductivity. 24, 3, 6595123.

Research output: Contribution to journalArticle

4 Citations (Scopus)
2019
Open Access
3 Citations (Scopus)