{"id":"https://openalex.org/W2213844264","doi":"https://doi.org/10.1609/icwsm.v9i1.14664","title":"Twitter Geolocation and Regional Classification via Sparse Coding","display_name":"Twitter Geolocation and Regional Classification via Sparse Coding","publication_year":2021,"publication_date":"2021-08-03","ids":{"openalex":"https://openalex.org/W2213844264","doi":"https://doi.org/10.1609/icwsm.v9i1.14664","mag":"2213844264"},"language":"en","primary_location":{"id":"doi:10.1609/icwsm.v9i1.14664","doi":"https://doi.org/10.1609/icwsm.v9i1.14664","is_oa":true,"landing_page_url":"https://doi.org/10.1609/icwsm.v9i1.14664","pdf_url":"https://ojs.aaai.org/index.php/ICWSM/article/download/14664/14513","source":{"id":"https://openalex.org/S4387284482","display_name":"Proceedings of the International AAAI Conference on Web and Social Media","issn_l":"2162-3449","issn":["2162-3449","2334-0770"],"is_oa":true,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","jufo-1"],"host_organization":"https://openalex.org/P4310320058","host_organization_name":"Association for the Advancement of Artificial Intelligence","host_organization_lineage":["https://openalex.org/P4310320058"],"host_organization_lineage_names":["Association for the Advancement of Artificial Intelligence"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the International AAAI Conference on Web and Social Media","raw_type":"journal-article"},"volume":null,"type":"conference-paper","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"diamond","oa_url":"https://ojs.aaai.org/index.php/ICWSM/article/download/14664/14513","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5029707299","display_name":"Miriam Cha","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I136199984","display_name":"Harvard University","ror":"https://ror.org/03vek6s52","country_code":"US","type":"education","lineage":["https://openalex.org/I136199984"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Miriam Cha","raw_affiliation_strings":["Harvard University"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Harvard University","institution_ids":["https://openalex.org/I136199984"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5012323997","display_name":"Youngjune Gwon","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I136199984","display_name":"Harvard University","ror":"https://ror.org/03vek6s52","country_code":"US","type":"education","lineage":["https://openalex.org/I136199984"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Youngjune Gwon","raw_affiliation_strings":["Harvard University"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Harvard University","institution_ids":["https://openalex.org/I136199984"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5066867900","display_name":"H. T. Kung","orcid":"https://orcid.org/0000-0002-3348-3788","observed_orcids":["https://orcid.org/0000-0002-3348-3788"]},"institutions":[{"id":"https://openalex.org/I136199984","display_name":"Harvard University","ror":"https://ror.org/03vek6s52","country_code":"US","type":"education","lineage":["https://openalex.org/I136199984"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"H. Kung","raw_affiliation_strings":["Harvard University"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Harvard University","institution_ids":["https://openalex.org/I136199984"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I136199984"],"apc_list":null,"apc_paid":null,"fwci":2.939,"has_fulltext":true,"cited_by_count":40,"citation_normalized_percentile":{"value":0.90863952,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":88,"max":99},"biblio":{"volume":"9","issue":"1","first_page":"582","last_page":"585"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11980","display_name":"Human Mobility and Location-Based Analysis","score":0.49000000953674316,"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"}},"topics":[{"id":"https://openalex.org/T11980","display_name":"Human Mobility and Location-Based Analysis","score":0.49000000953674316,"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/T12380","display_name":"Authorship Attribution and Profiling","score":0.12060000002384186,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"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/T10028","display_name":"Topic Modeling","score":0.039900001138448715,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/regional-classification","display_name":"regional classification","score":0.972000002861023},{"id":"https://openalex.org/keywords/sparse-coding","display_name":"sparse coding","score":0.996999979019165},{"id":"https://openalex.org/keywords/dictionary-learning","display_name":"dictionary learning","score":0.9990000128746033},{"id":"https://openalex.org/keywords/unsupervised-learning","display_name":"unsupervised learning","score":0.8650000095367432},{"id":"https://openalex.org/keywords/feature-augmentation","display_name":"feature augmentation","score":0.9980000257492065}],"concepts":[{"id":"https://openalex.org/C22041718","wikidata":"https://www.wikidata.org/wiki/Q638949","display_name":"Geolocation","level":2,"score":0.9613301753997803},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7256459593772888},{"id":"https://openalex.org/C179518139","wikidata":"https://www.wikidata.org/wiki/Q5140297","display_name":"Coding (social sciences)","level":2,"score":0.587273120880127},{"id":"https://openalex.org/C148483581","wikidata":"https://www.wikidata.org/wiki/Q446488","display_name":"Feature selection","level":2,"score":0.5835352540016174},{"id":"https://openalex.org/C77637269","wikidata":"https://www.wikidata.org/wiki/Q7002051","display_name":"Neural coding","level":2,"score":0.5512955784797668},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.5332115888595581},{"id":"https://openalex.org/C153180895","wikidata":"https://www.wikidata.org/wiki/Q7148389","display_name":"Pattern recognition (psychology)","level":2,"score":0.5088770389556885},{"id":"https://openalex.org/C187691185","wikidata":"https://www.wikidata.org/wiki/Q2020720","display_name":"Grid","level":2,"score":0.46574294567108154},{"id":"https://openalex.org/C132964779","wikidata":"https://www.wikidata.org/wiki/Q2110223","display_name":"Raw data","level":2,"score":0.46263307332992554},{"id":"https://openalex.org/C2776401178","wikidata":"https://www.wikidata.org/wiki/Q12050496","display_name":"Feature (linguistics)","level":2,"score":0.44539597630500793},{"id":"https://openalex.org/C520049643","wikidata":"https://www.wikidata.org/wiki/Q189760","display_name":"Voting","level":3,"score":0.44443291425704956},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.4073562026023865},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.11673781275749207},{"id":"https://openalex.org/C136764020","wikidata":"https://www.wikidata.org/wiki/Q466","display_name":"World Wide Web","level":1,"score":0.09976059198379517},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.06884044408798218},{"id":"https://openalex.org/C13280743","wikidata":"https://www.wikidata.org/wiki/Q131089","display_name":"Geodesy","level":1,"score":0.0},{"id":"https://openalex.org/C94625758","wikidata":"https://www.wikidata.org/wiki/Q7163","display_name":"Politics","level":2,"score":0.0},{"id":"https://openalex.org/C41895202","wikidata":"https://www.wikidata.org/wiki/Q8162","display_name":"Linguistics","level":1,"score":0.0},{"id":"https://openalex.org/C199539241","wikidata":"https://www.wikidata.org/wiki/Q7748","display_name":"Law","level":1,"score":0.0},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.0},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0},{"id":"https://openalex.org/C17744445","wikidata":"https://www.wikidata.org/wiki/Q36442","display_name":"Political science","level":0,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1609/icwsm.v9i1.14664","doi":"https://doi.org/10.1609/icwsm.v9i1.14664","is_oa":true,"landing_page_url":"https://doi.org/10.1609/icwsm.v9i1.14664","pdf_url":"https://ojs.aaai.org/index.php/ICWSM/article/download/14664/14513","source":{"id":"https://openalex.org/S4387284482","display_name":"Proceedings of the International AAAI Conference on Web and Social Media","issn_l":"2162-3449","issn":["2162-3449","2334-0770"],"is_oa":true,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","jufo-1"],"host_organization":"https://openalex.org/P4310320058","host_organization_name":"Association for the Advancement of Artificial Intelligence","host_organization_lineage":["https://openalex.org/P4310320058"],"host_organization_lineage_names":["Association for the Advancement of Artificial Intelligence"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the International AAAI Conference on Web and Social Media","raw_type":"journal-article"},{"id":"pmh:oai:ojs.aaai.org:article/14664","doi":null,"is_oa":true,"landing_page_url":"https://ojs.aaai.org/index.php/ICWSM/article/view/14664","pdf_url":"https://ojs.aaai.org/index.php/ICWSM/article/view/14664","source":{"id":"https://openalex.org/S4306400155","display_name":"AAAI Publications (The Association for the Advancement of Artificial Intelligence (AAAI))","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I2801652627","host_organization_name":"Association for the Advancement of Artificial Intelligence","host_organization_lineage":["https://openalex.org/I2801652627"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Proceedings of the International AAAI Conference on Web and Social Media; Vol. 9 No. 1 (2015): Ninth International AAAI Conference on Web and Social Media","raw_type":"info:eu-repo/semantics/article"}],"best_oa_location":{"id":"doi:10.1609/icwsm.v9i1.14664","doi":"https://doi.org/10.1609/icwsm.v9i1.14664","is_oa":true,"landing_page_url":"https://doi.org/10.1609/icwsm.v9i1.14664","pdf_url":"https://ojs.aaai.org/index.php/ICWSM/article/download/14664/14513","source":{"id":"https://openalex.org/S4387284482","display_name":"Proceedings of the International AAAI Conference on Web and Social Media","issn_l":"2162-3449","issn":["2162-3449","2334-0770"],"is_oa":true,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","jufo-1"],"host_organization":"https://openalex.org/P4310320058","host_organization_name":"Association for the Advancement of Artificial Intelligence","host_organization_lineage":["https://openalex.org/P4310320058"],"host_organization_lineage_names":["Association for the Advancement of Artificial Intelligence"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the International AAAI Conference on Web and Social Media","raw_type":"journal-article"},"sustainable_development_goals":[],"study_designs":[],"awards":[{"id":"https://openalex.org/G8817723181","display_name":"Graduate Research Fellowship Program (GRFP)","funder_award_id":"1144152","funder_id":"https://openalex.org/F4320306076","funder_display_name":"National Science Foundation"}],"funders":[{"id":"https://openalex.org/F4320306076","display_name":"National Science Foundation","ror":"https://ror.org/021nxhr62"},{"id":"https://openalex.org/F4320307102","display_name":"Intel Corporation","ror":"https://ror.org/01ek73717"}],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2213844264.pdf","grobid_xml":"https://content.openalex.org/works/W2213844264.grobid-xml"},"referenced_works_count":13,"referenced_works":["https://openalex.org/W1664061557","https://openalex.org/W2078204800","https://openalex.org/W2105464873","https://openalex.org/W2119862467","https://openalex.org/W2127271355","https://openalex.org/W2135046866","https://openalex.org/W2137435333","https://openalex.org/W2142889507","https://openalex.org/W2149510050","https://openalex.org/W2160547390","https://openalex.org/W2165442870","https://openalex.org/W2947000318","https://openalex.org/W6646990050"],"related_works":["https://openalex.org/W7100882626","https://openalex.org/W2793842163","https://openalex.org/W2908841270","https://openalex.org/W2758905590","https://openalex.org/W2782201748","https://openalex.org/W2964347896","https://openalex.org/W2142191319","https://openalex.org/W2112594516","https://openalex.org/W2660829396","https://openalex.org/W2766869372"],"abstract_inverted_index":{"We":[0],"present":[1],"a":[2,32],"data-driven":[3],"approach":[4],"for":[5],"Twitter":[6],"geolocation":[7,60],"and":[8,18,28,43,46,54,62],"regional":[9],"classification.":[10],"Our":[11],"method":[12,23],"is":[13],"based":[14],"on":[15,70],"sparse":[16],"coding":[17],"dictionary":[19],"learning,":[20],"an":[21],"unsupervised":[22],"popular":[24],"in":[25],"computer":[26],"vision":[27],"pattern":[29],"recognition.":[30],"Through":[31],"series":[33],"of":[34],"optimization":[35],"steps":[36],"that":[37],"integrate":[38],"information":[39],"from":[40,66],"both":[41],"feature":[42,52],"raw":[44],"spaces,":[45],"enhancements":[47],"such":[48],"as":[49],"PCA":[50],"whitening,":[51],"augmentation,":[53],"voting-based":[55],"grid":[56],"selection,":[57],"we":[58],"lower":[59],"errors":[61],"improve":[63],"classification":[64],"accuracy":[65],"previously":[67],"known":[68],"results":[69],"the":[71],"GEOTEXT":[72],"dataset.":[73]},"counts_by_year":[{"year":2026,"cited_by_count":2},{"year":2025,"cited_by_count":2},{"year":2023,"cited_by_count":1},{"year":2022,"cited_by_count":2},{"year":2021,"cited_by_count":2},{"year":2020,"cited_by_count":1},{"year":2019,"cited_by_count":4},{"year":2018,"cited_by_count":10},{"year":2017,"cited_by_count":7},{"year":2016,"cited_by_count":6},{"year":2015,"cited_by_count":3}],"updated_date":"2026-11-03T10:50:19.383937","created_date":"2016-06-24T00:00:00"}
