{"id":"https://openalex.org/W4297883132","doi":"https://doi.org/10.1145/3492866.3557736","title":"MOCHA","display_name":"MOCHA","publication_year":2022,"publication_date":"2022-09-21","ids":{"openalex":"https://openalex.org/W4297883132","doi":"https://doi.org/10.1145/3492866.3557736"},"language":"en","primary_location":{"id":"doi:10.1145/3492866.3557736","is_oa":true,"landing_page_url":"https://doi.org/10.1145/3492866.3557736","pdf_url":"https://dl.acm.org/doi/pdf/10.1145/3492866.3557736","source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the Twenty-Third International Symposium on Theory, Algorithmic Foundations, and Protocol Design for Mobile Networks and Mobile Computing","raw_type":"proceedings-article"},"type":"conference-paper","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://dl.acm.org/doi/pdf/10.1145/3492866.3557736","any_repository_has_fulltext":null},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5046878953","display_name":"Yuuki Nishiyama","orcid":"https://orcid.org/0000-0002-5549-5595"},"institutions":[{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Yuuki Nishiyama","raw_affiliation_strings":["The University of Tokyo, Tokyo, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"The University of Tokyo, Tokyo, Japan","institution_ids":["https://openalex.org/I74801974"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5102737863","display_name":"Hiroaki Murakami","orcid":"https://orcid.org/0000-0002-4691-7696"},"institutions":[{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Hiroaki Murakami","raw_affiliation_strings":["The University of Tokyo, Tokyo, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"The University of Tokyo, Tokyo, Japan","institution_ids":["https://openalex.org/I74801974"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5086420781","display_name":"Ryoto Suzuki","orcid":null},"institutions":[{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Ryoto Suzuki","raw_affiliation_strings":["The University of Tokyo, Tokyo, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"The University of Tokyo, Tokyo, Japan","institution_ids":["https://openalex.org/I74801974"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5000007788","display_name":"Kazusato Oko","orcid":null},"institutions":[{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Kazusato Oko","raw_affiliation_strings":["The University of Tokyo, Tokyo, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"The University of Tokyo, Tokyo, Japan","institution_ids":["https://openalex.org/I74801974"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5012678349","display_name":"Issey Sukeda","orcid":null},"institutions":[{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Issey Sukeda","raw_affiliation_strings":["The University of Tokyo, Tokyo, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"The University of Tokyo, Tokyo, Japan","institution_ids":["https://openalex.org/I74801974"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5050720322","display_name":"Kaoru Sezaki","orcid":"https://orcid.org/0000-0003-1194-4632"},"institutions":[{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Kaoru Sezaki","raw_affiliation_strings":["The University of Tokyo, Tokyo, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"The University of Tokyo, Tokyo, Japan","institution_ids":["https://openalex.org/I74801974"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5069381472","display_name":"Yoshihiro Kawahara","orcid":"https://orcid.org/0000-0002-0310-2577"},"institutions":[{"id":"https://openalex.org/I74801974","display_name":"The University of Tokyo","ror":"https://ror.org/057zh3y96","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Yoshihiro Kawahara","raw_affiliation_strings":["The University of Tokyo, Tokyo, Japan"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"The University of Tokyo, Tokyo, Japan","institution_ids":["https://openalex.org/I74801974"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I74801974"],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":true,"cited_by_count":4,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"253","last_page":"258"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12943","display_name":"COVID-19 Digital Contact Tracing","score":0.9991000294685364,"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"}},"topics":[{"id":"https://openalex.org/T12943","display_name":"COVID-19 Digital Contact Tracing","score":0.9991000294685364,"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/T11980","display_name":"Human Mobility and Location-Based Analysis","score":0.9905999898910522,"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/T11045","display_name":"Privacy, Security, and Data Protection","score":0.9829999804496765,"subfield":{"id":"https://openalex.org/subfields/3312","display_name":"Sociology and Political Science"},"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/permission","display_name":"Permission","score":0.7974789142608643},{"id":"https://openalex.org/keywords/beacon","display_name":"Beacon","score":0.7228062152862549},{"id":"https://openalex.org/keywords/reservation","display_name":"Reservation","score":0.6647028923034668},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6448296904563904},{"id":"https://openalex.org/keywords/bluetooth","display_name":"Bluetooth","score":0.6082923412322998},{"id":"https://openalex.org/keywords/computer-security","display_name":"Computer security","score":0.5504681468009949},{"id":"https://openalex.org/keywords/tracing","display_name":"Tracing","score":0.49118897318840027},{"id":"https://openalex.org/keywords/global-positioning-system","display_name":"Global Positioning System","score":0.4114590883255005},{"id":"https://openalex.org/keywords/world-wide-web","display_name":"World Wide Web","score":0.3340187668800354},{"id":"https://openalex.org/keywords/computer-network","display_name":"Computer network","score":0.3113603889942169},{"id":"https://openalex.org/keywords/telecommunications","display_name":"Telecommunications","score":0.2816488444805145},{"id":"https://openalex.org/keywords/wireless","display_name":"Wireless","score":0.16414690017700195},{"id":"https://openalex.org/keywords/operating-system","display_name":"Operating system","score":0.16354498267173767}],"concepts":[{"id":"https://openalex.org/C2779089604","wikidata":"https://www.wikidata.org/wiki/Q7169333","display_name":"Permission","level":2,"score":0.7974789142608643},{"id":"https://openalex.org/C102168758","wikidata":"https://www.wikidata.org/wiki/Q7321258","display_name":"Beacon","level":2,"score":0.7228062152862549},{"id":"https://openalex.org/C2777632111","wikidata":"https://www.wikidata.org/wiki/Q1937518","display_name":"Reservation","level":2,"score":0.6647028923034668},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6448296904563904},{"id":"https://openalex.org/C546215728","wikidata":"https://www.wikidata.org/wiki/Q39531","display_name":"Bluetooth","level":3,"score":0.6082923412322998},{"id":"https://openalex.org/C38652104","wikidata":"https://www.wikidata.org/wiki/Q3510521","display_name":"Computer security","level":1,"score":0.5504681468009949},{"id":"https://openalex.org/C138673069","wikidata":"https://www.wikidata.org/wiki/Q322229","display_name":"Tracing","level":2,"score":0.49118897318840027},{"id":"https://openalex.org/C60229501","wikidata":"https://www.wikidata.org/wiki/Q18822","display_name":"Global Positioning System","level":2,"score":0.4114590883255005},{"id":"https://openalex.org/C136764020","wikidata":"https://www.wikidata.org/wiki/Q466","display_name":"World Wide Web","level":1,"score":0.3340187668800354},{"id":"https://openalex.org/C31258907","wikidata":"https://www.wikidata.org/wiki/Q1301371","display_name":"Computer network","level":1,"score":0.3113603889942169},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.2816488444805145},{"id":"https://openalex.org/C555944384","wikidata":"https://www.wikidata.org/wiki/Q249","display_name":"Wireless","level":2,"score":0.16414690017700195},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.16354498267173767},{"id":"https://openalex.org/C17744445","wikidata":"https://www.wikidata.org/wiki/Q36442","display_name":"Political science","level":0,"score":0.0},{"id":"https://openalex.org/C199539241","wikidata":"https://www.wikidata.org/wiki/Q7748","display_name":"Law","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1145/3492866.3557736","is_oa":true,"landing_page_url":"https://doi.org/10.1145/3492866.3557736","pdf_url":"https://dl.acm.org/doi/pdf/10.1145/3492866.3557736","source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the Twenty-Third International Symposium on Theory, Algorithmic Foundations, and Protocol Design for Mobile Networks and Mobile Computing","raw_type":"proceedings-article"}],"best_oa_location":{"id":"doi:10.1145/3492866.3557736","is_oa":true,"landing_page_url":"https://doi.org/10.1145/3492866.3557736","pdf_url":"https://dl.acm.org/doi/pdf/10.1145/3492866.3557736","source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the Twenty-Third International Symposium on Theory, Algorithmic Foundations, and Protocol Design for Mobile Networks and Mobile Computing","raw_type":"proceedings-article"},"sustainable_development_goals":[{"score":0.46000000834465027,"id":"https://metadata.un.org/sdg/16","display_name":"Peace, Justice and strong institutions"}],"awards":[],"funders":[],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W4297883132.pdf","grobid_xml":"https://content.openalex.org/works/W4297883132.grobid-xml"},"referenced_works_count":11,"referenced_works":["https://openalex.org/W2081525165","https://openalex.org/W2086663066","https://openalex.org/W2467547022","https://openalex.org/W3013215798","https://openalex.org/W3019051739","https://openalex.org/W3036422000","https://openalex.org/W3156424762","https://openalex.org/W3174126115","https://openalex.org/W3186300414","https://openalex.org/W3201856125","https://openalex.org/W3205474356"],"related_works":["https://openalex.org/W3176279093","https://openalex.org/W2374086689","https://openalex.org/W2567632598","https://openalex.org/W2373945265","https://openalex.org/W2370203001","https://openalex.org/W1912565424","https://openalex.org/W4313213593","https://openalex.org/W2518860590","https://openalex.org/W3136975152","https://openalex.org/W4386584931"],"abstract_inverted_index":{"Users":[0],"and":[1,33,47,67,86,106,134],"operators":[2],"of":[3,16,25,54,124],"shared":[4],"spaces":[5],"must":[6],"ensure":[7],"safety":[8],"in":[9,81,118,137],"such":[10,41],"areas":[11],"to":[12,91,110,130,143],"prevent":[13],"the":[14,52,122,126,132,145],"spread":[15],"COVID-19.":[17],"Although":[18],"each":[19,82],"organization":[20],"has":[21],"operated":[22],"a":[23,63,116,119],"variety":[24],"safety-related":[26],"systems,":[27],"including":[28],"contact":[29,102],"tracing,":[30,103],"congestion":[31,104],"monitoring,":[32,105],"check-in":[34],"services,":[35],"it":[36],"is":[37,98],"unclear":[38],"what":[39],"elements,":[40],"as":[42],"privacy":[43],"protection":[44],"level,":[45],"benefits,":[46],"permission":[48],"procedures,":[49],"have":[50],"promoted":[51],"usage":[53,113],"these":[55],"systems.":[56],"In":[57],"this":[58],"study,":[59],"we":[60],"created":[61],"MOCHA,":[62],"platform":[64,72],"for":[65,100,115],"sharing":[66],"tracking":[68],"room-level":[69,101],"locations.":[70],"This":[71],"automatically":[73],"detects":[74],"visited":[75],"places":[76],"by":[77],"scanning":[78],"Bluetooth":[79],"beacons":[80],"room":[83],"using":[84],"smartphones":[85],"shares":[87],"location":[88],"data":[89,97,114],"according":[90],"predefined":[92],"user":[93],"settings.":[94],"The":[95],"collected":[96],"used":[99],"reservation":[107],"services.":[108],"According":[109],">6,500":[111],"users'":[112],"year":[117],"university,":[120],"outlining":[121],"advantages":[123],"utilizing":[125],"app":[127,146],"encouraged":[128,142],"people":[129],"install":[131],"app,":[133],"reinforced":[135],"connections":[136],"small":[138],"private":[139],"groups":[140],"are":[141],"use":[144],"continuously.":[147]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":2},{"year":2023,"cited_by_count":1}],"updated_date":"2026-07-14T23:27:15.235271","created_date":"2022-10-01T00:00:00"}