{"id":"https://openalex.org/W2170136948","doi":"https://doi.org/10.1145/1459359.1459503","title":"What did you do today?","display_name":"What did you do today?","publication_year":2008,"publication_date":"2008-10-26","ids":{"openalex":"https://openalex.org/W2170136948","doi":"https://doi.org/10.1145/1459359.1459503","mag":"2170136948"},"language":"en","primary_location":{"id":"doi:10.1145/1459359.1459503","is_oa":false,"landing_page_url":"https://doi.org/10.1145/1459359.1459503","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 16th ACM international conference on Multimedia","raw_type":"proceedings-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"http://publications.idiap.ch/downloads/papers/2008/farrahi-acmmm-2008.pdf","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5077531047","display_name":"Katayoun Farrahi","orcid":"https://orcid.org/0000-0001-6775-127X"},"institutions":[{"id":"https://openalex.org/I5124864","display_name":"\u00c9cole Polytechnique F\u00e9d\u00e9rale de Lausanne","ror":"https://ror.org/02s376052","country_code":"CH","type":"education","lineage":["https://openalex.org/I2799323385","https://openalex.org/I5124864"]}],"countries":["CH"],"is_corresponding":false,"raw_author_name":"Katayoun Farrahi","raw_affiliation_strings":["\u00c9cole polytechnique f\u00e9d\u00e9rale de Lausanne (EPFL), Martigny/Lausanne, Switzerland"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"\u00c9cole polytechnique f\u00e9d\u00e9rale de Lausanne (EPFL), Martigny/Lausanne, Switzerland","institution_ids":["https://openalex.org/I5124864"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5012965551","display_name":"Daniel G\u00e1tica-P\u00e9rez","orcid":"https://orcid.org/0000-0001-5488-2182"},"institutions":[{"id":"https://openalex.org/I5124864","display_name":"\u00c9cole Polytechnique F\u00e9d\u00e9rale de Lausanne","ror":"https://ror.org/02s376052","country_code":"CH","type":"education","lineage":["https://openalex.org/I2799323385","https://openalex.org/I5124864"]}],"countries":["CH"],"is_corresponding":false,"raw_author_name":"Daniel Gatica-Perez","raw_affiliation_strings":["Ecole polytechnique f\u00e9d\u00e9rale de Lausanne (EPFL), Martigny/Lausanne, Switzerland"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Ecole polytechnique f\u00e9d\u00e9rale de Lausanne (EPFL), Martigny/Lausanne, Switzerland","institution_ids":["https://openalex.org/I5124864"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":24.4091,"has_fulltext":true,"cited_by_count":121,"citation_normalized_percentile":{"value":0.99402692,"is_in_top_1_percent":true,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":91,"max":100},"biblio":{"volume":null,"issue":null,"first_page":"849","last_page":"852"},"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":0.9995999932289124,"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":0.9995999932289124,"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/T10203","display_name":"Recommender Systems and Techniques","score":0.9807999730110168,"subfield":{"id":"https://openalex.org/subfields/1710","display_name":"Information Systems"},"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/T10757","display_name":"Geographic Information Systems Studies","score":0.9725000262260437,"subfield":{"id":"https://openalex.org/subfields/3305","display_name":"Geography, Planning and Development"},"field":{"id":"https://openalex.org/fields/33","display_name":"Social Sciences"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5381397604942322}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5381397604942322}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.1145/1459359.1459503","is_oa":false,"landing_page_url":"https://doi.org/10.1145/1459359.1459503","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 16th ACM international conference on Multimedia","raw_type":"proceedings-article"},{"id":"pmh:oai:infoscience.tind.io:145976","is_oa":true,"landing_page_url":"http://publications.idiap.ch/index.php/publications/showcite/farrahi:rr08-49","pdf_url":"http://publications.idiap.ch/downloads/papers/2008/farrahi-acmmm-2008.pdf","source":{"id":"https://openalex.org/S4306400487","display_name":"Infoscience (Ecole Polytechnique F\u00e9d\u00e9rale de Lausanne)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"conference proceedings"},{"id":"pmh:oai:eprints.soton.ac.uk:430374","is_oa":false,"landing_page_url":"https://eprints.soton.ac.uk/430374/","pdf_url":null,"source":{"id":"https://openalex.org/S4306401019","display_name":"ePrints Soton (University of Southampton)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I43439940","host_organization_name":"University of Southampton","host_organization_lineage":["https://openalex.org/I43439940"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Conference or Workshop Item"}],"best_oa_location":{"id":"pmh:oai:infoscience.tind.io:145976","is_oa":true,"landing_page_url":"http://publications.idiap.ch/index.php/publications/showcite/farrahi:rr08-49","pdf_url":"http://publications.idiap.ch/downloads/papers/2008/farrahi-acmmm-2008.pdf","source":{"id":"https://openalex.org/S4306400487","display_name":"Infoscience (Ecole Polytechnique F\u00e9d\u00e9rale de Lausanne)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"conference proceedings"},"sustainable_development_goals":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320306076","display_name":"National Science Foundation","ror":"https://ror.org/021nxhr62"},{"id":"https://openalex.org/F4320320924","display_name":"Schweizerischer Nationalfonds zur F\u00f6rderung der Wissenschaftlichen Forschung","ror":"https://ror.org/00yjd3n13"}],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2170136948.pdf","grobid_xml":"https://content.openalex.org/works/W2170136948.grobid-xml"},"referenced_works_count":10,"referenced_works":["https://openalex.org/W1565064763","https://openalex.org/W1880262756","https://openalex.org/W2001082470","https://openalex.org/W2109154616","https://openalex.org/W2122695597","https://openalex.org/W2148108980","https://openalex.org/W2171634212","https://openalex.org/W6639619044","https://openalex.org/W6685078230","https://openalex.org/W6729308270"],"related_works":["https://openalex.org/W2899084033","https://openalex.org/W2748952813","https://openalex.org/W2390279801","https://openalex.org/W2358668433","https://openalex.org/W2376932109","https://openalex.org/W2001405890","https://openalex.org/W2382290278","https://openalex.org/W2350741829","https://openalex.org/W2130043461","https://openalex.org/W2530322880"],"abstract_inverted_index":{"&lt;p&gt;We":[0],"present":[1],"a":[2,103],"framework":[3,20],"built":[4],"from":[5,16,30,41],"two":[6],"Hierarchical":[7],"Bayesian":[8],"topic":[9],"models":[10],"to":[11,73,132],"discover":[12,48],"human":[13,39],"location-driven":[14,22],"routines":[15,64,100],"mobile":[17],"phones.":[18],"The":[19,53],"uses":[21],"bag":[23],"representations":[24],"of":[25,37,51,102,106,130],"people's":[26],"daily":[27,134],"activities":[28],"obtained":[29],"celltower":[31],"connections.":[32],"Using":[33],"68":[34],"000+":[35],"hours":[36],"real-life":[38],"data":[40],"the":[42,69,85,90,94,114,122],"Reality":[43],"Mining":[44],"dataset,":[45],"we":[46],"successfully":[47],"various":[49],"types":[50],"routines.":[52],"first":[54],"studied":[55],"model,":[56],"Latent":[57],"Dirichlet":[58],"Allocation":[59],"(LDA),":[60],"automatically":[61],"discovers":[62],"characteristic":[63,101],"for":[65,84],"all":[66],"individuals":[67],"in":[68,113,121],"study,":[70],"including":[71],"\"going":[72],"work":[74,78],"at":[75,79,111],"10am\",":[76],"\"leaving":[77],"night\",":[80],"or":[81],"\"staying":[82],"home":[83,112],"entire":[86],"evening\".":[87],"In":[88],"contrast,":[89],"second":[91],"methodology":[92],"with":[93],"Author":[95],"Topic":[96],"model":[97],"(ATM)":[98],"finds":[99],"selected":[104],"groups":[105],"users,":[107],"such":[108],"as":[109],"\"being":[110],"mornings":[115],"and":[116,124],"evenings":[117],"while":[118],"being":[119],"out":[120],"afternoon\",":[123],"ranks":[125],"users":[126],"by":[127],"their":[128],"probability":[129],"conforming":[131],"certain":[133],"routines.&lt;/p&gt;":[135]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":1},{"year":2022,"cited_by_count":2},{"year":2021,"cited_by_count":5},{"year":2020,"cited_by_count":2},{"year":2019,"cited_by_count":6},{"year":2018,"cited_by_count":6},{"year":2017,"cited_by_count":6},{"year":2016,"cited_by_count":11},{"year":2015,"cited_by_count":8},{"year":2014,"cited_by_count":14},{"year":2013,"cited_by_count":14},{"year":2012,"cited_by_count":18}],"updated_date":"2026-06-11T09:08:48.828518","created_date":"2016-06-24T00:00:00"}
