{"id":"https://openalex.org/A5006847269","orcid":"https://orcid.org/0000-0002-7571-7984","observed_orcids":["https://orcid.org/0000-0002-7571-7984"],"display_name":"Heike Martensen","raw_author_names":["H Martensen","HEIKE MARTENSEN","Heike Martensen","Martensen, H","Martensen, Heike"],"full_name":"Heike Martensen (7149566)","works_count":64,"cited_by_count":919,"summary_stats":{"2yr_mean_citedness":1.6666666666666667,"h_index":17,"i10_index":22},"ids":{"openalex":"https://openalex.org/A5006847269","orcid":"https://orcid.org/0000-0002-7571-7984","observed_orcids":["https://orcid.org/0000-0002-7571-7984"]},"affiliations":[{"institution":{"id":"https://openalex.org/I145872427","ror":"https://ror.org/016xsfp80","display_name":"Radboud University Nijmegen","country_code":"NL","type":"education","lineage":["https://openalex.org/I145872427"]},"years":[2000,1997]},{"institution":{"id":"https://openalex.org/I149213910","ror":"https://ror.org/008x57b05","display_name":"University of Antwerp","country_code":"BE","type":"education","lineage":["https://openalex.org/I149213910"]},"years":[2008,2006,2005,2004,2003]},{"institution":{"id":"https://openalex.org/I4210117207","ror":"https://ror.org/02efwpm71","display_name":"Institut Belge pour la S\u00e9curit\u00e9 Routi\u00e8re","country_code":"BE","type":"nonprofit","lineage":["https://openalex.org/I4210117207"]},"years":[2017,2016,2015,2014,2013,2012,2011,2010,2009]},{"institution":{"id":"https://openalex.org/I4405255649","ror":"https://ror.org/038fyf011","display_name":"Kennisinstituut voor Mobiliteitsbeleid","country_code":"NL","type":"government","lineage":["https://openalex.org/I331567899","https://openalex.org/I4210140876","https://openalex.org/I4405255649"]},"years":[2025,2024]}],"last_known_institutions":[{"id":"https://openalex.org/I4405255649","ror":"https://ror.org/038fyf011","display_name":"Kennisinstituut voor Mobiliteitsbeleid","country_code":"NL","type":"government","lineage":["https://openalex.org/I331567899","https://openalex.org/I4210140876","https://openalex.org/I4405255649"]}],"topics":[{"id":"https://openalex.org/T10370","display_name":"Traffic and Road Safety","count":41,"subfield":{"id":"https://openalex.org/subfields/2213","display_name":"Safety, Risk, Reliability and Quality"},"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/T13527","display_name":"Road Transport and Highway Systems","count":30,"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/T12725","display_name":"Railways and European Transport Policy","count":15,"subfield":{"id":"https://openalex.org/subfields/3313","display_name":"Transportation"},"field":{"id":"https://openalex.org/fields/33","display_name":"Social Sciences"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},{"id":"https://openalex.org/T10103","display_name":"Reading and Literacy Development","count":13,"subfield":{"id":"https://openalex.org/subfields/3204","display_name":"Developmental and Educational Psychology"},"field":{"id":"https://openalex.org/fields/32","display_name":"Psychology"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},{"id":"https://openalex.org/T10465","display_name":"Neurobiology of Language and Bilingualism","count":11,"subfield":{"id":"https://openalex.org/subfields/2805","display_name":"Cognitive Neuroscience"},"field":{"id":"https://openalex.org/fields/28","display_name":"Neuroscience"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}}],"topic_share":[{"id":"https://openalex.org/T10370","display_name":"Traffic and Road Safety","value":8.97e-05,"subfield":{"id":"https://openalex.org/subfields/2213","display_name":"Safety, Risk, Reliability and Quality"},"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/T13527","display_name":"Road Transport and Highway Systems","value":6.97e-05,"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/T12644","display_name":"Wildlife-Road Interactions and Conservation","value":5.87e-05,"subfield":{"id":"https://openalex.org/subfields/2303","display_name":"Ecology"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12315","display_name":"Older Adults Driving Studies","value":5.79e-05,"subfield":{"id":"https://openalex.org/subfields/2717","display_name":"Geriatrics and Gerontology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T14445","display_name":"Transportation Safety and Impact Analysis","value":4.19e-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"}}],"x_concepts":[{"id":"71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","score":0.7253504395484924},{"id":"22212356","wikidata":"https://www.wikidata.org/wiki/Q775325","display_name":"Transport engineering","score":0.6523371934890747},{"id":"41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","score":0.5788087844848633},{"id":"127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","score":0.5130740404129028},{"id":"144133560","wikidata":"https://www.wikidata.org/wiki/Q4830453","display_name":"Business","score":0.506513237953186}],"counts_by_year":[{"year":1997,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2000,"works_count":2,"oa_works_count":2,"cited_by_count":0},{"year":2001,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2003,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2004,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2005,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2006,"works_count":3,"oa_works_count":1,"cited_by_count":0},{"year":2008,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":2009,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2010,"works_count":3,"oa_works_count":3,"cited_by_count":0},{"year":2011,"works_count":4,"oa_works_count":2,"cited_by_count":0},{"year":2012,"works_count":4,"oa_works_count":2,"cited_by_count":27},{"year":2013,"works_count":4,"oa_works_count":0,"cited_by_count":12},{"year":2014,"works_count":2,"oa_works_count":1,"cited_by_count":24},{"year":2015,"works_count":2,"oa_works_count":1,"cited_by_count":30},{"year":2016,"works_count":8,"oa_works_count":6,"cited_by_count":59},{"year":2017,"works_count":7,"oa_works_count":6,"cited_by_count":31},{"year":2018,"works_count":4,"oa_works_count":4,"cited_by_count":24},{"year":2019,"works_count":1,"oa_works_count":1,"cited_by_count":74},{"year":2020,"works_count":0,"oa_works_count":0,"cited_by_count":63},{"year":2021,"works_count":1,"oa_works_count":0,"cited_by_count":78},{"year":2022,"works_count":2,"oa_works_count":2,"cited_by_count":48},{"year":2023,"works_count":2,"oa_works_count":1,"cited_by_count":70},{"year":2024,"works_count":2,"oa_works_count":1,"cited_by_count":74},{"year":2025,"works_count":1,"oa_works_count":1,"cited_by_count":71},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":42}],"display_name_alternatives":["H Martensen","HEIKE MARTENSEN","Heike Martensen","Martensen, H","Martensen, Heike"],"block_key":"h martensen","works_api_url":"https://api.openalex.org/works?filter=author.id:A5006847269","awards_count":0,"awards_api_url":"https://api.openalex.org/awards?filter=investigators.author.id:A5006847269","updated_date":"2026-11-12T13:17:38","created_date":"2016-06-24T00:00:00"}
