This map shows the geographic impact of K.‐I. Oyama'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.‐I. Oyama with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites K.‐I. Oyama more than expected).
This network shows the impact of papers produced by K.‐I. Oyama. 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.‐I. Oyama. The network helps show where K.‐I. Oyama may publish in the future.
Co-authorship network of co-authors of K.‐I. Oyama
This figure shows the co-authorship network connecting the top 25 collaborators of K.‐I. Oyama.
A scholar is included among the top collaborators of K.‐I. Oyama 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.‐I. Oyama. K.‐I. Oyama is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Imamura, Teruhiko, Takahiro Iwata, K.‐I. Oyama, et al.. (2008). INITIAL RESULTS OF THE LUNAR IONOSPHERE OBSERVATION WITH SELENE RADIO SCIENCE.. Lunar and Planetary Science Conference. 1659.3 indexed citations
7.
Fujii, Hironori, K.‐I. Oyama, Susumu Sasaki, et al.. (2005). A proposed bare tether experiment on board a sounding rocket. Archivo Digital UPM (Universidad Politécnica de Madrid).1 indexed citations
8.
Abe, Takumi, Junichi Kurihara, K.‐I. Oyama, et al.. (2005). Coordinated Rocket and Ground-based Observations of Neutral Temperature during the Dynamics and Energetics of the Lower Thermosphere in Aurora (DELTA) Campaign. AGUFM. 2005.1 indexed citations
Oyama, K.‐I. & Shigeto Watanabe. (2004). Effects of zonal and meridional neutral winds on the electron density and temperature at the height of 600 km. JAXA Repository (JAXA). 3. 1–14.4 indexed citations
11.
Rawer, K., D. Bilitza, B. W. Reinisch, L. Třı́sková, & K.‐I. Oyama. (2002). The URSI/COSPAR Standard for the Ionosphere: International Reference Ionosphere. 34. 1267.2 indexed citations
12.
Oyama, K.‐I., et al.. (1992). Feasibility study of a tethered satellite system. 1851–1858.2 indexed citations
Oyama, K.‐I. & K. Schlegel. (1988). Observation of electron temperature anisotropy in the ionosphere: A review. Annales Geophysicae. 6. 389–400.22 indexed citations
Schlegel, K. & K.‐I. Oyama. (1987). Remote and in-situ plasma measurements during the CAESAR flight. MPG.PuRe (Max Planck Society). 270. 315–318.4 indexed citations
17.
Kojima, Masayoshi, et al.. (1987). Solar Wind Structure Observed by Interplanetary Scintillation and Spacecraft in 1985 and 1986. 34(34). 9–21.2 indexed citations
Oyama, K.‐I., et al.. (1981). Gross Features of Electron Temperature Profile of Polar Ionosphere. Memoirs of National Institute of Polar Research. Special issue. 18(18). 330–334.3 indexed citations
20.
Oyama, K.‐I.. (1975). Characteristic of the Contaminated Langmuir Probe and Countermoves for its Application to the Space Observations. JAXA Repository (JAXA). 40(5). 27347–188.3 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.