{"id":"https://openalex.org/A5036054558","orcid":"https://orcid.org/0000-0003-0230-7180","observed_orcids":["https://orcid.org/0000-0003-0230-7180"],"display_name":"Rafeq A. Khalefa","raw_author_names":["Rafeq A. Khalefa","Rafeq Ahmad Khalefa","Rafeq Khalefa"],"full_name":"Rafeq A. Khalefa","works_count":11,"cited_by_count":114,"summary_stats":{"2yr_mean_citedness":2.0,"h_index":4,"i10_index":3},"ids":{"openalex":"https://openalex.org/A5036054558","orcid":"https://orcid.org/0000-0003-0230-7180","observed_orcids":["https://orcid.org/0000-0003-0230-7180"]},"affiliations":[{"institution":{"id":"https://openalex.org/I102254642","ror":"https://ror.org/01pk8rb11","display_name":"University of Kirkuk","country_code":"IQ","type":"education","lineage":["https://openalex.org/I102254642"]},"years":[2017,2011]},{"institution":{"id":"https://openalex.org/I4210143651","ror":"https://ror.org/03ytenv10","display_name":"Northern Technical University","country_code":"IQ","type":"education","lineage":["https://openalex.org/I4210143651"]},"years":[2024,2023,2022,2021,2019,2018]}],"last_known_institutions":[{"id":"https://openalex.org/I4210143651","ror":"https://ror.org/03ytenv10","display_name":"Northern Technical University","country_code":"IQ","type":"education","lineage":["https://openalex.org/I4210143651"]}],"topics":[{"id":"https://openalex.org/T10117","display_name":"Advanced Combustion Engine Technologies","count":6,"subfield":{"id":"https://openalex.org/subfields/1507","display_name":"Fluid Flow and Transfer Processes"},"field":{"id":"https://openalex.org/fields/15","display_name":"Chemical Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13990","display_name":"Engine and Fuel Emissions","count":5,"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/T10998","display_name":"Heat Transfer and Optimization","count":4,"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/T11945","display_name":"Heat Transfer Mechanisms","count":4,"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/T10507","display_name":"Biodiesel Production and Applications","count":3,"subfield":{"id":"https://openalex.org/subfields/2103","display_name":"Fuel Technology"},"field":{"id":"https://openalex.org/fields/21","display_name":"Energy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"topic_share":[{"id":"https://openalex.org/T11945","display_name":"Heat Transfer Mechanisms","value":2.99e-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/T13990","display_name":"Engine and Fuel Emissions","value":2.17e-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/T10507","display_name":"Biodiesel Production and Applications","value":2e-05,"subfield":{"id":"https://openalex.org/subfields/2103","display_name":"Fuel Technology"},"field":{"id":"https://openalex.org/fields/21","display_name":"Energy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13858","display_name":"Technical Engine Diagnostics and Monitoring","value":1.96e-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/T10850","display_name":"Heat Transfer and Boiling Studies","value":1.74e-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"}}],"x_concepts":[{"id":"192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","score":0.7495980858802795},{"id":"171146098","wikidata":"https://www.wikidata.org/wiki/Q124192","display_name":"Automotive engineering","score":0.7210524082183838},{"id":"127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","score":0.4926312565803528},{"id":"78519656","wikidata":"https://www.wikidata.org/wiki/Q101333","display_name":"Mechanical engineering","score":0.34961622953414917},{"id":"121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","score":0.2904660701751709}],"counts_by_year":[{"year":2011,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2013,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2017,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2018,"works_count":2,"oa_works_count":2,"cited_by_count":0},{"year":2019,"works_count":1,"oa_works_count":1,"cited_by_count":6},{"year":2020,"works_count":0,"oa_works_count":0,"cited_by_count":10},{"year":2021,"works_count":2,"oa_works_count":2,"cited_by_count":16},{"year":2022,"works_count":1,"oa_works_count":1,"cited_by_count":13},{"year":2023,"works_count":1,"oa_works_count":1,"cited_by_count":16},{"year":2024,"works_count":1,"oa_works_count":0,"cited_by_count":20},{"year":2025,"works_count":0,"oa_works_count":0,"cited_by_count":26},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":7}],"display_name_alternatives":["Rafeq A. Khalefa","Rafeq Ahmad Khalefa","Rafeq Khalefa"],"block_key":"r khalefa","works_api_url":"https://api.openalex.org/works?filter=author.id:A5036054558","awards_count":0,"awards_api_url":"https://api.openalex.org/awards?filter=investigators.author.id:A5036054558","updated_date":"2026-11-10T14:30:39","created_date":"2016-06-24T00:00:00"}