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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Materials Science 66 5383 5206 260 254 554 14975

Akira Kohyama publications per year

The chart shows the history of publications by Akira Kohyama between 1971 and 2021, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Akira Kohyama published across 51 years, from 1971 to 2021, averaging 11 papers a year. Output peaked at 45 publications in 2002. 1 of the 560 publications appeared in the last two years.

No. of publications
10 20 30 40
Bar chart. Horizontal axis: year, 1971 to 2021. Vertical axis: number of publications, 0 to 45. Peak 45 publications in 2002. 1971: 1 publication 1972: 0 publications 1973: 0 publications 1974: 0 publications 1975: 0 publications 1976: 1 publication 1977: 0 publications 1978: 0 publications 1979: 5 publications 1980: 0 publications 1981: 4 publications 1982: 1 publication 1983: 1 publication 1984: 6 publications 1985: 3 publications 1986: 7 publications 1987: 1 publication 1988: 8 publications 1989: 2 publications 1990: 3 publications 1991: 6 publications 1992: 17 publications 1993: 9 publications 1994: 16 publications 1995: 4 publications 1996: 11 publications 1997: 8 publications 1998: 22 publications 1999: 9 publications 2000: 22 publications 2001: 19 publications 2002: 45 publications 2003: 28 publications 2004: 34 publications 2005: 32 publications 2006: 22 publications 2007: 33 publications 2008: 44 publications 2009: 24 publications 2010: 17 publications 2011: 32 publications 2012: 17 publications 2013: 8 publications 2014: 15 publications 2015: 4 publications 2016: 11 publications 2017: 4 publications 2018: 2 publications 2019: 1 publication 2020: 0 publications 2021: 1 publication
1971 2021

560 publications in total across all disciplines

View publications per year as a table
Akira Kohyama: publications per year, 1971 to 2021
Year Publications
1971 1
1972 0
1973 0
1974 0
1975 0
1976 1
1977 0
1978 0
1979 5
1980 0
1981 4
1982 1
1983 1
1984 6
1985 3
1986 7
1987 1
1988 8
1989 2
1990 3
1991 6
1992 17
1993 9
1994 16
1995 4
1996 11
1997 8
1998 22
1999 9
2000 22
2001 19
2002 45
2003 28
2004 34
2005 32
2006 22
2007 33
2008 44
2009 24
2010 17
2011 32
2012 17
2013 8
2014 15
2015 4
2016 11
2017 4
2018 2
2019 1
2020 0
2021 1
Total 560
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Akira Kohyama publication distribution in Materials Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Materials Science in 2026. The highlighted bar marks where Akira Kohyama sits on this spectrum.

No. of scientists
200 400 600 800
Bar chart with 57 bars. Horizontal axis: publications, 50–69 to 1,163+. Vertical axis: number of scientists, 0 to 891. Most scientists, 891, have 190–209 publications. The last bar groups every scientist with 1,163 publications or more. The highlighted bar, 550–569 publications, is where this scientist sits. 50–69 publications: 28 scientists 70–89 publications: 152 scientists 90–109 publications: 356 scientists 110–129 publications: 487 scientists 130–149 publications: 723 scientists 150–169 publications: 835 scientists 170–189 publications: 850 scientists 190–209 publications: 891 scientists 210–229 publications: 862 scientists 230–249 publications: 766 scientists 250–269 publications: 726 scientists 270–289 publications: 665 scientists 290–309 publications: 593 scientists 310–329 publications: 537 scientists 330–349 publications: 477 scientists 350–369 publications: 440 scientists 370–389 publications: 356 scientists 390–409 publications: 321 scientists 410–429 publications: 256 scientists 430–449 publications: 246 scientists 450–469 publications: 216 scientists 470–489 publications: 212 scientists 490–509 publications: 174 scientists 510–529 publications: 194 scientists 530–549 publications: 162 scientists 550–569 publications: 131 scientists 570–589 publications: 111 scientists 590–609 publications: 103 scientists 610–629 publications: 99 scientists 630–649 publications: 77 scientists 650–669 publications: 92 scientists 670–689 publications: 56 scientists 690–709 publications: 53 scientists 710–729 publications: 53 scientists 730–749 publications: 38 scientists 750–769 publications: 52 scientists 770–789 publications: 43 scientists 790–809 publications: 38 scientists 810–829 publications: 34 scientists 830–849 publications: 25 scientists 850–869 publications: 18 scientists 870–889 publications: 20 scientists 890–909 publications: 24 scientists 910–929 publications: 27 scientists 930–949 publications: 20 scientists 950–969 publications: 17 scientists 970–989 publications: 10 scientists 990–1,009 publications: 16 scientists 1,010–1,029 publications: 13 scientists 1,030–1,049 publications: 12 scientists 1,050–1,069 publications: 9 scientists 1,070–1,089 publications: 8 scientists 1,090–1,109 publications: 7 scientists 1,110–1,129 publications: 9 scientists 1,130–1,149 publications: 2 scientists 1,150–1,162 publications: 5 scientists 1,163+ publications: 100 scientists
50–69 publications 1,163+

This scientist: 554 publications — 90th percentile

90% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,163 publications or more.

View publications distribution as a table
Number of Materials Science scientists by publication count, Research.com 2026 ranking edition. Based on 12,847 ranked scientists.
Publications Scientists This scientist
50–69 28
70–89 152
90–109 356
110–129 487
130–149 723
150–169 835
170–189 850
190–209 891
210–229 862
230–249 766
250–269 726
270–289 665
290–309 593
310–329 537
330–349 477
350–369 440
370–389 356
390–409 321
410–429 256
430–449 246
450–469 216
470–489 212
490–509 174
510–529 194
530–549 162
550–569 131 554
570–589 111
590–609 103
610–629 99
630–649 77
650–669 92
670–689 56
690–709 53
710–729 53
730–749 38
750–769 52
770–789 43
790–809 38
810–829 34
830–849 25
850–869 18
870–889 20
890–909 24
910–929 27
930–949 20
950–969 17
970–989 10
990–1,009 16
1,010–1,029 13
1,030–1,049 12
1,050–1,069 9
1,070–1,089 8
1,090–1,109 7
1,110–1,129 9
1,130–1,149 2
1,150–1,162 5
1,163+ 100
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Akira Kohyama D-index placement in Materials Science in 2026

The chart shows the D-index (discipline H-index) distribution of Materials Science scientists ranked by Research.com in 2026. The highlighted bar marks where Akira Kohyama sits on this spectrum.

No. of scientists
200 400 600
Bar chart with 64 bars. Horizontal axis: D-Index, 40–41 to 165+. Vertical axis: number of scientists, 0 to 667. Most scientists, 667, have 52–53 D-Index. The last bar groups every scientist with 165 D-Index or more. The highlighted bar, 66–67 D-Index, is where this scientist sits. 40–41 D-Index: 211 scientists 42–43 D-Index: 450 scientists 44–45 D-Index: 612 scientists 46–47 D-Index: 612 scientists 48–49 D-Index: 598 scientists 50–51 D-Index: 657 scientists 52–53 D-Index: 667 scientists 54–55 D-Index: 621 scientists 56–57 D-Index: 597 scientists 58–59 D-Index: 610 scientists 60–61 D-Index: 587 scientists 62–63 D-Index: 606 scientists 64–65 D-Index: 533 scientists 66–67 D-Index: 490 scientists 68–69 D-Index: 469 scientists 70–71 D-Index: 378 scientists 72–73 D-Index: 421 scientists 74–75 D-Index: 359 scientists 76–77 D-Index: 323 scientists 78–79 D-Index: 299 scientists 80–81 D-Index: 230 scientists 82–83 D-Index: 210 scientists 84–85 D-Index: 195 scientists 86–87 D-Index: 203 scientists 88–89 D-Index: 175 scientists 90–91 D-Index: 175 scientists 92–93 D-Index: 142 scientists 94–95 D-Index: 121 scientists 96–97 D-Index: 117 scientists 98–99 D-Index: 107 scientists 100–101 D-Index: 88 scientists 102–103 D-Index: 85 scientists 104–105 D-Index: 68 scientists 106–107 D-Index: 62 scientists 108–109 D-Index: 57 scientists 110–111 D-Index: 45 scientists 112–113 D-Index: 49 scientists 114–115 D-Index: 50 scientists 116–117 D-Index: 34 scientists 118–119 D-Index: 38 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 29 scientists 124–125 D-Index: 28 scientists 126–127 D-Index: 24 scientists 128–129 D-Index: 33 scientists 130–131 D-Index: 28 scientists 132–133 D-Index: 21 scientists 134–135 D-Index: 20 scientists 136–137 D-Index: 23 scientists 138–139 D-Index: 17 scientists 140–141 D-Index: 12 scientists 142–143 D-Index: 17 scientists 144–145 D-Index: 21 scientists 146–147 D-Index: 13 scientists 148–149 D-Index: 11 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 13 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 4 scientists 162–163 D-Index: 4 scientists 164 D-Index: 3 scientists 165+ D-Index: 98 scientists
40–41 D-Index 165+

This scientist: 66 D-Index — 59th percentile

59% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 165 D-Index or more.

View D-Index distribution as a table
Number of Materials Science scientists by D-index, Research.com 2026 ranking edition. Based on 12,847 ranked scientists.
D-Index Scientists This scientist
40–41 211
42–43 450
44–45 612
46–47 612
48–49 598
50–51 657
52–53 667
54–55 621
56–57 597
58–59 610
60–61 587
62–63 606
64–65 533
66–67 490 66
68–69 469
70–71 378
72–73 421
74–75 359
76–77 323
78–79 299
80–81 230
82–83 210
84–85 195
86–87 203
88–89 175
90–91 175
92–93 142
94–95 121
96–97 117
98–99 107
100–101 88
102–103 85
104–105 68
106–107 62
108–109 57
110–111 45
112–113 49
114–115 50
116–117 34
118–119 38
120–121 37
122–123 29
124–125 28
126–127 24
128–129 33
130–131 28
132–133 21
134–135 20
136–137 23
138–139 17
140–141 12
142–143 17
144–145 21
146–147 13
148–149 11
150–151 14
152–153 13
154–155 9
156–157 10
158–159 7
160–161 4
162–163 4
164 3
165+ 98
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Overview

Akira Kohyama is affiliated with the Muroran Institute of Technology in Japan. Their research primarily spans the fields of Medicine and Health Professions, with particular focus on subfields such as Oncology, General Health Professions, Pulmonary and Respiratory Medicine, and Gender Studies.

The scientist's recent publications address topics relevant to global surgical practices and challenges during the COVID-19 pandemic. Notable papers include:

  • "Surgeons' fear of getting infected by COVID19: A global survey" (2020, British journal of surgery)
  • "Impact of asymptomatic COVID-19 patients in global surgical practice during the COVID-19 pandemic" (2020, British journal of surgery)

Kohyama's research topics encompass:

  • COVID-19 and healthcare impacts
  • Healthcare professionals' stress and burnout
  • Infection Control and Ventilation
  • Healthcare cost, quality, practices
  • Diversity and Career in Medicine

Co-authorship collaborations include:

  • Yongbo An
  • Vittoria Bellato
  • Tsuyoshi Konishi
  • Gianluca Pellino
  • Bruno Sensi

The British journal of surgery is the primary venue where Kohyama's work has been published, indicating a focus on surgical and clinical implications within their research.

Best Publications

  • Low-activation ferritic and martensitic steels for fusion application

    A. Kohyama;A. Hishinuma;D.S. Gelles;R.L. Klueh

  • Current status and critical issues for development of SiC composites for fusion applications

    Yutai Katoh;Lance L. Snead;Charles H. Henager;A. Hasegawa

  • Single-Crystal SiC Nanowires with a Thin Carbon Coating for Stronger and Tougher Ceramic Composites

    Wen Yang;Hiroshi Araki;Chengchun Tang;Somsri Thaveethavorn

  • Current status and future R&D for reduced-activation ferritic/martensitic steels

    A Hishinuma;A Kohyama;R.L Klueh;D.S Gelles

  • Promise and challenges of SiCf/SiC composites for fusion energy applications

    Russell H. Jones;L. Giancarli;Akira Hasegawa;Y. Katoh

  • Design and material issues for high performance SiCf/SiC-based fusion power cores

    A. R. Raffray;R. Jones;G. Aiello;M. Billone

  • Status of silicon carbide composites for fusion

    L.L Snead;R.H Jones;A Kohyama;P Fenici

  • Issues and advances in SiCf/SiC composites development for fusion reactors

    B Riccardi;L Giancarli;A Hasegawa;Y Katoh

  • Critical issues and current status of SiC/SiC composites for fusion

    A. Hasegawa;A. Kohyama;R.H. Jones;L.L. Snead

  • Development of an extensive database of mechanical and physical properties for reduced-activation martensitic steel F82H

    S Jitsukawa;M Tamura;B van der Schaaf;R.L Klueh

  • Current status of SiC/SiC composites R&D

    P. Fenici;A.J. Frias Rebelo;R.H. Jones;A. Kohyama

  • Microstructural development in cubic silicon carbide during irradiation at elevated temperatures

    Y. Katoh;N. Hashimoto;S. Kondo;L.L. Snead

  • SiC/SiC composites through transient eutectic-phase route for fusion applications

    Y Katoh;Y Katoh;A Kohyama;T Nozawa;M Sato

  • Status of R&D activities on materials for fusion power reactors

    N. Baluc;K. Abe;J. L. Boutard;V. M. Chernov

  • Preparation of SiC/SiC Composites by Hot Pressing, Using Tyranno-SA Fiber as Reinforcement

    Shaoming Dong;Yutai Katoh;Akira Kohyama

  • Influence of surface structure of SiC nano-sized powder analyzed by X-ray photoelectron spectroscopy on basic powder characteristics

    Kazuya Shimoda;Joon-Soo Park;Tatsuya Hinoki;Akira Kohyama

  • Recent results of the reduced activation ferritic/martensitic steel development

    S Jitsukawa;A Kimura;A Kohyama;R.L Klueh

  • Effect of geometrical parameters in micro-grooved crosshatch pattern under lubricated sliding friction

    Min-soo Suh;Young-hun Chae;Seock-sam Kim;Tatsuya Hinoki

  • Thermo-mechanical properties and microstructure of silicon carbide composites fabricated by nano-infiltrated transient eutectoid process

    Y Katoh;S.M Dong;A Kohyama

  • Recent advances and issues in development of silicon carbide composites for fusion applications

    T. Nozawa;T. Hinoki;A. Hasegawa;A. Kohyama

Frequent Co-Authors

Yutai Katoh
Yutai Katoh Oak Ridge National Laboratory
Akihiko Kimura
Akihiko Kimura Kyoto University
Ronald L. Klueh
Ronald L. Klueh Oak Ridge National Laboratory
Shigeharu Ukai
Shigeharu Ukai Hokkaido University
Edgar Lara-Curzio
Edgar Lara-Curzio Oak Ridge National Laboratory
Milena Salvo
Milena Salvo Polytechnic University of Turin
Ji-Jung Kai
Ji-Jung Kai City University of Hong Kong
G.R. Odette
G.R. Odette University of California, Santa Barbara
Steven J. Zinkle
Steven J. Zinkle University of Tennessee at Knoxville

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