K. Ohira

1.5k total citations · 1 hit paper
55 papers, 1.0k citations indexed

About

K. Ohira is a scholar working on Aerospace Engineering, Biomedical Engineering and Mechanical Engineering. According to data from OpenAlex, K. Ohira has authored 55 papers receiving a total of 1.0k indexed citations (citations by other indexed papers that have themselves been cited), including 31 papers in Aerospace Engineering, 21 papers in Biomedical Engineering and 18 papers in Mechanical Engineering. Recurrent topics in K. Ohira's work include Spacecraft and Cryogenic Technologies (29 papers), Superconducting Materials and Applications (13 papers) and Heat Transfer and Boiling Studies (12 papers). K. Ohira is often cited by papers focused on Spacecraft and Cryogenic Technologies (29 papers), Superconducting Materials and Applications (13 papers) and Heat Transfer and Boiling Studies (12 papers). K. Ohira collaborates with scholars based in Japan, Germany and Netherlands. K. Ohira's co-authors include Jeremy L. O’Brien, N. Suzuki, V. Zwiller, H. Yoshida, Mizunori Ezaki, N. Iizuka, Robert H. Hadfield, Michael G. Tanner, Damien Bonneau and Mark G. Thompson and has published in prestigious journals such as Nature Photonics, Journal of Alloys and Compounds and New Journal of Physics.

In The Last Decade

K. Ohira

51 papers receiving 997 citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

On-chip quantum interference between silicon photon-pair sources

2013 344 citations K. Ohira et al. profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
K. Ohira Japan	19	409	348	301	274	233	55	1.0k
Long Chang China	12	415 1.0×	354 1.0×	973 3.2×	113 0.4×	18 0.1×	23	1.6k
S. Berge Norway	14	139 0.3×	190 0.5×	189 0.6×	37 0.1×	70 0.3×	29	1.1k
Xingwu Long China	13	330 0.8×	138 0.4×	164 0.5×	62 0.2×	91 0.4×	96	632
Henry W. Brandhorst United States	17	579 1.4×	196 0.6×	201 0.7×	21 0.1×	34 0.1×	121	873
Siegfried Janson United States	16	374 0.9×	436 1.3×	66 0.2×	29 0.1×	140 0.6×	59	819
Xiao‐Min Pan China	17	409 1.0×	216 0.6×	463 1.5×	23 0.1×	188 0.8×	79	796
Wenxia Pan China	18	556 1.4×	332 1.0×	301 1.0×	7 0.0×	75 0.3×	100	938
O. Tsukamoto Japan	25	1.1k 2.8×	183 0.5×	140 0.5×	16 0.1×	31 0.1×	228	2.3k
He Ming Yao Hong Kong	15	285 0.7×	153 0.4×	197 0.7×	71 0.3×	22 0.1×	39	758

Countries citing papers authored by K. Ohira

Since Specialization

Citations

This map shows the geographic impact of K. Ohira's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by K. Ohira with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites K. Ohira more than expected).

Fields of papers citing papers by K. Ohira

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by K. Ohira. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by K. Ohira. The network helps show where K. Ohira may publish in the future.

Co-authorship network of co-authors of K. Ohira

This figure shows the co-authorship network connecting the top 25 collaborators of K. Ohira. A scholar is included among the top collaborators of K. Ohira based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with K. Ohira. K. Ohira is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Ishizaka, Masahiro, et al.. (2025). Sex-based differences in body composition and functional independence affecting discharge destination in patients undergoing convalescent rehabilitation. Journal of Physical Therapy Science. 37(7). 367–371.

Ishizaka, Masahiro, et al.. (2025). Comparison of body composition between patients admitted to convalescent rehabilitation and long-term care wards. Journal of Physical Therapy Science. 37(3). 141–144. 1 indexed citations

Ohira, K., et al.. (2016). Pressure drop reduction and heat transfer deterioration of slush nitrogen in triangular and circular pipe flows. Cryogenics. 81. 60–75. 6 indexed citations

NAKAHATA, Kazuyuki, et al.. (2016). Ultrasonic imaging using signal post-processing for a flexible array transducer. NDT & E International. 82. 13–25. 30 indexed citations

Umemura, Yutaka, Takehiro Himeno, Kiyoshi Kinefuchi, et al.. (2015). Numerical Modeling of Boiling Flow in a Cryogenic Propulsion System. 51st AIAA/SAE/ASEE Joint Propulsion Conference. 2 indexed citations

Ohira, K., et al.. (2015). Pressure Drop and Heat Transfer Characteristics of Boiling Nitrogen in Square Pipe flow. Physics Procedia. 67. 675–680. 11 indexed citations

Ohira, K., et al.. (2012). Numerical study of flow and heat-transfer characteristics of cryogenic slush fluid in a horizontal circular pipe (SLUSH-3D). Cryogenics. 52(7-9). 428–440. 18 indexed citations

Ohira, K., et al.. (2011). Numerical Study of Flow and Heat-transfer Characteristics of Cryogenic Slush Fluid in a Horizontal Circular Pipe (SLUSH-3D). TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan). 46(10). 575–587. 2 indexed citations

Ohira, K.. (2011). Pressure drop reduction phenomenon of slush nitrogen flow in a horizontal pipe. Cryogenics. 51(7). 389–396. 26 indexed citations

10.

Ohira, K., et al.. (2008). Cavitation Instability in Subcooled Liquid Nitrogen Nozzle Flows. Journal of Fluid Science and Technology. 3(4). 500–511. 5 indexed citations

11.

YOSHIDA, Yoshiki, et al.. (2008). Thermodynamic Effect on Cavitation Performances and Cavitation Instabilities in an Inducer. Journal of Fluids Engineering. 130(11). 40 indexed citations

12.

Ohira, K.. (2006). Liquid and Slush Hydrogen: Its Application and Technology Development. TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan). 41(2). 61–72. 10 indexed citations

13.

Ohira, K., et al.. (2005). Low-threshold distributed reflector laser consisting of wide and narrow wirelike active regions. IEEE Photonics Technology Letters. 17(2). 264–266. 4 indexed citations

14.

Ohira, K., et al.. (2005). Low-threshold and high-efficiency operation of distributed reflector lasers with width-modulated wirelike active regions. IEEE Journal of Selected Topics in Quantum Electronics. 11(5). 1162–1168. 25 indexed citations

15.

Ohira, K.. (2004). A Summary of Liquid Hydrogen and Cryogenic Technologies in Japan’s WE-NET Project. AIP conference proceedings. 710. 27–34. 21 indexed citations

16.

Ohira, K., et al.. (2004). Low-threshold and high-efficiency operation of 1.5 µm distributed reflector laser with DFB grating and Q-wire DBR sections. Electronics Letters. 40(20). 1269–1270. 4 indexed citations

17.

Ohira, K., et al.. (2003). Development of a microwave-type densimeter for slush hydrogen. Cryogenics. 43(10-11). 615–620. 17 indexed citations

18.

Ohira, K., et al.. (2000). A Study of the Large Hydrogen Liquefaction Process. 38(5). 38–45. 8 indexed citations

19.

Nakaso, Noritaka, K. Ohira, M. Yanaka, & Yusuke Tsukahara. (1994). Measurement of acoustic reflection coefficients by an ultrasonic microspectrometer. IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control. 41(4). 494–502. 13 indexed citations

20.

Tsukahara, Yusuke, Noritaka Nakaso, & K. Ohira. (1991). Angular spectral approach to reflection of focused beams with oblique incidence in spherical-planar-pair lenses. IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control. 38(5). 468–480. 19 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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