Hiroshi Koyama
- Astronomy and Astrophysics top 5%
- Astrophysics and Star Formation Studies 10
- Atmospheric Science top 10%
- Global and Planetary Change top 10%
- Climate variability and models 7
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- Semiconductor materials and devices 20
- Integrated Circuits and Semiconductor Failure Analysis 15
- Advancements in Semiconductor Devices and Circuit Design 6
- Silicon and Solar Cell Technologies 5
- Surfaces, Coatings and Films top 10%
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- High voltage insulation and dielectric phenomena 7
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- Water Systems and Optimization 6
Hiroshi Koyama
87 papers receiving 1.3k citations
Peers
Comparison fields: 5 of 127
- Astronomy and Astrophysics 249
- Atmospheric Science 139
- Global and Planetary Change 141
- Electrical and Electronic Engineering 365
- Surfaces, Coatings and Films 41
Countries citing papers authored by Hiroshi Koyama
This map shows the geographic impact of Hiroshi Koyama'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 Hiroshi Koyama with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Hiroshi Koyama more than expected).
Fields of papers citing papers by Hiroshi Koyama
This network shows the impact of papers produced by Hiroshi Koyama. 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 Hiroshi Koyama. The network helps show where Hiroshi Koyama may publish in the future.
Co-authorship network
The 25 scholars most cited alongside Hiroshi Koyama, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.
All Works
| # | Work | ||
|---|---|---|---|
| 1 | 2024 | 2 | |
| 2 | 2023 | 26 | |
| 3 | 2020 | 2 | |
| 4 | 2018 | 11 | |
| 5 | 2014 | 24 | |
| 6 | 2013 | 16 | |
| 7 | 2012 | 28 | |
| 8 | 2009 | 7 | |
| 9 | 2008 | 15 | |
| 10 | Dynamics of a Multi-Phase Interstellar Medium | 2007 | 2 |
| 11 | 2007 | 45 | |
| 12 | 2005 | 3 | |
| 13 | 2003 | 3 | |
| 14 | 2003 | 13 | |
| 15 | 1998 | 9 | |
| 16 | Comparison of Percutaneous Transhepatic Protograms obtained before and after Eradicative Endoscopic Variceal Ligation of Esophageal Varices. | 1997 | 1 |
| 17 | 1992 | 21 | |
| 18 | 1991 | 2 | |
| 19 | 1987 | 7 | |
| 20 | 1976 | 2 |
About Hiroshi Koyama
Hiroshi Koyama is a scholar working on Astronomy and Astrophysics, Electrical and Electronic Engineering and Surfaces, Coatings and Films, having authored 90 papers that have together received 1.4k indexed citations. Recurring topics across this work include Semiconductor materials and devices (20 papers), Integrated Circuits and Semiconductor Failure Analysis (15 papers), Astrophysics and Star Formation Studies (10 papers), Climate variability and models (7 papers), High voltage insulation and dielectric phenomena (7 papers), Advancements in Semiconductor Devices and Circuit Design (6 papers), Water Systems and Optimization (6 papers) and Silicon and Solar Cell Technologies (5 papers). The work is most often cited by research in Astronomy and Astrophysics (249 citations), Atmospheric Science (139 citations) and Global and Planetary Change (141 citations). Hiroshi Koyama has collaborated with scholars based in Japan, United States and Germany. Frequent co-authors include Shu‐ichiro Inutsuka, Eve C. Ostriker, DM Geddes, Tomikichi Wada, Satoshi Naito, Kaoru Yoshida, Masahiro Watanabe, Kazuhisa Sekimizu, Takahiro Ito and Toshiyuki Nakanishi. Their work appears in journals such as Journal of Applied Physics, The Astrophysical Journal, Genes to Cells, Solid-State Electronics and Journal of the Meteorological Society of Japan Ser II.
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.