Research Output 1983 2020

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2010
5 Citations (Scopus)

Conducted-noise characteristics of a digitally-controlled randomly-switched dc-dc converter with an FPGA-based implementation

Dousoky, G. M., Shoyama, M. & Ninomiya, T., May 2010, In : Journal of Power Electronics. 10, 3, p. 228-234 7 p.

Research output: Contribution to journalArticle

Field programmable gate arrays (FPGA)
Controllers
Clocks
Feedback
Networks (circuits)
6 Citations (Scopus)

Development of low AC loss windings for superconducting traction transformer

Kamijo, H., Hata, H., Fukumoto, Y., Tomioka, A., Bohno, T., Yamada, H., Ayai, N., Yamasaki, K., Kato, T., Iwakuma, M. & Funaki, K., Jan 1 2010, In : Journal of Physics: Conference Series. 234, PART 3, 032027.

Research output: Contribution to journalArticle

traction
transformers
tapes
alternating current
vibration tests
10 Citations (Scopus)

Direct etching of poly(methyl methacrylate) using laser plasma soft X-rays

Torii, S., Makimura, T., Okazaki, K., Nakamura, D., Takahashi, A., Okada, T., Niino, H. & Murakami, K., Jun 1 2010, In : Applied Physics Express. 3, 6, 066502.

Research output: Contribution to journalArticle

Polymethyl methacrylates
laser plasmas
polymethyl methacrylate
Etching
etching
1 Citation (Scopus)

Enhancement and stabilization of pulsed streamer discharge in water by adding carbon nanotubes

Imasaka, K., Sun, W., Tomita, H., Kato, Y., Khaled, U. & Suehiro, J., Aug 1 2010, In : Japanese Journal of Applied Physics. 49, 8 PART 1, 086203.

Research output: Contribution to journalArticle

Single-walled carbon nanotubes (SWCN)
Carbon nanotubes
Stabilization
stabilization
carbon nanotubes
11 Citations (Scopus)

Fabrication and characterization of nanomaterial-based sensors using dielectrophoresis

Suehiro, J., Jan 1 2010, In : Biomicrofluidics. 4, 2, 004095BMF.

Research output: Contribution to journalArticle

Nanostructures
Electrophoresis
Nanostructured materials
Fabrication
fabrication
12 Citations (Scopus)

Investigation of low-temperature excitonic and defect emission from Ni-doped ZnO nanoneedles and V-doped ZnO nanostructured film

Singh, S., Nakamura, D., Sakai, K., Okada, T. & Ramachandra Rao, M. S., Feb 9 2010, In : New Journal of Physics. 12, 023007.

Research output: Contribution to journalArticle

defects
thin films
replicas
polaritons
pulsed laser deposition

Micromachining of silica glass using EUV radiation of laser-produced plasma

Takahashi, A., Torii, S., Makimura, T., Murakami, K., Okazaki, K., Nakamura, D., Okada, T. & Niino, H., 2010, In : IEEJ Transactions on Electronics, Information and Systems. 130, 10, p. 1779-1783+12

Research output: Contribution to journalArticle

Laser produced plasmas
Micromachining
Fused silica
Ultraviolet radiation
Lasers

Micromachining of transparent materials with Fresnel diffraction of infrared radiation

Okazaki, K., Torii, S., Makimura, T., Niino, H., Murakami, K., Nakamura, D., Takahashi, A. & Okada, T., Dec 1 2010, In : Journal of Laser Micro Nanoengineering. 5, 3, p. 269-272 4 p.

Research output: Contribution to journalArticle

Fresnel diffraction
transparence
Micromachining
infrared radiation
silica glass
2 Citations (Scopus)

Performance of HTS SQUID coupled to cooled-Cu/superconductor pickup coil

Enpuku, K., Tsuji, Y., Hirakawa, S., Matsuo, M. & Yoshida, T., Nov 1 2010, In : Physica C: Superconductivity and its applications. 470, 20, p. 1511-1514 4 p.

Research output: Contribution to journalArticle

Pickups
SQUIDs
Superconducting materials
Magnetometers
coils
3 Citations (Scopus)

Solubilization of single-walled carbon nanotubes using Ozone generated by dielectric barrier discharge

Sun, W., Khaled, U., Tomita, H., Li, Z., Imasaka, K. & Suehiro, J., May 1 2010, In : Japanese Journal of Applied Physics. 49, 5 PART 1, p. 550021-550025 5 p.

Research output: Contribution to journalArticle

Single-walled carbon nanotubes (SWCN)
Ozone
ozone
carbon nanotubes
solubility
1 Citation (Scopus)

Spatially-resolved measurement on time-dependent electromagnetic behavior in alternating current carrying coated conductor

Higashikawa, K., Honda, Y., Inoue, M., Iwakuma, M., Kiss, T., Nakao, K., Yamada, Y. & Izumi, T., Nov 1 2010, In : Physica C: Superconductivity and its applications. 470, 20, p. 1280-1283 4 p.

Research output: Contribution to journalArticle

alternating current
conductors
Electric losses
electromagnetism
Scanning

Sviluppo di un trasformatore superconduttore per materiale rotabile

Translated title of the contribution: Development of a superconducting transformer for rolling stockFujimoto, H., Hata, H., Kamijo, H., Nagashima, K., Ikeda, K., Iwakuma, M., Funaki, K., Yamada, H., Sanuki, Y., Tomioka, A., Uwamori, K. & Yoshida, S., Dec 1 2010, In : C e Ca. 40, 1, p. 33-39 7 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Totem-pole power-factor-correction converter under critical-conduction-mode interleaved operation

Firmansyah, E., Tomioka, S., Abe, S., Shoyama, M. & Ninomiya, T., Sep 2010, In : IEICE Transactions on Communications. E93-B, 9, p. 2250-2256 7 p.

Research output: Contribution to journalArticle

Poles
Topology
1 Citation (Scopus)

Transport and AC loss properties of the repaired multifilamentary REBCO superconducting tapes

Yamasaki, S., Iwakuma, M., Funaki, K., Kato, J., Chikumoto, T., Tanabe, K., Nakao, K., Izumi, T., Yamada, Y., Shiohara, Y. & Saito, T., Nov 1 2010, In : Physica C: Superconductivity and its applications. 470, 20, p. 1316-1320 5 p.

Research output: Contribution to journalArticle

Superconducting tapes
tapes
alternating current
conductors
Pickups

Uncertainty considerations in AC loss measurement of multifilamentary superconducting wires performed via a pickup coil method

Funaki, K., Fujikami, J., Iwakuma, M., Kasahara, H., Kawabata, S., Tanaka, Y. & Ehara, K., Feb 1 2010, In : Cryogenics. 50, 2, p. 111-117 7 p.

Research output: Contribution to journalArticle

Superconducting wire
Pickups
alternating current
coils
wire
2009
36 Citations (Scopus)

Aligned growth of ZnO nanowires by NAPLD and their optical characterizations

Guo, R., Matsumoto, M., Matsumoto, T., Higashihata, M., Nakamura, D. & Okada, T., Sep 30 2009, In : Applied Surface Science. 255, 24, p. 9671-9675 5 p.

Research output: Contribution to journalArticle

Laser ablation
Pulsed lasers
Nanowires
Nanoparticles
Semiconductor lasers
Linear motors
Force control
Vibration control
Induction motors
Propulsion
7 Citations (Scopus)

Bacterial detection using a carbon nanotube gas sensor coupled with a microheater for ammonia synthesis by aerobic oxidisation of organic components

Suehiro, J., Ikeda, N., Ohtsubo, A. & Imasaka, K., Jun 11 2009, In : IET Nanobiotechnology. 3, 2, p. 15-22 8 p.

Research output: Contribution to journalArticle

Carbon Nanotubes
Chemical sensors
Ammonia
Carbon nanotubes
Bacteria
7 Citations (Scopus)

Development of 1 kA class HTS coil for superconducting power transformers

Okamoto, H., Hayashi, H., Iwakuma, M., Iijima, Y., Saito, T., Izumi, T., Yamada, Y. & Shiohara, Y., Oct 15 2009, In : Physica C: Superconductivity and its applications. 469, 15-20, p. 1733-1735 3 p.

Research output: Contribution to journalArticle

Power transformers
transformers
strands
Rare earths
alternating current
18 Citations (Scopus)

Development of a turbine cryocooler for high temperature superconductor applications

Hirai, H., Suzuki, Y., Hirokawa, M., Kobayashi, H., Kamioka, Y., Iwakuma, M. & Shiohara, Y., Oct 15 2009, In : Physica C: Superconductivity and its applications. 469, 15-20, p. 1857-1861 5 p.

Research output: Contribution to journalArticle

High temperature superconductors
Refrigerators
refrigerators
turbines
high temperature superconductors
9 Citations (Scopus)

Development of low-AC-loss Bi-2223 superconducting multifilamentary wires

Funaki, K., Sasasige, Y., Yanagida, H., Yamasaki, S., Iwakuma, M., Ayai, N., Ishida, T., Fukumoto, Y. & Kamijo, H., Jun 1 2009, In : IEEE Transactions on Applied Superconductivity. 19, 3, p. 3053-3056 4 p., 5153246.

Research output: Contribution to journalArticle

Superconducting wire
alternating current
wire
Wire
transformers
35 Citations (Scopus)

Development of REBCO superconducting power transformers in Japan

Iwakuma, M., Hayashi, H., Okamoto, H., Tomioka, A., Konno, M., Saito, T., Iijima, Y., Suzuki, Y., Yoshida, S., Yamada, Y., Izumi, T. & Shiohara, Y., Oct 15 2009, In : Physica C: Superconductivity and its applications. 469, 15-20, p. 1726-1732 7 p.

Research output: Contribution to journalArticle

Power transformers
transformers
Tapes
tapes
Japan
Electrophoresis
Nanostructured materials
Fabrication
Nanowires
Carbon nanotubes
9 Citations (Scopus)

Effects of pH on water-solubilization of carbon nanotube using microplasma in aqueous solution

Imasaka, K., Kato, Y., Khaled, U. & Suehiro, J., Jun 1 2009, In : Japanese journal of applied physics. 48, 6, 065004.

Research output: Contribution to journalArticle

microplasmas
Carbon nanotubes
Solubility
carbon nanotubes
aqueous solutions
71 Citations (Scopus)

Electroluminescence from ZnO nanowire-based p-GaN/n-ZnO heterojunction light-emitting diodes

Guo, R., Nishimura, J., Matsumoto, M., Higashihata, M., Nakamura, D. & Okada, T., Jan 1 2009, In : Applied Physics B: Lasers and Optics. 94, 1, p. 33-38 6 p.

Research output: Contribution to journalArticle

electroluminescence
heterojunctions
nanowires
light emitting diodes
diodes

Input current-ripple reduction methods for pulse-link DC-AC converter for fuel cells

Fukushima, K., Shoyama, M., Norigoe, I., Ninomiya, T., Harada, Y. & Tsukakoshi, K., Mar 1 2009, In : Research Reports on Information Science and Electrical Engineering of Kyushu University. 14, 1, p. 7-12 6 p.

Research output: Contribution to journalArticle

Fuel cells
Capacitors
Topology
Inductance
Pulse width modulation

Loss analysis of single-phase PFC converter with switching ripple current

Uematsu, T., Fukushima, K., Shoyama, M. & Ninomiya, T., Sep 1 2009, In : Research Reports on Information Science and Electrical Engineering of Kyushu University. 14, 2, p. 83-88 6 p.

Research output: Contribution to journalArticle

Electric potential
Networks (circuits)
Switching frequency
Equivalent circuits
Experiments

Optimal design considerations of a bus converter for on-board distributed power systems

Abe, S., Hirokawa, M., Shoyama, M. & Ninomiya, T., May 20 2009, In : Journal of Power Electronics. 9, 3, p. 447-455 9 p.

Research output: Contribution to journalArticle

System stability
Capacitors
Stability criteria
Electric power systems
Optimal design
15 Citations (Scopus)

Production and test of a Rebco superconducting synchronous motor

Iwakuma, M., Hase, Y., Satou, T., Tomioka, A., Konno, M., Iijima, Y., Saitoh, T., Yamada, Y., Izumi, T. & Shiohara, Y., Jun 1 2009, In : IEEE Transactions on Applied Superconductivity. 19, 3, p. 1648-1651 4 p., 5067122.

Research output: Contribution to journalArticle

synchronous motors
field coils
Synchronous motors
rotors
Rotors
66 Citations (Scopus)
Magnetic fluids
alternating current
magnetic permeability
Relaxation time
fluids
15 Citations (Scopus)

Summary of a 1 MJ conduction-cooled LTS pulse coil developed for 1 MW, 1 s UPS-SMES

Mito, T., Chikaraishi, H., Kawagoe, A., Maekawa, R., Abe, R., Baba, T., Okumura, K., Kuge, A., Iwakuma, M. & Sumiyoshi, F., Jun 1 2009, In : IEEE Transactions on Applied Superconductivity. 19, 3, p. 1999-2003 5 p., 5109586.

Research output: Contribution to journalArticle

coils
conduction
pulses
Wire
Cooling
68 Citations (Scopus)

ZnO nanowalls grown with high-pressure PLD and their applications as field emitters and UV detectors

Cao, B. Q., Matsumoto, T., Matsumoto, M., Higashihata, M., Nakamura, D. & Okada, T., Jun 25 2009, In : Journal of Physical Chemistry C. 113, 25, p. 10975-10980 6 p.

Research output: Contribution to journalArticle

Ultraviolet detectors
Aluminum Oxide
Pulsed laser deposition
Sapphire
pulsed laser deposition
2008
8 Citations (Scopus)

Ablation dynamics of tin micro-droplet irradiated by double pulse laser used for extreme ultraviolet lithography source

Nakamura, D., Akiyama, T., Okazaki, K., Tamaru, K., Takahashi, A. & Okada, T., Dec 1 2008, In : Journal of Physics D: Applied Physics. 41, 24, 245210.

Research output: Contribution to journalArticle

Extreme ultraviolet lithography
Tin
Ablation
ablation
Laser pulses
7 Citations (Scopus)

AC losses in a conduction-cooled LTS pulse coil with stored energy of 1 MJ for UPS-SMES as protection from momentary voltage drops

Kawagoe, A., Tsukuda, S., Sumiyoshi, F., Mito, T., Chikaraishi, H., Baba, T., Yokota, M., Ogawa, H., Hemmi, T., Abe, R., Nakamura, A., Okumura, K., Kuge, A. & Iwakuma, M., Jun 1 2008, In : IEEE Transactions on Applied Superconductivity. 18, 2, p. 783-786 4 p., 4497938.

Research output: Contribution to journalArticle

magnetic energy storage
Uninterruptible power systems
power supplies
Energy storage
alternating current
13 Citations (Scopus)

AC loss properties in YBCO model coils for loss reduction

Okamoto, H., Hayashi, H., Tomioka, A., Konno, M., Owa, M., Kawagoe, A., Sumiyoshi, F., Iwakuma, M., Suzuki, K., Izumi, T., Yamada, Y. & Shiohara, Y., Sep 15 2008, In : Physica C: Superconductivity and its applications. 468, 15-20, p. 1731-1733 3 p.

Research output: Contribution to journalArticle

Tapes
tapes
alternating current
coils
filaments
2 Citations (Scopus)

AC loss properties of Cu-sheathed MgB2 composites with Nb barriers

Funaki, K., Sueyoshi, T., Kajikawa, K., Iwakuma, M., Tanaka, K., Okada, M., Kumakura, H. & Hayashi, H., Feb 1 2008, In : Journal of Physics: Conference Series. 97, 1, 012316.

Research output: Contribution to journalArticle

filaments
alternating current
composite materials
liquid helium
coils
14 Citations (Scopus)

AC loss properties of MgB2 multifilament wires

Tanaka, K., Funaki, K., Sueyoshi, T., Sasashige, Y., Kajikawa, K., Iwakuma, M., Okada, M., Kumakura, H. & Hayashi, H., Sep 1 2008, In : Superconductor Science and Technology. 21, 9, 095007.

Research output: Contribution to journalArticle

alternating current
wire
Wire
hollow
filaments
19 Citations (Scopus)

Aligned growth of ZnO nanowires and lasing in single ZnO nanowire optical cavities

Guo, R. Q., Nishimura, J., Matsumoto, M., Higashihata, M., Nakamura, D., Suehiro, J. & Okada, T., Mar 1 2008, In : Applied Physics B: Lasers and Optics. 90, 3-4, p. 539-542 4 p.

Research output: Contribution to journalArticle

lasing
nanowires
cavities
optical pumping
gases
1 Citation (Scopus)
Linear motors
Vibration control
Induction motors
Propulsion
Harmonic analysis
1 Citation (Scopus)

Application of a flow generated by IR laser and AC electric field in micropumping and micromixing

Nakano, M. & Mizuno, A., Jan 1 2008, In : Journal of Physics: Conference Series. 142, 012021.

Research output: Contribution to journalArticle

infrared lasers
alternating current
flow distribution
electric fields
lasers

A round robin test for pre-standardization of a saddle-shaped pickup coil method to measure AC losses in Bi-2223 Ag-sheathed tapes

Funaki, K., Iwakuma, M., Sueyoshi, T., Fujikami, J., Ayai, N., Ishida, T., Tanaka, Y. & Osamura, K., Sep 15 2008, In : Physica C: Superconductivity and its applications. 468, 15-20, p. 1787-1791 5 p.

Research output: Contribution to journalArticle

Pickups
saddles
standardization
Tapes
Standardization
6 Citations (Scopus)

Basic AC loss properties of IBAD/CVD-YBCO tapes for pancake-type coils

Funaki, K., Sueyoshi, T., Iwakuma, M., Shikimachi, K., Hirano, N. & Nagaya, S., Sep 15 2008, In : Physica C: Superconductivity and its applications. 468, 15-20, p. 1723-1726 4 p.

Research output: Contribution to journalArticle

Ion beam assisted deposition
Tapes
tapes
Chemical vapor deposition
alternating current
41 Citations (Scopus)

Catalyst-free synthesis of vertically-aligned ZnO nanowires by nanoparticle-assisted pulsed laser deposition

Guo, R. Q., Nishimura, J., Matsumoto, M., Nakamura, D. & Okada, T., Dec 1 2008, In : Applied Physics A: Materials Science and Processing. 93, 4, p. 843-847 5 p.

Research output: Contribution to journalArticle

Pulsed laser deposition
Nanowires
pulsed laser deposition
Laser ablation
nanowires
2 Citations (Scopus)

Culturing of cells as influenced by exposure to AC and DC fields

Abdel-Salam, M., Nakano, M., Tanino, M. & Mizuno, A., Jan 1 2008, In : Journal of Physics: Conference Series. 142, 012051.

Research output: Contribution to journalArticle

alternating current
direct current
cells
blowing
yeast
27 Citations (Scopus)

Density-controlled growth of ZnO nanowires via nanoparticle-assisted pulsed-laser deposition and their optical properties

Guo, R., Nishimura, J., Matsumoto, M., Higashihata, M., Nakamura, D. & Okada, T., Jan 22 2008, In : Japanese journal of applied physics. 47, 1 PART 2, p. 741-745 5 p.

Research output: Contribution to journalArticle

Pulsed laser deposition
Nanowires
pulsed laser deposition
nanowires
Optical properties
9 Citations (Scopus)

Development of a 7.5 kW YBCO superconducting synchronous motor

Iwakuma, M., Hase, Y., Satou, T., Tomioka, A., Konno, M., Iijima, Y., Saitoh, T., Yamada, Y., Izumi, T. & Shiohara, Y., Jun 1 2008, In : IEEE Transactions on Applied Superconductivity. 18, 2, p. 689-692 4 p., 4517326.

Research output: Contribution to journalArticle

synchronous motors
Synchronous motors
rotors
field coils
Helium
12 Citations (Scopus)

Development of scribing process of coated conductors for reduction of AC losses

Suzuki, K., Yoshizumi, M., Izumi, T., Shiohara, Y., Iwakuma, M., Ibi, A., Miyata, S. & Yamada, Y., Sep 15 2008, In : Physica C: Superconductivity and its Applications. 468, 15-20, p. 1579-1582 4 p.

Research output: Contribution to journalArticle

scoring
Tapes
tapes
filaments
alternating current
16 Citations (Scopus)

Effects of a ferromagnetic substrate on hysteresis losses of a YBa2Cu3O7 coated conductor in perpendicular ac applied magnetic fields

Suenaga, M., Iwakuma, M., Sueyoshi, T., Izumi, T., Mimura, M., Takahashi, Y. & Aoki, Y., Sep 15 2008, In : Physica C: Superconductivity and its applications. 468, 15-20, p. 1714-1717 4 p.

Research output: Contribution to journalArticle

Hysteresis
conductors
hysteresis
Magnetic fields
Substrates
7 Citations (Scopus)

Effects of a ferromagnetic substrate on hysteresis losses of a YBa 2Cu3O7 coated conductor in perpendicular ac applied magnetic fields

Suenaga, M., Iwakuma, M., Sueyoshi, T., Izumi, T., Mimura, M., Takahashi, Y. & Aoki, Y., Feb 1 2008, In : Journal of Physics: Conference Series. 97, 1, 012025.

Research output: Contribution to journalArticle

conductors
hysteresis
magnetic fields
tapes
Hastelloy (trademark)
6 Citations (Scopus)

Effects of gas bubbling on water-solubilization of carbon nanotube using microplasma generated in water

Imasaka, K., Kato, Y. & Suehiro, J., Aug 30 2008, In : Surface and Coatings Technology. 202, 22-23, p. 5271-5274 4 p.

Research output: Contribution to journalArticle

microplasmas
Carbon Nanotubes
Carbon nanotubes
Single-walled carbon nanotubes (SWCN)
solubility