{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,12]],"date-time":"2026-03-12T05:44:42Z","timestamp":1773294282501,"version":"3.50.1"},"reference-count":39,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2018,5,29]],"date-time":"2018-05-29T00:00:00Z","timestamp":1527552000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000001","name":"National Science Foundation","doi-asserted-by":"publisher","award":["CMMI-1538447"],"award-info":[{"award-number":["CMMI-1538447"]}],"id":[{"id":"10.13039\/100000001","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Sitting posture is the position in which one holds his\/her body upright against gravity while sitting. Poor sitting posture is regarded as an aggravating factor for various diseases. In this paper, we present an inverse piezoresistive nanocomposite sensor, and related deciphering neural network, as a new tool to identify human sitting postures accurately. As a low power consumption device, the proposed tool has simple structure, and is easy to use. The strain gauge is attached to the back of the user to acquire sitting data. A three-layer BP neural network is employed to distinguish normal sitting posture, slight hunchback and severe hunchback according to the acquired data. Experimental results show that our method is both realizable and effective, achieving 98.75% posture identification accuracy. This successful application of inverse piezoresistive nanocomposite sensors reveals that the method could potentially be used for monitoring of diverse physiological parameters in the future.<\/jats:p>","DOI":"10.3390\/s18061745","type":"journal-article","created":{"date-parts":[[2018,5,29]],"date-time":"2018-05-29T02:58:18Z","timestamp":1527562698000},"page":"1745","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":23,"title":["Inverse Piezoresistive Nanocomposite Sensors for Identifying Human Sitting Posture"],"prefix":"10.3390","volume":"18","author":[{"given":"Zhe","family":"Qian","sequence":"first","affiliation":[{"name":"School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510006, China"},{"name":"SYSU-CMU Shunde International Joint Research Institute, Shunde, Foshan 528399, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3124-7551","authenticated-orcid":false,"given":"Anton E.","family":"Bowden","sequence":"additional","affiliation":[{"name":"SYSU-CMU Shunde International Joint Research Institute, Shunde, Foshan 528399, China"},{"name":"Department of Mechanical Engineering, Brigham Young University, Provo, UT 84602, USA"}]},{"given":"Dong","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510006, China"},{"name":"SYSU-CMU Shunde International Joint Research Institute, Shunde, Foshan 528399, China"}]},{"given":"Jia","family":"Wan","sequence":"additional","affiliation":[{"name":"School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510006, China"},{"name":"SYSU-CMU Shunde International Joint Research Institute, Shunde, Foshan 528399, China"}]},{"given":"Wei","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510006, China"},{"name":"SYSU-CMU Shunde International Joint Research Institute, Shunde, Foshan 528399, China"}]},{"given":"Xiao","family":"Li","sequence":"additional","affiliation":[{"name":"School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510006, China"}]},{"given":"Daniel","family":"Baradoy","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, Brigham Young University, Provo, UT 84602, USA"}]},{"given":"David T.","family":"Fullwood","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering, Brigham Young University, Provo, UT 84602, USA"}]}],"member":"1968","published-online":{"date-parts":[[2018,5,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"379","DOI":"10.1016\/j.amepre.2010.05.024","article-title":"Occupational sitting and health risks: A systematic review","volume":"39","author":"Uffelen","year":"2010","journal-title":"Am. J. Prev. Med."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"63","DOI":"10.1093\/oxfordjournals.aje.a112135","article-title":"Driving motor vehicles as risk factor for acute herniated lumbar intervertebral disc","volume":"102","author":"Kelsey","year":"1975","journal-title":"Am. J. Epidemiol."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"197","DOI":"10.1093\/ije\/4.3.197","article-title":"An epidemiological study of the relationship between occupations and acute herniated lumbar intervertebral discs","volume":"4","author":"Kelsey","year":"1975","journal-title":"Int. J. Epidemiol."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"22","DOI":"10.1016\/j.apergo.2016.10.007","article-title":"Repositioning a Passive Patient in Bed: Choosing an Ergonomically Advantageous Assistive Device","volume":"60","author":"Weiner","year":"2017","journal-title":"Appl. Ergon."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"775","DOI":"10.1111\/aos.13148","article-title":"Associations of reading posture, gaze angle and reading distance with myopia and myopic progression","volume":"94","author":"Parssinen","year":"2016","journal-title":"Acta Ophthalmol."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"37","DOI":"10.1080\/19338244.2011.573020","article-title":"Prevalence of Musculoskeletal Disorders among Cashew Factory Workers","volume":"67","author":"Girish","year":"2012","journal-title":"Arch. Environ. Occup. Health"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"54","DOI":"10.1016\/j.math.2009.06.002","article-title":"The influence of different sitting posture on head\/neck posture and muscle activity","volume":"15","author":"Caneiro","year":"2010","journal-title":"Manu. Ther."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"200","DOI":"10.1136\/oem.58.3.200","article-title":"Are neck flexion, neck rotation, and sitting at work risk factors for neck pain? Results of a prospective cohort study","volume":"58","author":"Ariens","year":"2001","journal-title":"Occup. Environ. Med."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"126","DOI":"10.1371\/journal.pone.0090633","article-title":"The Burden of Musculoskeletal Conditions","volume":"9","author":"Palazzo","year":"2014","journal-title":"PLoS ONE"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"797","DOI":"10.1007\/s00420-009-0410-0","article-title":"Sedentary lifestyle as a risk factor for low back pain: A systematic review","volume":"82","author":"Chen","year":"2009","journal-title":"Int. Arch. Occup. Environ. Health"},{"key":"ref_11","first-page":"230","article-title":"Is sitting-while-at work associated with low back pain? A systematic, critical literature review","volume":"28","author":"Hartvigsen","year":"2000","journal-title":"Scand. J. Public Health"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"283","DOI":"10.1007\/s00586-006-0143-7","article-title":"Association between sitting and occupational LBP","volume":"16","author":"Lis","year":"2007","journal-title":"Eur. Spine J."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"674","DOI":"10.1080\/001401399185388","article-title":"Current techniques for assessing physical exposure to worked-related musculoskeletal risks, with emphasis on posture-based methods","volume":"42","author":"Li","year":"1999","journal-title":"Ergonomics"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"1238","DOI":"10.1097\/00007632-200206010-00019","article-title":"The effect of different standing and sitting postures on trunk muscle activity in a pain-free population","volume":"27","author":"Sullivan","year":"2002","journal-title":"Spine"},{"key":"ref_15","first-page":"26","article-title":"Back pain","volume":"67","author":"Ehrlich","year":"2003","journal-title":"J. Rheumatol. Suppl."},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Jaimes, A., and Liu, J.Y. (2005, January 11). Sit straight (and tell me what I did today): A human posture alarm and activity summarization system. Proceedings of the 2nd ACM Workshop on Continuous Archival and Retrieval of Personal Experiences, Hilton, Singapore.","DOI":"10.1145\/1099083.1099087"},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Paliyawan, P., Nukoolkit, C., and Mongkolnam, P. (2014, January 14\u201317). Prolonged sitting detection for office workers syndrome prevention using Kinect. Proceedings of the 11th International Conference on Electrical Engineering\/Electronics, Computer, Telecommunications and Information Technology, Nakhon Ratchasima, Thailand.","DOI":"10.1109\/ECTICon.2014.6839785"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"215","DOI":"10.1109\/7333.928581","article-title":"Analysis of sliding and pressure distribution during a repositioning of persons in a simulator chair","volume":"9","author":"Aissaoui","year":"2001","journal-title":"IEEE Trans. Neural Syst. Rehabil. Eng."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"719","DOI":"10.3390\/s17040719","article-title":"Posture Detection on Smart Cushion for Wheelchair Users","volume":"17","author":"Ma","year":"2017","journal-title":"Sensors"},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Roh, J., Roh, J., Park, H.-J., Lee, K.J., Hyeong, J., Kim, S., and Lee, B. (2018). Sitting posture monitoring system based on a low-cost load cell using machine learning. Sensors, 18.","DOI":"10.3390\/s18010208"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"394","DOI":"10.1016\/j.sna.2017.11.054","article-title":"Real-time sitting posture correction system based on highly durable and washable electronic textile pressure sensors","volume":"269","author":"Kim","year":"2018","journal-title":"Sens. Actuators A Phys."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"3587","DOI":"10.1166\/jnn.2009.NS34","article-title":"Elastomer-carbon nanotube composites as prospective multifunctional sensing materials","volume":"9","author":"Knite","year":"2009","journal-title":"J. Nanosci. Nanotechnol."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"1821","DOI":"10.1021\/nl204052z","article-title":"A highly elastic, capacitive strain gauge based on percolating nanotube networks","volume":"12","author":"Cohen","year":"2012","journal-title":"Nano Lett."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"40","DOI":"10.1016\/j.sna.2010.12.022","article-title":"Optimization of nickel nanocomposite for large strain sensing applications","volume":"166","author":"Johnson","year":"2011","journal-title":"Sens. Actuators A Phys."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"2345","DOI":"10.1039\/c3nr05496a","article-title":"Wearable multifunctional sensors using printed stretchable conductors made of silver nanowires","volume":"6","author":"Yao","year":"2014","journal-title":"Nanoscale"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"501","DOI":"10.1088\/0957-4484\/26\/37\/375501","article-title":"Ultra-Stretchable and Skin-Mountable Strain Sensors using Carbon Nanotubes-Ecoflex Nanocomposites","volume":"26","author":"Amjadi","year":"2015","journal-title":"Nanotechnology"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"1171","DOI":"10.3390\/s16081171","article-title":"A Spray-On Carbon Nanotube Artificial Neuron Strain Sensor for Composite Structural Health Monitoring","volume":"16","author":"Choi","year":"2016","journal-title":"Sensors"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"1678","DOI":"10.1002\/adfm.201504755","article-title":"Stretchable, Skin-Mountable, and Wearable Strain Sensors and Their Potential Applications: A Review","volume":"26","author":"Amjadi","year":"2016","journal-title":"Adv. Funct. Mater."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"45","DOI":"10.1016\/j.compositesb.2014.11.028","article-title":"Evolution of nano-junctions in piezoresistive nanostrand composites","volume":"72","author":"Bilodeau","year":"2015","journal-title":"Compos. Part B"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"534","DOI":"10.1016\/j.compositesb.2014.09.029","article-title":"Piezoresistive in-situ strain sensing of composite laminate structures","volume":"69","author":"Koecher","year":"2015","journal-title":"Compos. Part B"},{"key":"ref_31","unstructured":"Baradoy, D.A. (2015). Composite Based Modeling of Nickel Nano-Composite Strain Sensors with Applications in Fetal Monitoring. [Master\u2019s Thesis, Brigham Young University]."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"1155","DOI":"10.1016\/j.compositesb.2011.09.014","article-title":"Strain monitoring of carbon fiber composite via embedded nickel nano-particles","volume":"43","author":"Johnson","year":"2012","journal-title":"Compos. Part B"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"413","DOI":"10.2106\/00004623-199403000-00012","article-title":"Mechanical behavior of the human lumbar and lumbosacral spine as shown by three-dimensional load-displacement curves","volume":"76","author":"Panjabi","year":"1994","journal-title":"J. Bone Joint Surg. Am."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"184","DOI":"10.1113\/jphysiol.1955.sp005347","article-title":"The function of the erectores spinae muscles in certain movements and postures in man","volume":"129","author":"Floyd","year":"1995","journal-title":"J. Physiol."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"129","DOI":"10.1093\/rheumatology\/14.3.129","article-title":"Towards a better understanding of low-back-pain: A review of the mechanics of the lumbar disc","volume":"14","author":"Nachemson","year":"1975","journal-title":"Rheumatol. Rehabil."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"85","DOI":"10.1016\/j.neunet.2014.09.003","article-title":"Deep Learning in Neural Networks: An Overview","volume":"61","author":"Schmidhuber","year":"2015","journal-title":"Neural. Netw."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"436","DOI":"10.1038\/nature14539","article-title":"Deep Learning","volume":"521","author":"Yoshua","year":"2015","journal-title":"Nature"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"456","DOI":"10.1016\/j.measurement.2008.08.013","article-title":"Prediction of the intern parameters tomato greenhouse in a semi-arid area using a time-series model of artificial neural networks","volume":"42","author":"Dariouchy","year":"2009","journal-title":"Measurement"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"764","DOI":"10.1016\/j.measurement.2008.12.008","article-title":"The idea of using artificial neural network in measurement system with hot probe for testing parnmeters of heat-insulating materials","volume":"42","author":"Chudzik","year":"2009","journal-title":"Measurement"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/18\/6\/1745\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T15:06:18Z","timestamp":1760195178000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/18\/6\/1745"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,5,29]]},"references-count":39,"journal-issue":{"issue":"6","published-online":{"date-parts":[[2018,6]]}},"alternative-id":["s18061745"],"URL":"https:\/\/doi.org\/10.3390\/s18061745","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2018,5,29]]}}}