{"id":11453,"global_id":"www.ibs.re.kr\/bimag?id=11453","global_id_lineage":["www.ibs.re.kr\/bimag?id=11453"],"author":"5","status":"publish","date":"2025-08-26 09:26:22","date_utc":"2025-08-26 00:26:22","modified":"2025-09-24 09:50:05","modified_utc":"2025-09-24 00:50:05","url":"https:\/\/www.ibs.re.kr\/bimag\/event\/tbd-joshua-wiley\/","rest_url":"https:\/\/www.ibs.re.kr\/bimag\/wp-json\/tribe\/events\/v1\/events\/11453","title":"Sleep as part of the 24-hour day: Methods and Applications in Oncology – Joshua Wiley","description":"

Abstract<\/strong><\/p>\n

Sleep is commonly analysed as an independent factor. However, because of the 24-hour constraints on a day, changes in sleep will co-occur with changes in remaining time use. This talk introduces compositional data analysis (CoDA) for sleep research. CoDA is illustrated using 24-hour sleep and activity data from accelerometry, first cross-sectionally showing associations between sleep and activity with daily emotions. Next, CoDA is extended to multilevel models, which commonly occur in sleep research as sleep across multiple days. A Bayesian implementation in R using the new multilevelcoda package is presented and results of a simulation study discussed. Multilevel CoDA is used to analyse how nightly sleep architecture, collected via at home EEG, predicts next day affect. CoDA solves a common constraint in sleep research with sleep stages that time in all stages sums to total sleep.<\/p>","excerpt":"","slug":"tbd-joshua-wiley","image":{"url":"https:\/\/www.ibs.re.kr\/bimag\/cms\/wp-content\/uploads\/2025\/08\/HMBrLrlLQZeLrC0q8bRL-e1756168492672.jpg","id":11463,"extension":"jpg","width":250,"height":250,"filesize":9501,"sizes":{"medium":{"width":300,"height":300,"mime-type":"image\/jpeg","filesize":12404,"url":"https:\/\/www.ibs.re.kr\/bimag\/cms\/wp-content\/uploads\/2025\/08\/HMBrLrlLQZeLrC0q8bRL-300x300.jpg"},"thumbnail":{"width":150,"height":150,"mime-type":"image\/jpeg","filesize":4617,"url":"https:\/\/www.ibs.re.kr\/bimag\/cms\/wp-content\/uploads\/2025\/08\/HMBrLrlLQZeLrC0q8bRL-150x150.jpg"},"dimag-thumbnail":{"width":400,"height":400,"mime-type":"image\/jpeg","filesize":19006,"url":"https:\/\/www.ibs.re.kr\/bimag\/cms\/wp-content\/uploads\/2025\/08\/HMBrLrlLQZeLrC0q8bRL-400x400.jpg"},"twentyseventeen-thumbnail-avatar":{"width":100,"height":100,"mime-type":"image\/jpeg","filesize":2729,"url":"https:\/\/www.ibs.re.kr\/bimag\/cms\/wp-content\/uploads\/2025\/08\/HMBrLrlLQZeLrC0q8bRL-100x100.jpg"}}},"all_day":false,"start_date":"2025-09-24 16:00:00","start_date_details":{"year":"2025","month":"09","day":"24","hour":"16","minutes":"00","seconds":"00"},"end_date":"2025-09-24 17:00:00","end_date_details":{"year":"2025","month":"09","day":"24","hour":"17","minutes":"00","seconds":"00"},"utc_start_date":"2025-09-24 07:00:00","utc_start_date_details":{"year":"2025","month":"09","day":"24","hour":"07","minutes":"00","seconds":"00"},"utc_end_date":"2025-09-24 08:00:00","utc_end_date_details":{"year":"2025","month":"09","day":"24","hour":"08","minutes":"00","seconds":"00"},"timezone":"Asia\/Seoul","timezone_abbr":"KST","cost":"","cost_details":{"currency_symbol":"$","currency_code":"USD","currency_position":"prefix","values":[]},"website":"","show_map":true,"show_map_link":true,"hide_from_listings":false,"sticky":false,"featured":false,"categories":[{"name":"Biomedical Mathematics Online Colloquium","slug":"biomedical-mathematics-colloquium","term_group":0,"term_taxonomy_id":221,"taxonomy":"tribe_events_cat","description":"","parent":231,"count":87,"filter":"raw","id":221,"urls":{"self":"https:\/\/www.ibs.re.kr\/bimag\/wp-json\/tribe\/events\/v1\/categories\/221","collection":"https:\/\/www.ibs.re.kr\/bimag\/wp-json\/tribe\/events\/v1\/categories","up":"https:\/\/www.ibs.re.kr\/bimag\/wp-json\/tribe\/events\/v1\/categories\/231"}}],"tags":[],"venue":{"id":5527,"author":"3","status":"publish","date":"2022-01-25 11:36:27","date_utc":"2022-01-25 02:36:27","modified":"2022-02-03 01:19:21","modified_utc":"2022-02-02 16:19:21","url":"https:\/\/www.ibs.re.kr\/bimag\/venue\/zoom-id-997-8258-4700-bimag-online-colloquium\/","venue":"ZOOM ID: 997 8258 4700 (Biomedical Mathematics Online Colloquium)","description":"

ZOOM ID: 997 8258 4700 (BIMAG Online Colloquium)<\/a><\/p>","slug":"zoom-id-997-8258-4700-bimag-online-colloquium","address":"(pw: 1234)","json_ld":{"@type":"Place","name":"ZOOM ID: 997 8258 4700 (Biomedical Mathematics Online Colloquium)","description":"<p>ZOOM ID: 997 8258 4700 (BIMAG Online Colloquium)<\/p>\\n","url":"","address":{"@type":"PostalAddress","streetAddress":"(pw: 1234)"},"telephone":"","sameAs":""},"show_map":false,"show_map_link":false,"global_id":"www.ibs.re.kr\/bimag?id=5527","global_id_lineage":["www.ibs.re.kr\/bimag?id=5527"]},"organizer":[{"id":3971,"author":"3","status":"publish","date":"2021-02-23 18:10:12","date_utc":"2021-02-23 09:10:12","modified":"2021-02-23 18:10:12","modified_utc":"2021-02-23 09:10:12","url":"https:\/\/www.ibs.re.kr\/bimag\/organizer\/jae-kyoung-kim\/","organizer":"Jae Kyoung Kim","slug":"jae-kyoung-kim","email":"jaekkim@kaist.ac.kr","json_ld":{"@type":"Person","name":"Jae Kyoung Kim","description":"","url":"","telephone":"","email":"jaekkim@kaist.ac.kr","sameAs":""},"global_id":"www.ibs.re.kr\/bimag?id=3971","global_id_lineage":["www.ibs.re.kr\/bimag?id=3971"]}],"custom_fields":[],"json_ld":{"@context":"http:\/\/schema.org","@type":"Event","name":"Sleep as part of the 24-hour day: Methods and Applications in Oncology – Joshua Wiley","description":"<p>Abstract Sleep is commonly analysed as an independent factor. However, because of the 24-hour constraints on a day, changes in sleep will co-occur with changes in remaining time use. This … <\/p>\\n<p class="link-more"><a href="https:\/\/www.ibs.re.kr\/bimag\/event\/tbd-joshua-wiley\/" class="more-link">Continue reading<span class="screen-reader-text"> "Sleep as part of the 24-hour day: Methods and Applications in Oncology – Joshua Wiley"<\/span><\/a><\/p>\\n","image":"https:\/\/www.ibs.re.kr\/bimag\/cms\/wp-content\/uploads\/2025\/08\/HMBrLrlLQZeLrC0q8bRL-e1756168492672.jpg","url":"https:\/\/www.ibs.re.kr\/bimag\/event\/tbd-joshua-wiley\/","eventAttendanceMode":"https:\/\/schema.org\/OfflineEventAttendanceMode","eventStatus":"https:\/\/schema.org\/EventScheduled","startDate":"2025-09-24T16:00:00+09:00","endDate":"2025-09-24T17:00:00+09:00","location":{"@type":"Place","name":"ZOOM ID: 997 8258 4700 (Biomedical Mathematics Online Colloquium)","description":"<p>ZOOM ID: 997 8258 4700 (BIMAG Online Colloquium)<\/p>\\n","url":"","address":{"@type":"PostalAddress","streetAddress":"(pw: 1234)"},"telephone":"","sameAs":""},"organizer":{"@type":"Person","name":"Jae Kyoung Kim","description":"","url":"","telephone":"","email":"jaekkim@kaist.ac.kr","sameAs":""},"performer":"Organization"}}