{"id":"https://openalex.org/A5061247746","orcid":"https://orcid.org/0000-0002-1506-9727","observed_orcids":["https://orcid.org/0000-0002-1506-9727"],"display_name":"Efstratios Gallopoulos","raw_author_names":["E Gallopoulos","E. GALLOPOULOS","E. Gallopoulos","E.J. Gallopoulos","Efstratios Gallopoulos","Gallopoulos Efstratios","Gallopoulos, Efstratios"],"full_name":"Gallopoulos, Efstratios","works_count":142,"cited_by_count":3058,"summary_stats":{"2yr_mean_citedness":0.3333333333333333,"h_index":23,"i10_index":36},"ids":{"openalex":"https://openalex.org/A5061247746","orcid":"https://orcid.org/0000-0002-1506-9727","observed_orcids":["https://orcid.org/0000-0002-1506-9727"]},"affiliations":[{"institution":{"id":"https://openalex.org/I1280536761","ror":"https://ror.org/02acart68","display_name":"Ames Research Center","country_code":"US","type":"facility","lineage":["https://openalex.org/I1280536761","https://openalex.org/I4210124779"]},"years":[1989]},{"institution":{"id":"https://openalex.org/I130701444","ror":"https://ror.org/01zkghx44","display_name":"Georgia Institute of Technology","country_code":"US","type":"education","lineage":["https://openalex.org/I130701444"]},"years":[2007]},{"institution":{"id":"https://openalex.org/I143663144","ror":"https://ror.org/022qmyy53","display_name":"Research Institute for Advanced Computer Science","country_code":"US","type":"facility","lineage":["https://openalex.org/I1329765538","https://openalex.org/I143663144"]},"years":[1989]},{"institution":{"id":"https://openalex.org/I154570441","ror":"https://ror.org/02t274463","display_name":"University of California, Santa Barbara","country_code":"US","type":"education","lineage":["https://openalex.org/I154570441"]},"years":[1990,1985]},{"institution":{"id":"https://openalex.org/I157725225","ror":"https://ror.org/047426m28","display_name":"University of Illinois Urbana-Champaign","country_code":"US","type":"education","lineage":["https://openalex.org/I157725225"]},"years":[1996,1995,1994,1992,1991,1990,1989,1988]},{"institution":{"id":"https://openalex.org/I174878644","ror":"https://ror.org/017wvtq80","display_name":"University of Patras","country_code":"GR","type":"education","lineage":["https://openalex.org/I174878644"]},"years":[2026,2025,2023,2022,2021,2020,2019,2018,2016,2015,2013,2012,2011,2010,2008,2007,2006,2005,2004,2003,2002,2001,2000,1999,1997,1996]},{"institution":{"id":"https://openalex.org/I2801919071","ror":"https://ror.org/05e94g991","display_name":"University of Illinois System","country_code":"US","type":"education","lineage":["https://openalex.org/I2801919071"]},"years":[1994,1990]},{"institution":{"id":"https://openalex.org/I32597200","ror":"https://ror.org/00cv9y106","display_name":"Ghent University","country_code":"BE","type":"education","lineage":["https://openalex.org/I32597200"]},"years":[2007]},{"institution":{"id":"https://openalex.org/I4210124779","ror":"https://ror.org/027ka1x80","display_name":"National Aeronautics and Space Administration","country_code":"US","type":"government","lineage":["https://openalex.org/I4210124779"]},"years":[1989]},{"institution":{"id":"https://openalex.org/I99464096","ror":"https://ror.org/05f950310","display_name":"KU Leuven","country_code":"BE","type":"education","lineage":["https://openalex.org/I99464096"]},"years":[2007]}],"last_known_institutions":[{"id":"https://openalex.org/I174878644","ror":"https://ror.org/017wvtq80","display_name":"University of Patras","country_code":"GR","type":"education","lineage":["https://openalex.org/I174878644"]}],"topics":[{"id":"https://openalex.org/T10792","display_name":"Matrix Theory and Algorithms","count":72,"subfield":{"id":"https://openalex.org/subfields/1703","display_name":"Computational Theory and Mathematics"},"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/T10054","display_name":"Parallel Computing and Optimization Techniques","count":68,"subfield":{"id":"https://openalex.org/subfields/1708","display_name":"Hardware and Architecture"},"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/T10715","display_name":"Distributed and Parallel Computing Systems","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/T10339","display_name":"Advanced Numerical Methods in Computational Mathematics","count":22,"subfield":{"id":"https://openalex.org/subfields/2206","display_name":"Computational Mechanics"},"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/T10481","display_name":"Computer Graphics and Visualization Techniques","count":15,"subfield":{"id":"https://openalex.org/subfields/1704","display_name":"Computer Graphics and Computer-Aided Design"},"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/T10792","display_name":"Matrix Theory and Algorithms","value":0.0002648,"subfield":{"id":"https://openalex.org/subfields/1703","display_name":"Computational Theory and Mathematics"},"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/T12661","display_name":"Iterative Methods for Nonlinear Equations","value":0.0002044,"subfield":{"id":"https://openalex.org/subfields/2612","display_name":"Numerical Analysis"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11697","display_name":"Numerical Methods and Algorithms","value":0.0001693,"subfield":{"id":"https://openalex.org/subfields/1703","display_name":"Computational Theory and Mathematics"},"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/T10054","display_name":"Parallel Computing and Optimization Techniques","value":0.0001211,"subfield":{"id":"https://openalex.org/subfields/1708","display_name":"Hardware and Architecture"},"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/T10715","display_name":"Distributed and Parallel Computing Systems","value":8.86e-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":0.9122527241706848},{"id":"33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","score":0.8984534740447998},{"id":"173608175","wikidata":"https://www.wikidata.org/wiki/Q232661","display_name":"Parallel computing","score":0.7293999791145325},{"id":"11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","score":0.6393777132034302},{"id":"121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","score":0.29980000853538513}],"counts_by_year":[{"year":1983,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1985,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1987,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":1988,"works_count":2,"oa_works_count":2,"cited_by_count":0},{"year":1989,"works_count":8,"oa_works_count":2,"cited_by_count":0},{"year":1990,"works_count":3,"oa_works_count":1,"cited_by_count":0},{"year":1991,"works_count":4,"oa_works_count":2,"cited_by_count":0},{"year":1992,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":1993,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1994,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1995,"works_count":6,"oa_works_count":2,"cited_by_count":0},{"year":1996,"works_count":4,"oa_works_count":3,"cited_by_count":0},{"year":1997,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1998,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1999,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2000,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":2001,"works_count":4,"oa_works_count":2,"cited_by_count":0},{"year":2002,"works_count":4,"oa_works_count":1,"cited_by_count":0},{"year":2003,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2004,"works_count":2,"oa_works_count":2,"cited_by_count":0},{"year":2005,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":2006,"works_count":10,"oa_works_count":3,"cited_by_count":0},{"year":2007,"works_count":6,"oa_works_count":2,"cited_by_count":0},{"year":2008,"works_count":3,"oa_works_count":1,"cited_by_count":0},{"year":2009,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2010,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":2011,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":2012,"works_count":5,"oa_works_count":1,"cited_by_count":84},{"year":2013,"works_count":3,"oa_works_count":0,"cited_by_count":103},{"year":2014,"works_count":0,"oa_works_count":0,"cited_by_count":125},{"year":2015,"works_count":16,"oa_works_count":0,"cited_by_count":120},{"year":2016,"works_count":3,"oa_works_count":1,"cited_by_count":134},{"year":2017,"works_count":2,"oa_works_count":0,"cited_by_count":128},{"year":2018,"works_count":3,"oa_works_count":1,"cited_by_count":141},{"year":2019,"works_count":1,"oa_works_count":0,"cited_by_count":139},{"year":2020,"works_count":1,"oa_works_count":1,"cited_by_count":141},{"year":2021,"works_count":1,"oa_works_count":1,"cited_by_count":165},{"year":2022,"works_count":1,"oa_works_count":1,"cited_by_count":109},{"year":2023,"works_count":1,"oa_works_count":1,"cited_by_count":98},{"year":2024,"works_count":0,"oa_works_count":0,"cited_by_count":105},{"year":2025,"works_count":1,"oa_works_count":0,"cited_by_count":112},{"year":2026,"works_count":2,"oa_works_count":2,"cited_by_count":95}],"display_name_alternatives":["E Gallopoulos","E. GALLOPOULOS","E. Gallopoulos","E.J. Gallopoulos","Efstratios Gallopoulos","Gallopoulos Efstratios","Gallopoulos, Efstratios"],"block_key":"e gallopoulos","works_api_url":"https://api.openalex.org/works?filter=author.id:A5061247746","awards_count":3,"awards_api_url":"https://api.openalex.org/awards?filter=investigators.author.id:A5061247746","updated_date":"2026-11-13T15:08:24","created_date":"2016-06-24T00:00:00"}