This map shows the geographic impact of Takashi Oyabu'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 Takashi Oyabu with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Takashi Oyabu more than expected).
This network shows the impact of papers produced by Takashi Oyabu. 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 Takashi Oyabu. The network helps show where Takashi Oyabu may publish in the future.
Co-authorship network of co-authors of Takashi Oyabu
This figure shows the co-authorship network connecting the top 25 collaborators of Takashi Oyabu.
A scholar is included among the top collaborators of Takashi Oyabu 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 Takashi Oyabu. Takashi Oyabu is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Oyabu, Takashi, et al.. (2007). Purification characteristic of pothos for airborne contaminants according to growth conditions. 12(1). 29–34.
8.
Nambo, Hidetaka, et al.. (2006). Metrical Linguistic Analysis of English Materials for Tourism. IEICE Technical Report; IEICE Tech. Rep.. 106(166). 77–81.2 indexed citations
Nambo, Hidetaka, et al.. (2004). Relative Difficulty of Various English Writings by Fuzzy Reasoning and Its Application to Selecting Teaching Materials. Industrial Engineering & Management Systems. 3(1). 85–91.6 indexed citations
13.
Oyabu, Takashi, et al.. (2003). Metrical Comparison of English Textbooks in East Countries, the U.S.A. and U. K.. 한국지능시스템학회 국제학술대회 발표논문집. 508–512.2 indexed citations
Oyabu, Takashi, Takeshi Onodera, Haruhiko Kimura, & Teruaki Katsube. (2000). Characteristics of tin oxide gas sensors for human vital signs during sleep. Sensors and Materials. 12(1). 25–34.2 indexed citations
16.
Oyabu, Takashi, et al.. (1999). Odor sensing characteristics in residential space using metal-oxide sensors. Sensors and Materials. 11(8). 457–468.2 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.