{"id":"https://openalex.org/W3039866371","doi":"https://doi.org/10.1109/percom45495.2020.9127369","title":"Helena: Real-time Contact-free Monitoring of Sleep Activities and Events around the Bed","display_name":"Helena: Real-time Contact-free Monitoring of Sleep Activities and Events around the Bed","publication_year":2020,"publication_date":"2020-03-01","ids":{"openalex":"https://openalex.org/W3039866371","doi":"https://doi.org/10.1109/percom45495.2020.9127369","mag":"3039866371"},"language":"en","primary_location":{"id":"doi:10.1109/percom45495.2020.9127369","is_oa":false,"landing_page_url":"https://doi.org/10.1109/percom45495.2020.9127369","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2020 IEEE International Conference on Pervasive Computing and Communications (PerCom)","raw_type":"proceedings-article"},"type":"conference-paper","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/A5034909809","display_name":"Jose Clemente","orcid":"https://orcid.org/0000-0003-0070-0800"},"institutions":[{"id":"https://openalex.org/I165733156","display_name":"University of Georgia","ror":"https://ror.org/00te3t702","country_code":"US","type":"education","lineage":["https://openalex.org/I165733156"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Jose Clemente","raw_affiliation_strings":["Center for Cyber-Physical Systems, University of Georgia, Athens, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Center for Cyber-Physical Systems, University of Georgia, Athens, USA","institution_ids":["https://openalex.org/I165733156"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5053766392","display_name":"Maria Valero","orcid":"https://orcid.org/0000-0001-8913-9604"},"institutions":[{"id":"https://openalex.org/I165733156","display_name":"University of Georgia","ror":"https://ror.org/00te3t702","country_code":"US","type":"education","lineage":["https://openalex.org/I165733156"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Maria Valero","raw_affiliation_strings":["Center for Cyber-Physical Systems, University of Georgia, Athens, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Center for Cyber-Physical Systems, University of Georgia, Athens, USA","institution_ids":["https://openalex.org/I165733156"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5024397951","display_name":"Fangyu Li","orcid":"https://orcid.org/0000-0003-2340-3622"},"institutions":[{"id":"https://openalex.org/I165733156","display_name":"University of Georgia","ror":"https://ror.org/00te3t702","country_code":"US","type":"education","lineage":["https://openalex.org/I165733156"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Fangyu Li","raw_affiliation_strings":["Center for Cyber-Physical Systems, University of Georgia, Athens, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Center for Cyber-Physical Systems, University of Georgia, Athens, USA","institution_ids":["https://openalex.org/I165733156"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5014633229","display_name":"Chengliang Wang","orcid":"https://orcid.org/0000-0003-0877-1064"},"institutions":[{"id":"https://openalex.org/I158842170","display_name":"Chongqing University","ror":"https://ror.org/023rhb549","country_code":"CN","type":"education","lineage":["https://openalex.org/I158842170"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Chengliang Wang","raw_affiliation_strings":["College of Computer Science, Chongqing University, Chongqing, China"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"College of Computer Science, Chongqing University, Chongqing, China","institution_ids":["https://openalex.org/I158842170"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5007530002","display_name":"Wen\u2010Zhan Song","orcid":"https://orcid.org/0000-0001-8174-1772"},"institutions":[{"id":"https://openalex.org/I165733156","display_name":"University of Georgia","ror":"https://ror.org/00te3t702","country_code":"US","type":"education","lineage":["https://openalex.org/I165733156"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"WenZhan Song","raw_affiliation_strings":["Center for Cyber-Physical Systems, University of Georgia, Athens, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Center for Cyber-Physical Systems, University of Georgia, Athens, USA","institution_ids":["https://openalex.org/I165733156"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":7.6882,"has_fulltext":false,"cited_by_count":25,"citation_normalized_percentile":{"value":0.98375062,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":95,"max":99},"biblio":{"volume":null,"issue":null,"first_page":"1","last_page":"10"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11196","display_name":"Non-Invasive Vital Sign Monitoring","score":0.9997000098228455,"subfield":{"id":"https://openalex.org/subfields/2204","display_name":"Biomedical Engineering"},"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/T11196","display_name":"Non-Invasive Vital Sign Monitoring","score":0.9997000098228455,"subfield":{"id":"https://openalex.org/subfields/2204","display_name":"Biomedical 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/T10444","display_name":"Context-Aware Activity Recognition Systems","score":0.9993000030517578,"subfield":{"id":"https://openalex.org/subfields/1707","display_name":"Computer Vision and Pattern Recognition"},"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/T10234","display_name":"Obstructive Sleep Apnea Research","score":0.9908999800682068,"subfield":{"id":"https://openalex.org/subfields/2737","display_name":"Physiology"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/metronome","display_name":"Metronome","score":0.8079318404197693},{"id":"https://openalex.org/keywords/wearable-computer","display_name":"Wearable computer","score":0.6596368551254272},{"id":"https://openalex.org/keywords/sleep","display_name":"Sleep (system call)","score":0.5992439985275269},{"id":"https://openalex.org/keywords/heart-rate","display_name":"Heart rate","score":0.5548374652862549},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5536031126976013},{"id":"https://openalex.org/keywords/vital-signs","display_name":"Vital signs","score":0.5488895773887634},{"id":"https://openalex.org/keywords/real-time-computing","display_name":"Real-time computing","score":0.5349299907684326},{"id":"https://openalex.org/keywords/frame-rate","display_name":"Frame rate","score":0.4725860357284546},{"id":"https://openalex.org/keywords/simulation","display_name":"Simulation","score":0.46597835421562195},{"id":"https://openalex.org/keywords/wearable-technology","display_name":"Wearable technology","score":0.4334813952445984},{"id":"https://openalex.org/keywords/signal","display_name":"SIGNAL (programming language)","score":0.42986780405044556},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.371112585067749},{"id":"https://openalex.org/keywords/physical-medicine-and-rehabilitation","display_name":"Physical medicine and rehabilitation","score":0.36574578285217285},{"id":"https://openalex.org/keywords/computer-vision","display_name":"Computer vision","score":0.32646477222442627},{"id":"https://openalex.org/keywords/medicine","display_name":"Medicine","score":0.28590458631515503},{"id":"https://openalex.org/keywords/rhythm","display_name":"Rhythm","score":0.20274856686592102},{"id":"https://openalex.org/keywords/embedded-system","display_name":"Embedded system","score":0.20116707682609558},{"id":"https://openalex.org/keywords/blood-pressure","display_name":"Blood pressure","score":0.11375832557678223},{"id":"https://openalex.org/keywords/anesthesia","display_name":"Anesthesia","score":0.10645228624343872}],"concepts":[{"id":"https://openalex.org/C100533687","wikidata":"https://www.wikidata.org/wiki/Q156424","display_name":"Metronome","level":3,"score":0.8079318404197693},{"id":"https://openalex.org/C150594956","wikidata":"https://www.wikidata.org/wiki/Q1334829","display_name":"Wearable computer","level":2,"score":0.6596368551254272},{"id":"https://openalex.org/C2775841894","wikidata":"https://www.wikidata.org/wiki/Q4683692","display_name":"Sleep (system call)","level":2,"score":0.5992439985275269},{"id":"https://openalex.org/C2777953023","wikidata":"https://www.wikidata.org/wiki/Q1073121","display_name":"Heart rate","level":3,"score":0.5548374652862549},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5536031126976013},{"id":"https://openalex.org/C2776890885","wikidata":"https://www.wikidata.org/wiki/Q1067560","display_name":"Vital signs","level":2,"score":0.5488895773887634},{"id":"https://openalex.org/C79403827","wikidata":"https://www.wikidata.org/wiki/Q3988","display_name":"Real-time computing","level":1,"score":0.5349299907684326},{"id":"https://openalex.org/C3261483","wikidata":"https://www.wikidata.org/wiki/Q119565","display_name":"Frame rate","level":2,"score":0.4725860357284546},{"id":"https://openalex.org/C44154836","wikidata":"https://www.wikidata.org/wiki/Q45045","display_name":"Simulation","level":1,"score":0.46597835421562195},{"id":"https://openalex.org/C54290928","wikidata":"https://www.wikidata.org/wiki/Q4845080","display_name":"Wearable technology","level":3,"score":0.4334813952445984},{"id":"https://openalex.org/C2779843651","wikidata":"https://www.wikidata.org/wiki/Q7390335","display_name":"SIGNAL (programming language)","level":2,"score":0.42986780405044556},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.371112585067749},{"id":"https://openalex.org/C99508421","wikidata":"https://www.wikidata.org/wiki/Q2678675","display_name":"Physical medicine and rehabilitation","level":1,"score":0.36574578285217285},{"id":"https://openalex.org/C31972630","wikidata":"https://www.wikidata.org/wiki/Q844240","display_name":"Computer vision","level":1,"score":0.32646477222442627},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.28590458631515503},{"id":"https://openalex.org/C135343436","wikidata":"https://www.wikidata.org/wiki/Q170406","display_name":"Rhythm","level":2,"score":0.20274856686592102},{"id":"https://openalex.org/C149635348","wikidata":"https://www.wikidata.org/wiki/Q193040","display_name":"Embedded system","level":1,"score":0.20116707682609558},{"id":"https://openalex.org/C84393581","wikidata":"https://www.wikidata.org/wiki/Q82642","display_name":"Blood pressure","level":2,"score":0.11375832557678223},{"id":"https://openalex.org/C42219234","wikidata":"https://www.wikidata.org/wiki/Q131130","display_name":"Anesthesia","level":1,"score":0.10645228624343872},{"id":"https://openalex.org/C126838900","wikidata":"https://www.wikidata.org/wiki/Q77604","display_name":"Radiology","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/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.0},{"id":"https://openalex.org/C126322002","wikidata":"https://www.wikidata.org/wiki/Q11180","display_name":"Internal medicine","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/percom45495.2020.9127369","is_oa":false,"landing_page_url":"https://doi.org/10.1109/percom45495.2020.9127369","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2020 IEEE International Conference on Pervasive Computing and Communications (PerCom)","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":32,"referenced_works":["https://openalex.org/W1599059629","https://openalex.org/W1768758265","https://openalex.org/W2034349221","https://openalex.org/W2052561945","https://openalex.org/W2059470705","https://openalex.org/W2076953400","https://openalex.org/W2086248190","https://openalex.org/W2119821739","https://openalex.org/W2143576716","https://openalex.org/W2155870806","https://openalex.org/W2296065119","https://openalex.org/W2324961432","https://openalex.org/W2397231077","https://openalex.org/W2514734051","https://openalex.org/W2518717809","https://openalex.org/W2596080951","https://openalex.org/W2596280048","https://openalex.org/W2748485178","https://openalex.org/W2756053574","https://openalex.org/W2792112256","https://openalex.org/W2799316184","https://openalex.org/W2890276013","https://openalex.org/W2901459178","https://openalex.org/W2909919933","https://openalex.org/W2927117501","https://openalex.org/W2953283152","https://openalex.org/W2965421505","https://openalex.org/W2973850470","https://openalex.org/W4238324183","https://openalex.org/W4239510810","https://openalex.org/W6726810148","https://openalex.org/W6760743557"],"related_works":["https://openalex.org/W3090300519","https://openalex.org/W2514492205","https://openalex.org/W4250401876","https://openalex.org/W2943851981","https://openalex.org/W2095299560","https://openalex.org/W2907667791","https://openalex.org/W3047461507","https://openalex.org/W3126390843","https://openalex.org/W4245880644","https://openalex.org/W2999186374"],"abstract_inverted_index":{"In":[0],"this":[1],"paper,":[2],"we":[3],"introduce":[4],"a":[5,18,45,111,195],"novel":[6,97],"real-time":[7,46,86],"and":[8,30,37,40,47,65,73,88,93,109,121,132,159,194],"contact-free":[9],"sensor":[10,53],"system,":[11],"Helena,":[12],"that":[13],"can":[14,79],"be":[15],"mounted":[16],"on":[17,69,152],"bed":[19,43,55,103],"frame":[20],"to":[21,61,125,176,190],"continuously":[22],"monitor":[23],"sleep":[24,63,83,91],"activities":[25,64],"(entry/exit":[26],"of":[27,140,168],"bed,":[28,154],"movement,":[29],"posture":[31,157],"changes),":[32],"vital":[33,66],"signs":[34,67],"(heart":[35],"rate":[36,170,184],"respiration":[38,183],"rate),":[39],"falls":[41,101,162],"from":[42,102,163],"in":[44],"pervasive":[48],"computing":[49],"manner.":[50],"The":[51,77,96,165],"smart":[52],"senses":[54],"vibrations":[56],"generated":[57],"by":[58],"body":[59],"movements":[60,151],"characterize":[62],"based":[68],"advanced":[70],"signal":[71],"processing":[72],"machine":[74],"learning":[75],"methods.":[76],"device":[78],"provide":[80],"information":[81],"about":[82],"patterns,":[84],"generate":[85],"results,":[87],"support":[89],"continuous":[90],"assessment":[92],"health":[94],"tracking.":[95],"method":[98],"for":[99,113],"detecting":[100,142,146,150,156,161],"has":[104,137],"not":[105],"been":[106],"attempted":[107],"before":[108],"represents":[110],"life-changing":[112],"high-risk":[114],"communities,":[115],"such":[116],"as":[117],"seniors.":[118],"Comprehensive":[119],"tests":[120],"validations":[122],"were":[123],"conducted":[124],"evaluate":[126],"system":[127,136,166],"performances":[128],"using":[129],"FDA":[130,192],"approved":[131],"wearable":[133],"devices.":[134],"Our":[135],"an":[138,191],"accuracy":[139],"99.5%":[141],"on-bed":[143],"(entries),":[144],"99.73%":[145],"off-bed":[147],"(exits),":[148],"97.92%":[149],"the":[153,182],"92.08%":[155],"changes,":[158],"97%":[160],"bed.":[164],"estimation":[167],"heart":[169],"(HR)":[171],"ranged":[172,186],"\u00b12.41":[173],"beats-per-minute":[174],"compared":[175,189],"Apple":[177],"Watch":[178],"Series":[179],"4,":[180],"while":[181],"(RR)":[185],"\u00b10.89":[187],"respiration-per-minute":[188],"oximeter":[193],"metronome.":[196]},"counts_by_year":[{"year":2026,"cited_by_count":3},{"year":2025,"cited_by_count":2},{"year":2024,"cited_by_count":3},{"year":2023,"cited_by_count":3},{"year":2022,"cited_by_count":5},{"year":2021,"cited_by_count":5},{"year":2020,"cited_by_count":4}],"updated_date":"2026-07-31T08:31:51.225901","created_date":"2025-10-10T00:00:00"}