{"id":"https://openalex.org/W2092693668","doi":"https://doi.org/10.1016/0010-4485(90)90104-k","title":"Determining the orientation of closed planar curves","display_name":"Determining the orientation of closed planar curves","publication_year":1990,"publication_date":"1990-09-01","ids":{"openalex":"https://openalex.org/W2092693668","doi":"https://doi.org/10.1016/0010-4485(90)90104-k","mag":"2092693668"},"language":"en","primary_location":{"id":"doi:10.1016/0010-4485(90)90104-k","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0010-4485(90)90104-k","pdf_url":null,"source":{"id":"https://openalex.org/S4210171473","display_name":"Computer-Aided Design","issn_l":"0010-4485","issn":["0010-4485","1879-2685"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310320990","host_organization_name":"Elsevier BV","host_organization_lineage":["https://openalex.org/P4310320990"],"host_organization_lineage_names":["Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Computer-Aided Design","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5078855205","display_name":"Daniel Filip","orcid":null},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"D.J. Filip","raw_affiliation_strings":["Rasna Corporation, 2590 N. First Street, Suite 200, San Jose, CA 95131, USA"],"affiliations":[{"raw_affiliation_string":"Rasna Corporation, 2590 N. First Street, Suite 200, San Jose, CA 95131, USA","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5078855205"],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.5135,"has_fulltext":false,"cited_by_count":3,"citation_normalized_percentile":{"value":0.68939451,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":"22","issue":"7","first_page":"401","last_page":"406"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11245","display_name":"Advanced Numerical Analysis Techniques","score":0.9998999834060669,"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"}},"topics":[{"id":"https://openalex.org/T11245","display_name":"Advanced Numerical Analysis Techniques","score":0.9998999834060669,"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/T10996","display_name":"Computational Geometry and Mesh Generation","score":0.996399998664856,"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"}},{"id":"https://openalex.org/T10571","display_name":"Robotic Mechanisms and Dynamics","score":0.9921000003814697,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/planar","display_name":"Planar","score":0.8689906597137451},{"id":"https://openalex.org/keywords/orientation","display_name":"Orientation (vector space)","score":0.7841733694076538},{"id":"https://openalex.org/keywords/parametric-statistics","display_name":"Parametric statistics","score":0.6556392312049866},{"id":"https://openalex.org/keywords/geometry","display_name":"Geometry","score":0.5930464267730713},{"id":"https://openalex.org/keywords/differential","display_name":"Differential (mechanical device)","score":0.4815821647644043},{"id":"https://openalex.org/keywords/parametric-equation","display_name":"Parametric equation","score":0.44837814569473267},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.44376519322395325},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.35409295558929443},{"id":"https://openalex.org/keywords/calculus","display_name":"Calculus (dental)","score":0.33004575967788696},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.14127862453460693},{"id":"https://openalex.org/keywords/computer-graphics","display_name":"Computer graphics (images)","score":0.10575735569000244},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.06227445602416992}],"concepts":[{"id":"https://openalex.org/C134786449","wikidata":"https://www.wikidata.org/wiki/Q3391255","display_name":"Planar","level":2,"score":0.8689906597137451},{"id":"https://openalex.org/C16345878","wikidata":"https://www.wikidata.org/wiki/Q107472979","display_name":"Orientation (vector space)","level":2,"score":0.7841733694076538},{"id":"https://openalex.org/C117251300","wikidata":"https://www.wikidata.org/wiki/Q1849855","display_name":"Parametric statistics","level":2,"score":0.6556392312049866},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.5930464267730713},{"id":"https://openalex.org/C93226319","wikidata":"https://www.wikidata.org/wiki/Q193137","display_name":"Differential (mechanical device)","level":2,"score":0.4815821647644043},{"id":"https://openalex.org/C99636146","wikidata":"https://www.wikidata.org/wiki/Q35889","display_name":"Parametric equation","level":2,"score":0.44837814569473267},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.44376519322395325},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.35409295558929443},{"id":"https://openalex.org/C2777686260","wikidata":"https://www.wikidata.org/wiki/Q144037","display_name":"Calculus (dental)","level":2,"score":0.33004575967788696},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.14127862453460693},{"id":"https://openalex.org/C121684516","wikidata":"https://www.wikidata.org/wiki/Q7600677","display_name":"Computer graphics (images)","level":1,"score":0.10575735569000244},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.06227445602416992},{"id":"https://openalex.org/C97355855","wikidata":"https://www.wikidata.org/wiki/Q11473","display_name":"Thermodynamics","level":1,"score":0.0},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.0},{"id":"https://openalex.org/C199343813","wikidata":"https://www.wikidata.org/wiki/Q12128","display_name":"Dentistry","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1016/0010-4485(90)90104-k","is_oa":false,"landing_page_url":"https://doi.org/10.1016/0010-4485(90)90104-k","pdf_url":null,"source":{"id":"https://openalex.org/S4210171473","display_name":"Computer-Aided Design","issn_l":"0010-4485","issn":["0010-4485","1879-2685"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310320990","host_organization_name":"Elsevier BV","host_organization_lineage":["https://openalex.org/P4310320990"],"host_organization_lineage_names":["Elsevier BV"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Computer-Aided Design","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":14,"referenced_works":["https://openalex.org/W1565212980","https://openalex.org/W1587467920","https://openalex.org/W1835627343","https://openalex.org/W1975470983","https://openalex.org/W2033647758","https://openalex.org/W2054349093","https://openalex.org/W2064044318","https://openalex.org/W2090344516","https://openalex.org/W2119663672","https://openalex.org/W2574741566","https://openalex.org/W2949146770","https://openalex.org/W4247266993","https://openalex.org/W4292910193","https://openalex.org/W6666263525"],"related_works":["https://openalex.org/W4206327962","https://openalex.org/W2010009304","https://openalex.org/W1996851061","https://openalex.org/W3021694725","https://openalex.org/W2022959950","https://openalex.org/W2071113133","https://openalex.org/W3151072301","https://openalex.org/W2356272394","https://openalex.org/W214846656","https://openalex.org/W2168727758"],"abstract_inverted_index":null,"counts_by_year":[],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}