{"id":"https://openalex.org/A5082400723","orcid":"https://orcid.org/0000-0002-0300-7094","observed_orcids":["https://orcid.org/0000-0002-0300-7094"],"display_name":"Rolan Siregar","raw_author_names":["R Siregar","Rolan Siregar","Siregar, Rolan"],"full_name":"Rolan Siregar","works_count":53,"cited_by_count":209,"summary_stats":{"2yr_mean_citedness":0.46153846153846156,"h_index":8,"i10_index":8},"ids":{"openalex":"https://openalex.org/A5082400723","orcid":"https://orcid.org/0000-0002-0300-7094","observed_orcids":["https://orcid.org/0000-0002-0300-7094"]},"affiliations":[{"institution":{"id":"https://openalex.org/I2799392579","ror":"https://ror.org/04v8qfb10","display_name":"Jakarta State Polytechnic","country_code":"ID","type":"education","lineage":["https://openalex.org/I2799392579"]},"years":[2017]},{"institution":{"id":"https://openalex.org/I29617571","ror":"https://ror.org/0116zj450","display_name":"University of Indonesia","country_code":"ID","type":"education","lineage":["https://openalex.org/I29617571"]},"years":[2024,2022,2021,2020,2019,2017]},{"institution":{"id":"https://openalex.org/I4210159144","ror":"https://ror.org/04k4re972","display_name":"Universitas Sisingamangaraja XII Tapanuli","country_code":"ID","type":"education","lineage":["https://openalex.org/I4210159144"]},"years":[2025,2022]},{"institution":{"id":"https://openalex.org/I4210159238","ror":"https://ror.org/04yntn793","display_name":"Universitas Darma Persada","country_code":"ID","type":"education","lineage":["https://openalex.org/I4210159238"]},"years":[2026,2025,2024,2023,2022,2021,2020,2019]}],"last_known_institutions":[{"id":"https://openalex.org/I4210159238","ror":"https://ror.org/04yntn793","display_name":"Universitas Darma Persada","country_code":"ID","type":"education","lineage":["https://openalex.org/I4210159238"]}],"topics":[{"id":"https://openalex.org/T10808","display_name":"Electric and Hybrid Vehicle Technologies","count":22,"subfield":{"id":"https://openalex.org/subfields/2203","display_name":"Automotive 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/T10805","display_name":"Vehicle Dynamics and Control Systems","count":14,"subfield":{"id":"https://openalex.org/subfields/2203","display_name":"Automotive 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/T14156","display_name":"Engineering Applied Research","count":13,"subfield":{"id":"https://openalex.org/subfields/2205","display_name":"Civil and Structural 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/T12197","display_name":"Brake Systems and Friction Analysis","count":11,"subfield":{"id":"https://openalex.org/subfields/2203","display_name":"Automotive 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/T10768","display_name":"Electric Vehicles and Infrastructure","count":6,"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"}}],"topic_share":[{"id":"https://openalex.org/T12197","display_name":"Brake Systems and Friction Analysis","value":0.0002654,"subfield":{"id":"https://openalex.org/subfields/2203","display_name":"Automotive 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/T10808","display_name":"Electric and Hybrid Vehicle Technologies","value":0.0001096,"subfield":{"id":"https://openalex.org/subfields/2203","display_name":"Automotive 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/T10805","display_name":"Vehicle Dynamics and Control Systems","value":6.04e-05,"subfield":{"id":"https://openalex.org/subfields/2203","display_name":"Automotive 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/T12907","display_name":"Mechanical Engineering and Vibrations Research","value":5.95e-05,"subfield":{"id":"https://openalex.org/subfields/2210","display_name":"Mechanical 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/T14225","display_name":"Advanced Sensor and Control Systems","value":4.27e-05,"subfield":{"id":"https://openalex.org/subfields/2207","display_name":"Control and Systems Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"x_concepts":[{"id":"121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","score":0.9096102714538574},{"id":"171146098","wikidata":"https://www.wikidata.org/wiki/Q124192","display_name":"Automotive engineering","score":0.743416428565979},{"id":"127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","score":0.5971999764442444},{"id":"41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","score":0.5324576497077942},{"id":"163258240","wikidata":"https://www.wikidata.org/wiki/Q25342","display_name":"Power (physics)","score":0.5002200603485107}],"counts_by_year":[{"year":2013,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2017,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2019,"works_count":3,"oa_works_count":3,"cited_by_count":3},{"year":2020,"works_count":16,"oa_works_count":14,"cited_by_count":25},{"year":2021,"works_count":12,"oa_works_count":8,"cited_by_count":37},{"year":2022,"works_count":4,"oa_works_count":4,"cited_by_count":16},{"year":2023,"works_count":2,"oa_works_count":2,"cited_by_count":35},{"year":2024,"works_count":4,"oa_works_count":3,"cited_by_count":37},{"year":2025,"works_count":3,"oa_works_count":3,"cited_by_count":28},{"year":2026,"works_count":6,"oa_works_count":6,"cited_by_count":28}],"display_name_alternatives":["R Siregar","Rolan Siregar","Siregar, Rolan"],"block_key":"r siregar","works_api_url":"https://api.openalex.org/works?filter=author.id:A5082400723","awards_count":0,"awards_api_url":"https://api.openalex.org/awards?filter=investigators.author.id:A5082400723","updated_date":"2026-11-10T14:30:39","created_date":"2017-03-23T00:00:00"}
