Umpei Nagashima
- Atomic and Molecular Physics, and Optics top 1%
- Physical and Theoretical Chemistry top 0.2%
- Materials Chemistry top 5%
- Spectroscopy top 0.5%
- Organic Chemistry top 2%
- Co-authors
- Shin‐ichi NagaokaTakayoshi IshimotoMasanori TachikawaTsuneo HiranoNobuyuki NishiHiroki OshioMasaaki KawataMasaaki Baba
- Topics
- Advanced Chemical Physics Studies (101 papers)Spectroscopy and Quantum Chemical Studies (43 papers)Photochemistry and Electron Transfer Studies (38 papers)
In The Last Decade
Umpei Nagashima
263 papers receiving 5.2k citations
Peers
Comparison fields: 5 of 137
- Atomic and Molecular Physics, and Optics 2.5k
- Physical and Theoretical Chemistry 1.4k
- Materials Chemistry 1.3k
- Spectroscopy 1.3k
- Organic Chemistry 1.1k
Countries citing papers authored by Umpei Nagashima
This map shows the geographic impact of Umpei Nagashima'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 Umpei Nagashima with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Umpei Nagashima more than expected).
Fields of papers citing papers by Umpei Nagashima
This network shows the impact of papers produced by Umpei Nagashima. 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 Umpei Nagashima. The network helps show where Umpei Nagashima may publish in the future.
Co-authorship network of co-authors of Umpei Nagashima
This figure shows the co-authorship network connecting the top 25 collaborators of Umpei Nagashima. A scholar is included among the top collaborators of Umpei Nagashima 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 Umpei Nagashima. Umpei Nagashima is excluded from the visualization to improve readability, since they are connected to all nodes in the network.
All Works
| # | Work | Indexed citations |
|---|---|---|
| 1 | 5 | |
| 2 | 1 | |
| 3 | 0 | |
| 4 | 3 | |
| 5 | 1 | |
| 6 | 1 | |
| 7 | 1 | |
| 8 | 5 | |
| 9 | Theoretical studies for molecular modeling of new camptothecin analogues | 2 |
| 10 | 2 | |
| 11 | Comparison with Water Quality of main Rivers in the world, based on OECD reports | 1 |
| 12 | Development of a Simplified Eddy Current Tester Specialized in Non-Iron Metals | 3 |
| 13 | Neural network analysis of water pollution for a main river, Tamagawa, in Tokyo metropolis | 2 |
| 14 | A new learning algorithm for incomplete data sets and multi-layer neural networks | 2 |
| 15 | Quantum Chemistry Grid/Gaussian Portal Phase2 | 1 |
| 16 | Inverse optimization problem solver on use of multi-layer neural networks | 0 |
| 17 | A neural network solver for differential equations | 2 |
| 18 | 1 | |
| 19 | The Architecture of a Molecular Orbital calculation Engine (MOE) | 1 |
| 20 | .ALPHA.-Nitronyl Nitroxide Cation Radicals. | 3 |
About Umpei Nagashima
Umpei Nagashima is a scholar working on Physical and Theoretical Chemistry, Spectroscopy and Atomic and Molecular Physics, and Optics, having authored 290 papers that have together received 5.4k indexed citations. Recurring topics across this work include Advanced Chemical Physics Studies (101 papers), Spectroscopy and Quantum Chemical Studies (43 papers) and Photochemistry and Electron Transfer Studies (38 papers). The work is most often cited by research in Physical and Theoretical Chemistry (1.4k citations), Atomic and Molecular Physics, and Optics (2.5k citations) and Spectroscopy (1.3k citations). Umpei Nagashima has collaborated with scholars based in Japan, Germany and China. Frequent co-authors include Shin‐ichi Nagaoka, Takayoshi Ishimoto, Masanori Tachikawa, Tsuneo Hirano, Nobuyuki Nishi, Hiroki Oshio, Masaaki Kawata, Masaaki Baba, Kazuo Mukai and Hisanori Shinohara. Their work appears in journals such as Journal of the American Chemical Society, The Journal of Chemical Physics and Bioinformatics.
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.