{"id":"https://openalex.org/W3156682619","doi":"https://doi.org/10.1109/lifetech52111.2021.9391838","title":"The relationship between each length of REM - NREM sleep cycle and sleep stage","display_name":"The relationship between each length of REM - NREM sleep cycle and sleep stage","publication_year":2021,"publication_date":"2021-03-09","ids":{"openalex":"https://openalex.org/W3156682619","doi":"https://doi.org/10.1109/lifetech52111.2021.9391838","mag":"3156682619"},"language":"en","primary_location":{"id":"doi:10.1109/lifetech52111.2021.9391838","is_oa":false,"landing_page_url":"https://doi.org/10.1109/lifetech52111.2021.9391838","pdf_url":null,"source":{"id":"https://openalex.org/S4306498803","display_name":"2021 IEEE 3rd Global Conference on Life Sciences and Technologies (LifeTech)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"conference"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2021 IEEE 3rd Global Conference on Life Sciences and Technologies (LifeTech)","raw_type":"proceedings-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/A5020577782","display_name":"Hiroko Sawai","orcid":null},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"Hiroko Sawai","raw_affiliation_strings":["Core Technology Division, Toyota Central R&D Labs., Inc, Aichi, Japan"],"affiliations":[{"raw_affiliation_string":"Core Technology Division, Toyota Central R&D Labs., Inc, Aichi, Japan","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5008054044","display_name":"Maki Matsumoto","orcid":null},"institutions":[{"id":"https://openalex.org/I27429435","display_name":"Kyoto Institute of Technology","ror":"https://ror.org/00965ax52","country_code":"JP","type":"education","lineage":["https://openalex.org/I27429435"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Maki Matsumoto","raw_affiliation_strings":["Doctoral Program of Engineering Design, Kyoto Institute of Technology, Kyoto, Japan"],"affiliations":[{"raw_affiliation_string":"Doctoral Program of Engineering Design, Kyoto Institute of Technology, Kyoto, Japan","institution_ids":["https://openalex.org/I27429435"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5102056134","display_name":"Emi Koyama","orcid":null},"institutions":[{"id":"https://openalex.org/I27429435","display_name":"Kyoto Institute of Technology","ror":"https://ror.org/00965ax52","country_code":"JP","type":"education","lineage":["https://openalex.org/I27429435"]}],"countries":["JP"],"is_corresponding":false,"raw_author_name":"Emi Koyama","raw_affiliation_strings":["Faculty of Information and Human Science, Kyoto Institute of Technology, Kyoto, Japan"],"affiliations":[{"raw_affiliation_string":"Faculty of Information and Human Science, Kyoto Institute of Technology, Kyoto, Japan","institution_ids":["https://openalex.org/I27429435"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5020577782"],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":1.7504,"has_fulltext":false,"cited_by_count":11,"citation_normalized_percentile":{"value":0.84054054,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":94,"max":99},"biblio":{"volume":null,"issue":null,"first_page":"171","last_page":"172"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10985","display_name":"Sleep and Wakefulness Research","score":0.9998000264167786,"subfield":{"id":"https://openalex.org/subfields/2805","display_name":"Cognitive Neuroscience"},"field":{"id":"https://openalex.org/fields/28","display_name":"Neuroscience"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},"topics":[{"id":"https://openalex.org/T10985","display_name":"Sleep and Wakefulness Research","score":0.9998000264167786,"subfield":{"id":"https://openalex.org/subfields/2805","display_name":"Cognitive Neuroscience"},"field":{"id":"https://openalex.org/fields/28","display_name":"Neuroscience"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T11456","display_name":"Neuroscience of respiration and sleep","score":0.9972000122070312,"subfield":{"id":"https://openalex.org/subfields/2807","display_name":"Endocrine and Autonomic Systems"},"field":{"id":"https://openalex.org/fields/28","display_name":"Neuroscience"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T10316","display_name":"Sleep and related disorders","score":0.9940999746322632,"subfield":{"id":"https://openalex.org/subfields/3205","display_name":"Experimental and Cognitive Psychology"},"field":{"id":"https://openalex.org/fields/32","display_name":"Psychology"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/non-rapid-eye-movement-sleep","display_name":"Non-rapid eye movement sleep","score":0.9821512699127197},{"id":"https://openalex.org/keywords/sleep","display_name":"Sleep (system call)","score":0.7154806852340698},{"id":"https://openalex.org/keywords/eye-movement","display_name":"Eye movement","score":0.6207329630851746},{"id":"https://openalex.org/keywords/sleep-spindle","display_name":"Sleep spindle","score":0.6108886003494263},{"id":"https://openalex.org/keywords/sleep-stages","display_name":"Sleep Stages","score":0.5632559657096863},{"id":"https://openalex.org/keywords/slow-wave-sleep","display_name":"Slow-wave sleep","score":0.5584347248077393},{"id":"https://openalex.org/keywords/rapid-eye-movement-sleep","display_name":"Rapid eye movement sleep","score":0.5205156207084656},{"id":"https://openalex.org/keywords/k-complex","display_name":"K-complex","score":0.4953111708164215},{"id":"https://openalex.org/keywords/psychology","display_name":"Psychology","score":0.47415608167648315},{"id":"https://openalex.org/keywords/audiology","display_name":"Audiology","score":0.3801160752773285},{"id":"https://openalex.org/keywords/polysomnography","display_name":"Polysomnography","score":0.31655246019363403},{"id":"https://openalex.org/keywords/medicine","display_name":"Medicine","score":0.29199737310409546},{"id":"https://openalex.org/keywords/electroencephalography","display_name":"Electroencephalography","score":0.21255093812942505},{"id":"https://openalex.org/keywords/neuroscience","display_name":"Neuroscience","score":0.17530620098114014},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.07008635997772217}],"concepts":[{"id":"https://openalex.org/C20566671","wikidata":"https://www.wikidata.org/wiki/Q1752878","display_name":"Non-rapid eye movement sleep","level":3,"score":0.9821512699127197},{"id":"https://openalex.org/C2775841894","wikidata":"https://www.wikidata.org/wiki/Q4683692","display_name":"Sleep (system call)","level":2,"score":0.7154806852340698},{"id":"https://openalex.org/C153050134","wikidata":"https://www.wikidata.org/wiki/Q760256","display_name":"Eye movement","level":2,"score":0.6207329630851746},{"id":"https://openalex.org/C143647101","wikidata":"https://www.wikidata.org/wiki/Q2738302","display_name":"Sleep spindle","level":4,"score":0.6108886003494263},{"id":"https://openalex.org/C2910364982","wikidata":"https://www.wikidata.org/wiki/Q35831","display_name":"Sleep Stages","level":4,"score":0.5632559657096863},{"id":"https://openalex.org/C110539466","wikidata":"https://www.wikidata.org/wiki/Q3964845","display_name":"Slow-wave sleep","level":3,"score":0.5584347248077393},{"id":"https://openalex.org/C2779213384","wikidata":"https://www.wikidata.org/wiki/Q211402","display_name":"Rapid eye movement sleep","level":3,"score":0.5205156207084656},{"id":"https://openalex.org/C112144039","wikidata":"https://www.wikidata.org/wiki/Q4994651","display_name":"K-complex","level":4,"score":0.4953111708164215},{"id":"https://openalex.org/C15744967","wikidata":"https://www.wikidata.org/wiki/Q9418","display_name":"Psychology","level":0,"score":0.47415608167648315},{"id":"https://openalex.org/C548259974","wikidata":"https://www.wikidata.org/wiki/Q569965","display_name":"Audiology","level":1,"score":0.3801160752773285},{"id":"https://openalex.org/C2778205975","wikidata":"https://www.wikidata.org/wiki/Q1754874","display_name":"Polysomnography","level":3,"score":0.31655246019363403},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.29199737310409546},{"id":"https://openalex.org/C522805319","wikidata":"https://www.wikidata.org/wiki/Q179965","display_name":"Electroencephalography","level":2,"score":0.21255093812942505},{"id":"https://openalex.org/C169760540","wikidata":"https://www.wikidata.org/wiki/Q207011","display_name":"Neuroscience","level":1,"score":0.17530620098114014},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.07008635997772217},{"id":"https://openalex.org/C111919701","wikidata":"https://www.wikidata.org/wiki/Q9135","display_name":"Operating system","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/lifetech52111.2021.9391838","is_oa":false,"landing_page_url":"https://doi.org/10.1109/lifetech52111.2021.9391838","pdf_url":null,"source":{"id":"https://openalex.org/S4306498803","display_name":"2021 IEEE 3rd Global Conference on Life Sciences and Technologies (LifeTech)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"conference"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2021 IEEE 3rd Global Conference on Life Sciences and Technologies (LifeTech)","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/3","score":0.6499999761581421,"display_name":"Good health and well-being"}],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":4,"referenced_works":["https://openalex.org/W1214040260","https://openalex.org/W2005519566","https://openalex.org/W2027297182","https://openalex.org/W2268544110"],"related_works":["https://openalex.org/W1972852256","https://openalex.org/W2013283479","https://openalex.org/W2096046152","https://openalex.org/W2037015499","https://openalex.org/W2030409995","https://openalex.org/W2410036221","https://openalex.org/W2057477845","https://openalex.org/W2403613045","https://openalex.org/W2319810220","https://openalex.org/W2005519566"],"abstract_inverted_index":{"A":[0],"series":[1],"of":[2,23,35,42,53,61,78,97,105,111,126,132,135],"non":[3],"rapid":[4,10],"eye":[5,11],"movement":[6,12],"(NREM)":[7],"sleep":[8,14,16,25,63,67,85,99,128,136,143],"and":[9,65,120,137],"(REM)":[13],"(REM-NREM":[15],"cycle)":[17],"repeats":[18],"across":[19],"night.":[20],"The":[21,92],"length":[22,60,96,110,125],"REM-NREM":[24,62,98,127],"cycle":[26,64,100,129],"varies":[27],"between":[28,58],"nights":[29],"or":[30],"individuals.":[31],"However,":[32],"the":[33,36,51,54,56,73],"cause":[34,52],"variation,":[37,55],"which":[38,76],"may":[39],"represent":[40],"characteristics":[41,131],"sleep,":[43],"has":[44],"not":[45],"been":[46],"well":[47],"understood.":[48],"To":[49],"verify":[50],"relationship":[57],"each":[59,95,124,133],"included":[66],"stage":[68,118,121],"was":[69],"analyzed.":[70],"We":[71],"used":[72],"obtained":[74],"data":[75],"consisted":[77],"143":[79],"days":[80],"with":[81,117],"6":[82],"to":[83,141],"7-hour":[84],"(37":[86],"healthy":[87],"males":[88],"in":[89,94,103],"their":[90],"20s).":[91],"variation":[93],"(Cycle":[101],"No.1-4":[102,113],"order":[104],"appearance)":[106],"were":[107],"observed.":[108],"Each":[109],"Cycle":[112],"had":[114],"positive":[115],"correlations":[116],"1+2":[119],"REM.":[122],"Therefore,":[123],"represented":[130],"phase":[134],"could":[138],"be":[139],"useful":[140],"evaluate":[142],"quality.":[144]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2025,"cited_by_count":3},{"year":2024,"cited_by_count":2},{"year":2023,"cited_by_count":2},{"year":2022,"cited_by_count":3}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}
