{"id":"https://openalex.org/A5071394015","orcid":"https://orcid.org/0000-0003-2512-2584","observed_orcids":["https://orcid.org/0000-0003-2512-2584"],"display_name":"Keiichi Shima","raw_author_names":["K. Shima","Keiichi SHIMA","Keiichi Shima","Shima, Keiichi"],"full_name":"Shima, Keiichi","works_count":53,"cited_by_count":360,"summary_stats":{"2yr_mean_citedness":2.0,"h_index":9,"i10_index":9},"ids":{"openalex":"https://openalex.org/A5071394015","orcid":"https://orcid.org/0000-0003-2512-2584","observed_orcids":["https://orcid.org/0000-0003-2512-2584"]},"affiliations":[{"institution":{"id":"https://openalex.org/I29770179","ror":"https://ror.org/02w42ss30","display_name":"Budapest University of Technology and Economics","country_code":"HU","type":"education","lineage":["https://openalex.org/I29770179"]},"years":[2023]},{"institution":{"id":"https://openalex.org/I4210120159","ror":"https://ror.org/02ew2ks20","display_name":"SoftBank Group (Japan)","country_code":"JP","type":"company","lineage":["https://openalex.org/I4210120159"]},"years":[2026,2025,2024,2023]},{"institution":{"id":"https://openalex.org/I4210145792","ror":"https://ror.org/05e0dm506","display_name":"IIJ Research Laboratory","country_code":"JP","type":"facility","lineage":["https://openalex.org/I4210145792"]},"years":[2021,2020,2019,2017,2015,2013]},{"institution":{"id":"https://openalex.org/I4387153849","ror":"https://ror.org/05c4bsk60","display_name":"Internet Initiative Japan","country_code":"JP","type":"company","lineage":["https://openalex.org/I4210145792","https://openalex.org/I4387153849"]},"years":[2021,2020,2019,2017,2015,2013,2010,2009,2008,2007,2006]},{"institution":{"id":"https://openalex.org/I4405275268","ror":"https://ror.org/038vabw28","display_name":"SoftBank Corp. (Japan)","country_code":"JP","type":"company","lineage":["https://openalex.org/I4405275268"]},"years":[2026,2025,2024,2023]},{"institution":{"id":"https://openalex.org/I75917431","ror":"https://ror.org/05bhada84","display_name":"Nara Institute of Science and Technology","country_code":"JP","type":"education","lineage":["https://openalex.org/I75917431"]},"years":[2008]},{"institution":{"id":"https://openalex.org/I83579964","ror":"https://ror.org/04091f946","display_name":"Sz\u00e9chenyi Istv\u00e1n University","country_code":"HU","type":"education","lineage":["https://openalex.org/I83579964"]},"years":[2023]}],"last_known_institutions":[{"id":"https://openalex.org/I4210120159","ror":"https://ror.org/02ew2ks20","display_name":"SoftBank Group (Japan)","country_code":"JP","type":"company","lineage":["https://openalex.org/I4210120159"]},{"id":"https://openalex.org/I4405275268","ror":"https://ror.org/038vabw28","display_name":"SoftBank Corp. (Japan)","country_code":"JP","type":"company","lineage":["https://openalex.org/I4405275268"]}],"topics":[{"id":"https://openalex.org/T10651","display_name":"IPv6, Mobility, Handover, Networks, Security","count":35,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10138","display_name":"Network Traffic and Congestion Control","count":29,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10714","display_name":"Software-Defined Networks and 5G","count":17,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10246","display_name":"Mobile Ad Hoc Networks","count":14,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12127","display_name":"Software System Performance and Reliability","count":6,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"topic_share":[{"id":"https://openalex.org/T10651","display_name":"IPv6, Mobility, Handover, Networks, Security","value":0.0002957,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10714","display_name":"Software-Defined Networks and 5G","value":8.18e-05,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10138","display_name":"Network Traffic and Congestion Control","value":7.13e-05,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T14250","display_name":"Energy and Environmental Systems","value":7.05e-05,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10246","display_name":"Mobile Ad Hoc Networks","value":5.89e-05,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"x_concepts":[{"id":"41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","score":0.8843913078308105},{"id":"84555802","wikidata":"https://www.wikidata.org/wiki/Q2551624","display_name":"IPv6","score":0.8677084445953369},{"id":"31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","score":0.8187738656997681},{"id":"111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","score":0.7295444011688232},{"id":"110875604","wikidata":"https://www.wikidata.org/wiki/Q75","display_name":"The Internet","score":0.696348249912262}],"counts_by_year":[{"year":2006,"works_count":13,"oa_works_count":0,"cited_by_count":0},{"year":2007,"works_count":8,"oa_works_count":0,"cited_by_count":0},{"year":2008,"works_count":4,"oa_works_count":1,"cited_by_count":0},{"year":2009,"works_count":4,"oa_works_count":2,"cited_by_count":0},{"year":2010,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2012,"works_count":1,"oa_works_count":1,"cited_by_count":14},{"year":2013,"works_count":2,"oa_works_count":0,"cited_by_count":7},{"year":2014,"works_count":0,"oa_works_count":0,"cited_by_count":4},{"year":2015,"works_count":1,"oa_works_count":0,"cited_by_count":8},{"year":2016,"works_count":1,"oa_works_count":1,"cited_by_count":3},{"year":2017,"works_count":1,"oa_works_count":0,"cited_by_count":4},{"year":2018,"works_count":1,"oa_works_count":0,"cited_by_count":3},{"year":2019,"works_count":2,"oa_works_count":1,"cited_by_count":6},{"year":2020,"works_count":3,"oa_works_count":2,"cited_by_count":28},{"year":2021,"works_count":3,"oa_works_count":3,"cited_by_count":34},{"year":2022,"works_count":1,"oa_works_count":0,"cited_by_count":31},{"year":2023,"works_count":3,"oa_works_count":2,"cited_by_count":38},{"year":2024,"works_count":1,"oa_works_count":0,"cited_by_count":53},{"year":2025,"works_count":2,"oa_works_count":2,"cited_by_count":33},{"year":2026,"works_count":1,"oa_works_count":1,"cited_by_count":37}],"display_name_alternatives":["K. Shima","Keiichi SHIMA","Keiichi Shima","Shima, Keiichi"],"block_key":"k shima","works_api_url":"https://api.openalex.org/works?filter=author.id:A5071394015","awards_count":0,"awards_api_url":"https://api.openalex.org/awards?filter=investigators.author.id:A5071394015","updated_date":"2026-11-13T15:08:24","created_date":"2016-06-24T00:00:00"}